Patent application number | Description | Published |
20090151326 | METHOD FOR THE DIAGNOSING OF A CATALYTIC CONVERTER LOCATED IN AN EXHAUST GAS FLOW, AND DEVICE FOR CARRYING OUT SAID METHOD - Disclosed are a method and a device for diagnosing a catalytic converter ( | 06-18-2009 |
20110118959 | METHOD AND APPARATUS FOR DETERMINING AND REGULATING AN EXHAUST GAS RECIRCULATION RATE OF AN INTERNAL COMBUSTION ENGINE - The invention relates to a method and an apparatus for determining an exhaust gas recirculation rate in an internal combustion engine, in which the exhaust gas recirculation rate indicates a proportion of exhaust gas in a gas quantity delivered to a cylinder of the internal combustion engine, and combustion takes place in the cylinder of the engine cyclically during a combustion phase. The method includes the steps of ascertaining a combustion course statement over the course of combustion in the cylinder of the engine, and ascertaining an actual exhaust gas recirculation rate from the combustion course statement with the aid of a predetermined exhaust gas recirculation rate function. The invention further relates to a method and an apparatus for regulating an exhaust gas recirculation rate in an internal combustion engine, in which the exhaust gas recirculation rate indicates a proportion of exhaust gas in a gas quantity delivered to a cylinder of the internal combustion engine, and combustion takes place in the cylinder of the engine cyclically during a combustion phase. The method includes the steps of ascertaining a combustion course statement over the course of combustion in the cylinder of the engine, furnishing a set-point statement as a function of an operating point of the engine, and performing a regulation to compensate for a deviation that results from the set-point statement and the combustion course statement. | 05-19-2011 |
20110238283 | METHOD AND APPARATUS FOR REDUCING UNCONTROLLED COMBUSTION IN AN INTERNAL COMBUSTION ENGINE - The invention relates to a method for reducing uncontrolled combustions in an internal combustion engine, which occur independently of the ignition by a spark plug, wherein uncontrolled combustions are detected in the internal combustion engine ( | 09-29-2011 |
20130068197 | METHOD AND DEVICE FOR CONTROLLING THE EXHAUST GAS RECIRCULATION RATE FOR INTERNAL COMBUSTION ENGINES DURING LEAN OPERATION - A method for setting an exhaust gas recirculation rate in an engine system having an internal combustion engine, the exhaust gas recirculation rate indicating the portion of the exhaust gas recirculated into one cylinder of the internal combustion engine with regard to the total gas quantity present in the cylinder, including: operating the internal combustion engine according to an input for the exhaust gas recirculation rate, an ignition of an air/fuel mixture being carried out in the cylinder at a certain ignition timing; adjusting the ignition timing in the cylinder of the internal combustion engine; correcting the input for the exhaust gas recirculation rate as a function of a change in an operating behavior of the internal combustion engine due to the ignition timing adjustment. | 03-21-2013 |
20130092135 | METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE - In a method for operating an internal combustion engine, a measured NO | 04-18-2013 |
20130124069 | METHOD FOR DETERMINING A FILLING DIFFERENCE IN CYLINDERS OF AN INTERNAL COMBUSTION ENGINE, OPERATING METHOD, AND CALCULATION UNIT - In a method for determining a filling difference between at least two cylinders of an internal combustion engine, e.g., an Otto-cycle engine, a power output parameter contribution made available by the respective cylinder to a total power output parameter of the internal combustion engine is ascertained for each of the at least two cylinders for different fuel quantities, and an air inhomogeneity between the at least two cylinders is ascertained on the basis of the power output parameter contributions, ascertained for the different fuel quantities, of the at least two cylinders. | 05-16-2013 |
20130166186 | Method and Device For Operating A Cold Start Emission Control Of An Internal Combustion Engine - A method for operating a cold start emission control of an internal combustion engine, a combustion chamber pressure in at least one cylinder of the internal combustion engine being initially detected, at least one characteristic variable for a combustion process of the internal combustion engine being determined based on the detected combustion chamber pressure, a setpoint value being established for the characteristic variable, a deviation of the characteristic variable from the setpoint value being determined, and an error entry being generated as a function of the determined deviation. | 06-27-2013 |
20150107229 | METHOD AND DEVICE FOR REDUCING THE EMISSION OF NITROUS OXIDE - In a method for regeneration of nitrogen oxide storage catalytic converters in the exhaust gas tract of a gasoline engine assigned an exhaust aftertreatment system in the form of a Y system including two three-way catalytic converters, two downstream nitrogen oxide storage catalytic converters, one shared catalytic converter for selective catalytic reduction, and a rear nitrogen oxide storage catalytic converter, a first part of the exhaust gas in the first exhaust bank is set to rich and a second part of the exhaust gas in the second exhaust bank is set to lean in a first regeneration phase and subsequently, the second part of the exhaust gas in the second exhaust bank is set to rich and the first part of the exhaust gas in the first exhaust bank is set to lean in a second regeneration phase. | 04-23-2015 |