Hydraulic control with line pressure modulation

Details Hydraulic control with line pressure modulation Hydraulic control with line pressure modulation

1996-05-06

1997-09-23

Bonck, Rodney H.

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

747321, F16H 4502

Patent

active

056694733

ABSTRACT:
A hydraulic control for a transmission has a main line regulator, a torque converter clutch relay valve and a torque converter clutch solenoid valve. During torque converter operation, the pressure regulator is subjected to a line pressure bias signal and supplies pressurized hydraulic fluid to a control system at a substantially constant pressure level. During torque converter clutch operation, the pressure regulator is subjected to an additional line pressure bias signal and a variable pressure bias signal from the torque converter clutch solenoid valve to provide a modulated pressure control whereby main pressure is varied proportionally with torque converter clutch apply pressure.

REFERENCES:
patent: 4768632 (1988-09-01), Moan
patent: 4880090 (1989-11-01), Ando
patent: 4880091 (1989-11-01), Hasegawa et al.
patent: 5251734 (1993-10-01), Benford et al.

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