Abstract:
The invention relates to a servo brake for a brake-by-wire-type motor vehicle brake system. Said servo brake can be actuated by means of a brake pedal and an electronic control unit in accordance with the driver's wishes and independently of the driver's intentions. The brake pedal is coupled to an input member of the servo brake by means of a piston rod head having longitudinal guiding openings in such a way that the brake pedal can be moved to a limited extent relative to the input member, thus ensuring that the force-transmitting connection between the brake pedal and the input member is canceled especially in the brake-by-wire mode of operation. In order to make it easier to mount the brake pedal in the interior of the motor vehicle, especially to couple the brake pedal to the input member of the servo brake, the piston rod head (8) is designed as a U-shaped bent part which embraces the brake pedal (4).
Abstract:
Die Erfindung betrifft eine Vorrichtung zum Ermitteln des Aussteuerpunkts (11) eines Unterdruck-Bremskraftverstärkers (8) mit einer Vakuumkammer (1) und einer Arbeitskammer (2), die durch eine Membran (7) voneinander getrennt sind. Das Erreichen des Aussteuerpunkts (11) kann einfach und genau erkannt werden, wenn der in der Vakuumkammer (1) herrschende Unterdruck mittels eines Drucksensors (9) gemessen und das Ausgangssignal des Drucksensors (9) von einer Auswerteelektronik (15) ausgewertet wird, die den Aussteuerpunkt (11) mittels einer mathematischen Funktion allein unter Berücksichtigung des in der Vakuumkammer (1) herrschenden Drucks berechnet.
Abstract:
The invention concerns brake booster wherein to solve the problem of passing a cranked part (15) at right angle (16) through an orifice (21) of a joint (19) said joint (19) comprises a deformable notch (20). The sealing condition of the joint (19) and cranked part (15) system is thereby ensured by the presence of fir-shaped protuberances on the base (26) of the bent part (15).
Abstract:
The invention relates to a control valve retaining element (22) for a power brake system (10), comprising a hollow cylindrical body (28) and a first retaining collar (30) which is joined to the body (28) and has at least one side wall for supporting the end (20) of a bellows. To be able to produce such a retaining element more economically and position it easily and securely on an actuating rod (16) of a power brake system (10) a second retaining collar (36) extends from a first end of the body (28) radially inwards and in the peripheral direction. Said second retaining collar (36) has a first lateral face (38) which cooperates with a stop end (44) of the actuating rod (16) and a second lateral face (40) which is opposite the first lateral face (38) and cooperates with a compression spring (46).
Abstract:
The invention relates to a vacuum brake booster, comprising a valve piston (1) that can be axially displaced in a vacuum housing and has a pedal pressure rod (2), a control housing (3) and a flat-seat valve (4) joined to the valve piston (3), in addition to an air filter (5). The air filter (5) is arranged in the valve piston (1) and forms, in conjunction with a valve piston sealing seat (7) for an air filter (5) that can be placed thereon, an adjustable in-flow cross-section for outside air flowing through said flat-seat valve (4).
Abstract:
The invention relates to a wiring arrangement (2) in a vacuum servo brake (1), in which all electrical lines (11) are assembled in a cable harness or in a plastic housing (9). Pin-and-socket connectors (10) connecting the cable ends are provided for contacting the servo brake-integrated sensors and actuators. The wiring (2) links the control group (7) to the vacuum chamber (5) and bypasses the working chamber (6) and an opening in the flexible wall (4) separating the vacuum chamber and the working chamber.
Abstract:
A booster is disclosed in which a pair of contact members (43 and 45) constructed from electrically conductive material are adapted to contact each other when the booster is in an inoperative position. When the booster is operated the contact members (43, 45) move away from each other to operate a circuit for auxiliary equipment (52), for example brake lamps and/or an anti-lock (ABS) system.
Abstract:
Air-actuated brake servo comprising a pneumatic piston (5) sliding in a casing and housed in a tubular protective bellows (15) with a first end (15a) being connected to the casing (3). The piston carries a valve (7) and a purifying filter (14) placed between the valve and a pressure source (A). According to the invention, the bellows (15) is at least partially made of a porous and deformable material so that it forms the purifying filter.
Abstract:
Pneumatic motor vehicle brake servo comprising a shell (10) within which a piston (20) formed from a rear tubular part (22) supporting a skirt (14) defines, by means of an unfolding diaphragm (12), a front chamber (16) permanently connected to a vacuum source and a rear chamber (18) selectively connected to the front chamber (16) or to the atmosphere by a valve means (40) actuated by a control rod (34) capable of bearing, by means of a plunger (32), on one of the sides of a reactive disk (58) mounted on a push-rod (56). The valve means comprises a shutter co-operating by means of an active part (40) with a first valve seat (32a) formed on the plunger (32) and a second valve seat (20a) formed on the piston (20), the shutter (40) being normally urged forwards by resilient means (44). According to the invention, actuating means (60, 100, 160) are provided to urge the active part of the shutter (40) forwards while at the same time co-operating with the first (32a) and second (20a) valve seats.