Hybrid vehicle control device

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.