EP3150842A1 - Pompe à carburant haute pression - Google Patents

Pompe à carburant haute pression Download PDF

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Publication number
EP3150842A1
EP3150842A1 EP16182769.6A EP16182769A EP3150842A1 EP 3150842 A1 EP3150842 A1 EP 3150842A1 EP 16182769 A EP16182769 A EP 16182769A EP 3150842 A1 EP3150842 A1 EP 3150842A1
Authority
EP
European Patent Office
Prior art keywords
high pressure
fuel pump
pressure fuel
cylinder head
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.)
Withdrawn
Application number
EP16182769.6A
Other languages
German (de)
English (en)
Inventor
Matthias Greiner
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 EP3150842A1 publication Critical patent/EP3150842A1/fr
Withdrawn legal-status Critical Current

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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

Definitions

  • This disclosure relates to a high pressure fuel pump, and more particularly to an apparatus for preventing fuel mixing with lubrication oil in the high pressure fuel pump.
  • Indian Patent Application Number 3909/CHE/2014 discloses a high pressure fuel pump.
  • the high pressure fuel pump comprises a housing having a plurality of recesses adapted to accommodate an inlet, an outlet, and a plunger in the plurality of recesses.
  • a guide element is located in one of the plurality of recesses such that the plunger reciprocates through the guide element.
  • a seal is located with reference to the guide element and the plunger such that the plunger reciprocates through the seal.
  • a fuel passageway extends from the recess in which the guide element is located to the inlet to allow fuel to flow from the recess to the inlet.
  • FIG 1 illustrates a high pressure fuel pump 10.
  • the high pressure fuel pump 10 comprises a housing 12, a cylinder head 14 located on the housing 12, and a plunger 16 located within the housing 12 and adapted to reciprocate within a bore defined within the cylinder head 14.
  • An annular space 18 is defined between the cylinder head 14 and the housing 12, the annular space 18 adapted to receive a spring 20 therein.
  • a seal 22 is located in the housing 12, the seal 22 held between a first static fixation 24 that is secured to the cylinder head 14 and a second static fixation 25 that is secured to a roller tappet body 40 and positioned within said annular space 18, the seal 22 prevents lubrication oil mixing with fuel within the high pressure fuel pump 10.
  • At least one bore 30 is defined in the cylinder head and in flow communication with the annular space 18, the at least one bore 30 adapted to channel fuel from the annular space 18 out of the high pressure fuel pump 10.
  • the high pressure fuel pump 10 comprises a housing 12, a cylinder head 14 located on the housing 12, and a plunger 16 located within the housing 12 and adapted to reciprocate within a bore defined within the cylinder head 14.
  • An annular space 18 is defined between the cylinder head 14 and the housing 12, the annular space 18 adapted to receive a spring 20 therein.
  • a seal 22 is located in the housing 12, the seal 22 held between a first static fixation 24 that is secured to the cylinder head 14 and a second static fixation 25 that is secured to a roller tappet body 40 and positioned within said annular space 18, the seal 22 prevents lubrication oil mixing with fuel within the high pressure fuel pump 10.
  • the high pressure fuel pump 10 includes a housing 12.
  • the housing 12 includes a compression chamber for sucking fuel from a fuel inlet pipe 38.
  • a plunger 16 is positioned within the compression chamber to reciprocate and pressurize fuel for delivery through a fuel outlet supply path (not shown).
  • the plunger 16 is coupled to a roller tappet body 40 that is positioned below the plunger 16, and reciprocates the plunger 16 to deliver fuel from the high pressure fuel pump 10.
  • the high pressure fuel pump 10 includes a seal 22.
  • the seal 22 separates fuel from lubrication oil that is present in the side of the seal 22 opposite that of the spacing 18.
  • the seal 22 is provided in an annular space 18 and housed between a first static fixation 24 and a second static fixation 25.
  • the first static fixation 24 and the second static fixation 25 facilitates retaining the seal 22 in a press fit, thereby preventing movement of the seal 22 within the housing 12.
  • the seal 22 is provided on an inner periphery of the housing 12.
  • the seal 22 has an outer surface that slidably and tightly contacts with the inner surface of the housing 12 of the high pressure fuel pump 10.
  • the first static fixation 24 and the second static fixation 25 are each inserted within the seal 22 and pressed against the housing 12 such that the force exerted by the first static fixation 24 and the second static fixation 25 against the seal 22 facilitates maintaining a tight contact between the seal 22 and the housing 12.
  • the seal 22 has a cross section that is circular in shape.
  • PTFE polytetrafluoroethylene
  • any material known in the art that facilitates providing a sealing arrangement between the seal 22 and the housing 12 may be used to seal the high pressure fuel pump 10.
  • the roller tappet body 40 is in communication with a cam shaft and lifts the plunger 16 when it is required to deliver fuel from the high pressure fuel pump 10.
  • a spring member 20 is positioned within the annular space 18.
  • the spring member 20 facilitates maintaining resistance against the plunger 16 when the plunger 16 reciprocates within the housing 12.
  • a cylinder head 14 is positioned above the housing 12.
  • the cylinder head 14 facilitates sealing the high pressure fuel pump 10.
  • a portion of the cylinder head 14 is in flow communication with the annular space 18 that is defined in the housing 12.
  • the cylinder head 14 includes a fuel inlet pipe 38 that is coupled to the cylinder head 14.
  • the fuel inlet pipe 38 supplies fuel from a fuel tank to the cylinder head 14 of the high pressure fuel pump 10.
  • the cylinder head 14 includes a bore 26 a first end of the bore is in flow communication with the annular space 18 and a second end of the bore is in flow communication with an outlet pipe 34.
  • the cylinder head 14 includes a plurality of bores 26, 28, 30 that are each interconnected from a first end that is flow communication with the annular space 18 to a second end that is in flow communication with the outlet pipe 34.
  • a ball 32 is placed in the bore 28. The ball 32 prevents escape of fuel from the bore 28 out of the high pressure fuel pump 10.
  • a zero delivery throttle 36 is coupled to the outlet pipe 34. The zero delivery throttle 36 facilitates preventing fuel from the outlet pipe 34 from mixing with fuel from the fuel inlet pipe 38.
  • the working of the high pressure fuel pump 10 is described as an example.
  • Fuel is channeled into the compression chamber of the high pressure fuel pump 10 via the fuel inlet pipe 38. Due to leakage between the plunger 16 and the cylinder head 14, the fuel flows through the leakage and into the annular space 18, thereby filling the annular space 18. From the annular space 18, the fuel flows into the bore 26. From the bore 26, the fuel flows through the bore 30, via the bore 28 and into the outlet pipe 34.
  • the seal 22 facilitates preventing mixing of fuel with lubrication oil within the housing 12 of the high pressure fuel pump 10. The leakage of fuel from the bore 28 is prevented by means of the ball 32 that is present in the bore 28.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)
EP16182769.6A 2015-09-29 2016-08-04 Pompe à carburant haute pression Withdrawn EP3150842A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IN5202CH2015 2015-09-29

Publications (1)

Publication Number Publication Date
EP3150842A1 true EP3150842A1 (fr) 2017-04-05

Family

ID=56851371

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16182769.6A Withdrawn EP3150842A1 (fr) 2015-09-29 2016-08-04 Pompe à carburant haute pression

Country Status (2)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11268485B2 (en) 2018-02-13 2022-03-08 Cummins Inc. Fuel pump with independent plunger cover and seal

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008002195A1 (de) * 2008-06-04 2009-12-10 Robert Bosch Gmbh Steckpumpe für eine Verbrennungskraftmaschine
US20110146600A1 (en) * 2009-12-18 2011-06-23 Caterpillar Inc. Method of cooling a high pressure plunger
EP2620633A1 (fr) * 2012-01-30 2013-07-31 Delphi Technologies Holding S.à.r.l. Tête de pompe pour pompe à carburant
DE102013210032A1 (de) * 2013-05-29 2014-12-04 Robert Bosch Gmbh Kraftstoffhochdruckpumpe für ein Kraftstoffeinspritzsystem

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3884897B2 (ja) * 2000-04-18 2007-02-21 トヨタ自動車株式会社 高圧ポンプ
JP3787508B2 (ja) * 2001-07-19 2006-06-21 株式会社日立製作所 高圧燃料供給ポンプ
US8061328B2 (en) * 2005-03-09 2011-11-22 Caterpillar Inc. High pressure pump and method of reducing fluid mixing within same
EP2339166A1 (fr) * 2009-12-23 2011-06-29 Caterpillar Motoren GmbH & Co. KG Procédé de purge et système avec racleur ou anneau racleur pour empêcher la formation de dépôts dans une pompe à carburant
CN101968017B (zh) * 2010-10-29 2012-05-02 郑国璋 低压差液力密封式高压共轨燃油泵
RU2587030C2 (ru) * 2011-06-14 2016-06-10 Вольво Ластвагнар Аб Топливная система и способ снижения утечки топлива из топливной системы

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008002195A1 (de) * 2008-06-04 2009-12-10 Robert Bosch Gmbh Steckpumpe für eine Verbrennungskraftmaschine
US20110146600A1 (en) * 2009-12-18 2011-06-23 Caterpillar Inc. Method of cooling a high pressure plunger
EP2620633A1 (fr) * 2012-01-30 2013-07-31 Delphi Technologies Holding S.à.r.l. Tête de pompe pour pompe à carburant
DE102013210032A1 (de) * 2013-05-29 2014-12-04 Robert Bosch Gmbh Kraftstoffhochdruckpumpe für ein Kraftstoffeinspritzsystem

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11268485B2 (en) 2018-02-13 2022-03-08 Cummins Inc. Fuel pump with independent plunger cover and seal

Also Published As

Publication number Publication date
CN107023427A (zh) 2017-08-08
CN107023427B (zh) 2021-11-23

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