Automatic transmission start-up clutch control system

Details Automatic transmission start-up clutch control system Automatic transmission start-up clutch control system

1982-12-27

1984-12-11

Krizmanich, George H.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

192 0076, 192 0092, 192 358, 3644241, 74866, B60K 4128

Patent

active

044873034

ABSTRACT:
The start-up clutch of an automatic transmission is pressurized from a source of fluid pressure and vented through operation of a solenoid-operated clutch actuator valve. Operating parameters of the engine and transmission, the size of the throttle angle and setting of the PRNDL gear selector are continuously monitored, read and the valves stored for use in calculating the value of a duty cycle determined in accordance with control equations appropriate to the specific mode in which the driveline is operating. A driver circuit converts the duty cycle to a pulse width modulated waveform, which is used to electronically open and close an electrical circuit of which the solenoid winding is an element.

REFERENCES:
patent: 4081065 (1978-03-01), Smyth et al.
patent: 4172505 (1979-10-01), Rabus et al.
patent: 4200175 (1980-04-01), Dick
patent: 4231092 (1980-10-01), Grob
patent: 4244244 (1981-01-01), Rembold et al.
patent: 4343387 (1982-08-01), Hofbauer

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