Aisin Aw Industries Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Aisin Aw Co., Ltd.

Aishin Aw Co., Ltd.

Yoshito Takeshita

Masahiro Yamaguchi

Fumiaki Doseki

Masashi Hattori

Takeshi Inuzuka

Atsushi Tabata

Yutaka Taga

Yasuo Hojo

Masato Kaigawa

Takayuki Okada

Masaaki Yamaguchi

Taku Suzuki

Masahiro Hayabuchi

Shuzo Moroto

Kazuyuki Suzuki

Katsunori Tanaka

Tsutae Takeda

Tomohiro Yamashita

Yukihiro Fukuda

Takanori Wakasugi

Tetsuya Onaga

Masahito Inaba

Kouji Maeda

A damper includes an outer cover having a front cover and a rear cover. The covers are joined to form a lubricant oil accommodation chamber for accommodating liquid. A damper device, a limiter mechanism, a first plate including a first collar portion located toward the front of the limiter mechanism, and a second plate including a second collar portion located toward the rear of the limiter mechanism are arranged in the outer cover. The limiter mechanism includes a first limiter plate, which is an input side on the torque transmission path, a second limiter plate, which is an output side on the torque transmission path, and a limiter disc spring, which presses the limiter plates.

Damper having torque limiter function

A torsional damper includes a torque limiter and a damper. The torque limiter includes at least two friction members, allows transmission of torque, and prohibits transmission of excessive torque. The damper absorbs torsional vibration through resilient deformation of a spring. The torque limiter is a wet torque limiter in which the friction members are arranged in an oil chamber filled with lubricating oil. The damper is a dry damper in which the spring is not immersed in the lubricating oil.

Torsional damper

A clutch assembly for starting a vehicle without using a torque converter has a simple structure yet providing high reliability. In the clutch assembly, a clutch and a damper device are housed in a housing connected to a crank shaft of an engine. A boss serving as an output member is connected to an input shaft of an automatic transmission. An output of the engine is connected/disconnected to/from the input shaft upon engagement/disengagement of the clutch. The clutch includes a friction member and a piston fit oil tightly with the housing so as to apply pressure to the friction member. One end of the damper device is connected to a clutch hub, and the other end is connected to the output member. The clutch and the damper device are aligned on the axis of the housing.

Clutch assembly

A control system for an automatic transmission including a fluid transmission unit and a lockup clutch arranged in the fluid transmission unit. A running state sensor(s) detects the running state of the vehicle and outputs signals to an electronic control unit for deciding a shift and outputting a shift signal and for deciding lockup clutch ON/OFF and outputting a lockup ON/OFF signal. A hydraulic control unit selectively actuates a plurality of solenoid valves, in response to the output signals from the electronic control unit, to selectively apply/release a plurality of frictional engagement elements, to establish a new gear stage, and the lockup clutch. The electronic control unit (ECU) has stored in memory therein, a lockup diagram having a first hysteresis region defined by a lockup OFF line and a first lockup ON line, and a second hysteresis region defined by a second lockup ON line formed in the first hysteresis region and the first lockup ON line. The ECU compares the output signals of the running state sensor(s) against the lockup diagram to decide lockup clutch OFF, if the running state is in a region below the lockup OFF line, lockup clutch ON, if the running state is over the first lockup ON line, and lockup clutch ON if the running state is in the second hysteresis region. The ECU also outputs a lockup signal to a predetermined one of the solenoid valves to apply/release the lockup clutch in accordance with the results of the comparison.

First and second hysteresis zones for shift and lock-up control system

A shift control system for an automatic transmission, comprising a shift unit for selecting by manipulating a shift lever an automatic shift mode, in which a gear stage is determined on the basis of a running state of a vehicle, and a manual shift mode in which a gear state is determined from an output signal based on the manipulation. The shift unit has a drive range capable of setting a plurality of forward gear stages and a plurality of range positions arrayed and includes: a first shift path for guiding the shift lever into the range positions; a second shift path intersecting the first shift path for guiding the shift lever; two third shift paths formed at the two end portions of the second shift path, the third shift paths having at their individual end portions gear stage positions for indicating the forward gear stages in the automatic shift mode and for guiding the shift lever; and a manual shift instructor for outputting a signal instructing a gear stage corresponding to the gear stage position when the shift lever is moved to the gear stage position. The shift control system comprises a gear stage setter for setting the gear stage which is instructed by the output signal of the manual shift instructor.

Shift control system for manually shiftable automatic transmission

A shift control system for an automatic transmission, includes: a plurality of frictional engagement elements adapted to be hydraulically engaged for setting a plurality of gear stages; and a shift lever for switching between an automatic mode, in which a gear stage is set on the basis of the running state of a vehicle, and a manual mode in which a gear stage is selected by manipulating the shift lever. A shift detector detects that a gear stage should be selected for the shift in the manual mode state and a shift start timing adjuster, if the shift in the manual mode state is detected, the switching rate of the frictional engagement elements which are switched for executing the detected shift.

Growing community of inventors

Echizen, Japan

Yoshito Takeshita