Shift valve for an automatic transmission used in automobiles

Valves and valve actuation – Electrically actuated valve – Balanced valve

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Details

251282, F16K 3106

Patent

active

057410046

ABSTRACT:
Disclosed is a shift valve of a line pressure control system of an automatic transmission used in vehicles. The shift valve comprises a first input line having an orifice; a plug which communicates with the first input line through the orifice; a second input line; an output line which communicates with a hydraulic pressure cylinder; a valve spool for selectively communicating with the second input line and the output line with each other; and an elastic member for balancing the valve spool and the plug.

REFERENCES:
patent: 2831650 (1958-04-01), Richardson
patent: 3570806 (1971-03-01), Sturman
patent: 3756558 (1973-09-01), Okui
patent: 4471811 (1984-09-01), Kawabata et al.
patent: 4796854 (1989-01-01), Ewing
patent: 5029513 (1991-07-01), Duffy

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