EP2809941A1 - Rampe distributrice de carburant - Google Patents

Rampe distributrice de carburant

Info

Publication number
EP2809941A1
EP2809941A1 EP13708071.9A EP13708071A EP2809941A1 EP 2809941 A1 EP2809941 A1 EP 2809941A1 EP 13708071 A EP13708071 A EP 13708071A EP 2809941 A1 EP2809941 A1 EP 2809941A1
Authority
EP
European Patent Office
Prior art keywords
fuel rail
plug
fuel
stopper
rail
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
EP13708071.9A
Other languages
German (de)
English (en)
Other versions
EP2809941B1 (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

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
    • 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.
  • a tubular fuel rail which is arranged in the vicinity of a cylinder head and is secured by means of retaining elements thereto.
  • injectors which inject the fuel into the combustion chamber of the respective cylinder.
  • 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.
  • common rail technology it is about 1800 bar and rises up to 2500 bar in a so-called pump-nozzle technology.
  • pump-nozzle technology For gasoline, the usual working pressures are around 1 to 100 bar.
  • the fuel rail Only with a high-pressure direct injection into a gasoline engine, 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.
  • DE 10 2009 029 219 A1 shows a fuel rail for a diesel internal combustion 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.
  • 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.
  • DE 10 2008 044 923 A1 shows a fuel rail, which is closed at the end with one stopper each. Both plugs are designed as cup-shaped thermoforming or sheet metal component, inserted into the fuel rail and soldered as well as other connection components with this.
  • 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.
  • a generic tubular fuel rail which is closed at the end with a plug which is inserted into the fuel rail and soldered to this, interpreted to an operating pressure of 200 to 800 bar.
  • This object is achieved by the invention with the features of claim 1. Accordingly, in a tubular fuel rail, which is closed at the end with a plug which is inserted into the fuel rail and soldered to it, a pipe wall of the fuel rail at the end inside provided with a recess and the plug is engaged with the recess. This means that the pipe wall of the fuel rail is processed at the ends to be closed in such a way that continues after joining the pipe wall thickness of the fuel rail in the plug.
  • the approach of the plug is flush with the pipe wall of the fuel rail.
  • the power flow is not distracted.
  • 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.
  • 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 shows a plan view of a fuel distributor strip (1) according to the invention
  • Figure 2 shows a longitudinal section through the fuel rail according to the invention (1).
  • FIG. 3 shows a detailed view of the connection of plugs (5) from FIG. 2 to FIG.
  • Figure 4 shows the plug (5) of Figure 3 enlarged with marked
  • FIG. 5 shows an alternative plug (14) with a drawn aspect ratio.
  • FIG. 1 the fuel rail (1) according to the invention with a pipe wall (2), connection sockets (3) for injection valves and holders (4) for fixing to an internal combustion engine in a plan view is shown. At the end, the fuel rail (1) with two different plugs (5) and (6) is closed.
  • FIG. 2 shows a longitudinal section through the fuel distributor strip (1) according to the invention.
  • a supply of fuel through the passage (12) is possible.
  • a high-pressure pump (not shown)
  • 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 (1 1) has been introduced. In this recess (1 1) 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.
  • shoulder (7) and circumferential groove (8) are also present at the plug (6). While in the passage (12) of the plug (6), however, the fuel in the fuel rail (1) is supplied, sits in the opening (10) of the plug (5), a pressure sensor.
  • 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.
  • FIG. 4 shows the plug of FIG. 3 enlarged.
  • the inner length Li of the attachment (7) is decisive. Li 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). Dividing the thus determined outer length L 2 of the solder surface (17) on the plug (5) by the inner length Li of the approach (7), the ratio should be greater than or equal to 2, ie L 2 : Li> 2.
  • the plug could also be pasted with a solder.
  • a groove for receiving the solder ring is unnecessary.
  • 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). Li is measured as well as the plug (5) from the approach end (15) to the bottom (16). Again, for an optimum stress ratio in the joint L 2 : Li> 2 applies.

Abstract

L'invention concerne une rampe distributrice de carburant (1) pour essence, dont chaque extrémité est fermée au moyen d'un bouchon (5, 6), le bouchon (5, 6) étant enfoncé dans la rampe distributrice de carburant (1) et brasé avec celle-ci. Les bouchons (5, 6) et la rampe distributrice de carburant (1) sont prévus pour une pression de service de 200 à 800 bars. Selon l'invention, une paroi tubulaire (2) de la rampe distributrice de carburant (1) comporte, à cet effet, un renfoncement (11) intérieur à chacune de ses extrémités. Le bouchon (5, 6) est en contact avec le renfoncement (11) et présente un épaulement (7) affleurant par rapport à la paroi tubulaire (2) de la rampe distributrice de carburant (1).
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 true EP2809941A1 (fr) 2014-12-10
EP2809941B1 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)

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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
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Also Published As

Publication number Publication date
CN103764996A (zh) 2014-04-30
DE102012001926A1 (de) 2013-08-08
EP2809941B1 (fr) 2015-12-30
CN103764996B (zh) 2016-03-16
US20150007796A1 (en) 2015-01-08
WO2013113314A1 (fr) 2013-08-08
HUE026629T2 (en) 2016-06-28

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