Robert Boschgmbh

Michael Kolitsch

Tobias Pfister

Dirk Samuelsen

Torsten Handler

Bernhard Kamp

Andreas Fritsch

Andreas Pfaeffle

Ralf Wirth

Andreas Genssle

Stefan Forthmann

Marcel Wuest

Katharina Schaenzlin

Werner Christl

Heribert Haerle

Sabine Rösch

A method for acquiring information from a driving operation of a vehicle, in which first information is acquired with respect to at least one operating state of the vehicle and additional second information is ascertained with respect to this at least one operating state using statistical methods, the first and second information concerning this at least one operating state being stored. A method for the assigning and diagnosis of at least one operating state of a vehicle, a control unit, a computer program and a computer-program product are also provided.

Method for acquiring information

A procedure to diagnose a particle filter disposed in an exhaust gas area of an internal combustion engine as well as a device to implement the procedure is proposed. Provision is made to ascertain the degree of efficiency of the particle filter on the basis of the upstream particle flow occurring upstream in front of the particle filter and on the basis of the downstream particle flow occurring downstream behind the particle filter. The ascertainment of the degree of efficiency of the particle filter allows for an On-Board-Diagnosis of the particle filter, with which compliance with specified exhaust gas threshold values can be assured.

Procedure to diagnose a particle filter and device to implement the procedure

A method for operating a sensor for recording particles in an exhaust gas flow and a device for carrying out the method are provided, in which at least one measure of the exhaust gas flow is ascertained and in which the measure of the exhaust gas flow is taken into consideration in the valuation of the particle sensor signal made available by the particle sensor. The procedure is based on the knowledge that the exhaust gas flow, for instance, the exhaust gas volume flow, has an influence on the particle sensor signal made available by the particle sensor, especially when the measuring effect is based on the depositing of particles on a sensor surface. Using the procedure, a possibly present cross sensitivity of the particle sensor with respect to different exhaust gas flows is taken into consideration, so that the measuring accuracy is increased.

Method for operating a sensor for recording particles in a gas stream and device for implementing the method

Described is a method for controlling a temperature downstream of a catalyst in the exhaust tract of an internal combustion engine including a first control loop in which a first control variable is calculated from a first deviation that is calculated from a first actual value and a first setpoint value and influences an intra-engine heat generation. In the process, the first actual value is determined as a measure of a temperature downstream of the catalyst. The method features a second control loop in which at least one second control variable is calculated from a second deviation that is calculated from a second actual value and a second setpoint value; a temperature upstream of the catalyst being determined as the second actual value. Also described is a controller which controls the sequence of such a method.

Method and controller for exhaust gas temperature control

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Weissach, Germany

Michael Kolitsch