Andreas Stihl Ag Co. Kg

Mark Reichler

Klaus-Martin Uhl

Werner Geyer

Claus Naegele

Ulrich Kapinsky

Eberhard Bohnaker

Helmut Schlessmann

Martin Rieber

Jörg Amann

Markus Weinig

Christian Eberle

Robert Köhli

Evelyn Kullik

Ricardo Hojczyk

An internal combustion engine has an intake channel which opens via a first valve into a crankcase of the engine. The first valve opens at a first frequency (f). The engine has a second valve, which controls the quantity of fuel supplied into the intake channel. The quantity of fuel is controlled by controlling the time interval during which the second valve is open during each engine cycle (x). A control device is provided to control the quantity of fuel supplied. In a first operating state, the second valve is opened at a second frequency (f, f, f) which is coordinated with the first frequency (f). In a second operating state, the second valve is opened independently of the first frequency (f).

Method for operating an internal combustion engine

A hand-held power tool has a housing with a cylinder chamber. An internal combustion engine is arranged in the housing and the internal combustion engine has a cylinder arranged in the cylinder chamber. A device is provided that detects temperature information in the cylinder chamber when the internal combustion engine is in an inoperative state. An indicator device that indicates the temperature information is provided.

Hand-held power tool

An engine has a cylinder wherein a reciprocating piston is mounted. The piston drives, via a connecting rod (), a crankshaft () pivotably mounted in a crankcase. The connecting rod is connected to the piston via a piston pin. An inlet window for combustion air is provided and controlled by the piston. The piston separates a combustion chamber from the crankcase interior space and has a piston base the underside of which is oriented toward the crankcase. To achieve good cooling of the piston and of the piston pin bearing, a first flow-guide element is provided within the crankcase interior space adjacent to the inlet window. The first flow-guide element redirects the combustion air flowing in through the inlet window in the direction of the underside of the piston base.

Two-stroke engine

An internal combustion engine has a cylinder () and a crankcase (). A combustion chamber () is formed in the cylinder () and is delimited by a piston (). The piston () rotationally drives a crankshaft () in a rotational direction () via a connecting rod (). The crankshaft () is arranged in a crankcase interior space (). A mixture inlet () is provided in the crankcase interior space (). In the crankcase interior space (), at least one flow conducting element () is provided which is spatially fixed and this flow conducting element projects into the crankcase interior space () and lies opposite to the rotational direction () of the crankshaft ().

Internal combustion engine

Growing community of inventors

Remshalden, Germany

Mark Reichler