Title:
FUEL SUPPLY PUMP
Document Type and Number:
WIPO Patent Application WO/2019/131049
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a fuel supply pump that, in order to suppress seizing of a plunger which can occur with higher fuel pressures, improves lubrication of the plunger that moves reciprocally along the inner circumference of a cylinder. This fuel supply pump comprises a plunger that moves reciprocally in the inner circumferential section of a cylinder, and a pressurization chamber that is pressurized by the plunger, wherein an annular groove is formed in an outer circumferential section of the plunger, and at bottom dead center, the annular groove is configured so as to be positioned closer to the pressurization chamber than to an axial-direction central position of a cylinder sliding region.
More Like This:
| JP6685159 | Fuel pump protection structure |
| JP2009209800 | FUEL INJECTION PUMP |
| WO/2004/022975 | PUMP, ESPECIALLY FOR A FUEL INJECTION DEVICE FOR AN INTERNAL COMBUSTION ENGINE |
Inventors:
TAMURA SHINGO (JP)
TOKUO KENICHIRO (JP)
SUGANAMI MASAYUKI (JP)
TOKUMARU KAZUAKI (JP)
TOKUO KENICHIRO (JP)
SUGANAMI MASAYUKI (JP)
TOKUMARU KAZUAKI (JP)
Application Number:
PCT/JP2018/045020
Publication Date:
July 04, 2019
Filing Date:
December 07, 2018
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
F02M59/44; F02M59/34
Foreign References:
| JPH11280601A | 1999-10-15 | |||
| JP2001041129A | 2001-02-13 | |||
| JP2006307829A | 2006-11-09 | |||
| JP2004340052A | 2004-12-02 | |||
| JP2003222062A | 2003-08-08 |
Attorney, Agent or Firm:
TODA Yuji (JP)
Download PDF:
Previous Patent: PULP MOLDED PRODUCT AND METHOD FOR MANUFACTURING SAME
Next Patent: PHYSICAL QUANTITY DETECTING DEVICE
Next Patent: PHYSICAL QUANTITY DETECTING DEVICE