Automotive Hybrid Engine Assist System

An automotive hybrid engine assist system comprising a generator-motor that is coupled to an internal combustion engine of an automotive vehicle so as to act as a motor to assist the internal combustion engine during idling standby, and so as to be driven by the internal combustion engine to generate three-phase alternating-current power after idling standby is released, a turbocharger which comprises a rotary machine that is mounted coaxially onto the rotating shaft, an inverter that is connected, by means of wiring, to three-phase power terminals of the generator-motor and three-phase power terminals of the rotary machine and an electric power direction change-over switch that is disposed in a path of the wiring, and switches connection of the inverter to the generator-motor or to the rotary machine.