HYBRID VEHICLE AND CONTROL METHOD THEREFOR

摘要

In a hybrid vehicle, a criterion temperature for locking a first electric motor/generator is set to a first temperature when the engine is in a reduced-cylinder operation. The criterion temperature is set to a second temperature that is lower than the first temperature, when the engine is in an all-cylinder operation. If the temperature of the first electric motor/generator is higher than the criterion temperature, the first electric motor/generator is set to a locked state.

主权项

1. A hybrid vehicle comprising:
an engine having a plurality of cylinders; an electric motor/generator; an output mechanism configured to transfer torque to a driving wheel; a differential mechanism configured to distribute torque from the engine to the electric motor/generator and the output mechanism; a lock mechanism configured to switch between a lock state that prevents rotation of the electric motor/generator and a release state that permits rotation of the electric motor/generator; and a controller configured to switch between a reduced-cylinder operation and an all-cylinder operation, at least one of the plurality of cylinders being deactivated and the remaining cylinders being activated in the reduced-cylinder operation, all the plurality of cylinders being activated in the all-cylinder operation, the controller being configured to switch the lock mechanism from the release state to the lock state when temperature of the electric motor/generator is higher than a predetermined temperature, the controller being configured to set a first temperature as the predetermined temperature when the engine executes the reduced-cylinder operation, and the controller being configured to set a second temperature lower than the first temperature as the predetermined temperature when the engine executes the all-cylinder operation.