Development of mild hybrid system for diesel railcar

Generally in Japan, the diesel railcar used in non-electrified section is powered by diesel engine, and propulsion power is transmitted to wheels by hydraulic transmission. So the diesel railcar cannot use regenerative brake like electric railcar. But the reduction of energy consumption is demanded in late years. We developed mild hybrid system for diesel railcar from the energy transmission efficiency point of view, use regenerative electric power to auxiliary devises. we confirmed the effect of this system both running test and simulation.