Primer system and method for priming an internal combustion engine
A carburetion system is described for an internal combustion engine comprising: a diaphragm carburetor comprising a carburetor body, an air-fuel passage in the carburetor body adapted to communicate with an engine combustion chamber, a fuel metering chamber in the carburetor body in communication with the air-fuel passage and a fuel pump including a fuel chamber in the carburetor body, the metering chamber communicating with the fuel pump chamber and the air-fuel passage; a manually actuatable primer pump means comprising a variable volume chamber; a fuel pump outlet check valve having an inlet side connected to the fuel pump and an outlet side connected to the primer pump chamber; a priming passageway in the carburetor body connected to the air-fuel passage; a primer check valve having an inlet connected to the primer pump means chamber and an outlet connected to the priming passageway; and an inlet passageway in the carburetor body communicating between the outlet side of the fuel pump outlet check valve and the metering chamber.
- Assignee:
- Tecumseh Products Co., Tecumseh, MI
- Patent Number(s):
- US 4684484
- OSTI ID:
- 6202561
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
330100* -- Internal Combustion Engines
CARBURETORS
COMBUSTION CHAMBERS
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
FLOW REGULATORS
FUEL GAGES
FUEL SYSTEMS
FUEL-AIR RATIO
HEAT ENGINES
INTAKE STRUCTURES
INTERNAL COMBUSTION ENGINES
MEASURING INSTRUMENTS
MECHANICAL STRUCTURES
METERING
PUMPS
VALVES