Andreas Stihl Ag Co. Kg

Jan Borchardt

Reinhard Gerhardy

Klaus Geyer

Arno Kinnen

Kai-Ulrich Machens

Andreas Bähner

Andreas Lingen

Predag Ostojic

Rainer Ziegler

Robert Wirtz

Nils Kunert

An internal combustion engine includes a cylinder () wherein a combustion chamber () is formed. The engine also includes devices for metering fuel and combustion air as well as an ignition device for igniting the mixture in the combustion chamber (). A method for operating the internal combustion engine provides that fuel and combustion air are supplied to the engine and the mixture is ignited in the combustion chamber (). The combustion chamber () is delimited by a piston () which drives a crankshaft () rotatably journalled in a crankcase (). A control is provided which controls the supply of fuel and the ignition of the mixture in the combustion chamber (). The internal combustion engine is so controlled in at least one operating state that the number of combustions is less than the number of engine cycles in the same time span. To avoid the formation of self ignitions, the operating state is a high rpm range wherein the rpm lies above the rated rpm and below the rpm in a regulating range.

Method for operating an internal combustion engine

A mixture-lubricated internal combustion engine has a cylinder () in which a combustion chamber () is formed. The combustion chamber () is delimited by a piston () mounted to move back and forth. The piston () drives a crankshaft () rotatably journalled in a crankcase (). The engine has an inlet channel () which supplies fuel and combustion air into the combustion chamber () as well as an exhaust outlet () from which exhaust gases flow from the combustion chamber. The intake inlet () and the exhaust outlet () are valve controlled. A flow connection is present between the crankcase () and the inlet channel (). A good idle stability and a good idle acoustic of the engine are achieved in that at least one control valve () is mounted in the flow connection.

Mixture-lubricated internal combustion engine

A carburetor for an internal combustion engine includes an intake channel section () as well as a throttle element journalled in the intake channel section (). The throttle element is adjustable between a full-load position () and an idle position (). A pump () is provided for additional fuel metering and this pump includes a pumping chamber () and a pump piston () guided in the pumping chamber (). The position of the pump piston () is coupled to the position of the throttle element. To ensure an optimal supply of the internal combustion engine with fuel in each operating state, the pump piston () is so coupled to the throttle element that fuel is pumped from the pumping chamber () into the intake channel section () when there is a displacement of the throttle element from the full throttle position () into the idle position ().

Carburetor

Growing community of inventors

Waiblingen, Germany

Jan Borchardt