Continental Teves, Ag and Company Ohg

Itt Manufacturing Enterprises, Inc.

Jochen Führer

Gregor Schmitt

Stefan A Drumm

Robert Schmidt

Marco Besier

Johann Jungbecker

Steffen Linkenbach

Thorsten Ullrich

Vladimir Koukes

Christian Albrich Von Albrichsfeld

Mathias Niepelt

Ralf Herbst

Michael Zydek

Jürgen Böhm

Harald Biller

Thomas Berthold

Bernhard Giers

Alexander Kolbe

Josko Kurbasa

Michael Vogt

Christof Klesen

Zlatko Penzar

Georg Fachinger

Thorsten Neu

Lothar Kienle

Heinz Zingel

Markus Jäger

Ulrich Baiter

Jürgen Karner

Timo Gurzawski

Stefan Krebs

Method and control device for determining a steering angle of a motor vehicle, wherein a theoretical steering angle is calculated by a vehicle model and a measured steering angle is determined with a steering angle sensor, and the difference between the measured and theoretical steering angles is determined, wherein at least one data record including a number of successive measured values is acquired, and a correction constant for the measured steering angle is determined from the mean value of the differences between the theoretical steering angle and the measured steering angle. According to the invention, a confidence level, which changes incrementally between successive data records, is calculated by travel conditions present during the acquisition of the data record and/or an analysis of the data record.

Determination of steering angle for a motor vehicle

A method for the operation of a brake system having two brake circuits, with a recuperative brake, in particular an electrical generator, a master brake cylinder and a brake pedal simultaneously achieve optimized use of the regenerative braking and a constant braking experience for the driver with the highest safety requirements. When there is a braking demand by the driver with an associated desired braking torque and a first condition is met, at least one outlet valve is opened and brake fluid is conducted with an associated volume of brake fluid into at least one reservoir and the at least one outlet valve is then closed if a second condition is met. The first condition is met if a braking variable corresponding to the braking demand is not less than a specified minimum value. The second condition is met if the volume of brake fluid has flowed into the reservoirs.

Method for operating a brake system, brake systems in which the method is carried out and motor vehicles comprising said brakes systems

A method for monitoring a brake system for motor vehicles. The system can be actuated both by a vehicle driver and independently of the vehicle driver in what is known as a brake-by-wire mode. The hydraulic actuation device can be actuated by means of a brake pedal and has a main brake cylinder to which wheel brakes are connected, at least two brake circuits, a simulation device, which comprises at least one elastic element and gives the vehicle driver a comfortable pedal feeling, an electrically controllable pressure-providing device, which is formed by a cylinder/piston assembly, the piston of which can be actuated by an electromagnetic actuator, wherein the first measurement variable (P) characterizing a position of the piston is detected. The detected measurement value of the first and second measurement variable (S, P) are compared to a predetermined characteristic map of the first and second measurement variables in order to monitor a functional status of the brake system.

Method for monitoring a brake system and brake system

A system and method for operating a brake system for motor vehicles, includes a master brake cylinder actuated by a brake pedal and separably connected to at least one hydraulically acutuatable wheel brake by at least one brake circuit, a hydraulically operable pedal travel simulator is connectable to the master brake cylinder, an electrically controllable pressure provision apparatus is separably connected to the brake circuit, and an electronic open-loop and closed-loop control unit. Upon brake pedal actuation, a pressure of the pressure provision apparatus is applied to the brake circuit in a first operating mode and the pressure of the master brake cylinder is applied to the brake circuit in a second operating mode. In the event of transition from the second operating mode to the first operating mode while the brake pedal is actuated, the actuation travel of the brake pedal is adjusted by electronic open-loop or closed-loop control.

Method for operating a brake system for motor vehicles, and brake system

Disclosed is a method for controlling a regenerative brake system with a number of friction brakes (F) and an electro-regenerative brake (R), whose total deceleration is composed of deceleration components of the brakes, and the actual deceleration components are desired to correspond to the nominal deceleration components as exactly as possible. A control unit is used to change the ratio of the nominal deceleration components of a number of brakes (R, F) relative to each other by determining a correction value (k, k) for a number of the brakes based on the quantities of efficiency w of a number of brakes representing the ratio between the actual deceleration (a) and the nominal deceleration (a), which correction value is applied to the nominal deceleration (a) of these brakes.

Method for controlling a brake system of a motor vehicle

In a method for determining a steering angle for a vehicle, a steering angle is determined using a single-track model of the vehicle, wherein the steering angle is corrected only if the difference between the derivative of a measured steering lock angle and the derivative of a calculated steering lock angle is below a threshold value. Otherwise the measurement is repeated.

System and method for determining a steering lock angle of a vehicle

Disclosed is a brake system of the 'brake-by-wire' type for actuating a motor vehicle brake system having a brake booster which is operable in response to the driver's input by a brake pedal and to an electronic regulating and control unit. A device is provided to decouple a force-transmitting connection between the brake pedal and the brake booster in the 'brake-by-wire' operating mode. The electronic regulating and control unit () includes a control circuit for controlling the travel (S) covered by the output member () of the brake booster (), the nominal value (S) of the travel (S) covered by the output member () of the brake booster () is calculated corresponding to the actuating travel (S) of the brake pedal (), and a monitoring module () is provided which, in the case of a fault such as the inclusion of air or brake circuit failure, performs a partial compensation of the extension of the travel (S) covered by the output member () of the brake booster (), which extension is caused by the fault.

Brake system

A method of controlling a brake system of an all-wheel driven motor vehicle, which includes an electro-regenerative brake and a number of friction brakes such that a total brake torque comprises brake torque components of the friction brakes and of the electro-regenerative brake; the brake torque of the electro-regenerative brake is subdivided between the front axle and rear axle in predetermined ratios. The brake torque generated by the electro-regenerative brake is limited to such an extent that the brake slip of one axle of the motor vehicle does not exceed a selectable maximum value.

Method for controlling a brake system of a motor vehicle with all-wheel drive

In a method, which is intended for a motor vehicle with a regenerative and an anti-lock conventional brake system (ABS) and is used for coordinating the application of the regenerative and the anti-lock system, the regenerative brake system is switched off upon entry into an ABS control, however, upon termination of the ABS control or ABS control phase, regenerative braking is admitted again in dependence on the respective driving situation and/or criteria representative of the brake demand and the instantaneous coefficient of friction, in a modified form as compared to the regenerative braking operation prior to the entry into the ABS control mode.

Co-ordination method for a regenerative and anti-skid braking system

A method for detecting a rough road section in a vehicle route comprises the following steps: sensing the acceleration of the vehicle with an acceleration sensor, evaluating the acceleration at several points of time, and detecting the rough road section with regard to the evaluation results. A device for detecting a rough road section in a vehicle route comprises an acceleration sensor for sensing the acceleration of a vehicle, an evaluation device for evaluating the acceleration at several points of time, and a detection device for detecting the rough road section with regard to the evaluation results. A speed control method according to the present invention comprises the following steps: detecting a rough road section, and fixing a nominal speed in response to the detection. A speed control system includes a rough road detection device and a speed controller which controls the speed of the vehicle according to the rough road detection.

Method and device for detecting a rough road section

Process for operating a hydraulic brake system

Method of operating a pneumatic brake booster

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Darmstadt, Germany

Jochen Führer