Patent ID: 7957855
Filing Date: 2011-06-07
Classification: B60K,B60L,B60W,H02P,Y02T

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 first electric energy supply mode for directly supplying an alternating current generated by said generator, to said vehicle-driving motor, said control system comprising: required motor output determination section operable to determine a required output of said vehicle-driving motor in conformity to a required vehicle power; required generator output determination section operable to determine a required output of said generator in conformity to said required output of said vehicle-driving motor; required engine output determination section operable to determine a required output of said engine in conformity to said required output of said generator; and waveform-difference correction section operable, in response to occurrence of a waveform difference between a current waveform required for said vehicle-driving motor and an output current waveform of said generator due to a change in said required output of said vehicle-driving motor, to perform a waveform-difference correction operation in a direction for eliminating said waveform difference; wherein said vehicle-driving motor includes a permanent magnet embedded in a rotor to allow a magnet torque and a reluctance torque to be generated variably depending on a current phase angle, and includes phase-angle setting section operable, when said vehicle-driving motor is driven in said first electric energy supply mode, to set said current phase angle at a first phase angle which is shifted by a predetermined value from a second phase angle where a sum of said magnet torque and said reluctance torque is maximized, and wherein said waveform-difference correction operation includes a self-correction operation in which, when said current phase angle is deviated from said first phase angle due to the occurrence of said waveform difference, said vehicle-driving motor autonomously operates to shift said deviated current phase angle in a direction for returning to said first phase angle, so as to serve as at least a part of said waveform-difference correction section.