Andreas Stihl Ag Co. Kg

Johannes Alber

Klaus Geyer

Michael Raffenberg

Michael Grether

Niels Kunert

Michael Dietenberger

Martin Christoph Arenz

Hannes Frank

Dietmar Widmann

Jan-Eilert Kueper

Hans Hildenbrand

Marcus Bonifer

Johann-Sebastian Renz

Jan-Eilert KÜPER

An exhaust muffler has an exhaust inlet, an exhaust outlet, as well as a catalytic converter which, in the flow direction, is disposed between the exhaust inlet and the exhaust outlet. The catalytic converter has at least one throughflow body which includes at least one wire body. At least one first component region of the throughflow body is coated with a catalytically functioning coating. The throughflow body moreover has a second component region which in terms of volume has a smaller quantity of catalytically functioning coating than the first component region.

Exhaust muffler, two-stroke engine or four-stroke engine having an exhaust muffler, and catalytic converter for an exhaust muffler

A fuel feed unit has a base body with an intake channel section, into which a fuel opening opens. A partition wall section divides the intake channel section into a mixture channel and an air channel. The wall section has a recess in which the throttle flap at least partially lies in an end position. The wall section has, upstream of the recess, a continuous surface facing the mixture channel and which has lateral sections adjacent to the channel wall and a middle section running between the lateral sections. The lateral sections have, upstream of the throttle flap, a separation edge for the flow. In the end position, the side of the throttle flap facing the mixture channel defines a reference plane which divides the unit into a first region and a second region. The lateral sections extend, at least directly upstream of the recess, into the second region.

Fuel feed unit and two-stroke engine having a fuel feed unit

A method for operating the two stroke engine provides that the fuel valve is controlled after the starting process in at least a quasi-steady state such that, on the basis of uninterruptedly successive blocks of successive revolutions of the crankshaft, the fuel valve is opened and closed exactly once within each block. Each block includes from two to twenty revolutions of the crankshaft. The fuel valve is opened over a crankshaft angle (&#x3b1;) of more than 360&#xb0; within one block in at least one operating state. A control device is provided for controlling the fuel valve. A quasi-steady state of the two stroke engine is a state in which the throttle element is adjusted by less than 10% of the maximum adjustment of the throttle element over a crankshaft angle (&#x3b1;) of 360&#xb0;.

Method for operating a two stroke engine

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Stuttgart, Germany

Johannes Alber