Control system for a multiple ratio transmission having a lockup

Details Control system for a multiple ratio transmission having a lockup Control system for a multiple ratio transmission having a lockup

1986-09-11

1987-05-19

Herrmann, Allan D.

Machine element or mechanism

Gearing

With fluid drive

74645, 192 331, 192 0034, F16H 4700

Patent

active

046657703

ABSTRACT:
A control valve system for an automatic transmission having a hydrokinetic torque converter, a lockup clutch in the torque converter for mechanically bypassing the hydrokinetic torque flow path, speed and torque responsive valves for effecting ratio changes in the transmission, a bypass clutch control valve for engaging and disengaging the lockup clutch and a converter bypass valve for triggering operation of the bypass clutch control valve, the bypass clutch control valve being responsive to input torque and speed.

REFERENCES:
patent: 3446095 (1969-05-01), Bookout
patent: 3491621 (1970-01-01), Moan
patent: 4368649 (1983-01-01), Vahratian et al.
patent: 4457411 (1984-07-01), Hiramatsu
patent: 4509389 (1985-04-01), Vahratian et al.
patent: 4535652 (1985-08-01), Nishikawa et al.

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