Abstract: A method for a combustion engine has a working cycle of three revolutions of the crankshaft. The method includes: feeding a fuel mixture into a combustion chamber of a cylinder while moving a piston from a second top dead-center to a first bottom dead-center; compressing an air-fuel mixture in the combustion chamber while moving the piston from the first bottom dead-center to a first top dead-center; burning the air-fuel mixture while moving the piston from the first top dead-center to a second bottom dead-center; compressing a gas mixture in the combustion chamber while moving the piston from the second bottom dead-center to the first top dead-center; burning the gas mixture while moving the piston from the first top dead-center to the first bottom dead-center; and expelling the gas mixture from the combustion chamber while moving the piston from the first bottom dead-center to the second top dead-center.

Abstract: A method for a combustion engine has a working cycle of three revolutions of the crankshaft. The method includes: feeding a fuel mixture into a combustion chamber of a cylinder while moving a piston from a second top dead-center to a first bottom dead-center; compressing an air-fuel mixture in the combustion chamber while moving the piston from the first bottom dead-center to a first top dead-center; burning the air-fuel mixture while moving the piston from the first top dead-center to a second bottom dead-center; compressing a gas mixture in the combustion chamber while moving the piston from the second bottom dead-center to the first top dead-center; burning the gas mixture while moving the piston from the first top dead-center to the first bottom dead-center; and expelling the gas mixture from the combustion chamber while moving the piston from the first bottom dead-center to the second top dead-center.

Abstract: The invention relates to a device and a method for purifying exhaust gases for an internal combustion engine, with a multi-flow exhaust gas system having, at least in individual regions, several partial exhaust gas lines, and in which a NOx storage catalytic converter device and a SCR catalytic converter device are located.

Abstract: The invention relates to a device for purification of exhaust gases for the exhaust gas line of an internal combustion engine, with an exhaust gas channel which is made multi-flow in a specified region and has several component exhaust gas lines, and with a metering device by means of which a specified amount of a reducing agent can be metered into the exhaust gas channel in the region upstream from the catalytic converter arrangement at specified times. According to the invention, a metering channel which branches off from the single metering device is assigned to each of the component exhaust gas lines, and a specified proportion of the amount of metered reducing agent can be supplied to each component exhaust gas line via the metering channels.

Abstract: A method for producing ammonia for treating exhaust gas in internal combustion engines in a motor vehicle proposes that the internal combustion engine is operated with an air/fuel ratio ?<1.0, and water is added to the air/fuel mixture supplied to the internal combustion engine in order to produce the ammonia required for treating the exhaust gas on board the vehicle. And in a device for implementing the method with a means for determining the air/fuel ratio ? of the air/fuel mixture supplied to the internal combustion engine, it is proposed that an addition means for adding water to the air/fuel mixture be provided in order to produce the ammonia required for exhaust gas treatment on board the motor vehicle, the addition means being controllable depending on the determined air/fuel ratio ?.

Abstract: The invention relates to a device and a method for purifying exhaust gases for an internal combustion engine, with a multi-flow exhaust gas system having, at least in individual regions, several partial exhaust gas lines, and in which a NOx storage catalytic converter device and a SCR catalytic converter device are located.

Abstract: The invention relates to a device for purification of exhaust gases for the exhaust gas line of an internal combustion engine, with an exhaust gas channel which is made multi-flow in a specified region and has several component exhaust gas lines, and with a metering device by means of which a specified amount of a reducing agent can be metered into the exhaust gas channel in the region upstream from the catalytic converter arrangement at specified times. According to the invention, a metering channel which branches off from the single metering device is assigned to each of the component exhaust gas lines, and a specified proportion of the amount of metered reducing agent can be supplied to each component exhaust gas line via the metering channels.

Abstract: A method for producing ammonia for treating exhaust gas in internal combustion engines in a motor vehicle proposes that the internal combustion engine is operated with an air/fuel ratio ?<1.0, and water is added to the air/fuel mixture supplied to the internal combustion engine in order to produce the ammonia required for treating the exhaust gas on board the vehicle. And in a device for implementing the method with a means for determining the air/fuel ratio ? of the air/fuel mixture supplied to the internal combustion engine, it is proposed that an addition means for adding water to the air/fuel mixture be provided in order to produce the ammonia required for exhaust gas treatment on board the motor vehicle, the addition means being controllable depending on the determined air/fuel ratio ?.

Abstract: The invention relates to a method and a device for the addition of a reducing agent in an exhaust gas line of an internal combustion engine of a motor vehicle, with at least one NOx storage catalyst that is arranged in the exhaust gas line of the internal combustion engine, and with a metering device, by means of which a preset amount of a reducing agent is introduced into the exhaust gas line at preset times.

Abstract: A method and device for purifying an exhaust gas flow of a lean-burning internal combustion engine, with a particle filter which stores particles both in rich and lean operation of the internal combustion engine and which has at least one catalytically active component on which in lean operation of the internal combustion engine defined exhaust gas components, in particular carbon monoxides and/or hydrocarbons are oxidized, the particle filter furthermore having at least one catalytically active component on which in rich operation of the internal combustion engine defined nitrogen oxides are converted into ammonia using hydrogen present in the exhaust gas flow, the ammonia being temporarily stored in at least one SCR catalytic converter which is connected downstream to the particle filter in the exhaust gas flow direction, and the SCR catalytic converter having at least one catalytically active component on which in lean operation of the internal combustion engine defined nitrogen oxides are reduced using th