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US 8,444,119 B2Granted
Carburetor
AssigneeAndreas Stihl AG & Co. KG
InventorsClaus Naegele, Werner Geyer
Life of this patent
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Abstract
A carburetor has a housing and an intake passage section disposed in the housing. A throttle element is arranged in the intake passage section and a choke element is arranged in the intake passage section upstream of the throttle element. At least one fuel opening opens downstream of the choke element into the intake passage section. A fuel valve controls a fuel quantity supplied to the at least one fuel opening. At least one auxiliary fuel port opens upstream of the choke element into the intake passage section.
Claims13
A carburetor comprising:
- a housing;
- an intake passage section disposed in said housing;
- a throttle element arranged in said intake passage section;
- a choke element arranged in said intake passage section upstream of said throttle element;
- at least one fuel opening that opens downstream of said choke element into said intake passage section;
- a fuel valve controlling a fuel quantity supplied to said at least one fuel opening;
- at least one auxiliary fuel port that opens upstream of said choke element into said intake passage section;
- an auxiliary fuel path connected to said at least one auxiliary fuel port, wherein said at least one auxiliary fuel port is supplied with fuel, independent of a fuel supply provided by said fuel valve, through said auxiliary fuel path;
- a check valve disposed in said auxiliary fuel path, wherein said check valve opens in a flow direction toward said at least one auxiliary fuel port;
- wherein said auxiliary fuel path comprises a fixed throttle bore designed such that, when said throttle element is completely open and said choke element is completely open, approximately 10% to approximately 40% of a fuel quantity supplied in total to said intake passage section is supplied through said at least one auxiliary fuel port.
7 more elements
Dependencies are inferred from the claim text.