EP1063420A2 - Système d'alimentation en carburant - Google Patents

Système d'alimentation en carburant Download PDF

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Publication number
EP1063420A2
EP1063420A2 EP00305314A EP00305314A EP1063420A2 EP 1063420 A2 EP1063420 A2 EP 1063420A2 EP 00305314 A EP00305314 A EP 00305314A EP 00305314 A EP00305314 A EP 00305314A EP 1063420 A2 EP1063420 A2 EP 1063420A2
Authority
EP
European Patent Office
Prior art keywords
common rail
fuel
injectors
fuel system
injector
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.)
Withdrawn
Application number
EP00305314A
Other languages
German (de)
English (en)
Other versions
EP1063420A3 (fr
Inventor
Malcolm David Dick Lambert
John Roderick Jefferson
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.)
Delphi Technologies Inc
Original Assignee
Delphi Technologies Inc
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 Delphi Technologies Inc filed Critical Delphi Technologies Inc
Publication of EP1063420A2 publication Critical patent/EP1063420A2/fr
Publication of EP1063420A3 publication Critical patent/EP1063420A3/fr
Withdrawn legal-status Critical Current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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • 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
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating 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
    • 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
    • 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

Definitions

  • This invention relates to a fuel supply system for use in supplying fuel under high pressure to the combustion spaces of a compression ignition internal combustion engine.
  • the invention relates, in particular, to a fuel system of the common rail type.
  • a common rail fuel system typically comprises a common rail in the form of a high pressure pipe which is charged to a high pressure by an appropriate high pressure fuel pump.
  • a plurality of connection lines are connected to the common rail, each connection line leading to a respective fuel injector.
  • Such a system is composed of a large number of components and a large number of high pressure seals must be formed between the various components. The high number of seals gives rise to a risk of fuel leakage.
  • the common rail is typically located outside of the engine housing where such a leakage may constitute a fire risk.
  • a fuel system for supplying fuel to an engine, said system comprising a common rail to which a plurality of injectors are connected, the common rail being located or adapted to be located, inside of a housing of the engine.
  • a fuel system comprising a common rail and at least one injector mounted directly upon the rail.
  • the common rail is preferably located within the engine rocker cover.
  • the common rail conveniently takes a suitable form to permit the injectors to be mounted directly thereto.
  • the common rail may be a one piece construction, or alternatively may be composed of a plurality of components, injectors being mounted upon either some or all of the components.
  • the component(s) may form part of the injector(s), or may define one or more coupling regions upon which the injectors are mounted.
  • the fire risk is reduced as compared with known systems where the common rail is located externally of the engine. Also, by mounting the injectors directly upon the common rail rather than using separate connection lines, the number of high pressure seals, and hence the risk of leakage, is reduced.
  • the fuel supply system illustrated in Figure 1 comprises a fuel pump 10 which, in use, is mounted upon an engine in such a manner as to be driven by the engine.
  • the outlet of the pump is connected to a common rail 11 which takes the form of a one piece forging.
  • a filter 12 is mounted, the filter 12 being arranged to remove particulate contaminants of dimensions greater than a predetermined level from the flow of fuel to the common rail 11.
  • the common rail 11 includes a first region 11 a extending in a first direction, and a plurality of laterally spaced second regions 11 b which extend transverse (in this embodiment, perpendicular) to the first direction and which are of relatively long axial extent.
  • Each of the second regions 11 b defines a deep recess communicating with an internal bore 11 c which extends along the length of the first region 11 a .
  • An end of each of the second regions 11 b remote from the first region 11 a is provided with an external screw thread to which a cap nut 13 is secured, the cap nut 13 being used to mount an injection nozzle 14 to that end of each second region 11 b .
  • the second regions 11 b serve, in effect, as nozzle holders for the injector nozzles 14.
  • each injector in addition to the nozzle 14, also includes a piezoelectric actuator stack 15 which is located within the deep recess formed in the associated second region 11 b .
  • each second region 11 b forms a housing of the injector which it supports and, in this embodiment, houses the piezoelectric actuator stack 15.
  • a valve needle 16 of the nozzle 14 can be moved between a closed position in which it engages a seating, preventing the flow of fuel from the common rail past the seating to a plurality of outlet openings, and a position in which the needle 16 is lifted from its seating, thus permitting fuel injection to take place.
  • the common rail 11 is located within a housing of the engine, as denoted by line 17 in Figure 1.
  • the housing 17 is a rocker cover of the engine, i.e. a cover for part of the mechanism used to open and close inlet and exhaust valves of the engine.
  • the common rail fuel system is relatively compact, and the risk of leakage of fuel at high pressure from the engine is reduced.
  • the injector nozzles 14 are mounted directly upon the common rail 11, the provision of separate connection lines to each injector is avoided, and the number of component parts is reduced. By reducing the number of component parts, the number of high pressure seals which must be provided in the fuel system can be reduced, thus further reducing the risk of leakage of fuel.
  • a further advantage associated with using the invention in conjunction with the injectors of the type illustrated in Figure 1 is that, as the recesses of the second regions 11 b of the common rail 11 serve to store a quantity of fuel at high pressure, the dimensions of the bore 11 c of the common rail 11 can be reduced compared to other arrangements.
  • the reduction in the size of the bore 11 c may be accompanied by a reduction in the outer diameter of the first region 11 a , resulting in the common rail 11 being of increased flexibility.
  • the flexibility may compensate for slight tolerance variations in the manufacture of engines and for differential thermal expansion, in use.
  • the injectors extend through the common rail 11, the height of the system can be reduced.
  • the common rail 11 is of one piece construction, if desired, the common rail could be constructed of a plurality of component parts.
  • the common rail 11 could be broken into a plurality of parts of generally L-shaped form, the parts being connected together by appropriate high pressure seals located at the locations denoted by dashed lines 18.
  • the forging furthest to the right is different from the remainder of the forgings as the bore 11 c does not extend from both sides of the second region 11 b of that forging.
  • the bore 11 c would extend laterally completely through the second region 11 b of that forging, and an appropriate seal used to plug the bore or an appropriate connection made to connect the bore to an appropriate reservoir.
  • both ends of the bore could be connected, through appropriate passages and filters, to the outlet of the high pressure pump.
  • the common rail may comprise a plurality of tubular member and a plurality of parts constituting the nozzle holders of the injectors, the parts being sealed together at both the locations denoted by dashed lines 18 and the locations denoted by dashed lines 19.
  • Figure 2 illustrates the use of the invention with a different type of injector, the injector illustrated in Figure 2 being of the electromagnetically actuable type.
  • the nozzle holder of the injector is modified to incorporate a region provided with, for example, a screw thread which is used to mount the injector upon the common rail 11.
  • the injector could be modified such that the cap nut is used to secure the injector to the common rail.
  • the common rail 11 has been modified such that the second regions 11 b are of relatively short axial length, thus avoiding any unnecessary increase in the size of the system.
  • the second regions 11 b define relatively large diameter volumes for storing fuel under high pressure, serving as accumulators for the associated injector, and thus permitting the bore 11 c of the common rail 11 to be of relatively small diameter giving rise to the advantage that the common rail 11 is relatively flexible as discussed hereinbefore.
  • the common rail 11 may take the form of a single part construction or may be composed of several components secured to one another using appropriate high pressure seals at the locations 18, 19 as discussed hereinbefore in relation to Figure 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)
EP00305314A 1999-06-25 2000-06-23 Système d'alimentation en carburant Withdrawn EP1063420A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9914790 1999-06-25
GBGB9914790.2A GB9914790D0 (en) 1999-06-25 1999-06-25 Fuel supply system

Publications (2)

Publication Number Publication Date
EP1063420A2 true EP1063420A2 (fr) 2000-12-27
EP1063420A3 EP1063420A3 (fr) 2003-08-06

Family

ID=10855991

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00305314A Withdrawn EP1063420A3 (fr) 1999-06-25 2000-06-23 Système d'alimentation en carburant

Country Status (2)

Country Link
EP (1) EP1063420A3 (fr)
GB (1) GB9914790D0 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1304477A3 (fr) * 2001-10-17 2004-05-19 Robert Bosch Corporation Module d'injection de carburant multi-point
EP1780406A1 (fr) * 2005-10-25 2007-05-02 CRT Common Rail Technologies AG Injecteur pour un système d'injection de carburant et système d'injection de carburant avec tel injecteur
DE102014213257A1 (de) * 2014-07-08 2016-01-14 Volkswagen Aktiengesellschaft Zylinderkopf für Brennkraftmaschine
WO2019111031A1 (fr) * 2017-12-08 2019-06-13 Volvo Truck Corporation Dispositif pour système d'injection de carburant à rampe de distribution commune
WO2020260667A1 (fr) * 2019-06-27 2020-12-30 Delphi Technologies Ip Limited Système de rampe commune
CN114174671A (zh) * 2019-07-31 2022-03-11 康明斯有限公司 模块化和可扩展的轨道的燃料系统架构

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4109653A1 (de) * 1991-03-23 1992-09-24 Bosch Gmbh Robert Kontaktierungsleiste zur gemeinsamen elektrischen kontaktierung mehrerer elektrisch betaetigbarer brennstoffeinspritzventile
DE4434783C2 (de) * 1994-09-29 1998-04-09 Daimler Benz Ag Kraftstoffeinspritzanlage für eine mehrzylindrige Brennkraftmaschine
JPH08189441A (ja) * 1994-11-04 1996-07-23 Toyota Motor Corp 樹脂製燃料分配管
DE19750298A1 (de) * 1997-11-13 1999-05-20 Man Nutzfahrzeuge Ag Brennkraftmaschine mit Hochdruckeinspritzsystem

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1304477A3 (fr) * 2001-10-17 2004-05-19 Robert Bosch Corporation Module d'injection de carburant multi-point
US6959695B2 (en) 2001-10-17 2005-11-01 Robert Bosch Corporation Multi-point fuel injection module
EP1780406A1 (fr) * 2005-10-25 2007-05-02 CRT Common Rail Technologies AG Injecteur pour un système d'injection de carburant et système d'injection de carburant avec tel injecteur
JP2007120500A (ja) * 2005-10-25 2007-05-17 Crt Common Rail Technologies Ag 燃料噴射装置用インジェクタおよび該インジェクタを備えた燃料噴射装置
DE102014213257A1 (de) * 2014-07-08 2016-01-14 Volkswagen Aktiengesellschaft Zylinderkopf für Brennkraftmaschine
DE102014213257B4 (de) 2014-07-08 2022-12-29 Volkswagen Aktiengesellschaft Zylinderkopf für Brennkraftmaschine
CN111433450A (zh) * 2017-12-08 2020-07-17 沃尔沃卡车集团 用于共轨燃料喷射系统的装置
US11136955B2 (en) 2017-12-08 2021-10-05 Volvo Truck Corporation Device for a common rail fuel injection system
CN111433450B (zh) * 2017-12-08 2022-01-28 沃尔沃卡车集团 用于共轨燃料喷射系统的装置
WO2019111031A1 (fr) * 2017-12-08 2019-06-13 Volvo Truck Corporation Dispositif pour système d'injection de carburant à rampe de distribution commune
WO2020260667A1 (fr) * 2019-06-27 2020-12-30 Delphi Technologies Ip Limited Système de rampe commune
CN114026321A (zh) * 2019-06-27 2022-02-08 德尔福知识产权有限公司 共轨系统
JP2022539104A (ja) * 2019-06-27 2022-09-07 デルフィ・テクノロジーズ・アイピー・リミテッド コモンレールシステム
US11828254B2 (en) 2019-06-27 2023-11-28 Delphi Technologies Ip Limited Common rail system
CN114174671A (zh) * 2019-07-31 2022-03-11 康明斯有限公司 模块化和可扩展的轨道的燃料系统架构

Also Published As

Publication number Publication date
EP1063420A3 (fr) 2003-08-06
GB9914790D0 (en) 1999-08-25

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