Toyota Jidosha Kabushiki Kaisha

Yoshisuke Kametani

Hiroki Takeda

Toshio Suzuki

Takashi Seo

Michio Yoshida

Kenji Matsuo

Kyohei Suzumura

Makoto Sawada

Satoshi Kamijo

Takaaki Ito

Shinya Kuwabara

Shun Minaki

Mitsuru Oba

Ken Jozaki

A dog clutch of a vehicle power transmission device includes a sleeve, the dog clutch connecting/disconnecting a first rotating shaft to/from a first gear by moving the sleeve between a neutral position at which inner circumferential teeth formed on an inner circumferential side of the sleeve are not meshed with outer circumferential teeth on a side surface side of the first gear and an engagement position at which the inner circumferential teeth are meshed with the outer circumferential teeth, the inner circumferential teeth and the outer circumferential teeth having inclined surfaces tooth thicknesses of which become larger as the inner circumferential teeth and the outer circumferential teeth approach each other, and when the sleeve is moved to an engagement position by a shift fork, the sleeve being held in contact with a side surface of the first gear.

Dog clutch of vehicle power transmission device

A control apparatus for a synchronous meshing mechanism that is equipped with a gear, a sleeve, a synchronizer ring, and a hydraulic actuator is provided. When it is determined that the sleeve and the gear have been rotationally synchronized with each other in an engagement transition period of the synchronous meshing mechanism, an electronic control unit with which the control apparatus is equipped sets a command pressure for the hydraulic actuator to an intermediate pressure that is lower than a meshing completion pressure. Besides, when meshing has not been completed even after the lapse of a predetermined time from a timing when the command pressure for the hydraulic actuator is set to the intermediate pressure, the electronic control unit sets the command pressure for the hydraulic actuator to the meshing completion pressure.

Control apparatus for synchronous meshing mechanism

A control apparatus for a vehicle drive-force transmitting apparatus including a dog clutch that is operated by an actuator to selectively connect and disconnect a drive-force transmitting path. In process of switching of the dog clutch from released state to engaged state, the control apparatus determines whether a rotational speed difference of the dog clutch is equal to or larger than a given difference value when a sleeve of the dog clutch is positioned on an engaging side of a synchronizing position for placing the dog clutch into the engaged state, and stops the switching of the dog clutch to the engaged state and causes the actuator to place the dog clutch back into the released state, when determining that the rotational speed difference is equal to or larger than the given difference value with the sleeve being positioned on the engaging side of the synchronizing position.

Control apparatus for vehicle drive-force transmitting apparatus

In a control device of a vehicle including a first power transmission path transmitting a power through a belt-type continuously variable transmission and a second power transmission path transmitting a power through a reduction gear mechanism in parallel between an input shaft and an output shaft and including a dog clutch in series with the reduction gear mechanism in the second power transmission path, when the dog clutch is in an engagement transition state and a rotational speed change of the output shaft is equal to or greater than a predetermined value, the engagement transition state of the dog clutch is canceled to release the dog clutch.

Control device of vehicle

It is provided a control device of a vehicle drive apparatus in a vehicle including an electric motor for driving drive wheels, the control device controlling an output torque of the electric motor in accordance with a predetermined electric motor torque control characteristic making the output torque of the electric motor larger when a requested drive force is greater such that a drive force of the vehicle becomes equal to the requested drive force requested by a driver, wherein when the stopped vehicle is started, if the requested drive force is equal to or less than a requested drive force judgment value set equal to or less than a necessary start-up drive force necessary for start-up of the vehicle, the control device provides electric motor torque suppression control suppressing the output torque of the electric motor below an output torque determined from the electric motor torque control characteristic.

Control device of vehicle drive apparatus

Growing community of inventors

Nagoya, Japan

Yoshisuke Kametani