Control device for hybrid vehicle

摘要

A start operation is continuously performed until the internal combustion engine starts even when an accelerator pedal opening decreases between initiation and termination of the start operation of the internal combustion engine, and an EV mode is selected again. A motor/generator is controlled such that a torque of the motor/generator exerting to reduce a slippage of the second clutch increases as the accelerator pedal opening decreases during control of the second clutch to start the internal combustion engine, compared to a case where the accelerator pedal opening does not decrease during mode switching.

主权项

1. A control device for a hybrid vehicle having an internal combustion engine as a power source, a motor/generator as a power source, a first clutch interposed between the internal combustion engine and the motor/generator and capable of changing a transfer torque capacity continuously or stepwise, and a second clutch interposed between the motor/generator and the drive wheel and capable of changing a transfer torque capacity continuously or stepwise, so as to select a drive mode between an electric vehicle mode in which a vehicle is driven only using power from the motor/generator by releasing the first clutch and engaging the second clutch and a hybrid electric vehicle mode in which a vehicle is driven using power from both the internal combustion engine and the motor/generator by engaging both the first and second clutches,
the control device comprising: a first-clutch engagement control unit configured to engage the first clutch when a mode switches to the hybrid electric vehicle mode from the electric vehicle mode; a second-clutch engagement control unit configured to slip-engage the second clutch when the internal combustion engine starts using the first-clutch engagement control unit; and a motor/generator control means configured to increase a torque of the motor/generator exerting to reduce a slippage of the second clutch as an accelerator pedal opening decreases while the second clutch is controlled to start the internal combustion engine for switching from the electric vehicle mode to the hybrid electric vehicle mode, compared to a case where the accelerator pedal opening does not decrease during the slip-engagement.