EP0249313B1 - Brennstoff-Einspritzvorrichtung - Google Patents

Brennstoff-Einspritzvorrichtung Download PDF

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Publication number
EP0249313B1
EP0249313B1 EP87303128A EP87303128A EP0249313B1 EP 0249313 B1 EP0249313 B1 EP 0249313B1 EP 87303128 A EP87303128 A EP 87303128A EP 87303128 A EP87303128 A EP 87303128A EP 0249313 B1 EP0249313 B1 EP 0249313B1
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EP
European Patent Office
Prior art keywords
fuel
valve
fuel discharge
discharge passage
passage means
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
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EP87303128A
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English (en)
French (fr)
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EP0249313A3 (en
EP0249313A2 (de
Inventor
Ernest Richard Stettner
Donald Dibble Stoltman
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Motors Liquidation Co
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Motors Liquidation Co
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Publication date
Application filed by Motors Liquidation Co filed Critical Motors Liquidation Co
Priority to AT87303128T priority Critical patent/ATE73903T1/de
Publication of EP0249313A2 publication Critical patent/EP0249313A2/de
Publication of EP0249313A3 publication Critical patent/EP0249313A3/en
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Publication of EP0249313B1 publication Critical patent/EP0249313B1/de
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    • 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
    • F02M69/50—Arrangement of fuel distributors, e.g. with means for supplying equal portion of metered fuel to 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/02—Fuel-injection apparatus characterised by being operated electrically specially for low-pressure fuel-injection
    • 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
    • F02M69/08—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by the fuel being carried by compressed air into main stream of combustion-air

Definitions

  • This invention relates to a fuel injection apparatus for a multi-cylinder internal combustion engine in which a plurality of injection nozzles discharge fuel adjacent the inlet ports of the engine and a single fuel injector meters the fuel to all of the injection nozzles, as, for example, disclosed in US-A-4,570,598.
  • Throttle body fuel injection apparatus employ one or two fuel injectors that deliver the fuel into the air flowing through the engine throttle body, and the mixture of air and fuel then flows through the engine inlet manifold to the inlet ports of the engine combustion chambers.
  • Port fuel injection apparatus typically employ individual fuel injectors to deliver fuel directly to each of the inlet ports.
  • a throttle body fuel injection apparatus with only one or two fuel injectors has a cost advantage over a port fuel injection apparatus with its several fuel injectors and the associated fuel rails.
  • port fuel injection apparatus offer advantages in engine operation. Those comparative advantages present incentive for a fuel injection apparatus in which a single fuel injector meters fuel and a plurality of injection nozzles deliver the fuel to the engine inlet ports.
  • This invention permits a fuel injection apparatus to deliver fuel through a plurality of injection nozzles directly to the inlet ports and to employ a single fuel injector to meter the fuel to all of the injection nozzles.
  • a fuel injector in accordance with the present invention is characterised over US-A-4,570,598 by the features specified in the characterising portion of Claim 1.
  • a single fuel injector meters fuel through an annular region into a cylindrical chamber defined between a bore in the injector base and a plug received in the bore, and a plurality of fuel discharge passages open from the cylindrical chamber to direct fuel to injection nozzles.
  • a solenoid operated valve in the fuel injector may meter fuel to the fuel discharge passages with very little motion.
  • a fuel injector meters fuel through an annular region to a plurality of fuel discharge passages that direct the fuel to injection nozzles, and the fuel injector includes a valve member with an aperture opening into the centre of the annular region.
  • a single fuel injector meters fuel to a plurality of fuel discharge passages that direct the fuel to injection nozzles, and a rectifier valve allows air to flow into the fuel discharge passages when the fuel injector is not metering fuel into the fuel discharge passages.
  • the fuel maintains its discharge velocity through the fuel discharge passages to the injection nozzles.
  • This feature also reduces the propagation of pressure waves through the fuel discharge passages as the fuel injector initiates and terminates fuel flow into the fuel discharge passages.
  • a fuel injector has a base with a plurality of fuel discharge passages that receive the ends of fuel discharge lines through which fuel is directed to injection nozzles, the injector base has an air inlet surrounding the ends of the fuel discharge lines, and air lines surround the fuel discharge lines and direct air to the injection nozzles.
  • the fuel discharge lines are thermally insulated.
  • a single fuel injector l0 receives fuel from a source of fuel at a desired pressure and meters fuel into six fuel discharge lines l2.
  • Each fuel discharge line l2 leads to an injection nozzle l4 that delivers the metered fuel into the stream of air flowing through one of the inlet manifold runners l6 and one of the inlet ports l8 to one of the combustion chambers 20 of a six cylinder engine 2l.
  • Fuel injector l0 has a housing 22 with a fuel inlet port 24 and an excess fuel outlet port 26 that establish a path for fuel flow through housing 22. Housing 22 is secured to an injector base 28. A valve member 30 which is solenoid operated controls fuel flow from housing 22 through an annular region 32 of injector base 28 to six fuel discharge passages 34 that receive fuel discharge lines l2.
  • Injector base 28 has a central bore 36 and includes a plug 38 received in central bore 36 to define a cylindrical fuel distribution chamber 40 between plug 38 and central bore 36.
  • the upper portion of plug 38 has a hexagonal configuration, the points 44 of which engage central bore 36 to divide cylindrical fuel distribution chamber 40 into six sectors 46. Each sector 46 opens into one of the fuel discharge passages 34.
  • the surface 48a surrounding central bore 36 and the surface 48b at the perimeter of plug 38 form an annular valve surface bounding annular region 32.
  • a spring 50 biases valve member 30 into engagement with surfaces 48a,b to interrupt fuel flow through annular region 32.
  • a solenoid coil 52 lifts valve member 30 against the bias of spring 50 to permit fuel flow through annular region 32 and the sectors 46 of cylindrical fuel distribution chamber 40 to fuel discharge passages 34 and fuel discharge lines l2.
  • valve member 30 When valve member 30 is lifted from surfaces 48a,b, fuel flows through a cylindrical area between valve member 30 and surface 48a. That cylindrical area is determined both by the radius of central bore 36 and by the height to which valve member 30 is lifted above surfaces 48a,b. As the radius of central bore 36 is increased, the height to which valve member 30 must be lifted may be decreased without restricting fuel flow into annular region 32.
  • plug 38 By using plug 38 to form the fuel flow region as an annular region 32 and to form the fuel distribution chamber as a cylindrical fuel distribution chamber 40, the radius is increased without increasing the desired area for the fuel flow region and the desired volume for the fuel distribution chamber.
  • the use of an annular fuel flow region accordingly reduces the motion of the valve member 30 as it is lifted by solenoid coil 52.
  • valve member 30 has an aperture 54 opening from housing 22 to a space 56 beneath valve member 30 within surface 48b.
  • fuel flows into annular region 32 both around valve member 30 and through aperture 54 and space 56. It will be understood, therefore, that the clearance required between valve member 30 and surface 48a is less with aperture 54 providing a path for fuel flow between valve member 30 and surface 48b into annular region 32 than would be required if it were necessary for all fuel flow into annular region 32 to pass around valve member 30 and between valve member 30 and surface 48a.
  • Fuel injector l0 is controlled to meter fuel in a conventional manner by energizing solenoid coil 52 with a pulse width modulated current. As the pulse width is increased, valve member 30 is lifted for an increased length of time to increase the duration of fuel flow into fuel discharge lines l2.
  • Plug 38 has a recess 58 open to the atmosphere and six ports 60 opening slightly downwardly from recess 58 into the sectors 46 of cylindrical fuel distribution chamber 40.
  • a hollow valve seat member 62 is received in recess 58 and has a valve seat 64 which is upwardly facing.
  • a rectifier valve disc 66 of lightweight Mylar rests on valve seat 64. Recess 58, valve seat 64 and rectifier valve disc 66 define air valve means.
  • Injector base 28 has a larger recess 68 open to the atmosphere and six air passages 70 surrounding fuel discharge lines l2. Air passages 70 receive air lines 72 that are disposed concentrically about fuel discharge lines l2.
  • Each injection nozzle l4 has a fluted insert 74 with a tapered tip 76 engaged in the end of fuel discharge line l2 and a tapered base 78 engaged in the end of air line 72.
  • Fluted insert 74 aligns fuel discharge line l2 within air line 72, and its flutes 80 deliver the fuel and air into the stream of air flowing through the inlet manifold runner l6.
  • the atmospheric pressure in larger recess 68 induces air to flow through air lines 72 to the subatmospheric pressure in the inlet ports l8, and the atmospheric pressure in recess 58 induces air to flow past rectifier valve disc 66 and through ports 60, sectors 46 of cylindrical fuel distribution chamber 40, and fuel discharge passages 34 and fuel discharge lines l2 to the subatmospheric pressure in inlet ports l8.
  • solenoid coil 52 lifts valve member 30 and fuel flows through annular region 32 into the sectors 46 of cylindrical fuel distribution chamber 40, the increased pressure in cylindrical fuel distribution chamber 40 stops air flow through ports 60 from recess 58 and engages rectifier valve disc 66 with its valve seat 64.
  • solenoid coil 52 When solenoid coil 52 is deenergized and spring 50 engages valve member 30 against surfaces 48a,b, air will again be induced to flow from recess 58 past rectifier valve disc 66 and through ports 60, sectors 46 of cylindrical fuel distribution chamber 40, and fuel discharge passages 34 and fuel discharge lines l2.
  • Air flow through the sectors 46 of cylindrical fuel distribution chamber 40 and the fuel discharge passages 34 and fuel discharge lines l2 allows the inertia of the fuel to maintain its discharge velocity, and reduces propagation of pressure waves through fuel discharge lines l2 as valve member 30 is lifted from and engaged with surfaces 48a,b.
  • Such air flow also provides a source of air at substantially atmospheric pressure immediately below valve member 30, thereby providing an essentially constant pressure in the annular region 32 to which valve member 30 delivers fuel.
  • Fuel discharge passages 34 open from the bottom of sectors 46, while ports 60 open slightly downwardly into the upper portion of sectors 46. With this construction, it is thought that fuel flow through sectors 46 past ports 60 will create a suction tending to assist in quickly lifting rectifier valve disc 66 from its valve seat 64.
  • Air flow through air lines 72 thermally insulates fuel discharge lines l2, and provides a source of air at substantially atmospheric pressure at the tip of injection nozzles l4 where the fuel is introduced into the stream of air flowing through the inlet ports l8.
  • injection nozzle l4 is proportioned so that the vacuum in a zone 82 within air line 72 at the end of fuel discharge line l2 is about l0% of the vacuum in the intake port l8 at the end of the injection nozzle l4 (that is, the difference between the pressure in zone 82 and the atmospheric pressure is about l0% of the difference between the pressure in intake port l8 and the atmospheric pressure).
  • fuel discharge line l2 is formed of tubing with a 0.864mm (0.034in) inside diameter and a l.60 mm (0.063in) outside diameter
  • air line 72 is formed of tubing with a 2.36mm (0.093in) inside diameter and a 3.00mm (0.ll8in) outside diameter.
  • Other parts are sized accordingly.
  • a single fuel injector 310 receives fuel from a source of fuel at a desired pressure and meters fuel into six fuel discharge lines 312.
  • Each fuel discharge line 3l2 leads to an injection nozzle that delivers the metered fuel into the stream of air flowing through one of the inlet manifold runners and one of the inlet ports to one of the combustion chambers of a six cylinder engine.
  • Fuel injector 3l0 has a housing 322a with a fuel inlet port 324a and an excess fuel outlet port that establish a path for fuel flow through housing 322a.
  • Housing 322a is secured to an injector base 328.
  • a valve member 330a which is solenoid operated controls fuel flow from housing 322a through an annular region 332a of injector base 328 to six fuel discharge passages 334a that extend to fuel discharge lines 3l2.
  • Annular region 332a includes a surface 348a.
  • a spring 350a biases valve member 330a into engagement with surface 348a to interrupt fuel flow through annular region 332a.
  • a solenoid coil 352a lifts or retracts valve member 330a against the bias of spring 350a to permit fuel flow through annular region 332a to fuel discharge passages 334a and fuel discharge lines 3l2.
  • Fuel injector 3l0 also has a housing 322b with an air inlet port 324b. Housing 322b is secured to injector base 328. A valve member 330b which is solenoid operated controls air flow from housing 322b through an annular region 332b of injector base 328 to six air discharge passages 334b that extend to fuel discharge lines 3l2.
  • Annular region 332b includes a surface 348b.
  • a spring 350b biases valve member 330b into engagement with surface 348b to interrupt air flow through annular region 332b.
  • a solenoid coil 352b retracts valve member 330b against the bias of spring 350b to permit air flow through annular region 332b to air discharge passages 334b and fuel discharge lines 3l2.
  • Annular region 332b, surface 348b, valve member 330b and solenoid coil 352b define air valve means.
  • valve members 330a,b To reduce the motion of valve members 330a,b as they are retracted by solenoid coils 352a,b, valve members 330a,b have apertures 354a,b opening from housings 322a,b to the centre of annular regions 332a,b. Thus when valve members 330a,b, are retracted by solenoid coils 352a,b, fuel and air flow into annular regions 332a,b both around valve members 330a,b and through apertures 354a,b.
  • valve members 330a,b and surfaces 348a,b are less with apertures 354a,b providing paths for fuel and air flow between valve members 330a,b and surfaces 348a,b into annular regions 332a,b than would be required if it were necessary for all fuel and air flow into annular regions 332a,b to pass around valve members 330a,b.
  • Fuel injector 3l0 is in other respects similar to fuel injector l0, and further details of construction are set forth in US patent 4572436 and will not be repeated here.
  • solenoid coils 352a,b are energized alternately.
  • solenoid coil 352b When solenoid coil 352b is energized, the pressure in housing 322b induces air to flow through air discharge passages 334b and fuel discharge lines 3l2 to the subatmospheric pressure in the inlet ports.
  • solenoid coil 352a When solenoid coil 352a is energized, fuel flows through annular region 332a to fuel discharge passages 334a and fuel discharge lines 3l2.
  • Air flow through the fuel discharge lines 3l2 allows the inertia of the fuel to maintain its discharge velocity, and reduces propagation of pressure waves through fuel discharge lines 3l2 as valve member 330a is lifted from and engaged with surface 348a. Such air flow also creates an essentially constant pressure in the annular region 332a to which valve member 330a delivers fuel.
  • a single fuel injector 6l0 receives fuel from a source of fuel at a desired pressure and meters fuel into six fuel discharge lines 6l2.
  • Each fuel discharge line 6l2 leads to an injection nozzle 6l4 that delivers the metered fuel into the stream of air flowing through one of the inlet manifold runners 6l6 and one of the inlet ports 6l8 to one of the combustion chambers 620 of a six cylinder engine 62l.
  • Fuel injector 6l0 has a housing 622 with a fuel inlet port 624 and an excess fuel outlet port 626 that establish a path for fuel flow through housing 622. Housing 622 is secured to an injector base 628. A valve member 630 which is solenoid operated controls fuel flow from housing 622 through an annular region 632 of injector base 628 to six fuel discharge passages 634 that extend to fuel discharge lines 6l2.
  • Annular region 632 includes a surface 648.
  • a spring 650 biases valve member 630 into engagement with surface 648 to interrupt fuel flow through annular region 632.
  • a solenoid coil 652 lifts valve member 630 against the bias of spring 650 to permit fuel flow through annular region 632 to fuel discharge passages 634 and fuel discharge lines 6l2.
  • valve member 630 has an aperture 654 opening from housing 622 to the centre of annular region 632.
  • fuel flows into annular region 632 both around valve member 630 and through aperture 654. It will be understood, therefore, that the clearance required between valve member 630 and surface 648 is less with aperture 654 providing a path for fuel flow between valve member 630 and surface 648 into annular region 632 than would be required if it were necessary for all fuel flow into annular region 632 to pass around valve member 630 and between valve member 630 and surface 648.
  • Fuel injector 6l0 is in other respects similar to fuel injector l0, and further details of construction are set forth in US patent 4572436 and will not be repeated here.
  • Each fuel discharge line 6l2 terminates in an orifice 679 in an injection nozzle 6l4.
  • Each injection nozzle 6l4 has an air line 672 opening from the atmosphere and terminating in an orifice 68l. Injection nozzles 6l4 deliver the fuel and air into the stream of air flowing through the inlet ports 6l8.
  • the atmospheric pressure induces air to flow through air lines 672 to the subatmospheric pressure in the inlet ports 6l8.
  • solenoid coil 652 When solenoid coil 652 is energized, fuel flows through annular region 632 to fuel discharge passages 634 and fuel discharge lines 6l2.
  • Air flow through air lines 672 provides a source of air at substantially atmospheric pressure at the tip of injector nozzles 6l4 where the fuel is introduced into the stream of air flowing through the inlet ports 6l8.
  • fuel discharge line 7l2 and air line 772 terminate in injection nozzle 7l4.
  • injection nozzle 7l4 the open end 775 of each air line 772 is reduced, and the open end of each fuel line 7l2 is spaced from the open end 775 of the associated air line 772.
  • Each fuel line 7l2 is formed with a helically coiled section 783 that embraces the inner wall 785 of the associated air line 772 to support the fuel discharge line 7l2 within the air line 772.
  • fuel discharge line 7l2 is formed of tubing with a 0.864mm (0.034in) inside diameter and a l.57mm (0.062in) outside diameter
  • air line 772 is formed of tubing with a 3.05mm (0.l20in) inside diameter and a 3.96mm (0.l56in) outside diameter
  • the helically coiled section 783 has a free overall diameter of at least 3.l8mm (0.l25in) to assure that it will be compressively engaged with the inside wall 785 of the air line 772.
  • each air line 772 is reduced to an inside diameter of l.4mm (0.055in) over a length of l.02mm (0.04in), and the spacing between the end of the fuel discharge line 7l2 and the open end 775 of the air line 772 is adjusted for the desired fuel spray characteristic.
  • Injection nozzles 7l4 may be employed to directly replace injection nozzles l4 in the Figure l embodiment.
  • the fuel injector shown in figure 2 is mounted in the top of an inlet manifold plenum with the terminals for the solenoid coil projecting outside and the concentric fuel and air lines extending inside the manifold through the manifold plenum and runners to injection nozzles 7l4.
  • Such a construction presents an improved appearance and protects the concentric fuel and air lines against damage, while still allowing injection nozzles 7l4 to deliver metered fuel into the stream of air flowing through the inlet ports to the engine combustion chambers.
  • an air supply line must extend from a source of clean air to the base of the fuel injector.

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

Claims (9)

  1. Treibstoff-Injektor (10, 310, 610) zum Zumessen von Treibstoff zu einer vielzahl von Einspritzdüsen (14, 614), welcher Treibstoff-Injektor umfaßt ein Grundteil (28, 328, 628) mit einer Ventiloberfläche (48, 348a, 648) und eine Vielzahl von Treibstoffauslaß-Durchlaßmitteln (34, 46, 334a, 634), von denen jedes Treibstoffauslaß-Durchlaßmittel einrichtbar ist, Treibstoff zu einer der Einspritzdüsen zu richten, ein einzelnes, der Ventilfläche zugeordnetes Ventilglied (30, 330a, 630), welches Ventilglied ausgelegt ist, an der Ventilfläche anzuliegen, um Treibstoffzulieferung zu dem Treibstoffauslaß-Durchlaßmittel auszuschließen, und einen Magneten (52, 352a, 652), der ausgelegt ist, das Ventilglied von der Ventilfläche abzuheben, um Treibstoffzulieferung zu dem Treibstoffauslaß-Durchlaßmittel zuzulassen, dadurch gekennzeichnet, daß die Ventilfläche (48, 348a, 648) planar ist, daß das Treibstoffauslaß-Durchlaßmittel (34, 46, 334a, 634) sich durch die planare Ventilfläche öffnet und daß jedes Treibstoffauslaß-Durchlaßmittel eine separaten und gesonderten Durchlaß für Treibstoffstrom von der planaren Ventilfläche zu seiner jeweiligen Einspritzdüse bildet.
  2. Treibstoff-Injektor (10) nach Anspruch 1, der weiter umfaßt Luftventilmittel (58, 64, 66) zum Steuern von Luftstrom zu jedem Treibstoffauslaß-Durchlaßmittel (34, 46) und ausgelegt, Luftstrom zu dem Treibstoffauslaß-Durchlaßmittel zu unterbinden, wenn das Ventilglied volle Lieferung zu dem Treibstoffauslaß-Durchlaßmittel zuläßt, und Luft zu dem Treibstoffauslaß-Durchlaßmittel zuzulassen, wenn das Ventilmittel Treibstoffzulieferung zu dem Treibstoffauslaß-Durchlaßmittel ausschließt.
  3. Treibstoff-Injektor nach Anspruch 2, bei dem das Luftventilmittel eine Öffnung (58) in dem Injektor-Grundteil (28) umfaßt, durch welche Luft zu jedem TreibstoffauslaßDurchlaßmittel (34, 46) strömen kann, einen die Öffnung umgebenden Ventilsitz (64) und ein dem ventilsitz zugeordnetes Rückschlagventil 866), welches Rückschlagventil auf Druck anspricht und dadurch ausgelegt ist, sich an den ventilsitz anzulegen, um Luftströmung durch die Öffnung auszuschließen, wenn das Ventilglied (30) Treibstoffzulieferung zu dem Treibstoffauslaß-Durchlaßmittel zuläßt, und sich vom ventilsitz zu lösen, um Luft zu dem Treibstoffauslaß-Durchlaßmittel zuzulassen, wenn das Ventilglied Treibstoffzulieferung zu dem Treibstoffauslaß-Durchlaßmittel ausschließt.
  4. Treibstoff-Injektor nach Anspruch 3, bei dem das Rückschlagventil ein Scheiben-Rückschlagventil (66) ist.
  5. Treibstoff-Injektor nach Anspruch 2, bei dem das Luftventilmittel einen zusätzlichen Ringbereich (332b) in dem Injektor-Grundteil (328) umfaßt, durch welchen Luft zu dem Treibstoffauslaß-Durchlaßmittel fließt, wobei der zusätzliche Ringbereich enthält eine zusätzliche Ventilfläche (348b), ein zusätzliches einzelnes, zu der zusätzlichen Ventilfläche gehöriges Ventilglied (330b), wobei das zusätzliche Ventilglied ausgelegt ist, sich an die zusätzliche Ventilfläche anzulegen, um Luftströmung zu dem Treibstoffauslaß-Durchlaßmittel auszuschließen, und einen zusätzlichen Magneten (352), der dazu ausgelegt ist, das zusätzliche Ventilglied von der zusätzlichen Ventilfläche abzuheben, um Luftströmung zu dem Treibstoffauslaß-Durchlaßmittel zuzulassen.
  6. Treibstoff-Injektor nach einem der Ansprüche 1 bis 5, der weiter umfaßt eine vielzahl von Treibstoffauslaß-Leitungen (12), die jeweils mit einem Ende an dem Treibstoffauslaß-Durchlaßmittel (34) angeschlossen sind und sich zu Einspritzdüsen (14) am anderen Ende erstrecken, wobei das Injektor-Grundteil (32) weiter besitzt einen ein Ende jeder Treibstoffauslaß-Leitung umgebenden Lufteinlaß (68, 70) und eine vielzahl von Luftleitungen (72), die an einem Ende mit dem Lufteinlaß verbunden sind, jeweils die Treibstoffauslaß-Leitungen umgeben und sich zu den Einspritzdüsen am anderen Ende erstrecken.
  7. Treibstoff-Injektor nach einem der Ansprüche 1 bis 6, bei dem das Injektor-Grundteil (28) eine Zentralbohrung (36) besitzt und einen in der Zentralbohrung aufgenommenen Stopfen (38) enthält, um eine Treibstoff-Verteilungskammer (40) zwischen dem Stopfen und der Zentralbohrung zu bestimmen, wobei die Ventilfläche (48) einen die Zentralbohrung umgebenden ersten Abschnitt (48a) und einen zweiten Abschnitt (48b) am Umfang des Stopfens enthält, der Stopfen (48) an der Zentralbohrung (36) an in Umfangsrichtung mit Abstand vorhandenen Stellen (44) anliegt, um die Treibstoff-Verteilungskammer (40) in eine vielzahl von Sektoren (46) zu unterteilen, jedes TreibstoffauslaßDurchlaßmittel einen der Sektoren und einen Treibstoffdurchlaß-Auslaß (34) umfaßt, der von einem der Sektoren abgeht.
  8. Treibstoff-Injektor nach einem der Ansprüche 1 bis 7, bei dem das Ventilglied (30) einen sich durch dieses öffnenden Durchbruch (54) besitzt, um einen Treibstoffströmungsweg zu dem Treibstoffauslaß-Durchlaßmittel (34, 46) zu schaffen, wenn das Ventilglied von der Ventilfläche (48) abgehoben ist.
  9. Treibstoff-Injektor nach einem der Ansprüche 1 bis 8, bei dem das Ventilglied einen sich von seiner Außenkante zu seiner der Ventilfläche (48) benachbarten Innenkante verjüngenden Querschnitt besitzt, wobei die Außenkante dikker als die Innenkante ist.
EP87303128A 1986-05-02 1987-04-10 Brennstoff-Einspritzvorrichtung Expired - Lifetime EP0249313B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87303128T ATE73903T1 (de) 1986-05-02 1987-04-10 Brennstoff-einspritzvorrichtung.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US85901486A 1986-05-02 1986-05-02
US859014 1986-05-02
US1029687A 1987-02-02 1987-02-02
US10296 1998-01-21

Publications (3)

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EP0249313A2 EP0249313A2 (de) 1987-12-16
EP0249313A3 EP0249313A3 (en) 1989-11-15
EP0249313B1 true EP0249313B1 (de) 1992-03-18

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EP87303128A Expired - Lifetime EP0249313B1 (de) 1986-05-02 1987-04-10 Brennstoff-Einspritzvorrichtung

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EP (1) EP0249313B1 (de)
BR (1) BR8702114A (de)
CA (1) CA1292651C (de)
DE (1) DE3777454D1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4958773A (en) * 1980-06-21 1990-09-25 General Motors Corporation Fuel injection
US4909220A (en) * 1987-08-03 1990-03-20 General Motors Corporation Fuel injection
DE3841088A1 (de) * 1988-12-07 1990-06-21 Mesenich Gerhard Kraftstoffeinspritzvorrichtung mit luftunterstuetzter kraftstoffzerstaeubung
US5207205A (en) * 1988-12-07 1993-05-04 Siemens Automotive L.P. Fuel injection device with air-assisted fuel diffusion
US4958774A (en) * 1989-06-21 1990-09-25 General Motors Corporation Fuel injection
US5101800A (en) * 1990-12-07 1992-04-07 General Motors Corporation Fuel injection

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4572436A (en) * 1984-12-24 1986-02-25 General Motors Corporation Electromagnetic fuel injector with tapered armature/valve
DE4033644C1 (en) * 1990-10-23 1992-04-30 Maschinenfabrik Alfred Schmermund Gmbh & Co, 5820 Gevelsberg, De Cigarette group forming machine - incorporates accumulator with outlet guide system

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2623786A (en) * 1948-10-01 1952-12-30 Rudolf L Wille Method for atomizing fuel and nozzle for carrying out this method
US2957682A (en) * 1957-05-13 1960-10-25 Holley Carburetor Co Fuel system
GB1270945A (en) * 1968-07-04 1972-04-19 Lucas Industries Ltd Improvements in fuel injection systems for internal combustion engines
JPS6056908B2 (ja) * 1978-11-06 1985-12-12 株式会社日立製作所 燃料噴射装置のための燃料制御装置
DE3033644A1 (de) * 1980-09-06 1982-04-29 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzanlage
US4465050A (en) * 1981-05-19 1984-08-14 Nippon Soken, Inc. Device for atomizing the fuel for an internal-combustion engine
JPS58155269A (ja) * 1981-12-31 1983-09-14 オ−ビタル・エンジン・カンパニイ・プロプライエタリ・リミテイツド エンジンにガス圧により液体燃料を供給する方法及びその装置
JPS59131575U (ja) * 1983-02-23 1984-09-04 トヨタ自動車株式会社 電子制御機関用燃料噴射弁
IN160390B (de) * 1983-05-19 1987-07-11 Wisdom Shirley A
DE3320469A1 (de) * 1983-06-07 1984-12-13 Volkswagenwerk Ag, 3180 Wolfsburg Vorrichtung zur verteilung einer zweiphasenstroemung
EP0163198B1 (de) * 1984-05-29 1987-11-11 Volkswagen Aktiengesellschaft Verfahren zur kontinuierlichen Kraftstoffeinspritzung und Einrichtung zur Durchführung des Verfahrens
US4570598A (en) * 1985-04-15 1986-02-18 Ford Motor Company Air assist fuel distributor type fuel injection system
GB2175952B (en) * 1985-05-24 1989-02-01 Orbital Eng Pty Improvements relating to fuel injection systems

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4572436A (en) * 1984-12-24 1986-02-25 General Motors Corporation Electromagnetic fuel injector with tapered armature/valve
DE4033644C1 (en) * 1990-10-23 1992-04-30 Maschinenfabrik Alfred Schmermund Gmbh & Co, 5820 Gevelsberg, De Cigarette group forming machine - incorporates accumulator with outlet guide system

Also Published As

Publication number Publication date
EP0249313A3 (en) 1989-11-15
DE3777454D1 (de) 1992-04-23
BR8702114A (pt) 1988-02-09
CA1292651C (en) 1991-12-03
EP0249313A2 (de) 1987-12-16

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