Jtekt Corporation

Toyoda Koki Kabushiki Kaisha

Toyota Jidosha Kabushiki Kaisha

Isao Ito

Kunihiko Suzuki

Hiroshi Takuno

Kyosuke Haga

Noriyuki Fujii

Tsuyoshi Murakami

Hiroaki Asano

Minoru Onitake

Yasushi Yamada

Hisaaki Wakao

Ryouhei Shigeta

Ryouichi Kubo

Kiyotaka Kinoshita

A driving force transmission apparatus includes: a pinion gear shaft having a pinion teeth portion, a first shaft portion extending from one side of the pinion teeth portion, and a second shaft portion extending from the other side of the pinion teeth portion; a ring gear meshing with the pinion teeth portion; a clutch housing capable of rotating relative to the pinion gear shaft on a rotation axis in coincidence with a rotation axis of the pinion gear shaft; a clutch mechanism located between the clutch housing and the first shaft portion of the pinion gear shaft; and a differential carrier accommodating the ring gear. The first shaft portion and the second shaft portion of the pinion gear shaft are supported by a first bearing and a second bearing, respectively. The clutch housing is supported by the pinion gear shaft through a third bearing fitted on the first shaft portion.

Driving force transmission apparatus and four-wheel drive vehicle

A torque distributing apparatuscomprises a differential gear unit, a planetary gear setarranged between first and second output shaftsL andR, a motordriving the planetary gear set, and a speed change gear setcompensating a speed change ratio of the planetary gear set. The planetary gear setand the speed change gear setare arranged coaxially outward of the first output shaftL. The motoris arranged coaxially outward of the planetary gear setand the speed change gear set

Torque distributing apparatus

A four-wheel drive vehicle is provided with a drive power transmission device for controlling the connection degree of a front wheel axle driven by an engine with a rear wheel axle. A drive power distribution control device is responsive to a vehicle speed, a rotational difference between front wheels driven by the front wheel axle and rear wheels driven by the rear wheel axle, a throttle opening degree signal and the like and controls the drive power transmission device. The drive power distribution control device judges whether the vehicle is beginning to start or not and at the starting of the vehicle, controls the transmission rate of the drive power transmission device in dependence on the state or manner in which the vehicle is beginning to start.

Drive power distribution control method and device for four-wheel drive vehicle

A driving power transmission device having a clutch provided between a first shaft and a second shaft relatively rotatable to each other for transmitting a driving power is provided, wherein a housing to which the first shaft is connected and a piston provided in the housing for actuating the clutch define a cylindrical space in order to receive a plurality of blades rotatable with the second shaft. High viscous fluid is filled within the cylindrical space defined by the housing and the piston. Each of the blades has a convexly curved side surface and a concavely curved side surface located at opposite sides in rotational direction. When the first shaft rotates faster than the second shaft, the convexly curved side surfaces of the blades compulsorily displaces the high viscous fluid within the space in order to generate a pressure actuating the clutch through the piston. In this forward torque transmission, the tranmissive torque becomes relatively large. When the first shaft rotates slower than the second shaft, the concavely curved side surfaces of the blades compulsorily displace the high viscous fluid in order to generate a pressure for actuating the clutch. In this reverse torque transmission, the transmissive torque becomes smaller than that in the forward torque transmission.

Driving power transmission device

Growing community of inventors

Iwakura, Japan

Isao Ito