Artykuły w czasopismach: „Brake testing”

1

Skorupka, Zbigniew. "Thermographic Camera Use in Brake Oriented Friction Materials Tests / Użycie Kamery Termowizyjnej w Badaniach Hamulcowych Materiałów Ciernych". Journal of KONBiN 33, nr 1 (1.09.2015): 81–90. http://dx.doi.org/10.1515/jok-2015-0006.

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Abstract Friction brake temperature due to its influence on brakes’ operation is subject to many test and studies. Measurements methods of this important brake parameter are being continuously developed. In order to withstand difficulty in temperature evaluation in full brake system as well as in isolated friction pair is use of contactless measurement methods. Currently, the most widespread contactless testing method of the thermal effects is to measure infrared emission by pyrometers or thermographic (infrared) cameras. Thermal imaging method wasn’t used so far during aviation brake materials usefulness evaluation and certification testing performed in Instytut Lotnictwa Landing Gear Laboratory. In this paper, author described performed friction materials tests which were recorded with thermal imaging camera as well as evaluated usefulness of the method by comparing its accuracy to thermocouple measurement.

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Gramstat, Sebastian, Thilo Mertens, Robert Waninger i Dmytro Lugovyy. "Impacts on Brake Particle Emission Testing". Atmosphere 11, nr 10 (21.10.2020): 1132. http://dx.doi.org/10.3390/atmos11101132.

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The presented article picks out brake particle emission testing as a central theme. Those emissions are part of the so-called non-exhaust emissions, which play an increasing role for particle emissions from transportation. The authors propose a laboratory test setup by using a brake dynamometer and a constant volume sampling approach to determine the emissions in regard to the particle number concentration. Several impacts were investigated while the same test cycle (novel worldwide harmonized light vehicles test procedure (novel-WLTP)) was applied. In a first item, the importance of the bedding process was investigated and it is shown that friction couples without bedding emit much more particles. Furthermore, the efforts for reaching a bedded friction state are discussed. Additionally, the impact of brake lining compositions is investigated and shows that NAO concepts own crucial advantages in terms of brake particle emissions. Another impact, the vehicle weight and inertia, respectively, shows how important lightweight measures and brake cooling improvements are. Finally, the role of the load profile is discussed, which shows the importance of driving parameters like vehicle speed and reservoir dynamics. The authors show that, under urban driving conditions, extreme low particle emissions are detected. Furthermore, it is explained that off-brake emissions can play a relevant role in regard to brake particle emissions.

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Yang, Cheng Hui. "A New Mathematical Model of Brake Test Stand Control System". Advanced Materials Research 562-564 (sierpień 2012): 975–78. http://dx.doi.org/10.4028/www.scientific.net/amr.562-564.975.

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All of the performances of the car, break performance is one of the most important. In the stage of automotive design, road tests usually are not available, only special brake tests are used to simulate the test. Using brake tester is a good measure to decide the vehicle braking performance. To carry out the brakes test and to explore inertia, it can better simulate the actual use of the brake mode and environmental conditions, a more realistic response to brake performance, not only brake to improve the level of R & D to enhance the braking technology, but also can improve brake testing technology to improve the design level test bench, the most critical is a good control analysis of the mathematical modeling of the brake product development, quality control, and vehicle braking performance are very important. Based on the data calculation and analysis, model, and the control algorithm, obtained reasonable control of the brake test bench mathematical modeling, and the method to do the appropriate improvements.

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Fu, Chuan Qi, Zhou Wang, Bin Li i Chi Yu. "The Dynamics Simulation of Braking Process on Automobile Disc Brake". Advanced Materials Research 139-141 (październik 2010): 2658–61. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.2658.

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For a certain type of automobile disc brakes, brake discs and friction linings were modeled by Pro/E. The dynamics simulations of braking process on disc brake were performed by the frictional contact algorithm and nonlinear finite element method. Distribution of stress, strain and displacement on the brake parts were investigated with different initial velocity. Analysis results shown that redistributions of stress and strain had occurred on the face of brake disc and friction linings in braking process. Meanwhile, the increased initial velocity resulted in increased stress and stain. Besides the stress concentrations appeared in brake disc role and friction lining corners at the beginning of braking, however, stress and stain became uniform along the braking. Analysis results provided the research of the optimum design and testing of disc brake with theoretic gist. And some improvement measures to the structure of disc brake were proposed.

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BĄKOWSKI, Henryk, Zbigniew STANIK i Andrzej KUBIK. "TESTING BRAKE FLUID WEAR PROCESSES IN COMPLEX CONSTRAINED CONDITIONS". Tribologia 273, nr 3 (30.06.2017): 21–27. http://dx.doi.org/10.5604/01.3001.0010.6115.

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The study determined the effect of increased water content in a brake fluid by measuring its hydration and boiling temperature and examining the impact of brake fluid wear on the safety and reliability of a braking system. Within the scope of work, the temperature of the brake discs was determined according to the braking distance. An experimental bench was set up to determine the boiling point of the hydrated brake fluid. The position is designed to reflect the operating conditions of intense braking and lead to the boiling of the brake fluid. A summary of all laboratory and operating tests of the brake fluid tested allowed the minimum braking distance to be determined after which the brake fluid of varying degrees of hydration (over various operating periods) could boil beyond the permitted boiling point.

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Hesse, David, Christopher Hamatschek, Klaus Augsburg, Thomas Weigelt, Alexander Prahst i Sebastian Gramstat. "Testing of Alternative Disc Brakes and Friction Materials Regarding Brake Wear Particle Emissions and Temperature Behavior". Atmosphere 12, nr 4 (29.03.2021): 436. http://dx.doi.org/10.3390/atmos12040436.

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In this study, different disc brakes and friction materials are evaluated with respect to particle emission output and characteristic features are derived. The measurements take place on an inertia dynamometer using a constant volume sampling system. Brake wear particle emission factors of different disc concepts in different sizes are determined and compared, using a grey cast iron disc, a tungsten carbide-coated disc and a carbon ceramic disc. The brakes were tested over a section (trip #10) novel test cycle developed from the database of the worldwide harmonized Light-Duty vehicles Test Procedure (WLTP). First, brake emission factors were determined along the bedding process using a series of trip-10 tests. The tests were performed starting from unconditioned pads, to characterize the evolution of emissions until their stabilization. In addition to number- and mass-related emission factors (PM2.5–PM10), the particle size distribution was determined. Another focus was the evaluation of temperature ranges and the associated challenges in the use of temperature readings in a potential regulation of brake wear particle emissions. The results illustrate the challenges associated with establishing a universal bedding procedure and using disc temperature measurements for the control of a representative braking procedure. Using tungsten carbide coated discs and carbon ceramic discs, emission reduction potentials of up to 70% (PM10) could be demonstrated along the WLTP brake cycle. The reduction potential is primarily the result of the high wear resistance of the disc, but is additionally influenced by the pad composition and the temperature in the friction contact area.

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Zhu, Xiao Wei, Fu Shan Zuo, Ying Xu i Xiao Kang Shi. "The Analysis of the Testing Accuracy of the Anti-Force Rolling Brake Testing Platform". Applied Mechanics and Materials 742 (marzec 2015): 140–46. http://dx.doi.org/10.4028/www.scientific.net/amm.742.140.

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Many Factors influencing the testing accuracy are discussed according to the differences between the testing data of most of the domestic anti-force rolling brake testing platform. We try to get the theoretical analysis and be proved by experiment through the mechanical model. We focus on some respects just as attachment coefficient, tire pressure, vehicle moving and direction displacement which influencing the testing accuracy of the anti-force rolling brake testing platform.

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Xu, An, i Xiang Ming Qiao. "Brake Performance Testing and Analyzing of Light Commercial Vehicle". Applied Mechanics and Materials 253-255 (grudzień 2012): 2188–91. http://dx.doi.org/10.4028/www.scientific.net/amm.253-255.2188.

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In order to determine the statistical characteristics and distributive regularity of a light commercial vehicle’s braking performance, and further establish corresponding statistical models of vehicle braking performance, large sample testing and statistical analyzing of 220 vehicle’s braking performance are carried out with brake tester bed, as well as 6 braking performance’s optimal fitting distributions and the distributive parameters are obtained also. By means of the statistical characteristics and distributive regularity of the brake performance, the statistical models of the 6 braking performance are established, the model included the probability density function and the distributive function. The calculating results show that in all established models, the largest calculating error absolute value is 6.24%, and the smallest only 0.23%. This research will play an important guiding significance and role to truly evaluating vehicle brake safety performance, improving vehicle brake system design, manufacture, maintenance and repair, as well as revising the relevant limits of vehicle brake safety laws and regulations.

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TUSZYŃSKI, Waldemar, Michał GIBAŁA, Andrzej GOSPODARCZYK, Stanisław KOZIOŁ, Krzysztof MATECKI, Witold PIEKOSZEWSKI, Mariusz SICZEK, Marian SZCZEREK i Jacek WOJUTYŃSKI. "THE NEW INERTIA DYNAMOMETER FOR FRICTION AND WEAR TESTING OF BRAKE PADS AND BRAKE DISCS". Tribologia 286, nr 4 (31.08.2019): 113–19. http://dx.doi.org/10.5604/01.3001.0013.5972.

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For the sake of driving safety, the right choice of the brake pad friction material and its manufacturing processes to obtain the appropriate tribological properties is a matter of priority for brake pad manufacturers. Determination of the tribological properties is best done in component tests, i.e. in the setup: brake pads – brake disc. At the request of one of the domestic brake pad manufacturers, as part of the POIR project, an inertia dynamometer for testing friction and wear of brake pads and brake discs was developed and manufactured, which was given the symbol T-33. A test methodology was developed based on the “Cold application section” procedure described in SAE J2522:2003. The T-33 inertia dynamometer is designed for testing brake pads and brake discs intended for five vehicles representing the passenger vehicle class and vans. The paper presents the new test stand, test methodology, and results of verification tests of the T-33 dynamometer (interlaboratory comparison tests) performed on the Cinquecento vehicle brake setup.

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Liu, Xue Jun, Ren He, Cun Xiang Liu i Er Li Zhang. "Design and Establishment of HIL Testing Bench for Electromagnetic and Hydraulic Hybrid Brake System". Advanced Materials Research 889-890 (luty 2014): 942–46. http://dx.doi.org/10.4028/www.scientific.net/amr.889-890.942.

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This paper discussed the brake performance and reviewed the research progress of the eddy current-hydraulic hybrid brake system. The paper mainly described the design principle of HIL testing bench, and presented a structure drawing of HIL testing bench. Based on the basic principle and structure of HIL testing bench, a real testing bench including hardware, software, interface, and virtual controller on PCs etc., is manufactured. Through two kinds of experiments on wet and dry road, the results indicates that the hybrid brake system has a perfect performance, the HIL testing bench of hybrid brake system is very convenient to study and simulate the braking system. Because the simulation on PCs cannot solve lots of actual problems, with the HIL testing bench, more actual research project can be done in the future.

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MUZDYBAEV, M. S., A. S. MUZDYBAEVA, V. V. ROGOVSKIJ, D. M. MYRZABEKOVA, A. B. ELEMES, Wojciech WIELEBA i Tadeusz LEŚNIEWSKI. "PRELIMINARY EXPERIMENTAL RESEARCH OF TRIBOLOGICAL PROPERTIES OF BUS BRAKES FRICTION LININGS". Tribologia 268, nr 4 (31.08.2016): 167–76. http://dx.doi.org/10.5604/01.3001.0010.6992.

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Experience gained from the use of buses in urban conditions showed that the working conditions of friction elements of the braking system, ensuring traffic safety, are associated with high loads. This leads to the intensive wear and premature replacement of the worn friction components, which reduces the overall reliability of the brake system and road safety. On the other hand, the friction linings of brake mechanisms may act as abrasives that cause the wear of brake discs or drums. Their replacement during operation is associated with a significant increase in the cost of spare parts. Therefore, it is assumed that the determination of the tribological properties of the brake linings in the brake mechanisms, before their exploitation, will increase the efficiency and safety of the vehicles’ operation, which justifies the choice of the research subject matter for its real and practical significance. The paper presents the preliminary results of the research into the main elements of the brakes in a city bus on a test stand mapping the real working conditions. For the testing, brake shoes of different manufacturers were used. Their tribological characteristics, reasons for their wear, and operational recommendations were determined.

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12

Hochlenert, Daniel, Gottfried Spelsberg-Korspeter i Peter Hagedorn. "Friction Induced Vibrations in Moving Continua and Their Application to Brake Squeal". Journal of Applied Mechanics 74, nr 3 (22.06.2006): 542–49. http://dx.doi.org/10.1115/1.2424239.

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Considerable effort is spent in the design and testing of disk brake systems installed in modern passenger cars. This effort can be reduced if appropriate mathematical–mechanical models are used for studying the dynamics of these brakes. In this context, the mechanism generating brake squeal in particular deserves closer attention. The present paper is devoted to the modeling of self-excited vibrations of moving continua generated by frictional forces. Special regard is given to an accurate formulation of the kinematics of the frictional contact in two and three dimensions. On the basis of a travelling Euler–Bernoulli beam and a rotating annular Kirchhoff plate with frictional point contact the essential properties of the contact kinematics leading to self-excited vibrations are worked out. A Ritz discretization is applied and the obtained approximate solution is compared to the exact one of the traveling beam. A minimal disk brake model consisting of the discretized rotating Kirchhoff plate and idealized brake pads is analyzed with respect to its stability behavior resulting in traceable design proposals for a disk brake.

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13

Miller, Jonathan I., Leon M. Henderson i David Cebon. "Designing and testing an advanced pneumatic braking system for heavy vehicles". Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 227, nr 8 (19.11.2012): 1715–29. http://dx.doi.org/10.1177/0954406212467578.

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Heavy goods vehicles exhibit poor braking performance in emergency situations when compared to other vehicles. Part of the problem is caused by sluggish pneumatic brake actuators, which limit the control bandwidth of their antilock braking systems. In addition, heuristic control algorithms are used that do not achieve the maximum braking force throughout the stop. In this article, a novel braking system is introduced for pneumatically braked heavy goods vehicles. The conventional brake actuators are improved by placing high-bandwidth, binary-actuated valves directly on the brake chambers. A made-for-purpose valve is described. It achieves a switching delay of 3–4 ms in tests, which is an order of magnitude faster than solenoids in conventional anti-lock braking systems. The heuristic braking control algorithms are replaced with a wheel slip regulator based on sliding mode control. The combined actuator and slip controller are shown to reduce stopping distances on smooth and rough, high friction ( μ = 0.9) surfaces by 10% and 27% respectively in hardware-in-the-loop tests compared with conventional ABS. On smooth and rough, low friction ( μ = 0.2) surfaces, stopping distances are reduced by 23% and 25%, respectively. Moreover, the overall air reservoir size required on a heavy goods vehicle is governed by its air usage during an anti-lock braking stop on a low friction, smooth surface. The 37% reduction in air usage observed in hardware-in-the-loop tests on this surface therefore represents the potential reduction in reservoir size that could be achieved by the new system.

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14

Surblys, Vytenis, i Edgar Sokolovskij. "Research of the Vehicle Brake Testing Efficiency". Procedia Engineering 134 (2016): 452–58. http://dx.doi.org/10.1016/j.proeng.2016.01.067.

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Huang,, Xiaoya, Hu Zhang i Wei Li. "The design of brake fatigue testing system". MATEC Web of Conferences 34 (2015): 02011. http://dx.doi.org/10.1051/matecconf/20153402011.

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K.J. Law Engineers Inc. "Automatic hardness testing for disc brake rotors". NDT & E International 24, nr 1 (luty 1991): 58. http://dx.doi.org/10.1016/0963-8695(91)90809-h.

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He, Ren, i Daxing Huang. "Automatic testing method for static pressure drive performance of electronic hydraulic brake system". Thermal Science 24, nr 3 Part A (2020): 1529–36. http://dx.doi.org/10.2298/tsci190511018h.

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To solve the problem of static pressure transmission performance of electronic hydraulic brake system, the mathematical models of main cylinder, solenoid valve, accumulator, and motor hydraulic pump of electronic hydraulic brake system are established. Based on the mathematical model, the static pressure transmission performance of electronic hydraulic brake system is analyzed. Then the standard normal state model of static pressure transmission performance of electronic hydraulic brake system is established by statistical method. The threshold correlation degree between the vibration signal of the static pressure drive and the normal state mode obtained by the vibration acceleration sensor are calculated. If the threshold correlation degree is greater than or equal to 0.5, the precision pressure transmission state of the electronic hydraulic brake system to be tested belongs to the standard normal state, and the threshold correlation degree is less than 0.5, indicating that the precision pressure transmission state of the electronic hydraulic brake system to be tested does not belong to the standard normal state. The test results show that the proposed method can effectively detect the boost response of the static pressure transmission of the electronic hydraulic brake system under high and low strength conditions under normal conditions and accumulator failure conditions. The method can effectively detect the static pressure transmission state of the electronic hydraulic brake system belongs to the fault state according to the threshold correlation degree, which is consistent with the simulation results.

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Bukhori, Rizal Akhmad, Eko Surojo i Nurul Muhayat. "Perancangan Dinamometer Skala Kecil untuk Pengujian Karakteristik Gesek Bahan Blok Rem Kereta Api". Jurnal Nasional Teknologi Terapan (JNTT) 2, nr 3 (8.05.2019): 321. http://dx.doi.org/10.22146/jntt.44937.

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The brake blocks are components of the railway braking system that are useful for reducing speed or stopping the railway. In the development of railway brake block material needs a device that capable of testing the characteristics of the brake block material. One of the important characteristics of the brake block material is the frictional characteristic. The method of testing the frictional characteristics of existing brake blocks include using the pin on disc method, direct testing on the railway and using a full-scale dynamometer. The full-scale dynamometer has advantages than other methods because it can test specimens according to the actual railway braking conditions in a short time and less preparations. However, with the same specimen size as the original, the cost of making the specimen and the full-scale dynamometer become expensive. Therefore, to reduce the cost of making device and test specimens, this study will design the dynamometer small-scale brake block testing. This paper use Pahl and Beitz design method which divides the design into four stages: clarification of the task, conceptual design, embodiment design, and detail design. This dynamometer is designed by considering function designs, structures, and forces that are adapted to the brake block contact pressure according to the original conditions. This dynamometer is designed to vary material, wheel speed, and contact presssure with the output of measurement of friction coefficient of brake block material. Brake block test specimens have a reduced size with a 1: 4 scale from their original size. The results obtained from this research are engineering drawings and dynamometer test model of railway braking.

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Ma, Xi Qin, Chang Qi Yang i Guang Sheng Ren. "A Novel Evaluation Method for Overall Performance Testing of Rail Transit Brake System". Advanced Materials Research 156-157 (październik 2010): 113–16. http://dx.doi.org/10.4028/www.scientific.net/amr.156-157.113.

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A system is developed to detect output pressure of rail transit brake system and the principle of the system design is expatiated. The function and the implement method of each block in the system are also discussed. According to the problems existed in detection of rail transit brake system, we propose a new evaluation index to detect overall performance of rail transit brake system.

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Bao, Yu, Guo Tian Wang i Hou Li Zhao. "Testing Study on a Kind of Vehicle-Mounted Magnetorheological Retarder Testing Bed". Applied Mechanics and Materials 490-491 (styczeń 2014): 1526–30. http://dx.doi.org/10.4028/www.scientific.net/amm.490-491.1526.

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Automobile auxiliary brake, also known as retarder, is the key equipment to ensure the safety of automobile driving. Its operating quality which is guaranteed by a perfect test system and good test equipment has always been playing an important role. Studies on the test system of miniature vehicle-mounted retarder should be carried out, in order to make it easier to simulate its actual usage and environmental conditions, and also make it more authentic to reflect the properties of magnetorheological fluid retarder. In this way, the research and development level of magnetorheological retarder can be improved, the development cycle can be shortened which leads to the enhancement of brake technology; the test technique of the the magnetorheological retarder and the test level of test bed can also be improved which has a very vital significance to the research and the quality assurance of magnetorheological retarder products and the development of the vehicle braking performance.

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Dąbrowski, Tomasz, Dariusz Kurczyński, Piotr Łagowski i Michał Warianek. "The analysis of burnishing process influence on disc brake friction characteristics and its influence on vehicle safety- by interia brake dynamometer testing". AUTOBUSY – Technika, Eksploatacja, Systemy Transportowe 19, nr 6 (30.06.2018): 393–98. http://dx.doi.org/10.24136/atest.2018.100.

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The article describes the influence of the burnishing process on the disc brake friction characteristics. It shows the importance of brake burnish and how unburnished brake can affect vehicle safety. It shows the brake dynamometer test results obtained on six different brake pads compounds, their detailed analysis and comparison.

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Arasu, S., i A. Krishnamoorthy. "Design and Manufacturing of Conical Vent Profile Disc Brake". Applied Mechanics and Materials 766-767 (czerwiec 2015): 1028–33. http://dx.doi.org/10.4028/www.scientific.net/amm.766-767.1028.

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Braking system is one amongst the foremost vital contact mechanisms in an automobile. The braking potency in automobile depends on the desertion characteristics of the constraint assembly. The heat refusal from the system is proportional to the desertion of brake. This paper aims to bring out producing, testing of conical shape vent profile and studies of existing cooling vent profile heat refusal throughout the braking. This result reduces the thermal and structural stress on the brake plate. The prevailing vehicles brakes has been made from cylindrical vent profiles that in theory has lesser cooling potency because the direction of the air flow .The profile favor to increase the cooling potency by conical shape vent. The vent is reshaped in such some way that the face of the round shape vent is within the direction of air flow throughout vehicle motion that permits a lot of quantity of air to flow across the brake plate. This style changes results to extend the heat convey rate throughout the braking

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Qin, Xing Shun, Jian Bo Wang i Sa Han. "Testing of the Braking Performance for the Middle Truck Driving through the Mountain Highway Long Downhill Slope". Advanced Materials Research 1030-1032 (wrzesień 2014): 2135–39. http://dx.doi.org/10.4028/www.scientific.net/amr.1030-1032.2135.

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We select the straight truck which install the engine brake (Jacobs)without water spray,carrying out braking performance limit parameter test on the 26km length,2.57% average longitudinal grade of the mountain highway.The test shows that when the truck passes downhill and open the engine brake (Jacobs),the brake drum temperature maintained at 150 °C or less.So it can solve the straight truck pass the long downhill sections of mountain highway fundamentally and the brake without spraying water.

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Rahimi, Mostafa, Daniele Bortoluzzi i Jens Wahlström. "Input Parameters for Airborne Brake Wear Emission Simulations: A Comprehensive Review". Atmosphere 12, nr 7 (4.07.2021): 871. http://dx.doi.org/10.3390/atmos12070871.

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Non-exhaust emissions, generated by the wear of brake systems, tires, roads, clutches, and road resuspension, are responsible for a large part of airborne pollutants in urban areas. Brake wear accounts for 55% of non-exhaust emissions and significantly contributes to urban health diseases related to air pollution. A major part of the studies reported in the scientific literature are focused on experimental methods to sample and characterize brake wear particles in a reliable, representative, and repeatable way. In this framework, simulation is an important tool, which makes it possible to give interpretations of the experimental results, formulate new testing approaches, and predict the emission produced by brakes. The present comprehensive literature review aims to introduce the state of the art of the research on the different aspects of airborne wear debris resulting from brake systems which can be used as inputs in future simulation models. In this review, previous studies focusing on airborne emissions produced by brake systems are investigated in three main categories: the subsystem level, system level, and environmental level. As well as all the information provided in the literature, the simulation methodologies are also investigated at all levels. It can be concluded from the present review study that various factors, such as the uncertainty and repeatability of the brake wear experiments, distinguish the results of the subsystem and system levels. This gap should be taken into account in the development of future experimental and simulation methods for the investigation of airborne brake wear emissions.

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Borawski, Andrzej. "Suggested Research Method for Testing Selected Tribological Properties of Friction Components in Vehicle Braking Systems". Acta Mechanica et Automatica 10, nr 3 (1.09.2016): 223–26. http://dx.doi.org/10.1515/ama-2016-0034.

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Abstract The braking system is one of the most important systems in any vehicle. Its proper functioning may determine the health and life the people inside the vehicle as well as other road users. Therefore, it is important that the parameters which characterise the functioning of brakes changed as little as possible throughout their lifespan. Multiple instances of heating and cooling of the working components of the brake system as well as the environment they work in may impact their tribological properties. This article describes a method of evaluating the coefficient of friction and the wear speed of abrasive wear of friction working components of brakes. The methodology was developed on the basis of Taguchi’s method of process optimization.

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Gramstat, Sebastian, André Cserhati, Matthias Schroeder i Dmytro Lugovyy. "Brake Particle Emission Measurements - Testing Method and Results". SAE International Journal of Engines 10, nr 4 (28.03.2017): 1841–46. http://dx.doi.org/10.4271/2017-01-0996.

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Cantoni, Carlo, Giampiero Mastinu, Massimiliano Gobbi, Federico Ballo i Giorgio Previati. "Accelerated Testing of Brake Hoses for Durability Assessment". SAE International Journal of Commercial Vehicles 10, nr 1 (28.03.2017): 178–83. http://dx.doi.org/10.4271/2017-01-0389.

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Ma, J.-J., B.-D. Wu, X.-Y. Liu i J.-Y. Sun. "Compensation of inertia error in brake dynamometer testing". Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 224, nr 3 (17.12.2009): 355–59. http://dx.doi.org/10.1243/09544070jauto1272.

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Kumbhar, Bhau Kashinath, Satyajit Ramchandra Patil i Suresh Maruti Sawant. "A Comparative Study on Automotive Brake Testing Standards". Journal of The Institution of Engineers (India): Series C 98, nr 4 (17.06.2016): 527–31. http://dx.doi.org/10.1007/s40032-016-0289-y.

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Krishnapuram, Seetharam, Adithya Kameswara Rao, K. M. Dhivakar i Mayank Kapur. "Robotic arm for automatic brake testing and control". Journal of Physics: Conference Series 1831, nr 1 (1.03.2021): 012021. http://dx.doi.org/10.1088/1742-6596/1831/1/012021.

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Maulana, Fauzan Ilham, Noorsakti Wahyudi i Indah Puspitasari. "RANCANG BANGUN SISTEM REM MOBIL LISTRIK FUSENA". Jurnal Poli-Teknologi 18, nr 3 (7.11.2019): 243–48. http://dx.doi.org/10.32722/pt.v18i3.2342.

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The brake system is a device to slow down or stop the movement of the wheel automatically so that the vehicle will move slowly. This completeness in the vehicle is very important and vital because it functions as a safety for life in driving. In the process of making the Electric Car Fusena brake system has steps in the process, consists of size planning, materials used, designs realized, manufacturing brake system supporting components, assembly, installation and testing of brake systems. The Fusena Electric Car brake system use a disc-type hydraulic brake system with one brake master that can work simultaneous with dual circuit fluids (front and rear braking). The comparison of the brake pedal is changed to 3: 1, designing and recreating the caliper stand to make it more precise so that it gets maximum brake performance and is better than the system used before. Static testing of the Fusena Electric Car hydraulic brake system is done by positioning the vehicle on an inclined plane at a slope of 15 and 20 with a variable driver load of 40 kg, 50 kg, 60 kg and 70 kg. The test results are that the vehicle does not experience displacement or movement. And the results of the average dynamic test of the Brake System at a speed of 27.3 km/h with an average braking distance of 171 cm = 1.71 meters and the average deceleration time is 0.26 seconds.

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Ravindra, M. Aruna i Vardhan Harsha. "Performance Testing of Diesel Engine using Cardanol-Kerosene oil blend". MATEC Web of Conferences 144 (2018): 04005. http://dx.doi.org/10.1051/matecconf/201814404005.

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Awareness of environmental pollution and fossil fuel depletion has necessitated the use of biofuels in engines which have a relatively cleaner emissions. Cardanol is a biofuel, abundantly available in India, which is a by-product of cashew processing industries. In this study performance of raw Cardanol blended with kerosene has been tested in diesel engine. Volumetric blend BK30 (30% kerosene and 70% Cardanol) has been used for the test. The properties like flash point, viscosity and calorific value of the blend have been determined. The test was carried out in four stroke diesel engine connected with an eddy current dynamometer. Performance of the engine has been analysed by finding the brake specific fuel consumption (BSFC) and brake thermal efficiency (BTE). The results showed that the brake thermal efficiency of the blend is 29.87%, with less CO and smoke emission compared to diesel. The results were also compared with the performance of Cardanol diesel blend and Cardanol camphor oil blend, which were already tested in diesel engines by other researchers. Earlier research work reveals that the blend of 30% camphor oil and 70% Cardanol performs very closer to diesel fuel with a thermal efficiency of 29.1%. Similarly, higher brake thermal efficiency was obtained for 20% Cardanol and 80% diesel blend.

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Dąbrowski, Tomasz, Dariusz Kurczyński, Piotr Łagowski i Michał Warianek. "The influence of the brake pad surface machining and finishing on its friction performance- examined by inertia brake dynamometr testing". AUTOBUSY – Technika, Eksploatacja, Systemy Transportowe 19, nr 6 (30.06.2018): 399–404. http://dx.doi.org/10.24136/atest.2018.101.

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The article describes the influence of brake pads surface machining and finishing on their friction characteristics. It shows the methods of machining and finishing of the brake pads surface and their influence on noise emission and performance. It shows the brake dynamometer test results obtained on three brake pads which have three different types of surface modification and their detailed analysis and comparison.

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Kang, Jie, Jian Hui Di i Jin Peng Kang. "Study on a Testing Device of Automobile Brake Drum Running-In and Braking Force". Applied Mechanics and Materials 321-324 (czerwiec 2013): 1583–86. http://dx.doi.org/10.4028/www.scientific.net/amm.321-324.1583.

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This paper introduces a kind of testing device for automobile brake drum running-in stand and braking force, this device combines the existing car drum brake with braking force by means of increasing the frequency conversion speed control device and redesigning control system. Using this device will reduce the occupied site and realize the conversion between two functions in situ and save the operation time of function conversion. It can completely replace the original car drum brake running-in stand and braking force test bench.

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Zhang, Lilei, Zhipeng Huang, Chengwei Fu, Yuepeng Xu, Yunhe Wang i Xiangdong Kong. "Design and Verification of Two-Stage Brake Pressure Servo Valve for Aircraft Brake System". Processes 9, nr 6 (1.06.2021): 979. http://dx.doi.org/10.3390/pr9060979.

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Wheel braking devices is some of the most widely used landing deceleration devices in modern aircraft. Jet pipe pressure servo valves are widely used in large aircraft wheel brake control systems because of their high anti-pollution ability, high sensitivity and fast dynamic response. However, most brake systems suffer vibration phenomena during the braking process. The pressure servo valve is an important part of the hydraulic brake system, and also an important factor affecting the vibration of the system. In order to solve the vibration problem in the brake system this paper present a two-stage brake pressure servo valve design. We place feedback channels at both ends of the main spool to stabilize the output pressure. In addition, modeling, simulation and experimental verifications are carried out. Firstly, the principle and structure of the pressure servo valve are described. An accurate mathematical model of the two-stage brake pressure servo valve and the testing system is established. Then a simulation analysis is carried out. Finally, a two-stage brake pressure servo valve testing experimental platform system is built for experimental verification. The experimental results show that the mathematical model of the two-stage brake pressure servo valve and the test system established in this paper have high accuracy, and the designed servo valve structure can restrain vibrations. The above research results provide a useful theoretical reference for performance optimization, stability analysis and valve body structure improvement of brake pressure servo valves.

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Tjahjanti, Prantasi Harmi, Wibowo Harso Nugroho i Hana Catur Wahyuni. "Physics and Chemistry Test on Aluminum-Based Composite Materials as an Alternative Material for the Manufacture of Brake Drum". Advanced Materials Research 789 (wrzesień 2013): 449–54. http://dx.doi.org/10.4028/www.scientific.net/amr.789.449.

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One of the components of the vehicle are of particular interest is the brake system , because its main function is to stop the rotation axis, set the axis of rotation and to prevent unwanted rotation. One classification system is the brake drum that has been widely made of cast iron, cast iron and cast steel special. This study makes brake drum of composite materials aluminum-based, with reinforcement is silicon carbide (SiC), obtained optimum composition of 15%, so it is written (Al-Si)-SiC/15%. Physics testing includes testing of thermal conductivity and thermal expansion coefficient, and Chemistry testing the corrosion penetration rate when the test material was coating with regular polish, with chrome, with nickel and with nickel + chrome. The final results showed that the value of conductivity and thermal expansion coefficient of the composite material is lower than cast iron, aluminum and other alloys. That is pretty good heat resistance when applied to brake drum material. The lowest of corrosion penetration rate on coating material with a layer of Ni-Cr.

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Diep, Bao Tri, Hiep Le Dai, Duy Quoc Bui, Quoc Khai Tran, Minh Huy Huynh i Quoc Hung Nguyen. "Designing, Manufacturing and Testing the Cycling Training System Featuring Magnetorheological Brake". Applied Mechanics and Materials 889 (marzec 2019): 346–54. http://dx.doi.org/10.4028/www.scientific.net/amm.889.346.

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In this study, a dual-disc magneto-rheological brake (MRB) with two coils placed on each side housing is proposed for a cycling training system. The cycling training system is integrated a positioning system to simulate the cycling process in different slope ranging from 0 to 150. By adjusting position of the bicycle, braking torque of the brake, a cyclist can experience different riding condition such as riding on flat road or steep road with the slope up to 15o.

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Petersson, M. "Noise-related roughness of railway wheel treads-full-scale testing of brake blocks". Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 214, nr 2 (1.03.2000): 63–77. http://dx.doi.org/10.1243/0954409001531342.

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Results from full-scale tread braking experiments on an inertia dynamometer (brake testing machine) are presented. Eighteen prototypes of brake blocks are investigated. Two braking characteristics relating to the influence of the blocks on the wheel tread are studied: generation of hot spots and generation of roughness (corrugation, waviness). Wheel tread temperatures are measured during braking using an infrared (IR) technique. The wheel roughness is measured after each brake cycle when the wheel has cooled down. A roughness indicator, RλCA, relates measured roughness to expected rolling noise as generated by the wheel in operation. A correlation between the spatial distributions of temperatures and roughnesses is normally found: stronger for cast iron blocks and composition blocks and weaker for sinter blocks. The cast iron blocks are found to produce high tread roughness levels, partly owing to material transfer from brake block to wheel tread. The composition blocks are found to result in lower roughness levels than the cast iron blocks. Finally, the sinter metal blocks are found to lead to the lowest roughness levels, a fact which is probably due to the abrasive property of these blocks. Friction coefficients during braking are also measured.

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Sudarsono, Bambang, Hamid Nasrullah, Fanani Arif Ghozali i Aji Apri Setiawan. "Car Brake Works as Indicator Tool". Jurnal E-Komtek (Elektro-Komputer-Teknik) 5, nr 1 (29.06.2021): 133–41. http://dx.doi.org/10.37339/e-komtek.v5i1.559.

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Accidents caused by malfunctioning of the brake light system are increasing in line with the rise in road facilities. It provides space for drivers to drive vehicles quickly. To overcome this problem, a system that can signal the driver must rapidly identify the damaged brake lights. The purpose of this study was to produce a car brake indicator tool. This tool is an electronic device that functions to determine the brake light when one of the brake lights is off by automatically giving a signal on the car's dashboard. The method used to produce brake work indicator tools consists of designing, manufacturing, and testing. The testing process has been carried out through a lux meter, and the test variables include testing the use of electric current, voltage when the tool is working, and trying the performance of the device on the car. From testing this tool, the results obtained when the current usage of the tool is working, namely before the induction works of 2 amperes and when the induction works it is 0.5 amperes. The magnitude of the voltage when the device is used is 11.8 volts. Based on the experiments that have been carried out, there are no disturbances in the lighting system or other systems on the car when this tool is working. This tool can work well to provide convenience and comfort when driving by car. Based on the experiments that have been carried out, there are no disturbances in the lighting system or other systems on the vehicle when this tool is working. This tool can work well to provide convenience and comfort when driving by car. Based on the experiments that have been carried out, there are no disturbances in the lighting system or other systems on the vehicle when this tool is working. This tool can work well to provide convenience and comfort when driving by car.

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Vdovin, Alexey, i Gaël Le Gigan. "Aerodynamic and Thermal Modelling of Disc Brakes—Challenges and Limitations". Energies 13, nr 1 (1.01.2020): 203. http://dx.doi.org/10.3390/en13010203.

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The brake system is a critical component for any passenger vehicle as its task is to convert the kinetic and potential energy of the vehicle into heat, allowing the vehicle to stop. Heat energy generated must be dissipated into the surroundings in order to prevent brake overheating. Traditionally, a lot of experimental testing is performed to ensure correct brake operation under all possible load scenarios. However, with the development of simulation techniques, many vehicle manufacturers today are looking into partially or completely replacing physical experiments by virtual testing. Such a transition has several substantial benefits, but simultaneously a lot of challenges and limitations need to be addressed and understood for reliable and accurate simulation results. This paper summarizes many of such challenges, discusses the effects that can and cannot be captured, and gives a broader picture of the issues faced when conducting numerical brake cooling simulations.

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Yi, Ze Quang, i Pan Nan. "Research of Multi-Channel Vehicle Brake Performance Testing System". Applied Mechanics and Materials 644-650 (wrzesień 2014): 1144–48. http://dx.doi.org/10.4028/www.scientific.net/amm.644-650.1144.

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For the outstanding problems of traditional vehicle foundation braking performance testing systems’ such as lacking of test & analysis methods, inflexible and not easy to carry, a multi-channel Vehicle foundation break performance testing system based on CompactRIO embedded platform and LabVIEW was developed. The system design concept and concrete implementation of the key technologies such as parallel acquisition and data transmission, large data processing and time-frequency noise reduction were all introduces in detail. Actual break test experiment shows the effectiveness and reliability of the system.

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Van Wittenberghe, J., W. Ost i P. De Baets. "Testing the Friction Characteristics of Industrial Drum Brake Linings". Experimental Techniques 36, nr 1 (29.11.2010): 43–49. http://dx.doi.org/10.1111/j.1747-1567.2010.00675.x.

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Barth, Karl E., Gregory K. Michaelson, Adam D. Roh i Robert M. Tennant. "Field Determined Live Load Distribution Factors for Modular Press-Brake-Formed Tub Girders". Transportation Research Record: Journal of the Transportation Research Board 2675, nr 3 (9.01.2021): 1–7. http://dx.doi.org/10.1177/0361198120983757.

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This paper is focused on the field performance of a modular press-brake-formed tub girder (PBFTG) system in short span bridge applications. The scope of this project to conduct a live load field test on West Virginia State Project no. S322-37-3.29 00, a bridge utilizing PBFTGs located near Ranger, West Virginia. The modular PBFTG is a shallow trapezoidal box girder cold-formed using press-brakes from standard mill plate widths and thicknesses. A technical working group within the Steel Market Development Institute’s Short Span Steel Bridge Alliance, led by the current authors, was charged with the development of this concept. Research of PBFTGs has included analyzing the flexural bending capacity using experimental testing and analytical methods. This paper presents the experimental testing procedures and performance of a composite PBFTG bridge.

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Guntoro, Guntoro, Ingrid Ovie Yosephine i Simon Simanjuntak. "PEMANFAATAN SERAT PELEPAH KELAPA SAWIT SEBAGAI BAHAN PEMBUATAN KAMPAS REM SEPEDA MOTOR". Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) 10, nr 2 (16.06.2021): 155. http://dx.doi.org/10.23960/jtep-l.v10i2.155-160.

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Brake pads are generally made of asbestos, which is less environmentally friendly and widely available in nature, therefore motorcycle brake pads are made that utilize palm frond fibers filled with alumina powder and bonded to a polyurethane matrix. This research was conducted at the Laboratory of Material Testing of Industrial Chemical Technology Polytechnic (PTKI) Medan. Research was carried out from February-July 2020, using two test, namely the Rockwell Hardness level test and the Pin On Disk Friction Coefficient test. The result showed that oil palm frond fibers can be made into motorcycle brake pads with the addition of alumina powder according to the predetermined composition. After going through the test, the Rockwell hardness level was obtained in A2 treatment (6% Alumina) with the highest and best hardness level, namely 52.75 Kg. And after testing the friction coefficient of the Pin On Disk type, brake pads from palm frounds with the addition of alumina powder composition which have the lowest coefficient value of the best are obtained in treatment A2 (6% Alumina) with a value of 0.000765 N/mm2. Keywords : biocomposite, brake shoes, palm fround fibers, alumina powder

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Surojo, Eko, Wijang Wisnu Raharjo, Jamasri i Aditya Utama. "Characterization of Commercial Automotive Brake Pad Materials". Applied Mechanics and Materials 842 (czerwiec 2016): 36–42. http://dx.doi.org/10.4028/www.scientific.net/amm.842.36.

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In automotive parts market, there are two classes of commercial brake pad that are original equipment manufacturer (OEM) and aftermarket (Non-OEM spare part). In manufacturing of commercial brake pad materials, the difference of ingredient or concentration used is important because of differences in characteristics and cost. It is well known that the OEM brake pads are more expensive than the Non-OEM brake pads. In this study, the OEM and the Non-OEM of passenger car brake pad were evaluated in order to obtain a comparison of friction characteristics, composition, and microstructure between them. The OEM and the Non-OEM brake pad were purchased, cut out to form specimen, and then evaluated to obtain material characteristics. Specimens were subjected to friction testing using pin on disc machine and microstructure examinations. The results show that the OEM brake pad material has lower and more stable in coefficient of friction than the Non-OEM brake pad material. The OEM brake pad material also has more wear resistance than the Non-OEM brake pad material. Examinations using SEM/EDS show that the OEM brake pad material contains metallic fillers that are Cu and Fe, on the other hand, the Non-OEM brake pad material does not contain metallic filler. The Non-OEM brake pad material uses asbestos as reinforcement.

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Kchaou, Mohamed, Amira Sellami, Jamal Fajoui, Recai Kus, Riadh Elleuch i Frédéric Jacquemin. "Tribological performance characterization of brake friction materials: What test? What coefficient of friction?" Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 233, nr 1 (25.03.2018): 214–26. http://dx.doi.org/10.1177/1350650118764167.

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This article describes and explains the tribological tests and methods for the evaluation of the performance of the brake friction materials. It starts by discussing the particularities of these materials and the variation of characterization tests, which can experimentally simulate many aspects of brake situation but with a large field of tribo-test, from standard to specific protocol. Examples of preparation, procedures, instrumentation, and analysis results for the tribological aspect testing ranging from the scale of vehicle braking performance (by methods including inertia dynamometers, Krauss testing, friction assessment screening test, and Chase testing) to simplified test using reduced-scale prototypes for small-sample friction, are explained. A particular attention is attributed to the discussion of the viability of the friction coefficient report in relation to the material properties and brake compound performance. At the end of this article, the guarantee of the performance output or ranking evaluated by such experimental methods is discussed.

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Yu, Liangyao, Liangxu Ma i Jian Song. "Design, testing and analysis of a novel automotive magnetorheological braking system". Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 231, nr 10 (13.11.2016): 1402–13. http://dx.doi.org/10.1177/0954407016674394.

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This paper presents a new approach to the design, testing and analysis of a magnetorheological brake which uses a multi-path magnetic circuit to satisfy the braking demand of vehicles. In contrast with a general braking system, an automotive brake exhibits an outstanding performance for high torques and long reaction times. We use a proposed power-law model and finite element analysis to obtain the magnetorheological braking performance for a high shear rate and a high-intensity magnetic field. Finite element analysis with different structures is adopted to determine the parameters of the magnetorheological braking and the layout of the magnetic circuits. An integrated prototype is also fabricated and tested. The test results show that the brake torque is relatively high, and the torque can be accurately controlled by the input current. The reaction time is less than 100 ms. We also analyse the experimental results and use these as the basis for fabricating a full-sized prototype. The full-sized prototype generally exhibits a high torque capacity and a fast dynamic response, thereby validating the feasible application of magnetorheological fluids in automotive braking.

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Wager, Guido, Jonathan Whale i Thomas Braunl. "Performance evaluation of regenerative braking systems". Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 232, nr 10 (17.11.2017): 1414–27. http://dx.doi.org/10.1177/0954407017728651.

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This research evaluates the energy gain from a regenerative braking system (RBS) in a commercial electric vehicle (EV), the OEM Mitsubishi i-MiEV. Measurements were conducted in a controlled environment on a commercial chassis dynamometer using international drive cycle standards. The energy recovery of the vehicle was modelled and the output of the model was compared with results from the chassis dynamometer driving. The experiments were original as they coupled changes in energy recovered and driving range due to the RBS settings with investigations into the time of use of the friction brake. Performance tests used two different drive cycle speed profiles and various RBS settings to compare energy recovery performance for a broad range of driving styles. The results show that due to reduced energy consumption, the RBS increased the driving range by 11–22% depending on RBS settings and the drive cycle settings on the dynamometer. The results further showed that driving an EV with a RBS uses the friction brakes more efficiently, which will reduce brake pad wear. This has the potential to improve air quality due to reduced brake pad dust and reduces the maintenance costs of the vehicle. The findings were significant since they showed that friction time of use, a parameter neglected in RBS testing, plays an important part in the efficient operation of an EV. The overall results from the vehicle energy recovery modelling showed good agreement with the data from drive cycle testing and the model has potential to be further developed to gain greater insight into vehicle RBS braking behaviour for EVs in general.

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Grigoratos, Theodoros, Carlos Agudelo, Jaroslaw Grochowicz, Sebastian Gramstat, Matt Robere, Guido Perricone, Agusti Sin i in. "Statistical Assessment and Temperature Study from the Interlaboratory Application of the WLTP–Brake Cycle". Atmosphere 11, nr 12 (2.12.2020): 1309. http://dx.doi.org/10.3390/atmos11121309.

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The relative contribution of brake emissions to traffic-induced ambient Particulate Matter (PM) concentrations has increased over the last decade. Nowadays, vehicles’ brakes are recognised as an important source of non-exhaust emissions. Up to now, no standardised method for measuring brake particle emissions exists. For that reason, the Particle Measurement Programme (PMP) group has been working on the development of a commonly accepted method for sampling and measuring brake particle emissions. The applied braking cycle is an integral part of the overall methodology. In this article, we present the results of an interlaboratory study exploring the capacity of existing dynamometer setups to accurately execute the novel Worldwide Harmonised Light-Duty Vehicles Test Procedure (WLTP)–brake cycle. The measurements took place at eight locations in Europe and the United States. Having several dynamometers available enabled the coordination and execution of the intended exercise, to determine the sources of variability and provide recommendations for the correct application of the WLTP–brake cycle on the dyno. A systematic testing schedule was applied, followed by a thorough statistical analysis of the essential parameters according to the ISO 5725 standards series. The application of different control programmes influenced the correct replication of the cycle. Speed control turned out to be more accurate and precise than deceleration control. A crucial output of this interlaboratory study was the quantification of standard deviations for repeatability (between repeats), sample effect (between tests), laboratory effect (between facilities), and total reproducibility. Three critical aspects of the statistical analysis were: (i) The use of methods for heterogeneous materials; (ii) robust algorithms to reduce the artificial increase in variability from values with significant deviation from the normal distribution; and (iii) the reliance on the graphical representation of results for ease of understanding. Even if the study of brake emissions remained out of the scope of the current exercise, useful conclusions are drawn from the analysis of the temperature profile of the WLTP–brake cycle. Urban braking events are generally correlated to lower disc temperature. Other parameters affecting the brake temperature profile include the correct application of soak times, the temperature measurement method, the proper conditioning of incoming cooling air and the adjustment of the cooling airspeed.

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Wang, Ren Guang, Bin Wang i Han Wen Sun. "Experiment Analysis on Transient Braking Factor of Drum Brake". Advanced Materials Research 152-153 (październik 2010): 159–63. http://dx.doi.org/10.4028/www.scientific.net/amr.152-153.159.

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To find transient braking factor changing model affected by its three main operation factors. A type of drum brake of passenger car was taken as the testing object, a series of practical tests were conducted in brake dynamometers with combination of orthogonal and recursive methods, a formula described transient friction coefficient of drum brake was deduced from test data on the basis of three main factors which are pressure, speed and temperature, which can reflect the drum brake’s performance changing condition influenced by three main factors.

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