HYBRID VEHICLE CONTROL SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a hybrid vehicle control system capable of improving fuel consumption performance in a case of warming up catalyst by controlling engine power so that the engine power is equal to constant target engine power.SOLUTION: A control system 12 of a hybrid vehicle 10 comprises: a controller 32 that controls driving of an engine 18 and a second MG 24 that is a traveling motor in response to a vehicle output request; and catalyst 38 for exhaust emission control. The controller 32 controls engine power so as to be equal to constant target engine power at a time of catalyst warm-up request, and sets an engine rotational speed at the time of controlling the engine power so as to be equal to the constant target engine power to a first engine rotational speed lower than a lower limit engine rotational speed at which the engine 18 operates in the case except for the case of controlling the engine power so as to be equal to the constant target engine power.