Lucas Automotive Gmbh

Lucas Industries Public Limited Company

Lucas Industries Limited

Ralf Erben

Gregor Poertzgen

Ralf Leiter

Guido ZenZen

Wilfried T Giering

Leo Gilles

Ralf Kinder

Marcus Janson

Christian Dilla

Albert Langert

Manfred Meyer

Hans-Georg Madzgalla

Karl-Heinz Schaust

Michael F Walden

Frank-Wilhelm Madzgalla

Michael Herberts

Karl-Friedrich W&ouml;rsdorfer

Karl Friedrich W&ouml;rsdorfer

A hydraulic vehicle brake has a piston which acts upon a friction element and is displaceable by a rotationally drivable spindle/nut arrangement into an actuating position. A spindle of the spindle/nut arrangement is secured against rotation and movable by the spindle nut either into abutment against the piston or away from the piston. The spindle nut comprises a first part, which at least close to one end thereof is configured for screw-type engagement with the spindle, and a second part, configured for rotationally driving the first part and connected to the first part by a rotationally fixed connection. The first part at an other end thereof is provided with a support surface for the rotatable, axial mounting of the spindle/nut arrangement and the second part at the other end extends into the first part.

Vehicle brake having spindle/nut arrangement

The invention relates to a disc brake for a motor vehicle having a housing, a piston which is movable in the housing along a longitudinal axis and a nut-spindle arrangement which acts on the piston or can be brought into engagement with this, wherein the nut-spindle arrangement is arranged in the housing and is workingly supported via a bearing arrangement on a support surface of the housing. In order to increase the service life of the bearing arrangement, the support surface is formed by a defined contact surface which projects with respect to an adjacent housing region and against which the bearing arrangement bears.

Disc brake for a motor vehicle and housing for the same

A hydraulic vehicle brake having an optional locking device is described. The locking device is disposed inside a hydraulic chamber that is delimited by a brake piston. For reducing the hydraulic fluid intake, an incompressible filling body is provided inside the hydraulic chamber.

Hydraulic vehicle brake

In a vehicle brake having a brake piston accommodated in a housing, a blocking device for securing the brake piston inside the housing and an actuating device for controlling the blocking device, it is provided that the brake piston together with the housing delimits a fluid chamber, which is chargeable with hydraulic fluid, so that the brake piston for actuating the vehicle brake is displaceable hydraulically inside the housing along a piston longitudinal axis, that moreover the blocking device comprises a ramp arrangement and a blocking element that is displaceable relative to the housing, and that by means of the actuating device the blocking element in interaction with the ramp arrangement for securing the brake piston inside the housing is displaceable and connectable to the brake piston. In this vehicle brake, it is further provided that the actuating device comprises a motor drive, which is drive-connected to the ramp arrangement, wherein the blocking element upon activation of the motor drive is displaced to secure and release the brake piston inside the housing.

Hydraulically actuable vehicle brake

A method for controlling an electrically actuable parking brake is described. In this method the cutoff current of the electric motor is varied to compensate for example for changes in the application force associated with aging or wear or for changes in the application force due to changes in the resistance and/or temperature of an electric motor.

Parking brake and method for controlling the same

The invention relates to a brake arrangement for a land vehicle comprising the following characteristics: an electric motor with a downstream connected (reduction) gear which acts on the friction pads of a brake arrangement, with the gear being designed self-locking, and an actuation mechanism by means of which the self-locking function can be cancelled or established.

Brake arrangement for a land vehicle

A hydraulic vehicle brake ( ) has a hydraulic chamber ( ) which sealingly accommodates a brake piston ( ) which can slide along an axis (A). The brake piston ( ) acts upon a friction member and can be moved by means of hydraulic pressure which is supplied to the hydraulic chamber ( ) into an actuating position in which it presses the friction member against a rotor (brake disk, brake drum, etc.). In order to be able to use the vehicle brake ( ) besides its function as a hydraulic service brake also as a parking brake, a spindle/nut arrangement ( ) is provided which is driven by an electric motor ( ) and arranged coaxial to the axis (A) of the brake piston ( ), the nut ( ) of which arrangement ( ) is secured against rotation, and by rotation of the spindle ( ) as a function of the sense of rotation can either be moved into contact with the brake piston ( ) or be moved away from the brake piston ( ) translatorily along the axis (A). For realizing a compact and economical construction, the output shaft ( ) of the electric motor ( ) extends at a lateral distance parallel to axis (A) and exits the electric motor ( ) at the side facing away from the brake piston ( ). In addition, a reduction gear ( ) with a reduction ratio in the order of 200:1 is connected between the electric motor ( ) and the spindle ( ), with the electric motor ( ) and the reduction gear ( ) being designed as a subassembly ( ) which can be handled separately.

Hydraulic vehicle brake with blocking means and method for operating same

Spot-type disc brake with resetting means

An adjustment device for a brake actuator including a spindle (20) is arranged between an hydraulically movable piston (12) and a mechanically movable tappet (18). The spindle (20) is formed at its outside with left- and right-hand threads (26) and (28), respectively, on which a collet (22) and an adjusting nut (24), respectively, are threaded in non-self-locking manner or, in other words, reversibly. The collet (22) and the adjusting nut (24) form a conical coupling (25) which, when engaged or closed prevents rotation of the structural members so that the adjustment device acts as a rigid member between the tappet (18) and the piston (12).

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Kemmenau, Germany

Ralf Erben