Andreas Stihl Ag Co. Kg

Andreas Stihl Ag & Co.

Markus Maurer

Werner Geyer

Niels Kunert

Michael Joos

Oliver Krause

Alexander Steinbach

An internal combustion engine has a cylinder () wherein a combustion chamber () is formed which is delimited by a piston () journalled to move back and forth. At least one transfer channel () is provided which connects the crankcase () of the engine to the combustion chamber () in at least one position of the piston (). The engine has a supply channel () which opens with a supply channel inlet () at the cylinder bore (). The supply channel () is connected to the transfer channel () via at least one piston pocket () in at least one position of the piston (). In order to achieve low exhaust-gas values of the engine, the piston pocket () has a distance (a) to a lower edge () of the transfer window () which is less than the distance (b) to a lower edge () of the inlet () of the supply channel at bottom dead center of the piston (). A method for operating an engine provides that the piston pocket () is first connected to the transfer window () and then to the supply channel inlet () during the upward stroke of the piston ().

Growing community of inventors

Forst, Germany

Markus Maurer