Electric fuel pump for vehicle

A fuel pump, electric technology, applied in liquid fuel feeders, liquid fuel engines, pumps, etc., can solve the problems of increased labor and expensive pumps.
CN1414246AInactive Publication Date: 2003-04-30KYOSAN DENKI KABUSHIKI KAISHA +1
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
KYOSAN DENKI KABUSHIKI KAISHA
Publication Date
2003-04-30
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

At a boundary area between a high-pressure portion in which a discharge port of a fuel pump is disposed and a low-pressure portion in which an intake port is disposed, a pressure relief groove extending along the boundary area is formed so as to be communicated with the outside of the pump by means of pressure relief hole. Alternatively, a slit is formed communicated with the outside. Accordingly, a fuel at a high-pressure area portion can be drained with reliability. Further, by communicating the above pressure relief groove with a positioning pin insertion port, a single hole can serve both as a positioning pin insertion hole and a pressure relief hole.
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Description

technical field

[0001] The present invention relates to a vehicle motor-driven type fuel pump housed in a vehicle fuel tank, and more particularly, to an electric type fuel pump for a vehicle for reliably preventing fuel compressed by one compression stroke of the pump from being used as Vapor enters the port side and further allows a single hole to serve both as a locating pin to perform positioning when the housing and cover are assembled, and as a relief hole to relieve pressure in the pump chamber. Background technique

[0002] Recently, an in-tank type motor-driven fuel pump installed in a fuel tank is used as a fuel pump that supplies fuel to a motor of a vehicle. Widely used among them is a fuel pump suspended from a flange member fastened to a hole in the upper wall of the fuel tank. Also used is an integral type fuel pump in which a filter or the like is incorporated.

[0003] In these fuel pumps, as shown in the sectional view of the pump part in FIG. A bottom s...

Claims

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