Abstract: The present invention relates to a brake-by-wire actuator for actuating the brake system of a motor vehicle, comprising a simulator which can be acted upon by a brake pedal, with a signal of an actuation sensor being sent to an electronic control unit which controls a pressure source in response to the signal of the actuation sensor, and wherein an output of the pressure source is connected to a distributor device for the brake force and actuates individual wheel brakes of the vehicle, also comprising means for enabling actuation of the brakes by muscular power within a fallback mode.

Abstract: Disclosed is a container for supplying pressure fluid to a master cylinder of a hydraulic motor vehicle brake system. The container includes a filling reservoir (2,29) arranged at a first level (14,45) and including a fill hole (15,31) and a discharge opening (16,32), a main reservoir (3,30) arranged at a second level (19,46) and including an inlet opening (35, 44 and discharge openings (47,48), as well as a device 8 for monitoring the container's state of filling, with the first level (14,45) being disposed above the second level (19,46), and the filling reservoir (2,29) and the main reservoir (3,30) being interconnected. A device (17,33) for filling the main reservoir is integrated with the container and includes one or more channels (18,34).

Abstract: Vacuum brake booster for motor vehicles comprising a booster housing whose interior is subdivided by a movable wall into a vacuum chamber and a working chamber, a control valve that controls a pressure difference acting upon the movable wall and is accommodated in a control housing that carries the movable wall, said control valve being composed of two concentrically arranged sealing seats and an elastically deformable valve member, wherein the control housing includes a cavity through which a cross member extends and delimits the axial movability of a valve piston relative to the control housing, and the cross member includes at least one projection made of an elastic material in the area where the cross member rests against the booster housing. At least one projection made of an elastic material is provided in the area of points of abutment between the control housing and the cross member.

Abstract: The invention relates to a master cylinder, in particular for a hydraulic brake system, with at least one pressure chamber formed in a housing of the master cylinder and at least one reservoir bore for accommodating a pressure fluid reservoir, a valve with a closing element being provided which due to a pressure difference prevailing between the pressure chamber and the pressure fluid reservoir can be moved into an opening position or a closing position, the valve in its opening position allowing a pressure fluid flow from the pressure fluid reservoir into the pressure chamber and throttling or preventing, in its closing position, a pressure fluid flow in the opposite direction to the pressure fluid flow from the pressure chamber into the pressure fluid reservoir.

Abstract: The present invention relates to a brake force transmission device for a brake force booster with an elastic reaction element, and input member with an associated effective surface, an output member with an associated effective surface, and a first transmission ratio that is defined by a ratio of the effective surfaces being in operative engagement with the reaction element. An object of the present invention is to provide means of a simple design, if possible arranged in the form of an assembly, giving the operator of an automotive vehicle increased support when high braking forces are required. The essence of the invention is the provision of means which starting from a determined pressure prevailing in the reaction element will reduce the reaction force introduced into the input member by a defined amount. The driver is thus given additional support, requiring a proportionately reduced increase in input force for a further increase in output force.

Abstract: Vacuum brake booster for motor vehicles comprising a booster housing 7 whose interior is subdivided by a movable wall 4 into a vacuum chamber 30 and a working chamber 20, a control valve 1 that controls a pressure difference acting upon the movable wall 4 and is accommodated in a control housing 2 that carries the movable wall 4, said control valve being composed of two concentrically arranged sealing seats 9, 10 and an elastically deformable valve member 11, wherein the control housing 2 includes a cavity 40 through which a cross member 60 extends and delimits the axial movability of a valve piston 16 relative to the control housing 2, and the cross member 60 includes at least one projection 62, 80 made of an elastic material in the area where the cross member 60 rests against the booster housing 7. The core of the invention is that at least one projection 66, 84, 85, 88, 90 made of an elastic material is provided in the area of points of abutment between the control housing 2 and the cross member 60.

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.

Abstract: The present invention relates to a vacuum brake booster for motor vehicles, including a booster housing whose interior is subdivided by a movable wall into a vacuum chamber and a working chamber, a control valve that controls the pressure difference acting on the movable wall and is arranged in a control housing that carries the movable wall, said control valve being composed of two concentrically arranged sealing seats and an elastically deformable valve member, as well as including at least one filter in the air passage.

Abstract: The invention relates to a brake force transmission device for a brake force amplifier with an elastic reaction element (7), an input body (22), with an associated working surface (d4), an output body (24), with an associated working surface (d4), with a first transfer ratio, defined by a working surface ratio, actively dependent on the reaction element (7). The aim of the invention is to provide a means, of simple construction, where possible arranged in the form of an assembly, which gives the driver of a motor vehicle increased support when high braking force is required. According to the invention, means (2,4, 6,11) are provided, which reduce the reaction force supplied to the input body (22) by a certain proportion, after a certain pressure in the reaction element (7). The driver is thus given additional support and a relatively reduced increase in input force is required for a further increase in output force.

Abstract: The present invention relates to a reaction force transmission mechanism for a pneumatic brake booster including a largely incompressible reaction plate that is interposed between an input member and an output member and encased at the peripheral side and has lateral abutment surfaces for the input member and the output member, wherein the abutment surface close to the input member can be acted upon by a pressure member which is adapted to be fixed to a control housing and, consequently, can be excepted from the transmission of the reaction force to a vehicle driver. To improve its service life, the reaction plate includes a recess in the area of the abutment of a valve piston extension, in which recess a substantially incompressible, elastic insert is placed.

Abstract: The present invention relates to a brake force booster with a panic braking function for automotive vehicles. The present invention includes that the first sealing seat arranged movably in relation to the control housing wherein the sealing seat is fixed to a lever such that when a predetermined relative displacement between valve piston and control housing is exceeded so that the lever prevents at least a movement of the sealing seat in the actuating direction. The brake force booster with a brake assist function is easy to manufacture and, in addition, ensures a controllability of the brake force in the emergency braking position.

Abstract: The present invention relates to a brake-power transmission device, especially for motor vehicles, including an actuated input member, an output member to exert a boosting force, especially on a main brake cylinder, and a control valve arranged in a control housing to regulate the boosting force. An axially movable pressure piece is provided in the area of a reaction member. The pressure piece is supported on the input member or the control housing, thereby permitting changes to be made in the power transmission ratio. There is a general need to provide a brake-power transmission device that enables increased boosting only when required and that allows for mechanical sensing of the brake actuation speed so that immediate maximum boost force can be exerted when required without any time delay.

Abstract: The brake force booster 1 with panic brake function includes a control valve, which is arranged in a control housing and operable by way of an input member, for controlling the boosting pressure in a working chamber, the said control valve including an atmosphere sealing seat on a valve piston and a vacuum sealing seat which is arranged on a sliding sleeve that is axially slidably mounted in the control housing. In the event of a panic braking, a quick depression of the brake pedal causes advance movement of the valve piston connected to the input member in relation to the control housing and the sliding sleeve, whereby opening of the atmosphere sealing seat is initiated and a clutch device is actuated which leads to supporting the sliding sleeve in the brake actuation direction on the elastically deformable reaction member, to which latter both the mechanically generated brake force and the pneumatic boosting force is applied. The clutch device is released by withdrawal of the input member.

Abstract: A vacuum brake power booster for automotive vehicles having control valve which is operable, irrespective of an actuating rod displacing a valve piston (9), by an electromagnet which actuates a third sealing seat thereby ventilating the working chamber. To minimize the independent actuating force generated by the electromagnet the electromagnet, of the present invention, is rigidly connected to the valve piston, and is arranged to be slidable in the control housing so that the third sealing seat is synchronously movable with the valve piston.

Abstract: A seating for an inertia ball (101) of a deceleration-sensitive brake power control is disclosed, featuring a substantially stepped feature (114) located above a bottom area (105) and which feature engages the inertia ball so as to not allow any horizontal free movement of the inertia ball (101). Advantageously, a positive restraint is provided engaging the inertia ball (101) in a backward direction with respect to the driving direction (v). The chamber (120) beneath the inertia ball (101) collects pressure fluid, so that the inertia ball (101) remains dry.

Abstract: The present invention discloses an actuating unit that achieves shortening of the actuating travel of the brake power booster when the brake system is precharged. The actuating unit is preferably used with hydraulic brake systems of automotive vehicles having a master brake cylinder and a pneumatic brake power booster connected upstream thereof. The master brake cylinder is integrated in the booster housing of the brake power booster and a control valve of the brake power booster is arranged laterally beside the master brake cylinder. The control valve operates opposite to the actuating direction of the actuating member actuating the brake power booster by means of a lever mechanism with variable transmission. The lever mechanism is adapted to be deactivated in terms of effect after a predefinable actuating stroke of the master brake cylinder.

Abstract: A rear brake pressure proportioning control device is disclosed, with a regulating piston (7) and with a valve closing member (9) being supported within a slidable control piston (8), the movement of the control piston interrupted at a predetermined rate of vehicle deceleration. A restriction (32) between the inlet and inlet chamber within which the control piston is disposed prevents a high rate of brake pressure increase from causing too high a rear brake pressure. A multiple-stage restrictor (26) is positioned in the inlet in order to prevent a very high rate of pressure increase of the brake pressure resulting in too low a rear brake pressure.

Abstract: A hydraulic unit for a hydraulic controlling or regulating device, in particular for a braking pressure regulating device in anti-lock control systems or traction slip control systems for automotive vehicles. The hydraulic unit comprises a valve-accommodating member (13) accommodating electromagnetically switchable valves. Hydraulic channels (23) are contained in the valve-accommodating member. Incorporated in the side wall of the valve-accommodating member (13) is a non-return valve which is composed of a resilient element (28) that is clamped into the side wall (33) of a depression of the outside wall of the valve-accommodating member (13). The resilient element (28) is made of spring steel and is furnished with sealing material (34).

Abstract: A tandem master cylinder for hydraulic brake systems of automotive vehicles. The push-rod piston (29) and the floating piston (34) both are provided with a central valve. The central valve of the push-rod piston is coupled to the floating piston. The length of the bore (28) of the central valve in the push-rod piston (29) is dimensioned to allow the valve closure member (27) of the central valve in the push-rod piston to travel a distance within the bore of the central valve at least equal to the stroke of the floating piston (34).

Abstract: An anti-lock hydraulic brake system comprising a separating valve (14) and a regulating valve (19). A combined arrangement is provided wherein the valves are connected into each other. The movability (play s) of the piston (30) affords the event that a compensating volume for the control action in the event that the output of the pump is insufficient in specific situations requiring a large amount of fluid for control.