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US 7,546,825 B2Granted
Multi-chambered fuel enrichment device
AssigneeHusqvarna Outdoor Products Inc.
InventorsWilliam B. Keeton, Rodney W. Tynes
Life of this patent
Estimating the term…
Abstract
A fuel enrichment device includes a body forming a first fuel chamber and a second fuel chamber. The second fuel chamber is adapted to contain a predetermined amount of enriching fuel to be provided to an engine. A normally open valve connects the first fuel chamber to the second fuel chamber. A normally closed valve for controls the provision of enriching fuel to the engine. The normally closed valve is open whenever the normally open valve is closed.
Claims22
A fuel enrichment device, comprising:
- a body forming a first fuel chamber and a second fuel chamber, wherein the second fuel chamber is adapted to contain a predetermined amount of enriching fuel to be provided to an engine;
- a normally open valve connecting the first fuel chamber to the second fuel chamber;
- and
- a normally closed valve for controlling the provision of enriching fuel to the engine, wherein the normally closed valve is open whenever the normally open valve is closed.
1 more element
A fuel enrichment device comprising:
- a body forming a first fuel chamber and a second fuel chamber, wherein the second fuel chamber is adapted to contain a predetermined amount of enriching fuel to be provided to an engine;
- a normally open valve connecting the first fuel chamber to the second fuel chamber;
- a normally closed valve for controlling the provision of enriching fuel to the engine, wherein the normally closed valve is open whenever the normally open valve is closed;
- and
- a solenoid for controlling an operation of at least one of the normally open valve and the normally closed valve.
2 more elements
A fuel enrichment device comprising:
- a body forming a first fuel chamber and a second fuel chamber, wherein the second fuel chamber is adapted to contain a predetermined amount of enriching fuel to be provided to an engine;
- a normally open valve connecting the first fuel chamber to the second fuel chamber;
- a normally closed valve for controlling the provision of enriching fuel to the engine, wherein the normally closed valve is open whenever the normally open valve is closed;
- and
- a purge device, wherein an operation of the purge device while the engine is not running fills the first fuel chamber with fuel.
2 more elements
An engine priming system, comprising:
- an engine having an intake for receiving a fuel and air mixture;
- a carburetor having an air passage for mixing fuel and air, wherein the air passage is in fluid communication with the intake;
- and
- an automatic fuel enrichment device comprising a body forming a first fuel chamber in fluid communication with the carburetor and a second fuel chamber in fluid communication with both of the intake and the first fuel chamber, wherein the automatic fuel enrichment device automatically provides a predetermined amount of enriching fuel directly to the intake.
1 more element
An engine priming system comprising:
- an engine having an intake for receiving a fuel and air mixture;
- a carburetor having an air passage for mixing fuel and air, wherein the air passage is in fluid communication with the intake;
- an automatic fuel enrichment device comprising a body forming a first fuel chamber in fluid communication with the carburetor and a second fuel chamber in fluid communication with both of the intake and the first fuel chamber, wherein the automatic fuel enrichment device automatically provides a predetermined amount of enriching fuel directly to the intake;
- a normally open valve connecting the first fuel chamber to the second fuel chamber;
- and
- a normally closed valve connecting the second fuel chamber to the intake for controlling the provision of the enriching fuel to the intake, wherein operation of the normally open valve is interlocked with operation of the normally closed valve so that the normally closed valve is open whenever the normally open valve is closed.
3 more elements
An engine priming system comprising:
- an engine having an intake for receiving a fuel and air mixture;
- a carburetor having an air passage for mixing fuel and air, wherein the air passage is in fluid communication with the intake;
- an automatic fuel enrichment device comprising a body forming a first fuel chamber in fluid communication with the carburetor and a second fuel chamber in fluid communication with both of the intake and the first fuel chamber, wherein the automatic fuel enrichment device automatically provides a predetermined amount of enriching fuel directly to the intake;
- and
- a purge device, wherein an operation of the purge device while the engine is not running fills the first fuel chamber with fuel and purges fuel from the carburetor.
2 more elements
A fuel enrichment device, comprising:
- a body forming a first fuel chamber and a second fuel chamber, wherein the second fuel chamber is adapted to contain a predetermined amount of enriching fuel to be provided to an engine;
- a valve connecting the first fuel chamber to the second fuel chamber that is closed if the engine is running and open if the engine is not running;
- and
- an additional valve for controlling the provision of enriching fuel to the engine, wherein the additional valve is open if the engine is running and closed if the engine is not running.
1 more element
Dependencies are inferred from the claim text.