Patent ID: 7813848
Filing Date: 2010-10-12
Classification: B60K,B60L,B60W,H02M,Y02T,Y10S

Abstract:
1. A control system for a hybrid vehicle, said hybrid vehicle including a generator adapted to be driven by an internal combustion engine and a vehicle-driving motor adapted to drive road wheels, and having a specific electric-power supply mode for supplying an alternating current generated by said generator, to said vehicle-driving motor without AC-to-DC-to-AC conversion, said control system comprising: a current conversion device interposed in a current-conversion-device line electrically connecting said generator and said vehicle-driving motor, and adapted to be operated based on an electric power supplied from a battery so as to change an amplitude or a frequency of an alternating current generated by said generator; required motor output determination unit adapted to determine a required output of said vehicle-driving motor in conformity to a required vehicle-driving force; electric-power supply control unit adapted to determine a current waveform of an AC electric power to be supplied to said vehicle-driving motor, in conformity to said required output of said vehicle-driving motor, and controllably determine a strategy of how to supply said AC electric power; and a bypass line adapted to electrically connect said generator and said vehicle-driving motor in such a manner as to bypass said current conversion device, wherein said electric-power supply control unit is operable, when there is a substantial waveform difference between a current waveform required for said vehicle-driving motor and a current waveform output from said generator, in said specific electric-power supply mode, to supply an AC electric power from said generator to said vehicle-driving motor via said current-conversion-device line so as to eliminate said waveform difference through said current conversion device, and, when there is no substantial waveform difference between said current waveforms and thereby an equilibrium waveform conversion is performed in said current conversion device, in said specific electric-power supply mode, to supply an AC electric power from said generator to said vehicle-driving motor via said bypass line without mediation of said current conversion device.