Starting control apparatus for hybrid vehicle

摘要

A starting control apparatus for a hybrid vehicle capable of stabilizing and controlling the amount of torque transmitted by the clutch during engine start up. The hybrid vehicle includes a first clutch disposed between an engine and a motor/generator, and an engaging pressure is supplied to the first clutch from a line pressure regulating valve to a line pressure circuit into which a mechanical oil pump delivers operating fluid. A starting control section that performs the starting control in which the clutch is engaged, torque is input to the engine, and the engine is started in response to an engine start request while traveling in EV mode, is provided with a start determining section that executes starting control when the transmission input torque input to a belt-type continuously variable transmission exceeds a preset input torque based on the operating fluid pressure.

主权项

1. A starting control apparatus for a hybrid vehicle, comprising:
a first clutch disposed in a drive transmission system for transmitting a driving force of an engine to a drive wheel, the first clutch being configured to selectively connect and disconnect the transmission between the engine side and the drive wheel side; a motor disposed in the drive transmission system on the side of the drive wheel with respect to the first clutch for selectively outputting the driving force to the drive transmission system, the motor being configured to output the driving force in the engaged state of the first clutch to thereby start the engine; an automatic transmission interposed between the motor and the drive wheel; a mechanical pump that is driven by the motor to deliver operating hydraulic fluid to the automatic transmission via a line pressure circuit; a control valve disposed in the line pressure circuit to increase the operating hydraulic pressure of the line pressure circuit in accordance with increase in an input torque to the automatic transmission; a starting control section that is configured to perform an engine starting control for starting the engine by inputting a torque from the motor with the first clutch engaged in response to an engine start request by the driving force of the motor in an EV driving mode; and a start determining section that is contained in the starting control section, the start determining section being configured to calculate the transmission input torque representing the input torque to the automatic transmission and to perform the engine starting control when the transmission input torque exceeds a preset input torque determined based on the operating hydraulic pressure.