JP2012163111A5 - - Google Patents

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Publication number
JP2012163111A5
JP2012163111A5 JP2012126672A JP2012126672A JP2012163111A5 JP 2012163111 A5 JP2012163111 A5 JP 2012163111A5 JP 2012126672 A JP2012126672 A JP 2012126672A JP 2012126672 A JP2012126672 A JP 2012126672A JP 2012163111 A5 JP2012163111 A5 JP 2012163111A5
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JP
Japan
Prior art keywords
cylinder
pressure fuel
fuel
low
chamber
Prior art date
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Granted
Application number
JP2012126672A
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Japanese (ja)
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JP5625016B2 (en
JP2012163111A (en
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Publication date
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Priority to JP2012126672A priority Critical patent/JP5625016B2/en
Priority claimed from JP2012126672A external-priority patent/JP5625016B2/en
Publication of JP2012163111A publication Critical patent/JP2012163111A/en
Publication of JP2012163111A5 publication Critical patent/JP2012163111A5/ja
Application granted granted Critical
Publication of JP5625016B2 publication Critical patent/JP5625016B2/en
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Claims (2)

ポンプボディに組合されたシリンダと、
前記ポンプボディとの間で前記シリンダを挟むシリンダホルダと、
シリンダに滑合して往復動するプランジャと、
前記プランジャの一端部により燃料が加圧される加圧室と、
前記加圧室に吸入される燃料が通過する低圧燃料通路と、
前記低圧燃料通路に連通し、前記シリンダホルダとシンリンダとで形成される低圧燃料室とを備え、
前記プランジャの外周部には前記シリンダと滑合する部分よりも直径が小さい段付き部を有し、
前記段付き部は、前記低圧燃料室の燃料を加圧又は減圧することで、前記低圧燃料通路に燃料を吐出し、または前記低圧燃料室に燃料を吸入し、
前記低圧燃料室と前記低圧通路との間の燃料流動は、前記シリンダと前記シリンダホルダとの間に設けた孔若しくは溝を通るように構成された高圧燃料供給ポンプ。
A cylinder combined with the pump body;
A cylinder holder that sandwiches the cylinder with the pump body;
A plunger that slides back and forth in a cylinder,
A pressurizing chamber in which fuel is pressurized by one end of the plunger;
A low-pressure fuel passage through which fuel sucked into the pressurizing chamber passes,
A low pressure fuel chamber communicating with the low pressure fuel passage and formed by the cylinder holder and a cylinder;
The outer peripheral portion of the plunger has a stepped portion having a smaller diameter than the portion that slides on the cylinder,
The stepped portion pressurizes or depressurizes the fuel in the low pressure fuel chamber, thereby discharging the fuel into the low pressure fuel passage, or sucking the fuel into the low pressure fuel chamber,
A high-pressure fuel supply pump configured to allow a fuel flow between the low-pressure fuel chamber and the low-pressure passage to pass through a hole or a groove provided between the cylinder and the cylinder holder.
請求項1に記載のものにおいて、
前記孔若しくは溝が、前記シリンダの周囲に沿う方向の幅(B)よりも中心軸線から放射方向の寸法(Hあるいはm)の方が小さく形成されている高圧燃料供給ポンプ。
In claim 1,
The high-pressure fuel supply pump in which the hole or groove is formed so that a radial dimension (H or m) from the central axis is smaller than a width (B) in a direction along the circumference of the cylinder.
JP2012126672A 2012-06-04 2012-06-04 High pressure fuel pump Active JP5625016B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2012126672A JP5625016B2 (en) 2012-06-04 2012-06-04 High pressure fuel pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2012126672A JP5625016B2 (en) 2012-06-04 2012-06-04 High pressure fuel pump

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP2008279043A Division JP5017233B2 (en) 2008-10-30 2008-10-30 High pressure fuel pump

Publications (3)

Publication Number Publication Date
JP2012163111A JP2012163111A (en) 2012-08-30
JP2012163111A5 true JP2012163111A5 (en) 2012-11-01
JP5625016B2 JP5625016B2 (en) 2014-11-12

Family

ID=46842697

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2012126672A Active JP5625016B2 (en) 2012-06-04 2012-06-04 High pressure fuel pump

Country Status (1)

Country Link
JP (1) JP5625016B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015219419B3 (en) * 2015-10-07 2017-02-23 Continental Automotive Gmbh Pumping device and fuel supply device for an internal combustion engine and mixing device, in particular for a motor vehicle
DE102015219415B4 (en) 2015-10-07 2020-07-09 Vitesco Technologies GmbH High-pressure fuel pump and fuel supply device for an internal combustion engine, in particular a motor vehicle

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3327438B2 (en) * 1995-02-01 2002-09-24 愛三工業株式会社 Electromagnetic fuel injection valve
JP3477334B2 (en) * 1996-11-29 2003-12-10 三菱重工業株式会社 Fuel injection pump and unit injector using the same
EP1471247B1 (en) * 1999-02-09 2006-10-18 Hitachi, Ltd. High pressure fuel supply pump for internal combustion engine
EP1348868B8 (en) * 2001-01-05 2007-06-13 Hitachi, Ltd. Fluid pump and high-pressure fuel feed pump
DE10134069B4 (en) * 2001-07-13 2011-07-07 Robert Bosch GmbH, 70469 Fuel pump for a fuel system of an internal combustion engine
JP2007064076A (en) * 2005-08-30 2007-03-15 Toyota Motor Corp Fuel injection device for internal combustion engine
JP4648254B2 (en) * 2006-06-22 2011-03-09 日立オートモティブシステムズ株式会社 High pressure fuel pump
JP4625789B2 (en) * 2006-07-20 2011-02-02 日立オートモティブシステムズ株式会社 High pressure fuel pump

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