Automatic transmission and direct coupling clutch for vehicle

Details Automatic transmission and direct coupling clutch for vehicle Automatic transmission and direct coupling clutch for vehicle

1983-06-27

1985-08-20

Herrmann, Allan D.

Machine element or mechanism

Gearing

With fluid drive

74866, 192 0092, 192 358, 192 33, F16H 4700, F16H 4502

Patent

active

045356521

ABSTRACT:
This invention relates to an automatic transmission for a vehicle comprising a torque convertor equipped with a rotary member on the input side and a rotary member on the output side; a semi-direct coupling clutch interposed between both of the rotary members, actuated by a control fluid pressure and capable of mechanically transmitting the torque between both of the rotary members while permitting the slip of rotation therebetween; an auxiliary transmission operatively connected to the torque convertor and adapted to effect the speed change operation in accordance with speed change ratios of a plurality of transmission stages; and a control apparatus for controlling the interconnecting force of the semi-direct coupling clutch in such a manner that the force becomes greater when the auxiliary transmission is operating at the speed change ratio of a higher transmission stage and becomes lower when the auxiliary transmission is operating at the speed change ratio of a lower transmission stage.

REFERENCES:
patent: 3948367 (1976-04-01), Weinrich et al.
patent: 4002228 (1977-01-01), Borman
patent: 4090417 (1978-05-01), Burcz et al.
patent: 4259882 (1981-04-01), Miller
patent: 4428467 (1984-01-01), Hiramatsu

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