EP2627892A1 - Ensemble port de connexion d'injecteur de carburant - Google Patents

Ensemble port de connexion d'injecteur de carburant

Info

Publication number
EP2627892A1
EP2627892A1 EP11833459.8A EP11833459A EP2627892A1 EP 2627892 A1 EP2627892 A1 EP 2627892A1 EP 11833459 A EP11833459 A EP 11833459A EP 2627892 A1 EP2627892 A1 EP 2627892A1
Authority
EP
European Patent Office
Prior art keywords
rail
assembly
vertical passage
connection port
fluid passageway
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Withdrawn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
EP11833459.8A
Other languages
German (de)
English (en)
Inventor
Robert Donald Roy
Michael Cosby
Stephen Singleton
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.)
International Engine Intellectual Property Co LLC
Original Assignee
International Engine Intellectual Property Co LLC
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 International Engine Intellectual Property Co LLC filed Critical International Engine Intellectual Property Co LLC
Publication of EP2627892A1 publication Critical patent/EP2627892A1/fr
Withdrawn legal-status Critical Current

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
    • F02M39/00—Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements
    • F02M39/02—Arrangements of fuel-injection apparatus to facilitate the driving of pumps; Arrangements of fuel-injection pumps; Pump drives
    • 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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/02—Injectors structurally combined with fuel-injection pumps
    • F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
    • F02M57/025—Injectors structurally combined with fuel-injection pumps characterised by the pump drive hydraulic, e.g. with pressure amplification

Definitions

  • HEUI Hydraulically actuated, electronically controlled, unit fuel injection systems
  • fluid is supplied at high pressure through a common rail to each of a series of unit fuel injectors within the cylinder head.
  • Each injector includes an electronically controlled valve, which governs the application of the high-pressure fluid to provide the force to inject fuel into the engine cylinders.
  • Each HEUI fuel injector has an actuating fluid control valve that is electronically controlled to control the timing and amount of the actuating fluid flowing into the injector.
  • the actuating fluid control valve initiates and terminates the injection process.
  • a representative HEUI fuel injector has a plunger that is displaced within an internal pumping chamber by fluid from the rail when an electronically controlled valve in the injector opens in response to a signal from the engine controller to inject fuel into a combustion chamber.
  • the fluid acts via the plunger to amplify the fuel pressure in the pumping chamber to a magnitude large enough to force a normally closed valve at an outlet of the fuel injector to open. When the latter valve opens, the amplified fuel pressure forces fuel through the outlet and into the combustion chamber.
  • the rails include injector port for physically and fluidly interconnecting the rail with the fuel injectors.
  • the injector ports are mounted in the bottom of the rail and are positioned to align different ones of the fuel injectors when the rail is mounted on the engine. Space limitations and the tight tolerance constraints between the connection ports and the injectors can make it difficult and time consuming to install the rail onto the engine.
  • a fuel injector connection port assembly couples a fuel injector to a rail including a fluid passageway for conveying actuating fluid under pressure from an actuating fluid source to a fuel injector of an engine, and a vertical passage that extends through the rail to a location that aligns with the fuel injector when the rail is mounted on the engine.
  • the assembly comprises an upper member mountable through the upper end of the vertical passage.
  • a lower member is mountable through the lower end of the vertical passage and defines a connection port configured to mate with a reciprocal connector on the fuel injector.
  • the upper and lower members are configured to interconnect with each other to secure the assembly in the vertical passage. At least one of the upper and lower members defines a fluid passageway that fluidly interconnects the fluid passageway of the rail with the connection port.
  • Another embodiment provides an assembly for delivering high pressure actuating fluid to a plurality hydraulically-actuated, electronically-controlled unit fuel injectors.
  • the assembly comprises a rail including a generally longitudinal passage and a plurality of vertical passages with each vertical passage extending through the rail to a location that aligns with a different one of a plurality of fuel injection connection port assemblies when the rail is mounted on the engine.
  • Each injection port connection assembly comprises an upper member mountable through the upper end of the vertical passage and a lower member mountable through the lower end of the vertical passage and defining a connection port configured to mate with a reciprocal connector on the fuel injector.
  • the upper and lower members are configured to interconnect with each other to secure the connection port assembly in the vertical passage. At least one of the upper and lower members define a fluid passageway that fluidly interconnects a fluid passageway of the rail with the connection port in the lower member.
  • FIG. 1 is an exploded perspective view of a fuel injection connection port.
  • FIG. 2 a section view showing the connection port of Fig. 1 installed in a rail.
  • FIG. 3 is a section view showing a fuel injector installed in the connection port of Fig. 1. DETAILED DESCRIPTION
  • the rail 100 includes a fluid inlet port 102 for fluidly coupling the rail to a high-pressure fluid pump (not shown).
  • the rail 100 also includes a sensor port 104 for a pressure sensor (not shown).
  • An engine control unit (not show) or other controller can be connected to the pressure sensor to monitor and regulate fluid pressure in the rail 100.
  • the rail 100 defines a longitudinal fluid passageway 106 (see Fig. 3).
  • Removable end caps 108 connect to the ends of the rail 100 to seal the ends of the of the fluid passageway 106.
  • the longitudinal fluid passageway 106 fluidly couples the fluid supply (via the inlet port 102) with the injector ports 120 for supplying high-pressure fluid to drive the fuel injectors 110 (see FIG. 3).
  • Each injector connection port 120 services a respective one of the fuel injectors 1 10.
  • the injector port 120 is configured to mount in vertical passages 121 that extend through the rail 100 at locations that to align with different ones of the fuel injectors 110 when the rail 100 is mounted on the engine (not shown).
  • the vertical passages 121 extend upwardly from the bottom of the rail 100 and intersect the fluid passageway 106.
  • the injector ports 120 are mounted in the vertical passages 121 and are used to interconnect the rail 100 to the fuel injectors 110.
  • Each injector port includes an upper member 123 mountable through the upper end of the vertical passage 121 and a lower member 125 mountable through the lower end of the vertical passage 121 and defining a connection port configured to mate with a reciprocal connector on the fuel injection.
  • the upper and lower members 123, 125 are configured to interconnect with each other to secure the assembly in the vertical passage 121. At least one of the upper and lower members 123, 125 defines a fluid passageway that fluidly interconnects the fluid passageway of the rail with the connection port.
  • the upper member 123 is in the form of a top bolt 128, while the lower member 125 is in the form of a through-tube connector 122.
  • Top and bottom seal washers 124, 26 are interposed between the rail 100 and the top and bottom members 123, 125, respectively.
  • the through-tube connector 122 further includes a connector body 130, a hex plug 132, a seal 134 and a back-up ring 135.
  • the seal 134 fluidly seals between the injector port assembly 120 and a respective fuel injection.
  • the back-up ring 135 provides structural rigidity to the seal 134 and prevents the seal 134 from deforming/extruding between the mating components due to the high pressure of the actuating fluid.
  • the back-up ring may, for example, be rectangular in cross section.
  • the connector body 130 comprises a bottom portion 136 and an elongated tubular portion 138 that extends upwardly from the bottom portion 136.
  • a vertical fluid passageway 140 extends between a bottom opening 142 in the bottom portion 136 and a plurality of top openings 144 (two in the illustrated embodiment) near the upper end of the tubular portion 138.
  • the upper openings 144 intersect the longitudinal fluid passageway 106 to permit fluid flow between the vertical fluid passageway 140 and the longitudinal passageway 106.
  • the hex plug 132 threads into the bottom portion 136 of the connector body 130 and includes a center opening 146 that aligns with the vertical fluid passageway 140 in the connector body 130.
  • the lower end of the vertical passageway 140 and the center opening 146 define a connection port 150 that is configured to mate with a reciprocal connector 151 (see FIG. 3) on a respective fuel injector 1 10 for interconnecting the rail and the fuel injector 1 10.
  • the top bolt 128 inserts through the upper end of the vertical passage 121, where it mates with the through-tube connector 122.
  • the top bolt 128 includes threads 154 that mate with reciprocal threads 156 in the top end of the through-tube connector 122 for securing these components together.
  • the top seal washer 124 is interposed between the top bolt 128 and the top face of the rail 100, while the bottom seal washer
  • the rail 100 includes annular recesses 160 at the top and bottom of the vertical passage 121, which are sized to receive the seal washers 124, 126.
  • the top face of the bottom seal washer 126 includes an annular groove 162, which carries an O-ring seal 164 or other suitable seal.
  • the bottom face of the top seal washer 124 includes an annular groove 166, which carries an O-ring seal 168 or other suitable seal.
  • the rail 100 can be installed on an engine as follows. Initially, each of through-tube connectors 122 is mounted on one of the fuel injectors 1 10 (which have previously be installed in place on the engine) by sliding the connection port 150 onto the connector 151 of a respective injector 110. When the through-tube connector 122 is mounted on the injector, the seals 134, 135 are compressed between the through-tube connector 122 and the injector connector 151 to seal against fluid leaks.
  • the bottom seal washers 126 are then installed on the through-tube connectors 122.
  • the bottom seal washers 126 can be installed on the through-tube connectors 122 before the connectors 122 are installed on to the fuel injectors 1 10.
  • the rail 100 can be lowered into place over the through-tube connectors 122.
  • the vertical passages 121 are larger in diameter than the tubular portions 138 of the connector bodies 130. This clearance 171 makes it easier to install the rail 100 over the through-tube connectors 122.
  • the rail 100 can be secured to the engine block (not shown).
  • the rail 100 has a plurality of coupling lugs 172 (see FIG. 1) for coupling the rail to the engine. This is preferably accomplished by passing a bolt (not shown) through a bore 174 defined in the lug 172 and threading the bolt into a threaded bore (not shown) defined in the engine.
  • top bolts 128 and top seal washers 124 can be installed.
  • the annular recesses 160 are larger in diameter than the top and bottom seal washers 124, 126. This clearance compensates for lateral misalignment and facilitates installation of the top bolt 128, as well as installation of the rail onto the through-tube connectors 122.
  • the seals 164, 168 are compressed between the seal washers 124, 126 and the rail 100 to seal against fluid leakage.
  • the bottom portion 136 of the connector body 130 presents a spherical surface 180 that abuts against a planar bevel 182 formed on the bottom seal washer 126 around its center opening 146.
  • the bottom face of the top bolt 128 presents a spherical surface 184 that abuts against a planar beveled surface 186 formed on the top seal washer 124 around its center opening 146.
  • the injector port 120 can be displaced 2.5 degrees on either side of the axis (or 5 degrees in total).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

La présente invention se rapporte à un ensemble port de connexion d'injecteur de carburant qui couple un injecteur de carburant à un rail qui comprend qui comprend une ingénierie de passage de fluide. Le rail comprend un conduit vertical qui s'étend à travers le rail jusqu'à un emplacement qui s'aligne avec un injecteur de carburant lorsque le rail est monté sur le moteur. Le port de connexion comprend un élément supérieur qui peut être monté à travers l'extrémité supérieure du conduit vertical, et un élément inférieur qui peut être monté à travers l'extrémité inférieure du conduit vertical. L'élément inférieur définit un port de connexion qui se couple à un connecteur réciproque sur l'injecteur. Les éléments supérieur et inférieur s'interconnectent pour fixer l'ensemble dans le conduit vertical. L'élément supérieur et/ou l'élément inférieur définissent un passage de fluide qui assure une communication fluidique entre le passage de fluide du rail et le port de connexion dans l'élément inférieur.
EP11833459.8A 2010-10-16 2011-10-14 Ensemble port de connexion d'injecteur de carburant Withdrawn EP2627892A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US39388410P 2010-10-16 2010-10-16
PCT/US2011/056287 WO2012051494A1 (fr) 2010-10-16 2011-10-14 Ensemble port de connexion d'injecteur de carburant

Publications (1)

Publication Number Publication Date
EP2627892A1 true EP2627892A1 (fr) 2013-08-21

Family

ID=45938725

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11833459.8A Withdrawn EP2627892A1 (fr) 2010-10-16 2011-10-14 Ensemble port de connexion d'injecteur de carburant

Country Status (3)

Country Link
EP (1) EP2627892A1 (fr)
CN (1) CN103228902A (fr)
WO (1) WO2012051494A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3323010A1 (de) * 1983-06-25 1985-01-03 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart Kraftstoffzufuehrungseinrichtung fuer brennkraftmaschinen
US5806494A (en) * 1997-08-06 1998-09-15 Caterpillar Inc. Hydraulically actuated fuel injection system with integrated actuation fluid rail and injectors
CA2384119A1 (fr) * 1999-09-10 2001-03-15 International Engine Intellectual Property Company, Llc Systeme de distribution de fluide d'actionnement pour injecteur de carburant
US6374806B1 (en) * 1999-10-25 2002-04-23 International Truck And Engine Corp. Actuating fluid delivery system for a fuel injector
US7159569B2 (en) * 2005-05-11 2007-01-09 Delphi Technologies, Inc. Fabricated fuel rail assembly for direct injection of fuel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2012051494A1 *

Also Published As

Publication number Publication date
WO2012051494A1 (fr) 2012-04-19
CN103228902A (zh) 2013-07-31

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