EP1403508A2 - Ensemble d'alimentation de carburant - Google Patents

Ensemble d'alimentation de carburant Download PDF

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Publication number
EP1403508A2
EP1403508A2 EP03021338A EP03021338A EP1403508A2 EP 1403508 A2 EP1403508 A2 EP 1403508A2 EP 03021338 A EP03021338 A EP 03021338A EP 03021338 A EP03021338 A EP 03021338A EP 1403508 A2 EP1403508 A2 EP 1403508A2
Authority
EP
European Patent Office
Prior art keywords
fuel
fuel supply
region
return
channel
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Withdrawn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
EP03021338A
Other languages
German (de)
English (en)
Other versions
EP1403508A3 (fr
Inventor
Fernando Sandoval
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.)
Deere and Co
Original Assignee
Deere and Co
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 Deere and Co filed Critical Deere and Co
Publication of EP1403508A2 publication Critical patent/EP1403508A2/fr
Publication of EP1403508A3 publication Critical patent/EP1403508A3/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Withdrawn legal-status Critical Current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
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of 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
    • F02M55/002—Arrangement of leakage or drain conduits in or from 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

Definitions

  • the invention relates to a fuel supply assembly having a plurality of intersecting fuel supply openings and fuel injection openings and a common return flow channel, which connects the fuel inlet openings to a fuel reservoir, and a plurality of fuel injection nozzles arranged in the fuel injection openings, which have a return flow outlet, which guides excess fuel from the fuel injection nozzle, and one A plurality of fuel supply elements which are arranged in the fuel supply openings and each have a fuel supply channel which guides pressurized fuel to an associated fuel injection nozzle.
  • US-A-5,839,661 shows a diesel engine with a solenoid operated fuel injector.
  • Such an injector has a solenoid operated valve element and a needle valve.
  • the valve element enables fuel flow from a fuel inlet to a fuel outlet.
  • the needle valve is moved to open and close a nozzle through which fuel is injected. Excess fuel can leave such a fuel injection nozzle via a fuel outlet and reach a fuel reservoir via a return flow channel.
  • Known internal combustion engines often require that a separate fuel return channel in the engine block and a separate, external fuel line are provided for each fuel injection nozzle.
  • WO-A-99/35393 shows a fuel injector fed from the side.
  • the fuel is introduced into the fuel injection nozzle from a fuel supply element, which is arranged in a fuel supply opening, via a holding device.
  • a holder is provided which, together with the fuel supply opening, forms a reflux chamber, which with is connected to a return flow channel.
  • the object underlying the invention is seen in the simplification of known fuel delivery assemblies.
  • a fuel supply assembly which has a plurality of fuel injection openings, in each of which a fuel injection nozzle is arranged.
  • the internal combustion engine also has a plurality of fuel supply openings, in each of which a fuel supply element is provided.
  • Each fuel supply element engages in a side region of an associated fuel injection nozzle and supplies fuel under pressure in this.
  • An outer surface of the fuel supply element and an inner surface of each fuel supply bore form a return chamber which communicates with a fuel return channel.
  • a common fuel return channel connects the fuel supply ports to a single external return port, which can be connected to a single external fuel return line.
  • a fuel delivery assembly 10 having an engine block 12 to which a cylinder head 14 is attached.
  • the engine block 12 has a plurality of fuel injection openings 16, one of which is shown in FIG. 1.
  • Each fuel injection port 16 receives a conventional fuel injector 18 for injecting pressurized fuel into an engine cylinder (not shown).
  • the fuel injection nozzle 18 has a supply channel 19, a central axial bore 20 which receives a control piston (not shown) and a return flow channel 23.
  • a recess 21 is provided in one side of the fuel injection nozzle 18.
  • a radially extending feed channel 22 connects the recess 21 to the feed channel 19.
  • a radially extending backflow outlet 24 connects the backflow channel 23 to an outer surface of the fuel injector 18 and to an annular return chamber 26 which is between the fuel injector 18 and a wall or inner surface 28 of the Fuel injection opening 16 is provided.
  • a fuel injector is described in U.S. Patent No. 5,839,661 and has a solenoid operated valve (not shown) which controls fuel injection events and the connection of fuel return to the return passage 23.
  • a plurality of fuel supply openings 30 extend through the engine block 12, a pair of which is visible in FIG. 2.
  • Each fuel supply opening 30 has an axis that is substantially perpendicular to the axis of the corresponding fuel injection opening 16.
  • An inner end region of each fuel supply opening opens into or crosses a corresponding fuel injection opening 16.
  • Each fuel supply opening 30 has an outer region 32 with a thread and a larger diameter and an inner region 34 with a smaller diameter.
  • the engine block 12 also has a single fuel return channel 36, which is connected to all fuel supply openings 30 and which is connected to a single fuel return channel 37 and a single external or external fuel return line 38, which is connected to a fuel tank or a fuel reservoir 39 communicates.
  • a fuel supply element 40 is provided in each fuel supply opening 30.
  • Each fuel supply element 40 has a region 42 with a larger diameter with an external screw thread for a threaded connection with the corresponding region 32 of the fuel supply opening 30.
  • the fuel supply element 40 also has a region 44 with a smaller diameter, which is arranged displaceably in the region 34.
  • An annular groove 46 is provided in the area 44 to receive an annular sealing element 48.
  • the fuel supply element 40 has a central axial fuel supply channel 50 which extends through it. An outer end portion of the fuel supply passage 50 receives pressurized fuel from a fuel source (not shown).
  • An inner region or a tip 52 of the fuel supply element 40 is received by a wall of the recess 21 or engages in it, so that the fuel supply channel 50 is connected to the supply channels 19, 22.
  • the outer surface of the fuel supply element 40 and the wall of the fuel supply opening 30 form an axially extending annular return chamber 54, which is connected to the fuel return channel 36 and to the return chamber 26. In this way, a return path for excess fuel is provided through the return channel 24, the return chamber 26, the return chamber 54, the fuel return channel 36, the fuel return channel 37 and the return line 38.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP03021338A 2002-09-24 2003-09-20 Ensemble d'alimentation de carburant Withdrawn EP1403508A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/254,962 US6840225B2 (en) 2002-09-24 2002-09-24 Fuel injector assembly
US254962 2002-09-24

Publications (2)

Publication Number Publication Date
EP1403508A2 true EP1403508A2 (fr) 2004-03-31
EP1403508A3 EP1403508A3 (fr) 2006-06-07

Family

ID=31977835

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03021338A Withdrawn EP1403508A3 (fr) 2002-09-24 2003-09-20 Ensemble d'alimentation de carburant

Country Status (5)

Country Link
US (1) US6840225B2 (fr)
EP (1) EP1403508A3 (fr)
JP (1) JP2004116519A (fr)
CA (1) CA2438643A1 (fr)
MX (1) MXPA03008581A (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4049684B2 (ja) * 2003-02-14 2008-02-20 愛知機械工業株式会社 エンジンの燃料系保護装置
US20080098989A1 (en) * 2006-10-31 2008-05-01 Caterpillar Inc. Fuel-injection system
US7543567B2 (en) * 2007-10-29 2009-06-09 Caterpillar Inc. Fuel system having a one-piece hollow tube connection
US9239035B2 (en) * 2010-11-06 2016-01-19 Hans-Jurgen Guido Connection arrangement for a tubular fuel line
US8991360B2 (en) 2012-06-27 2015-03-31 Caterpillar Inc. Coaxial quill assembly retainer and common rail fuel system using same
US9181881B2 (en) 2012-08-03 2015-11-10 Caterpillar Inc. Co-axial quill assembly retainer and dual fuel common rail engine using same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845748A (en) * 1972-09-29 1974-11-05 Mack Trucks Fuel injection nozzle holder installation
US5365907A (en) * 1992-11-21 1994-11-22 Mercedes-Benz Ag Cylinder head for an internal combustion engine with fuel injection
US5839661A (en) * 1995-12-05 1998-11-24 Denso Corporation Solenoid valve and fuel injector for internal combustion engine using the same
WO1999035393A1 (fr) * 1997-12-30 1999-07-15 Perkins Engines Company Limited Appareil et procede de raccordement d'un tube de pression de carburant a un injecteur de carburant d'un moteur a combustion interne

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4601275A (en) * 1982-08-23 1986-07-22 General Motors Corporation Fuel rail
US5201295A (en) * 1986-07-30 1993-04-13 Ail Corporation High pressure fuel injection system
GB9824735D0 (en) * 1998-11-12 1999-01-06 Lucas Ind Plc Injector and injector assembly
DE19931282C1 (de) * 1999-07-07 2001-01-11 Mtu Friedrichshafen Gmbh Kraftstoffeinspritzsystem für eine Brennkraftmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845748A (en) * 1972-09-29 1974-11-05 Mack Trucks Fuel injection nozzle holder installation
US5365907A (en) * 1992-11-21 1994-11-22 Mercedes-Benz Ag Cylinder head for an internal combustion engine with fuel injection
US5839661A (en) * 1995-12-05 1998-11-24 Denso Corporation Solenoid valve and fuel injector for internal combustion engine using the same
WO1999035393A1 (fr) * 1997-12-30 1999-07-15 Perkins Engines Company Limited Appareil et procede de raccordement d'un tube de pression de carburant a un injecteur de carburant d'un moteur a combustion interne

Also Published As

Publication number Publication date
US20040056116A1 (en) 2004-03-25
CA2438643A1 (fr) 2004-03-24
JP2004116519A (ja) 2004-04-15
EP1403508A3 (fr) 2006-06-07
US6840225B2 (en) 2005-01-11
MXPA03008581A (es) 2004-03-26

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