Robert Boschgmbh

Wolf-Dieter Jonner

Heinz Leiber

Guenther Schmidt

Karl-Heinz Willmann

Alfred Sigl

Roland Holzmann

Helmut Pueschel

Reinhard Gutzeit

Volker Braschel

Elmar Mueller

Dieter Roller

Anton Van Zanten

Hans-Juergen Herderich

Hans-Joerg Fees

Thomas Isella

Rolf Hummel

Rainer Altmann

Karl Veil

Kasimir Stromski

Harald Hellmann

Rainer Lauer

Johann Herr

Martin Moehle

Guenter Dzierzawa

Norbert Alaze

Wolfgang Maisch

Gerhard Wetzel

Ulrich Gottwick

Guenter Wolff

Alwin Stegmaier

Juergen Hachtel

Rolf Becker

Andreas Klug

Michael Schubert

Harald Ott

Guenter Kaes

Eberhardt Schunck

Rainer Heinsohn

Klaus Schmidt

Wolfgang Bernhardt

Juergen Breitenbacher

Lothar Kirstein

Werner Wilde

Martin Pfau

Michael Tischer

Ortwin Engfer

Arnold Pahl

Guenter Krenz

Dietmar Rischen

Peter Zeiner

Hermann Kaess

Reiner Folke

Erika Mank

Jurgen Anlauf

Jurgen Binder

Andreas Kaessmann

Herbert Demel

Gerd Reimann

Wolfgang Korasiak

Armin Czinczel

Hermann-Josef Goebels

Anton V Zanten

Jurgen Zechmann

Hans-Herbert Wupper

Peter Pajonk

A method for providing a signal, representing the longitudinal inclination of a vehicle, for a control unit for the slip control and/or for the control of a quantity describing the yaw rate of the vehicle, measured quantities which can be acquired and processed for ascertaining a signal representing a longitudinal inclination of the vehicle, and/or the ascertained signal representing the longitudinal inclination being transmitted from a control device for the headlight-leveling control to the control unit for the slip control and/or for the control of the quantity describing the yaw rate.

Method for providing a quantity representing the longitudinal inclination of a vehicle

A hydraulic vehicle brake system in which normal service brake operation can be carried out by using external hydraulic energy, and in the event of a lack of external hydraulic energy, auxiliary brake operation by muscle power is possible, with a hydraulic transmission that comes from a master cylinder that can be actuated by means of the brake pedal. The external hydraulic energy is stored, for example, in an accumulator with a gas buffer, which can lead to a gas content in the hydraulic fluid for the service brake operation. The system includes a dual-circuit master cylinder associated with those wheel brakes of a vehicle axle that make a higher contribution to the vehicle deceleration and at the same time, cylinder/piston devices are installed between these wheel brakes and their associated service brake valves for the purpose of preventing hydraulic fluid from getting into these wheel brakes from the external energy source. The advantage is that neither gas nor air is carried into the wheel brakes where it could lead to the formation of bubbles in the event of a pressure drop and would be disadvantageous for an auxiliary brake operation by the master cylinder. The cylinder/piston devices increase the operational safety of the vehicle brake system when braking by muscle power.

Hydraulic vehicle braking system

Hydraulic brake system with anti-lock arrangement for a vehicle

The invention relates to a hydraulic vehicle brake system with a master cylinder, with two brake circuits (I, II), with wheel brakes connected to the brake circuits (I, II), and with a wheel slip regulator device disposed between the master cylinder and the wheel brakes, which device has at least one brake pressure modulation valve device and at least one high pressure pump, and with a pump unit associated with this high pressure pump. In the automatic braking operation by means of at least one of the high pressure pumps, the pump unit is used for supplying hydraulic fluid to the high pressure pump. The pump unit has a low pressure pump in the form of a gear pump. To limit the pressure at an outlet of the low pressure pump at least one return flow conduit is provided between this outlet and an inlet, which conduit, in a manner according to the invention constitutes a throttle by which the choice of its cross section, which throttle is for controlling at least one return flow which increases with increasing pressure at the outlet and as a result achieves the pressure limiting. The hydraulic vehicle brake system can be used for cars, minibuses, and small trucks.

Hydraulic vehicle brake system with wheel slip regulator device

Vehicle hydraulic brake system

During ASR control of spinning drive wheels, the pressure level in the wheel brake with the highest pressure level is modulated by driving a switching valve USV which affects the pressure in all the wheel brakes of the brake circuit, whereas the pressure level in the other wheel brake or brakes is controlled by way of wheel-specific inlet and outlet valves. The intake control valve ASV is kept open through the entire ASR control period. As a result, the electrically actuated ASV can be replaced by a hydraulically actuated ASV.

Method and apparatus for controlling the brake system of a vehicle

Hydraulic brake system with anti-lock and drive slip control device, for

Anti-skid brake control system

A known vehicle brake system having an anti-lock system has at least one return pump in this anti-lock system, by means of whose pumping pressure a throttle valve located between the master brake cylinder and the at least one wheel brake can be controlled via a control inlet, during an anti-lock mode, out of the normal position into a throttling position, counter to the force of an opening spring. The throttle valve serves to limit brake pressure rise speeds in the wheel brake during an anti-lock mode. It is disadvantageous that upon termination of such an anti-lock mode, the throttle valve hinders the return flow of pressure fluid out of the wheel brake to the master brake cylinder. Brake pressure reductions are therefore delayed. A throttle valve and connected in accordance with the invention has a second control inlet, which communicates with the wheel brake. The wheel brake pressure, upon termination of braking with anti-lock operation, is used as control pressure for opening the throttle valve, which as a result reaches its normal open position earlier and faster.

Hydraulic anti-lock vehicle brake system for a vehicle

A known hydraulic vehicle brake system has an anti-skid valve assembly. By this assembly, the at least one wheel brake can be temporarily disconnected from the master brake cylinder and connected to one inlet of a return pump, which furnishes the quantities of pressure fluid flowing out of the wheel brakes both to a damper chamber and, via a damper throttle, to the master brake cylinder and/or the at least one wheel brake. The disadvantage is that all of the pressure fluid pumped by the return pump can sometimes reach the master brake cylinder, disagreeably moving the brake pedal in the direction of its outset position. This can annoy a driver and should be avoided. The improved vehicle brake system has a valve, which in anti-skid operation can be blocked, located between the damper throttle and the master brake cylinder and also has a bypass throttle bypassing the valve. As a result, during anti-skid operation, the brake pedal is not displaced to such an annoying extent.

Hydraulic vehicle brake system with anti-skid apparatus

Electronically controlled brake effort proportioning system

A brake system having a master brake cylinder that communicates via brake lines with wheel brake cylinders, a check valve and shutoff valves for the wheel brake cylinders, for anti-skid control, are each incorporated in the master brake lines. A line branches off from the master brake line downstream of the control valve and is adjoined by a return pump, which communicates with the master brake line downstream of the control valve via a return line.

Brake system

When the vehicle speed falls below a predetermined reference speed, the measured vehicle deceleration is used to calculate an extrapolated time when the vehicle will be brought to a complete stop. When the extrapolated time is reached, the brake pressure is automatically applied and maintained until a desired departure is indicated.

Automatic locking brake

A vehicle brake system having at least two brake pressure lines, via which a master brake cylinder communicates with wheel brake cylinders, at least one valve is incorporated in each brake pressure line to close the brake pressure lines in the event of anti-skid control. Each brake pressure line is also assigned a return pump, which bypasses the valve. At least one valve, in the currentless state or with the absence of pressure buildup in a brake pressure line, blocks this brake pressure line and communicates with a control unit for pulsed opening upon pressure buildup in the brake pressure line. Because of the additional disposition of a pressure valve and check valve in a bypass around the pulsed valve, expensive pressure reducers are dispensed with, with little additional expense in the anti-skid control system. Even if the anti-skid control system fails, stability during braking is assured.

Anti-skid brake system for a vehicle

Growing community of inventors

Beilstein Schmidhausen, Germany

Wolf-Dieter Jonner