Title:
FUEL PUMP
Document Type and Number:
WIPO Patent Application WO/2022/014150
Kind Code:
A1
Abstract:
The present invention provides a fuel pump in which sticking of a plunger can be suppressed. The fuel pump according to the present invention includes a plunger 2 that reciprocates, a cylinder 6 in which a guide hole 6a that guides the reciprocating motion of the plunger 2 extends in the axial direction, and a pump body 1 that holds the cylinder 6. The pump body 1 has a cylinder insertion hole 1g into which the cylinder 6 is inserted, and a pressurizing chamber 11 that communicates with the cylinder insertion hole 1g and has a volume that is increased or decreased by the reciprocating motion of the plunger 2. The cylinder 6 has a press-fitting portion 6b that is press-fitted into the inner peripheral surface of the cylinder insertion hole 1g, and a groove 6d formed at a position corresponding to the press-fitting portion 6b on the inner peripheral surface of the guide hole 6a.
More Like This:
| JP4296206 | Fuel supply device |
| WO/2005/038234 | FUEL PUMP WITH MULTIPLE CAMS |
| WO/1997/047883 | HIGH PRESSURE PUMP FOR ALL LIQUIDS |
Inventors:
TAMURA SHINGO (JP)
USUI SATOSHI (JP)
TOKUMARU KAZUAKI (JP)
USUI SATOSHI (JP)
TOKUMARU KAZUAKI (JP)
Application Number:
PCT/JP2021/019018
Publication Date:
January 20, 2022
Filing Date:
May 19, 2021
Export Citation:
Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
F02M59/04; F02M59/44
Domestic Patent References:
| WO2018186219A1 | 2018-10-11 |
Foreign References:
| DE102004063074A1 | 2006-07-06 | |||
| JPH10318091A | 1998-12-02 | |||
| JP2016070087A | 2016-05-09 | |||
| JP2007231959A | 2007-09-13 | |||
| JP2018105274A | 2018-07-05 | |||
| JP2009185613A | 2009-08-20 | |||
| DE102014010718A1 | 2016-01-21 |
Attorney, Agent or Firm:
SHIN-YU INTERNATIONAL PATENT FIRM (JP)
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