Title:
HIGH-PRESSURE FUEL PUMP
Document Type and Number:
WIPO Patent Application WO/2015/182293
Kind Code:
A1
Abstract:
The purpose of the present invention is to reduce the striking force of the movable element of a high-pressure fuel pump to thereby reduce operation noise caused by the striking of the movable element.
A high-pressure fuel pump is provided with: a pressurizing chamber for pressurizing fuel; and an electromagnetic suction valve mechanism provided on the suction side of the pressurizing chamber and opening and closing a fuel passage located on the suction side. The high-pressure fuel pump is configured in such a manner that: the electromagnetic suction valve mechanism is provided with a movable section moved by magnetic attraction force; a cavity section, the volume of which is increased and decreased by the movement of the movable section, is formed on the outer peripheral side of the movable section; a fuel passage for supplying fuel from the cavity section toward the pressurizing chamber is formed; and the area of a flow passage for fuel discharged from the fuel passage decreases as the movable section is moved by magnetic attraction force.
Inventors:
KUNIYOSHI HIROYASU (JP)
ARITOMI SHUNSUKE (JP)
TOKUO KENICHIROU (JP)
ARITOMI SHUNSUKE (JP)
TOKUO KENICHIROU (JP)
Application Number:
PCT/JP2015/062167
Publication Date:
December 03, 2015
Filing Date:
April 22, 2015
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
F02M59/44; F02M59/34
Foreign References:
| JP2000161522A | 2000-06-16 | |||
| JP2013032750A | 2013-02-14 |
Attorney, Agent or Firm:
INOUE Manabu et al. (JP)
Manabu Inoue (JP)
Manabu Inoue (JP)
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