Patent ID: 6554736
Filing Date: 2003-04-29
Classification: B60K,B60W,F16D,F16H,Y02T,Y10S,Y10T

Abstract:
A hybrid vehicle control device comprising:an engine capable of temporary stoppage control in a prescribed operating condition; a gear-change mechanism connected with an output shaft of said engine and whereby its output rotation is changed in gear ratio; a driving force transmission system that transmits the output of said gear-change mechanism to driven wheels; an electrically driven motor capable of driving said driven wheels and connected to said driving force transmission system; and means for engagement/disengagement arranged in a path from the output shaft of said engine to said driving force transmission system and that perform engagement/disengagement control of said path, said control device being arranged such that running drive can be performed by transmission of the output of said engine to said driven wheels through said gear-change mechanism and said power transmission system by engagement of said means for engagement/disengagement and running drive can be performed by transmission of driving force of said electrically driven motor to said driven wheels in a condition with said means for engagement/disengagement released, wherein said hybrid vehicle control device further comprises auxiliary means for engagement control that, when abnormality of said gear-change mechanism is detected, is capable of engaging said means for engagement/disengagement without being affected by said abnormality, and such that, when, in a condition with said means for engagement/disengagement released, running drive is performed by transmitting the driving force of said electrically driven motor to said driven wheels, if abnormality is detected, said means for engagement/disengagement is engaged by said auxiliary means for engagement control and running is effected by driving said engine instead of said electric motor, wherein said means for engagement/disengagement comprise hydraulic pressure type means for engagement/disengagement that perform engagement/disengagement control using hydraulic pressure force, said auxiliary means for engagement control comprise an engagement/disengagement control valve that controls hydraulic pressure supply and cut-off for engagement/disengagement control of said hydraulic means for engagement/disengagement, and auxiliary means for supplying hydraulic pressure capable of supplying hydraulic pressure for engagement/disengagement control to said means for engagement/disengagement when supply of hydraulic pressure to said means for engagement/disengagement is cut off by said engagement/disengagement control valve, and said control device being arranged such that, in a condition with supply of hydraulic pressure to said means for engagement/disengagement cut off by said engagement/disengagement control valve, supply of engagement/disengagement control hydraulic pressure to said means for engagement/disengagement can be performed by said auxiliary means for supplying hydraulic pressure, if abnormality is detected.