EP1884656A1 - Förderpumpe zur Einspritzung von Benzin unter hohem Druck - Google Patents

Förderpumpe zur Einspritzung von Benzin unter hohem Druck Download PDF

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Publication number
EP1884656A1
EP1884656A1 EP07290936A EP07290936A EP1884656A1 EP 1884656 A1 EP1884656 A1 EP 1884656A1 EP 07290936 A EP07290936 A EP 07290936A EP 07290936 A EP07290936 A EP 07290936A EP 1884656 A1 EP1884656 A1 EP 1884656A1
Authority
EP
European Patent Office
Prior art keywords
piston
cam
oil
pump according
roller
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
EP07290936A
Other languages
English (en)
French (fr)
Other versions
EP1884656B1 (de
Inventor
Florent Sellas
Eric Martin
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.)
Continental Automotive France SAS
Original Assignee
Continental Automotive France SAS
Siemens Automotive Hydraulics SA
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 Continental Automotive France SAS, Siemens Automotive Hydraulics SA filed Critical Continental Automotive France SAS
Publication of EP1884656A1 publication Critical patent/EP1884656A1/de
Application granted granted Critical
Publication of EP1884656B1 publication Critical patent/EP1884656B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/24—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke
    • F02M59/26—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movements of pistons relative to their cylinders
    • 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
    • F02M59/24—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke
    • 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
    • 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
    • F04B1/0413—Cams
    • 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
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
    • F04B43/084—Machines, pumps, or pumping installations having flexible working members having tubular flexible members the tubular member being deformed by stretching or distortion
    • 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
    • F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements

Definitions

  • the present invention relates to improvements to pumps for injection of high pressure gasoline of the type comprising a piston displacing hydraulic fluid in a deformable element such as a bellows, the deformations of said bellows in a cylindrical chamber filled with fuel causing a effect of pumping said fuel to high pressure injectors.
  • the present invention aims to provide a solution to two problems that the mounting of this type of pump on motors.
  • the first problem is that on some engines it is necessary to integrate the high-pressure direct injection pump at the end of the camshaft or on the transmission pulleys and not directly on the cylinder head.
  • an angle gear is necessary, which entails various disadvantages, such as: bulkiness of the pump, need for an adaptation box, lubrication means, noise, wear of elements etc ...
  • the second problem stems from the fact that for such an assembly it is necessary to provide an operating clearance between the drive means of the pump and the latter, such as the Oldham seal type.
  • the pump When the pump is single-piston, there will be significant variations in the resistive torque of the pump, with even, possibly negative peaks, variations that can lead to detachment of the contacting faces that transmit the torque, detachment that is generating returns of torque in the motor shaft. These torque returns are a disruptive element for the operation of the engine such as: torque surges on the camshaft or timing chain, unacceptable noise.
  • the solution to the first problem is to design the pump so that the oil part includes not only the pumping part but also the entire drive and angle transmission part.
  • the solution of the second problem is to have a free wheel between the drive shaft and the cam.
  • the pump according to the invention comprises a drive shaft 1, connected by an Oldham seal 2 to the drive member (camshaft for example) not shown.
  • This tree is carried by a housing 3.
  • This shaft carries a cam 5, which in the example shown has four lobes 6.
  • a piston 10 is supported by means of a spring 11, against the cam 5, with the interposition between the piston 10 and the cam 5 of a roller 7, carried by a shaft 8 by means of a roller bearing. needles 9.
  • a support piece 12 is interposed between the roller 7 and the piston 10.
  • This support piece 12 advantageously consists of two bowls 12a, 12b, separated by a partition 12c provided with a plurality of orifices 23.
  • the outer wall of the support piece 12 has recesses which facilitate the passage of the oil around this piece 12.
  • the end 13a of the sleeve 13 enters a bellows 14, provided at its lower end with a circular part 15, reftentioned by a return spring 16.
  • a disk 17 which has in its center a bore 19, in which slides a finger 18, carried by said circular part 15 at its center. This ensures correct guidance of the bellows 14 during its successive elongations.
  • the guiding of the bellows 14 makes it possible to decrease and to adjust as best as possible the diameter of the chamber 20 in which said bellows is struggling; this chamber 20 being filled with fuel.
  • FIG. 1 it can be seen that the cam 5 rotates inside a circular chamber 21 formed inside the housing 3.
  • This room 21; the bore 22 inside which the roller 7, the bearing piece 12 and the upper part of the piston 10 slide; the internal bore 10a of said piston; the internal bore of the sheath 13 and the inside of the bellows 14 are filled by the hydraulic fluid.
  • This liquid passes around the part 12 and also inside where it passes through the partition 12a through the orifices 23; then it enters the internal bore 10a of the piston 10 through the orifice 24 and passes through the disc 17 through the orifices 25.
  • a volume compensator 26 which communicates with the chamber 21 in which the cam 5 ( Figure 1).
  • a nonreturn valve 28 is disposed in the internal bore 10a of the piston 10.
  • FIG. 3 represents an alternative embodiment of the upper part of FIG. 2 illustrating the drive mechanism of the cam 5.
  • the cam 5 is, in this example, in one piece with the drive shaft 1, the Oldham 2 seal transmission comprising a freewheel mechanism 3.
  • the cam portion 5 comprises a cylindrical bowl 32 in which is engaged a cylindrical axis 31 with interposition between said axis 31 and the inner wall of the bowl of a guide member.
  • the bearing 4 carrying the shaft 1 is located outside the housing 3, the lip seal 30 being in the housing 3, between the bearing 4 and the cam 5.
  • the bearing 4 is not lubricated by the hydraulic oil but by the engine oil.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Jet Pumps And Other Pumps (AREA)
EP07290936A 2006-08-04 2007-07-25 Förderpumpe zur Einspritzung von Benzin unter hohem Druck Not-in-force EP1884656B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0607181A FR2904665B1 (fr) 2006-08-04 2006-08-04 Pompe transfert pour injection d'essence a haute pression

Publications (2)

Publication Number Publication Date
EP1884656A1 true EP1884656A1 (de) 2008-02-06
EP1884656B1 EP1884656B1 (de) 2009-11-25

Family

ID=37986503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07290936A Not-in-force EP1884656B1 (de) 2006-08-04 2007-07-25 Förderpumpe zur Einspritzung von Benzin unter hohem Druck

Country Status (7)

Country Link
US (1) US20080175731A1 (de)
EP (1) EP1884656B1 (de)
JP (1) JP2008038909A (de)
KR (1) KR20080012799A (de)
AT (1) ATE449905T1 (de)
DE (1) DE602007003414D1 (de)
FR (1) FR2904665B1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010060761A1 (de) * 2008-11-25 2010-06-03 Schaeffler Kg Rollenstössel
FR2961561A1 (fr) * 2010-06-22 2011-12-23 Bosch Gmbh Robert Pompe a piston
WO2018146340A1 (en) * 2017-02-13 2018-08-16 Delphi Technologies Ip Limited Damper
FR3105207A1 (fr) 2019-12-23 2021-06-25 Syctom L'agence Metropolitaine Des Dechets Menagers Dispositif d’injection sous haute pression d’un mélange humide
FR3105252A1 (fr) 2019-12-23 2021-06-25 Syctom L'agence Metropolitaine Des Dechets Menagers Dispositif d’injection sous haute pression d’une ressource organique
FR3112089A1 (fr) 2020-07-02 2022-01-07 Commissariat A L'energie Atomique Et Aux Energies Alternatives Dispositif d’injection sous haute pression d’un effluent

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009270693A (ja) * 2008-05-12 2009-11-19 Ntn Corp ポンプ用タペット
KR20110013367A (ko) * 2008-05-12 2011-02-09 에누티에누 가부시키가이샤 펌프용 태핏
JP2009293395A (ja) * 2008-06-02 2009-12-17 Ntn Corp ポンプ用タペット
JP2009293604A (ja) * 2008-06-09 2009-12-17 Ntn Corp ポンプ用タペット
JP2009293393A (ja) * 2008-06-02 2009-12-17 Ntn Corp ポンプ用タペット
GB201520677D0 (en) * 2015-11-24 2016-01-06 Delphi Internat Operations Luxembourg S À R L High pressure fuel pump

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19955298A1 (de) * 1998-11-19 2000-05-25 Luk Fahrzeug Hydraulik Fördereinrichtung für einen Kraftstoff
FR2826068A1 (fr) * 2001-06-19 2002-12-20 Siemens Automotive Hydraulics Dispositif de regulation de debit pour pompe transfert a carburant
FR2828240A1 (fr) * 2001-08-03 2003-02-07 Siemens Automotive Hydraulics Dispositif de regulation pour pompe transfert a carburant
WO2004072477A1 (de) * 2003-02-11 2004-08-26 Ganser-Hydromag Ag Hochdruckpumpe

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2343962A (en) * 1941-02-25 1944-03-14 Dodson Edward Measuring pump
US2395330A (en) * 1942-09-11 1946-02-19 Dayton Liquid Meter Co Oil circulatory system employed in fuel injection pumps
US2410947A (en) * 1943-04-19 1946-11-12 Caterpillar Tractor Co Fuel injection pum mechanism
US2440194A (en) * 1946-01-29 1948-04-20 Texas Co Fuel pump
US2897808A (en) * 1956-07-31 1959-08-04 Bendix Aviat Corp Fuel injection system
US4008009A (en) * 1975-09-30 1977-02-15 Endre Kovacs Fuel injection pump
DE2853130A1 (de) * 1978-12-08 1980-06-19 Luk Lamellen & Kupplungsbau Einrichtung zum starten einer brennkraftmaschine
JPH0587009A (ja) * 1991-09-30 1993-04-06 Yamaha Motor Co Ltd デイーゼルエンジン
JPH07269444A (ja) * 1994-03-29 1995-10-17 Yamaha Motor Co Ltd 高圧燃料ポンプ
JPH1122648A (ja) * 1997-07-04 1999-01-26 Nissan Motor Co Ltd 燃料ポンプ
JPH11159446A (ja) * 1997-11-28 1999-06-15 Nissan Motor Co Ltd 油圧介在式ポンプ
JPH11324861A (ja) * 1998-05-19 1999-11-26 Mitsubishi Electric Corp 燃料噴射ポンプ
JP3758480B2 (ja) * 2000-08-25 2006-03-22 国産電機株式会社 ダイヤフラムポンプ
JP4090382B2 (ja) * 2003-04-21 2008-05-28 株式会社日立製作所 筒内噴射式内燃機関の燃料供給装置
JP2006118448A (ja) * 2004-10-22 2006-05-11 Denso Corp 燃料噴射ポンプ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19955298A1 (de) * 1998-11-19 2000-05-25 Luk Fahrzeug Hydraulik Fördereinrichtung für einen Kraftstoff
FR2826068A1 (fr) * 2001-06-19 2002-12-20 Siemens Automotive Hydraulics Dispositif de regulation de debit pour pompe transfert a carburant
FR2828240A1 (fr) * 2001-08-03 2003-02-07 Siemens Automotive Hydraulics Dispositif de regulation pour pompe transfert a carburant
WO2004072477A1 (de) * 2003-02-11 2004-08-26 Ganser-Hydromag Ag Hochdruckpumpe

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010060761A1 (de) * 2008-11-25 2010-06-03 Schaeffler Kg Rollenstössel
FR2961561A1 (fr) * 2010-06-22 2011-12-23 Bosch Gmbh Robert Pompe a piston
WO2018146340A1 (en) * 2017-02-13 2018-08-16 Delphi Technologies Ip Limited Damper
FR3105207A1 (fr) 2019-12-23 2021-06-25 Syctom L'agence Metropolitaine Des Dechets Menagers Dispositif d’injection sous haute pression d’un mélange humide
FR3105252A1 (fr) 2019-12-23 2021-06-25 Syctom L'agence Metropolitaine Des Dechets Menagers Dispositif d’injection sous haute pression d’une ressource organique
WO2021130444A1 (fr) 2019-12-23 2021-07-01 Syctom L'agence Metropolitaine Des Dechets Menagers Dispositif d'injection sous haute pression d'un mélange humide
WO2021130445A1 (fr) 2019-12-23 2021-07-01 Syctom L'agence Metropolitaine Des Dechets Menagers Dispositif d'injection sous haute pression d'une ressource organique
FR3112089A1 (fr) 2020-07-02 2022-01-07 Commissariat A L'energie Atomique Et Aux Energies Alternatives Dispositif d’injection sous haute pression d’un effluent

Also Published As

Publication number Publication date
EP1884656B1 (de) 2009-11-25
US20080175731A1 (en) 2008-07-24
DE602007003414D1 (de) 2010-01-07
ATE449905T1 (de) 2009-12-15
FR2904665A1 (fr) 2008-02-08
FR2904665B1 (fr) 2008-10-31
KR20080012799A (ko) 2008-02-12
JP2008038909A (ja) 2008-02-21

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