Robert Boschgmbh

Werner Christl

Dirk Samuelsen

Torsten Handler

Bernhard Kamp

Ralf Wirth

Katharina Schaenzlin

Michael Kolitsch

Heribert Haerle

Sabine Rösch

A method for controlling an exhaust-gas aftertreatment system of an internal combustion engine having at least two SCR catalytic converters connected in series. The exhaust-gas aftertreatment system has a bypass including a bypass valve around the first SCR catalytic converter, and exhaust gases of the internal combustion engine are routed around the first SCR catalytic converter via the bypass. The method includes: ascertaining an activation of an exhaust brake operation; ascertaining a first actual temperature for the first SCR catalytic converter; ascertaining an actual NH3 storage level for the first SCR catalytic converter; ascertaining a modeled, maximally permitted NH3 storage level as a function of the actual NH3 storage level; ascertaining a future temperature for the first SCR catalytic converter; ascertaining a comparison as a function of the ascertained first actual and future temperatures; actuating the bypass valve as a function of the ascertained comparison, opening the bypass valve.

Method for controlling an exhaust-gas aftertreatment system of an internal combustion engine having at least two SCR catalytic converters connected in series

A method for operating a hybrid motor vehicle. In one example, the vehicle comprises an internal combustion engine () and at least one electric motor (). As long as at least one parameter of an exhaust gas aftertreatment system () of the internal combustion engine () lies outside a given range, the starting of the internal combustion engine () is delayed and the internal combustion engine () is dragged by the electric motor (). At the same time at least one measure is carried out which changes the parameter.

Method for operating a hybrid motor vehicle

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

A method and a device for implementing a method for ascertaining the load condition with an exhaust-gas component of a component arranged in an exhaust-gas region of an internal combustion engine is provided in which an increase in the exhaust-mass flow of the internal combustion engine and a detection of a pressure change in the exhaust-gas region in front of the component is specified. The load condition of the component is determined from the pressure change.

Method and device for implementing a method for ascertaining the load condition of a component arranged in an exhaust-gas region of an internal combustion engine

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Moeglingen, Germany

Werner Christl