For fulfilling actual requirements of developing Parallel hybrid electric vehicles (PHEVs)
mathematical model of powertrain is designed and the powertrain is simulated by computer in order to evaluate vehicle performance. A calculating method of equivalent oil consumption has been found on SAE2711 standard. Based on simulation software
fuel consumption and driving performance of different mechatronic topology PHEVs are compared and analyzed. And its result will guide development of trial-producing prototype PHEV bus.