Robert Boschgmbh

Siemens Aktiengesellschaft

Thomas Rader

Alexander Haeussler

Thomas Glasstetter

Manfred Gerdes

Achim Przymusinski

Helmut Wiss

Andreas Erban

Frank Kaestner

Ralf Schernewski

Ralf Gutmann

In a method and a device for the control of a vehicle brake system, the setpoint values for each wheel are corrected based on the difference between brake pressures in at least one wheel brake of two different brake circuits.

Method and device for the control of a brake system

A method and a device for determining a characteristic value of a wheel brake are described. The characteristic value here is the brake characteristic value, which representing the relationship between the braking torque or braking force and the brake pressure of a wheel brake operated hydraulically. This brake characteristic value is determined individually for each wheel by calculations based on wheel-specific variables.

Method and device for determination of a wheel brake parameter

A control circuit for a controllable electric solenoid valve of a brake system of a motor vehicle is described, in which the actual values of a controlled variable (f(t)), e.g., the vehicle deceleration, a wheel slip, a driving speed, an angle of rotation or the like are returned to a predetermined tolerance band. The actual value of the controlled variable is measured continuously and compared with the predetermined tolerance band, which is stored in an EEPROM, for example. If the actual value of the controlled variable leaves the predetermined tolerance band (), a correction device () intervenes and returns the actual value to the predetermined tolerance band by increasing or decreasing the trigger current for the solenoid valve ().

Control circuit for a controlled electro-magnetic valve of an automotive braking system

A method and a device are proposed for driving a solenoid valve that has stroke ranges of a stable equilibrium of forces and stroke ranges of an unstable equilibrium of forces. For setting the predetermined differential pressure across the solenoid valve, a driving signal quantity is generated which is selected such that the stroke ranges of an unstable equilibrium of forces are avoided or the dwell time of the solenoid valve in these ranges is reduced.

Method and device for driving a solenoid valve

Pressure fluctuations occurring during two sequential injections (for example a pre-injection and a main injection) within a working cycle of a cylinder in a lead to the injector are taken into account with the aid of a correction term. A drive time of the injectors is determined with the aid of a corrected pressure so that a desired fuel quantity is injected. The correction term is determined with the aid of a least-squares estimator that estimates the injection pressure at the nozzle of injector as a function of the geometrical data of the system, in particular a length of the lead from the rail to the injector and physical boundary conditions, for example a fuel temperature.

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Reutlingen, Germany

Thomas Rader