Device for controlling hybrid vehicle

摘要

When the amount of heat stored in a heat storage container is greater than or equal to a determination value at the time of initiation of system start-up in a hybrid vehicle, heating by thermal energy stored in the heat storage container is carried out only on an internal combustion engine. This increases the engine temperature to a permitting temperature for intermittent control of the engine or higher, so that the intermittent control is executed at an early stage after the initiation of the system start-up in the hybrid vehicle. Also, oil viscosity in the engine is rapidly lowered to decrease the resistance to operation of the engine. If the amount of the heat stored in the heat storage container is less than the determination value, the heating by the thermal energy stored in the heat storage container is performed on the transaxle under a prescribed condition. As a result, the fuel efficiency of the engine is improved.

主权项

1. A control device for a hybrid vehicle having an internal combustion engine and a motor as drive sources, the hybrid vehicle being capable of performing drive-by-motor operation in which the engine is stopped and only the motor is operated as the drive source, the control device carrying out an intermittent control, in which, when an engine temperature is greater than or equal to a permitting temperature, the drive-by-motor operation is performed on condition that a prescribed executing condition is satisfied, and the control device prohibiting execution of the intermittent control when the engine temperature is less than the permitting temperature, the control device comprising:
a transaxle in which the motor, a generator, and an inverter are mounted; a storage device for storing energy produced through the operation of the engine after initiation of system start-up in the vehicle; a heating device for heating at least one of the engine and the transaxle using the energy stored in the storage device at the time of the initiation of the system start-up in the vehicle; and a control section for controlling the heating device to perform heating on the engine using the energy stored in the storage device when the engine temperature can be raised to the permitting temperature or higher through the heating by the energy at the time of the initiation of the system start-up in the vehicle.