EP1397592A1 - Injecteur comportant un piezo-actionneur - Google Patents

Injecteur comportant un piezo-actionneur

Info

Publication number
EP1397592A1
EP1397592A1 EP02767152A EP02767152A EP1397592A1 EP 1397592 A1 EP1397592 A1 EP 1397592A1 EP 02767152 A EP02767152 A EP 02767152A EP 02767152 A EP02767152 A EP 02767152A EP 1397592 A1 EP1397592 A1 EP 1397592A1
Authority
EP
European Patent Office
Prior art keywords
injector
piezo actuator
piezo
control valve
determined
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
EP02767152A
Other languages
German (de)
English (en)
Other versions
EP1397592B1 (fr
Inventor
Werner Remmels
Arne Schneemann
Bernd Danckert
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.)
Rolls Royce Solutions GmbH
Original Assignee
MTU Friedrichshafen 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 MTU Friedrichshafen GmbH filed Critical MTU Friedrichshafen GmbH
Publication of EP1397592A1 publication Critical patent/EP1397592A1/fr
Application granted granted Critical
Publication of EP1397592B1 publication Critical patent/EP1397592B1/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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/005—Fuel-injectors combined or associated with other devices the devices being sensors
    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • 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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
    • F02D2041/2055—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit with means for determining actual opening or closing time
    • 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
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D41/2096—Output circuits, e.g. for controlling currents in command coils for controlling piezoelectric 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements
    • 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
    • F02M2200/24—Fuel-injection apparatus with sensors
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
    • F02M59/468—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means using piezoelectric 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
    • 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

Definitions

  • the invention relates to an injector for an injection system of an internal combustion engine, which has a piezo actuator, a control valve, a nozzle needle and a detection means for detecting the presence or opening of the piezo actuator on the control valve.
  • the injector with piezo actuator shown therein also has a detection means. This consists of an electrical contact and a compensator circuit. The electrical contact is created by the contact surfaces of the piezo actuator and the control valve. When the piezo actuator is in contact with the control valve, a closed circuit is created from the piezo actuator / control valve to the compensator circuit.
  • the problem with this solution is the isolation of the piezo actuator within the injector and the changing contact resistance due to deposits.
  • the object of the invention is to determine the opening and closing times more reliably in the case of an injector with a piezo actuator.
  • the detection means comprises a piezo element. This is preferably integrated in the piezo actuator. One element of the piezo actuator is therefore used for force measurement.
  • a gap is provided between the piezo actuator and the control valve. Changes in length of the piezo actuator Due to the temperature, the injector does not necessarily open.
  • the presence / opening of the piezo actuator is recognized by the fact that a measurement voltage applied to the piezo element exceeds a limit value.
  • the measured voltage determined is then set as decisive for the further control of the injector.
  • a weighted measurement voltage is determined from a predeterminable number of determined measurement voltages and this is set as decisive for the further control of the injector.
  • the invention offers the advantage of a corresponding durability of the injector. Due to the precise, reproducible knowledge of the opening behavior of the injector, cylinder-specific regulation of the injection is possible. As a follow-up reaction, the torque contributions and the peak pressure of the individual cylinders can be adjusted to one another.
  • Figure 1 is a sectional view of the injector
  • Figure 2 is a schematic diagram for the mechanical translation
  • the injector 1 shows a sectional view of an injector.
  • the general function of the injector is assumed to be known in the following.
  • the injector 1 consists of a base body 7, a nozzle 5 and a union nut 6.
  • a nozzle needle 9 is arranged inside the nozzle 5.
  • a piezo actuator 2 and a control valve 8 with a valve body 10 are located within the base body 7.
  • the state of the nozzle needle 9, that is to say the injection time and the injection quantity, is determined via the electrical actuation of the piezo actuator.
  • a piezo element 3 of the piezo actuator 2 is used here
  • a measurement voltage Um of the piezo element 3 is evaluated by an electronic control unit (EDC) 4.
  • EDC electronice control unit
  • the level of the measurement voltage Um changes. If the measurement voltage exceeds a limit value, this is recognized by the electronic control unit 4. This measuring voltage is then set as decisive for the further control of the injector.
  • a weighted measuring voltage is determined from a predeterminable number of determined measuring voltages. This can e.g. B. arithmetic averaging. The weighted measuring voltage is then used as decisive for the further operation of the injector.
  • FIG 2 shows a schematic diagram for a mechanical translation in the injector 1.
  • the mechanical translation is exemplified as a lever 11 with sections A and B.
  • a valve 13 is opened against the force of a closing device 12.
  • the pressure level p of the fuel is present at the valve 13.
  • the lever 1 1 is shown in dashed lines in the open position.
  • the piezo actuator 2 is deactivated, the valve 13 is closed again via the closing device 12.
  • the use of a mechanical translation offers the advantage that the piezo actuator can be made shorter.
  • the injector is securely closed via the locking device 12 even if the electronic control fails.
  • the invention offers the advantage that it is easy to carry out.
  • the wear-free determination of the application of the piezo actuator is a corresponding one

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
EP02767152A 2001-06-20 2002-06-18 Injecteur comportant un piezo-actionneur Expired - Lifetime EP1397592B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10129375A DE10129375B4 (de) 2001-06-20 2001-06-20 Injektor mit Piezo-Aktuator
DE10129375 2001-06-20
PCT/EP2002/006678 WO2003001049A1 (fr) 2001-06-20 2002-06-18 Injecteur comportant un piezo-actionneur

Publications (2)

Publication Number Publication Date
EP1397592A1 true EP1397592A1 (fr) 2004-03-17
EP1397592B1 EP1397592B1 (fr) 2004-12-01

Family

ID=7688588

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02767152A Expired - Lifetime EP1397592B1 (fr) 2001-06-20 2002-06-18 Injecteur comportant un piezo-actionneur

Country Status (5)

Country Link
US (1) US20040149840A1 (fr)
EP (1) EP1397592B1 (fr)
AT (1) ATE283974T1 (fr)
DE (2) DE10129375B4 (fr)
WO (1) WO2003001049A1 (fr)

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DE10162250A1 (de) 2001-12-18 2003-07-03 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10326707B3 (de) * 2003-06-11 2005-01-27 Westport Germany Gmbh Ventilvorrichtung und Verfahren zum Einblasen von gasförmigem Kraftstoff
DE10328573A1 (de) * 2003-06-25 2005-01-13 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102004022958A1 (de) * 2004-05-10 2005-12-22 Siemens Ag Kraftstoffinjektor mit einer korrigierbaren Einstellung eines Leerhubs einer Aktoreinheit
DE102006039522B4 (de) * 2006-08-23 2009-01-29 Continental Automotive Gmbh Verfahren zur Leerhubsteuerung einer Kraftstoffeinspritzvorrichtung
FR2907544B1 (fr) * 2006-10-19 2009-02-13 Renault Sas Systeme d'estimation du debit d'un injecteur de moteur a combustion interne
WO2008141065A1 (fr) 2007-05-10 2008-11-20 Smithkline Beecham Corporation Dérivés de quinoxaline comme inhibiteurs de p13 kinase
DE102007037036B4 (de) 2007-08-06 2014-03-27 Mtu Friedrichshafen Gmbh Verfahren und Einrichtung zur Steuerung und Regelung einer Brennkraftmaschine
DE102008023371B4 (de) * 2008-05-13 2015-07-30 Continental Automotive Gmbh Verfahren und Vorrichtung zum Betreiben einer Stellvorrichtung
DE102008027585B4 (de) * 2008-06-10 2010-04-08 Siemens Aktiengesellschaft Kalibrierung der Piezoparameter für eine Zylinderinnendruckmessung mittels Piezoinjektoren
DE102009047611A1 (de) * 2009-12-08 2011-06-09 Robert Bosch Gmbh Kraftstoffeinspritzvorrichtung mit Nadelpositionsbestimmung
US8500036B2 (en) 2010-05-07 2013-08-06 Caterpillar Inc. Hydraulically amplified mechanical coupling
WO2012100075A1 (fr) * 2011-01-19 2012-07-26 Cummins Intellectual Property, Inc. Injecteur de carburant comportant un actionneur piézoélectrique et un ensemble détecteur
DE102011081161A1 (de) 2011-08-18 2013-02-21 Continental Automotive Gmbh Ansteuerung und Ansteuerverfahren für einen piezoelektrischen Aktor
DE102012204251B4 (de) * 2012-03-19 2013-12-12 Continental Automotive Gmbh Verfahren zum Betreiben eines Kraftstoffeinspritzsystems und Kraftstoffeinspritzsystem mit Einspritzventilen mit Piezo-Direktantrieb
DE102012204252B3 (de) 2012-03-19 2013-08-29 Continental Automotive Gmbh Verfahren zum Betreiben eines Kraftstoffeinspritzsystems mit Druckabbau und Kraftstoffeinspritzsystem mit Einspritzventil mit Servoventil
DE102012207842A1 (de) 2012-05-10 2013-11-14 Continental Automotive Gmbh Einspritzventil
DE102013223764B3 (de) 2013-11-21 2015-02-26 Continental Automotive Gmbh Verfahren zum Betreiben eines Piezo-Servo-Injektors
GB201406356D0 (en) * 2014-04-09 2014-05-21 Delphi Int Operations Lux Srl Method for the control and diagnosis regarding the operation a fuel injector
GB201406358D0 (en) * 2014-04-09 2014-05-21 Delphi Int Operations Lux Srl Method for the control and diagnosis regarding the operation a fuel injector
FR3039221B1 (fr) * 2015-07-23 2017-09-01 Continental Automotive France Procede de compensation de la derive du jeu fonctionnel d'un injecteur d'un moteur a combustion interne d'un vehicule
CN105797889B (zh) * 2016-02-03 2017-12-05 惠州三高电子科技有限公司 一种喷雾产品的喷气控制装置

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Also Published As

Publication number Publication date
DE10129375B4 (de) 2005-10-06
DE50201684D1 (de) 2005-01-05
DE10129375A1 (de) 2003-01-02
US20040149840A1 (en) 2004-08-05
ATE283974T1 (de) 2004-12-15
EP1397592B1 (fr) 2004-12-01
WO2003001049A1 (fr) 2003-01-03

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