Abstract: A brake system for motor vehicles having a brake master cylinder that can be operated by a brake pedal, a fluid reservoir assigned to the brake master cylinder, a hydraulic booster stage which is operatively connected to the inlet side of the brake master cylinder, with a booster piston which is subjected to a hydraulic boost pressure supplied by a pressure source and which in all operating modes allows a direct mechanical action by the brake pedal on a hydraulic piston of the brake master cylinder, and having an electrically controllable pressure regulating valve arrangement for metering the boost pressure. In order to provide a brake system of simple design, which is cost-effective to produce and which functions reliably, the pressure regulating valve arrangement can be hydraulically controllable.

Abstract: A sliding valve having a valve slider that can be axially displaced relative to the valve sleeve in order to determine the size of variable passage cross-sections and for establishing a pressurization connection between a high-pressure connection and a working connection and a pressure-reducing connection between the working connection and a low-pressure connection, in that control edges running in the circumferential direction are configured on the outer circumference of the valve slider, which interact with the control edges of the valve sleeve. The control edges of the valve sleeve are configured as edges extending in the circumferential direction relative to the symmetry axis, which are a component of a lateral face of the valve sleeve.

Abstract: It is known in the art to apply a counterforce, which opposes the actuating force, onto an accelerator pedal of a vehicle in the event that the vehicle, with respect to a vehicle parameter, sufficiently deviates from the nominal value. The parameter can be the speed or the measured distance from vehicles driving ahead. The invention discloses a series of embodiments that satisfy especially easily and reliably the defined requirements for applying the counterforce to the pedal.

Abstract: A brake system with a master cylinder, a first piston which is coupled to a brake pedal via a push rod transmitting actuating forces, a second piston which can be actuated by the first piston and which can be brought into force-transmitting connection to a third piston, via which the master cylinder is actuated, at least one elastic element which forms a pedal travel simulator which, in the “brake-by-wire” operating mode, gives the vehicle driver a pleasant pedal sensation, an interspace capable of being acted upon with hydraulic pressure, between the second and the third piston, the action of pressure upon the interspace loading the second and the third piston in opposite directions, a pressure supply device which has a high-pressure source and which allows both a filling of the interspace with pressure medium and emptying thereof, and a valve device for varying pressure fed in the interspace.

Abstract: In order to embody an electrohydraulic brake system of the brake-by-wire type in a way which is optimized in terms of installation space, it is proposed that a booster device for boosting the activation force which is transmitted to a pressure sensor by the brake pedal is composed of a booster module, which is connected upstream of the pressure sensor, and of a hydraulic pressure source, and in that the pressure sensor forms, with the booster module, a first functionally capable assembly which can be handled independently, and a pressure source, an electronic open-loop and closed-loop control unit and a valve block which accommodates the pressure control valves form a second functionally capable assembly which can be handled independently and which is arranged spatially separate from the first assembly.

Abstract: A slide valve for regulating the hydraulic pressure at a working connection to values between a low pressure and a high pressure, for which purpose a valve slide is accommodated in a hole of a housing such that it can move linearly, which housing has a low pressure connection, a high pressure connection and the working connection, for which purpose the working connection is connected to the low pressure connection in the first position of the valve slide, while the working connection is separated from the two further connections in a second position of the valve slide, and having a third position of the valve slide, in which the working connection is connected to the high pressure connection (P). A plurality of radial holes are arranged in the valve slide, through which radial holes flow can pass and which radial holes interact with a plurality of circumferential control edges in the housing which seal the valve slide in the hole in a leakfree manner by means of suitable sealing rings.

Abstract: Disclosed is a method for operating a hydraulic vehicle brake system, having a brake pressure generator operable by a brake actuating device and essentially consisting of a master brake cylinder and a hydraulic booster connected upstream thereof which includes a booster chamber and a booster piston arranged therein, which latter for brake force boosting purposes, can be acted upon by a hydraulic pressure of a high-pressure accumulator that is chargeable by a hydraulic pump according to a sensor system which detects actuation and/or according to a pressure sensor sensing the hydraulic pressure that prevails in the master brake cylinder. In order to provide a safe fallback mode, upon failure of the high-pressure accumulator, the wheel brakes are acted upon by hydraulic pressure of the hydraulic pump according to the sensor system which detects actuation or according to the pressure sensor.

Abstract: The invention relates to a brake system comprising a master cylinder (1) to which wheel brake cylinders are connectable, a first piston (2) which is coupled to a brake pedal (3) by way of a push rod (28) that transmits actuating forces, a second piston (4) used to actuate the master cylinder (1), a third piston (5) which can be actuated by the first piston (2) and can be moved into a force-transmitting connection with the second piston (4), at least one elastic element (6, 7) forming a pedal travel simulator that imparts a pleasant pedal feeling to the operator in the ‘brake-by-wire’ operating mode, a means to couple the movements of the first and the third pistons, which is activated depending on the displacement travel of the third piston (5) in a housing (20), a space (11) between the second (4) and the third pistons (5) to which hydraulic pressure is applicable, with the pressurization of the space (11) loading the second and third pistons (4, 5) in opposite directions, as well as a pressure-supplying mod

Abstract: A brake-by-wire brake system has a pressure supply device (33) keeping on hand highly pressurized pressure fluid for filling the space (21) and a pressure control valve (34) which is connected hydraulically to the pressure supply device (33) and a pressure fluid supply tank (42) in order to control the pressure introduced into the space (21) The pressure control valve can be actuated by the brake pedal or hydraulically (52, 35), and serves the electric control of the pressure in the space (21).

Abstract: A hydraulic vehicle brake equipped with a parking brake device, in particular for motor vehicles, including a brake housing in which a hydraulic service pressure chamber is delimited by a brake piston, wherein the parking brake device acts on the brake piston and, in the applied condition, can be locked by a locking device, and an energy accumulator cooperating with the brake piston is equipped with at least one integrated spring element. In order to realize a simple and low-cost parking brake function that complies with legal requirements, according to the invention, the parking brake device is operable by a pressure that is introduced into the service pressure chamber and enables charging the energy accumulator.

Abstract: A hydraulic vehicle brake includes a brake housing in which a hydraulic working pressure chamber is delimited by a brake piston, wherein the brake piston, in the applied condition, can be locked by means of a locking device, locking thereof being allowed by a relative movement of a force-transmitting element, wherein an energy accumulator cooperating with the brake piston is provided, which is comprised of a lockable accumulator pressure chamber, an accumulator piston delimiting the accumulator pressure chamber, and at least one spring element being supported on the accumulator piston. To perform a parking brake operation, the locking device is activated in that the force-transmitting element after a hydraulic pressure buildup is arrested by an electromagnetic or electromechanical actuator so that a relative movement between the accumulator pressure chamber and the force-transmitting element is rendered possible.

Abstract: The present invention relates to a hydraulic vehicle brake equipped with a parking brake device, in particular for motor vehicles, including a brake housing in which a hydraulic service pressure chamber is delimited by a brake piston, wherein the parking brake device acts on the brake piston and, in the applied condition, can be locked by means of a locking device, and an energy accumulator cooperating with the brake piston is equipped with at least one integrated spring element. In order to realize a simple and low-cost parking brake function that complies with legal requirements, according to the invention, the parking brake device is operable by a pressure that is introduced into the service pressure chamber and enables charging the energy accumulator.

Abstract: The invention relates to an actuating pedal for motor vehicles that is rotatably mounted by means of a pivot axis and includes a sensor device which picks up the pedal travel. According to the invention, the sensor device is comprised of an encoder member and at least two magnetically sensitive sensing elements cooperating with the encoder member.

Abstract: The present invention relates to a pedal assembly for automotive vehicles. The aim of the invention is to prevent the pedal lever (4) from hitting the leg (13) of the driver when a crash occurs, due to displacement of the actuating rod (11) of the brake booster (9). This object is achieved by preventing the pedal lever (4) from rotating in opposition to the direction of actuation. Several measures are proposed to this end. One of said measures consists in exclusively allowing forces to the transmitted in one direction of actuation, which may be effected with the aid of a tie rod (14) that is unable to transmit any pressure forces. Another suggestion aims at mounting the pedal lever on a separately arranged transverse bar (21) rather than on the splashboard (5) as before.

Abstract: An electronically controllable brake actuation system for automotive vehicles includes a simulator interacting with the master brake cylinder, a pressure source drivable by an electronic control unit and by which wheel brakes of the vehicle are pressurizable, the wheel brakes being connectable to the master brake cylinder by at least one hydraulic connection that is closable by separating valves, a device for the identification of the driver's wish for deceleration, each one inlet and outlet valve connected upstream of the wheel brakes, and wheel sensors sensing the rotational behavior of the vehicle wheels. To improve the meterability of braking pressure of a system of the above type, especially in the range of low pressure values, the pressure source is configured as at least one continuously adjustable piston-and-cylinder assembly having a pressure chamber which is connectable to the master brake cylinder and the wheel brakes.

Abstract: The present invention relates to a combined service and parking brake system, especially for automotive vehicles, which includes a hydraulically clampable combined service and parking brake with a mechanical locking device. The mechanical locking device is electrically operable and thus satisfies in a simple fashion the parking function of the hydraulically clamped combined service and parking brake.

Abstract: An electronically controllable brake actuation system for motor vehicles is proposed, with a master cylinder actuated by means of an actuating pedal, said cylinder with brake pressure transducers driven by an electronic control unit, to which wheel brakes of the motor vehicle are directly connected and which are connectable with the master cylinder by means of hydraulic linkages that can be locked by valve devices, with at least one sensor device to recognize the drivers desired deceleration and also with at least one simulator chamber cooperating with the master cylinder. In order to improve the function of a system of this kind, in particular for ASR control processes, it is proposed through this invention that the valve devices be designed as electromagnetic valves driven by the electronic control unit and that the pressure-volume characteristic of the simulator chamber is independent of that of the wheel brakes.

Abstract: The setpoint generator according to the invention utilizes the information "pedal travel s" in combination with the information "pedal force p" by weighting them in input circuits 4,5 and summing up the corresponding partial setpoints p'.sub.s and p'.sub.p to form a setpoint p'.sub.Hz. Here, a countercurrent weighting takes place: If a small force acts on the pedal, the pedal travel is dominant; as the pedal force is growing, the latter is weighted more heavily. In this way, a smooth brake behavior is attained, whereby the comfort is enhanced and the wear of the employed components is reduced.

Abstract: A method of operation of an electronically controllable brake actuation system for anti-lock automotive vehicle brake systems employs a brake system which includes a master brake cylinder operable by an actuating pedal, braking pressure generators which are electromechanically operable by an electronic control unit. The braking pressure generators are directly connected to wheel brakes of a vehicle and are connectable to the master brake cylinder by way of hydraulic connections closable by valves that are electromagnetically operable by the electronic control unit. The system also includes at least one sensor device for identification of the driver wish for deceleration, and at least one simulator chamber interacting with the master brake cylinder. On commencement of a braking operation, a signal representative of the position of the master brake cylinder piston and a signal representative of the actuating speed occurring on the actuating pedal are produced.

Abstract: The present invention relates to a pump, more particularly a radial piston pump, including at least two pump pistons (10) with an associated working chamber (13) each, wherein the working chambers (13) are connected to suction lines (4) by way of suction valve devices (8) and to a joint pressure line (5) by way of pressure valve devices (9), wherein at least one of the suction valve devices (8) opens during the pressure stroke in dependence on the pressure in one of the associated lines (4, 5), and wherein at least one of the suction valve devices (8) opens during the pressure stroke in dependence on the pressure in the pressure line (5).