Engine having oil fill tube with integrated fuel pump
AssigneeTecumseh Products Company
InventorsDennis N. Stenz, Allen A. Schmitz, Kevin D. Steffes, Scott J. Schneider
Life of this patent
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Abstract
An internal combustion engine having an engine housing containing an oil sump in communication with an oil fill conduit, and a fuel pump including a pump assembly having at least a portion thereof formed integrally with the oil fill conduit and in fluid communication therewith. The fuel pump is actuated by pressure pulses created within the engine crankcase when the engine is running, which are communicated to the fuel pump through the oil fill conduit.
Claims21
An internal combustion engine, comprising:
- an engine housing containing an oil sump therein;
- an oil fill conduit in fluid communication with said oil sump;
- and
- a fuel pump including a pump assembly, at least a portion of said pump assembly integrally formed with said oil fill conduit and in fluid communication therewith.
An internal combustion engine, comprising:
- a crankcase containing an oil sump therein;
- an oil fill tube attached to said crankcase in fluid communication with said oil sump;
- a fuel pump including a pump assembly, at least a portion of said pump assembly integrally formed with said oil fill tube and in fluid communication therewith;
- and
- a diaphragm disposed within said pump assembly, said diaphragm actuated by pressure pulses generated within said crankcase during running of said engine, said pressure pulses communicated to said pump assembly from said crankcase through said oil fill tube.
An internal combustion engine, comprising:
- a crankcase containing an oil sump therein;
- at least one cylinder connected to said crankcase;
- a crankshaft rotatably carried within said crankcase;
- a least one connecting rod and piston assembly coupled to said crankshaft,
- said at least one piston reciprocable within a respective said cylinder to generate pressure pulses within said crankcase;
- an oil fill tube attached to said crankcase in communication with said oil sump;
- and
- a fuel supply system for said engine, comprising:
- a fuel tank;
- a carburetor;
- a fuel line connecting said fuel tank with said carburetor;
- and
- a fuel pump in disposed within said fuel line, said fuel pump including a pump assembly having a diaphragm therein, at least a portion of said pump assembly integrally formed with said oil fill tube and in fluid communication therewith, wherein said diaphragm is actuated by said pressure pulses to pump fuel from said fuel tank to said carburetor.
A fuel pump and oil fill tube assembly, comprising:
- an oil fill tube;
- and
- a fuel pump, at least a portion of said fuel pump integrally formed with said oil fill tube and in fluid communication therewith.
Dependencies are inferred from the claim text.