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Title:
HIGH-PRESSURE PUMP
Document Type and Number:
WIPO Patent Application WO/2016/199344
Kind Code:
A1
Abstract:
In this high-pressure pump, a relief valve main body (81) is formed into a rod shape. A relief valve seat part (82) is integrally formed with the relief valve main body at one end thereof so as to be capable of coming into contact with a relief valve seat (612). A relief valve member (80) is provided in a first space (105) so as to be capable of reciprocal movement in the axial direction. A guidance hole (94) connects the surface of a support part main body (91) at the side of a pressurization chamber (103) and the surface thereof at the side of a valve seat part (60), and has the relief valve main body inserted therethrough. In a support part (90), the outer wall of the relief valve main body is supported in a slidable manner by the guidance hole (94) such that the reciprocal movement of the relief valve member in the axial direction is guided. A fuel guiding part (84) is provided to the pressurization-chamber-side end of the relief valve main body, and is capable of guiding fuel such that the fuel passing through from the pressurization-chamber side towards the valve-seat-part side flows outwards in the radial direction of the relief valve main body. As a result, change in the valve opening pressure of the relief valve member over time can be suppressed for a long period of time.

Inventors:
KOGA, Tatsuro (C/O DENSO CORPORATION, 1-1 Showa-cho, Kariya-cit, Aichi 61, 〒4488661, JP)
MATSUMOTO, Noriya (C/O DENSO CORPORATION, 1-1 Showa-cho, Kariya-cit, Aichi 61, 〒4488661, JP)
TANIZAWA, Seiji (C/O DENSO CORPORATION, 1-1 Showa-cho, Kariya-cit, Aichi 61, 〒4488661, JP)
Application Number:
JP2016/002290
Publication Date:
December 15, 2016
Filing Date:
May 10, 2016
Export Citation:
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Assignee:
DENSO CORPORATION (1-1 Showa-cho, Kariya-city Aichi, 61, 〒4488661, JP)
International Classes:
F02M59/46; F02M69/54; F16K17/04
Foreign References:
JP2015075049A2015-04-20
JP2015055230A2015-03-23
JP2012052464A2012-03-15
JPH0566378U1993-09-03
JP2013253526A2013-12-19
Attorney, Agent or Firm:
KIN, Junhi (6th Floor, Takisada Bldg. 2-13-19, Nishiki, Naka-ku, Nagoya-cit, Aichi 03, 〒4600003, JP)
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