Wind resistance analysis method based on road sliding resistance test
A technology of sliding resistance and analysis method, which is applied in the direction of vehicle testing, machine/structural component testing, measuring devices, etc., which can solve the problems of Scx acquisition difficulty and long cost cycle, so as to improve research and development capabilities, high precision, and low cost Effect
Inactive Publication Date: 2020-12-04
DONGFENG MOTOR CORP HUBEI
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Problems solved by technology
[0007] The technical problem to be solved by the present invention is to provide a wind resistance analysis method based on the road sliding resistance test for evaluating the real wind resistance of the vehicle on the road, and to solve the problems of difficulty in obtaining Scx and large cost cycle in view of the defects in the prior art
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[0050] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0051] Such as figure 1 As shown, a wind resistance analysis method based on road sliding resistance test includes the following steps:
[0052] 1) Collection of vehicle test and analysis parameters; monitoring and collection of tire pressure data; vehicle parameters include vehicle curb weight, test quality, tire model and rolling radius;
[0053] 2) Test preparation; prepare a test sample car and multiple sets of tires;
[0054] 3) Carry out the road sliding test, record the vehicle speed v and time t corresponding to the road test operating point in turn, and obtain the sliding resistance of the whole vehicle at each s...
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The invention discloses a wind resistance analysis method based on a road sliding resistance test. The method comprises the following steps of: 1) performing test preparation: preparing a to-be-testedsample vehicle and multiple groups of tires; 2) testing the whole vehicle and monitoring analysis parameters; 3) performing a road sliding test to obtain the sliding resistance of the whole vehicle at each speed point of each group of tires; 4) measuring the rolling resistance corresponding to each vehicle speed point when the vehicle slides; 5) measuring the internal resistance of a transmissionsystem at each speed point; 6) acquiring air resistance and Scx: according to the sliding resistance and the rolling resistance of the whole vehicle and the internal resistance of the transmission system, calculating the air resistance of the ith group of tire vehicles during road sliding, obtaining the product of the wind drag coefficient and the windward area of each speed point of the slidingsample vehicle; and 7) performing wind resistance analysis according to the product of the wind resistance coefficient and the windward area of each speed point of the sliding sample vehicle. The windresistance analysis method gives consideration to both accuracy and cost effectiveness, and can reflect the real wind resistance level of the vehicle on the road.
Description
technical field [0001] The invention relates to vehicle performance parameter testing technology, in particular to a wind resistance analysis method based on road sliding resistance test. Background technique [0002] When the vehicle slides in neutral on the road, the resistance it receives mainly includes air resistance, rolling resistance and vehicle internal resistance. The air resistance is proportional to the square of the vehicle speed. When the vehicle is running at a constant speed of 80km / h on a level road, the air resistance suffered by the vehicle accounts for more than 60% of the total running resistance. Therefore, the air resistance of the vehicle directly affects its power and economic performance. [0003] The size of air resistance (ie wind resistance) mainly depends on the product Scx (Scx=Cd×A) of the drag coefficient and the windward area. This is also the direction of wind resistance optimization. In the development and design process of passenger c...
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Login to View More IPC IPC(8): G01M17/007
CPCG01M17/007
Inventor 滕培智吴艳华韦于刚黎浩王振
Owner DONGFENG MOTOR CORP HUBEI