Jatco Corporation

Tochigi Fuji Sangyo Kabushiki Kaisha

Kouichi Iizuka

Yukiyoshi Inuta

Akihiro Yamamoto

Takayuki Okuda

Kazuaki Aota

Masao Teraoka

Rico Resch

Nobushi Yamazaki

Joerg Mueller

Naoki Kobayashi

Peter Tenberge

Jörg Müller

Yoshiaki Kato

An automatic transmission including a single-pinion first planetary gearset having a first sun gear, a first ring gear and a first pinion carrier, a double-pinion second planetary gearset having a second sun gear, a second ring gear and a second pinion carrier, a single-pinion third planetary gearset having a third sun gear, a third ring gear and a third pinion carrier, an input shaft always connected to the first sun gear, an output shaft always connected to the first pinion carrier, the third sun gear always kept in a fixed state, the first ring gear and the second sun gear which are always connected to each other, the second and third ring gears which are always connected to each other, and six friction elements, at least eight forward speeds and one reverse speed being respectively established by simultaneous engagement of two friction elements selected from the six friction elements.

Automatic transmission

An automatic transmission comprising: a first planetary gearset of a double pinion; a second planetary gearset of a single pinion; a third planetary gearset of the single pinion, first sun gear and second sun gear being at all times linked together to constitute a first rotary member and second ring gear and third sun gear being at all times linked together to constitute a second rotary member; an input shaft; an output shaft; a first frictional element; a second frictional element; a third frictional element; a fourth frictional element; a fifth frictional element; a sixth frictional element, the six frictional elements being appropriately released or engaged to make a gear shift to a gear shift stage of at least eight forward speeds and, from among the six frictional elements, a combination of simultaneous engagements of three frictional elements achieving at least eight forward speed and one reverse speed.

A coupling for a vehicle includes a pilot clutch , a main clutch , a pressing system and a coupling mechanism . The pilot clutch generates a pilot torque and is operated by operating means . The main clutch connects torque members and and transmits transmitted torque. The coupling mechanism operated by the pilot torque converts the pilot torque into a pressing force for coupling the main clutch via the pressing system by use of a cam thrust force thereof. The main clutch is disposed outside the pilot clutch in a radial direction, and respective members of the pressing system are mutually positioned and designed to move unitarily in a pressing direction, thus sliding portions caused by the main clutch is connecting and disconnecting are limited to being on a side of the main clutch

Coupling for vehicle

Growing community of inventors

Fuji, Japan

Kouichi Iizuka