EP1114252A1 - Connection and housing for a fuel injection system with a high-pressure fuel accumulator - Google Patents
Connection and housing for a fuel injection system with a high-pressure fuel accumulatorInfo
- Publication number
- EP1114252A1 EP1114252A1 EP00943620A EP00943620A EP1114252A1 EP 1114252 A1 EP1114252 A1 EP 1114252A1 EP 00943620 A EP00943620 A EP 00943620A EP 00943620 A EP00943620 A EP 00943620A EP 1114252 A1 EP1114252 A1 EP 1114252A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- clamping element
- connecting piece
- connection
- hole
- 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
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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
-
- 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
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
- F02M55/025—Common rails
-
- 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
Definitions
- the invention relates to a connecting piece according to the preamble of claim 1 and a housing, in particular a high-pressure fuel accumulator with a welded-on connecting piece according to the preamble of claim 4 for a fuel injection system for internal combustion engines.
- Fuel injection systems such as high-pressure fuel pumps, high-pressure fuel accumulators and injection nozzles, are usually connected to one another by hydraulic lines. These connections are often sealed with the aid of a clamping nut which is pushed over the hydraulic line and which is connected in a liquid-tight manner to the housing of the corresponding assembly
- connection piece is screwed.
- the high-pressure fuel accumulator has a large number of such connecting pieces, which, for example, enable the fuel supply and fuel outflow into and out of the accumulator.
- connection pieces which attach to the housing be welded on.
- a disadvantage of the known welded structures is that the weld seam has two functions. First, it must establish the connection between the housing and the connecting piece and transfer all forces. Especially with modern ones
- Fuel injection systems result from the high swelling pressures and high swelling tensile stresses in the weld seam.
- a further disadvantage of the known welded constructions is that during the welding process, spatter or weld deposits can reach the high-pressure area of the line or the fuel accumulator, which can lead to malfunctions in the fuel injection system.
- the present invention has for its object to provide a connection piece and a housing and a connection piece connected to it, which securely seal the high pressure area of the housing and the connection piece from the environment and in which the high pressure area reliably against particles that can arise when connecting the two components is protected.
- a connecting piece for a fuel injection system for internal combustion engines with a through hole running in the direction of the longitudinal axis, with a first end at which a concentric to the through hole is arranged
- Clamping element which has a through hole and a cylindrical sealing surface.
- the clamping element takes over with its cylindrical sealing surface
- connection with a suitably designed housing Sealing the fuel in the through hole from the environment. Due to the spatial separation of the functions "holding” and “sealing" of the connection piece, both the sealing surface and the connection of the connection piece and housing can be optimally designed.
- the sealing surface prevents welding spatter or chips that occur when connecting the connection piece and housing from getting into the high-pressure area of the connection piece or housing.
- One embodiment provides that the connecting piece and the tensioning element are made in one piece, so that the number of components is minimized.
- the connecting piece and the tensioning element are separate components, so that both components can be optimized separately with regard to shape, material and manufacturing process.
- the sealing surface has the shape of an outer cylinder, so that the operating pressure of the fuel expands the sealing surface outwards and thus increases the surface pressure between the sealing surface of the connecting piece and the housing.
- Another variant provides that at least one groove for receiving a sealing ring is present in the tensioning element.
- a housing in particular a high-pressure fuel accumulator, for a fuel injection system for internal combustion engines with a connecting piece which has a through-hole and is connected to the housing in a liquid-tight manner, the inside of the housing and the through-hole being connected by a Bore in the housing are hydraulically connected, the means for connecting the housing and connecting piece and the means for sealing the connection of the housing and connecting piece being arranged spatially separated.
- An embodiment of the invention provides that a cylindrical clamping element is arranged concentrically to the through-hole at a first end of the connecting piece, the clamping element having a through-hole that the hole has a recess at its end facing the connecting piece, which forms an interference fit with the clamping element ,
- Connection piece and the bore of the housing against the environment and thus forms the sealing surface. Due to the surface pressure between the clamping element and the recess in the housing, a good sealing effect is achieved.
- a countersink is arranged concentrically to the through-hole at a first end of the connecting piece, that the bore of the housing has a recess at its end facing the connecting piece, and that There is a cylindrical clamping element between the connecting piece and the housing, which forms press fits with the lowering of the connecting piece and the recess of the housing:, so that the connecting piece, clamping element and housing can be made from different materials that are optimally adapted to the respective requirements and thus improve operational safety becomes.
- Clamping element in the form of an outer cylinder, so that the operating pressure of the fuel expands the sealing surface of the clamping element to the outside.
- the surface pressure between the sealing surface of the connecting piece and that of the recess in the housing is increased, which additionally increases the tightness of the connection.
- At least one groove for receiving a is in the clamping element
- Sealing rings available, so that the tightness is further increased by the sealing ring.
- grooves are provided in the recess of the housing and the lowering of the connecting piece
- sealing ring there is at least one sealing ring each, so that the clamping element can be dimensioned to be particularly small, since the sealing rings take on part of the "sealing" function and the clamping element is not weakened by grooves for receiving a sealing ring.
- the connecting piece and the housing are connected by welding.
- This housing has the advantages of the known welded structures, such as simple and inexpensive manufacture, without the disadvantages to have.
- the pretensioning of the clamping element there is a permanent pretension between the sealing surfaces of the connection piece and the housing after the welding has taken place.
- the spatial separation of the sealing surface and the weld seam prevents the penetration of welding spatter into the high-pressure area of the housing or connection piece.
- the notch effect on the weld seam possibly caused by the fuel under operating pressure is eliminated.
- FIG. 1 shows a first embodiment of a connecting piece according to the invention and a high-pressure fuel accumulator
- connection piece according to the invention shows a second embodiment of a connection piece according to the invention and a high-pressure fuel accumulator; such as
- Fig. 3 shows a third embodiment of a connecting piece according to the invention and a high-pressure fuel accumulator with sealing rings.
- connection piece 1 shows a first embodiment of a connecting piece 1 according to the invention.
- the Connection piece 1 is with a
- High-pressure fuel reservoir 2 connected by a circumferential weld seam 3.
- the high-pressure fuel reservoir 2 has a bore 4, which is connected to a through bore 5 of the connecting piece 1 and the interior 6 of the high-pressure fuel reservoir 2.
- this collar 7 acts as a stop in the direction of the longitudinal axis of the connecting piece 1 when it is seated on a corresponding annular surface 8 of the high-pressure fuel accumulator 2. The position of the connecting piece 1 in the axial direction with respect to the high-pressure fuel accumulator 2 can thus be determined during welding.
- a high-pressure fuel reservoir " 2 protrudes into the connection piece 1.
- the tension element 10 forms an interference fit with the recess 9 of the high-pressure fuel store 2 and thus seals the connection between the high-pressure fuel store 2 and the connection port 1 from the environment.
- the sealing surface is thus formed by the press fit between the connection port 1 and high-pressure fuel accumulator 2 formed.
- FIG. 1 shows a line (not shown) at the end of the connecting piece 1 facing away from the high-pressure fuel accumulator 2.
- a line (not shown) is usually fastened by means of a union nut (also not shown).
- 2 shows a second embodiment of a connecting piece 1 according to the invention.
- the reference numbers used correspond to those in FIG. 1.
- the connecting piece 1 has a cylindrical countersink 13 into which the clamping element 10, which is designed as a separate component, projects.
- the clamping element 10 forms with the depression 9 of the high-pressure fuel reservoir 2 and the countersink 13 press fits. Due to the fact that the tensioning element 10 is designed as a separate component, it can be optimized with regard to the material and the production method independently of the connecting piece 1 and the high-pressure fuel reservoir 2.
- the diameter of the depression 13 and the recess 9 need not be the same, as shown here. In this embodiment, too
- FIG. 3 On the right side of FIG. 3, an embodiment is shown according to FIG. 1 with the difference that the clamping element 10 has a groove 14 in which a sealing ring 15 is located.
- FIG. 2 An embodiment with a separate clamping element 10 according to FIG. 2 is shown on the left-hand side of FIG. 3, in which the clamping element 10 has two grooves 14 and two sealing rings 15.
- the grooves 14 can also be made in the depression 13 and the depression 9.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19933254A DE19933254A1 (en) | 1999-07-15 | 1999-07-15 | Connection piece and housing, in particular high-pressure fuel accumulator, with prestressed welded connection piece for a fuel injection system for internal combustion engines |
DE19933254 | 1999-07-15 | ||
PCT/DE2000/001620 WO2001006116A1 (en) | 1999-07-15 | 2000-05-19 | Connection and housing for a fuel injection system with a high-pressure fuel accumulator |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1114252A1 true EP1114252A1 (en) | 2001-07-11 |
EP1114252B1 EP1114252B1 (en) | 2007-04-18 |
Family
ID=7914932
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00943620A Expired - Lifetime EP1114252B1 (en) | 1999-07-15 | 2000-05-19 | High pressure fuel accumulator with prestressed welded connecting socket for a fuel injection system of internal combustion engines |
Country Status (7)
Country | Link |
---|---|
US (1) | US6513498B1 (en) |
EP (1) | EP1114252B1 (en) |
JP (1) | JP2003504561A (en) |
KR (1) | KR100691206B1 (en) |
CN (1) | CN1183323C (en) |
DE (2) | DE19933254A1 (en) |
WO (1) | WO2001006116A1 (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10140057B4 (en) * | 2001-08-16 | 2007-08-30 | Robert Bosch Gmbh | High-pressure fuel storage |
EP1298313A3 (en) * | 2001-10-01 | 2004-12-01 | Siemens Aktiengesellschaft | Fuel accumulator for a fuel injection device |
DE10162203A1 (en) * | 2001-12-18 | 2003-07-10 | Bosch Gmbh Robert | High pressure fuel store has high pressure connections with holding elements fixed to store at two or more connecting points |
JP4007590B2 (en) * | 2002-12-11 | 2007-11-14 | 臼井国際産業株式会社 | High pressure fuel injection pipe with connecting head |
DE10333721B4 (en) * | 2003-07-23 | 2005-07-07 | Benteler Automobiltechnik Gmbh | Fuel rail with a connection piece |
DE102004055266A1 (en) * | 2004-11-17 | 2006-05-18 | Robert Bosch Gmbh | Fuel injection system with multiple accumulators |
EP1914418B1 (en) | 2005-08-04 | 2012-01-25 | Nippon Steel Corporation | High-pressure fuel injection accumulator distributor for automobile and method of manufacturing the same |
JP4372064B2 (en) * | 2005-08-04 | 2009-11-25 | 新日本製鐵株式会社 | High pressure fuel injection accumulator / distributor for automobile and manufacturing method thereof |
DE102007018471A1 (en) * | 2007-04-19 | 2008-10-23 | Robert Bosch Gmbh | Intersection between a high pressure chamber and a high pressure channel |
DE102008013575B3 (en) * | 2008-03-11 | 2009-08-13 | Poppe & Potthoff Gmbh | Fuel rail assembly |
DE102012005921A1 (en) * | 2012-03-26 | 2013-09-26 | Poppe & Potthoff Gmbh & Co | Welded component assembly has sealing component that is sealingly attached on outer surface of tubular body and outer surface of connection fitting, such that no particles released from weld seam enter into space outside sealing component |
DE202013103710U1 (en) * | 2013-08-15 | 2013-08-29 | Ti Automotive (Heidelberg) Gmbh | Fuel rail |
JP6406904B2 (en) * | 2014-07-16 | 2018-10-17 | 臼井国際産業株式会社 | Terminal seal structure of fuel rail for gasoline direct injection engine |
US20170350321A1 (en) * | 2016-06-02 | 2017-12-07 | General Electric Company | Bundled Tube Fuel Nozzle Assembly with Tube Extensions |
JP2019138240A (en) * | 2018-02-13 | 2019-08-22 | トヨタ自動車株式会社 | Fuel pipe |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2015246A (en) * | 1933-12-26 | 1935-09-24 | Taylor Edward Hall | Welding outlet |
DE1937444C3 (en) | 1969-07-23 | 1974-03-21 | Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 7990 Friedrichshafen | Fuel line connections that can be produced by plug connections on a pump nozzle unit provided for each cylinder of an internal combustion engine |
IT1219300B (en) * | 1988-05-13 | 1990-05-03 | Weber Srl | PROCEDURE FOR THE CONSTRUCTION OF A FUEL MANIFOLD FOR A FUEL SUPPLY SYSTEM OF AN INTERNAL COMBUSTION ENGINE |
JPH0754616Y2 (en) * | 1989-05-06 | 1995-12-18 | 臼井国際産業株式会社 | Fuel delivery pipe |
US5172939A (en) * | 1989-10-14 | 1992-12-22 | Usui Kokusai Sangyo Kaisha Ltd. | Connection structure for branch pipe in high-pressure fuel rail |
DE9302824U1 (en) * | 1993-02-26 | 1993-04-15 | Technoflow Tube-Systems Gmbh, 3501 Fuldabrueck, De | |
DE4404861A1 (en) * | 1994-02-16 | 1995-08-17 | Alusuisse Lonza Services Ag | Component with extruded profile |
DE19523287C2 (en) * | 1994-06-28 | 1998-07-02 | Usui Kokusai Sangyo Kk | Arrangement for connecting a fuel branch element to a fuel busbar |
US5887910A (en) * | 1994-12-08 | 1999-03-30 | Usui Kokusai Sangyo Kaisha Limited | Connection structure for branching connector in high-pressure fuel rail |
DE19607521C1 (en) * | 1996-02-28 | 1997-04-10 | Juergen Dipl Ing Guido | High-pressure fuel pipe, for diesel engine with common-rail system |
DE19744762A1 (en) | 1997-03-18 | 1998-10-01 | Poppe & Potthoff Gmbh & Co | Injection device for a diesel engine |
FR2762050B1 (en) * | 1997-04-10 | 1999-06-18 | Cideb | FUEL DISTRIBUTION DEVICE FOR SUPPLYING THE CYLINDERS OF AN INTERNAL COMBUSTION ENGINE |
DE19729392C2 (en) * | 1997-07-09 | 1999-05-06 | Siemens Ag | Fuel storage with seal |
-
1999
- 1999-07-15 DE DE19933254A patent/DE19933254A1/en not_active Ceased
-
2000
- 2000-05-19 EP EP00943620A patent/EP1114252B1/en not_active Expired - Lifetime
- 2000-05-19 JP JP2001510723A patent/JP2003504561A/en active Pending
- 2000-05-19 WO PCT/DE2000/001620 patent/WO2001006116A1/en active IP Right Grant
- 2000-05-19 DE DE50014262T patent/DE50014262D1/en not_active Expired - Fee Related
- 2000-05-19 KR KR1020017003261A patent/KR100691206B1/en not_active IP Right Cessation
- 2000-05-19 CN CNB008013403A patent/CN1183323C/en not_active Expired - Fee Related
- 2000-05-19 US US09/787,255 patent/US6513498B1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO0106116A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN1183323C (en) | 2005-01-05 |
EP1114252B1 (en) | 2007-04-18 |
KR20010073160A (en) | 2001-07-31 |
DE50014262D1 (en) | 2007-05-31 |
DE19933254A1 (en) | 2001-01-25 |
KR100691206B1 (en) | 2007-03-08 |
US6513498B1 (en) | 2003-02-04 |
CN1317071A (en) | 2001-10-10 |
WO2001006116A1 (en) | 2001-01-25 |
JP2003504561A (en) | 2003-02-04 |
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