Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1995-11-01
1997-10-28
Poon, Peter M.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
137884, B60T 836
Patent
active
056810997
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an electrohydraulic pressure control device and particularly relates to electrohydraulic pressure control devices used in vehicle braking application.
BACKGROUND OF THE INVENTION
Electrohydraulic pressure control devices are known in the art. As an example, the various embodiments in international publication WO 92/12878 are referred to wherein, apart from the sufficiently known modular construction of the valve-accommodating member, the cover is subdivided by means of a plate-shaped carrier element in order to accommodate an electronic controller, on the one hand, and to establish the electrical connection between the electronic controller and the contact elements projecting from the solenoid valves, on the other hand. The cover along with the coils of the solenoid valves is plugged onto the valve domes of the valve-accommodating member, and plug contacts engage into each other for providing the electrical connection between the contact elements and the electronic controller integrated in the cover.
It is desirable to modify the previously described pressure control device with respect to the attachment of the valve coils in the cover and with respect to a simplified and reliable electrical connection of the coils with the control electronics with a view to simplifying the manufacture, function test and repair.
Thus, an object of the present invention is to expediently redesign the pressure control device known from the above mentioned state of the art in order to provide a compact and functionally optimized pressure control device which permits being manufactured, tested and maintained as easily as possible, and wherein different heat expansions of the component parts and stress from the outside can be absorbed with least possible tension.
This object is achieved wherein the carrier element has a plurality of openings into which a plurality of anchoring means on the coils are engaged in a form-locking manner, with the electric contact elements of the coils being relieved from tensile load.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a partial cross-sectional side view of the pressure control device according to the present invention.
FIG. 2 is a top view of the pressure control device.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIG. 1 shows a side view of the pressure control device according to the present invention in which the basic components are sketched. The pressure control device shown comprises a cover 3, shown in a profiled section, and a block-shaped valve-accommodating member 5 made of steel or light metal. At its centrally arranged bushing-shaped extension 9 directed into the cover 3, the cover 3 accommodates a horizontal plastic plate referred to as carrier element 2. The plastic plate is made of epoxy fiberglass material, and extension 9 extends through bore 8 which is centrally positioned in the plastic plate such that sufficient general movability of the carrier element 2 is ensured in spite of a form-lock between bore 8 and extension 9. This permits unimpeded centering of the coils 1 attached to the carrier element 2 in relation to the valve domes 17 of the valve-accommodating member 5. The form-lock between the bore 8 and the extension 9 is caused by a form-locking means 11 acting as a clip. For the form-locking attachment of the coils 1 to the carrier element 2, cylindrical pins are used as anchoring means 6 which are positioned in pairs on the coils 1 and have annular grooves 13. The anchoring means 6 engage into keyhole-shaped openings 4 in the carrier element 2. The coils 1, which are thus fixed to the carrier element 2, can be aligned by the clearance of the extension 9 in the bore 8 of the carrier element 2 in the necessary range of assembly tolerances.
A compression spring 10 compressed between the carrier element 2 and the cover 3 ensures yielding axial alignment of the coils 1 in relation to the valve-accommodating member 5. Expediently, the compression spring 10 is slipped over the extension 9 and guided radial
REFERENCES:
patent: 1815212 (1931-07-01), Ogg
patent: 4888572 (1989-12-01), Tinley
patent: 4916806 (1990-04-01), Lorenzen
Pneumatische Mikro-Einbauventile Article by Wolf-Dieter Goedecke.
Reinartz Hans-Dieter
Steffes Helmut
ITT Automotive Europe GmbH
Lewis J. Gordon
Poon Peter M.
Twomey Thomas N.
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