Robert Boschgmbh

Roland Benzinger

Heinz Siegel

Edgar Schmitt

Ewald Huebl

Klaus Mueller

Georg Kehl

Michael Krauter

Dietmar Rischen

Carsten Pabst

Walter Steinhauser

Martin Jordan

Peter Eberspaecher

Erhard Ellendt

Manfred Himmelsbach

Rolf Igelmann

Hiroaki Atsushi

An anti-lock device for a hydraulic automobile brake system includes a housing block for receiving an eccentric directional valves, two coaxially oriented pump pistons and first and second storage chambers. So that the housing block can be made narrower, the longitudinal axes (F, G, I, J) are distributed to the corners of a quadrangle. At the same time, the common longitudinal axis (E) of the pump pistons can be located between the longitudinal axes of the storage chambers.

Anti-lock device for a hydraulic vehicle brake system

Housing block for a hydraulic braking system

A brake system with traction control, having a master brake cylinder for at least one brake circuit and having a brake booster is proposed. By operation of a pump, servo pressure is fed into the brake booster via a pressure connection provided on the brake booster, and the servo pressure reaches a pressure reservoir through a bore provided on the brake booster. From there, given a corresponding open passage position of magnetic valves, the servo pressure, via a supply line, reaches the pressure cylinder present in the brake booster, and in the pressure cylinder there is a valve slide that, via a servo piston, actuates a pressure rod leading to the master brake cylinder.

Brake system

A brake system including an apparatus for limiting drive slip at drivable vehicle wheels by feeding brake pressure into wheel brakes associated with these vehicle wheels. The brake pressure is generated in a pressure modulator having a spring-loaded stepped piston including a primary piston. The primary piston can be acted upon by pressure fuid from a supply container by a motor which drives a pump. A secondary piston of the stepped piston effects the brake pressure and feeds it via a valve assembly into a brake line extending between the master brake cylinder of the brake system and a wheel brake. The brake pressure can be diminished by controlling the drive motor of the pump. The pump is embodied with reversible pumping directions, and the pressure fluid flows through it both during a working stroke and a return stroke of the stepped piston. The valve assembly is actuatable by the stepped piston as a function of the position thereof. The apparatus uses the pump drive alone in order to generate brake pressure, and uses the position of the stepped piston to actuate the valve assembly. This makes it possible to dispense with magnetic valves.

Hydraulic brake system with reversible pump for traction control

Growing community of inventors

Stuttgart, Germany

Roland Benzinger