A dynamic and static vertical loading device for electric wheel performance testing test bench

Abstract

The present invention aims at the problems existing in the separate static vertical load loading device and the separate dynamic vertical load loading device of the test bench, and provides a dynamic and static vertical loading device for the electric wheel performance test test bench, which can realize static Vertical load loading can also realize dynamic vertical load loading. Through the combination of dynamic loading and static loading, it can accurately simulate the change of vertical load of electric wheels caused by factors such as acceleration and deceleration of the whole vehicle during road driving. , where the static loading device is used to simulate the basic load of the electric wheel during driving, which is equal to the minimum vertical load in the entire experimental condition, and the rest is simulated by the dynamic loading device, which can make the dynamic load simulation part smaller and reduce Minimize the torque capacity requirements of the dynamic load-loaded motor, which can effectively improve the load simulation accuracy, reduce the control difficulty, reduce the power consumption of the test bench, and effectively save the test bench cost and test cost.

Description

technical field [0001] The invention relates to the field of electric vehicle test benches, more specifically, it relates to a dynamic and static vertical loading device for electric wheel performance test benches. Background technique [0002] With the increasing number of automobiles in China and the increasingly serious problems of energy security and environmental pollution, new energy vehicles have become one of the main directions of China's automobile technology development; in the past ten years, new energy vehicles have contributed to energy conservation and emission reduction. Significantly, with the gradual maturity of existing key technologies of new energy vehicles and the further deterioration of environmental problems, people's requirements for energy conservation of new energy vehicles are also gradually increasing, which can be seen from the evolution of national support policies; for example, in 2009, At the beginning of the era of new energy vehicle indust...

AI Technical Summary

Problems solved by technology

[0004] While the electric wheel electric vehicle brings the above advantages, it also brings the following problems: after the electric wheel is adopted, the unsprung mass of the vehicle changes greatly, so the change of the vertical load of the wheel has a great impact on the vehicle performance of the hub motor electric vehicle Therefore, whether it can accurately simulate the change of the vertical load of the wheel during the driving process of the real vehicle becomes the key to testing the performance of electric wheels and electric vehicles with electric wheels.

[0005] At present, there are mainly two types of simulations on the test bench for the vertical load of the wheels: static simulation and dynamic simulation: when the car is running in a straight line at a uniform speed on a good level road, the vertical loads of the four wheels remain basically unchanged, so the simulation on the test bench The vertical force on the wheels can be loaded by static load; when the car accelerates and decelerates, the load transfer between the axles will change the vertical force on the front and rear wheels of the car, that is, the vertical load on the front wheels will decrease during acceleration. The vertical load on the front wheels increases during deceleration; when the car is turning or driving on uneven roads, the vertical load on the wheels will also change; if the static loading method is still used on the test bench at this time, the wheels on the test bench The force on the wheel does not match the force on the real road, which will affect the authenticity of the performance test results; the dynamic loading device generally uses a motor and a series of transmission parts for loading, if the dynamic loading device is used to apply the vertical load to the wheel, In the case of a large load, the control accuracy and response speed of the load will be greatly reduced. If the control accuracy of the load is greatly improved by improving the performance of the motor, there will be a problem of high cost.

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