Impulse pump
AssigneeWalbro Corporation
InventorsTakashi Abei, Naoya Kumagai
Life of this patent
Estimating the term…
Abstract
In at least some implementations, a carburetor includes a body, a fuel pump diaphragm and a pressure pulse passage. The fuel pump diaphragm is carried by the body and defines in part a fuel chamber on one side of the fuel pump diaphragm and a pressure pulse chamber on the other side of the fuel pump diaphragm. The pressure pulse passage communicates the pressure pulse chamber with a pressure pulse source to provide pressure pulses in the pressure pulse chamber to actuate the fuel pump diaphragm. The pressure pulse passage includes an inlet communicating with a passage in which pressure pulses are present and the inlet is spaced from a surface defining the passage in which pressure pulses are present.
Claims19
A carburetor, comprising:
- a body;
- a fuel pump diaphragm carried by the body and defining in part a fuel chamber on one side of the fuel pump diaphragm and a pressure pulse chamber on the other side of the fuel pump diaphragm;
- and
- a pressure pulse passage communicating the pressure pulse chamber with a pressure pulse source to provide pressure pulses in the pressure pulse chamber to actuate the fuel pump diaphragm, the pressure pulse passage including an inlet communicating with a passage having a centerline and in which pressure pulses are present and the inlet being spaced from a surface defining the passage in which pressure pulses are present and the inlet being closer to the centerline than is an adjacent portion of the surface defining the passage in which the pressure pulses are present.
A carburetor, comprising:
- a body;
- a diaphragm carried by the body and defining in part a fuel chamber on one side of the diaphragm and a pressure pulse chamber on the other side of the diaphragm;
- and
- a pressure pulse passage communicating the pressure pulse chamber with a pressure pulse source to provide pressure pulses in the pressure pulse chamber to actuate the diaphragm, the pressure pulse passage including an inlet communicating with a passage having a centerline and in which pressure pulses are present and the inlet being spaced from a surface defining the passage in which pressure pulses are present and the inlet being closer to the centerline than is a portion of the surface defining the passage in which the pressure pulses are present, where said portion of the surface is adjacent to the inlet.
Dependencies are inferred from the claim text.