Title:
HIGH-PRESSURE PUMP
Document Type and Number:
WIPO Patent Application WO/2018/133876
Kind Code:
A1
Abstract:
A high-pressure pump comprises: a pressure chamber; a piston sleeve (3) arranged inside the pressure chamber; and a protruding component (8) arranged at an outer side of the piston sleeve (3) and attached, in a manner of interference fit, to a wall of the pressure chamber. The piston sleeve (3) comprises a first section (31) and a second section (32) connected thereto. The protruding component (8) is arranged at an outer side of the second section (32) close to the first section (31), and divides the pressure chamber into a first pressure chamber (1) and a second pressure chamber (2). The first section (31) is located inside the first pressure chamber (1). By moving down the location of the protruding component (8), provided that the volumetric efficiency is unchanged, the high-pressure pump can achieve a larger piston gap and less piston pair wear during an oil suction process, and can achieve a longer service life.
Inventors:
LI QING (CN)
WU ZHONGYU (CN)
ZHU YIN (CN)
DONG HAOXUN (CN)
WU ZHONGYU (CN)
ZHU YIN (CN)
DONG HAOXUN (CN)
Application Number:
PCT/CN2018/073787
Publication Date:
July 26, 2018
Filing Date:
January 23, 2018
Export Citation:
Assignee:
UNITED AUTOMOTIVE ELECT SYS CO (CN)
International Classes:
F02M59/44
Foreign References:
| CN106762299A | 2017-05-31 | |||
| CN206439132U | 2017-08-25 | |||
| CN106103989A | 2016-11-09 | |||
| JPH07217742A | 1995-08-15 | |||
| JPH09264305A | 1997-10-07 | |||
| CN204458157U | 2015-07-08 | |||
| CN205225549U | 2016-05-11 |
Other References:
See also references of EP 3572664A4
Attorney, Agent or Firm:
SHANGHAI SAVVY INTELLECTUAL PROPERTY AGENCY (CN)
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