Control device of hybrid vehicle

摘要

A control device of a hybrid vehicle includes an engine and an electric motor, a clutch, and an automatic transmission. The motor is the only drive power source when the clutch is released. The control device is configured such that when a request for increasing drive torque while the motor is running is made, if start control of the engine and downshift control of the automatic transmission overlap, clutch engagement completion is a starting point to start a rotational change of an input rotation speed of the transmission toward a synchronous rotation speed after a shift, and a transmission torque capacity during the downshift control in the transmission until engagement completion of the clutch being set equal to or greater than an input torque of the transmission during the motor running and less than an input torque of the transmission at the time of engagement completion of the clutch.

主权项

1. A control device of a hybrid vehicle including an engine and an electric motor as a drive power source for running, a clutch connecting/disconnecting a first power transmission path between the engine and the electric motor, and an automatic transmission coupled to the electric motor in a power transmittable manner to transmit power from the drive power source for running toward drive wheels, the hybrid vehicle being configured to perform motor running using only the electric motor as the drive power source for running with the clutch released, the control device comprising:
a drive torque increase request determining portion being configured to determine whether a request for increasing a drive torque is made during the motor running: a hybrid control portion being configured to engage the clutch and perform start control of the engine when the request for increasing the drive torque during the motor running is made; and a shift control portion configured to perform downshift control of the automatic transmission when the request for increasing the drive torque during the motor running is made, the shift control portion being configured such that when the downshift control of the automatic transmission is performed along with the start control of the engine, engagement completion of the clutch is used as a starting point to start a rotational change of an input rotation speed of the automatic transmission toward a synchronous rotation speed after a shift, and a transmission torque capacity during the downshift control in the automatic transmission until engagement completion of the clutch being set equal to or greater than a first input torque of the automatic transmission during the motor running and less than a second input torque of the automatic transmission at the time of engagement completion of the clutch.