Title:
HIGH-PRESSURE FUEL SUPPLY PUMP
Document Type and Number:
WIPO Patent Application WO/2018/061471
Kind Code:
A1
Abstract:
The interior of a solenoid section will be filled with fuel due to the configuration of the components thereof. Accordingly, movement of a plunger will lead to flow separation in the vicinity of a protrusion part of an engagement member inside a fuel passage, making it liable for cavitation to occur. In light of the above-mentioned problem, the present invention provides a high-pressure fuel supply pump comprising a suction valve disposed on a suction side of a pressurizing chamber, an engagement member having a protrusion part that protrudes toward the outer periphery and biasing the suction valve by use of the force of a spring, a stator for generating a magnetic attraction force, and a plunger drawn by the magnetic attraction force and driving the engagement member toward the stator by engaging with the protrusion part, the fuel supply pump being configured so that the area of the fuel passage is smallest between the outer periphery of the protrusion part and the inner periphery of the plunger, and so that a tapered section whereby the area of the flow path increases from the portion where the area of the passage is smallest toward the pressurizing chamber or toward the suction valve side is formed.
Inventors:
KODAMA YUITSU (JP)
YOSHINARI YUKIHIRO (JP)
TOKUO KENICHIRO (JP)
TAKAHASHI YUUKI (JP)
YOSHINARI YUKIHIRO (JP)
TOKUO KENICHIRO (JP)
TAKAHASHI YUUKI (JP)
Application Number:
PCT/JP2017/027988
Publication Date:
April 05, 2018
Filing Date:
August 02, 2017
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
F02M59/36; F02M59/34
Foreign References:
| JP2016142143A | 2016-08-08 | |||
| JP2015190532A | 2015-11-02 | |||
| JP2016094913A | 2016-05-26 | |||
| JP2005139953A | 2005-06-02 | |||
| JP2012251447A | 2012-12-20 |
Other References:
See also references of EP 3521608A4
Attorney, Agent or Firm:
TODA Yuji (JP)
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