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Research on System of Automobile Sliding Resistance Testing

Author: MengXiangYan
Tutor: SuJian
School: Jilin University
Course: Vehicle Operation Engineering
Keywords: Automobile Sliding Performance Sliding Resistance Testing System Automation
CLC: U467.4
Type: Master's thesis
Year: 2011
Downloads: 81
Quote: 1
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Abstract


When automobile sliding, the engine power is stopped, then the inertial force is the equivalent of automotive power source. The longer the distance of automobile sliding, the less the sliding resistance and the less fuel consumption which indicated that the sliding performance is better. Automobile sliding performance affects automobile dynamic performance and fuel economy. The main factors than affect the automobile sliding performance are transmission system, running system and braking system, by testing these factors the sliding resistance can be analyzed, thus reflecting the automobile sliding performance.According to the requirements in the national standard, the main testing methods are road test, the chassis dynamometer test and sliding resistance test. The road test has strict requirements on the road condition and weather as well as the driver’s driving skill, so this testing method is rarely used in testing station. The chassis dynamometer test requires reasonable choice of inertia flywheel, besides, the testing result need to be amended in the end. The sliding resistance test method detects automobile by means of sensors, and the whole process is finished by people which result in huge error. So, the current detecting stations use the estimated value as the detecting result.The testing method in GB18565-2001 "the serve vehicles comprehensive performance and detection method" and the practical testing show that the sliding resistance testing is the most economic and simple method, but there is still no mechanical, intelligent detection sliding equipment for sliding resistance detection.According to the development status of automobile testing and the evaluation method of automobile sliding performance, this paper developed the testing system of automobile sliding resistance, and experiment results confirmed that the method is reasonable and practical. The main content and conclusion is summarized as follows:1. Outlined the automobile testing and the development status of the automobile sliding performance testing both at home and abroad and then analyzed the importance of the automobile sliding performance testing.2. Analyzed the current method of the automobile sliding performance testing, which including road test sliding distance testing, chassis dynamometer testing and labor testing on sliding resistance. Compared and evaluated the variety of testing methods.3. Tested and analyzed the influential factors of automobile sliding performance.4. Developed automobile sliding resistance testing system, calculated and checked the key parts, and selected the reasonable sensor and the electromagnetic clutch. The system uses the electric motors and hardware equipment in brake bench which not only make the testing equipment multifunctional, but also save space of the testing station.5. Compared the labor sensor and sliding resistance testing system, and obtained the conclusion that the sliding resistance testing system has high accuracy and stability.6. Analyzed the errors during the testing process, and gave the fault verification process of unqualified automobile.

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