Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1996-04-23
1997-12-02
Young, Lee W.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
137884, 13759617, 137377, B60T 836
Patent
active
056928130
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an electrohydraulic pressure control device, in particular a braking pressure control device.
An electrohydraulic pressure control device of the generic type is disclosed as an example in international publication No. WO 92/12878, wherein, in addition to the sufficiently known modular construction of the valve accommodating member, the lid is subdivided by a plate-shaped carrier element in order to accommodate component parts of an electronic controller, for example, conducting paths, IC components, on the one hand, and to provide the electrical connection between the electronic controller components and the contact elements projecting from the solenoid valves, on the other hand. The lid along with the coils of the solenoid valves is slipped on the valve domes of the valve accommodating member, and plug contacts engage into each other for making the electrical connection between the contact elements and the electronic or electric components integrated in the lid. For the attachment of the coils to the carrier element, elastic mounting means, for example, springs, are used, or the coils are embedded in an elastic shaped member. The positioning and the fastening of the controller component parts and the coils shall be simplified to achieve a compactness of the assembly and a design of the lid which is favorable with respect to an automatic manufacture (in conformity with the demands of automation).
Thus, an object of the present invention is to construct the pressure control device known from the previously mentioned state of the art such as to provide an easily accessible compact and functionally optimized assembly of the coils and the carrier element and the controller component parts, permitting them to be integrated in the cover and tested as easily as possible, and varying heat expansions of the component parts shall be absorbed with least possible tension.
According to the present invention, this object is achieved by the characterizing features. It is proposed that the top side of the lid forms the carrier element which is confined by a frame that can be closed by a cover after completed accommodation of the parts.
Further features, advantages and possible applications can be taken from the following description of an embodiment.
FIG. 1 shows the preferred embodiment.
FIG. 2 shows a modification of FIG. 1.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT
FIG. 1 shows a lateral view of the pressure control device according to the present invention with a sketch of the basic components. In a first embodiment, the pressure control device includes a substantially rectangular lid 1, shown in a profiled cross-section, comprising a carrier element 2 with a plurality of electric conducting paths 10 and a cover 4 that is placed on top on a frame 3 and is secured by plastic film hinges 15 formed integral with cover 4 and frame 3. Frame 3 defines a chamber divided into an upper portion 17 and a lower portion 18 by carrier element 2. Cover 4 fits over and closes chamber upper portion 17.
Another alternative embodiment of the frame cover is shown in FIG. 2. The cover 4' can be engaged positively into the rim of the frame 3 by means of locking hooks.
Regardless of the chosen individual consideration of the two design variants of a frame-type cover, the carrier element 2 is provided as a frame-type plate which is mounted or covered substantially horizontally over the contact elements 5 of coils 7. The frame-type plate has on its bottom side apertures 6 enlarged like a funnel to facilitate the insertion of the contact elements 5. Favorably, the electric conducting paths 10 are embedded in the carrier element 2 in hot-stamping operations (copper foil stamping method). A section of the contact elements 5 has an offset 11 providing an elastic attachment to the carrier element 2. The electric conducting paths 10 extend on the carrier element 2 until an area shaped as a projection 8 at which an electric plug 9 makes catch. Electric conducting paths 10 have a plurality of apertures 19 alig
REFERENCES:
patent: 5040853 (1991-08-01), Burgdorf et al.
patent: 5275478 (1994-01-01), Schmitt et al.
patent: 5462344 (1995-10-01), Jakob et al.
patent: 5520447 (1996-05-01), Burgdorf et al.
ITT Automotive Europe GmbH
Lewis J. Gordon
Twomey Thomas N.
Young Lee W.
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