EP1225328A2 - Système à haute pression de carburant pour un moteur à combustion - Google Patents

Système à haute pression de carburant pour un moteur à combustion Download PDF

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Publication number
EP1225328A2
EP1225328A2 EP01130777A EP01130777A EP1225328A2 EP 1225328 A2 EP1225328 A2 EP 1225328A2 EP 01130777 A EP01130777 A EP 01130777A EP 01130777 A EP01130777 A EP 01130777A EP 1225328 A2 EP1225328 A2 EP 1225328A2
Authority
EP
European Patent Office
Prior art keywords
pressure
contact surface
ring
fuel system
pressure fuel
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Withdrawn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
EP01130777A
Other languages
German (de)
English (en)
Other versions
EP1225328A3 (fr
Inventor
Otto Krickau
Laslo Roza
Siegfried Ruthardt
Hrvoje Lalic
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
Original Assignee
Robert Bosch GmbH
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 filed Critical Robert Bosch GmbH
Publication of EP1225328A2 publication Critical patent/EP1225328A2/fr
Publication of EP1225328A3 publication Critical patent/EP1225328A3/fr
Withdrawn legal-status Critical Current

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    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings
    • F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
    • 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
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • 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
    • F02M2200/8069—Fuel injection apparatus manufacture, repair or assembly involving removal of material from the fuel apparatus, e.g. by punching, hydro-erosion or mechanical operation

Definitions

  • the invention relates to a high-pressure fuel system for Internal combustion engines according to the preamble of claim 1 out.
  • Such high-pressure fuel systems are, for example known from Japanese Patent JP 08-270530, in which is shown a high pressure system, part of a Fuel injection pump is.
  • a high pressure system part of a Fuel injection pump is.
  • the end faces of the ring lands are as sealing surfaces trained that are small compared to the whole Contact surface so that when the high pressure body is clamped against each other a high surface pressure on the sealing surface occurs, resulting in better sealing of the high pressure duct allowed.
  • the ring bars can vary in height and width become.
  • the high-pressure fuel system with the characteristic Features of claim 1, however, points the advantage that the passage of the high pressure channel surrounding ring web has flanks that match the normal the end face of the Ring web encloses an angle that is greater than 0 °. As a result, the pressure increases in the area of the edges, that at the transition from the flanks of the ring land to the sealing surface are formed, reduced and the ring web a total conferred greater stability.
  • the contact surfaces more than one ring web on the contact surfaces intended. This also results in the event that one of the two ring bars due to assembly errors or in operation should leak, an emergency sealing property that in this case, the high-pressure fuel system continues to operate allows.
  • the invention is the transition from the contact surface to Flank of the ring land rounded with a radius of curvature.
  • a high-pressure body can be any component that has a channel or a cavity in its interior in which fuel can be filled under high pressure.
  • a high-pressure duct 17 runs in the first high-pressure body 1 and passes through a first contact surface 10 of the first high-pressure body 1.
  • a second high-pressure body 3 is arranged opposite the first high-pressure body 1 and has a second contact surface 12 which lies opposite the first contact surface 10. The high pressure channel 17 continues in the second high pressure body 3, so that it leads from the first high pressure body 1 through the first contact surface 10 and the second contact surface 12 into the second high pressure body 3.
  • annular web 5 is formed which surrounds the passage of the high-pressure channel 17 and which has an at least approximately trapezoidal cross section.
  • the end face of the ring web 5 facing the first contact surface 10 is designed as a sealing surface 15 and lies flat against the first contact surface 10, the sealing surface 15 having a width b.
  • the first high-pressure body 1 and the second high-pressure body 3 are pressed against one another in the direction of the normal to the sealing surface 15 by a tensioning device, not shown in the drawing. As a result, the annular web 5 is pressed into the first contact surface 10, it being possible to achieve a high contact pressure p G due to the small area of the sealing surface 15 compared to the entire contact surface 10.
  • the ring web 5 has a height h which can be varied depending on the requirements of the respective high-pressure fuel system.
  • the height h can be a few tenths of a millimeter up to 10 millimeters.
  • the width b of the sealing surface 15 can also be varied in the range from a few tenths of a millimeter to a few millimeters.
  • this transition is rounded with a radius of curvature R.
  • the ring web 5 has an inner flank 7, which is the transition forms the contact surface 12 to the sealing surface 15 and at least is essentially conical.
  • the inner one Flank 7 surrounds the high pressure channel 17 and is fuel acted upon in the high pressure channel 17. Accordingly, on Transition of the sealing surface 15 to the contact surface 12 an outer Flank 9 formed, which is also essentially a conical Has shape.
  • the inner flank 7 closes with the Normals of the sealing surface 15 an angle ⁇ and the outer Edge 9 an angle ⁇ .
  • These angles ⁇ , ⁇ can be relative be small, as shown in Figure 1, or almost 90 °.
  • the exact design of the angles ⁇ , ⁇ depends of the required sealing effect and the other Installation conditions in the high-pressure fuel system.
  • the Angle ⁇ of the outer flank 9 can be the same or also be different from the angle ⁇ of the inner flank 7.
  • FIG 2 is another embodiment of the invention High pressure fuel system shown.
  • annular web 105 is also formed on the second contact surface 12, where both ring webs 5,105 the same or also can have a different cross section.
  • a sealing surface 115 is formed, which is ground flat and on the sealing surface 15 of the ring land 5 is present. Due to the contact pressure F, the two Sealing surfaces 15 pressed together and thus seal the high pressure channel 17 from without pressing in between Sealing surface 15 and flank 9 or 7 formed a sealing edge excessive notch tension must be feared.
  • the web height h, the Bridge width b and the angle ⁇ - depending on the requirements of the Sealing effect - vary and adapt.
  • FIG. 3 shows a further exemplary embodiment of the high-pressure fuel system according to the invention.
  • An annular web 5 is arranged both on the first high-pressure body 1 and an annular web 105 on the second high-pressure body 3.
  • the two ring webs 5, 105 have a different diameter, the diameter D 1 of the ring web 5 being larger than the diameter D 2 of the ring web 105.
  • the sealing surfaces 15, 115 of the two ring webs 5, 105 are therefore not in contact with one another but on the respective contact surface 10, 12 the high pressure body 1.3.
  • the height h of the ring webs 5, 105 must be identical so that a sufficient sealing effect is achieved on both sealing surfaces 15, 115.
  • the sealing surface 15 of the ring web 5 is also delimited here by the inner flank 7 and the outer flank 9, correspondingly the sealing surface 115 by the inner flank 107 and the outer flank 109.
  • FIG 4 is another embodiment of the invention High pressure fuel system shown here only a high-pressure body 4 cut longitudinally in a perspective Representation is shown.
  • To the passage of the High pressure channel 17 are two in this embodiment concentric ring webs 5 arranged on the contact surface 13, where both ring webs 5 have the same web height h. hereby two ring-shaped sealing surfaces 15 are formed, which when tightening the high pressure body 4 against one another high-pressure body in the contact surface of the further High pressure body are pressed.
  • Ring bars 5,105 can be provided, further ring bars 5 to arrange the passage of the high pressure duct 17, see above that three or more circular ring webs 5 are arranged concentrically are.
  • FIG. 5 is a fuel injection valve for internal combustion engines shown in longitudinal section. It is here as an example for the use of the ring bars and serve their sealing properties.
  • a valve holding body 20 is with the interposition of an washer 22 in the axial Direction by means of a clamping nut 25 against a valve body 24 clamped, the valve holding body 20, the washer 22 and the valve body 24 as a high pressure body are trained.
  • a bore 26 is in the valve body 24 formed in which a piston-shaped valve member 27 is longitudinally displaceable is arranged.
  • the valve member 27 is in one Section of the bore 26 facing away from the combustion chamber in a sealing manner and goes in at its section facing away from the combustion chamber a spring plate 31, which is arranged in the intermediate plate 22 and is formed in a valve holding body 20 Spring chamber 30 protrudes.
  • Spring chamber 30 is one Closing spring 32 arranged under bias that the valve member 27 with one at the combustion chamber end of the valve member 27 formed valve sealing surface 33 against a Combustion chamber end of the bore 26 formed valve seat 34 presses.
  • a pressure chamber 37 is formed in the valve body 24, which Valve member 27 surrounds up to the valve seat 34 as an annular channel.
  • the valve member 27 moved in the axial direction away from the valve seat 34, where the hydraulic force on one on the valve member 27 trained pressure shoulder 29 is larger than that Force of the closing spring 32.
  • at least one Injection port 28 is released downstream of the valve seat 34 arranged at the combustion chamber end of the bore 26 is.
  • the pressure chamber 37 is in the valve body 24, the intermediate disc 22 and the valve holding body 20 extending Inlet channel 35 with one in the drawing is not High pressure fuel source shown connected.
  • the inlet channel 35 through the respective contact surfaces.
  • FIG 6 is an enlarged view of the inlet channel 35 shown in the area of the intermediate plate 22.
  • On the contact surface 122 is a ring web surrounding the inlet channel 35 5, which has an annular disk-shaped sealing surface 15 has by the clamping nut 25 against the contact surface 120 of the valve holding body 20 is pressed.
  • the outer Flank 9 of the ring land 5 is here, as in the examples in Figures 1 to 3, beveled.
  • the inner edge 7 of the Ring web 5 follows the course of the inlet channel 35, so that in Course of the inlet channel 35 at the transition of the valve holding body 20 to the washer 22 no ring shoulder formed becomes.
  • the transition of the washer 22 to the valve body 24 is designed the same way as the transition of the intermediate disc 22 to Valve holding body 20.
  • the ring web 5, which the inlet channel 35 surrounds, is here on the contact surface 124 of the valve body 24 arranged. It can also in this embodiment be provided, more than one ring web 5 concentrically to arrange the inlet channel 35. Here it can also be provided to arrange more than two ring webs 5, if, for example, the rest of the contact surface is supported should.
  • Both injectors in particular, must have high pressure bodies be made of steel to ensure a good seal of the Reaching ring bridges. Because of the high dynamic loads, as with the presses that change frequently during operation arise in the high pressure duct, the used Steels have a certain hardness. For this application a hardness of around 20 to 60 HRC (Rockwell hardness) proven to be cheap.
  • the ring webs 5,105 shown in the drawing it can also be provided for a non-circular Passage point of the high-pressure channel, the ring web 5 to the Adjust the contour of the high pressure channel so that it, for example is designed as a polygon or an oval shape has, the cross section as in the in the Drawings shown and described above embodiments can be varied.
  • Ring bars 5,105 also around each other's passage Cavity arranged in a high pressure fuel system be in which fuel is under high pressure.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP01130777A 2001-01-19 2001-12-22 Système à haute pression de carburant pour un moteur à combustion Withdrawn EP1225328A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10102233 2001-01-19
DE2001102233 DE10102233A1 (de) 2001-01-19 2001-01-19 Kraftstoffhochdrucksystem für Brennkraftmaschinen

Publications (2)

Publication Number Publication Date
EP1225328A2 true EP1225328A2 (fr) 2002-07-24
EP1225328A3 EP1225328A3 (fr) 2004-01-07

Family

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Family Applications (1)

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EP01130777A Withdrawn EP1225328A3 (fr) 2001-01-19 2001-12-22 Système à haute pression de carburant pour un moteur à combustion

Country Status (2)

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EP (1) EP1225328A3 (fr)
DE (1) DE10102233A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1236886A3 (fr) * 2001-02-14 2004-01-02 Denso Corporation Dispositif pour augmenter la pression de contact entre des conduites pour fluide
WO2004055358A1 (fr) * 2002-12-16 2004-07-01 L'orange Gmbh Dispositif comprenant un plan d'etancheite situe entre deux corps
EP1340907A3 (fr) * 2002-03-01 2005-01-05 Robert Bosch Gmbh Procédé de fabrication d'une soupape d'injection de carburant
WO2005113977A1 (fr) * 2004-05-17 2005-12-01 Siemens Aktiengesellschaft Injecteur pour moteurs a combustion interne
WO2005119047A1 (fr) * 2004-06-03 2005-12-15 Bosch Corporation Soupape d’injection de carburant
WO2005119046A1 (fr) * 2004-06-03 2005-12-15 Bosch Corporation Soupape d’injection de carburant
US7415920B2 (en) 2003-03-07 2008-08-26 Siemens Aktiengesellschaft Radial piston pump
WO2008104421A1 (fr) * 2007-02-26 2008-09-04 Robert Bosch Gmbh Mise à nu de surface pour injecteurs de carburant
EP1820957A3 (fr) * 2006-02-20 2009-03-25 Robert Bosch Gmbh Injecteur de carburant pour moteurs à combustion interne
DE102006000035B4 (de) * 2005-01-31 2018-11-08 Denso Corporation Fluideinspritzventil

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009016271A1 (de) * 2009-04-03 2010-10-07 Continental Automotive Gmbh Injektor zum Einspritzen von Kraftstoff in eine Brennkraftmaschine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08270530A (ja) 1995-03-30 1996-10-15 Zexel Corp 燃料噴射ポンプにおけるデリバリバルブシートのシート構造

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE952482C (de) * 1954-01-24 1956-11-15 Gerhard Bilek Hartdichtung ohne Verwendung von Packungen
DE1004002B (de) * 1955-03-30 1957-03-07 Gerhard Bilek Zwischendichtungslose Abdichtung
CH389344A (de) * 1959-08-28 1965-03-15 Dilo Ges Drexler & Co Hartdichtung
US6123339A (en) * 1997-05-20 2000-09-26 Daiso Corporation Non-gasket sealing structure

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08270530A (ja) 1995-03-30 1996-10-15 Zexel Corp 燃料噴射ポンプにおけるデリバリバルブシートのシート構造

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1236886A3 (fr) * 2001-02-14 2004-01-02 Denso Corporation Dispositif pour augmenter la pression de contact entre des conduites pour fluide
EP1340907A3 (fr) * 2002-03-01 2005-01-05 Robert Bosch Gmbh Procédé de fabrication d'une soupape d'injection de carburant
WO2004055358A1 (fr) * 2002-12-16 2004-07-01 L'orange Gmbh Dispositif comprenant un plan d'etancheite situe entre deux corps
US7415920B2 (en) 2003-03-07 2008-08-26 Siemens Aktiengesellschaft Radial piston pump
WO2005113977A1 (fr) * 2004-05-17 2005-12-01 Siemens Aktiengesellschaft Injecteur pour moteurs a combustion interne
WO2005119047A1 (fr) * 2004-06-03 2005-12-15 Bosch Corporation Soupape d’injection de carburant
WO2005119046A1 (fr) * 2004-06-03 2005-12-15 Bosch Corporation Soupape d’injection de carburant
DE102006000035B4 (de) * 2005-01-31 2018-11-08 Denso Corporation Fluideinspritzventil
EP1820957A3 (fr) * 2006-02-20 2009-03-25 Robert Bosch Gmbh Injecteur de carburant pour moteurs à combustion interne
WO2008104421A1 (fr) * 2007-02-26 2008-09-04 Robert Bosch Gmbh Mise à nu de surface pour injecteurs de carburant

Also Published As

Publication number Publication date
DE10102233A1 (de) 2002-07-25
EP1225328A3 (fr) 2004-01-07

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