Robert Boschgmbh

Volkswagen Ag

Robert Bosch Gmbh

Dieter Schwarzmann

Udo Sieber

Bernd Mueller

Siegbert Steinlechner

Tobias Mauk

Andreas Ortseifen

Michael Ungermann

Reiner Schweinfurth

Alexander Herrmann

Uwe Guenther

Florian Malchow

Nik Scharmann

Benjamin Hagemann

Christian Lammers

Simon Dierolf

Thomas Wieja

Christian Klein

Beate Leibbrand

Bodo Becker

Steffen Reinhardt

Ekkehard Hoffmann

Marco Martini

Markus Remlinger

Tobias Herrmann

Andreas Buse

Thomas Binnewies

Thomas Kessler

Florian Brunner

Ulrich Fass

Uwe Hammer

Ioan Serban

Markus Ganswind

Josef Maximilian Kurz

Christoph Wirth

The invention relates to a method for determining a loading of a soot filter with soot particles from an exhaust gas mass flow of an internal combustion engine in a motor vehicle, a control device for an internal combustion engine having a soot filter, and a computer program product for carrying out the method. In the first stepof the method a characteristic curve for the relationship between the exhaust gas mass flow, exhaust gas temperature, ambient pressure, and pressure drop across the soot filter without loading is determined; in the second stepa second exhaust gas mass flow and a second pressure drop that occurs during loading of the soot filter are determined; in the third step, from the characteristic curve the first pressure drop is determined for which the first and second exhaust gas mass flows have the same value; in the fourth stepan estimated value for the loading of the soot filter is computed via a real-time parameter estimation, preferably by use of the gradient method, based on the previously determined parameters. The method allows a reliable determination of the instantaneous loading of a particulate filter, regardless of the type of measuring signals used in each case for characterizing the loading behavior of the soot filter.

Method for determining the loading of a soot filter

The method for detecting a position error of an electronically commutated actuator drive between an assumed position and an actual position of the actuator drive includes performing a position control procedure for the position of the actuator drive. The method further includes providing data with regard to the assumed position of the actuator drive. The method further includes forming an electric space vector value to generate a component of a stator magnetic field that extends parallel with a direction of an exciter magnetic field that prevails in the case of the assumed position of the actuator drive. The method further includes detecting whether a movement of the actuator drive has occurred as a result of generating the component of the exciter magnetic field.

Method and device for detecting position errors of a rotor of an electronically commutated actuator drive

A method for operating an electronically commutated servo motor includes activating the servo motor by a voltage space vector generated in accordance with a commutation pattern on the basis of a predefined torque and a rotor position of a rotor of the servo motor in accordance with an optimization target. The method further includes predefining an activation range that indicates a range of permissible voltage space vectors. The servo motor is activated in such a way that only voltage space vectors within the activation range are used.

Method and device for operating an electronically commutated servo motor and position control unit having a servo motor

A method for calibrating a drive of a throttle valve of an internal combustion engine of a motor vehicle includes detecting whether the internal combustion engine is currently running or is not running. The method further includes activating the drive to displace the throttle valve into a target position if it is detected that the internal combustion engine is currently not running. The method further includes calibrating a characteristic at the target position. A correlation between a rotor position of the drive and an output voltage of a throttle valve angle transducer follows a characteristic.

Method and control unit for calibrating a drive of a throttle valve of an internal combustion engine in a motor vehicle

A method is provided for controlling the current intensity of the electric current flowing through an inductive consumer, the consumer being connected in series to a switching device and a current measuring unit, and in parallel to a free-wheeling element, and the switching device being activated for adjusting the current intensity during a pulse width modulation period. It is provided that a mean load voltage to be set during the pulse width modulation period is determined from an input current intensity with the aid of a first controller, the mean load voltage being set in the pulse width modulation period with the aid of the switching device at the consumer, the mean load voltage or a setpoint load voltage determined with the aid of a second controller from a predefined setpoint current intensity being fed to a model adapted to the consumer, and the input current intensity being ascertained from the difference between the predefined setpoint current intensity and a difference variable between an actual current intensity through the consumer and a model current intensity determined with the aid of the model. A circuit configuration for implementing the method is also provided.

Method for controlling the current intensity of the electric current flowing through an inductive consumer and a corresponding circuit configuration

A method for detecting a leak in an intake tract of an internal combustion engine involves operating the engine at two operating points and comparing a deviation of measured mass flows from expected mass flows at the first and at the second operating points.

Method and device for detecting leaks in the intake tract of an internal combustion engine

Growing community of inventors

Heilbronn, Germany

Dieter Schwarzmann