Patent ID: 8733318

Claim:
An internal combustion engine, comprising: a structure ( 20 , 17 ) having an intake channel ( 21 ); a partition ( 18 ) disposed in said intake channel ( 21 ) and dividing said intake channel into an air duct ( 15 ) and a mixture duct ( 16 ), wherein said partition ( 18 ) is provided with a connecting opening ( 31 ), between said air duct ( 15 ) and said mixture duct ( 16 ), that at least in a full throttle condition of said internal combustion engine is adapted to be substantially closed; a carburetor ( 20 ), wherein a section of said intake channel ( 21 ) is formed in said carburetor ( 20 ), wherein the carburetor is a diaphragm carburetor and comprises a regulating chamber; a first fuel opening configured as a main fuel opening ( 24 ) disposed in said structure ( 20 , 17 ) and opening out into said mixture duct ( 16 ); and at least one second fuel opening, wherein said at least one second fuel opening is an idle fuel opening, wherein the idle fuel opening is connected to the regulating chamber of the carburetor and opens into the mixture duct ( 16 ), wherein said at least one idle fuel opening is spaced from a wall ( 32 ) of said intake channel ( 21 ) by a first distance (a), and wherein said at least one idle fuel opening opens out into said mixture duct ( 16 ) at a second distance (c) relative to said partition ( 18 ).