EP0426780B1 - Distributeur de carburant pour systemes d'injection dans des moteurs a combustion interne - Google Patents

Distributeur de carburant pour systemes d'injection dans des moteurs a combustion interne Download PDF

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Publication number
EP0426780B1
EP0426780B1 EP90904598A EP90904598A EP0426780B1 EP 0426780 B1 EP0426780 B1 EP 0426780B1 EP 90904598 A EP90904598 A EP 90904598A EP 90904598 A EP90904598 A EP 90904598A EP 0426780 B1 EP0426780 B1 EP 0426780B1
Authority
EP
European Patent Office
Prior art keywords
fuel
line
fuel line
fuel injection
distributor
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.)
Expired - Lifetime
Application number
EP90904598A
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German (de)
English (en)
Other versions
EP0426780A1 (fr
Inventor
Karl Gmelin
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
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0426780A1 publication Critical patent/EP0426780A1/fr
Application granted granted Critical
Publication of EP0426780B1 publication Critical patent/EP0426780B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
    • 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
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F02M53/04—Injectors with heating, cooling, or thermally-insulating means
    • 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 fuel distributor for fuel injection systems of internal combustion engines according to the preamble of independent claim 1.
  • Such a fuel rail is known (DE-A-36 44 552, DE-A-37 30 571). Due to the annular space surrounding the so-called side-feed construction, the fuel injection valves are directly surrounded by fuel and are thereby cooled. The cooling of the fuel injection valves lowers their thermal load and thereby improves the hot start behavior of the internal combustion engine as a whole.
  • the fuel distributor according to the invention with the characterizing features of claim 1 has the advantage that the flow orifice assigned to each fuel injection valve in the fuel line forces the fuel injection valves to be flushed by almost 360 °. In this way, the valve housing is flushed with fuel over a larger housing area and thus improves the cooling effect.
  • the improved cooling leads to a lower temperature level in the fuel injection valves during the operating phase of the internal combustion engine, so that the maximum temperature reached in the shutdown phase of the internal combustion engine is already lower in the fuel injection valves. Due to this lower temperature level, the formation of bubbles in the fuel is less during the shutdown phase of the internal combustion engine.
  • hot start When the internal combustion engine starts in this hot shutdown phase (hot start), the entire surface of the valve housing is cooled quickly and intensively and fresh, cool fuel is supplied to the valve chamber. The vapor bubbles in the fuel condense and are partially entrained, so that the hot start behavior of the internal combustion engine is significantly improved.
  • FIG. 1 and in FIGS. 2 and 3 in various sectional views for a fuel injection system for a four-cylinder internal combustion engine is used for mounting, supplying fuel and making electrical contact with four electromagnetically actuated fuel injection valves 10.
  • It has an elongated distributor housing 11 which has four axially spaced receiving bores 12 and two coaxial fuel lines, of which the larger diameter fuel line as the supply line 13 for supplying fuel to the fuel injection valves 10 and the smaller diameter fuel line running inside the supply line 13 as the return line 14 for returning fuel to one serves fuel tank, not shown.
  • Feed line 13 and return line 14 are connected to one another via a pressure control valve 15 and are connected at their free ends to a connecting piece 16 and 17, respectively.
  • the direction of flow of the fuel is marked by arrows on the connecting piece 16, 17.
  • the feed line 13 is guided tangentially past the receiving bores 12 and communicates with the receiving bores 12 via openings 18 which penetrate through the bore or line wall.
  • a fuel injection valve 10 is inserted in a liquid-tight manner in each receiving bore 12, which is effected by means of two O-rings 19, 20 (FIG. 3).
  • the stepped valve housing 21 is supported with an annular flange 22 on an annular shoulder 23 coaxially surrounding the receiving bore 12 and protrudes from the receiving bore 12 with an orifice 24, which has a fuel spray opening that cannot be seen at the end.
  • the gradation of the valve housing 21 creates an annular space 25 between the valve housing 21 and the bore wall of the receiving bore 12, which is constantly filled with fuel.
  • Fuel is supplied from this annular space 25 to a valve space present in the interior of the valve housing 21 via a sieve body 26.
  • a contact strip 27, which also serves to lock the fuel injection valves 10 in the receiving bores 12 is placed on the distributor housing 11 and, like the distributor housing 11, is made of plastic.
  • plugs 28 are arranged in the contact strip 27, of which each plug 28 is assigned to a fuel injection valve 10 and is used to make electrical contact with it.
  • flow orifices 29 are arranged in the latter in association with each receiving bore 12, which are approximately centered on the opening 18 and thus on the receiving bore 12 or Valve housing 21 of the fuel injection valve 10 are. These flow orifices 29 force the fuel to flow around the associated valve housing 21 by almost 360 °.
  • Each flow orifice 29 is formed by a disk 30, which is aligned transversely to the opening 18 and the flow direction in the feed line 13 and opens a small annular gap 32 with respect to the line wall of the feed line 13. All disks 30 are fastened on the return line 14. As can be seen from FIG.
  • the return line 14 has a cross-sectional profile that deviates from the circular shape, one dimension of which is larger than the dimension perpendicular to it. In the exemplary embodiment in FIG. 3, this cross-sectional profile is approximately rectangular with rounded corners.
  • Each disk 30 has a central opening 31, the opening cross section of which corresponds approximately to the cross-sectional profile of the return line 14, but is rotated through 90 ° with respect to this. The disks 30 are rotated through 90 ° with respect to their end position, with the opening 31 being pushed over the return line 14, and in their respective assignment position with the individual receiving bores 12 are rotated through 90 ° into their end position. As a result, the disks 30 jam on the return line 14 and are held there non-positively.
  • the invention is not restricted to the exemplary embodiment described.
  • the fuel line 14 can take over the function of the supply line and the fuel line 13 can take over the function of the return line.
  • the connecting piece 16 is to be connected to the fuel tank and the connecting piece 17 to the feed pump, also not shown, which draws the fuel from the fuel tank and delivers it to the fuel injection valves 10.

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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)

Abstract

Le distributeur de carburant décrit comporte un carter allongé (11) comprenant une pluralité d'alésages de réception (12) agencés à distance axiale, chacun recevant une soupage d'injection de carburant (10), et au moins une canalisation de carburant (13) qui s'étend axialement et passe tangentiellement devant les alésages de réception (12). Ladite canalisation de carburant communique par des ouvertures (18) avec les alésages de réception (12). Le carburant s'écoule autour des soupapes d'injection (10) par les ouvertures (18), ce qui assure l'alimentation en carburant ainsi que le refroidissement. Pour améliorer l'efficacité du refroidissement, des membranes d'écoulement (29) associées à chaque alésage de réception (12) sont disposées approximativement au centre de chaque ouverture. On obtient ainsi un balayage forcé des soupapes d'injection de carburant (10) sur environ 360°.

Claims (5)

  1. Distributeur de carburant pour systèmes d'injection de carburant de moteurs à combustion interne, avec un boîtier de répartiteur (11) allongé, qui comporte une pluralité d'alésages récepteurs (12) répartis axialement et au moins une canalisation de carburant (13) s'étendant axialement, qui passe tangentiellement devant les alésages récepteurs (12) et qui est en communication avec ces alésages récepteurs (12) par l'intermédiaire de respectivement une ouverture (18) traversant la paroi de l'alésage et/ou de la canalisation, et avec une pluralité de soupapes d'injection de carburant (10) respectivement insérées dans un alésage récepteur (12) de façon étanche aux liquides par rapport à la paroi de l'alésage et en ménageant une chambre annulaire (25) servant à l'arrosage par le carburant, soupapes dont la chambre est en communication par l'intermédiaire d'au moins une arrivée avec la chambre annulaire (25), et qui font saillie avec respectivement un orifice d'injection de carburant hors de l'alésage récepteur (12), distributeur de carburant caractérisé en ce que dans la canalisation de carburant (13) des diaphragmes d'écoulement (29) sont disposés en association à chaque alésage récepteur (12) environ au milieu de l'ouverture (18), tandis que chaque diaphragme d'écoulement (29) s'étend dans la canalisation de carburant (13) de façon que l'écoulement du carburant soit dévié dans la chambre annulaire (25) et autour de la soupape d'injection de carburant (10).
  2. Distributeur selon la revendication 1, caractérisé en ce que chaque diaphragme d'écoulement (29) est constitué par un disque (30) qui est disposé transversalement par rapport à l'ouverture (18) et par rapport à la direction d'écoulement dans la canalisation de carburant (13) et qui laisse libre un intervalle annulaire (32) vis à vis de la paroi de la canalisation de carburant (13).
  3. Distributeur selon la revendication 2, caractérisé en ce qu'à l'intérieur de la canalisation de carburant (13) s'étend une seconde canalisation de carburant (14), la première canalisation de carburant (13) servant à amener le carburant aux soupapes d'injection de carburant (10) tandis que l'autre canalisation de carburant (14) sert au retour du carburant à partir des soupapes d'injection de carburant (10), et en ce que les disques (30) sont fixés sur la seconde canalisation de carburant (14).
  4. Distributeur selon la revendication 3, caractérisé en ce que la seconde canalisation de carburant (14) a un profil en section transversale s'écartant de la forme circulaire, et dont une dimension est supérieure à la dimension qui lui est perpendiculaire, et en ce que le disque (30) comporte une ouverture centrale (31) avec à peu près le même profil d'ouverture, mais toutefois décalé en rotation de 90°, de sorte que le disque (30) peut être poussé sur la seconde canalisation de carburant (14) et y être maintenu par adhérence après une rotation de 90°.
  5. Distributeur selon la revendication 3 ou la revendication 4, caractérisé en ce que les deux canalisations de carburant (13, 14) sont reliées ensemble par l'intermédiaire d'une soupape de réglage de la pression (15) disposée dans le boîtier du distributeur (11), et en ce que chaque canalisation de carburant (13, 14) est reliée à son extrémité à une tubulure de raccordement (16, 17) faisant saillie sur le boîtier du distributeur (11).
EP90904598A 1989-05-02 1990-03-23 Distributeur de carburant pour systemes d'injection dans des moteurs a combustion interne Expired - Lifetime EP0426780B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3914487A DE3914487A1 (de) 1989-05-02 1989-05-02 Kraftstoffverteiler fuer kraftstoffeinspritzanlagen von brennkraftmaschinen
DE3914487 1989-05-02

Publications (2)

Publication Number Publication Date
EP0426780A1 EP0426780A1 (fr) 1991-05-15
EP0426780B1 true EP0426780B1 (fr) 1993-06-02

Family

ID=6379934

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90904598A Expired - Lifetime EP0426780B1 (fr) 1989-05-02 1990-03-23 Distributeur de carburant pour systemes d'injection dans des moteurs a combustion interne

Country Status (7)

Country Link
US (1) US5143039A (fr)
EP (1) EP0426780B1 (fr)
JP (1) JPH04500112A (fr)
KR (1) KR920700347A (fr)
BR (1) BR9006752A (fr)
DE (2) DE3914487A1 (fr)
WO (1) WO1990013741A1 (fr)

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US5035221A (en) * 1989-01-11 1991-07-30 Martin Tiby M High pressure electronic common-rail fuel injection system for diesel engines
IT1234285B (it) * 1989-06-13 1992-05-14 Weber Srl Collettore di carburante preferibilmente in materiale plastico atto adalimentare carburante agli iniettori di un dispositivo di alimentazione per un motore a combustione interna
DE4013537A1 (de) * 1990-04-27 1991-10-31 Bosch Gmbh Robert Kontaktierungsleiste zur gemeinsamen elektrischen kontaktierung mehrerer elektrisch erregbarer aggregate von brennkraftmaschinen
US5086743A (en) * 1990-12-20 1992-02-11 Ford Motor Company Integrally formed and tuned fuel rail/injectors
DE4111988C2 (de) * 1991-04-12 1994-07-14 Bosch Gmbh Robert Brennstoffverteiler
DE4115039A1 (de) * 1991-05-08 1992-11-12 Bosch Gmbh Robert Brennstoffverteiler
DE4206370A1 (de) * 1991-05-17 1992-11-19 Mann & Hummel Filter Steuerleiste in kunststoffkompaktbauweise
DE4128086A1 (de) * 1991-08-24 1993-02-25 Bosch Gmbh Robert Brennstoffverteiler
EP0536091A1 (fr) * 1991-09-30 1993-04-07 Giuseppe Baggioli Dispositif de distribution et d'injection de combustible aux cylindres d'un moteur à combustion interne
DE4205709A1 (de) * 1992-02-25 1993-08-26 Bosch Gmbh Robert Gasverteiler fuer brennstoffeinspritzanlagen
IT227559Y1 (it) * 1992-05-21 1997-12-15 Weber Srl Collettore per un dispositivo di alimentazione di carburante ad un mo- tore a combustione interna.
US5408971A (en) * 1993-08-09 1995-04-25 Brunswick Corporation Fuel rail construction for an electronic fuel injected engine
DE19515535A1 (de) * 1995-04-27 1996-10-31 Bayerische Motoren Werke Ag Kraftstoffverteilerleitung
US5718206A (en) * 1995-10-12 1998-02-17 Nippondenso Co., Ltd. Fuel supply system having fuel rail
DE19640480B4 (de) * 1996-09-30 2004-04-22 Robert Bosch Gmbh Kraftstoffhochdruckspeicher
US5806494A (en) * 1997-08-06 1998-09-15 Caterpillar Inc. Hydraulically actuated fuel injection system with integrated actuation fluid rail and injectors
JPH11351095A (ja) * 1998-06-11 1999-12-21 Toyota Motor Corp 筒内噴射式内燃機関のデリバリパイプ
JP2000265922A (ja) * 1999-03-16 2000-09-26 Honda Motor Co Ltd 燃料噴射装置
EP1224390B1 (fr) 1999-09-10 2004-06-16 International Engine Intellectual Property Company, LLC. Systeme de distribution de fluide d'actionnement pour injecteur de carburant
US6148798A (en) * 1999-10-01 2000-11-21 Delphi Technologies, Inc. Coaxial flow through fuel rail with a damper for a recirculating fuel system
US6467457B1 (en) 1999-10-25 2002-10-22 International Engine Intellectual Property Company, L.L.C. Injector actuating fluid check and methods
US6374806B1 (en) 1999-10-25 2002-04-23 International Truck And Engine Corp. Actuating fluid delivery system for a fuel injector
DE10055675A1 (de) * 2000-11-10 2002-05-16 Volkswagen Ag Einrichtung zur Verteilung von Kraftstoff für eine Brennktaftmaschine
US8434457B2 (en) 2010-06-29 2013-05-07 Caterpillar Inc. System and method for cooling fuel injectors
CN106837644A (zh) * 2017-04-18 2017-06-13 广西玉柴机器股份有限公司 多功能燃油分配器
US11708810B1 (en) * 2022-05-17 2023-07-25 Caterpillar Inc. Fuel system and engine head assembly having double-walled fuel connector for cooling fuel return

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JP2694276B2 (ja) * 1988-04-18 1997-12-24 スズキ株式会社 燃料供給装置

Also Published As

Publication number Publication date
DE59001612D1 (de) 1993-07-08
WO1990013741A1 (fr) 1990-11-15
DE3914487A1 (de) 1990-11-08
KR920700347A (ko) 1992-02-19
BR9006752A (pt) 1991-08-06
EP0426780A1 (fr) 1991-05-15
US5143039A (en) 1992-09-01
JPH04500112A (ja) 1992-01-09

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