WO1994029589A1 - Injecteur de carburant a detection de position - Google Patents

Injecteur de carburant a detection de position Download PDF

Info

Publication number
WO1994029589A1
WO1994029589A1 PCT/AU1994/000320 AU9400320W WO9429589A1 WO 1994029589 A1 WO1994029589 A1 WO 1994029589A1 AU 9400320 W AU9400320 W AU 9400320W WO 9429589 A1 WO9429589 A1 WO 9429589A1
Authority
WO
WIPO (PCT)
Prior art keywords
needle
nozzle
register device
position register
injector
Prior art date
Application number
PCT/AU1994/000320
Other languages
English (en)
Inventor
Sergi Yudanov
Original Assignee
Invent Engineering Pty. Limited
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 Invent Engineering Pty. Limited filed Critical Invent Engineering Pty. Limited
Priority to AU69658/94A priority Critical patent/AU6965894A/en
Publication of WO1994029589A1 publication Critical patent/WO1994029589A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
    • F02D41/28—Interface circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/3005—Details not otherwise provided for
    • 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
    • F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
    • F02M65/005—Measuring or detecting injection-valve lift, e.g. to determine injection timing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/063—Lift of the valve needle

Definitions

  • the present invention relates to means and apparatus for sensing the position of the needle within the nozzle of a fuel injector for an internal combustion engine.
  • an electrical conductor is utilised to transfer a signal giving information about the position of the needle, the path of which is from the needle configuration to the position register device and through the injector body and to the output to the engine management system.
  • the electrical conductor is connected with the needle configuration which entails both a complicated design and one which is prone to leakage of compressed fuel from the locking chamber, especially when a unit injector and/or spring-hydraulically locked nozzle is used. The higher the pressure of the fluid the more extreme the problem.
  • the purpose of the present invention is to overcome one or more of the problems outlined above.
  • the present invention provides a fuel injector adapted for connection to a position register device, the fuel injector comprising a first electrically conductive body containing an orifice for flow of injector fluid and a second electrically conductive body adjacent thereto, an electrically insulating layer between said first and second bodies, a reciprocating electrically conductive needle movable within at least one of said first and second bodies for opening and closing a nozzle of the injector, said position register device being adapted for electrical connection to said first body, and wherein said second body and position register device are each adapted to be connected to a source of equal potential, further wherein said first and second bodies are electrically open circuited when said needle opens said nozzle and wherein said first and second bodies are electrically connected when the needle closes said nozzle.
  • the invention provides a fuel injector adapted for connection to a position register device, the fuel injector comprising a first electrically conductive body and a second electrically conductive body adjacent thereto, an electrically insulating layer between said first and second bodies, a reciprocating electrically conductive needle movable within said first and second bodies for opening and closing of a nozzle of the injector, said position register device being adapted for electrical connection to said first body, and wherein said second body and position register device are each adapted to be connected to a source of equal potential, further wherein said first and second bodies are electrically open-circuited when the needle is at or between positions closing and partially opening said nozzle, and wherein said first and second bodies are electrically connected when the needle more than partially opens said nozzle.
  • the invention consists in a fuel injector adapted for connection to a position register device, the fuel injector comprising a first electrically conductive body and a second electrically conductive body adjacent thereto, an electrically insulating layer between said first and second bodies, a reciprocating electrically conductive needle movable within said first and second bodies for opening and closing of a nozzle of the injector, said position register device being adapted for electrical connection to said first body, and wherein said second body and position register device are both adapted to be connected to a source of equal potential, an electrical position sensing device disposed between said first body and said needle and being electrically or electro-magnetically coupled to said first body and said needle, and wherein said needle is electrically connected to said second body, and further wherein an electrical characteristic of the position sensing device varies as said needle moves within said first and second bodies to provide a signal representative of the position of the needle relative to the nozzle, and wherein said position register device is adapted to detect said varying electrical characteristic.
  • the present invention provides a system for detecting the opening or closing or degree of opening of a fuel injector as described in any one of the preceding forms of the invention comprising a position register device for registering the position of the needle relative to the injector nozzle, said position register device being electrically connected to the first body of the injector, and the position register device and the second body being connected to a source of equal electrical potential.
  • Figure 1 depicts a cross-sectional view of a prior art fuel injector of US 4,398,670 incorporating a register device for sensing the position of the needle within the nozzle;
  • Figures 2, 3 and 4 depict cross-sectional views of embodiments of fuel injectors with register devices for sensing the position of the needle within the nozzle in accord with the present invention
  • Figure 5 shows an example of the design of a fuel injector as shown in PCT/US91/09680 where the present invention can be applied and where the prior art arrangement of the sensing apparatus of Fig. 1 is not practical due to the complicated design;
  • Figure 6 is a cross-sectional view of an embodiment of an alternate form of the invention in which the injector of Fig. 1 has been modified to include a sensing device as shown in Fig. 4;
  • Figure 7 is a similar view to Fig. 6 but including the sensing device of Fig. 3.
  • a suitable position register device 2 that can be adapted for use is the HALTECH® E6 engine management system which is protected by United States and other patents. Throughout the drawings like components are referenced with the same reference numeral.
  • a prior art fuel injector 1 is electrically connected to a position register device 2 by means of a conductor 14 and connector 5, the position register device 2 also being connected to earth.
  • the connector 5 is attached to conductor 13 which passes through the first body 6 into locking chamber 7 of the nozzle and is electrically connected to spring 8 which exerts a force on reciprocating needle 9.
  • the second body 4 and the nozzle 3 are connected to earth.
  • needle 9 opens the aperture of nozzle 3 the needle 9 and nozzle 3 become electrically disconnected due to the insulating layer 10 between their cylindrical guiding surfaces.
  • the register device 2 registers the change in electrical resistance as the nozzle opens and closes.
  • Figs 2-7 are fuel injectors (coupled to position register devices) which ameliorate the problems of the prior art.
  • a fuel injector 20 is connected to a position register device 2 by means of a conductor 14 attached to first body 6 by means of electrical connector 5.
  • the locking chamber 7 of nozzle 3 is contained within first body 6.
  • the locking chamber 7 contains a spring 8 which exerts a force on needle 9 and ensures an electrical connection between the first body 6 and the nozzle's needle 9.
  • Needle 9 passes through nozzle 3 and there is an insulating layer 10 between the guiding surfaces of needle 9 and nozzle 3 which is contained within the second body 4.
  • the nozzle 3 and second body 4 are insulated from the first body 6 by an electrical insulating layer 12.
  • the first body 6 is also insulated from the fuel inlet connection by electrical insulating layer 15.
  • the first body 6 is electrically insulated from all components which have an electrical contact with earth (an example being a unit injector with a mechanical drive from a cam in which case the first body is electrically insulated from the cam and the fuel line coming from the pump) .
  • the second body 4, which is connected to nozzle 3, and the position register device 2 are each connected to a source of equal electrical potential, preferably earth.
  • a source of equal electrical potential preferably earth.
  • the injector 30 is identical to that shown in Fig. 2 except that there is no insulating layer between the guiding surfaces of nozzle 3 and needle 9, the spring 8 which exerts a force on the needle 9, is electrically insulated from the first body 6 and/or needle 9, and the locking chamber 7 also contains a sensing spring 16 having an uncompressed length such that when needle 9 is in its lowest or nozzle closing position, or close to this position, the sensing spring 16 cannot touch both needle 9 and first body 6 at the same time, so that first body 6 and second body 4 are not electrically connected.
  • the advantage of the sensor device as shown in Fig. 3, as compared to the sensor device shown in Fig. 2, is that there is no need to insulate the needle 9 from the nozzle 3.
  • the sensor device of injector 40 similarly positioned is identical to that depicted in Fig. 3 except that, in lieu of spring 16, a sensing device 17 is used which is in constant electrical or electromagnetic connection with needle 9 and first body 6 and whilst it is acted upon by the movement of reciprocating needle 9 its electrical characteristics, such as resistance, capacitance, or inductance are changed.
  • the signal conveying information regarding the change in electrical characteristics is conducted through the path of conductor 14 to connector 5 to first body 6 to sensing device 17 to needle 9 to second body 4 to the engine management system and by this means it is possible to determine the position of the nozzle's needle at any time.
  • Fig. 5 depicts an injector 50 as disclosed in PCT/US91/09680 modified to conform to the requirements of the present invention as depicted in Fig. 4 and wherein like components are numbered as for Fig. 4.
  • Figs. 6 and 7 show injectors 60 and 70, respectively, which are based on Fig. 1 but in both cases the insulation 10 of Fig. 1 has been omitted as it is not required in view of insulation 12.
  • spring 8 is insulated from needle 9 to electrically isolate conductor 13 from needle 9 as conductor 13 transmits a signal relating to the varying characteristic sensed by sensing device 17 of Fig. 6 or sensing spring 16 of Fig. 7

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un injecteur (20, 30, 40, 50) de carburant adapté pour faciliter le contrôle de l'ouverture ou de la fermeture, ou du degré d'ouverture de sa buse (3) d'injection par isolation électrique (12) du corps (6) d'injecteur de sa buse (3), et détection électrique ou électromagnétique de l'ouverture ou de la fermeture, ou du degré d'ouverture de l'aiguille (9) contre la sortie (11) de la buse.
PCT/AU1994/000320 1993-06-15 1994-06-15 Injecteur de carburant a detection de position WO1994029589A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU69658/94A AU6965894A (en) 1993-06-15 1994-06-15 Fuel injector adapted for position sensing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPL9389 1993-06-15
AUPL938993 1993-06-15

Publications (1)

Publication Number Publication Date
WO1994029589A1 true WO1994029589A1 (fr) 1994-12-22

Family

ID=3776972

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1994/000320 WO1994029589A1 (fr) 1993-06-15 1994-06-15 Injecteur de carburant a detection de position

Country Status (1)

Country Link
WO (1) WO1994029589A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2320522A (en) * 1996-12-18 1998-06-24 Daimler Benz Ag Device for determining the opening and closing times of a valve, eg i.c. engin inlet valve or fuel-injection valve
WO2002016757A1 (fr) * 2000-08-21 2002-02-28 Volvo Lastvagnar Ab Dispositif detecteur de la position d'une aiguille
DE19830667C2 (de) * 1998-07-09 2002-10-31 Daimler Chrysler Ag Vorrichtung zur Bestimmung der Öffnungs- und Schließzeitpunkte eines Gaswechselventiles
WO2004085826A1 (fr) * 2003-03-26 2004-10-07 Siemens Aktiengesellschaft Dispositif de contact d'un injecteur d'un systeme d'injection destine a l'injection de carburant et injecteur equipe de ce dispositif de contact
DE10359673B4 (de) * 2003-12-18 2008-01-17 Siemens Ag Sensor zur Hubmessung an einer Ventilnadel relativ zu einem Ventilgehäuse und Betriebsverfahren
WO2017072081A1 (fr) * 2015-10-29 2017-05-04 Delphi International Operations Luxembourg S.À R.L. Injecteur de carburant
JP2017524864A (ja) * 2014-07-22 2017-08-31 デルフィ・インターナショナル・オペレーションズ・ルクセンブルク・エス・アー・エール・エル 燃料噴射器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942366A (en) * 1973-02-02 1976-03-09 Robert Bosch Gmbh Fuel injection arrangement
US4181010A (en) * 1978-06-29 1980-01-01 General Motors Corporation Injection timing nozzle
US4398670A (en) * 1980-08-06 1983-08-16 Robert Bosch Gmbh Fuel injection valve for an internal combustion engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942366A (en) * 1973-02-02 1976-03-09 Robert Bosch Gmbh Fuel injection arrangement
US4181010A (en) * 1978-06-29 1980-01-01 General Motors Corporation Injection timing nozzle
US4398670A (en) * 1980-08-06 1983-08-16 Robert Bosch Gmbh Fuel injection valve for an internal combustion engine

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2320522A (en) * 1996-12-18 1998-06-24 Daimler Benz Ag Device for determining the opening and closing times of a valve, eg i.c. engin inlet valve or fuel-injection valve
DE19830667C2 (de) * 1998-07-09 2002-10-31 Daimler Chrysler Ag Vorrichtung zur Bestimmung der Öffnungs- und Schließzeitpunkte eines Gaswechselventiles
WO2002016757A1 (fr) * 2000-08-21 2002-02-28 Volvo Lastvagnar Ab Dispositif detecteur de la position d'une aiguille
US6691936B2 (en) 2000-08-21 2004-02-17 Volvo Lastvagnar Ab Needle position sensing device
JP2004507645A (ja) * 2000-08-21 2004-03-11 ボルボ　ラストバグナー　アーベー ニードル位置検出装置
WO2004085826A1 (fr) * 2003-03-26 2004-10-07 Siemens Aktiengesellschaft Dispositif de contact d'un injecteur d'un systeme d'injection destine a l'injection de carburant et injecteur equipe de ce dispositif de contact
DE10359673B4 (de) * 2003-12-18 2008-01-17 Siemens Ag Sensor zur Hubmessung an einer Ventilnadel relativ zu einem Ventilgehäuse und Betriebsverfahren
JP2017524864A (ja) * 2014-07-22 2017-08-31 デルフィ・インターナショナル・オペレーションズ・ルクセンブルク・エス・アー・エール・エル 燃料噴射器
WO2017072081A1 (fr) * 2015-10-29 2017-05-04 Delphi International Operations Luxembourg S.À R.L. Injecteur de carburant
FR3043144A1 (fr) * 2015-10-29 2017-05-05 Delphi Int Operations Luxembourg Sarl Injecteur de carburant

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