Detection method for simulating full load brake performance of automobile via bench test loading
A detection method and automobile technology, applied in the direction of measuring device, vehicle test, machine/structural component test, etc., can solve the technical situation that is difficult to achieve unified specifications, does not meet the requirements of dynamic inter-axle braking force distribution, and cannot meet the braking requirements. Efficiency and other issues
Active Publication Date: 2015-11-11
常熟东南高新技术创业服务有限公司
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Problems solved by technology
The disadvantages of the above methods are: simple simulation of vehicle full-load static axle load loading detection, no reasonable detection of the required braking force in equal proportions to the designed braking force of each axle, it is difficult to achieve a unified standard for the technical status of the brakes of each axle; The dynamic inter-axle braking force distribution requirements required for driving braking cannot meet the best braking performance of a fully loaded vehicle
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Embodiment Construction
[0015] Taking a two-axle in-use truck with a total weight of 90,000N and a curb weight of 45,930N as an example to calculate and simulate full-load brake detection with no load, the specific implementation of the test method for the bench test loading simulated vehicle full-load brake performance is illustrated. The static front axle load of an unloaded vehicle is 21160N, and the rear axle load is 24820N. Assume that the design or statistical distribution ratio of the braking force between the front and rear axles of the medium-sized truck is about 4:6, and the limit of the total braking force of the full load is not less than 0.5×90000= 45000N, calculate the ratio of total weight to curb weight η = 90000 / 45930 = 1.96, if it is stipulated that when η is greater than 1.8, it is necessary to test the braking performance by loading the axle load on an unloaded vehicle platform. Reasonably determine the required braking force and load on the front and rear axles in proportion.
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The invention relates to a detection method for simulating the full load brake performance of an automobile via bench test loading. According to the method, the automobile is placed on a roller counterforce type brake bench, and the brake performance is detected by simulating the dynamic axle load detection, in which the full-load driving brake heavy load moves forwardly, via the zero load static automobile state. According to the design or calculated distribution proportion of axel braking forces of the type of detected automobile, the whole braking force of the prescribed full load automobile is deposited into required braking forces Fi required by each axle, or G is deposited into loading axle loads Gi of different axles, and it is ensured that the loading axle load is not lower than Fi / theta. The maximal braking force and the braking force balance of wheels are determined in the pull-down stable loading axle load, non-locking of the wheels can be used detect the real braking force of the wheels usually, serious defects of zero-load automobile detection are overcome, and the braking safety during driving of the full load automobile can be ensured.
Description
technical field [0001] Bench test loading simulates the full-load braking performance detection method of a car, which is a method for testing the braking performance of an unloaded car on a roller reaction brake table by loading the detection shaft to increase the axle load and simulating the braking dynamic axle load of the full-load car. , belongs to the technical field of automobile performance bench test detection. Background technique [0002] There are usually the following loading methods for testing the braking performance of an in-use vehicle in the current technical bench test: (1) The loading weight of the vehicle makes it reach a static full-load state detection. (2) Apply pressure to the top of the vehicle or add tension to the measured axle to simulate the full static axle load of the vehicle. (3) After the multi-axle vehicle adopts the power mechanism to lift the drum brake table, use the weight of other non-detected axles to raise the axle to be inspected t...
Claims
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Inventor 吴明
Owner 常熟东南高新技术创业服务有限公司