Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1993-10-12
1995-11-14
Graham, Matthew C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
137884, 3031131, 3031164, 439 34, B60T 836
Patent
active
054660556
DESCRIPTION:
BRIEF SUMMARY
The invention is based on an electrohydraulic unit for regulating the pressure in vehicle braking systems, also called a hydro unit.
BACKGROUND OF THE INVENTION
In a known electrohydraulic unit of this type (European Patent EP 0 373 551 A2), the cap- or hood-shaped lid for covering the electromagnets and relays supports along its one side surface a first, longitudinally extending connector group with a plurality of embedded connectors that is accessible from the outside. On the side remote from this connector group, the hood-shaped lid projects from the hydraulic block, and is equipped here in the projecting region with second, longitudinally extending connector group that is secured to its inside wall. A third connector group secured laterally to the hydraulic block is associated with the second connector group in the projecting region of the lid, and is equipped with the connectors that complement the connectors of the second connector group. When the hood-shaped lid is placed on the hydraulic block, each of the connectors of the second connector group engages a connector of the third connector group. The latter connectors are securely wired to the electromagnets of the fluid valves, and to the relays that are disposed in a part of the third connector group that has no connectors, and are secured individually.
The hood-shaped lid is placed on the hydraulic block and sealed against the block by means of an annular seal. A discharge conduit in the lid or in the hydraulic block ensures that, with leaky fluid valves, no fluid, i.e., brake fluid, can collect inside the hood-shaped lid. On its side remote from the projecting region, the lid has a pair of hinged shoulders that engage respectively each pin protruding from the hydraulic block. For opening and closing, the lid is pivoted around this pivoting axis formed by means of each pin. When the lid closes, the connectors of the second connector group on the underside of the lid automatically come into contact with the complementary connectors of the third connector group, thus producing the electrical connection of the electromagnetic valves and relays to the engine and the connectors of the first connector group.
In a valve block for a hydraulic braking system that is also known (German Patent DE 37 01 019 A1), the electromagnetic valves hinged to the valve block and protruding with their electrical part are covered by a cover that is pivotably held on the valve block. The cover supports a longitudinally extending connector group with a plurality of connectors (blade-contact connector). The electrical connection of the electromagnetic valves to the connectors is effected by means of a flexible connecting foil soldered to both the electrical connections of the electromagnetic valves and the ends of the connectors embedded in reinforcement ribs. In this case, the connection foil is dimensioned such that its position permits a tilting of the cover by 90.degree. to 180.degree. around the edge adjacent to the connector group. This simplifies the soldering process significantly.
OBJECT AND SUMMARY OF THE INVENTION
The electrohydraulic unit of the invention has the advantage of a design that is economical to manufacture and extremely simple to assemble, thus helping to save assembly time. By means of the separation of the connector base and hood, both can be manufactured in relatively simple manufacturing operations, wherein the connector base, including the connector, connector connections and relay-connector contacts, are completely prefabricated. For assembly, the connector base is placed in the upwardly-pivoted state against the hydraulic block. Then the contact foil, previously connected to the electrical connections of the magnet valves, is soldered to connector connections in the hollow space region of the cover cap and, at a pivoting angle of approximately 120.degree., the contact foil rests cleanly against the connector connections and can be easily soldered thereon. The connector base is subsequently joined flush and tightly onto the hydraulic bloc
REFERENCES:
patent: 4813448 (1989-03-01), Leiber
patent: 4842525 (1989-06-01), Galloway et al.
patent: 5137455 (1992-08-01), Moerbe et al.
patent: 5141298 (1992-08-01), Von Hayn et al.
patent: 5288141 (1994-02-01), Isshiki et al.
Deringer Helmut
Mergenthaler Robert
Schmitt Edgar
Siegel Heinz
Graham Matthew C.
Greigg Edwin E.
Greigg Ronald E.
Robert & Bosch GmbH
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