ELECTROMAGNETIC VALVE - NIPPON DENSO CO

Title:

ELECTROMAGNETIC VALVE

Document Type and Number:

WIPO Patent Application WO/1994/010487

Kind Code:

A1

Abstract:

The present invention relates to a solenoid valve useful for brake hydraulic control of hydraulic equipment, in which pressure intensifying control is effected, in particular, automatic braking systems for vehicles. The solenoid valve of the present invention comprises a moving member (7) adapted to be moved by an electromagnetic force, a spherical-shaped communication cutoff member (13) biased by the moving member (7) and a seat member (11) having a tapered surface. The communication cutoff member (13) and the moving member (7) are disposed in the same space such that when fluid flows out from the space to another space, a negative pressure is produced only between the communication cutoff member (13) and the seat member (11), which negative pressures sucks the communication cutoff member (13) toward the seat member (11). With this arrangement, when a force acting in a direction, in which the valve closes, is positively used, pressure intensifying can be effected in a pulsing manner with the valve experiencing not a full stroke but a minute stroke in a range of differential pressure, that is, with the flow passage area of the valve kept small, so that good control is made possible without increasing a pressure intensifying amount.

Inventors:

HAYAKAWA HIDEYUKI (JP)
KONDO MASUHIRO (JP)
IMAEDA MAKOTO (JP)
IMOTO YUZO (JP)
TAKEDA KENJI (JP)

Application Number:

PCT/JP1993/001569

Publication Date:

May 11, 1994

Filing Date:

October 28, 1993

Export Citation:

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Assignee:

NIPPON DENSO CO (JP)
HAYAKAWA HIDEYUKI (JP)
KONDO MASUHIRO (JP)
IMAEDA MAKOTO (JP)
IMOTO YUZO (JP)
TAKEDA KENJI (JP)

International Classes:

F16K31/06; B60T8/36; B60T8/42; B60T8/50; B60T15/02; (IPC1-7): F16K31/06

Foreign References:

JPS633582U	1988-01-11
JPH0289881A	1990-03-29
JPS5989876A	1984-05-24

Other References: