Abstract: To control the braking effect of a brake-slip controlled hydraulic or pneumatic brake system for automotive vehicle transducers (14, through 18) serve to determine the braking pressure, the axle loads, the translational deacceleration of the vehicle, the brake torque, the brake force and the wheel rotational behavior, and to evaluate these measured values after they have been electronically prepared, logically combined and processed, to control of the braking pressure variation. Upon the occurrence of an anomaly between the translational deacceleration of the vehicle and the braking pressure which is indicative of overbraking, the braking pressure in all or in individual wheel brake cylinders is periodically decreased and/or kept constant and reincreased by virtue of control of the pressure medium supply and its return flow.

Abstract: A device for controlling the pressure in an auxiliary-pressure supply system of a hydraulic brake unit for automotive vehicles, which device comprises a diaphragm-type or bladder-type accumulator equipped with a hydraulic and electric switching arrangement by way of which the hydraulic pressure in the pressure accumulator can be reduced to a predetermined value after the engine of the vehicle has been turned off. An electromagnetic multidirectional control valve is used to divert hydraulic fluid back to a reservoir through a pressure-limiting valve connected downstream thereof. After the engine of the vehicle has been turned off, the multidirectional control valve remains open until the accumulator pressure has decreased to at least the gas inflation pressure of the accumulator. The invention reduces permeation of gas molecules through the diaphragm of the accumulator into the hydraulic fluid and thus effects a longer useful life of the pressure accumulator.

Abstract: A brake-slip-controlled brake system for automotive vehicles comprises a master cylinder (1) acted upon by the pedal force (F) in a direct or auxiliary-force-assisted manner and connected with the wheel brake cylinders in the vehicle wheels (VR, HR) e.g. via diagonally allocated hydraulic brake circuits 4, 5. The axial displacement of a rotating cam (32) is controlled by means of sensors (41-43) measuring the braking pressure, the axle loads, and the translational acceleration of the vehicle and feeding corresponding electric signals into an electric circuit arrangement (44). The cam (32) has bevelled control surfaces (48) and acts on braking pressure control valves (8, 9) by way of tappets.

Abstract: A device to provide the control pressure required in the wheel brake cylinder of automotive vehicles incorporating brake slip control apparatus. While it is known to make available the control pressure by a pump-accumulator system, the present invention provides a replaceable pressure reservoir with a highly expansive medium. The fluid reservoir has an exhaustible volume of pressure fluid and a release device actuatable by slip control electronics so that the control pressure is generated only at the beginning of each controlled braking action. This arrangement has a considerable advantage related to manufacturing costs compared to the known arrangements, since there is not need for the pump-accumulator system.

Abstract: The weight of a cast piece, such as a brake caliper casting, is reduced by inserting a core element of lower density than the density of the moulded or cast material into those areas of the cast piece which are not highly stressed when the cast piece is subjected to bending forces. Preferably, the core element is cast in place along with the casting material.

Abstract: A caliper guide for a floating caliper disc brake comprising guide grooves and projecting parts with either the guide grooves or projecting parts being elastically deformable under the action of the braking force to thereby break loose particles of corrosion or dirt present on the guide surfaces.

Abstract: An arrangement for generating and making available a vacuum for an auxiliary power system of a vehicle, such as a brake booster, comprises a throttle disposed in the intake system of an internal combustion engine between the carburetor and the engine, a vacuum conduit having one end connected to the auxiliary power system and the other end connected to the intake system between the throttle and the engine, a first sensor coupled to the conduit produces a first response when the vacuum has achieved at least a predetermined value, at least one second sensor responding to at least one other operating state of either the engine or the vehicle to produce a second response dependent on the operating state, and a control arrangement coupled to the first and second sensors and the throttle to control the throttle in response to the first and second responses.