Control system for torque converter

Details Control system for torque converter Control system for torque converter

1993-07-06

1995-07-25

Bonck, Rodney H.

Machine element or mechanism

Gearing

With fluid drive

192 33, 192 358, F16H 6114, F16K 1730

Patent

active

054352118

ABSTRACT:
A control system for a torque converter includes a lockup clutch provided in the converter for connecting input and output shafts of the torque converter directly. The lockup clutch includes an engaging chamber and a releasing chamber. The control system further includes a lockup shift valve for selectively switching communication between a fluid line, having a predetermined pressure, and the engaging chamber and communication between the fluid line and the releasing chamber. A lockup control valve is provided for controlling a pressure difference between fluid pressures in the engaging chamber and the releasing chamber and a control valve is provided for controlling the lockup clutch so that it engages completely. A first on-off solenoid valve controls the lockup shift valve, a duty solenoid valve controls the lockup control valve, and a second on-off solenoid valve controls the control valve.

REFERENCES:
patent: 4624284 (1986-11-01), Lembke
patent: 4664235 (1987-05-01), Yokoyama et al.
patent: 4732245 (1988-03-01), Hiramatsu
patent: 4966263 (1990-10-01), Hayasaki
patent: 5152386 (1992-10-01), Imamura

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