CONTROL APPARATUS FOR A HYBRID VEHICLE DRIVE SYSTEM

摘要

A control apparatus for a hybrid vehicle drive system, which includes an drive control portion configured to control a first electric motor to generate a negative torque only after a determination that a clutch and a brake have been placed in engaged states, when the hybrid vehicle drive system is switched from a state wherein at least one of the clutch and the brake is placed in a released state, to a state wherein a negative torque is generated by the first electric motor while the clutch and the brake are both placed in the engaged states. The control apparatus permits reduction of a risk of reversal of an operating direction of an engine when the hybrid vehicle drive system is switched from one of drive modes other than a drive mode in which the clutch and the brake are both placed in the engaged states, to the drive mode.

主权项

1. A control apparatus for a hybrid vehicle drive system including: a differential device which comprises a first differential mechanism and a second differential mechanism and which comprises four rotary components; and an engine, a first electric motor, a second electric motor and an output rotary member which are respectively connected to said four rotary components,
and wherein relative rotating speeds of said four rotary components are represented by a collinear chart in which a vertical line representing a rotating speed of a third rotary component configured to receive an output of said engine is located between a vertical line representing a rotating speed of a first rotary component connected to said first electric motor, and a vertical line representing a rotating speed of a second rotary component connected to said output rotary member, said hybrid vehicle drive system further including a coupling element configured to selectively connect said third rotary component to a stationary member, said control apparatus comprising: a first electric motor drive control portion configured to control said first electric motor so as to generate a negative torque after a determination that said third rotary component has been connected to said stationary member through said coupling element, when the hybrid vehicle drive system is switched from a state wherein said third rotary component is not connected to said stationary member through said coupling element, to a state wherein the negative torque is generated by said first electric motor while said third rotary component is connected to said stationary member through said coupling element.