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EP0355055A1
Expired / Lapsed
EP
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Electrically operated fluid valve
Assignee: BorgWarner Transmission Systems Monaco SAM
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Filing: 1989-08-09
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Granted: —
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Expires: 2009-08-09
Abstract
Abstract A three-port valve for ABS uses two individual two-port solenoid valves (1,2) one being normally closed, the other normally open in one housing (4) with an internal commoning connection (3) between their individual interiors (H1,H2). The NC valve (1) has an accurately presettable opening force by means of an adjustable magnetic gap (20), to enable it to be adjusted rapidly and accurately pulsable on and off. The valve flaps connect the first two ports (6,7) to the individual interiors (H1,H2). A check valve (11) relieves over-pressures in the common connection (3) to the second port (7), which is for input fluid pressures. The output port (5) is connected in series with the NC interior (H1), then the NO interior (H2) in that order. The first port (6) can be connected to high and low pressure sources (not shown), which can also be pulsed, between them at millisecond repetition rates, for gradually relieving ABS action - the adjustability of the NC valve (1) is particularly cooperable with this form of control.
Inventors
- 👤 Louis Asensio
- 👤 Christian Villa L'Esparradou Dragoni
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 07:32
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/34; B60T8/36; B60T8/3615; B60T8/363; B60T8/3675
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
121 words
A three-port valve device characterized by a normally closed (NC) and a normally open (NO) valve Pair integrated in a single body, wherein each valve of the pair has a respective closure member (12 or 13), which can selectively communicate its respective interior housing volume (H1 or H2) with a respective first or second port (6 or 7) of the combination, and a commoning path (3) between the two housing interiors (H1, H2), which path is connected on the NC valve side directly (i.e. not through either of said closure members) to a third port (5) of the combination, and is connected, when the NO valve is open, past the closure member (13) of the latter to the third port (7).
Claim 2
Dependent Claim
121 words
A three-port valve device characterized by a normally closed (NC) and a normally open (NO) valve Pair integrated in a single body, wherein each valve of the pair has a respective closure member (12 or 13), which can selectively communicate its respective interior housing volume (H1 or H2) with a respective first or second port (6 or 7) of the combination, and a commoning path (3) between the two housing interiors (H1, H2), which path is connected on the NC valve side directly (i.e. not through either of said closure members) to a third port (5) of the combination, and is connected, when the NO valve is open, past the closure member (13) of the latter to the third port (7).
Claim 3
Dependent Claim
34 words
A three-port valve device according to Claim 1, in which both valve closure members are attached to a respective mobile armature part of a two part armature having a magnetic gap (23 or 29).
Claim 4
Dependent Claim
57 words
A three-port valve device according to Claims 1 or 2, in which the closure member (13) and its seating (13B) of the NO valve 2 are by-passed through a check-valve (11) from said housing interior commoning path (3) between the NO and NC valves, when the third port (7) has lower pressure than the commoning path (3).
Claim 5
Dependent Claim
27 words
A three-port valve device according to Claims 1, 2 or 3, in which the NO-valve has a seat body (35) held top and/or bottom against axial movements.
Claim 6
Dependent Claim
32 words
A three-port valve device according to Claim 4, in which shoulders on a fixed armature (28) and/or on the housing body 4 (prevent said axial movements of the NO valve seat body.
Claim 7
Dependent Claim
25 words
A three-port valve device according to any of Claims 1-5, in which the NO-valve has an opening bias (13C) braced against a seat body (35).
Claim 8
Dependent Claim
54 words
A three-port valve device according to any of Claims 1-6, in which the NO-valve (e.g. requiring to have rapid and selectable response times) has an adjuster (41) acting through a push rod (38) to vary the valve closure member (13A) and/or a magnetic gap (29) between mobile and fixed magnetic circuit members (27, 28).
Claim 9
Dependent Claim
53 words
A three-port valve device according to any of Claims 1-5, in which the NO-valve also has a push-rod spring (39) and abutments (42, 27B) forming resilient connection with the mobile member (27), whereby shocks on rapid closure movement of the closure member (13A) tend to be absorbed by reaction of the spring (39).
Claim 10
Dependent Claim
45 words
A three-port valve device according to any of Claims 1-8, in which the NO-valve has a magnetic gap and a valve closure gap settable to provide initial rapid closure against said opening bias (13C), and subsequent extra magnetic force, averaged by said push-rod spring (39).
Claim 11
Dependent Claim
69 words
Four similar three-port valve devices, all according to any of Claims 1-9, characterized by their integration in one single body, e.g. for individual wheel ABS use, wherein all terminals (T) for their solenoids are similarly oriented and grouped in a row and protected by a detachable surround (34); and having all their third ports (7) similarly oriented e.g. for convenience in their common connection to a single fluid source.
Claim 12
Dependent Claim
85 words
Three-port valve device or devices according to any of Claims 1-10 arranged in, or for, an environment in which the first ports (5) are connected to a respective brake cylinder, the second ports (6) are connected to branched high and purge pressure sources, and the third ports (7) are connected in common to a manually controllable pressure source and wherein the NC valve has been adjusted, e.g. by choice of armature gap (29), for ability to react rapidly. [N.B. The defined environment itself is disclaimed].
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