DE102007002028A1 - Regulating method for injected fuel amount at injection nozzle of fuel injecting unit for internal-combustion engine, involves comparing function values of correction function with function values of target injected amount function - Google Patents
Regulating method for injected fuel amount at injection nozzle of fuel injecting unit for internal-combustion engine, involves comparing function values of correction function with function values of target injected amount function Download PDFInfo
- Publication number
- DE102007002028A1 DE102007002028A1 DE102007002028A DE102007002028A DE102007002028A1 DE 102007002028 A1 DE102007002028 A1 DE 102007002028A1 DE 102007002028 A DE102007002028 A DE 102007002028A DE 102007002028 A DE102007002028 A DE 102007002028A DE 102007002028 A1 DE102007002028 A1 DE 102007002028A1
- Authority
- DE
- Germany
- Prior art keywords
- function
- correction function
- exhaust gas
- injection quantity
- values
- 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- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000002347 injection Methods 0.000 title claims description 67
- 239000007924 injection Substances 0.000 title claims description 67
- 238000002485 combustion reaction Methods 0.000 title claims description 8
- 239000000446 fuel Substances 0.000 title claims description 8
- 230000001105 regulatory effect Effects 0.000 title description 2
- 230000007704 transition Effects 0.000 claims abstract description 5
- 230000006870 function Effects 0.000 claims description 33
- 238000005259 measurement Methods 0.000 claims description 5
- 238000004939 coking Methods 0.000 description 8
- 230000009467 reduction Effects 0.000 description 6
- 230000004913 activation Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012886 linear function Methods 0.000 description 1
- XOFYZVNMUHMLCC-ZPOLXVRWSA-N prednisone Chemical compound O=C1C=C[C@]2(C)[C@H]3C(=O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 XOFYZVNMUHMLCC-ZPOLXVRWSA-N 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1446—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being exhaust temperatures
-
- 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
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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)
Abstract
Description
Die vorliegende Erfindung betrifft ein Verfahren zur Regelung einer Einspritzmenge an einer Einspritzdüse einer Krafteinspritzeinrichtung gemäß dem Oberbegriff des Anspruchs 1.The The present invention relates to a method for controlling a Injection amount at an injection nozzle of a force injection device according to the generic term of claim 1.
Aus
der
Die Erfindung beschäftigt sich mit dem Problem, ein gattungsgemäßes Verfahren dahingehend weiterzuentwickeln, dass sich eine Einspritzmenge an einer Einspritzdüse besonders genau einstellen lässt und darüber hinaus ein Verkokungsgrad an den Einspritzdüsen leicht zu ermitteln ist.The Invention busy with the problem of developing a generic method to that effect, that an injection quantity at an injection nozzle is particularly can be set exactly and above In addition, a degree of coking at the injectors is easy to determine.
Gelöst wird dieses Problem durch den Gegenstand des unabhängigen Anspruches 1.Is solved This problem is solved by the subject matter of independent claim 1.
Vorteilhafte Ausführungsformen sind Gegenstand der abhängigen Ansprüche.advantageous embodiments are the subject of the dependent Claims.
Die Erfindung beruht auf dem allgemeinen Gedanken, in einem nicht ballistischen Bereich einer Kraftstoffeinspritzung eine Korrekturfunktion zu ermitteln, welche linear verläuft und dadurch eine Interpolation von Zwischenwerten problemlos ermöglicht. Die lineare Korrekturfunktion wird dabei zur Regelung der Einspritzmenge an der zumindest einen Einspritzdüse im nicht ballistischen Bereich verwendet, wobei die Korrekturfunktion aus einer durch zwei Punkte gelegten Gerade gebildet wird. Ein erster Punkt der linearen Korrekturfunktion ist dabei durch einen vordefinierten Übergang einer ballistischen Düsennadelbewegung in einen nicht ballistischen Hubanschlag charakterisiert, während für die Bestimmung des zweiten Punktes eine Messung der Abgastemperatur herangezogen wird. Über die gemessene Abgastemperatur kann unter Zuhilfenahme einer Soll-Einspritzmengenfunktion, welche mit der Abgastemperaturfunktion korreliert, eine Abweichung einer Ist-Einspritzmenge von einer Soll-Einspritzmenge ermittelt werden. Zur Korrektur der Einspritzmenge muss demnach um den hieraus ermittelten Differenzwert nachgesteuert werden. Den einzelnen Funktionswerten der Soll-Einspritzmengenfunktion sind dabei zugehörige Abgastemperaturwerte zugeordnet, was gleichfalls auch für die Korrekturfunktion gilt. Aus den Differenzen zwischen Soll-Abgastemperaturen und Ist-Abgastemperaturen lassen sich somit einfach die zugehörigen Differenzeinspritzmengen ermitteln und dadurch die Einspritzmenge an sich regeln.The Invention is based on the general idea, in a non-ballistic Range of fuel injection to determine a correction function, which is linear and thereby interpolation of intermediate values easily possible. The Linear correction function is used to control the injection quantity on the at least one injection nozzle in the non-ballistic area used, with the correction function from one by two points formed straight line. A first point of the linear correction function is by a predefined transition of a ballistic Nozzle needle movement characterized in a non-ballistic stroke stop, while for the determination the second point a measurement of the exhaust gas temperature used becomes. about the measured exhaust gas temperature can be determined with the aid of a nominal injection quantity function, which correlates with the exhaust gas temperature function, a deviation an actual injection quantity of a desired injection quantity determined become. To correct the injection quantity must therefore be the result nachgesteuert be determined difference value. The individual function values The desired injection quantity function are associated exhaust gas temperature values which also applies to the correction function. From the differences between target exhaust gas temperatures and actual exhaust gas temperatures Thus, the associated differential injection quantities can be easily adjusted determine and thereby regulate the injection quantity itself.
Da sich im nicht ballistischen Bereich, also bei vollständig geöffneter Einspritzdüse, eine lineare Funktion der Einspritzmenge in Abhängigkeit der Ansteuerzeit ergibt, und die Einspritzmenge proportional abhängig von einem Querschnitt der Einspritzdüse ist, kann über die gemessene Differenz zwischen Soll-Einspritzmenge und Ist-Einspritzmenge bei einer definierten Abgastemperatur auf einen Verkokungsgrad der Einspritzdüse geschlossen werden, da mit zunehmender Verkokung ein Querschnitt der Einspritzdüse verkleinert wird und weniger Kraftstoff durch die Einspritzdüse befördert werden kann. Da der Querschnitt der Einspritzdüse der einzige variable Wert in dieser Gleichung ist, kann aus der verringerten Einspritzmenge direkt auf eine Veränderung des Querschnitts der Einspritzdüse geschlossen werden und damit indirekt auf einen Verkokungsgrad derselben.There in the non-ballistic area, ie fully open injector, gives a linear function of the injection quantity as a function of the activation time, and the injection quantity proportionally depending on a cross section the injector is, can over the measured difference between the target injection quantity and the actual injection quantity at a defined exhaust gas temperature to a degree of coking the injection be closed because with increasing coking a cross section the injector is reduced and less fuel is transported through the injector can. Because the cross section of the injector is the only variable value in this equation, can from the reduced injection quantity directly on a change of Cross section of the injection nozzle be closed and thus indirectly to a degree of coking the same.
Weitere wichtige Merkmale und Vorteile der Erfindung ergeben sich aus den Unteransprüchen, aus der Zeichnung und aus der zugehörigen Figurenbeschreibung anhand der Zeichnung.Further important features and advantages of the invention will become apparent from the Dependent claims, from the drawing and the associated Description of the figures with reference to the drawing.
Es versteht sich, dass die vorstehend genannten und die nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen.It it is understood that the above and the following yet to be explained features not only in the specified combination, but also in other combinations or alone, without to leave the scope of the present invention.
Ein bevorzugtes Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird in der nachfolgenden Beschreibung näher erläutert.One preferred embodiment The invention is illustrated in the drawing and will be described in the following Description closer explained.
Die
einzige
Entsprechend
Im
nichtballistischen Bereich ist somit die Einspritzmenge proportional
abhängig
von einem Querschnitt A einer nicht gezeigten Einspritzdüse, wobei
sich die Querschnittsfläche
A der Einspritzdüse
aufgrund von sog. Verkokungsprozessen im Laufe der Zeit verringern
kann und dadurch die Einspritzmenge bei ansonsten gleichen Bedingungen
abnimmt. Zu erwähnen
ist noch, dass die Verläufe
Zur
Regelung der Einspritzmenge an der Einspritzdüse wird dabei eine lineare
Korrekturfunktion
Ist diese Ist-Einspritzmenge kleiner als die Soll-Einspritzmenge, so kann dies aufgrund des linearen Zusammenhangs gemäß oben dargestellter Gleichung bei im übrigen unveränderten Parametern lediglich an einer Querschnittsverringerung liegen. Eine derartige Querschnittsverringerung kann beispielsweise aufgrund einer Verkokung eines Spritzlochs der Einspritzdüse vorliegen, wobei bei zunehmender Verkokung der Spritzlochdurchmesser stetig abnimmt.is this actual injection quantity is smaller than the desired injection quantity, this may be due to of the linear relationship according to the equation shown above by the way unchanged Parameters are only at a cross-sectional reduction. A such reduction in cross-section can, for example due to a coking of a spray hole of the injection nozzle are present, with increasing Coking the spray hole diameter steadily decreases.
Generell
ist der erste Punkt
Generell
können
mit dem erfindungsgemäßen Verfahren
sowohl eine Haupteinspritzmenge als auch eine Voreinspritz- oder
eine Nacheinspritzmenge bzw. beliebige Kombinationen geregelt werden. Darüber hinaus
können
zwischen den beiden Punkten
Die
Ermittlung der Verringerung des Querschnitts A der Einspritzdüse bzw.
die Ermittlung der aufgrund des verringerten Querschnitts A erhöhten Einspritzmenge
erfolgt dabei wie folgt:
Zunächst wird eine Korrekturfunktion
First, a correction function
Insbesondere kann mit der Kennzahl ΔE auch ein Verkokungsgrad der Einspritzdüse ermittelt werden, welcher sich in der Querschnittsverringerung der Einspritzdüse ausdrückt.Especially can with the measure ΔE too a degree of coking of the injection nozzle can be determined, which Expresses itself in the reduction in cross-section of the injector.
Claims (4)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007002028A DE102007002028A1 (en) | 2007-01-13 | 2007-01-13 | Regulating method for injected fuel amount at injection nozzle of fuel injecting unit for internal-combustion engine, involves comparing function values of correction function with function values of target injected amount function |
| PCT/EP2008/000195 WO2008083989A1 (en) | 2007-01-13 | 2008-01-11 | Method for controlling the injection quantity on an injection nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007002028A DE102007002028A1 (en) | 2007-01-13 | 2007-01-13 | Regulating method for injected fuel amount at injection nozzle of fuel injecting unit for internal-combustion engine, involves comparing function values of correction function with function values of target injected amount function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE102007002028A1 true DE102007002028A1 (en) | 2007-12-13 |
Family
ID=38663902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE102007002028A Withdrawn DE102007002028A1 (en) | 2007-01-13 | 2007-01-13 | Regulating method for injected fuel amount at injection nozzle of fuel injecting unit for internal-combustion engine, involves comparing function values of correction function with function values of target injected amount function |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE102007002028A1 (en) |
| WO (1) | WO2008083989A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009009796B3 (en) * | 2009-02-20 | 2010-10-07 | L'orange Gmbh | Diesel internal-combustion engine diagnosing and/or controlling method, involves determining whether pressure difference of injection interval in opening phase and/or injection interval in closing phase exceeds preset value |
| WO2013068173A1 (en) * | 2011-11-08 | 2013-05-16 | Robert Bosch Gmbh | Method and device for operating an internal combustion engine |
| DE102008001412B4 (en) * | 2008-04-28 | 2016-12-15 | Robert Bosch Gmbh | Method and device for operating an injection valve |
| DE102015104924B4 (en) * | 2014-04-23 | 2017-03-09 | Denso Corporation | Deposit detection device and fuel injection controller |
| WO2017194658A1 (en) * | 2016-05-11 | 2017-11-16 | Ge Jenbacher Gmbh & Co. Og | Method for detecting a gas amount |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10229019A1 (en) * | 2002-06-28 | 2004-01-29 | Robert Bosch Gmbh | Method for controlling a fuel metering system of an internal combustion engine |
| DE10306458A1 (en) * | 2003-02-17 | 2004-08-26 | Robert Bosch Gmbh | Method for determining control voltage of piezoelectric actuator of injection valve varying control voltage depending on the control duration of piezoelectric actuator |
| DE102004007799B4 (en) * | 2004-02-18 | 2014-04-30 | Robert Bosch Gmbh | Method and apparatus for injector-specific quantity adjustment in a fuel injection system of an internal combustion engine |
| ES2353871T3 (en) * | 2004-02-24 | 2011-03-07 | Renault S.A.S. | DEVICE AND PROCEDURE FOR REGULATING FUEL FUEL INJECTED IN A DIESEL ENGINE. |
-
2007
- 2007-01-13 DE DE102007002028A patent/DE102007002028A1/en not_active Withdrawn
-
2008
- 2008-01-11 WO PCT/EP2008/000195 patent/WO2008083989A1/en not_active Ceased
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008001412B4 (en) * | 2008-04-28 | 2016-12-15 | Robert Bosch Gmbh | Method and device for operating an injection valve |
| DE102009009796B3 (en) * | 2009-02-20 | 2010-10-07 | L'orange Gmbh | Diesel internal-combustion engine diagnosing and/or controlling method, involves determining whether pressure difference of injection interval in opening phase and/or injection interval in closing phase exceeds preset value |
| WO2013068173A1 (en) * | 2011-11-08 | 2013-05-16 | Robert Bosch Gmbh | Method and device for operating an internal combustion engine |
| DE102015104924B4 (en) * | 2014-04-23 | 2017-03-09 | Denso Corporation | Deposit detection device and fuel injection controller |
| WO2017194658A1 (en) * | 2016-05-11 | 2017-11-16 | Ge Jenbacher Gmbh & Co. Og | Method for detecting a gas amount |
| US10641196B2 (en) | 2016-05-11 | 2020-05-05 | Innio Jenbacher & Gmbh Co Og | Method for detecting a gas amount |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008083989A1 (en) | 2008-07-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OAV | Applicant agreed to the publication of the unexamined application as to paragraph 31 lit. 2 z1 | ||
| 8127 | New person/name/address of the applicant |
Owner name: DAIMLER AG, 70327 STUTTGART, DE |
|
| R005 | Application deemed withdrawn due to failure to request examination |
Effective date: 20140114 |