Carburetor with single diaphragm for supplying and metering fuel
AssigneeZama Japan Kabushiki Kaisha
InventorsDavid R. Shebuski, Toshiyuki Kuyo, Takumi Nonaka, Jay A. Perry
Life of this patent
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Abstract
A carburetor includes a body with an air intake path, a fuel pump and a fuel pressure regulator. The fuel pump and fuel pressure regulator are positioned on the same side of the body. A fuel pump and metering chamber diaphragm is sandwiched between the body of the carburetor and a pump body and cover. The diaphragm separates a pump chamber from a pulse chamber of the fuel pump and separates a fuel chamber from an air chamber in the fuel pressure regulator. Inlet and outlet flapper valves are part of the diaphragm or a separate flapper valve member positioned between the body and the diaphragm.
Claims16
A carburetor comprising
- a body with an air intake path extending there through,
- a pump cover coupled to a side of the body, and
- a pump and metering diaphragm interposed between the body of the carburetor and the pump cover, wherein the pump and metering diaphragm divides a fuel pump into a pulse chamber formed in the body of the carburetor and a pump chamber formed in the pump cover, and divides a fuel pressure regulator into a constant pressure fuel chamber formed in the body of the carburetor and an air chamber formed in the pump cover, wherein the pulse chamber and constant pressure fuel chamber are formed in the body of the carburetor on the same side of the carburetor, and
- an inlet valve and an outlet valve positioned within inlet and outlet fuel passages of the fuel pump, the inlet and outlet valves interposing the body and the pump cover.
A carburetor comprising
- a body,
- an air intake path in the body,
- a fuel pump,
- inlet and outlet fuel passages in fluid communication with the fuel pump,
- inlet and outlet flapper valves positioned within the inlet and outlet fuel passages,
- a metering chamber,
- a pump cover coupled to a side of the body, and
- a pump and metering diaphragm interposed between the body of the carburetor and the pump cover, wherein the pump and metering diaphragm divides the fuel pump into a pulse chamber and a pump chamber, and divides metering chamber into a constant pressure fuel chamber and an air chamber formed,
- wherein one of a pulse chamber and a pump chamber of the fuel pump, one of a constant pressure fuel chamber and an air chamber of the metering chamber, and openings to the inlet and outlet fuel passages open along a common plane on the same side of the body as the pump cover.
A carburetor comprising
- a body,
- an air intake path in the body,
- a fuel pump,
- inlet and outlet fuel passages in fluid communication with the fuel pump,
- a metering chamber,
- a pump cover coupled to a side of the body,
- a pump and metering diaphragm interposed between the body of the carburetor and the pump cover, wherein the pump and metering diaphragm divides the fuel pump into a pulse chamber and a pump chamber, and divides metering chamber into a constant pressure fuel chamber and an air chamber formed, and
- a gasket interposing the pump and metering diaphragm and the pump cover,
- wherein one of a pulse chamber and a pump chamber of the fuel pump, one of a constant pressure fuel chamber and an air chamber of the metering chamber, and openings to the inlet and outlet fuel passages open along a common plane on the same side of the body as the pump cover.
Dependencies are inferred from the claim text.