Study on resistance setting method for chassis dynamometer test of Hybrid Electric Bus

Comparison of running resistance generated from on-road coasting tests and recommended calculation was analyzed in this paper. Using coefficient and multipoint setting methods, chassis dynamometer tests of Hybrid Electric Bus (HEB) were carried out to simulate on-road running resistance according to coasting test data. Test results show that the average relative error between coasting test results and computational resistance is larger than 9%, so road coasting test can not be replaced by any other calculating methods. The maximum relative error between coasting test resistance and simulated results is less than 3%.