Carburetor with low flow rate fluid passage
AssigneeWalbro Corporation
InventorMichael P. Burns
Life of this patent
Estimating the term…
Abstract
A carburetor including a body having a main bore through which a fuel and air mixture is discharged from the carburetor for use by an engine a priming passage communicated with the main bore, a pump that moves fluid into the priming passage, and a flow restrictor received within at least a portion of the priming passage to reduce the minimum effective flow area of the priming passage. The flow restrictor has a body received at least partially within the priming passage so that fluid flows around the flow restrictor and between the structure defining the priming passage and the flow restrictor.
Claims19
A carburetor, comprising:
- a body having a main bore through which a fuel and air mixture is discharged from the carburetor for use by an engine and a priming passage communicated with the main bore;
- a pump that moves fluid into the priming passage;
- and
- a flow restrictor received within at least a portion of the priming passage to reduce the minimum effective flow area of the priming passage, the flow restrictor comprising a body received at least partially within the priming passage so that fluid flows around the flow restrictor and between the structure defining the priming passage and the flow restrictor.
A carburetor, comprising:
- a body having a main bore through which a fuel and air mixture is discharged from the carburetor for use by an engine and a priming passage communicated with the main bore;
- a pump that moves fluid into the priming passage;
- and
- a flow restrictor received within at least a portion of the priming passage to reduce the minimum effective flow area of the priming passage, the flow restrictor comprising a wire received at least partially within the priming passage so that fluid flows around the flow restrictor and between the structure defining the priming passage and the flow restrictor.
A carburetor, comprising:
- a body having a main bore through which a fuel and air mixture is discharged from the carburetor for use by an engine and a priming passage communicated with the main bore;
- a pump that moves fluid into the priming passage;
- a flow restrictor received within at least a portion of the priming passage to reduce the minimum effective flow area of the priming passage, the flow restrictor comprising a body received at least partially within the priming passage so that fluid flows around the flow restrictor and between the structure defining the priming passage and the flow restrictor;
- and
- the priming passage is at least 0.4 mm in diameter and the total flow area between the flow restrictor and the priming passage is less than 0.12 mm2.
A carburetor, comprising:
- a body having a main bore through which air flows and into which fuel is admitted to provide a fuel and air mixture to an engine and a passage through which fluid flows;
- and
- a flow restrictor provided through at least a portion of the passage to reduce the minimum effective flow area of the passage, the flow restrictor comprising a body received at least partially within the passage so that fluid flows around the flow restrictor and between the portion of the body defining the passage and the flow restrictor, the priming passage is at least 0.4 mm in diameter and the total flow area between the flow restrictor and the priming passage is less than 0.12 mm2.
Dependencies are inferred from the claim text.