Control valve with integral accumulator

Details Control valve with integral accumulator Control valve with integral accumulator

1994-11-15

1996-04-23

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

192109F, 251 47, F15B 13044

Patent

active

055094481

ABSTRACT:
An engagement control valve for a fluid operated torque transmitter, such as a clutch, has a pulse width modulated (PWM) solenoid, a valve spool and an accumulator. The PWM solenoid supplies control pressure through a flow restrictor to a control chamber adjacent one end of the valve spool which responds by establishing a proportionate engagement pressure for the torque transmitter. The accumulator has a piston slidably disposed in the valve spool, adjacent the control chamber, for fluid communication with the control pressure from the PWM solenoid. A damping chamber is formed adjacent the other end of the valve spool and is in fluid communication with an exhaust port via a flow restrictor.

REFERENCES:
patent: 4875501 (1989-10-01), Ichihashi et al.
patent: 5031663 (1991-07-01), Fukuta et al.
patent: 5042832 (1991-08-01), Takahashi et al.
patent: 5121769 (1992-06-01), McCabe et al.
patent: 5129500 (1992-07-01), Potter et al.
patent: 5174338 (1992-12-01), Yokota et al.
patent: 5184644 (1993-02-01), Wade

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