Electric fuel pump and method for manufacturing the same

A fuel pump and fuel channel technology, which is applied to fuel injection devices, charging systems, engine components, etc., can solve problems such as large size of fuel pumps

Active Publication Date: 2008-03-12
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the size of the fuel pump becomes larger when the two terminals are simply arranged at a greater distance from each other

Method used

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  • Electric fuel pump and method for manufacturing the same
  • Electric fuel pump and method for manufacturing the same
  • Electric fuel pump and method for manufacturing the same

Examples

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no. 1 example

[0030] A fuel pump according to one embodiment is described below with reference to FIGS. 1 to 10C.

[0031] The fuel pump shown in FIG. 1 is an in-tank pump installed in, for example, a fuel tank of an automobile. Accordingly, the fuel pump is completely immersed in the fuel. The fuel pump supplies fuel from the fuel tank to the engine. The fuel pumped by the fuel pump is a fuel containing highly conductive components such as high-density alcohol petroleum fuel mixture, bio-alcohol, and 100% alcohol fuel.

[0032] As follows, the structure of the fuel pump is described with reference to FIG. 1 . The fuel pump comprises a motor part 10 and a pump part 20 which is driven by the motor part 10 to increase the pressure of the pumped fuel.

[0033] The motor section 10 includes a DC motor having brushes. The fuel pump comprises a substantially cylindrical housing 11 . The housing 11 has an inner edge to which permanent magnets 12 are arranged annularly in the circumferential d...

no. 2 example

[0100] A fuel pump of a second embodiment is described with reference to FIGS. 11 to 13D.

[0101] As shown in FIGS. 12A, 12B, the molded body 50 is constructed from a molded portion 50M and an assembled body 50K, similarly to the first embodiment. In this embodiment, the discharge side cover 40 may not be provided with the connector housing 47 (see FIG. 1 ).

[0102] In the structure of the embodiment, the external connection terminal 51 on the positive electrode side and the external connection terminal 52 on the negative electrode side are also mounted to the holder 57 of the insulator and are also resin molded. Therefore, it is also possible to reduce such an area compared with the conventional structure in which the external connection terminals 51, 52, choke coils 53, 54, and brush terminals 55, 56 are mounted only on the holder 57 and are not resin molded, That is to say through this area, the external connection terminals 51 , 52 , the choke coils 53 , 54 and the brus...

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Abstract

A fuel pump includes a case member defining a fuel passage, an inlet, and an outlet. A pump portion is provided in the fuel passage for pumping fuel from the inlet to the outlet. A motor portion is provided in the case member for driving the pump portion. A positive electrode terminal and a negative electrode terminal are provided for conducting electricity to the motor portion. A holder being insulative is provided inside the case member. The holder is mounted with the positive electrode terminal and the negative electrode terminal. The positive electrode terminal and the negative electrode terminal are resin-molded.

Description

technical field [0001] The invention relates to an electric fuel pump. The invention also relates to a method of manufacturing an electric fuel pump. Background technique [0002] For example, 5520547 (JP-A-7-91343) and US6478613 (JP-T-2002-544425) disclose fuel pumps each of which has a housing member in which a pump portion and a motor portion are mounted. The pump part is driven by means of the armature of the motor part. [0003] As disclosed in US5520547, a fuel pump comprises a discharge side cover and a housing part. The shroud and housing pieces have an outlet and an inlet, respectively, and define a fuel passage. The discharge side cover includes a bearing holder that is insulated and mounts positive and negative electrode terminals. [0004] The motor section is supplied with power from an external power source through positive and negative electrode terminals. [0005] Here, gasoline alternative fuels such as high density alcohol petroleum fuel blends, bio-al...

Claims

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Application Information

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IPC IPC(8): F02M51/00
CPCY02T10/123Y02T10/12
Inventor 高木雅敏伊藤元也
Owner DENSO CORP
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