EP1789675B1 - Procede et dispositif de detection de course a vide d'injecteurs - Google Patents
Procede et dispositif de detection de course a vide d'injecteurs Download PDFInfo
- Publication number
- EP1789675B1 EP1789675B1 EP05777858A EP05777858A EP1789675B1 EP 1789675 B1 EP1789675 B1 EP 1789675B1 EP 05777858 A EP05777858 A EP 05777858A EP 05777858 A EP05777858 A EP 05777858A EP 1789675 B1 EP1789675 B1 EP 1789675B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rail pressure
- energy
- actuator
- rail
- injectors
- 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 - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000002485 combustion reaction Methods 0.000 claims abstract description 18
- 239000000446 fuel Substances 0.000 claims description 8
- 230000004913 activation Effects 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 claims 1
- 230000003247 decreasing effect Effects 0.000 claims 1
- 230000002123 temporal effect Effects 0.000 abstract 1
- 230000006978 adaptation Effects 0.000 description 4
- 239000002828 fuel tank Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Images
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
- F02D41/20—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
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/042—Introducing corrections for particular operating conditions for stopping the engine
-
- 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
- F02D41/2438—Active learning methods
-
- 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
- F02D41/247—Behaviour for small quantities
-
- 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
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
-
- 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
- F02D2200/0602—Fuel 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
- 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 a method for Leerhuberkennung injectors according to the independent claim 1 and relates to a device for Leerhuberkennung injectors according to the independent claim.
- Such methods such as from the EP-A-1 236 880 are known to be crucial to ensure the accuracy of the dosage for small injection quantities. If the small injection quantities are inaccurate, then the strict emission standards for diesel passenger car engines can not be met.
- methods are known which compensate the injector for injector scattering during engine operation. For example, can be determined via a knock sensor of the internal combustion engine, which control parameters are necessary to control the individual injector so that just fuel is injected (switching leakage).
- the activation condition of the method depends on the driving behavior of the driver. To determine the idle stroke with such a method, it is necessary that the operating condition of the internal combustion engine remains unchanged for a certain period of time. If this corresponding period is interrupted by the driving behavior of the driver, then the Leerhubbeées can not be completed.
- the invention has for its object to provide a method and apparatus for Leerhuberkennung of injectors, which are independent of the driving behavior of the driver.
- the invention is characterized by a method and device for Leerhuberkennung injectors.
- a constant pressure, a steady pressure drop or build-up is set.
- the current rail pressure is measured.
- An actuator of the injector is driven by an actuator energy.
- the set actuator energy is then changed. This is repeated until a discontinuity has occurred in the course of the rail pressure.
- the actuator energy is increased continuously or stepwise.
- the change of the actuator energy is limited by the possibility of the power level. For cost reasons, a gradual change is preferable.
- the rail pressure reduction can be adjusted when switching off the internal combustion engine. After switching off the engine no fuel is pumped into the fuel tank more. Due to leaks, the pressure in the fuel tank automatically drops. Eventually, additional leakage through one of the injectors is desired.
- a further embodiment of the invention is to set a steady pressure build-up when starting the internal combustion engine.
- the feed pump promotes fuel in the fuel tank (rail) and thus builds slowly and steadily on the pressure in it.
- This can also be used to determine the value pairs pressure and associated injector energy (actuator energy).
- such value pairs are stored, for example, in a memory.
- a further embodiment of the invention after determining a discontinuity in the time course of the rail pressure to set the actuator energy to an initial value, wherein then the current rail pressure is measured, the actuator of the injector is driven with an actuator energy and the actuator energy is changed until a discontinuity occurs again in the time course of the rail pressure.
- the actuator of the injector is driven with an actuator energy and the actuator energy is changed until a discontinuity occurs again in the time course of the rail pressure.
- FIG. 1 shows in the upper section of the diagram the time profile with 1 rail pressure marked. In the lower part of the diagram, the time profile is shown with 2 labeled actuator energy.
- a fuel reservoir is present, to which an injector, in particular a piezo injector, is connected.
- the actuator of the injector, here piezo actuator receives a drive signal with the energy shown in the figure 1.
- the pressure in the common rail system builds up linearly and steadily until time t 1 .
- the pressure reduction in the fuel storage of the common rail system is due to leakage currents.
- a drive signal with the energy E 1 is then applied to the piezoelectric actuator of the injector at time t 2 .
- the energy E 1 is too low to push the servo valve of the injector out of its seat.
- the actuator energy is raised to E 2 .
- the drive signal is applied to the piezoelectric actuator. As can be seen in the pressure curve 1 shown above, this energy E 2 is too low.
- Known systems that evaluate the combustion signal can supplement the inventive method or device and can detect the ratio between idle stroke and injector seat wear with respect to quantity correction of the individual injectors separately.
- the method according to the invention makes it possible to expand the very narrow injector production tolerances and reduces the scrap content of the injectors produced.
- piezo actuators need not be preconditioned, since the method according to the invention compensates for the idle stroke directly over the service life by adapting the energy.
- the method or device according to the invention is distinguished by its robustness compared with the other known methods, and since the method according to the invention can be implemented without additional components.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Claims (11)
- Procédé pour la détection de la course à vide d'injecteurs, en particulier d'injecteurs piézo-électriques d'un moteur à combustion interne équipé d'un système de rampe commune, comprenant les étapes suivantes :a) établir une pression de rampe constante ou une décroissance ou croissance constante de la pression de rampe,b) mesurer la pression actuelle de la rampe,c) commander au moins un actionneur d'injecteur avec une énergie d'actionneur,d) modifier l'énergie de l'actionneur,e) répéter les étapes b) à d) jusqu'à ce qu'il se produise une discontinuité dans la courbe de variation dans le temps de la pression de la rampe.
- Procédé selon la revendication 1, caractérisé en ce que l'énergie d'actionneur est modifiée par pas discrets pour obtenir un nouveau palier de l'énergie d'actionneur, l'actionneur de l'injecteur étant commandé avec au moins un signal de commande à chaque palier réglé de l'énergie d'actionneur.
- Procédé selon une des revendications précédentes, caractérisé en ce que l'énergie d'actionneur appliquée est constante dans le temps et que, lors d'une modification, elle est augmentée ou elle est diminuée d'une quantité d'énergie déterminée.
- Procédé selon une des revendications précédentes, caractérisé en ce qu'on augmente ou diminue l'énergie d'actionneur appliquée par variation continue.
- Procédé selon une des revendications précédentes, caractérisé en ce que, lors de la mise à l'arrêt du moteur à combustion interne, dans l'étape a), on établit une chute constante de pression de la rampe.
- Procédé selon une des revendications précédentes, caractérisé en ce que, lors du démarrage du moteur à combustion interne, dans l'étape a) on établit une élévation constante de la pression de la rampe.
- Procédé selon une des revendications précédentes, caractérisé en ce qu'après l'étape e), l'énergie d'actionneur réglée et la pression de rampe actuelle sont mémorisées pour constituer une mesure pour la course à vide de l'injecteur.
- Procédé selon la revendication 7, caractérisé en ce que, après mémorisation des valeurs d'énergie et de pression de la rampe, les étapes b) à e) sont exécutées avec l'énergie d'actionneur fixée préalablement à une valeur initiale.
- Procédé selon une des revendications précédentes, caractérisé en ce que, pendant une phase de poussée du moteur à combustion interne, dans l'étape a), on établit une pression de rampe constante ou une chute de pression de rampe constante.
- Procédé selon la revendication 9, caractérisé en ce que, après l'étape e), la pression de la rampe est portée à une valeur d'adaptation souhaitée.
- Dispositif pour la détection d'une course à vide d'injecteurs d'un moteur à combustion interne équipé d'un système de rampe commune, comprenant un accumulateur de pression de carburant, un injecteur raccordé à l'accumulateur de pression de carburant, un détecteur de pression de la rampe et une unité de commande pour les actionneurs des injecteurs, l'unité de commande modifiant l'énergie des actionneurs jusqu'à ce que le détecteur de pression de la rampe détecte une discontinuité dans la courbe de variation dans le temps de la pression de la rampe, le dispositif comprenant une unité de mémoire pour l'enregistrement de la valeur d'énergie d'actionneur appliquée lors de la discontinuité ainsi que de la valeur de pression de rampe appliquée.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004044450A DE102004044450B3 (de) | 2004-09-14 | 2004-09-14 | Verfahren und Vorrichtung zur Leerhuberkennung von Injektoren |
PCT/EP2005/053554 WO2006029931A1 (fr) | 2004-09-14 | 2005-07-21 | Procede et dispositif de detection de course a vide d'injecteurs |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1789675A1 EP1789675A1 (fr) | 2007-05-30 |
EP1789675B1 true EP1789675B1 (fr) | 2008-06-25 |
Family
ID=35058399
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05777858A Expired - Fee Related EP1789675B1 (fr) | 2004-09-14 | 2005-07-21 | Procede et dispositif de detection de course a vide d'injecteurs |
Country Status (5)
Country | Link |
---|---|
US (1) | US7406861B2 (fr) |
EP (1) | EP1789675B1 (fr) |
CN (1) | CN100504061C (fr) |
DE (2) | DE102004044450B3 (fr) |
WO (1) | WO2006029931A1 (fr) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006039522B4 (de) * | 2006-08-23 | 2009-01-29 | Continental Automotive Gmbh | Verfahren zur Leerhubsteuerung einer Kraftstoffeinspritzvorrichtung |
DE102007034188A1 (de) * | 2007-07-23 | 2009-01-29 | Robert Bosch Gmbh | Verfahren zum Betreiben eines Einspritzventils |
DE102007052092B4 (de) | 2007-10-31 | 2011-06-01 | Continental Automotive Gmbh | Verfahren und Kraftstoffsystem zum Steuern der Kraftstoffzufuhr für eine Brennkraftmaschine |
DE102008029799A1 (de) | 2008-06-24 | 2009-12-31 | Continental Automotive Gmbh | Ansteuerverfahren für Einspritzinjektoren bei direkteinspritzenden Brennkraftmaschinen |
DE102010021168B4 (de) * | 2010-05-21 | 2020-06-25 | Continental Automotive Gmbh | Verfahren zum Betreiben einer Brennkraftmaschine und Brennkraftmaschine |
DE102010039841B4 (de) * | 2010-08-26 | 2014-01-09 | Continental Automotive Gmbh | Verfahren zum Anpassen der Einspritzcharakteristik eines Einspritzventils |
DE102011005285B4 (de) | 2011-03-09 | 2015-08-20 | Continental Automotive Gmbh | Verfahren zur Bestimmung des Leerhubes eines Piezoinjektors mit direkt betätigter Düsennadel |
DE102011081161A1 (de) * | 2011-08-18 | 2013-02-21 | Continental Automotive Gmbh | Ansteuerung und Ansteuerverfahren für einen piezoelektrischen Aktor |
DE102011083068A1 (de) * | 2011-09-20 | 2013-03-21 | Robert Bosch Gmbh | Verfahren zum Bestimmen eines Werts eines Stroms |
DE102012208614A1 (de) * | 2012-05-23 | 2013-11-28 | Robert Bosch Gmbh | Verfahren zum Betreiben eines Kraftstoffsystems für eine Brennkraftmaschine |
DE102013201777A1 (de) | 2013-02-04 | 2014-08-07 | Robert Bosch Gmbh | Verfahren zur Ansteuerung eines Einspritzventils einer Brennkraftmaschine |
DE102013205504B4 (de) * | 2013-03-27 | 2019-02-07 | Continental Automotive Gmbh | Bestimmung der Öffnungsenergie eines Kraftstoffinjektors |
DE102013206674A1 (de) * | 2013-04-15 | 2014-10-16 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Ansteuerung eines Mengensteuerventils |
FR3013392B1 (fr) | 2013-11-21 | 2017-12-29 | Continental Automotive France | Procede de surveillance d'un injecteur de carburant d'un moteur a combustion interne d'un vehicule |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3128238C2 (de) * | 1981-07-17 | 1986-11-06 | Pierburg Gmbh & Co Kg, 4040 Neuss | Verfahren und Einrichtung zum Bestimmen der eingespritzten Kraftstoffmenge |
US5535621A (en) * | 1994-03-02 | 1996-07-16 | Ford Motor Company | On-board detection of fuel injector malfunction |
US5633458A (en) * | 1996-01-16 | 1997-05-27 | Ford Motor Company | On-board fuel delivery diagnostic system for an internal combustion engine |
JPH11101149A (ja) * | 1997-09-26 | 1999-04-13 | Isuzu Motors Ltd | エンジンの燃料噴射方法及びその装置 |
DE19757293C2 (de) * | 1997-12-22 | 1999-11-25 | Siemens Ag | Vorrichtung zum Bestimmen des Einspritzbeginns bei einer direkteinspritzenden Brennkraftmaschine |
DE19902807C1 (de) * | 1999-01-25 | 2000-06-08 | Siemens Ag | Leerhubeinstellung zwischen einem Aktor und einem vom Aktor betätigten Servoventil in einem Kraftstoffinjektor |
DE19905340C2 (de) * | 1999-02-09 | 2001-09-13 | Siemens Ag | Verfahren und Anordnung zur Voreinstellung und dynamischen Nachführung piezoelektrischer Aktoren |
US6420817B1 (en) * | 2000-02-11 | 2002-07-16 | Delphi Technologies, Inc. | Method for detecting injection events in a piezoelectric actuated fuel injector |
DE10014737A1 (de) * | 2000-03-24 | 2001-10-11 | Bosch Gmbh Robert | Verfahren zur Bestimmung des Raildrucks eines Einspritzventils mit einem piezoelektrischen Aktor |
GB2366598A (en) * | 2000-09-07 | 2002-03-13 | Cummins Engine Co Ltd | Detecting leakage in the fuel rail of an i.c. engine |
GB0104215D0 (en) * | 2001-02-21 | 2001-04-11 | Delphi Tech Inc | Control method |
US7188608B2 (en) * | 2001-12-11 | 2007-03-13 | Caterpillar Inc. | Rail pressure sampling before fuel injection events |
JP2003328835A (ja) * | 2002-05-14 | 2003-11-19 | Mitsubishi Electric Corp | 内燃機関制御装置のための燃圧センサ装置 |
JP2005030342A (ja) * | 2003-07-09 | 2005-02-03 | Denso Corp | コモンレール式燃料噴射装置 |
US7040149B2 (en) * | 2003-10-24 | 2006-05-09 | Senx Technology, Llc | Fuel injection system diagnostic system |
JP4321342B2 (ja) * | 2004-04-22 | 2009-08-26 | 株式会社デンソー | コモンレール式燃料噴射装置 |
-
2004
- 2004-09-14 DE DE102004044450A patent/DE102004044450B3/de not_active Expired - Fee Related
-
2005
- 2005-07-21 WO PCT/EP2005/053554 patent/WO2006029931A1/fr active IP Right Grant
- 2005-07-21 EP EP05777858A patent/EP1789675B1/fr not_active Expired - Fee Related
- 2005-07-21 DE DE502005004537T patent/DE502005004537D1/de active Active
- 2005-07-21 CN CNB2005800307822A patent/CN100504061C/zh not_active Expired - Fee Related
-
2007
- 2007-03-14 US US11/685,957 patent/US7406861B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE102004044450B3 (de) | 2006-04-06 |
US20070204832A1 (en) | 2007-09-06 |
WO2006029931A1 (fr) | 2006-03-23 |
EP1789675A1 (fr) | 2007-05-30 |
US7406861B2 (en) | 2008-08-05 |
CN100504061C (zh) | 2009-06-24 |
DE502005004537D1 (de) | 2008-08-07 |
CN101018945A (zh) | 2007-08-15 |
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