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Research on Comparison and Relevancy of Automobile Brake Performance Test Methods

Author: XiaoJing
Tutor: LiJun
School: East China Jiaotong University
Course: Vehicle Engineering
Keywords: Braking performance Brake Tester Detect Adhesion coefficient Relevance
CLC: U467.4
Type: Master's thesis
Year: 2011
Downloads: 81
Quote: 0
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Abstract


Vehicle braking performance is one of the main performance of the car, it will directly impact on car speed performance of the play, while the relationship between road traffic safety. Therefore, the vehicle braking performance is an important factor in the impact of safe driving, car run safety an important indicator of the technical conditions and will review the project. In order to be able to make more accurate vehicle braking performance evaluation, the the existing braking performance detection method research based on theoretical modeling and real vehicle detection example calculation combination of vehicle braking performance various detection methods researched. First, the introduction of the detection method of the braking performance of bench and a road test, and the basic structure of the detection device, the detection parameters, the detection principle. Bench detection method, compared road test detection method, expand further based on comparative analysis of the main differences between the Bench and road test. Secondly, this article will be detected when the opposite force roller brake tester is divided into three cases, and the mechanical model. The experimental data obtained using real vehicle testing organizations, model validation and analysis. And the use of a mechanical model analyzes the influencing factors of the test results of the braking force. Then, on the flat plate brake tester for mechanical modeling, theoretically be able to detect the maximum braking force. The combination of real vehicle detection, and compare the results and the actual results of theoretical calculations and analysis of the similarities and differences between the two, and then discussed and analyzed the impact factors of a flat-plate brake tester detects braking force test results. Finally, the relationship between the braking force and braking distance, to establish a correlation between the Bench braking performance testing and road test braking performance detection both; drum and flatbed mechanical model, two detection The correlations between the results, the same real vehicle detection and two examples to verify the accuracy of relational. The analysis of the research show that: the detection of drum brake reaction force performance is mainly affected by the adhesion coefficient was seized wheel drum, non-test the adhesion coefficient between the wheels and the ground, the drum structure, two of the adhesion coefficient test results affect the relative large; factors and test results of the impact of a flat-plate brake tester adhesion coefficient between the wheel and test-bed flat detection when the brake pedal force, where the adhesion coefficient greater impact; association between detection methods style, and after the experiment to verify the correctness of the relational makes comparability between detection methods, provide some theoretical guidance for the further evaluation of vehicle braking performance, and provide help for the actual testing work.

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CLC: > Transportation > Road transport > Automotive Engineering > Vehicle test > Parameters of the instruments and technology
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