Robert Boschgmbh

Dr. Ing. H.c. F. Porsche Aktiengesellschaft

Audi Ag

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Andreas Blumenstock

Helmut Denz

Ernst Wild

Klaus Winkler

Eberhard Schnaibel

Georg Mallebrein

Andreas Koring

Rainer Frank

Guenther Riehl

Helmut G Schwegler

Holger Bellmann

Hans Neu

Bernd Schumann

Klaus Ries-Mueller

Erich Schneider

Erwin Krimmer

Wolfgang Schulz

Werner Mezger

Ulrich Steinbrenner

Tilman Miehle

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Thomas Wahl

Manfred Zimmermann

Thorsten Fritz

Michael Baeuerle

Lutz Reuschenbach

Gholamabas Esteghlal

Udo Diehl

Stefan Reimer

Karsten Mischker

Volker Beuche

Bernd Rosenau

Christian Grosse

Hermann Gaessler

Juergen Schiemann

Rainer Walter

Manfred Mezger

Rene Schenk

Klaus Ries-Muller

Joachim Berger

Ulrich Kuhn

Martin Mast

Juergen Gras

Winfried Kuhnt

Andreas Pape

Stephan Uhl

Stephan Pelters

Michael Nicolaou

Oliver Schlesiger

Michael Hermann

Siegfried Wesinger

Johann Siebler

Kurt Almstadt

Axel-Rene Michelet

Werner Krauss

A method for operating a fuel vapor recirculation system in a motor vehicle having a fuel tank. In the method, in the operating strategy of the fuel vapor recirculation system, predictive route data of the motor vehicle are taken into account.

Method for operating a fuel vapor recirculation system in a motor vehicle

A method for operating an internal combustion engine by introducing air, in which the air is conducted into the induction region of the internal combustion engine following shutoff of the internal combustion engine. If necessary, the intake valves and the exhaust valves of at least one cylinder are moved into a position in which at least one intake valve and one exhaust valve of a combustion chamber of the internal combustion engine are open simultaneously. The method may be used in for an internal combustion engine having an electric turbocharger for the introduction of air.

Method and device for operating an internal combustion engine

A control for diagnosing a catalytic converter in the exhaust gas of an internal combustion engine having means for determining the catalytic converter temperature is presented. The diagnostic method is carried out in dependence upon the catalytic converter temperature. In the diagnosis, only such results are used which have been determined below a threshold value for the catalytic converter temperature.

Method for control of a diagnosis of a catalyst in the exhaust of an internal combustion engine

A method and a device for operating an internal combustion engine having a plurality of cylinders are described, each cylinder having at least one intake valve and one exhaust valve having fully variable valve control, a fuel feed to at least one first cylinder of the plurality of cylinders being deactivated, a first quantity of fresh air being drawn in by opening the at least one intake valve of the at least one first cylinder in a first downward movement of the piston of the at least one first cylinder, and a second quantity of fresh air being ejected by opening the at least one exhaust valve with a first upward movement of the piston of the at least one first cylinder.

A method for operating an internal combustion engine (), especially of a motor vehicle, is described. Air and fuel are supplied to a combustion chamber () of the internal combustion engine () and exhaust gas is recirculated to the combustion chamber (). The exhaust gas is recirculated to the combustion chamber () during overrun operation of the internal combustion engine ().

Method for operating an internal combustion engine especially of a motor vehicle

A method for operating a catalytic converter arranged in the exhaust gas of an internal combustion engine. The composition of exhaust gas being controlled in front of the catalytic converter by adding a reducing agent that promotes the regeneration of the catalytic converter. The composition of the exhaust gas being detected with the aid of an exhaust-gas sensor positioned downstream from the catalytic converter. A time lag between the start of controlling the composition of the exhaust gas in front of the catalytic converter and the detection of a change in the composition after the catalytic converter are evaluated. In order to be able to determine the end of a regeneration phase of the catalytic converter in a safe and reliable manner, the gradient of an output signal of the exhaust-gas sensor is evaluated.

Method for operating a catalyst

An internal combustion engine, especially for a motor vehicle, is described, which is provided with a catalytic converter which can be charged with hydrocarbons. The converting capability of the catalytic converter can be determined by a control apparatus. The converting capability of the catalytic converter is determined by the control apparatus by means of a combination of a passive and an active diagnostic method ( ).

Method for operating and internal combustion engine, in particular of a motor vehicle

An internal combustion engine in particular for a motor vehicle is described, which is provided with a storage catalytic converter, which is filled with and emptied of nitrogen oxides. Using the control unit, a plurality of aging conditions of the storage catalytic converter can be determined. Using the control unit, a reversible aging curve and a non-reversible aging curve can be determined from the aging conditions.

Method for operating a storage catalyst of an internal combustion engine

An internal combustion engine, especially for a motor vehicle, is described, which is provided with a storage catalytic converter which can be loaded with and unloaded of nitrogen oxides. Several states of deterioration (points ) of the storage catalytic converter can be determined by the control apparatus. A sulphur content of the fuel used can be determined by the control apparatus from sequential states of deterioration (points ).

Method for operating an accumulator-type catalytic converter of an internal combustion engine

An internal combustion engine ( ), especially for a motor vehicle, is described, which has a three-way catalytic converter ( ) and a storage catalytic converter ( ) which can be loaded with and unloaded of nitrogen oxides. A diagnosis of the storage catalytic converter ( ) is carried out by a control apparatus ( ) below a temperature at which the three-way catalytic converter ( ) does not yet operate.

Method for operating a three-way catalyst of an internal combustion engine

An internal combustion engine ( ), especially for a motor vehicle, is described, which has a catalytic converter ( ) which can be loaded with and unloaded of nitrogen oxides. An NOx sensor ( ) is provided with which NOx emissions can be measured downstream of the catalytic converter ( ). The catalytic converter ( ) can be only partially loaded by a control apparatus ( ). An increased NOx emission can be generated forward of or in the catalytic converter ( ) by the control apparatus ( ). A conclusion can be drawn as to the operability of the catalytic converter ( ) by the control apparatus ( ) from NOx emissions measured downstream.

Method for operating the catalyst of an internal combustion engine

The invention is directed to a control of an air/fuel ratio during operation of an internal combustion engine having a catalytic converter and an NOx sensor mounted behind the catalytic converter as seen in flow direction. The engine is operated alternately in a first phase with a mixture which is deficient in fuel compared to the stoichiometric mixture composition and, in a second phase, with a stoichiometric or rich mixture composition. The triggering of the change between the two phases is influenced by the signal of the NOx sensor.

Method and arrangement for operating an internal combustion engine in combination with an NOx storage catalytic converter and an NOx sensor

A method is presented for controlling the supply of reducing agent to a NOx-storage catalytic converter of an internal combustion engine, which is operated at least at times with a lean air/fuel mixture, with an exhaust-gas sensor mounted in flow direction rearward of the NOx-storage catalytic converter; wherein the supply of the reducing agent takes place repeatedly in time intervals separate from each other; and wherein the reducing agent quantity, which is supplied in each time interval, is reduced compared to that quantity which is supplied in a previous supply phase in which a reaction of the exhaust-gas sensor occurred.

Running of an internal combustion engine in conjunction with an NOx-accumulator catalytic converter

The invention is directed to a method for detecting a filling or tanking operation on a receptacle. The pressure is measured to obtain a trace of pressure as a function of time which is characteristic for a tanking operation. A conclusion that a tanking operation is present is made from the trace.

Method for detecting a tanking operation on a receptacle

The disclosure is directed to a method for improving the exhaust-gas quality, which is reduced by sulfur influence, in combustion processes with exhaust-gas catalytic converters. In the method, the oxygen storage capability of the catalytic converter is determined and is compared to a threshold value. When there is a drop below the threshold value, the exhaust-gas temperature is increased and/or an exhaust-gas composition, which acts in a reducing manner, is generated forward of the catalytic converter.

Method for regenerating a catalytic converter

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Ludwigsburg, Germany

Andreas Blumenstock