Variable capacity control apparatus for an automotive torque con

Details Variable capacity control apparatus for an automotive torque con Variable capacity control apparatus for an automotive torque con

1990-02-12

1991-03-12

Lorence, Richard

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

74890, 475 65, F16H 4502, F16H 6114

Patent

active

049986040

ABSTRACT:
The torque capacity of a torque converter clutch is controlled with a two-state directional valve and a single solenoid operated pressure control valve. In operation, the directional valve is spring biased to a release state in which converter feed pressure is directed to a passage between the clutch plate and the converter input shell to release the clutch and feed the converter. The return fluid from the opposite (apply side) of the clutch is routed through the directional valve to a low pressure fluid cooler. A control pressure generated by the solenoid operated valve develops a hydraulic bias which opposes the spring bias. When the hydraulic bias is sufficiently great, the directional valve shifts to a control state in which the solenoid operated valve controls the pressure supplied to either the apply or release side of the clutch to control its torque capacity.

REFERENCES:
patent: 3693478 (1972-09-01), Malloy
patent: 3730315 (1973-05-01), Annis et al.
patent: 3977502 (1976-08-01), Chana
patent: 4468988 (1984-09-01), Hiramatsu
patent: 4570770 (1986-02-01), Nishikawa et al.
patent: 4582185 (1986-04-01), Grimes et al.
patent: 4664235 (1987-05-01), Yokoyama et al.
patent: 4880090 (1989-11-01), Ando

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