Method and system for testing sliding resistance of pure electric vehicles

Abstract

The invention discloses a method and system for testing the sliding resistance of pure electric vehicles. The method comprises the following steps of: installing a tested vehicle on a four-wheel-driven chassis dynamometer and preheating the tested vehicle; controlling the tested vehicle in a stalled state; controlling the tested vehicle to run at a first speed; after a preset time, progressively increasing or decreasing the first vehicle speed according to a preset difference value and controlling the tested vehicle to run constantly at the first progressively increased or decreased speed until the first speed reaches a preset threshold; acquiring the wheel side speed and the first wheel side resistance of the tested vehicle constantly running at the current speed in real time, and generating a corresponding relationship between the vehicle sliding resistance and speed of the vehicle in a power-down test according to the wheel side speed and the first wheel side resistance. The method and system achieve a function of testing the sliding resistance of pure electric vehicles. The test method is safe and controllable and high in repeatability, guarantees the accuracy of a test result and a simple whole testing process.

Description

technical field [0001] The invention relates to the technical field of pure electric vehicles, in particular to a method and system for testing the sliding resistance of pure electric vehicles. Background technique [0002] The current pure electric drive vehicle industry usually adopts the vehicle sliding method of road test to obtain the vehicle sliding distance, and uses it as the standard for evaluating the vehicle sliding resistance. The method of measuring the sliding distance in the road test is intuitive, simple and easy to measure, but the test value of the sliding test is affected by rolling resistance and wind resistance, resulting in low controllability and sensitivity of the detection parameters, which reduces the contrast and repeatability of the test; and The sliding distance is only for the evaluation of the overall performance of the vehicle, and it is impossible to obtain the distribution and variation of the resistance of the transmission system components...

AI Technical Summary

Problems solved by technology

The method of measuring the sliding distance in the road test is intuitive, simple and easy to measure, but the test value of the sliding test is affected by rolling resistance and wind resistance, resulting in low controllability and sensitivity of the detection parameters, which reduces the contrast and repeatability of the test; and The sliding distance is only for the evaluation of the overall performance of the vehicle, and it is impossible to obtain the distribution and variation of the resistance of the transmission system components in the pure electric drive, and then it is difficult to improve the performance of the transmission system in a targeted manner. Experiments cannot add various influences in actual working conditions to it

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