System for controlling start clutch of automatic transmission

Details System for controlling start clutch of automatic transmission System for controlling start clutch of automatic transmission

1986-04-07

1988-01-12

Bonck, Rodney H.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

192 0076, 192109F, B60K 4128, F16D 4328

Patent

active

047185252

ABSTRACT:
A control system for controlling a fluid pressure to engage a start clutch of a vehicular automatic transmission has an actuator such as a solenoid valve for varying the fluid pressure supplied to the start clutch, a group of sensors for sensing one or more operating conditions of the vehicle and producing a start signal representing a start of the vehicle, and a controller such as a microcomputer for controlling the fluid pressure by sending a control signal to the actuator. In order to ensure a smooth start of the vehicle from a standing position in which the start clutch is disengaged, the controller varies the value of the control signal upon receipt of the start signal in such a manner that the control signal rises immediately, then falls rapidly to a low value, and finally increases gradually from the low value to an ultimate value.

REFERENCES:
patent: 3722646 (1973-03-01), Oguma
patent: 3809201 (1974-05-01), Miyanishi et al.
patent: 3991865 (1976-11-01), Komatsu
patent: 4086994 (1978-05-01), Hirosawa et al.
patent: 4476745 (1984-10-01), Moan
patent: 4487303 (1984-12-01), Boneri et al.
patent: 4513638 (1985-04-01), Nishikawa et al.
patent: 4603604 (1986-08-01), Nishikawa et al.

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