Abstract: A a hydraulic brake system comprises a hydraulic pump for conveying brake fluid from a suction side to a pressure side, at least one electrically controlled hydraulic valve, and a brake fluid reservoir, which is connected to the suction side of the pump, and at least one control unit for controlling the hydraulic pump and the at least one hydraulic valve. In order to improve the availability at low temperatures, the control unit is configured, when a limit temperature is undershot and/or a limit viscosity is exceeded, to heat the brake fluid reservoir by means of the at least one electrically controlled hydraulic valve by actuating it with an electric current.

Abstract: An electrohydraulic brake control device (200) for a motor vehicle for at least four hydraulically actuatable wheel brakes (8a-8d), said brake control device comprising an electrically actuatable pressure source (2), an electrically actuatable inlet valve (6a-6d) for each wheel brake, an electrically actuatable outlet valve (7a-7d) for each wheel brake, and a brake supply line (13), to which the at least four inlet valves (6a-6d) are connected, wherein an electrically actuatable circuit separation valve (40) is arranged in the brake supply line (13) in such a way that, when the circuit separation valve (40) is closed, the brake supply line (13) is hydraulically separated into a first line section (13a) and a second line section (13b), wherein the brake control device (200) comprises at least four hydraulic wheel ports (9a-9d) for connection to the wheel brakes (8a-8d), wherein the brake control device (200) comprises a first hydraulic port (62) for connection to a pressure medium reservoir (4) and a second hy

Abstract: A brake system for a motor vehicle includes a first electrically actuatable pressure source, a first control device, a second electrically actuatable pressure source, an electrically actuatable inlet valve for each wheel brake, an electrically actuatable outlet valve for each wheel brake, a second control device, and a pressure medium reservoir. The first and second pressure sources are connected to a brake supply line to which the inlet valves are connected. An electrically actuatable circuit separation valve is arranged in the brake supply line such that when the circuit separation valve is closed, the brake supply line is separated into a first line section and a second line section. The first line section is connected to the second pressure source and at least two inlet valves, and the second line section is connected to the first pressure source and the other inlet valves.

Abstract: A brake system for a motor vehicle for hydraulically actuatable wheel brakes has a pressure medium reservoir, which has a first and second reservoir. A first port is assigned to the first reservoir chamber and a second port is assigned to the second reservoir chamber. The first and the second reservoir are at least partially separated from one another. An electrically activatable hydraulic pressure source formed by a cylinder-piston arrangement comprises a replenishment port for the replenishment of pressure medium from the pressure medium reservoir and an equalization port for hydraulically connecting a pressure space to the pressure medium reservoir when a piston is in a specified position. A pressure port of the pressure source is connected to hydraulic output ports of the wheel brakes. The replenishment port is connected via a replenishment valve to the first port and the equalization port is connected to the second port.

Abstract: A method for monitoring a hydraulic brake system for a motor vehicle, wherein a diagnostic valve is omitted and, instead, air volume and leakage are identified by a volume balance during generation of a dynamic pressure. An associated brake system is also disclosed.

Abstract: A brake system for a motor vehicle includes hydraulic output ports for activatable wheel brakes. The system includes an electrically actuatable hydraulic pressure source The system also includes a pressure medium reservoir under atmospheric pressure. An electrically activatable inlet valve is connected between each output port and the pressure source. An electrically activatable outlet valve is connected between each outlet port and the pressure medium reservoir Each of the inlet valves is embodied as a 2/2-way valve and in such a manner that the inlet valve can be closed in relation to pressure differences from both directions and can be opened in relation to pressure differences from both directions.

Abstract: A brake system for a motor vehicle comprises a hydraulic line system with at least one normally closed hydraulic valve, wherein a final stage is provided for electrically actuating the at least one hydraulic valve. To minimize noise emissions, the final stage is a final stage with analog control and a computing unit is provided which is configured to determine a valve current based on a pressure difference across the hydraulic valve and to actuate the final stage to make the valve current available at the hydraulic valve.

Abstract: A second electrohydraulic brake control device for a motor vehicle comprises a pressure control valve assembly, an controllable pressure source and a reservoir connection. For a group of wheel brakes, the second electrohydraulic brake control device is connected in series between the associated output pressure connections of a first or main brake control device and the vehicle wheel brakes.

Abstract: A valve arrangement is inserted between a master brake cylinder and a reservoir in a housing of an electrohydraulic motor vehicle brake system which can be activated both by a vehicle driver and independently of the vehicle driver. The valve arrangement can be acted on by a volume flow which can be conveyed by a linear actuator in the direction of a pedal travel simulator, the working chamber of the pedal travel simulator being connected to the master brake cylinder, wherein, for the purpose of simplified construction and actuation, the valve arrangement has a hydraulically actuable non-return valve and a fixed diaphragm arranged parallel to the non-return valve. The non-return valve is arranged together with the fixed diaphragm in a valve carrier which is fastened to a closure plug which closes the housing of the motor vehicle brake system.

Abstract: A solenoid valve has a valve plunger which is guided in a passage bore of a valve housing. The valve plunger with its valve closing element is held in a basic position by a restoring spring. The basic position opens up a valve passage in a valve seat. The valve plunger is arranged between an inlet and an outlet channel in the valve housing. A magnet armature provides actuation of the valve plunger. An inlet chamber is connected to the inlet channel between the passage bore and the valve seat. The valve plunger protrudes into the inlet chamber by way of a step section. As a result of being hydraulically impinged on by the pressure medium of the inlet channel an axial force is generated on the valve plunger that acts oppositely to the closing direction of the valve plunger.

Abstract: A brake system for a motor vehicle with at least four hydraulically activated wheel brakes, including for each of the wheel brakes an electrically activated first wheel valve which is designed to be open when de-energized and an electrically activated second wheel valve which is designed to be closed when de-energized, a first electrically activated pressure source, which is connected to the first wheel valves via a first brake supply line, a second electrically activated pressure source, and a pressure medium reservoir vessel which is, in particular, at atmospheric pressure, wherein the second electrically activated pressure source is connected to the second wheel valves via a second brake supply line, and a method for operating said brake system.

Abstract: An electromagnetic valve whose inlet and outlet ducts are oriented transversely with respect to the valve holding bore in the valve carrier, wherein the outlet duct opens out, at a distance from the discharge of the filter element, in a portion of the valve holding bore in which the filter element has a closed sleeve portion, in order to achieve a noise reduction through targeted diversion of the flow in the direction of the outlet duct.

Abstract: A filter subassembly, having a first screen comprising a fabric that has mesh elements, the mesh size of which determines how effectively particles are prevented from penetrating therethrough, wherein a second screen is provided at a distance from the first screen, and the two screens are arranged in series.

Abstract: A method for monitoring a hydraulic brake system for a motor vehicle, wherein a diagnostic valve is omitted and, instead, air volume and leakage are identified by a volume balance during generation of a dynamic pressure. An associated brake system is also disclosed.

Abstract: A brake system for a motor vehicle with at least four hydraulically activated wheel brakes, including for each of the wheel brakes an electrically activated first wheel valve which is designed to be open when de-energized and an electrically activated second wheel valve which is designed to be closed when de-energized, a first electrically activated pressure source, which is connected to the first wheel valves via a first brake supply line, a second electrically activated pressure source, and a pressure medium reservoir vessel which is, in particular, at atmospheric pressure, wherein the second electrically activated pressure source is connected to the second wheel valves via a second brake supply line, and a method for operating said brake system.

Abstract: An electromagnetic valve, having a valve closing element which is arranged in a valve housing and which is capable of opening or closing a valve passage in a valve seat, having a magnet armature provided for actuating the valve closing element, and having a substantially cylindrical restoring spring which is braced between the magnet armature and a magnet core. In a parallel arrangement with respect to the restoring spring, a spring ring is arranged between the magnet armature and the magnet core, which spring ring has a smaller number of spring windings in relation to the number of spring windings of the restoring spring.

Abstract: An electromagnetic valve, having a valve closing element which is arranged in a valve housing and which is capable of opening or closing a valve passage in a valve seat, having a magnet armature provided for actuating the valve closing element, and having a substantially cylindrical restoring spring which is braced between the magnet armature and a magnet core. In a parallel arrangement with respect to the restoring spring, a spring ring is arranged between the magnet armature and the magnet core, which spring ring has a smaller number of spring windings in relation to the number of spring windings of the restoring spring.

Abstract: A filter subassembly, having a first screen comprising a fabric that has mesh elements, the mesh size of which determines how effectively particles are prevented from penetrating therethrough, wherein a second screen is provided at a distance from the first screen, and the two screens are arranged in series.

Abstract: A solenoid valve comprises a valve closing body, which can open or close a valve passage formed in a valve seat body which is pressed into a valve housing, and comprising a magnet armature acted upon by a restoring spring, arranged in a through-bore of the valve housing. In addition to a press-fit segment, the valve seat body has a clearance-fit segment along the outer jacket of the valve seat body. The clearance-fit segment has a reduced outside diameter in relation to the press-fit segment. The valve housing also has a tube segment, which deflects radially inward and which has a constant inside diameter that is reduced relative to the outside diameter of the press-fit segment. The tube segment thus deflecting into the clearance-fit segment of the valve seat body because of the elasticity of the tube segment.

Abstract: The invention relates to an integrated air-supply unit, in particular for air-suspension systems for motor vehicles, said unit comprising an air compressor having an electric motor and an air dryer. The air compressor together with the electric motor, air dryer and a number of pneumatic connections form a functional unit.