Bayerische Motoren Werke Aktiengesellschaft

Magna Powertrain Gmbh & Co. Kg

Michael Maurer

Hannes Hofstetter

Friedrich Atschreiter

Gert Barnstedt

Lukas Stoeger

A method for operating an exhaust system includes supplying exhaust gas to a first SCR catalytic converter. The method relates to a cold start, wherein a prior operating state of the first SCR catalytic converter existing prior to the cold start ascertained by a computer is considered. Aside from a water quantity that was adsorbed on the first SCR catalytic converter prior to the cold start, a reducing agent quantity that was adsorbed on the first SCR catalytic converter prior to the cold start, which quantity is assigned to the prior operating state is also taken into consideration to determine an actual reducing agent quantity on the first SCR catalytic converter. A compensation reducing agent quantity is metered as required and characterizes a differential value between a setpoint quantity and the actual reducing agent quantity, and being admixed to the exhaust gas upstream of the first SCR catalytic converter.

Method for operating an exhaust system having an SCR catalytic converter for an internal combustion engine, internal combustion engine having an exhaust system, and a motor vehicle having an internal combustion engine

A device for sealing a valve for controlling a coolant of an internal combustion engine of a motor vehicle is described, which valve is mounted in a cooling system together with a valve housing, wherein the valve housing contains, at the inlet and/or the outlet side, a sealing ring which has an annular wall and a spaced annular lip extending away from the annular wall from a contact point.

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Ottensheim, Austria

Michael Maurer