Toyota Jidosha Kabushiki Kaisha

Yasuhiro Maeda

Toshinari Suzuki

Hideharu Nohara

In a control apparatus for a powertrain that includes an automatic transmission, occurrence of slip in a one-way clutch is determined when one gear is formed if a first rotation member and a second rotation member of the one-way clutch rotate relatively. If slip in the one-way clutch is detected, it is determined whether the rotational speed difference between the first rotation member and the second rotation member has increased. If the rotational speed difference between the first rotation member and the second rotation member has increased when slip is detected in the one-way clutch, a control is executed to engage a predetermined frictional engagement element.

Powertrain control apparatus and method, and program for implementing the control method

A hybrid motor vehicle includes a differential having a differential mechanism equipped with a first rotating element that is connected to an engine, a second rotating element that is connected to a first electric motor and a third rotating element connected to both a second electric motor and a transfer member; and a transmission provided in a power transmission path, extending from the transfer member to driven wheels, that establishes a plurality of transmission ranges by selectively operating a plurality of coupling devices. An irreversible rotation member connected to a non-rotation member against reverse rotation through a one-way clutch is provided in the transmission. When the second electric motor is malfunctioning, an engine start control unit starts the engine by driving the first electric motor while selectively engaging the coupling devices to connect the transfer member to the irreversible rotation member.

Growing community of inventors

Toyota, Japan

Yasuhiro Maeda