关键词: 底盘测功机；车轮惯量；油耗；万有特性

Abstract: In order to improve the testing accuracy of the entire vehicle when conducting fuel consumption tests on a single axle chassis dynamometer, non driving wheel inertia tests are conducted on the chassis dynamometer based on the entire vehicle. The test values are used instead of empirical values, and the fuel consumption results are compared to verify the impact of using non driving theoretical inertia test values to load the results during fuel consumption testing. First, the chassis dynamometer is used to test the wheel inertia of the vehicle to obtain the load mass of the vehicle on the chassis dynamometer. Secondly, the universal characteristic of the vehicle are tested to obtain the fuel consumption of the vehicle at different engine speeds and powers. Then, through the universal characteristics of the whole vehicle, the fuel consumption in China heavy-duty commercial vehicle test cycle (CHTC) and China-World transient vehicle cycle (C-WTVC) under different wheel inertia (experience value and test value) are simulated and checked by the universal characteristics of the whole vehicle, and the fuel consumption difference between the test value and the experience value of the wheel inertia is finally obtained. The results show that the test accuracy of the single-axle chassis dynamometer can be effectively improved by using the test value of wheel inertia.

Key words: Chassis dynamometer; Wheel inertia; Fuel consumption; Universal characteristic