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Title:
HIGH-PRESSURE FUEL SUPPLY PUMP
Document Type and Number:
WIPO Patent Application WO/2019/207906
Kind Code:
A1
Abstract:
Provided is a high-pressure fuel pump configured so that wear caused by the relative rotation between a movable core and a rod can be suppressed. This high-pressure fuel pump is provided with a valve body 30, a rod 35, a stationary core 39, a movable core 36, a rod-biasing spring 40 (first spring), and an anchor-biasing spring 41 (second spring). The rod 35 drives the valve body 30. The stationary core 39 generates a magnetic force. The movable core 36 is configured as a separate body from the rod 35 and is attracted by the stationary core 39 to drive the rod 35. The rod-biasing spring 40 biases the rod 35 toward the valve body 30. The anchor-biasing spring 41 biases the movable core 36 in the direction opposite the direction of biasing by the rod-biasing spring 40. In a state in which the movable core 36 is in contact with the stationary core 39, the load of the anchor-biasing spring 41 is 10% or more of the load of the rod-biasing spring 40.

Inventors:
YAGAI Masamichi (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
MAEDA Naohiro (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
TOKUO Kenichiro (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
ONOSE Toru (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
KAGIYAMA Arata (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
Application Number:
JP2019/004957
Publication Date:
October 31, 2019
Filing Date:
February 13, 2019
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS, LTD. (2520, Takaba Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
International Classes:
F02M59/36; F16K31/06
Domestic Patent References:
WO2016031378A12016-03-03
Foreign References:
JP2016191367A2016-11-10
JP2000508041A2000-06-27
JP2013199924A2013-10-03
JP2010169083A2010-08-05
Attorney, Agent or Firm:
TODA Yuji (6-1, Marunouchi 1-chome, Chiyoda-k, Tokyo 20, 〒1008220, JP)
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