Controller for hybrid vehicle

摘要

A hybrid vehicle controller controls a start or a stop of an engine according to a heating requirement or an engine-warming requirement. When at least one of the heating requirement and the engine-warming requirement is generated and a state of charge (SOC) of a main battery is higher than a specified threshold, the controller performs an SOC-fall-control to drop an SOC of a main battery. When the SOC of the main battery falls to a specified value, the engine is restarted. Since the engine can be started in a state where the SOC is lower enough than the upper limit by performing the SOC-fall-control, the engine output power can be converted into the heat for heating the passenger compartment or warming-up the engine.

主权项

1. A controller for a hybrid vehicle equipped with an engine, a motor-generator generating an electric power with a driving force of the engine, a main battery charging the electric power which the motor-generator generates, and an electric heater for heating a passenger compartment, the main battery discharging the electric power to the motor-generator and the electric heater, wherein an exhaust heat of the engine is utilized for heating the passenger compartment or warming-up the engine,
the controller comprising: a portion controlling a start and a stop of the engine according to a heating requirement; a portion performing an SOC-fall-control in which a state of charge of the main battery is lowered when the heating requirement is generated and the state of charge of the main battery is higher than a specified threshold; and a portion starting the engine when the state of charge of the main battery falls to a specified engine-start state of charge of the main battery, wherein when the SOC-fall-control is performed, the electric heater is energized for heating the passenger compartment without starting the engine, and when the state of charge of the main battery falls to the specified engine-start-state of charge of the main battery, the engine is started for heating the passenger compartment in cooperation with the electric heater.