Electromagnetically-operated multi-way valve

• US 4,655,255 A
• Filed: 01/16/1986
• Issued: 04/07/1987
• Est. Priority Date: 01/19/1985
• Status: Expired due to Fees

• Current Assignee: Wabco Westinghouse Fahrzeugbremsen GmbH
• Original Assignee: Wabco Westinghouse Fahrzeugbremsen GmbH
• Inventors: Rode, Konrad
• Primary Examiner(s): Nilson, Robert G.
• Application Number:
  US06/819,446
• Time in Patent Office: 446 Days
• Field of Search: 137/595, 137/596.17, 137/627.5
• US Class Current: 137/627.5
• CPC Class Codes: F16K 31/0606 fluid passing through the solenoid coil
• CPC Class Codes: F16K 31/0624 Lift valves
• CPC Class Codes: F16K 31/0627 with movable valve member positioned between seats
• CPC Class Codes: Y10T 137/86919 Sequentially closing and opening alternately seating flow controllers
• CPC Class Codes: Y10T 137/87217 Motor

Abstract

The invention relates to an electromagnetically-operated multi-way valve, which exhibits two valves (an inlet and an outlet) opposite one another. Corresponding to each of the two valves, there is an armature which interacts with a coil, located between the two valves. A coil bracket, disposed through the coil, has a passageway which, upon certain valve conditions, allows communication from the inlet valve to the outlet valve. One of the two valves can be activated against the force of a first spring by the first armature, and the other of the two valves can be activated against the force of a second spring by the second armature. The two springs are designed so that different magnetic forces are required to operate the two valves. The different magnetic forces are produced by a change of the current flowing in the coil. Since there is a separate armature for each valve, which can be operated by one current-controlled coil, it is possible to operate the two valves independent of one another.

Claims

1. An electromagnetically-operated multi-way valve, having at least two valve arrangements, comprising:

(a) a valve housing;

(b) a coil disposed within said housing;

(c) a first armature, operable upon energization of said coil such that, at least one of the at least two valve arrangements can be actuated against a first force exerted by a valve urging means;

(d) said valve urging means, connected to said at least one of the at least two valve arrangements, being effective for holding said at least one valve arrangement in a first position during deenergization of said coil;

(e) a second armature operable uon energization of said coil such that another one of the at least two valve arrangements can be actuated against a second force exerted by a second valve urging means;

(f) said second valve urging means, connected to said another one of the at least two valve arrangements, being effective for holding said another one of the valve arrangements in a first position during deenergization of said coil;

(g) said first armature and said second armature being disposed in opposing relation to one another at opposite first and second ends of said coil such that, said first and second armatures can operate and be activated independent of one another;

(h) such first force and such second force, associated respectively with said valve urging means and said second valve urging means, differing in magnitude such that, said at least one valve arrangement and said another valve arrangement are operated at different times and under different energization conditions of said coil; and

(i) said valve urging means including a first valve spring, and said second valve urging means including a second valve spring, said first valve spring and said second valve spring having different spring constants, thereby effecting such difference in magnitude between such first force and such second force, and requiring different levels of current through said coil to actuate, respectively, said first and said second armatures to overcome such differing spring forces.

2. An electromagnetically-operated multi-way valve, as set forth in claim 1, wherein said at least one valve arrangement is a first, inlet valve, and said another valve arrangement is a second, outlet valve, disposed in said valve housing in opposing relation to said first inlet valve.

3. An electromagnetically-operated multi-way valve, as set forth in claim 1, wherein said coil exhibits a coaxial passageway formed along the longitudinal axis thereof, said multi-way valve further comprising a coil bracket coaxially-disposed within said coaxial passageway formed in said coil, a first end cover disposed adjacent said first end of said coil, and a second end cover disposed adjacent said second end of said coil, said first and second end covers being of sufficient size to enclose said coil therebetween.

4. An electromagnetically-operated multi-way valve, as set forth in claim 3, further comprising a first inlet chamber, formed in said valve housing and bounded on one portion by said first end cover, and a second outlet chamber formed in the opposite end of said valve housing as said first inlet chamber, said second outlet chamber being bounded on one portion by said second end cover, said first inlet chamber being in fluid communication, at times, with said second outlet chamber through a second passageway coaxially formed in said coil bracket.

5. An electromagnetically-operated multi-way valve, as set forth in claim 3, wherein said first and second end covers are composed of a ferromagnetic material such that, said first and second armatures can be actuated therethrough upon energization of said coil, said first and second armatures being essentially disc-shaped.

6. An electromagnetically-operated multi-way valve, as set forth in claim 3, further comprising a first annular sealing gasket, disposed on said first end cover and being effective such that, said coil is sealed against fluid communication with said first inlet chamber and a second annular sealing gasket disposed on said second end cover and being effective such that said coil is sealed against fluid communication with said second outlet chamber.

7. An electromagnetically-operated multi-way valve, as set forth in claim 3, wherein said first inlet valve is formed by a first valve body secured to said first armature and a first valve seat formed around a pressure inlet, and wherein said second outlet valve is formed by a second valve body secured to said second armature and a second valve seat formed around a pressure outlet.

8. An electromagnetically-operated multi-way valve, as set forth in claim 7, wherein said first valve body and said second valve body are secured respectively, to said first and second armatures in essentially a coaxial manner, and further, wherein said pressure inlet and said pressure outlet are formed coaxially at opposing ends of said valve housing.

9. An electromagnetically-operated multi-way valve, as set forth in claim 1, wherein said first spring, associated with said first inlet valve, has a smaller spring coefficient than said second spring, associated with said second outlet valve, thereby allowing operation of said first inlet valve under a lower energization condition imposed on said coil.

10. An electromagnetically-operated multi-way valve, having at least two valve arrangements, comprising:

(a) a valve housing;

(b) a coil disposed within said housing;

(c) a first armature, operable upon energization of said coil such that, at least one of the at least two valve arrangements can be actuated against a first force exerted by a valve urging means;

(d) said valve urging means, connected to said at least one of the at least two valve arrangements, being effective for holding said at least one valve arrangement in a first position during deenergization of said coil;

(e) a second armature operable upon energization of said coil such that another one of the at least two valve arrangements can be actuated against a second force exerted by a second valve urging means;

(f) said second valve urging means, connected to said another one of the at least two valve arrangements, being effective for holding said another one of the valve arrangements in a first position during deenergization of said coil;

(g) said first armature and said second armature being disposed in opposing relation to one another at opposite first and second ends of said coil such that, said first and second armatures can operate and be activated independent of one another;

(h) such first force and such second force, associated respectively with said valve urging means and said second valve urging means, differing in magnitude such that, said at least one valve arrangement and said another valve arrangement are operated at different times and under different energization conditions of said coil; and

(i) a coaxial passageway formed within said coil and having a coil bracket disposed therein;

a second passageway being coaxially formed within said coil bracket, and, further, wherein said first and second armatures are tubular-shaped and are of such a diametrical dimension as to each have a portion disposed partially in said second passageway such that, movement of said first and second armatures occurs in a guided manner.

11. An electromagnetically-operated multi-way valve, as set forth in claim 10, wherein said first and second tubular-shaped armatures each exhibit, at the respective portions extending outward of said second coaxial passageway, first and second cup-shaped expansions which serve as respective first and second valve bodies, said first cup-shaped valve body, associated with said first inlet valve, having formed on the inner portion thereof, a first valve seat;

and said second cup-shaped valve body, associated with said second outlet valve, having formed on the inner portion thereof, a second valve seat, said multi-way valve further comprising at least one duct formed in said coil bracket which can communicate fluid pressure from said second coaxial passageway and from respective first and second hollow portions of said first and second tubular-shaped armatures to at least one outlet port.

12. An electromagnetically-operated multi-way valve, as set forth in claim 11, wherein said at least one duct includes at least one longitudinal duct, formed approximately parallel to said second coaxial passageway, and one annular duct, formed in said coil bracket, so as to allow fluid communication between said second coaxial passageway and said at least one longitudinal duct.

13. An electromagnetically-operated multi-way valve, as set forth in claim 12, wherein said at least one output port can be put in fluid communication with said second outlet valve through said at least one longitudinal duct, through said annular duct, and through said hollow portion of said second tubular-shaped armature when said second outlet valve is activated to an open condition and said first inlet valve is in a closed condition;

and further, wherein said at least one output port can be put into fluid communication with said first inlet valve through said first hollow portion of said tubular-shaped first armature, through said annular duct, and through said at least one longitudinal duct when said first inlet valve is in an open condition and said second outlet valve is in a closed condition.