Abstract
On the basis of the actual bus driving data, a series hybrid power system including 4 motors was designed for the transit bus. Then, city route driving for the supposed bus was operated on a bench dynamometer tester and a static charge-discharge tester. As a result, it was clarified that the charge-discharge electric loss was only about 10 % of the generated electric energy on board, and the energy efficiency of the supposed power system was estimated as 1.7-2 times that of conventional engine traction systems for route buses.
