Title:
FUEL PUMP
Document Type and Number:
WIPO Patent Application WO/2017/033720
Kind Code:
A1
Abstract:
A fuel pump is provided with: an outer gear (30); an inner gear (20) eccentric to and in mesh with the outer gear (30); and a pump housing (11) for rotatably accommodating both gears (20, 30). Both gears (20, 30) rotate while increasing and reducing the volume of a plurality of pump chambers (40) formed between the gears (20, 30), thereby sequentially sucking in fuel into each of the pump chambers (40) and discharging the fuel. The pump housing (11) has: a slide surface (75) on which both gears (20, 30) slide; a suction groove (18) recessed from the slide surface (75) and guiding fuel which is on the suction side; a discharge passage (17) recessed from the slide surface (75) and guiding fuel which is on the discharge side; and communication grooves (77, 78) which is recessed from the slide surface (75), is formed in a circular arc shape along the circle (Cc) circumscribed about the inner gear (20), and is in communication with both the suction groove (18) and the discharge passage (17) through both groove ends.
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Inventors:
SAKAI HIROMI (JP)
FURUHASHI DAIJI (JP)
FURUHASHI DAIJI (JP)
Application Number:
PCT/JP2016/073240
Publication Date:
March 02, 2017
Filing Date:
August 08, 2016
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
F02M37/08; F04C2/10; F04C15/06
Foreign References:
| JP2015500953A | 2015-01-08 | |||
| JPH0925809A | 1997-01-28 | |||
| JP2014196706A | 2014-10-16 | |||
| JP2012251523A | 2012-12-20 | |||
| JP2012036861A | 2012-02-23 | |||
| JPH0996280A | 1997-04-08 | |||
| JP2001280261A | 2001-10-10 |
Attorney, Agent or Firm:
JIN Shunji (JP)
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