CARBURETOR WITH SINGLE DIAPHRAGM FOR SUPPLYING AND METERING FUEL

摘要

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.

主权项

1. 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.