Pressure control valve arrangement having diaphragm valves for controlling a fluid pressure in an ABS brake system of a vehicle, having a valve seat integrated in a unipartite fashion in a plastic housing part

Patent metadata

Field	Value
Publication number	US-9637099-B2
Application number	US-97010810-A
Country	US
Kind code	B2
Filing date	Dec 16, 2010
Priority date	Jun 17, 2008
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

A pressure control valve arrangement is provided for controlling the fluid pressure in an ABS brake system of a vehicle such that, in the event of a tendency of individual wheels of the vehicle to lock, the brake pressure in associated brake cylinders can be adaptively adjusted. At least two diaphragm valves, which have diaphragms which are loaded by spring elements, and at least one electromagnetic control valve, which can be activated by an electronic control device for the pilot control of the diaphragm valves, are provided in a housing of the pressure control valve arrangement. At least one valve seat of the at least one electromagnetic control valve is formed in a unipartite fashion with a housing part which is formed by a plastic injection-molded blank.

First claim

What is claimed is:

1. A pressure control valve arrangement for controlling fluid pressure in an ABS brake system of a vehicle, the pressure control valve arrangement comprising:
at least two diaphragm valves having diaphragms loaded by spring elements, the spring elements being supported by centering pins that are formed integrally with the at least two diaphragm valves;
at least one electromagnetic control valve activatable by an electronic control device, the at least one electromagnetic control valve being configured for pilot control of the two diaphragm valves; and
a housing of the pressure control valve arrangement in which are arranged the two diaphragm valves and the at least one electromagnetic control valve, wherein
a part of the housing is a plastic injection-molded blank that comprises in a unipartite construction at least one valve seat of the at least one electromagnetic control valve, the part of the housing being a single intermediate plate,
the single intermediate plate is arranged between a housing part which has openings for the diaphragms and another housing part, in which the components of the at least one electromagnetic control valve are accommodated, with the exception of the at least one valve seat formed in the single intermediate plate,
the housing of the pressure control arrangement consists exclusively of the housing part, the single intermediate plate and the another housing part,
the another housing part is a plastic injection-molded blank into which at least one magnet coil of the at least one electromagnetic control valve is injected, the another housing part being injection-molded around the at least one magnet coil, and on which a plug-in contact housing, that is a separate piece from the another housing part of the housing, is arranged for control of said at least one magnet coil of said at least one electromagnetic control valve by an external electronic control unit,
the at least one electromagnetic control valve is arranged to seal against the at least one valve seat, and
the at least one valve seat has a conical shape and delimits a central fluid channel in the housing part, the conical shape being defined by a surface of the intermediate plate, and
the at least one valve seat being provided with at least one annular blind hole recess having a tapered conical profile that facilitates the molding process.

2. The pressure control valve arrangement according to claim 1 , wherein the housing part with the at least one valve seat is a plate-like fiber-reinforced plastic injection-molded blank.

3. The pressure control valve arrangement according to claim 2 , wherein the housing part comprises fiber-reinforced polyamide.

4. The pressure control valve arrangement according claim 1 , further comprising a spring, wherein the housing defines an opening into which an armature is fitted, the armature having a flanged first end against which the spring abuts.

5. The pressure control valve arrangement according to claim 1 , wherein the at least one valve seat is operatively configured on a surface of the housing part facing the another housing part in which further components of the at least one electromagnetic control valve are accommodated.

6. The pressure control valve arrangement according to claim 5 , wherein said further components comprise an armature and a magnet core of the at least one electromagnetic control valve.

7. The pressure control valve arrangement according to claim 4 , wherein the at least one valve seat is operatively configured on a surface of the housing part facing the another housing part in which further components of the at least one electromagnetic control valve are accommodated.

8. The pressure control valve arrangement according to claim 7 , wherein said further components comprise an armature and a magnet core of the at least one electromagnetic control valve.

9. The pressure control valve arrangement according to claim 5 , wherein the another housing part is connected to the housing part having the valve seat.

10. The pressure control valve arrangement according to claim 8 , wherein the another housing part is connected to the housing part having the valve seat.

11. The pressure control valve arrangement according to claim 5 , wherein the another housing part is a plastic injection-molded blank into which at least one magnet coil of the at least one electromagnetic control valve is injected.

12. The pressure control valve arrangement according to claim 9 , wherein the another housing part is a plastic injection-molded blank into which at least one magnet coil of the at least one electromagnetic control valve is injected.

13. The pressure control valve arrangement according to claim 5 , wherein the another housing part comprises at least one passage bore in which said further components are insertable, a center axis of the passage bore being arranged coaxially with respect to the at least one valve seat.

14. The pressure control valve arrangement according to claim 6 , wherein the another housing part comprises at least one passage bore in which said further components are insertable, a center axis of the passage bore being arranged coaxially with respect to the at least one valve seat.

15. The pressure control valve arrangement according to claim 11 , wherein the another housing part comprises at least one passage bore in which said further components are insertable, a center axis of the passage bore being arranged coaxially with respect to the at least one valve seat.

16. The pressure control valve arrangement according to claim 13 , further comprising a cover operatively arranged to close the at least one passage bore.

17. The pressure control valve arrangement according to claim 1 , wherein said arrangement is a single-channel pressure control valve arrangement.

18. The pressure control valve arrangement according to claim 1 , wherein said pressure control valve arrangement controls fluid pressure in the ABS brake system of the vehicle such that in an event of a tendency for individual wheels of the vehicle to lock, brake pressure in associated brake cylinders is adaptively adjusted.

19. A method of making a pressure control valve arrangement for controlling fluid pressure in an ABS brake system of a vehicle, the method comprising the acts of:
forming at least two diaphragm valves having diaphragms loaded by spring elements, the spring elements being supported by centering pins that are formed integrally with the at least two diaphragm valves;
forming at least one electromagnetic control valve activatable by an electronic control device, the at least one electromagnetic control valve being configured for pilot control of the at least two diaphragm valves; and
forming a housing of the pressure control valve arrangement in which are arranged the at least two diaphragm valves and the at least one electromagnetic control valve, wherein
a part of the housing is a plastic injection-molded blank that comprises in a unipartite construction at least one valve scat of the at least one electromagnetic control valve, the part of the housing being a single intermediate plate,
the single intermediate plate is arranged between a housing part which has openings for the diaphragms and another housing part, in which the components of the at least one electromagnetic control valve are accommodated, with the exception of the at least one valve seat formed in the single intermediate plate,
the housing of the pressure control arrangement consists exclusively of the housing part, the single inte

Assignees

• Eidenschink Rainer
• Gerber Wilfried
• Rohn Wolfgang
• Knorr Bremse Systeme Fuer Nutzfahrzeuge Gmbh

Inventors

• Eidenschink Rainer
• Gerber Wilfried
• Rohn Wolfgang

Classifications

• B60T8/3605 Primary

  wherein the pilot valve is mounted in a circuit controlling the working fluid system · CPC title

• Y10T29/49405

  Valve or choke making · CPC title

• B60T8/3675

  integrated in modulator units · CPC title

• Y10T137/7761

  Electrically actuated valve · CPC title