EP0921303B1 - Système d' injection par alimentation commune des injecteurs pour moteurs à combustion interne - Google Patents

Système d' injection par alimentation commune des injecteurs pour moteurs à combustion interne Download PDF

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Publication number
EP0921303B1
EP0921303B1 EP19980119363 EP98119363A EP0921303B1 EP 0921303 B1 EP0921303 B1 EP 0921303B1 EP 19980119363 EP19980119363 EP 19980119363 EP 98119363 A EP98119363 A EP 98119363A EP 0921303 B1 EP0921303 B1 EP 0921303B1
Authority
EP
European Patent Office
Prior art keywords
claw
common rail
injector
injection system
internal combustion
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
EP19980119363
Other languages
German (de)
English (en)
Other versions
EP0921303A2 (fr
EP0921303A3 (fr
Inventor
Heribert Dipl.-Ing. Möller (FH)
Manfred Dipl.-Ing. Pister (Fh)
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.)
MAN Truck and Bus SE
Original Assignee
MAN Nutzfahrzeuge AG
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 MAN Nutzfahrzeuge AG filed Critical MAN Nutzfahrzeuge AG
Publication of EP0921303A2 publication Critical patent/EP0921303A2/fr
Publication of EP0921303A3 publication Critical patent/EP0921303A3/fr
Application granted granted Critical
Publication of EP0921303B1 publication Critical patent/EP0921303B1/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
    • 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
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/242—Arrangement of spark plugs or injectors
    • 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
    • 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
    • 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
    • F02M63/0205—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 for cutting-out pumps or injectors in case of abnormal operation of the engine or the injection apparatus, e.g. over-speed, break-down of fuel pumps or injectors ; for cutting-out pumps for stopping the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Definitions

  • the invention relates to a common rail injection system according to the preamble of claim 1.
  • Common rail injection systems usually consist of a pump, a storage tank and at least one injector per cylinder.
  • the memory and the injectors will be connected to each other via injection lines.
  • the memory must be special Elements are attached to the cylinder head and the injection pipes represent a special installation effort.
  • the invention is based on the object, the structural complexity of the connection to minimize memory and injectors.
  • the direct connection of the memory to the claw eliminates the injection lines. As a result, assembly effort is saved and broken lines are avoided.
  • the memory also does not require a separate attachment to the Internal combustion engine.
  • the flow restrictor prevents the escape of fuel in the event of a larger leak.
  • the injection system according to the invention is made of a pump, not shown here, a memory 1 and injectors formed, of which only one injector 2 is shown here.
  • the memory 1 is connected according to the invention directly with a claw 3, which is fastened by means of a screw 4 on the cylinder head 5. Only for hedging against larger leaks, a flow restrictor 6 between memory 1 and Claw 3 be interposed.
  • the claw 3 has an integrated bore 7. Between Claw 3 and injector 2 is a pressure tube 8 clamped with a hole which the Making connection from the bore 7 to the injector 2. The sealing of the free Ends of the pressure tube 8 against the injector 2 on the one hand and against the claw 3 on the other takes place by a convex surface of the ends of the pressure tube eighth which are pressed against tapered sealing seats in the injector 2 and claw 3. By the convex surface of the free ends of the pressure tube 8, this small Run angle deviations in the direction of the axis of the memory 1, if through thermal expansion of the cooled by the fuel storage 1 relative to the Cylinder head 5 length differences occur.
  • a flow restrictor 6 is provided which is formed from a clamping sleeve 9, which with the memory 1 and the Claw 3 by means of a left-hand thread 10a or a right-hand thread 10b or vice versa connected is.
  • a concentric lying sealing sleeve 11 Inside the clamping sleeve 9 is a concentric lying sealing sleeve 11, in which a spring-loaded piston 12 is guided.
  • the Spring force counteracts the direction of flow. In normal operating condition is enough the force of the spring and the back pressure from the injector 1 forth to the piston 12th to keep against the fuel pressure in the initial position drawn.
  • Of the Fuel passes through the holes in the piston 12 and the bore 7, and over the pressure tube 8 to the injector 1.
  • the flow of the fuel increases a major leakage compared to full load, so includes Valve seat 13 by the increased pressure difference against the spring force and locks for the corresponding injector the flow.

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 (2)

  1. Système d'injection à rampe commune pour moteurs à combustion interne, comprenant une pompe, un accumulateur et au moins un injecteur par cylindre, dans lequel l'accumulateur est relié aux injecteurs par des éléments de liaison, et une griffe (3) avec alésage intégré vissée avec la culasse (5) et un tube de pression (8) enserré entre la griffe (3) et l'injecteur (2) servent d'élément de liaison,
    caractérisé en ce que
    l'accumulateur (1) est directement relié à la griffe (3).
  2. Rampe commune selon la revendication 1,
    caractérisée en ce que
    pour chaque injecteur (2) un limiteur de débit (6) est disposé entre la griffe (3) et l'accumulateur (1).
EP19980119363 1997-12-05 1998-10-14 Système d' injection par alimentation commune des injecteurs pour moteurs à combustion interne Expired - Lifetime EP0921303B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19754132 1997-12-05
DE19754132A DE19754132B4 (de) 1997-12-05 1997-12-05 Common Rail Einspritzsystem für Brennkraftmaschinen

Publications (3)

Publication Number Publication Date
EP0921303A2 EP0921303A2 (fr) 1999-06-09
EP0921303A3 EP0921303A3 (fr) 2003-01-02
EP0921303B1 true EP0921303B1 (fr) 2005-12-28

Family

ID=7850946

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980119363 Expired - Lifetime EP0921303B1 (fr) 1997-12-05 1998-10-14 Système d' injection par alimentation commune des injecteurs pour moteurs à combustion interne

Country Status (2)

Country Link
EP (1) EP0921303B1 (fr)
DE (2) DE19754132B4 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19960480A1 (de) 1999-12-15 2001-06-21 Man Nutzfahrzeuge Ag Common Rail Einspritzsystem
DE10006658B4 (de) * 2000-02-15 2004-08-26 Siemens Ag Einspritzanlage
EP1793121B1 (fr) * 2002-07-01 2009-01-14 Mitsubishi Heavy Industries, Ltd. Injecteur de carburant et moteur diesel le comprenant
ATE530761T1 (de) 2007-09-13 2011-11-15 Ganser Hydromag Brennstoffeinspritzvorrichtung
EP2060776B1 (fr) * 2007-11-13 2011-10-05 Delphi Technologies Holding S.à.r.l. Lance de carburant
DE102009020867B4 (de) * 2009-05-12 2022-01-27 Bayerische Motoren Werke Aktiengesellschaft Brennkraftmaschine mit einem Kraftstoffinjektor

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3728576A1 (de) * 1987-08-27 1989-03-09 Opel Adam Ag Kraftstoffeinspritzanlage
DE4318434A1 (de) * 1993-06-03 1994-12-08 Opel Adam Ag Haltevorrichtung für ein Kraftstoffeinspritzventil eines Dieselmotors
JP3298262B2 (ja) * 1993-10-13 2002-07-02 株式会社デンソー 蓄圧式燃料噴射装置
DE4340311C1 (de) * 1993-11-26 1994-12-15 Daimler Benz Ag Verfahren zur Kraftstoffeinspritzung für eine Brennkraftmaschine mit Hochdruckeinspritzung
DE9410232U1 (de) * 1994-06-27 1995-11-02 Robert Bosch Gmbh, 70469 Stuttgart Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
DE29502829U1 (de) * 1995-02-21 1996-06-20 Robert Bosch Gmbh, 70469 Stuttgart Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
JPH08261105A (ja) * 1995-03-22 1996-10-08 Mitsubishi Motors Corp 内燃機関用燃料噴射装置
JP3371620B2 (ja) * 1995-05-29 2003-01-27 いすゞ自動車株式会社 コモンレール式燃料噴射装置
DE19543506C2 (de) * 1995-11-22 1998-04-09 Man Nutzfahrzeuge Ag Anschluß einer Einspritzleitung an ein Einspritzventil
DE19548610A1 (de) * 1995-12-23 1997-06-26 Bosch Gmbh Robert Kraftstoffeinspritzeinirchtung für Brennkraftmaschinen
DE19601496C2 (de) * 1996-01-17 1998-07-30 Man Nutzfahrzeuge Ag Anschluß einer Einspritzleitung an ein Druckrohr eines Einspritzventils

Also Published As

Publication number Publication date
DE19754132A1 (de) 1999-06-10
EP0921303A2 (fr) 1999-06-09
DE59813313D1 (de) 2006-02-02
EP0921303A3 (fr) 2003-01-02
DE19754132B4 (de) 2005-06-23

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