Robert Boschgmbh

Klaus Landesfeind

Wolfgang Schuller

Edgar Kurz

Massimiliano Ambrosi

Rainer Kallenbach

Michael Eisenlauer

Wolf Stahr

Stefan Otterbein

Dieter Kunz

Carsten Bodmann

Frank Baehrle-Miller

Edith Mannherz

Eberhardt Schunck

Jens Norberg

Rainer Heinsohn

Hubertus Wienken

Stephan Steingass

Thomas Weitze

Thomas Braun

Peter Meissner

Marcus Ertle

Klaus-Dieter Nijakowski

Ronny Goepfert

Christian Laier

Mathias Bieringer

Dirk Ortlinghaus

Gerhard Kachel

Manfred Maerz

Michael Dinkelacker

Friedhelm Burkard

Edwin Staib

Christoph Brand

Mike Gansler

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.

Hydraulic brake system for a vehicle, and corresponding operating method

A bistable solenoid valve for a hydraulic brake system, includes a guide sleeve, in which an upper and a lower non-moving pole core are arranged fixedly and a closing element is arranged movably, wherein the closing element penetrates into a valve seat during a closing movement and lifts up from the valve seat during an opening movement. The closing element is connected fixedly to a permanent magnet, wherein the permanent magnet is positioned between the lower and the upper pole core. A coil group is positioned around the guide sleeve and substantially encloses the guide sleeve. The coil group includes at least two coils, wherein the coil group is configured in such a way that an actuation of a movement of the closing element takes place by means of an activation of the at least two coils.

Bistable solenoid valve for a hydraulic brake system, and method for actuating a valve of this type

A bistable solenoid valve for a hydraulic brake system has a guide sleeve in which an upper immovable pole core is fixedly arranged and a closing element is displaceably arranged. The closing element is forced into a valve seat during a closing movement and lifts off from the valve seat during an opening movement, and is fixedly connected to a magnet assembly. An actuation of the movement of the closing element is performed by the magnet assembly via a coil positioned around and substantially surrounding the guide sleeve. A lower immovable pole core is fixedly arranged in the guide sleeve and the magnet assembly is positioned between the lower and the upper pole core.

Bistable solenoid valve and method for assembling a bistable solenoid valve

A solenoid valve for controlling the braking pressure of a wheel brake of a slip-controllable hydraulic brake system of a motor vehicle includes an armature, a valve insert, a valve seat, a valve element, and a spring device. The valve element is arranged in the valve insert in a longitudinally displaceable manner and acts together with the valve seat. The spring applies a force acting in the direction of opening with respect to the valve seat to the valve element in the installed position. The valve element can be actuated by an electromagnetic actuator in the closing direction with respect to the valve seat. The valve element is arranged between an anchor and the valve seat and is operatively connected to the anchor. A front face of the valve element facing the anchor has at least one projection and the projection defines a point of contact with the anchor.

Solenoid valve for controlling the braking pressure of a wheel brake and tool for producing its valve element

A method is for closing a solenoid valve in which the solenoid valve is charged with a first current value that results in a first closing of the solenoid valve, and the solenoid valve is subsequently charged with a second current value that results in a renewed partial opening of the solenoid valve, and the solenoid valve is subsequently charged with a third current value that results in a second closing of the solenoid valve, the third current value being selected such that the second closing takes place with a higher closing speed of the solenoid valve than does the first closing.

Method for reliably closing a solenoid valve

A method and a device are provided for producing an error signal and carrying out measures based thereon in a motor vehicle equipped with a wheel-slip control system and/or a wheel deceleration control system. At least one function variable representing the functionality of the wheel-slip control system and/or wheel-deceleration control system may be monitored for an error and if at least one error is detected, the value of at least one error counter may be incremented. When there is at least one detected error, at least one error signal may be output when the value of at least one error counter exceeds a predeterminable limiting value. For at least one error counter, at least two different, predeterminable limiting values coexist simultaneously, and when each of these is exceeded by the counter reading of the at least one error counter, different error signals may be output.

Method and device for treating suspected errors

A device for a vehicle equipped with a wheel slip control system is described as having a determination device for determining first variables, each of which may be assigned to one wheel and/or the associated wheel brake. In addition, it includes a calculation device in which at least one second variable is calculated for at least one wheel axle of the vehicle from the first variables associated with the wheels of this wheel axle, this second variable being a measure of the difference between the first variables associated with this wheel axle. In addition, this device includes an averaging device in which a third variable is determined by averaging over time and/or filtering the at least one second variable, and it includes a comparator device which compares the value of the third variable with a preselectable limit value. The averaging and/or filtering in the averaging device covers such a long period of time that the third variable determined there is a measure of a difference between the values of the first variables associated with this wheel axle from one another which is not due to an intervention by the wheel slip control system, and the device is used to detect a pull brake or a pull drive.

Device and method for diagnosing brake and drive pull

The present invention relates to an arrangement for monitoring the driving condition of a vehicle, having means for generating a steering angle signal (L) and means for generating a transverse acceleration signal (a), means being provided for comparing a signal derived from the steering angle signal Lto a maximum steering angle signal, means being provided for comparing a signal derived from the transverse acceleration signal (a) to a maximum transverse acceleration signal, and a variable (F) that describes the driving condition of the vehicle being derivable from the comparison. The present invention also relates to a method of monitoring the driving condition of a vehicle.

Assembly and method for monitoring the driving condition of a vehicle

A device for monitoring a pressure sensor, which is positioned in a braking system of a vehicle. For this purpose, the device contains arrangement with which, during a braking action, a first vehicle motion variable is ascertained, which characterizes a vehicle motion in the longitudinal direction. The device further includes arrangement with which a mass variable is ascertained, which characterizes the mass of the vehicle. Using further arrangement, it is ascertained, for the monitoring of the pressure sensor, whether the first vehicle motion variable lies within a value range for the first vehicle motion variable, whose limits are ascertained as a function of the mass variable.

Device and method for monitoring a pressure sensor

System for generating signals for control or regulation of a chassis

The invention is based on a method and system for regulation and/or control of an automobile chassis where between the vehicle body and at least one wheel there is at least one actuator actuated by actuation signals for exertion of forces between the vehicle and the at least one wheel. At least parts of the actuation signals are so formed that the vertical movements of the vehicle body will be damped inertially. According to the invention, at least parts of the actuation signals (Fij) are so formed that the damping takes place dependent on the magnitude of the vertical velocity (Zaij') of the vehicle body.

Method and system for regulation and/or control of an automobile chassis

Described is a process for conditioning of sensor signals for at least one of undercarriage regulation and control. The objective of this process is to superimpose on processed first signals which represent the acceleration of the vehicle body the low-frequency information absent from the signal of a vehicle body acceleration sensor by a circuit of simple design through a defined superimposition with the sensor signals corresponding to at least one of the spring deflection path and the spring deflection velocity. For that purpose, the sensor signals to be superimposed are processed in filter units whose transfer functions show a specific functional correlation.

Method of generating control/regulation signals for a vehicle chassis

An apparatus for damping courses of motion between two bodies in which a dynamic wheel load (C.sub.r) can be reduced by intervention in a damping element of a frequency-dependent increase in the passive spring rigidity of a spring element, in order to vary the dynamic wheel loads in the direction of a reduction. The apparatus is intended for use in on-road vehicles.

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Backnang, Germany

Klaus Landesfeind