Two-cycle engine
AssigneeAndreas Stihl AG & Co. KG
InventorsWerner Geyer, Lukas Zürcher
Life of this patent
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Abstract
A two-cycle engine having a piston reciprocalbly mounted in a cylinder in which a combustion chamber is formed. In prescribed positions of the piston, the combustion chamber communicates with a crankcase via at least one transfer channel. A portion of an intake channel for supplying fuel/air mixture and combustion air is formed in a carburetor, in which is pivotably mounted a butterfly valve for controlling the flow cross-section of the intake channel. A fuel opening opens into the intake channel portion, and downstream of the carburetor the intake channel is divided into a mixture channel and an air channel. A mechanism is disposed on the butterfly valve to increase the speed of flow in the carburetor in the vicinity of the fuel opening.
Claims20
A two-cycle engine, comprising:
- a cylinder, wherein a combustion chamber is formed in said cylinder;
- a piston reciprocably mounted in said cylinder, wherein in prescribed positions of said piston said combustion chamber is in communication with a crankcase via at least one transfer channel;
- an intake channel for the supply of fuel/air mixture and combustion air;
- a carburetor, wherein a portion of said intake channel is formed in said carburetor;
- a butterfly valve pivotably mounted in said carburetor for a control of a flow cross-section of said intake channel, wherein a fuel opening opens into said intake channel portion, and wherein downstream of said carburetor said intake channel is divided into a mixture channel and an air channel;
- and
- means disposed on said butterfly valve and adapted to increase a speed of flow in said carburetor in a vicinity of said fuel opening.
Dependencies are inferred from the claim text.