CN107023427A - High pressure fuel pump - Google Patents

High pressure fuel pump Download PDF

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Publication number
CN107023427A
CN107023427A CN201610857890.7A CN201610857890A CN107023427A CN 107023427 A CN107023427 A CN 107023427A CN 201610857890 A CN201610857890 A CN 201610857890A CN 107023427 A CN107023427 A CN 107023427A
Authority
CN
China
Prior art keywords
high pressure
fuel pump
cylinder head
pressure fuel
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201610857890.7A
Other languages
Chinese (zh)
Other versions
CN107023427B (en
Inventor
M.格赖纳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Bosch Ltd
Original Assignee
Robert Bosch GmbH
Bosch Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH, Bosch Ltd filed Critical Robert Bosch GmbH
Publication of CN107023427A publication Critical patent/CN107023427A/en
Application granted granted Critical
Publication of CN107023427B publication Critical patent/CN107023427B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/04—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps
    • F02M59/06—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps with cylinders arranged radially to driving shaft, e.g. in V or star arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/34—Varying fuel delivery in quantity or timing by throttling of passages to pumping elements or of overflow passages, e.g. throttling by means of a pressure-controlled sliding valve having liquid stop or abutment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/442—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston means preventing fuel leakage around pump plunger, e.g. fluid barriers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0448—Sealing means, e.g. for shafts or housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8038—Fuel injection apparatus manufacture, repair or assembly the assembly involving use of adhesives, glue or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8084—Fuel injection apparatus manufacture, repair or assembly involving welding or soldering

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

The present invention describes a kind of high pressure fuel pump（10）.The high pressure fuel pump（10）Including housing（12）, positioned at the housing（12）On cylinder head（14）, and positioned at the housing（12）It is interior and suitable for being limited to the cylinder head（14）Reciprocating plunger in internal hole（16）.Annular space（18）It is limited to the cylinder head（14）With the housing（12）Between, the annular space（18）Suitable for accommodating spring 20 wherein.Seal（22）Positioned at the housing（12）In, the seal（22）It is supported in fixed to the cylinder head（14）The first static fixture（24）With fixed to roller tappet main body（40）The second static fixture（25）Between and be arranged on the annular space（18）It is interior, the seal（22）Avoid lubricating oil with fuel in the high pressure fuel pump（10）Interior mixing.

Description

High pressure fuel pump
Technical field
This disclosure relates to a kind of high pressure fuel pump, and relate more specifically to a kind of for preventing Fuels And Lubricants in height The device mixed in pressurized fuel pump.
Background technology
Indian patent application 3909/CHE/2014 discloses a kind of high pressure fuel pump.The high pressure fuel pump includes housing, should Housing has multiple depressions, and multiple depressions are suitable to accommodate import, outlet and the plunger in multiple depressions.Induction element is located at many To cause plunger by induction element reciprocating motion in one of individual depression depression.Seal is positioned with reference to induction element and plunger To cause plunger to be moved back and forth by seal.Depression where fuel channel from induction element extends to import, to allow combustion Material flow to import from the depression.
Brief description of the drawings
Embodiment of the disclosure is described with reference to drawings below：
Fig. 1 shows the high pressure fuel pump according to the disclosure.
Embodiment
Fig. 1 shows a kind of high pressure fuel pump 10.The high pressure fuel pump 10 includes housing 12, the cylinder on housing 12 Lid 14 and in the housing 12 and suitable for the reciprocating plunger 16 in the hole being defined in cylinder head 14.Annular space 18 It is limited between cylinder head 14 and housing 12, annular space 18 is suitable in it receive spring 20.Seal 22 is located at housing 12 In, seal 22 is maintained at the first static fixture 24 fixed to cylinder head 14 and the fixed to roller tappet main body 40 Between two static fixtures 25 and it is positioned in the annular space 18, seal 22 prevents lubricating oil with fuel in high compression ignition Expect to mix in pump 10.At least one hole 30 is limited in cylinder head and is in fluid communication with annular space 18, at least one hole 30 are suitable to fuel being transported to outside high pressure fuel pump 10 from annular space 18.
In addition, describing a kind of high pressure fuel pump 10.The high pressure fuel pump 10 includes housing 12, the gas on housing 12 Cylinder cap 14 and in the housing 12 and suitable for the reciprocating plunger 16 in the hole being defined in cylinder head 14.Annular space 18 are limited between cylinder head 14 and housing 12, and annular space 18 is suitable in it receive spring 20.Seal 22 is located at housing In 12, seal 22 is maintained at the first static fixture 24 fixed to cylinder head 14 and fixed to roller tappet main body 40 Between second static fixture 25 and it is positioned in the annular space 18, seal 22 prevents lubricating oil with fuel in high pressure Mixed in petrolift 10.
As shown in figure 1, high pressure fuel pump 10 includes housing 12.Housing 12 includes being used to draw from fuel inlet pipeline 38 firing The compression chamber of material.Plunger 16 is positioned in compression chamber to move back and forth and pressurize so as to through fuel to fuel Export supply path（It is not shown）Transmit fuel.Plunger 16 is connected to roller tappet main body 40, and roller tappet main body 40 is positioned at The lower section of plunger 16 and move back and forth plunger 16 to transmit fuel from high pressure fuel pump 10.
High pressure fuel pump 10 includes seal 22.Seal 22 separates Fuels And Lubricants, and lubricating oil is present in close In the side in the dorsad space 18 of sealing 22.Seal 22 is arranged in annular space 18 and is accommodated in the first static state and fixes Between the static fixture 25 of part 24 and second.The first static static fixture 25 of fixture 24 and second helps to keep with press-fit Seal 22, thus prevents seal 22 from being moved in housing 12.
As shown in figure 1, seal 22 is arranged on the inner periphery of housing 12.The outer surface of seal 22 is slideably and tightly Thickly the inner surface with the housing 12 of high pressure fuel pump 10 is contacted.The first static static fixture 25 of fixture 24 and second is respective Insert in seal 22 and be pressed against housing 12 so that by the first static static fixture 25 of fixture 24 and second to seal 22 power applied help to make to maintain closely contact between seal 22 and housing 12.
Seal 22 has the section for being shaped as circle.As the material of seal 22, it can use with good resistance to combustion The PTFE of material property and high-wearing feature（Polytetrafluoroethylene (PTFE)）.Alternatively, well known in the prior art contribute in sealing can be used Any material that sealing arrangement is provided between part 22 and housing 12 is sealed to high pressure fuel pump 10.Roller tappet main body 40 with Camshaft connects and lifts plunger 16 when needing and transmitting fuel from high pressure fuel pump 10.
Spring member 20 is positioned in annular space 18.Spring member 20 is helped when plunger 16 is moved back and forth in housing 12 When maintain to the resistance of plunger 16.Cylinder head 14 is positioned at the top of housing 12.Cylinder head 14 helps to seal high pressure fuel pump 10. A part for cylinder head 14 is in fluid communication with the annular space 18 being limited in housing 12.Cylinder head 14 includes fuel inlet tube Road 38, fuel inlet pipeline 38 is connected to cylinder head 14.Fuel inlet pipeline 38 supplies fuel to fuel under high pressure from fuel tank The cylinder head 14 of pump 10.
Cylinder head 14 includes hole 26, the first end in the hole be in fluid communication with annular space 18 and the hole the second end It is in fluid communication with outlet conduit 34.Alternatively, cylinder head 14 include multiple holes 26,28,30, this some holes each from annular space 18 first ends being in fluid communication are interconnected to the second end being in fluid communication with outlet conduit 34.Ball 32 is placed in hole 28. Ball 32 prevents fuel from being leaked into from hole 28 outside high pressure fuel pump 10.Zero delivery choke valve 36 is connected to outlet conduit 34.Zero stream Amount choke valve 36 helps prevent the fuel from outlet conduit 34 to be mixed with the fuel from fuel inlet pipeline 38.
The working method of high pressure fuel pump 10 is described as example.Fuel is transported to via fuel inlet pipeline 38 In the compression chamber of high pressure fuel pump 10.Due to the leakage between plunger 16 and cylinder head 14, fuel flowing is oozed by this Leak and flow in annular space 18, thus fill annular space 18.Fuel is flowed in hole 26 from annular space 18.Fuel from Hole 26 flows through hole 30 via hole 28 and flowed in outlet conduit 34.Seal 22 helps prevent Fuels And Lubricants in height Mixed in the housing 12 of pressurized fuel pump 10.The fuel leak from hole 28 is prevented by means of the ball 32 being present in hole 28.
It should be understood that it is that the embodiment illustrated in description above is merely exemplary and do not limit the present invention Scope.The other modifications and variations in many such embodiments and embodiment disclosed in the specification can be devised.This The scope of invention is only limited by the scope of claims.

Claims (8)

1. a kind of high pressure fuel pump（10）, the high pressure fuel pump（10）Including：
Housing（12）；
Cylinder head（14）, it is located at the housing（12）On；
Plunger（16）, it is located at the housing（12）It is interior and suitable for being defined in the cylinder head（14）Back and forth transported in interior hole It is dynamic；
Annular space（18）, it is limited to the cylinder head（14）With the housing（12）Between, the annular space（18）It is suitable Spring is received in Yu Qi（20）；
It is characterized in that
Positioned at the housing（12）In seal（22）, the seal（22）It is maintained at fixed to the cylinder head（14） The first static fixture（24）With fixed to roller tappet main body（40）The second static fixture（25）Between and position In the annular space（18）It is interior, the seal（22）Prevent lubricating oil with fuel in the high pressure fuel pump（10）It is interior mixed Close.
2. high pressure fuel pump as claimed in claim 1（10）, wherein, the described first static fixture（24）Institute can be soldered to State cylinder head（14）And the described second static fixture（25）The roller tappet main body can be soldered to（40）.
3. high pressure fuel pump as claimed in claim 1（10）, wherein, the described first static fixture（24）Institute can be adhered to State cylinder head（14）And the described second static fixture（25）The roller tappet main body can be adhered to（40）.
4. a kind of high pressure fuel pump（10）, the high pressure fuel pump（10）Including：
Housing（12）；
Cylinder head（14）, it is located at the housing（12）On；
Plunger（16）, it is located at the housing（12）It is interior and suitable for being defined in the cylinder head（14）Back and forth transported in interior hole It is dynamic；
Annular space（18）, it is limited to the cylinder head（14）With the housing（12）Between, the annular space（18）It is suitable Spring is received in Yu Qi（20）；
It is characterized in that
Positioned at the housing（12）In seal（22）, the seal（22）It is maintained at fixed to the cylinder head（14） The first static fixture（24）With fixed to roller tappet main body（40）The second static fixture（25）Between and position In the annular space（18）It is interior, the seal（22）Prevent lubricating oil with fuel in the high pressure fuel pump（10）It is interior mixed Close；And
It is limited at the cylinder head（14）In and with the annular space（18）At least one hole being in fluid communication（30）, institute State at least one hole（30）Suitable for by fuel from the annular space（18）It is transported to the high pressure fuel pump（10）Outside.
5. high pressure fuel pump as claimed in claim 4（10）, further comprise and at least one described hole（30）It is in fluid communication Outlet conduit（34）, the outlet conduit（34）Suitable for delivering fuel into the high pressure fuel pump（10）Outside.
6. high pressure fuel pump as claimed in claim 4（10）, further comprise being connected in the outlet conduit（34）And fuel Inlet pipeline（38）Between zero delivery choke valve（36）, the zero delivery choke valve（36）Help prevent from the outlet Road（34）Fuel with from the fuel inlet pipeline（38）Fuel mixing.
7. high pressure fuel pump as claimed in claim 4（10）, wherein, the described first static fixture（24）Institute can be soldered to State cylinder head（14）And the described second static fixture（25）The roller tappet main body can be soldered to（40）.
8. high pressure fuel pump as claimed in claim 4（10）, wherein, the described first static fixture（24）Institute can be adhered to State cylinder head（14）And the described second static fixture（25）The roller tappet main body can be adhered to（40）.
CN201610857890.7A 2015-09-29 2016-09-28 High-pressure fuel pump Active CN107023427B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN5202/CHE/2015 2015-09-29
IN5202CH2015 2015-09-29

Publications (2)

Publication Number Publication Date
CN107023427A true CN107023427A (en) 2017-08-08
CN107023427B CN107023427B (en) 2021-11-23

Family

ID=56851371

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610857890.7A Active CN107023427B (en) 2015-09-29 2016-09-28 High-pressure fuel pump

Country Status (2)

Country Link
EP (1) EP3150842A1 (en)
CN (1) CN107023427B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019160533A1 (en) 2018-02-13 2019-08-22 Cummins Inc. Fuel pump with independent plunger cover and seal

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010043874A1 (en) * 2000-04-18 2001-11-22 Masaaki Sano High Pressure pump
US20030017069A1 (en) * 2001-07-19 2003-01-23 Hitachi, Ltd. High pressure fuel pump for internal combustion engine
CN101137837A (en) * 2005-03-09 2008-03-05 卡特彼勒公司 High pressure pump and method of reducing fluid mixing within same
DE102008002195A1 (en) * 2008-06-04 2009-12-10 Robert Bosch Gmbh Plug-in pump for internal combustion engine, has hollow cylinder and piston end connected with each other in fluid-tight manner by bellows, where annular space enclosing piston is attached to leakage line
CN101968017A (en) * 2010-10-29 2011-02-09 郑国璋 Low pressure difference hydraulic sealing type high-pressure common-rail fuel pump
US20110146600A1 (en) * 2009-12-18 2011-06-23 Caterpillar Inc. Method of cooling a high pressure plunger
CN102741541A (en) * 2009-12-23 2012-10-17 卡特彼勒发动机有限责任两合公司 Purging method and system with scraper or wiper ring for preventing formation of deposits inside fuel pump
EP2620633A1 (en) * 2012-01-30 2013-07-31 Delphi Technologies Holding S.à.r.l. Pump head for a fuel pump
CN103608575A (en) * 2011-06-14 2014-02-26 沃尔沃拉斯特瓦格纳公司 Fuel system and method for reducing fuel leakage from a fuel system
DE102013210032A1 (en) * 2013-05-29 2014-12-04 Robert Bosch Gmbh High-pressure fuel pump for a fuel injection system

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010043874A1 (en) * 2000-04-18 2001-11-22 Masaaki Sano High Pressure pump
US20030017069A1 (en) * 2001-07-19 2003-01-23 Hitachi, Ltd. High pressure fuel pump for internal combustion engine
CN101137837A (en) * 2005-03-09 2008-03-05 卡特彼勒公司 High pressure pump and method of reducing fluid mixing within same
DE102008002195A1 (en) * 2008-06-04 2009-12-10 Robert Bosch Gmbh Plug-in pump for internal combustion engine, has hollow cylinder and piston end connected with each other in fluid-tight manner by bellows, where annular space enclosing piston is attached to leakage line
US20110146600A1 (en) * 2009-12-18 2011-06-23 Caterpillar Inc. Method of cooling a high pressure plunger
CN102741541A (en) * 2009-12-23 2012-10-17 卡特彼勒发动机有限责任两合公司 Purging method and system with scraper or wiper ring for preventing formation of deposits inside fuel pump
CN101968017A (en) * 2010-10-29 2011-02-09 郑国璋 Low pressure difference hydraulic sealing type high-pressure common-rail fuel pump
CN103608575A (en) * 2011-06-14 2014-02-26 沃尔沃拉斯特瓦格纳公司 Fuel system and method for reducing fuel leakage from a fuel system
EP2620633A1 (en) * 2012-01-30 2013-07-31 Delphi Technologies Holding S.à.r.l. Pump head for a fuel pump
DE102013210032A1 (en) * 2013-05-29 2014-12-04 Robert Bosch Gmbh High-pressure fuel pump for a fuel injection system

Also Published As

Publication number Publication date
CN107023427B (en) 2021-11-23
EP3150842A1 (en) 2017-04-05

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