Pulse width modulated solenoid valve for control of hydrodynamic

Details Pulse width modulated solenoid valve for control of hydrodynamic Pulse width modulated solenoid valve for control of hydrodynamic

1995-05-15

1996-12-10

Bonck, Rodney H.

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

192109F, F16H 4502, F15B 13043, F16K 3106

Patent

active

055822789

ABSTRACT:
A pulse width modulated solenoid valve for control of hydrodynamic torque converters of automatic transmissions, comprising an electromagnetic switching element (11) and a valve body (12 ), wherein the valve body (12 ) has: an end (13 ) facing the switching element; an end (14 ) remote from the switching element; a control pressure chamber (15) for a fluid medium; a control spool (28) with at least one control groove (29a); a control pressure connection (20) to the control pressure chamber (15) for the fluid medium; at least one first pressure connection (22) connecting the control pressure chamber (15) to at least one outlet (21); at least one second pressure connection (24, 26) connecting at least one working chamber (16, 17) with at least one outlet (23, 25); at least one counter-pressure chamber (18) located at the opposite end of the valve body (12) to the control pressure chamber (15); at least one pressure connection (20, 22, 24, 26) being capable of being connected to at least one outlet (21, 23, 25) through a control groove (29a, 29b, 29c) on the control spool (28); wherein at least one spring element (27) is arranged in the counter-pressure chamber (18) the spring element (27) providing a counter-force to inhibit high accelerations of the control spool (28) in the direction away from the electromagnetic switching element (11).

REFERENCES:
patent: 4744269 (1988-05-01), Greene et al.
patent: 5058716 (1991-10-01), Lippe et al.
patent: 5119914 (1992-06-01), Dadel et al.
"Kraftfahrzeugtechnik", Gerigk et al, Westerman-Verlag, 2nd Edition, pp. 349-351.

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