EP0465613A1 - Systeme d'injection de carburant pour moteurs a combustion interne. - Google Patents

Systeme d'injection de carburant pour moteurs a combustion interne.

Info

Publication number
EP0465613A1
EP0465613A1 EP19910901681 EP91901681A EP0465613A1 EP 0465613 A1 EP0465613 A1 EP 0465613A1 EP 19910901681 EP19910901681 EP 19910901681 EP 91901681 A EP91901681 A EP 91901681A EP 0465613 A1 EP0465613 A1 EP 0465613A1
Authority
EP
European Patent Office
Prior art keywords
plug
fuel injection
fuel
plastic housing
sockets
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.)
Granted
Application number
EP19910901681
Other languages
German (de)
English (en)
Other versions
EP0465613B1 (fr
Inventor
Udo Hafner
Ferdinand Reiter
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
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0465613A1 publication Critical patent/EP0465613A1/fr
Application granted granted Critical
Publication of EP0465613B1 publication Critical patent/EP0465613B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
    • F02M69/044—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into the intake conduit downstream of an air throttle valve
    • 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 injection system for internal combustion engines of the type defined in the preamble of claim 1.
  • the electromagnetically controlled fuel injection valves are controlled by an electronic control unit as a function of operating parameters of the internal combustion engine, such as the amount of intake air, load, temperature, etc., which cause the fuel injection amount to be metered accordingly.
  • the electrical connections connected to the electromagnets of the fuel injection valves are to be connected to the control unit in the form of plug-in elements which protrude from the valve housing.
  • the individual fuel injection valves are electrically contacted after insertion into the connecting pieces of the fuel distributor by individuals
  • a fuel injection system with a fuel distributor and fuel injection valves of the so-called side-feed type is already known (DE 37 30 571 AI), in which the fuel injection valves are used in stepped receiving bores in a base body, which are open in the axial direction and with the distributor channel stay in contact.
  • the two electrical plug-in elements per fuel injection valve for connecting the electromagnet to the control unit are arranged on each fuel injection valve on the end face of the valve housing opposite the injection mouthpiece and project there axially from the valve housing. All fuel injection valves are fixed on the one hand in the receiving bores by a plastic contact strip placed on and attached to the base body and on the other hand electrically contacted, for which purpose the contact strip has a number of integrated electrical plugs corresponding to the number of fuel injection valves.
  • the plugs are connected individually via electrical connecting lines running in the contact strip to a connector plug which is arranged on the side of the contact strip and via which the individual fuel injection valves on the control unit be connected.
  • This constructive design of the fuel injection system has the advantage that both the assembly time on the internal combustion engine is significantly reduced, and savings in material costs are achieved by eliminating many individual plugs, cables, clamps, and others.
  • the base body, together with the fuel injectors that are mechanically held and electrically contacted by means of the contacting strip forms a compact structural unit that enables a functional test and tightness test and immediate assembly on the intake pipes of the internal combustion engine in an unchanged state compared to the test.
  • the fuel injection system according to the invention with the characterizing features of claim 1 has the advantage that even in fuel injection systems with so-called top-feed valves, in which the plug-in elements protrude laterally from the valve housing because of the fuel supply at the end, fuel distributors and fuel injection valves are combined into a compact unit which can be finally checked for function, direction of radiation and tightness and, after testing, can be installed on the internal combustion engine immediately and without changing the test status.
  • the assembly effort on site is thus significantly less.
  • With the simultaneous electrical contacting of the plug-in elements when the fuel injection valves are inserted into the fuel distributor the fuel injection valves are mechanically fixed against radial rotation.
  • the fuel injection valves can therefore no longer twist after being inserted and checked during assembly on the internal combustion engine, so that the set jet direction of the injection jet is reliably maintained. This is especially for Multi-jet injection valves of essential importance, the direction of the jet must be precisely adjusted and reliably observed.
  • the direct integration of the connector in the plastic housing of the fuel distributor not only replaces a separate plastic rail, but also speeds up the assembly process, since the insertion of the fuel injector in the connecting piece goes hand in hand with the production of the electrical connector.
  • Fig. 1 is a perspective view of a
  • FIG. 2 shows a cross section of the fuel distributor in FIG. 1 with a schematically indicated intake pipe of the internal combustion engine
  • Fig. 3 shows a section along the line III-III in Fi. 2, shown enlarged.
  • FIG. 4 shows a partial side view of a fuel distributor according to a further exemplary embodiment
  • 5 shows a detail of a bottom view of the fuel distributor in FIG. 4,
  • FIG. 6 shows a section along the line VI-VI in FIG. 1 with fuel injection valves used in the fuel distributor
  • Fig. 7 is the same representation as in Fig. 6 of a modified fuel distributor.
  • the fuel injection system for an internal combustion engine shown only partially in Fig. 1 has a fuel dispenser 10, in whose plastic housing 11 a distribution channel 12 is formed, which at the ends of the plastic housing 11 in a connecting mouthpiece 13 for the fuel inlet and in a connecting mouthpiece 14 for the Fuel outflow opens.
  • the connection mouthpiece 13 is a
  • Fuel supply line connected to a fuel pump (not shown) that delivers fuel from a fuel tank.
  • the mouthpiece 14 is connected to the fuel tank via a return line, also not shown.
  • a pressure regulating valve 15 is arranged between the connecting mouthpiece 14 and the mouth of the distributor channel 12 in the connecting mouthpiece 14 and regulates the fuel pressure in the distributor channel 12 to a predetermined value.
  • the plastic housing 11 carries four on its underside
  • Connection piece 16 which are each connected to the distribution channel 12 via an orifice 17 (FIG. 2).
  • the number of connecting pieces 16 corresponds to the number of combustion cylinders of the internal combustion engine.
  • the fuel injection system also has - corresponding to the number of combustion cylinders of the internal combustion engine - four fuel injection valves 18 of the so-called top-feec type.
  • Each of these electromagnetically actuated fuel injection valves 18 has a valve housing 19 with an inlet connection 20 formed at one end, which has a fuel inlet opening opening at its free end. With this inlet connection 20, each fuel injection valve 18 is inserted in a connection stub 16 on the underside of the fuel distributor 10 in a liquid-tight manner, the fuel inlet opening in the inlet connection 20 via the opening 17 in the
  • Connection piece 16 is connected to the distribution channel 12.
  • Fuel injection valves 18 each have an electromagnet (not shown here), the power supply of which is provided via two electrical plug-in elements 21, 22 ' which project laterally on the valve housing 19 near the inlet connector 20. As shown in Fig. 2 and 3, 21-22 show the plug-in elements have a rectangular cross section and are summarized in a fastened to the valve housing 19 connector receptacle "23.
  • the plug receptacle 23 is formed in an angle-shaped plastic part 24 which encloses a portion of the inlet fitting 20
  • the plug receptacle 23 is integrated on the end face in the angled area of the plastic cable 24, with a collar 25 which is integral with the plastic part 24 and which protrudes from the angled section of the plastic part 24 and extends parallel to the valve axis 21,22 surrounds at a distance and protrudes axially beyond this.
  • each two sockets 26,27 are spatially assigned to a connecting piece 16 so that when Insert the inlet connector 20 one
  • FIGS. 2 and 3 it can be seen are two jacks 26,27 to a one-piece with the.
  • This cover 29 which is integral with the plastic housing 11, surrounds the underside of the plastic housing 11 transversely to the axis of the Fuel distributor 10 protruding connector sockets 26,27 at a distance and protrudes beyond the end of the connector sockets 26,27, the distance being selected so that when the plug elements 21, 22 penetrate into the connector sockets 26, 27, the collar 25 of the connector receptacle 23 between them Can insert plug sockets 26, 27 and hood 29.
  • the positive connection between plug elements 21, 22 and plug sockets 26, 27 on the one hand and de r Form-fit between the collar 25 and hood 29 on the other hand ensure that each
  • Fuel injection valve 18 can only be used in a certain rotational position in the associated connecting piece 16 of the fuel distributor 10 and, after insertion, a radial rotation of the fuel injection valve 18 used is reliably prevented.
  • the direction of the fuel injection jet, once set, with respect to the axis of the fuel injection valve 18 is thus fixed in an unchangeable manner.
  • Plastic housing 11 of the fuel distributor 10 connected electrical connection cable connected to a multi-pin connector 30 which is .an attached to one end of the plastic housing 11. Only one of the individual connecting cables is shown in FIG. 2 To see connecting cable 31, which leads to the one socket 26.
  • the electronic control unit for controlling the fuel injection valves 18 is connected via a multi-core cable. There are two ways of controlling the fuel injection valves 18. In the first case, each fuel injection valve 18 is individually controlled by the control electronics, so that a corresponding number of electrical control lines are routed between the control device and the four fuel injection valves 18 via the connector 30. In the second case, all fuel injection valves 18 are activated simultaneously. This means that only two electrical control lines are required.
  • the fuel distributor 10 with the fuel injection valves 18 inserted therein can be mounted on the internal combustion engine as a completely prefabricated and final-checked unit, the injection ports 32 of the fuel injection valves 18 each protruding into an intake pipe 33 of the internal combustion engine, as is shown schematically in FIG. 2.
  • FIG. 6 another embodiment of a fuel rail 110 is shown.
  • the distribution channel 112 (FIG. 6) is in turn formed in the plastic housing 111 and communicates with a plurality of connecting pieces 116 via outlet openings 117.
  • the rotationally symmetrical connecting pieces 116 are integrally formed on the elongated box-shaped plastic housing 111 and protrude on the underside thereof (FIGS. 4 and 5).
  • Ears 134 formed on the plastic housing 111 with fastening holes 135 serve to fasten the completely pre-assembled fuel distributor 110 to the internal combustion engine. In each connector 116 are close to the.
  • Insert opening 136 for the inlet connection 120 of the fuel injection valves 118 is provided with two diametrically arranged pockets 137, 138, which run through the connection piece 116 and the plastic housing 111 and are open towards the top of the plastic housing 111 facing away from the connection piece 116.
  • the pockets 137, 138 are each provided with a slot 139, 140, which is designed in such a way that an electrical plug element 121 and 122, respectively
  • Fuel injection valve 118 can pass through.
  • a plug socket 126, 127 is inserted coaxially to the slot 139 or 140 in each pocket 137 or 138 and is secured against axial displacement in the lower part of the pocket by a catch.
  • the connector socket 126 or 127 has on one rear side a spring tongue 141 or 142 which engages behind a latching lug 143 or 144 in the pocket 137, 138.
  • the end of the plug socket 126 or 127 facing away from the slot 139 or 140 is connected to a connecting line 145 or 146 which, like the connecting cable 31 in FIG. 2, leads to a connector provided laterally on the plastic housing 111.
  • each catch 148 consists of two opposing catch ribs 149, 150 which project from lateral webs 168, 169 of the cover rail 147 projecting into the pockets 137, 138 and each have an insertion bevel 151 and a catch projection 152 in the usual manner. With this locking projection 152, the locking ribs 149, 150 engage behind corresponding projections 153 on the opposite pocket wall.
  • For splash water protection is in each longitudinal web
  • a groove 154 is provided, .n which each contains a seal 155.
  • Each connecting piece 116 carries at its end having the insertion opening 136 for the inlet connection 120 of the fuel injection valves 118 an axially projecting locking collar 156 for mechanically locking the fuel injection valve 118 inserted into the insertion opening 136.
  • each electromagnetic fuel injection valve 118 of the so-called top feed type has a valve housing 119 with an inlet connection 12C formed at the end, which ends at its free end
  • a plastic hood 158 which coaxially surrounds the inlet connection 120 with a hub-like projection 161 and which carries a radially projecting locking flange 159, is firmly attached to the front end of the valve housing 119.
  • the two plug-in elements 121, 122 emerge freely from the annular surface 160 of the locking flange 159 facing the inlet connection 120 and extend diametrically to one another parallel to and at a distance from the inlet connection 120.
  • Plug element 121, 122 is, as usual, electrically conductively connected to a winding end of an excitation winding of an electromagnet for valve actuation.
  • Projection 161 of the plastic hood 158 is inserted into the insertion opening 136 in the connecting socket 116, the two plug elements 121, 122 passing through the slots 139, 140 in the annular surface 162 surrounding the insertion opening 136 on the connecting piece 116 and inserting into the associated plug sockets 126, 127.
  • the snap collar 156 snaps behind the locking flange 159 and secures this through the Plug-in elements 121, 122 and sockets 126, 127 rotatably held in the connecting piece 116 Kraf fuel injection valve 118 against unwanted axial displacement.
  • For splash water protection is between the ring surface 160 on the locking flange 159 and the ring surface 162
  • Connection piece 116 inserted an annular flat seal 163.
  • An O-ring seal 164 ° located on the end face of the hub-like projection 161 of the plastic hood 158 and surrounding the inlet connection 120, prevents fuel from escaping from the connection connection 116.
  • a filter basket 165 is inserted in each inlet connection 120 to protect the fuel injection valves 113 from dirt particles in the fuel.
  • the modified 5 fuel distributor 110 'shown in cross section in FIG. 7 differs from the fuel distributor 110 shown in FIG. 6 and described above only in that a filter channel 166 is arranged parallel to the distributor channel 112, in which a filter 167 is interchangeably inserted. This eliminates a 0 d s onset of filter baskets 165 in each

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

Un système d'injection de carburant pour moteurs à combustion interne présente plusieurs soupapes d'injection de carburant (18) du type à injection par le haut et un distributeur de carburant (10) qui comporte un canal de distribution (12) formé dans un carter en matière plastique (11) et des raccords (16) destinés à recevoir chacun une tubulure d'alimentation (20) à l'entrée d'une soupape d'injection (18). Pour simplifier la fabrication et le montage et pour protéger les soupapes d'injection (18) contre les torsions radiales, on intègre, dans le carter en matière plastique (11) du distributeur de carburant (10), des prises électriques (26, 27) destinées à recevoir les fiches électriques (21, 22) correspondantes des soupapes d'injection (18). Deux des prises (26, 27) sont associées à chacun des raccords (16) de telle manière que lorsqu'on pousse la soupape d'injection (18) dans les raccords (16), les fiches (21, 22) pénètrent simultanément dans les prises (26, 27) correspondantes. Toutes les prises (26, 27) sont reliées électriquement par une prise de raccordement multipolaire (30) disposée sur le distributeur de carburant (10) et à laquelle est raccordé l'appareil électronique de commande qui commande les soupapes d'injection (18).
EP91901681A 1990-01-27 1991-01-10 Systeme d'injection de carburant pour moteurs a combustion interne Expired - Lifetime EP0465613B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4002393A DE4002393A1 (de) 1990-01-27 1990-01-27 Kraftstoffeinspritzsystem fuer brennkraftmaschinen
DE4002393 1990-01-27

Publications (2)

Publication Number Publication Date
EP0465613A1 true EP0465613A1 (fr) 1992-01-15
EP0465613B1 EP0465613B1 (fr) 1994-03-23

Family

ID=6398896

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91901681A Expired - Lifetime EP0465613B1 (fr) 1990-01-27 1991-01-10 Systeme d'injection de carburant pour moteurs a combustion interne

Country Status (8)

Country Link
US (1) US5203304A (fr)
EP (1) EP0465613B1 (fr)
JP (1) JP3150692B2 (fr)
KR (1) KR100195819B1 (fr)
BR (1) BR9105240A (fr)
DE (2) DE4002393A1 (fr)
ES (1) ES2051585T3 (fr)
WO (1) WO1991011608A1 (fr)

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DE4111988C2 (de) * 1991-04-12 1994-07-14 Bosch Gmbh Robert Brennstoffverteiler
DE4118512A1 (de) * 1991-06-06 1992-12-10 Bosch Gmbh Robert Elektrisch betaetigbares brennstoffeinspritzventil und verfahren zu dessen elektrischer kontaktierung
DE4131537A1 (de) * 1991-09-21 1993-04-01 Bosch Gmbh Robert Brennstoffverteiler
US5363825A (en) * 1993-01-27 1994-11-15 Volkswagen Ag Fuel injection arrangement for an internal combustion engine having a plurality of electric fuel injection valves
US5301647A (en) * 1993-06-14 1994-04-12 Siemens Automotive L.P. Fuel injector attachment clip
DE4332118A1 (de) * 1993-09-22 1995-03-23 Bosch Gmbh Robert Brennstoffeinspritzvorrichtung
US5568798A (en) * 1995-06-08 1996-10-29 Siemens Automotive Corporation Plastic fuel rail having integrated electrical wiring
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US5785022A (en) * 1997-05-28 1998-07-28 Epic Technical Group, Inc. Fuel injector post
DE19732063B4 (de) * 1997-07-25 2006-03-16 Audi Ag Vorrichtung zum Einsetzen von Einspritzventilen
US6053148A (en) * 1998-02-21 2000-04-25 Ford Motor Company Intake manifold for an internal combustion engine
US6408827B1 (en) * 1999-11-12 2002-06-25 Siemens Automotive Corporation Stamped fuel rail with integrated mounting brackets
DE10012834A1 (de) 2000-03-16 2001-09-27 Bayerische Motoren Werke Ag Kapsel für ein Einspritzsystem
EP1150002B1 (fr) 2000-04-26 2003-07-09 Ford Global Technologies, Inc., A subsidiary of Ford Motor Company Système d'injection de carburant pour moteurs à combustion interne
JP4217941B2 (ja) * 2000-12-08 2009-02-04 株式会社デンソー 燃料噴射装置及びその調整方法
US6418912B1 (en) 2000-12-18 2002-07-16 Siemens Automotive Corporation HPDI injector and packaging
US6783336B2 (en) * 2002-06-28 2004-08-31 Visteon Global Technologies, Inc. Fuel sender assembly
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FR2890793B1 (fr) * 2005-09-15 2007-12-07 Eaton Sam Sa Monegasque Dispositif de raccordement d'un connecteur a un solenoide de pilotage d'un injecteur
JP2010138828A (ja) * 2008-12-12 2010-06-24 Nikki Co Ltd Ｌｐｇインジェクタ及びｌｐｇ噴射装置
DE102013216836A1 (de) * 2013-08-23 2015-02-26 Continental Automotive Gmbh Stellantrieb zur Betätigung eines Einspritzventils und Einspritzventil
DE102013217538A1 (de) * 2013-09-03 2015-03-05 Robert Bosch Gmbh Haltevorrichtung zur Befestigung eines Brennstoffverteilers an einer Brennkraftmaschine
EP3184793A1 (fr) * 2015-12-21 2017-06-28 Continental Automotive GmbH Injecteur long pour injection de carburant dans un moteur à combustion interne

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Also Published As

Publication number Publication date
DE4002393A1 (de) 1991-08-01
EP0465613B1 (fr) 1994-03-23
KR100195819B1 (en) 1999-06-15
BR9105240A (pt) 1992-08-04
DE59101223D1 (de) 1994-04-28
JPH04505202A (ja) 1992-09-10
JP3150692B2 (ja) 2001-03-26
KR920701661A (ko) 1992-08-12
US5203304A (en) 1993-04-20
ES2051585T3 (es) 1994-06-16
WO1991011608A1 (fr) 1991-08-08

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