Andreas Stihl Ag Co. Kg

Andreas Stihl Ag & Co.

Andreas Stihl

Martin Benholz

Georg Maier

Philipp Neumann

G&uuml;nter Wolf

Andreas B&auml;hner

The invention relates to a carburetor arrangement for an internal combustion engine ( ) which drives a work apparatus. The engine ( ) has an intake channel ( ) leading through a carburetor ( ). The intake channel ( ) includes an intake opening ( ) on the side of the carburetor ( ) facing away from the engine ( ). A baffle wall ( ) is provided and covers the intake opening ( ) at least partially. The baffle wall ( ) is mounted transversely to the longitudinal axis ( ) of the intake channel ( ) at a spacing to the intake opening ( ). The baffle wall ( ) and the intake opening ( ) define a baffle enclosure ( ) disposed therebetween. At least a first component part ( ) of the baffle wall ( ) is inclined with respect to the longitudinal axis ( ) of the intake channel ( ) in such a manner that fuel droplets ( ), which exit from the intake channel ( ) and which impinge on the first component part ( ) of the baffle wall ( ), form a fuel film ( ).

Carburetor arrangement

The invention is directed to a membrane carburetor for changing the air/fuel ratio. The membrane carburetor achieves the same result as previous carburetors but at a greater insensitivity to wear and disturbances as well as an improved controllability in a constructively simpler and more compact manner. The carburetor includes a coil arranged about a valve needle so that the coil and the valve needle conjointly define a solenoid actuator. The valve needle is the armature of the solenoid actuator. When a limit rpm is reached, the coil is activated by a current and the armature is raised and thereby a greater flow of fuel is made possible. The enrichment of the air/fuel mixture achieved in this manner limits the engine rpm. The membrane carburetor wherein the air/fuel ratio can be changed is for an internal combustion engine of a portable handheld apparatus such as a motor-driven chain saw, hedge clippers and the like.

Membrane carburetor

Growing community of inventors

Oppenweiler, Germany

Martin Benholz