Automatic change gear control means

Details Automatic change gear control means Automatic change gear control means

1988-07-20

1989-12-05

Braun, Leslie A.

192 clutches and power-stop control

Transmission control and clutch control

Common control

192 0092, 192 351, 192 358, 74330, 74336R, B60K 2016

Patent

active

048846678

ABSTRACT:
In an automatic transmission for obtaining a necessary transmission gear ratio by disposing a plurality of gear trains on an input shaft 8 and an output shaft 19 which are parallel to each other, the present invention disposes two electromagnetic multiple-disk clutches C.sub.1 (or C.sub.2) and C.sub.5 (transmitting torque varying means) between the input shaft 8 and the output shaft 19 so that a torque is borne by the electromagnetic multiple-disk clutch C.sub.5 to make a shift operation at the time of shift-up and the torque is borne by the electromagnetic multiple-disk clutches C.sub.1 (or C.sub.2) and C.sub.5 to make the shift operation at the time of shiftdown. Accordingly, the torque from the engine can always be kept applied to the output shaft 19 during the gear change operation, and the occurrence of non-transmission of torque as well as the shock resulting from clutch connection can be prevented. For this reason, the gear change operation can be made smoothly without giving the feel of power loss and speed loss to the driver. The present invention can be practiced by adding only two electromagnetic multiple-disk clutches to a conventional automatic transmission and by utilizing commonly all other components of the conventional automatic transmission.

REFERENCES:
patent: 2991661 (1961-07-01), Rambausek
patent: 3691861 (1972-09-01), Sturmer
patent: 4463621 (1984-08-01), Fisher
patent: 4497222 (1985-02-01), Nagaoka et al.
patent: 4519484 (1985-05-01), Nagaoka et al.
patent: 4579015 (1986-04-01), Fukui
patent: 4658663 (1987-04-01), Hiraiwa
patent: 4677880 (1987-07-01), Hattori et al.

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