EP1719897A1 - Injecteur de carburant - Google Patents

Injecteur de carburant Download PDF

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Publication number
EP1719897A1
EP1719897A1 EP05009617A EP05009617A EP1719897A1 EP 1719897 A1 EP1719897 A1 EP 1719897A1 EP 05009617 A EP05009617 A EP 05009617A EP 05009617 A EP05009617 A EP 05009617A EP 1719897 A1 EP1719897 A1 EP 1719897A1
Authority
EP
European Patent Office
Prior art keywords
memory unit
fluid injector
electronic memory
fluid
injector
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Withdrawn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
EP05009617A
Other languages
German (de)
English (en)
Inventor
Alessandro Morelli
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP05009617A priority Critical patent/EP1719897A1/fr
Publication of EP1719897A1 publication Critical patent/EP1719897A1/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Withdrawn legal-status Critical Current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
    • 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
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
    • F02D41/2464—Characteristics of actuators
    • F02D41/2467—Characteristics of actuators for injectors
    • 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
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2432—Methods of calibration
    • F02D41/2435—Methods of calibration characterised by the writing medium, e.g. bar code
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
    • 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
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/167—Means for compensating clearance or thermal expansion
    • 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
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F02D2041/281—Interface circuits between sensors and control unit
    • F02D2041/285—Interface circuits between sensors and control unit the sensor having a signal processing unit external to the engine control unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2400/00—Control systems adapted for specific engine types; Special features of engine control systems not otherwise provided for; Power supply, connectors or cabling for engine control systems
    • F02D2400/18—Packaging of the electronic circuit in a casing
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8007—Storing data on fuel injection apparatus, e.g. by printing, by using bar codes or EPROMs

Definitions

  • the invention relates to a fluid injector, in particular a fluid injector for metering fuel to a combustion chamber of an internal combustion engine.
  • Fuel injectors are in widespread use, in particular for internal combustion engines where they may be arranged in order to dose the fluid into an intake manifold of the internal combustion engine or directly into the combustion chamber of a cylinder of the internal combustion engine.
  • Fluid injectors are manufactured in various forms in order to satisfy the various needs for the various combustion engines. Therefore, for example, their length, their diameter, and also various elements of the fluid injector being responsible for the way the fluid is dosed may vary greatly.
  • fluid injectors may accommodate an actuator for actuating a needle of the injector, which may for example be an electromagnetic actuator or a piezoelectric actuator.
  • the respective fluid injector may be suited to dose fluid under very high pressures.
  • the pressures may be in case of a gasoline engine, for example, in the range of up to 200 bar and in case of a Diesel engine in the range of up to 2000 bar.
  • the object of the invention is to create a fluid injector, which enables to obtain characteristic information about the specific fluid injector in a simple way.
  • the invention is distinguished by a fluid injector with a body and an electronic memory unit for storing injector-specific data.
  • the electronic memory unit is arranged on the body or is taken in by the body. This has the advantage that specific information about the fluid injector may be stored in the electronic memory unit and then may later be read from the electronic memory unit. This may enable to determine exactly the history of the individual injector, especially when it is returned after a service inspection or in order to determine its characteristics during a service inspection.
  • the specific data may simply be stored on the electronic memory unit during the production process of the fluid injector and is then part of the fluid injector. In this way, it is possible to access all these data directly from the fluid injector without needing to contact the manufacturer and accessing a database of the manufacturer. This also takes away the need for the manufacturer to keep such a database.
  • various information about the fluid injector may be stored such as a production number, a production site, a production date or time, for example, in a Julian date format, assembly line parameters, a test line production date and parameters, injector calibration information, a shipping date, or an installation date. It may, however, also comprise other information.
  • the body comprises a first body with a recess.
  • the body further comprises a needle that obstructs injection of fluid in its closing position and otherwise enables fluid injection.
  • the body further comprises a second body being arranged and formed in a way to at least in part cover the first body.
  • the electronic memory unit is arranged on the second body or is taken in by the second body. In this way, the fluid conduction and fluid dosing is separated from the second body. This enables to choose an appropriate material for accommodating the electronic memory unit in respect of ease of manufacturing, a thermal heat transfer, and electromagnetic compatability.
  • the second body comprises plastics. In this way, the second body can simply be brought in shape to accommodate the electronic memory unit.
  • the second body is molded. It is then simple to manufacture in respect of accommodating the electronic memory unit and enables in a simple way to seal and cover the electronic memory unit to protect it from any environmental influence.
  • the second body comprises a connector comprising at least one terminal for electrically connecting the injector and the electronic memory unit is electrically connected to at least one terminal of the connector. In this way, simple access for reading information from the electronic memory unit is possible.
  • the electronic memory unit is arranged in an area of a second body with a high thickness. This enables to subject the electronic memory unit to less heat peaks.
  • a fluid injector that is embodied as a fuel injector, that is suitable for injecting fuel into a gasoline engine or that may also be suitable for injecting fuel in a Diesel engine, comprises a housing 1, a valve body 2 and an actuator unit 3.
  • the fuel injector is preferably located in a cylinder head of an internal combustion engine and provides a combustion chamber with fuel.
  • the housing 1 may comprise a fluid duct 10 to lead the fuel to a valve body 2.
  • the valve body 2 comprises a cartridge 21 with a recess 23 and a needle 22 that is inserted into the recess 23 and is guided in an area of a guide formed in the recess 23.
  • the needle 22 is of an outward opening type but it may also be of an inward opening type.
  • the needle 22 is pushed in its closing position by a return spring 24, which rests on a spring washer that is connected to the needle. The return spring 24 exerts a force on the needle 22 in the closing direction of the needle 22.
  • the actuator unit 3 is inserted into the housing 1.
  • the actuator unit 3 is contacted mechanically on one of its axial ends by a thermal compensator 4 and the other axial end is coupled to the needle 22.
  • the actuator unit 3 is formed in this embodiment of the fluid injector as a piezoelectric actuator unit. It may, however, also be formed as any other kind of actuator unit being suitable for actuating a fluid injector, such as an electromagnetic actuator. Depending on actuating signals, the actuator unit 3 changes its axial length and in that way pushes the needle 22 away from its closing position or leaves it in its closing position.
  • a first body is formed by the housing 1, the valve body 2, a cartridge 21, and the needle 22.
  • the first body may, however, also comprise just one or more of the above elements. It may also be formed as a single part apart from the needle 22.
  • a second body 5 is arranged and formed in a way to at least in part cover the first body.
  • the second body 5 may comprise a connector 51 with at least one terminal 52 for connecting the actuator unit 3 with an electronic control unit.
  • the electronic memory unit 53 is arranged on the second body 5 or is taken in by the second body 5, as shown in FIG. 1.
  • the electronic memory unit 53 comprises electronic memory for storing data.
  • it is of a type of memory that may be written once and after that be only read. That way, it may be a read-only memory, for example, being formed as an EPROM.
  • Various data may be stored in the electronic memory unit 53 characterizing the individual fluid injector.
  • This data may, for example, be a production number, an assembly line site identifier, an assembly line production date and parameters, a test line production date and parameters, an injector calibration information, a shipping date and installation date. It may also comprise other information.
  • the dates may preferably be stored in a Julian date way. For example, it may comprise information about dynamic and/or static characteristics of the fluid injector. In this way, a high degree of traceability is given, enabling, for example, in a simple way to determine where the fluid injector was manufactured or assembled.
  • the electronic memory unit 53 is extremely well protected against environmental influences such as dirt or aggressive fluids, if it is fully covered by the second body 5 as shown in FIG. 1.
  • the second body 5 preferably comprises plastics and is in addition to that preferably molded.
  • the electronic memory unit 53 is preferably electrically connected to at least one terminal 52 of the connector 51. This enables in an easy way to read out data from the electronic memory unit 53. Alternatively, the electronic memory unit 53 may be provided with means to read out the information stored in the electronic memory unit 53 by way of inductive or capacitive coupling.
  • the electronic memory unit 53 may also be arranged on the second body 5, that is on the outer surface of the second body 5, as is shown by way of example in FIG. 2.
  • the second body 5 also takes in a coil 55 being part of an electromagnetic actuator forming the actuator of the fluid injector.
  • the electronic memory unit 53 may also be designed to selectively add or reduce resistance to the coil 55 in order to switch from high to low impedance or vice-versa.
  • the electronic memory unit 53 may either be taken in by the second body 5 or also be arranged on the second body 5. In both cases, also the second body 53 and the first body form a body. The body may also comprise just parts of the first and/or second body 5.
  • the electronic memory unit 53 is preferably located in or on the second body 5 on a location with a high thickness of the second body 5. This enables together with the suitable choice of material that the electronic memory unit 53 is subjected to less heat peaks.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)
EP05009617A 2005-05-02 2005-05-02 Injecteur de carburant Withdrawn EP1719897A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05009617A EP1719897A1 (fr) 2005-05-02 2005-05-02 Injecteur de carburant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05009617A EP1719897A1 (fr) 2005-05-02 2005-05-02 Injecteur de carburant

Publications (1)

Publication Number Publication Date
EP1719897A1 true EP1719897A1 (fr) 2006-11-08

Family

ID=34936050

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05009617A Withdrawn EP1719897A1 (fr) 2005-05-02 2005-05-02 Injecteur de carburant

Country Status (1)

Country Link
EP (1) EP1719897A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1826386A1 (fr) * 2006-02-24 2007-08-29 Beru Aktiengesellschaft Moteur à combustion pour véhicule, en particulier moteurs diesel
WO2008128499A1 (fr) * 2007-04-24 2008-10-30 Thomas Magnete Gmbh Élément d'actionnement électromagnétique
US11002267B2 (en) 2016-08-12 2021-05-11 Artemis Intelligent Power Limited Valve for fluid working machine, fluid working machine and method of operation

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4487181A (en) * 1982-04-03 1984-12-11 Lucas Industries Public Limited Company Fuel supply system for an internal combustion engine
WO1997023717A1 (fr) * 1995-12-22 1997-07-03 Siemens Automotive Corporation Utilisation de la technologie eeprom pour rattacher des donnees relatives aux performances a un injecteur de carburant
WO2004086158A1 (fr) * 2003-03-22 2004-10-07 Robert Bosch Gmbh Soupape d'injection de carburant et systeme a combustion interne

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4487181A (en) * 1982-04-03 1984-12-11 Lucas Industries Public Limited Company Fuel supply system for an internal combustion engine
WO1997023717A1 (fr) * 1995-12-22 1997-07-03 Siemens Automotive Corporation Utilisation de la technologie eeprom pour rattacher des donnees relatives aux performances a un injecteur de carburant
WO2004086158A1 (fr) * 2003-03-22 2004-10-07 Robert Bosch Gmbh Soupape d'injection de carburant et systeme a combustion interne

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1826386A1 (fr) * 2006-02-24 2007-08-29 Beru Aktiengesellschaft Moteur à combustion pour véhicule, en particulier moteurs diesel
US8036819B2 (en) 2006-02-24 2011-10-11 Beru Aktiengesellschaft Internal combustion engine for vehicles, in particular a diesel engine
WO2008128499A1 (fr) * 2007-04-24 2008-10-30 Thomas Magnete Gmbh Élément d'actionnement électromagnétique
US11002267B2 (en) 2016-08-12 2021-05-11 Artemis Intelligent Power Limited Valve for fluid working machine, fluid working machine and method of operation

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