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EP2809941B1 - Rampe distributrice de carburant - Google Patents

Rampe distributrice de carburant Download PDF

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Publication number
EP2809941B1
EP2809941B1 EP13708071.9A EP13708071A EP2809941B1 EP 2809941 B1 EP2809941 B1 EP 2809941B1 EP 13708071 A EP13708071 A EP 13708071A EP 2809941 B1 EP2809941 B1 EP 2809941B1
Authority
EP
European Patent Office
Prior art keywords
plug
fuel rail
fuel distributor
distributor pipe
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.)
Active
Application number
EP13708071.9A
Other languages
German (de)
English (en)
Other versions
EP2809941A1 (fr
Inventor
Friedrich Schulte
Damian Zwiener
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.)
Benteler Automobiltechnik GmbH
Original Assignee
Benteler Automobiltechnik 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 Benteler Automobiltechnik GmbH filed Critical Benteler Automobiltechnik GmbH
Publication of EP2809941A1 publication Critical patent/EP2809941A1/fr
Application granted granted Critical
Publication of EP2809941B1 publication Critical patent/EP2809941B1/fr
Active 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F02M63/0275—Arrangement of 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
    • F02M55/02—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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails

Definitions

  • the invention relates to a tubular fuel rail, the end is closed with a plug which is inserted into the fuel rail and soldered to it.
  • the distribution of fuel to individual cylinders of an internal combustion engine is usually carried out by a tubular fuel rail, which is arranged in the vicinity of a cylinder head and is secured by means of retaining elements thereto. In the same distance as the cylinder openings are arranged on the fuel rail, in which injectors are used, which inject the fuel into the combustion chamber of the respective cylinder. At the end, the fuel rail is closed with plugs. Either the fuel feed is integrated into one of these plugs in the fuel rail or the fuel inlet takes place at another point of the fuel rail.
  • fuel is either gasoline or diesel.
  • direct injection into the combustion chamber of the respective cylinder is carried out both in diesel engines and in modern gasoline engines.
  • the operating pressures in the fuel rail differ considerably between diesel and gasoline.
  • the necessary pressure for diesel direct injection is relatively high. In a so-called common rail technology, it is about 1800 bar and rises up to 2500 bar in a so-called pump-nozzle technology.
  • the usual working pressures are around 1 to 100 bar.
  • the fuel rail must be designed for an operating pressure of 200 to 800 bar. This results in design differences in the fuel rail, depending on whether the fuel rail for a diesel engine, a gasoline engine or a gasoline engine with modern direct injection is used at relatively high pressure.
  • the DE 10 2009 029 219 A1 shows a fuel rail for a diesel engine. It is a massive fuel rail, in which all connections for the injectors are integrally formed. At the end, plugs are screwed into the fuel rail via a thread.
  • the wall thickness of the fuel rail is so strong that both a pipe wall of the fuel rail at the end inside is provided with a recess and the plug is in engagement with the recess and in the pipe wall with the return thread is introduced.
  • a similar structure of a fuel rail for diesel internal combustion engines shows the DE 101 62 203 A1 ,
  • a pipe wall of the fuel rail is provided at the inside end with a recess and a thread into which a plug is screwed.
  • Such strong wall thicknesses are not available for fuel distribution strips for gasoline, since here the entire fuel rail is due to the significantly lower operating pressures of a relatively thin-walled tube.
  • a generic fuel rail for example, from a stainless steel pipe with a wall thickness manufactured under 1 mm.
  • end plugs are soldered to the fuel rail. This design is excluded in a fuel rail for a high pressure diesel application, as it does not withstand the operating pressure of more than 1800 bar.
  • the DE 100 42 540 C1 shows a thin-walled fuel rail, which consists of an inner tube and a surrounding reinforcement.
  • the end of the inner tube is closed on one side with a stopper, on the other side a plug is arranged, in which a connecting cable is inserted.
  • the plugs are inserted into the inner tube and connected to this cohesively.
  • the just shown type is reliable.
  • the joint between plug and fuel rail is loaded with different load cases.
  • the load cases arise from a thrust force, which results from the internal pressure of the fuel on the inner surface of the plug, and from a tensile force in the joint, which is derived from the internal pressure in the tube to the inner surface of the tube. Consequently, the flow of force in the joint is deflected and thus causes increased stresses in the joint.
  • the plug in a particular embodiment on the outer peripheral side on a lying within the fuel rail groove for receiving a solder ring.
  • the approach to the stopper prevents the solder from flowing into the interior of the fuel rail.
  • the solder remains in the region of the groove and the immediately adjacent planar areas of the plug, so that it is ensured that enough solder is available for a cohesive connection of plug and fuel rail.
  • a passage for fuel is formed in the plug, with the passage preferably having at least two diameters of different sizes.
  • the plug on the outer peripheral side has a mark lying outside the fuel rail. Plug and fuel rail are designed for an operating pressure of 200 to 800 bar and are usually used for gasoline fuel.
  • FIG. 1 the fuel distributor strip (1) according to the invention with a pipe wall (2), connection sockets (3) for injectors and holders (4) for fixing to an internal combustion engine in a plan view is shown.
  • the fuel rail (1) with two different plugs (5) and (6) is closed.
  • FIG. 2 shows a longitudinal section through the fuel rail according to the invention (1).
  • a supply of fuel through the passage (12) is possible.
  • an operating pressure of 200 to 800 bar is set in the fuel rail (1).
  • the passage (12) has different diameters, and that reduces the diameter in the direction of the fuel rail (1). This serves to throttle and calm the incoming fuel.
  • a non-illustrated pressure sensor is arranged, which monitors the pressure in the interior of the fuel rail (1).
  • the fuel is supplied via the connection sockets (3) not shown cylinders of the internal combustion engine.
  • both plugs may have a passage for fuel.
  • the plug (5) and the connection to the fuel rail (1) are shown in detail.
  • the plug (5) has a stop (13). Up to this stop (13), the plug (5) is inserted into the fuel rail (1).
  • the plug (5) has at its end a projection (7), which is located in the interior of the fuel rail (1).
  • the fuel rail (1) is in her End region has been processed so that in the pipe wall (2) of the fuel rail (1) has a recess (11) has been introduced. In this recess (11) engages the projection (7) of the plug (5).
  • the approach (7) closes flush with the pipe wall (2).
  • the inner diameter of the plug (5) consequently coincides with the inner diameter of the fuel distributor strip (1) without a recess (11).
  • the plug therefore continues the wall thickness of the fuel rail (1). This moves the joint from a relatively heavily loaded area.
  • the plug (5) is inside the fuel rail (1) on the outer peripheral side a circumferential groove (8) incorporated for a solder ring.
  • a circumferential groove (8) incorporated for a solder ring.
  • the elements essential to the invention are realized in both plugs (5, 6) and at both ends of the fuel rail (1).
  • the plugs (5, 6) are not constructed completely identical, the plug (5) on the outer peripheral side has a marking (9) located outside the fuel distributor strip.
  • the marking (9) serves a robot for distinguishing the two plugs (5) and (6), so that during assembly of the fuel rail (1) no confusion of the plug (5, 6) occurs.
  • a fuel rail according to the invention may also be closed on both sides with identical plugs both with and without passage for fuel.
  • the stress distribution at the joint or in the joint seam is a decisive criterion for the durability of the fuel rail (1).
  • Extensive strength tests have shown that a specific, in the FIGS. 4 and 5 exactly shown length ratio of an inner length L 1 of the approach (7) and an outer length L 2 at the plug (5, 14) should not be exceeded. It shows FIG. 4 the stopper off FIG. 3 increased.
  • the inner length L 1 of the attachment (7) is decisive.
  • L 1 is measured at the inside diameter of the plug (5), from a nose end (15) of the nosepiece (7) to a bottom (16) of the stopper (5).
  • L 2 is measured at the outer length of the plug (5).
  • Plug (5) has a groove (8) which receives a solder ring, not shown.
  • the groove (8) weakens the plug (5).
  • forms for the joint connection a solder surface (17) of the groove (8) to the base end (15) of the projection (7), the supporting connection. The strength of the connection results from this solder surface (17).
  • L 2 is measured from the groove (8) to the end of the neck (15). If one divides the thus determined outer length L 2 of the solder surface (17) on the plug (5) by the inner length L 1 of the projection (7), the ratio should be greater than or equal to 2, ie L 2 : L 1 ⁇ 2.
  • the plug could also be pasted with a solder.
  • a groove for receiving the solder ring is unnecessary.
  • FIG. 5 Such an embodiment is in FIG. 5 shown.
  • a soldering surface (18) extends from the stop (13) to the attachment end (15).
  • L 2 is also measured from the stop (13) to the extension end (15) of the plug (14).
  • L 1 is measured as well as the plug (5) from the approach end (15) to the bottom (16). Again, for an optimal stress ratio in the joint L 2 : L 1 ⁇ 2 applies.
  • D1 is in the FIGS. 3 to 5 the inner diameter of the fuel rail (1) without return (11) and the inner diameter of the plug (5, 6).
  • the inner diameter D1 of the plug (5, 6) in the region of the projection (7) coincides with the inner diameter D1 of the fuel rail (1) without a recess (11).
  • D2 the outer diameter of the projection (7) or the inner diameter of the pipe wall (2) of the fuel rail (1) in the region of the recess (11) is designated.
  • D3 indicates the outer diameter of the fuel rail (1).

Landscapes

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

Claims (8)

  1. Rampe tubulaire distributrice de carburant (1), qui est fermée à chaque extrémité par un bouchon (5, 6) qui est enfoncé dans ladite rampe distributrice de carburant (1) et brasé sur celle-ci,
    caractérisée en ce qu'une paroi de tube (2) de la rampe distributrice de carburant (1) est munie à chaque extrémité, à l'intérieur, d'un épaulement (11) et en ce que le bouchon (5, 6) est en prise avec l'épaulement (11), le bouchon (5, 6) comportant un prolongement (7) sur le côté à introduire dans la rampe distributrice de carburant (1) de telle sorte qu'un diamètre intérieur du bouchon (5, 6) à cet endroit est égal à un diamètre intérieur de la rampe distributrice de carburant (1) sans épaulement (11) et en ce que le prolongement (7) du bouchon (5, 6) ferme en affleurant la paroi de tube (2) de la rampe distributrice de carburant (1).
  2. Rampe tubulaire distributrice de carburant (1) selon l'une des revendications précédentes, caractérisée en ce que le bouchon (5, 6) comporte du côté de sa circonférence extérieure une rainure (8) qui est située à l'intérieur de la rampe distributrice de carburant (1) et qui est destinée à recevoir un anneau à braser.
  3. Rampe tubulaire distributrice de carburant (1) selon l'une des revendications précédentes, caractérisée en ce qu'une longueur extérieure L2 au niveau du bouchon (5, 14) est dans un rapport de L2/L1 ≥ 2 avec une longueur intérieure L1 au niveau du prolongement du bouchon (5).
  4. Rampe tubulaire distributrice de carburant (1) selon l'une des revendications précédentes, caractérisée en ce qu'un passage (12) pour du carburant est prévu dans le bouchon (6).
  5. Rampe tubulaire distributrice de carburant (1) selon l'une des revendications précédentes, caractérisée en ce que le passage (12) a au moins deux diamètres de dimension différente.
  6. Rampe tubulaire distributrice de carburant (1) selon l'une des revendications précédentes, caractérisée en ce que le bouchon (5) comporte du côté de sa circonférence extérieure un repère (9) situé à l'extérieur de la rampe distributrice de carburant (1).
  7. Rampe tubulaire distributrice de carburant (1) selon l'une des revendications précédentes, caractérisée en ce que le bouchon (5, 6) et la rampe distributrice de carburant (1) sont conçus pour une pression de fonctionnement de 200 à 800 bar.
  8. Rampe tubulaire distributrice de carburant (1) selon l'une des revendications précédentes, caractérisée en ce que le carburant est de l'essence.
EP13708071.9A 2012-02-02 2013-01-31 Rampe distributrice de carburant Active EP2809941B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012001926A DE102012001926A1 (de) 2012-02-02 2012-02-02 Kraftstoffverteilerleiste
PCT/DE2013/100035 WO2013113314A1 (fr) 2012-02-02 2013-01-31 Rampe distributrice de carburant

Publications (2)

Publication Number Publication Date
EP2809941A1 EP2809941A1 (fr) 2014-12-10
EP2809941B1 true EP2809941B1 (fr) 2015-12-30

Family

ID=47842984

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13708071.9A Active EP2809941B1 (fr) 2012-02-02 2013-01-31 Rampe distributrice de carburant

Country Status (6)

Country Link
US (1) US20150007796A1 (fr)
EP (1) EP2809941B1 (fr)
CN (1) CN103764996B (fr)
DE (1) DE102012001926A1 (fr)
HU (1) HUE026629T2 (fr)
WO (1) WO2013113314A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6314099B2 (ja) * 2015-02-24 2018-04-18 株式会社日立製作所 電力変換装置
DE102015104538A1 (de) * 2015-03-25 2016-09-29 Benteler Automobiltechnik Gmbh Rohrendverschluss zum Verschließen eines druckführenden Rohres
JP6850089B2 (ja) * 2016-08-05 2021-03-31 臼井国際産業株式会社 エンドキャップ
JP6788431B2 (ja) * 2016-08-25 2020-11-25 臼井国際産業株式会社 エンドキャップ
DE102017201616A1 (de) * 2017-02-01 2018-08-02 Te Connectivity Germany Gmbh Elektrisches Bauteil mit einer elektromagnetischen Abschirmung, Verfahren zur Herstellung eines elektrischen Bauteils mit einer elektromagnetischen Abschirmung
DE102018110342B4 (de) * 2018-04-30 2022-09-01 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung eines Kraftstoffverteilers
IT202000001468A1 (it) * 2020-01-27 2021-07-27 Dab Pumps Spa Collettore per elettropompa perfezionato ed elettropompa con un simile collettore

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DE2555960C2 (de) * 1975-12-12 1977-10-06 Mero Raumstruktur GmbH & Co Wurzburg, 8700 Wurzburg Verfahren zum Verlöten eines hohlzylindrischen Körpers oder dgl. mit einem im Preßsitz wenigstens teilweise in diesem angeordneten Körper
US4519368A (en) * 1982-05-04 1985-05-28 Sharon Manufacturing Company Fuel injection rail assembly
IT220614Z2 (it) * 1990-09-28 1993-10-06 Weber Srl Collettore di alimentazione del carburante per un dispositivo di alimentazione di un motore a combustione interna in grado di esplicare un'azione di smorzamento delle vibrazioni
DE29502829U1 (de) * 1995-02-21 1996-06-20 Robert Bosch Gmbh, 70469 Stuttgart Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
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Also Published As

Publication number Publication date
CN103764996B (zh) 2016-03-16
EP2809941A1 (fr) 2014-12-10
CN103764996A (zh) 2014-04-30
US20150007796A1 (en) 2015-01-08
HUE026629T2 (en) 2016-06-28
DE102012001926A1 (de) 2013-08-08
WO2013113314A1 (fr) 2013-08-08

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