An electrohydraulic vehicle braking system is provided, comprising an electrically controllable first hydraulic pressure generator and an electrically controllable second hydraulic pressure generator. The braking system further comprises a first valve device for each wheel brake, having at least one first valve, wherein in an electrically uncontrolled state the first valve device separates its associated wheel brake from an output of the first hydraulic pressure generator, and in an electrically controlled state connects it to the output of the first hydraulic pressure generator. In addition, a second valve device for each wheel brake is provided, having a second valve between an output of the second hydraulic pressure generator and its associated wheel brake, as well as a third valve between this wheel brake and a first hydraulic fluid reservoir. The first valve device and the second valve device are arranged in parallel to one another.

A check valve for a solenoid valve inclues a check valve seat that is arranged on an edge of a fluid passage and a movable closing element configured to execute a direction-oriented throughflow and sealing function. The closing element includes a sealing cone, a contact foot with a plurality of outflow grooves formed on the edge, and an elastic sealing ring that is arranged between the contact foot and the sealing cone. The outflow grooves form in each case a seating edge for the elastic sealing ring during sealing. The outflow grooves are configured in each case with an arcuate seating edge, which has a predetermined arc length, so that a circle segment of the elastic sealing ring, with an opening angle in the region of 40° to 120°, butts against the respective seating edge during sealing. A solenoid valve includes the check valve.

A hydraulic brake system for a vehicle includes a master brake cylinder, a hydraulic unit, and multiple wheel brakes. The hydraulic unit Ha at least one brake circuit for modulating the braking pressure in the wheel brakes. At least one wheel brake is paired with a bistable solenoid valve, which is looped into the corresponding fluid channel directly upstream of the paired wheel brake and which enables the braking pressure in the paired wheel brake to be modulated in a de-energized open position and locks the current braking pressure in the paired wheel brake in a de-energized closed position, wherein a volume equalization device which comprises a connectable accumulator opens into the corresponding fluid channel between the bistable solenoid valve and the paired wheel brake.

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.

A brake system to couple between brakes and actuators provides a modular format that allows a plurality of braking modules to be coupled together at interfaces and coupled to other modules to handle a variety of different braking scenarios. Each braking module includes a housing forming a manifold for the delivery of fluid to the interfaces of the modules for exchange between the modules. The braking modules include a hydraulic valve coupled with a pressurized fluid source for delivering fluid to implement a braking function. The modules also include an electro-hydraulic valve configured for receiving electrical input signals and configured for delivering fluid from the pressurized fluid source to the hydraulic valve at an actuation pressure that is proportional to the system pressure based on the levels of the received electrical input signals. Module interfaces are positioned on respective sides of the housings for coupling the braking modules together and include a repeated pattern of apertures for aligning between the braking modules. The aligned apertures are configured for passing fluid at the system pressure and fluid at the tank pressure between the plurality of braking modules.

A brake system for vehicles, comprising hydraulically actuatable wheel brakes, a first electrohydraulic brake control device, having an associated pressure-medium. The first brake control device comprises a first pressure-providing device for supplying the wheel brakes. An inlet valve and an outlet valve for setting wheel-specific brake pressures, and a wheel-specific output pressure connection connected to the pressure-medium reservoir by the outlet valves. A second electrohydraulic brake control device, comprises a second pressure-providing device with a first pump having a suction side and a pressure side for supplying a first wheel brake of the wheel brakes. The second brake control device is connected downstream of the first brake control device and the suction side of the first pump is connected to a first of the output pressure connections of the first brake control device. A check valve is connected in parallel with the outlet valve of the first output pressure connection.

In a hydraulic unit, which is for a hydraulic brake system, that has a hydraulic block and at least one valve device, the valve device includes a hydraulic cartridge with a valve seat and with a movable closing body for blocking and opening the valve seat, and a magnet assembly with a magnet coil for generating a magnetic force for moving the closing body. The magnet assembly is integrated into the hydraulic block, and the valve device has a permanent magnet in order to assist the movement of the closing body by means of magnetic force.

A valve armature assembly of a solenoid valve includes a body, a closing element, and an elastic damping element. The body includes a depression located at an end of the body. The closing element is received in the depression and includes a closing member configured to interact with a valve seat of the valve. The elastic element is positioned in the depression between the closing element and the body and is configured to damp a pulse resulting from the closing member striking the valve seat.

A valve seat support for a solenoid valve consists of a sleeve-shaped support housing for accommodating a valve seat body, which is produced from a plastic and which has the contour of a hollow cylinder. The support housing has, on the periphery thereof, a plurality of small-surface recesses, which are directly radially inward and which are surrounded by the plastic of the valve seat body on all sides in order to establish an interlocking connection between the support housing and the valve seat body.

Hydraulic valves for dampening pressure spikes and associated methods are disclosed herein. In one embodiment, a hydraulic valve for dampening pressure spikes includes: a spool configured to move axially inside the hydraulic valve; and a sleeve configured to at least partially house the spool. A location of the spool with respect to the sleeve may determine a flow of a working fluid through the hydraulic valve. A viscous damper is at least partially housed inside an opening in the spool, and a viscous friction between the viscous damper and the opening in the spool slows a motion of the spool.