Toyota Jidosha Kabushiki Kaisha

Aisin Ai Co., Ltd.

Michiaki Nakao

Makoto Ohmori

Shinji Ogawa

Masaya Michishita

Takao Ohi

A vehicle drive force control apparatus for controlling a drive force of a vehicle including: a main drive power source for driving main drive wheels through a coupling device and a transmission, an electric generator operated by a drive force generated by the main drive power source, and an electric motor which is driven by electric power generated by the electric generator, to generate a drive torque that can be transmitted to auxiliary drive wheels. The vehicle drive force control apparatus controls the coupling device and transmission to reduce an engaging force of the coupling device and shift up the transmission during driving of the auxiliary drive wheels, so that the operating speed of the main drive power source is raised according to a load of the coupling device, while the electric power generated by the electric generator is increased, permitting an increase of the drive torque of the auxiliary drive wheels and stable 4-wheel-drive control.

Vehicle drive force control apparatus

A shifting device for a synchromesh-type transmission is designed to detect an accurate change of the input rotation of each area of the shifting operation, and to set the applying load to the shifting fork based on the change of input rotation. The shifting device for a synchromesh-type transmission includes a detecting device for detecting a rotation change rate of an input shaft, a judging device for judging a balk point based on the rotation change rate of the input shaft detected by said detecting device, and a transmission controlling mechanism including an electric-controlled driving device for driving a shift actuator to shift the shift fork. The driving device controls a drive current to the shift actuator when the balk point is detected by the judging device.

Growing community of inventors

Toyota, Japan

Michiaki Nakao