EP1315893B1 - Procede de commande de la quantite de carburant injecte dans un moteur a combustion interne a injection directe - Google Patents
Procede de commande de la quantite de carburant injecte dans un moteur a combustion interne a injection directe Download PDFInfo
- Publication number
- EP1315893B1 EP1315893B1 EP01969575A EP01969575A EP1315893B1 EP 1315893 B1 EP1315893 B1 EP 1315893B1 EP 01969575 A EP01969575 A EP 01969575A EP 01969575 A EP01969575 A EP 01969575A EP 1315893 B1 EP1315893 B1 EP 1315893B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- injector
- duration
- fuel
- current
- current peak
- 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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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
- F02D41/30—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
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
Definitions
- the present invention relates to a method of control of the quantity of fuel injected into a internal combustion engine with direct injection. More in particular, the invention relates to such a process implemented using an injector powered by pressurized fuel, opening said injector being electromagnetically triggered by power an electric coil forming part of the injector with a current peak of predetermined duration.
- Fuel injectors with controls electromagnetic are well known, as is the process for controlling such an injector mentioned above (see par example US patent 5,381,297).
- Such injector includes a movable needle under the action of a electromagnetic field developed by a coil electric powered by a suitable current, between a position where one end of this needle closes a opening pierced in a seat defining a passage for a fuel to be injected into an engine cylinder internal combustion, and a position where the needle releases this opening to allow such an injection.
- the needle At rest the needle is loaded against its seat by a calibration spring and by the fuel pressure admitted in the injector.
- patent EP 0 893 594 discloses the preamble of claim 1.
- the present invention therefore aims to provide a method of controlling the quantity of fuel injected in an internal combustion engine with direct injection, by a high dynamic injector, typically of around 20.
- This object of the invention is achieved, as well as other which will appear on reading the description which will follow, with a process for controlling the quantity of fuel injected into an internal combustion engine at direct injection by an injector powered by fuel under pressure, the opening of said injector being electromagnetically triggered by supplying a electric winding forming part of the injector with a predetermined current peak, this process being remarkable in that said duration of said current peak is a function increasing said fuel pressure.
- this process allows to widen the range of values of quantities of fuel injected, both on the very weak side quantities only on the side of the largest quantities.
- the duration of said current peak is also increasing function of the duration of an opening time predetermined of said injector.
- the current time profile I represented in FIG. 1 is controlled and calculated by an injector control circuit itself supplied by suitable signals emitted by a microprocessor forming part of the computer.
- the microprocessor emits a logic signal S L (see fig. 1) defining the total duration (t 2 -t 0 ) of excitation of the winding with the current I of command to open the injector for a time T i predetermined, calculated by the computer as a function of the quantity of fuel to be injected into a cylinder of the engine.
- the control circuit sends in the winding of the injector a “precharge” current making it possible to store energy in this winding, to facilitate the subsequent effective opening of the injector, at a predetermined instant t 1 , as will be seen below.
- the current in the winding during the interval (t 1 -t 0 ) is stabilized at a substantially constant value, just sufficient not to trigger the opening of the injector.
- the precharge current is established in this winding by applying a voltage between its terminals chopped which gives the current a sawtooth profile shown in Figure 1.
- Such a power supply described in the aforementioned US patent 5,381,297, is advantageous in that it takes advantage of the self-induction current which grows in the injector winding, to limit the electric power consumed during the current peak ulterior.
- the injector control circuit conforms to the current admitted into the coil according to the current peak, of duration T 1 , shown at FIG. 1.
- the rise of the current in the winding is advantageously rapid, thanks to the preload of the winding, and peaks for example at a value of approximately 11 amperes and at a voltage of approximately 70 V. This speed causes an immediate effective opening , at time t 1 , from the injector, by tearing off the needle of the injector, from the seat on which it is loaded by a spring and by the fuel pressure.
- the breakout force is applied electromagnetically to this needle using a magnetic flux developed in the winding (on the axis of which the needle is placed), by the sudden rise of the current in this winding at the moment t 1 .
- the current passing through the winding should therefore be as low as possible. This is why, after the current peak of duration T 1 , the current is reduced, by a step of rapid decay of duration T 2 to a lower value, of a few amperes, sufficient nevertheless to keep the injector open for a predetermined time.
- the substantially constant "holding" current I m is also established by applying a chopped voltage to the winding of the injector.
- the time T 2 is a function of T 1 and of the voltage of the electrical energy source which feeds the injector, ie the voltage of the battery in the case of an engine mounted in a motor vehicle.
- the duration T 1 of the peak current is, in known manner, a function of the opening time T i of the injector, predetermined by the computer, or "injection time". According to a characteristic of the present invention, this duration T 1 is also an increasing function of the pressure of the fuel supplying the injector.
- This graph presents a linear part in which one can adjust the quantity Q1 of fuel with a dynamic Q1 max / Q1 min of the order of 10, at most, as we saw above.
- a moderate fuel pressure is then used, of the order of 50 bars for example and a current peak of shortened duration, 200 ⁇ s for example, with a holding current of 3.5 A for example.
- These conditions correspond to graph C (dashed line) in FIG. 2.
- the engine management computer calculates as a function of the engine load, the values of the fuel pressure to be established and the times T 1 and T 2 applicable to each fuel injection. These values T 1 and T 2 are transmitted, by links of the SPI or CAN type for example, to the injector control circuit which consequently conforms the time profile of the current to be applied to the injector.
- the invention is not limited to the mode of realization described and represented which was given only as an example. This is how the preload, advantageous, from the winding prior to the application of the peak current, however, is not essential, the invention thus also applying to an injector supplied by a current whose profile is devoid of this preload.
- the invention is applicable to injectors fueled with variable pressure fuel as at injectors supplied at constant pressure. In the case a fuel pressure regulation failure, the high value of this is normally limited by the calibration of a safety valve.
- the growth, according to the invention the duration of the current peak with that of the fuel pressure up to this value high, then establishes operation in "degraded mode" the fuel supply to the injectors.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Fuel-Injection Apparatus (AREA)
Description
- la figure 1 est un graphe montrant l'évolution temporelle 1) du courant dans le bobinage d'un injecteur commandé selon la présente invention pour régler le temps d'ouverture de l'injecteur, et 2) d'un signal logique de commande de l'injecteur, et
- la figure 2 représente des graphes montrant l'évolution de la quantité de carburant débitée par l'injecteur en fonction de la durée de son temps d'ouverture, dans différentes conditions de fonctionnement de cet injecteur, ces graphes permettant d'illustrer et d'expliquer les performances du procédé de commande suivant l'invention.
Claims (4)
- Procédé de commande de la quantité de carburant (Q) injecté dans un moteur à combustion interne à injection directe par un injecteur alimenté par du carburant sous pression (Pcarb), l'ouverture dudit injecteur étant déclenchée électromagnétiquement par alimentation d'un bobinage électrique formant partie de l'injecteur selon un profil de courant prédéterminé, dans lequel:on commande l'alimentation du bobinage de manière à obtenir un pic de courant d'une durée déterminée (T1), ladite durée (T1) dudit pic de courant étant fonction croissante de ladite pression (Pcarb) du carburant,on commande ensuite une décroissance rapide de l'intensité du courant, la durée (T2) de ladite décroissance étant fonction de ladite durée (T1) et de la tension de la source d'énergie électrique qui alimente ledit injecteur, eton stabilise le courant pendant un temps de maintien prédéterminé, à une valeur sensiblement constante fonction croissante de la pression de carburant (Pcarb).
- Procédé conforme à la revendication 1, caractérisé en ce que ladite durée (T1) dudit pic de courant est aussi fonction de la durée d'un temps d'ouverture (Ti) prédéterminé dudit injecteur.
- Procédé conforme à la revendication 1, caractérisé en ce que la durée (T1) dudit pic de courant passe de 200 µs environ pour une pression de carburant (Pcarb) de 50 bars environ, à 600 µs environ pour une pression de carburant (Pcarb) de 120 bars environ.
- Procédé conforme à l'une quelconque des revendications 1 à 3, caractérisé en ce qu'on commande une précharge dudit bobinage, préalable à l'application dudit pic de courant.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0011237A FR2813642B1 (fr) | 2000-09-04 | 2000-09-04 | Procede de commande de la quantite de carburant injecte dans un moteur a combustion interne a injection directe |
FR0011237 | 2000-09-04 | ||
PCT/EP2001/009120 WO2002020968A1 (fr) | 2000-09-04 | 2001-08-07 | Procede de commande de la quantite de carburant injecte dans un moteur a combustion interne a injection directe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1315893A1 EP1315893A1 (fr) | 2003-06-04 |
EP1315893B1 true EP1315893B1 (fr) | 2004-04-07 |
Family
ID=8853936
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01969575A Expired - Lifetime EP1315893B1 (fr) | 2000-09-04 | 2001-08-07 | Procede de commande de la quantite de carburant injecte dans un moteur a combustion interne a injection directe |
Country Status (8)
Country | Link |
---|---|
US (1) | US6755181B2 (fr) |
EP (1) | EP1315893B1 (fr) |
JP (1) | JP4478385B2 (fr) |
KR (1) | KR100763052B1 (fr) |
DE (1) | DE60102708T2 (fr) |
ES (1) | ES2218449T3 (fr) |
FR (1) | FR2813642B1 (fr) |
WO (1) | WO2002020968A1 (fr) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10347056A1 (de) * | 2003-10-07 | 2005-05-12 | Daimler Chrysler Ag | Verfahren zur Regelung eines Magnetventils |
US7013876B1 (en) | 2005-03-31 | 2006-03-21 | Caterpillar Inc. | Fuel injector control system |
JP4715807B2 (ja) * | 2007-05-24 | 2011-07-06 | トヨタ自動車株式会社 | 燃料噴射装置の調整方法、及び燃料噴射装置の制御装置 |
JP2009074373A (ja) * | 2007-09-19 | 2009-04-09 | Hitachi Ltd | 内燃機関の燃料噴射制御装置 |
DE102007045779A1 (de) * | 2007-09-25 | 2009-04-09 | Continental Automotive Gmbh | Verfahren zur Ansteuerung eines Magnetventils und zugehörige Vorrichtung |
JP5053868B2 (ja) * | 2008-01-07 | 2012-10-24 | 日立オートモティブシステムズ株式会社 | 燃料噴射制御装置 |
JP4917556B2 (ja) * | 2008-01-07 | 2012-04-18 | 日立オートモティブシステムズ株式会社 | 内燃機関の燃料噴射制御装置 |
JP2010255444A (ja) * | 2009-04-21 | 2010-11-11 | Hitachi Automotive Systems Ltd | 内燃機関の燃料噴射制御装置及び方法 |
JP5698938B2 (ja) | 2010-08-31 | 2015-04-08 | 日立オートモティブシステムズ株式会社 | 燃料噴射装置の駆動装置及び燃料噴射システム |
US8662056B2 (en) * | 2010-12-30 | 2014-03-04 | Delphi Technologies, Inc. | Fuel pressure control system and method having a variable pull-in time interval based pressure |
JP5975899B2 (ja) * | 2013-02-08 | 2016-08-23 | 日立オートモティブシステムズ株式会社 | 燃料噴射装置の駆動装置 |
DE102013207152B4 (de) * | 2013-04-19 | 2016-03-31 | Continental Automotive Gmbh | Verfahren und Vorrichtung zum Ansteuern eines Einspritzventils in einem nichtlinearen Betriebsbereich |
US20160115921A1 (en) * | 2013-05-24 | 2016-04-28 | International Engine Intellectual Property Company , Llc | Injector waveform |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6240241B1 (en) * | 1991-08-19 | 2001-05-29 | Index Systems, Inc. | Still frame video in index |
US5381297A (en) * | 1993-06-18 | 1995-01-10 | Siemens Automotive L.P. | System and method for operating high speed solenoid actuated devices |
JP3577339B2 (ja) * | 1994-05-19 | 2004-10-13 | 富士重工業株式会社 | エンジンの燃料噴射弁駆動回路 |
JPH08193538A (ja) * | 1995-01-18 | 1996-07-30 | Nippondenso Co Ltd | 内燃機関の燃料制御装置 |
CN1625238A (zh) * | 1996-03-15 | 2005-06-08 | 英戴克***公司 | 盒式磁带录像机索引和电子节目引导的组合 |
US6125231A (en) * | 1996-08-23 | 2000-09-26 | Index Systems, Inc. | Method of adding titles to a directory of television programs recorded on a video tape |
US6177931B1 (en) * | 1996-12-19 | 2001-01-23 | Index Systems, Inc. | Systems and methods for displaying and recording control interface with television programs, video, advertising information and program scheduling information |
JP3707210B2 (ja) | 1997-07-22 | 2005-10-19 | いすゞ自動車株式会社 | 燃料噴射制御装置 |
JPH11107882A (ja) * | 1997-09-30 | 1999-04-20 | Unisia Jecs Corp | 燃料噴射弁の駆動装置 |
JPH11351039A (ja) * | 1998-06-10 | 1999-12-21 | Toyota Motor Corp | インジェクタ駆動回路 |
DE69905685T2 (de) | 1998-11-19 | 2003-10-02 | Mitsubishi Motors Corp | Kraftstoffeinspritzvorrichtung der Akkumulatorgattung |
DE19903555C2 (de) * | 1999-01-29 | 2001-05-31 | Daimler Chrysler Ag | Vorrichtung zur Steuerung eines Piezoelement-Einspritzventils |
-
2000
- 2000-09-04 FR FR0011237A patent/FR2813642B1/fr not_active Expired - Fee Related
-
2001
- 2001-08-07 JP JP2002525355A patent/JP4478385B2/ja not_active Expired - Fee Related
- 2001-08-07 DE DE60102708T patent/DE60102708T2/de not_active Expired - Fee Related
- 2001-08-07 US US10/363,311 patent/US6755181B2/en not_active Expired - Fee Related
- 2001-08-07 WO PCT/EP2001/009120 patent/WO2002020968A1/fr active IP Right Grant
- 2001-08-07 ES ES01969575T patent/ES2218449T3/es not_active Expired - Lifetime
- 2001-08-07 EP EP01969575A patent/EP1315893B1/fr not_active Expired - Lifetime
- 2001-08-07 KR KR1020037003161A patent/KR100763052B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP1315893A1 (fr) | 2003-06-04 |
FR2813642B1 (fr) | 2002-12-20 |
JP4478385B2 (ja) | 2010-06-09 |
DE60102708D1 (de) | 2004-05-13 |
KR20030036743A (ko) | 2003-05-09 |
US20030188717A1 (en) | 2003-10-09 |
US6755181B2 (en) | 2004-06-29 |
ES2218449T3 (es) | 2004-11-16 |
KR100763052B1 (ko) | 2007-10-02 |
FR2813642A1 (fr) | 2002-03-08 |
DE60102708T2 (de) | 2004-10-21 |
JP2004514082A (ja) | 2004-05-13 |
WO2002020968A1 (fr) | 2002-03-14 |
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