Electrohydraulic pressure control device

Details Electrohydraulic pressure control device Electrohydraulic pressure control device

1996-07-29

1997-12-23

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

3031131, B60T 1366, F15B 1308

Patent

active

057000719

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

The invention pertains to an electrohydraulic pressure control device, in particular a brake pressure control device and to a method for producing one such pressure control device.


BACKGROUND OF THE INVENTION

An electrohydraulic pressure control device of the relevant kind is described, for example, in the international publication WO 92/12878. In this case, a previously known block design of the valve-holding element is used and the cover is divided by means of a plate-shaped support element in order to hold an electronic controller or parts of an electronic controller, and to establish the electrical connection between the electronic controller and the contact elements protruding at the electromagnetic valves. The cover with the coils of the electromagnetic valves is plugged into the valve domes of the valve-holding element, whereby plug contacts engage each other to establish the electrical connection between the contact elements and the electronic or electrical components integrated in the cover. To attach the coil to the support element it is suggested to use elastic mounts, for example, springs, or to embed the coils in an elastic molded element.
The purpose of the invention to improve the pressure control device known from the named state of the art in order to create a compact and functionally optimized combination of the coils in the support element, which can be easily produced and checked, whereby different thermal expansions of the components can be absorbed with as little stress as possible. Furthermore, a suitable method for production of such a pressure control device is to be created.
In this regard it is suggested that the support element facing the coils feature several slots into which shape and/or pressure locking closing devices are engaged, projecting from the outer surface of the cover. In this case, a particularly water-tight closure of the mount for the coils in the cover is obtained, which is particularly simple to produce and forms a prefabricated unit of the cover with the coils.
With regard to the production method it is proposed to install an appropriately prefabricated circuit path and/or a circuit board prefabricated as a punched grid into an injection mold, so that the injection molding compound fully encloses the circuit paths, whereby the support element protruding from the injection molding compound with the slots can be inverted over the premounted coil unit until the contact elements of the coils come into contact with the coils of the circuit paths. The slots are then sealed water-tight with suitable sealing materials in the form of casting compound, paint, hot adhesive or similar materials.


BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1: The cover of an electrohydraulic pressure control device in cross section
FIG. 2: An alternative design of the coil configuration, shown enlarged.


DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

FIG. 1 shows a side view of the pressure control device limited to the region of the cover 5, whose base forms the essentially plate-shaped support element 2, which is formed along its perimeter surface as a web-like wall section, which, after complete assembly, rests against the surface of the essentially block-shaped valve-holding element. The support element 2 thus forms a homogeneous unit with the cover material, which preferably is injection-molded from plastic. Cast in the support element 2 the circuit paths 7 are illustrated as a circuit board which extends nearly along the entire width and depth of the cover, so that a plug connection 10 located outside the cover wall is connected to the circuit paths 7 even across a protrusion at the cover 5.
For electrical contact of the coils with the circuit paths, according to the number of electrical contact elements 4 protruding from the coils 1, slots 3 are provided in the support element 2, into which the ends of the contact elements 4 are inserted until they are fixed in place at their insertion depth in the slots 3 due to the stop 8 of the coil element. Due to the corr

REFERENCES:
patent: 5520447 (1996-05-01), Burgdorf et al.
English Translation of the International Preliminary Examination Report for application PCT/EP95/00266.
Search Report of the German Patent Office Application No. P4402735.4.

Affiliated with

Also associated with

Rating

Electrohydraulic pressure control device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electrohydraulic pressure control device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrohydraulic pressure control device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1797649