Solenoid valve for automatic transmission control system

Details Solenoid valve for automatic transmission control system Solenoid valve for automatic transmission control system

1997-06-27

1999-04-27

Ferensic, Denise L.

Valves and valve actuation

Electrically actuated valve

Having means to produce proportional flow

25112921, 251205, F16K 3102

Patent

active

058970983

ABSTRACT:
A solenoid valve (10) for use in an electronic shift control system of an automotive automatic transmission. The solenoid valve includes a body (12) having a cylindrical chamber (34) in which a movable armature (34) is slidably received and which is in communication with an inlet (96) for the automatic transmission fluid and an outlet (104). The body defines a cylindrical valve seat (88) in which a cylindrical valve member (90) coupled to the armature is slidably fitted. The valve member has a control port (92) opening onto the circumferential outer surface thereof and an inner passage (94) communicating the control port with the inlet (96). The solenoid valve is operable to control the fluid pressure substantially proportionally to the axial movement of the armature even in a condition in which a large amount of air bubbles are contained in the automatic transmission fluid.

REFERENCES:
patent: 1833030 (1931-11-01), Kenworthy
patent: 4193421 (1980-03-01), Sakakibara et al.
patent: 4437645 (1984-03-01), Nomura et al.
patent: 4504039 (1985-03-01), Akagi
patent: 4512546 (1985-04-01), Inada et al.
patent: 4535815 (1985-08-01), Ohumi et al.
patent: 5199648 (1993-04-01), Fujikawa
patent: 5533707 (1996-07-01), Beesley

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