Andreas Stihl Ag Co. Kg

Birger Loew

Jonas Lank

Werner Gräter

Werner Grāter

Tobias Baur

A piston for a two stroke engine which operates with advanced scavenging has a piston base and a piston skirt. The center axis of the piston skirt forms a longitudinal center axis of the piston. The piston has two piston pin eyes, in which piston pin receptacles are configured. The center axis of the piston pin receptacles forms a transverse axis of the piston. The piston has at least one piston pocket. At least one piston pin eye is connected via at least one connecting rib to the piston skirt. Here, the connecting rib runs on that side of the piston pocket which faces away from the piston base.

Piston for a two-stroke engine operating with advanced scavenging and a two-stroke engine

A piston for a two-stroke engine operating with advanced scavenging has a piston base and a piston skirt. The piston has a piston pocket which has a smallest distance (e) from a top side of the piston base. The piston has a section plane perpendicularly to the longitudinal center axis of the piston, the distance of which section plane from the top side of the piston base is greater than the smallest distance (e). A middle plane of the piston intersects the piston skirt at a location. In the circumferential direction between the pocket and this location, a thickened area is arranged in the section plane, the greatest wall thickness of which area is at least 1.1 times the wall thickness at the location. The piston has an edge at a recess at which the piston skirt has a reduced height. A chamfer is arranged on the radially outer side of the piston.

Piston for a two-stroke engine working with advanced scavenging and a two-stroke engine

A carburetor assembly () has an intake channel section () and an air channel section (). In the intake channel section (), a throttle element and a choke element are arranged. An air control element is arranged in the air channel section (). A first coupling unit () is provided which defines the position of the throttle element in at least one start position of the carburetor assembly (). A second coupling unit () couples the position of the air control element in at least one operating state to the position of the throttle element. To ensure a reliable start, the choke element is held in at least one start position by the first coupling unit () and the second coupling unit ().

Carburetor assembly

A switch arrangement includes a switch component () and a bearing component (). The switch component () is pivotally journalled with a pivot bearing () on the bearing component (). The switch arrangement includes a switch () which has a contact spring (). In an unactuated, closed position (), the contact spring () lies against a contact () of the switch (). A simple configuration of the switch arrangement and a self cleaning effect can be achieved when the pivot bearing () has a torsion section () which permits an overpushing of the switch () beyond the unactuated, closed position () into an actuated, closed position (). The contact spring () then slides on the contact () between the unactuated closed position () and the actuated closed position () and cleans the contact thereby.

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Wernau, Germany

Birger Loew