Abstract: Disclosed herein is a method of determining the brake pedal actuation force exerted by a vehicle driver on an actuating pedal in an electrohydraulic brake system which includes a brake master cylinder and an electromechanically driven booster stage connected upstream of the brake master cylinder. The brake pedal actuation force sought is determined according to the formula FPed,Bet=FBet,Hz?FVerst by evaluating output signals of a pressure sensor which detects the pressure induced in the brake master cylinder, and of an auxiliary force determining device which detects the boost force made available by the booster stage.

Abstract: A brake system for motor vehicles comprising a brake master cylinder which can be activated by means of a brake pedal and to which wheel brakes are connected. The brake system also comprises an electrically controllable pressure-generating device, a pressure-regulating valve arrangement to regulate a wheel brake pressure set at a wheel brake, a first electronic control and regulating unit which controls at least one of the pressure-generating device, the pressure-regulating valve arrangement, and an electrically controllable auxiliary pressure-generating device by means of which the brake master cylinder can be activated by means of which a pressure in an intermediate chamber of the brake master cylinder can be controlled or regulated.

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: A braking system having a master cylinder to which wheel brake circuits (I, II) can be connected, a first piston coupled to a brake pedal, a second piston by means of which the master cylinder is actuated, a third piston actuated by the first piston and connected in a force transmitting fashion to the second piston, a simulation device which gives the driver of the vehicle a pedal sensation, an intermediate space between the second piston and third piston, a pressure generating device which controls the pressure in the intermediate space, a pressure medium reservoir vessel which is under atmospheric pressure and which can be connected hydraulically to the intermediate space, and means for electrically controlling the pressure in the intermediate space.

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: 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: A brake system for motor vehicles, which brake system can be actuated both by the vehicle driver and also independently of the vehicle driver in a “brake by wire” operating mode, is preferentially operated in the “brake by wire” operating mode, and can be operated in at least one fall-back operating mode in which only operation by the vehicle driver is possible. The brake system has inter alia an electrohydraulic pressure generating device (5) which outputs a brake system pressure, and a pressure modulation unit which has one inlet valve (6a-6d) and one outlet valve (7a-7d) per wheel brake (8, 9, 10, 11) for setting wheel-specific brake pressures derived from the brake system pressure, wherein the inlet and outlet valves (6a-6d, 7a-7d) output or transmit the brake system pressure when in the non-actuated state.

Abstract: A linear unit for applying an axially acting force, composed of a rotational/translational gear (2) which has a threaded spindle (18) and a threaded nut (19) which are arranged in a gear housing (22), and of an electric motor (1) with a rotor (12) and with a stator (11) which are arranged in an electric motor housing (10). In order to simplify the set-up of the linear unit, while at the same time reducing the packaging space required, according to the invention the threaded spindle (18) is mounted rotatably and axially fixedly inside the gear housing (22) and is connected to the rotor (12) outside the gear housing (22).

Abstract: A brake system for motor vehicle having a system for reducing brake pedal travel. The system having an electronic control and regulating unit (11), a brake pedal (9) having an amplifier chamber (13), a travel detecting device (14), a main brake cylinder (3) with at least one pressure chamber, a brake circuit (I, II), an electrically controllable pressure supply device (18, 19), a pressure regulating valve (20), and a cylinder-piston arrangement (8) for reducing pedal travel. The cylinder-piston arrangement (8) is disposed separately from the brake force amplifier (18; 20; 13; 6) and from the main brake cylinder (3).

Abstract: A hydraulic vehicle brake system and method of operating same. The system includes an electrohydraulic wheel brake pressure modulation unit, a master brake cylinder (11) which has a pressure medium storage reservoir (12) for hydraulic brake fluid and which can be actuated by means of a brake pedal (9) and to which first and second brake circuits (I, II) are connected. Wheel brakes (3, 4, 5, 6) are connected to the first and second brake circuits (I, II). Each of the first and second brake circuits have a pair of inlets valves (14a-d, 114a-b) and a pair of outlet valves (15a-d, 115a-b) connected to the wheel brakes (3, 4, 5, 6). The outlets of the outlet valves (15a-d, 115a-b) of each of the first and second brake circuits (I, II) are connected to one another by means of jointly used hydraulic line sections (16a, 16b).

Abstract: Disclosed is a method for operating a brake system for motor vehicles that can be actuated in a “brake-by-wire” operating mode both by the vehicle driver and independently of the vehicle driver, and that is operated preferably in the “brake-by-wire” operating mode, and that can be operated in a first fallback operating mode wherein a brake force amplifier is available, and in a second operating mode without brake force amplification, in which only operation by the vehicle driver is possible. According to the invention, the “brake-by-wire” operating mode, provided as the normal operating mode, is divided into energy-saving and high-power operating modes, between which a switch is made depending on the braking situation, and using different components of the hydraulic circuit.

Abstract: Disclosed is an electrohydraulic brake system for use in vehicles which can be braked by means of generator operation of an electric drive motor. The brake system comprises, inter alia, a brake booster and an electronic control unit which is provided for distributing the braking effect between a generative component or recuperation braking component and a friction braking component. In order to optimize the take-up of pressure medium, in particular during recuperation braking, the brake booster (6, 11, 15) is configured to be electrically actuated by the electronic control unit (10). The boosting force generated by the brake booster (6, 11, 15) is exerted as a function of variables relevant to the brake system.

Abstract: A brake system has a first piston (2) which is coupled to a brake pedal (3), a second piston (4) used to actuate a master cylinder (1), a third piston (5) actuated by the first piston (2) and movable into a force-transmitting connection with the second piston (4), and a pedal travel simulator. The first and the third pistons are coupled depending on the displacement of the third piston (5). The pressurization of a space (11) between the second and the third piston loads the second and third pistons (4, 5) in opposite directions. A pressure-supplying module (13) enables both filling and evacuation of the space (11) as well as its evacuation. A fourth piston (8) between the first piston (2) and the third piston (5) delimits a hydraulic compartment (9) in interaction with the third piston (5). A valve assembly (10) varies the pressure introduced into the space (11).

Abstract: A pulsation damping capsule including at least one hermetically joint-sealed metal membrane housing made of at least two preferably concave hemispheres, the housing being provided for separating an inner space from a surrounding pressure medium, wherein the hemispheres are connected together along a peripheral seam firmly bonded such that the pulsation damping capsule can be compressed and expanded as an energy accumulator with spring elasticity due to the effect of the pressure medium. A pulsation damping device is provided which is both dimensioned to withstand stresses and is simple to produce, the pulsation damping effect of which can be tailored especially easily to the existing conditions. Further disclosed is a pulsation damping module for housing a plurality of pulsation damping capsules.

Abstract: Disclosed herein is a method of determining the brake pedal actuation force exerted by a vehicle driver on an actuating pedal in an electrohydraulic brake system which includes a brake master cylinder and an electromechanically driven booster stage connected upstream of the brake master cylinder. The brake pedal actuation force sought is determined according to the formula FPed,Bet=FBet,Hz?FVerst by evaluating output signals of a pressure sensor which detects the pressure induced in the brake master cylinder, and of an auxiliary force determining device which detects the boost force made available by the booster stage.

Abstract: The invention relates to an electrohydraulic brake system for motor vehicles of the ‘brake-by-wire’ type. The brake system comprises among others a travel simulator cooperating with a master brake cylinder and a pressure source consisting of a hydraulic pump and a high-pressure accumulator. In order to allow deceleration of the vehicle with brake pressures higher than the pressure predetermined in the master cylinder due to the muscular power of the operator upon failure of the electrohydraulic components of the brake system, it is proposed by the invention that a valve assembly (13) is arranged in the connection between the wheel brakes (7, 8, 11, 12) of the vehicle and the pressure source (20 and 21, respectively), which can be actuated both hydraulically by the pressure supplied by the master brake cylinder (2) and by an external force.

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: A braking system having a master cylinder to which wheel brake circuits (I, II) can be connected, a first piston coupled to a brake pedal, a second piston by means of which the master cylinder is actuated, a third piston actuated by the first piston and connected in a force transmitting fashion to the second piston, a simulation device which gives the driver of the vehicle a pedal sensation, an intermediate space between the second piston and third piston, a hydraulic chamber which is bounded by the third piston and when necessary, a movement of the third piston in the actuating direction is prevented, a pressure generating device which controls the pressure in the intermediate space, a pressure medium reservoir vessel which is under atmospheric pressure and which can be connected hydraulically to the intermediate space, and means for electrically controlling the pressure in the intermediate space.

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.