US 6,634,381 B2 · Solenoid valve device and its manufacturing method

Abstract

A solenoid valve device controls a driving force generated by a linear solenoid (electromagnetic driving portion), for pressing a spool away from the linear solenoid by controlling a current supplied to a coil, and ultimately adjusting an oil pressure flowing from an outlet port. As current supplied to the coil increases, the outlet port oil pressure decreases. An outside diameter of a tube portion of a valve housing is equal to or larger than an outside diameter r1 of the linear solenoid (r2≧r1) and a flange of the valve housing, permitting the entire solenoid valve device to be disposed within a cylindrical reception hole provided in a hydraulic control apparatus body of an automatic gear, for example. A method of manufacturing the solenoid valve device is also disclosed.

Claims17

Dependent claims

A solenoid valve device comprising:

a unitary valve housing including a plurality of openings through which an inside of a peripheral wall of the valve housing and an outside thereof communicate with each other;
a valve member disposed within the valve housing, the valve member being generally cylindrical and being supported by the peripheral wall of the valve housing to freely reciprocate therein for controlling a communication state among the plurality of openings;
and
an electromagnetic driving portion for generating a driving force to displace the valve member;
wherein an outer diameter of the electromagnetic driving portion is substantially equal to or smaller than an outer diameter of the valve housing,
wherein the electromagnetic driving portion and the valve housing are constructed as an integrated assembly in which the electromagnetic driving portion is directly secured to an end of the valve housing.

3 more elements

Dependencies are inferred from the claim text.

Solenoid valve device and its manufacturing method

Life of this patent

Solenoid valve device and its manufacturing method

Life of this patent

Abstract

Claims17