DE102005001882A1 - Method for operation of internal combustion engine involves measuring concentration of fuel components by means of fuel sensor in synthetic fuel mixture with dielectric constant less than or equal to three and half - Google Patents
Method for operation of internal combustion engine involves measuring concentration of fuel components by means of fuel sensor in synthetic fuel mixture with dielectric constant less than or equal to three and half Download PDFInfo
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- DE102005001882A1 DE102005001882A1 DE102005001882A DE102005001882A DE102005001882A1 DE 102005001882 A1 DE102005001882 A1 DE 102005001882A1 DE 102005001882 A DE102005001882 A DE 102005001882A DE 102005001882 A DE102005001882 A DE 102005001882A DE 102005001882 A1 DE102005001882 A1 DE 102005001882A1
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- 239000000446 fuel Substances 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000000203 mixture Substances 0.000 title claims abstract description 29
- 238000002485 combustion reaction Methods 0.000 title claims description 22
- 239000002283 diesel fuel Substances 0.000 claims abstract description 38
- 230000008033 biological extinction Effects 0.000 claims description 10
- 238000012937 correction Methods 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 125000001931 aliphatic group Chemical group 0.000 claims description 2
- 238000004458 analytical method Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 239000004615 ingredient Substances 0.000 claims description 2
- 239000002816 fuel additive Substances 0.000 claims 1
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 15
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 5
- 239000002828 fuel tank Substances 0.000 description 4
- 239000003502 gasoline Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 235000019484 Rapeseed oil Nutrition 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 230000000035 biogenic effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 150000004702 methyl esters Chemical class 0.000 description 2
- 238000004566 IR spectroscopy Methods 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 239000003225 biodiesel Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
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- 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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
- F02D19/0649—Liquid fuels having different boiling temperatures, volatilities, densities, viscosities, cetane or octane numbers
- F02D19/0652—Biofuels, e.g. plant oils
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
- F02D19/082—Premixed fuels, i.e. emulsions or blends
- F02D19/085—Control based on the fuel type or composition
- F02D19/087—Control based on the fuel type or composition with determination of densities, viscosities, composition, concentration or mixture ratios of fuels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/0007—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for using electrical feedback
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3577—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing liquids, e.g. polluted water
-
- 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
- F02D41/0002—Controlling intake air
- F02D2041/0017—Controlling intake air by simultaneous control of throttle and exhaust gas recirculation
-
- 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
- F02D2200/0611—Fuel type, fuel composition or fuel quality
-
- 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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
-
- 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
- F02D41/1497—With detection of the mechanical response of the engine
- F02D41/1498—With detection of the mechanical response of the engine measuring engine roughness
-
- 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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
-
- 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
Abstract
Description
Die vorliegende Erfindung betrifft ein Verfahren zum Betrieb einer Brennkraftmaschine sowie ein Verfahren und einen Sensor zur Analyse der Zusammensetzung eines Kraftstoffs. In letzter Zeit hat das Interesse an synthetischen Dieselkraftstoffen zugenommen. Diese so genannten „Synfuels" sind aus Erdgas nach der Fischer-Tropsch-Synthese herstellbare synthetische Dieselkraftstoffe, die gegenüber den herkömmlichen Dieselkraftstoffen wesentliche Anwendungsvorteile aufweisen. Dies ist insbesondere die erheblich reduzierte Schadstoffemission. Die Synfuels sind praktisch geruchsneutral und mit diesen betriebene Dieselmotoren haben einen erheblich reduzierten Partikelausstoß (Ruß). Umweltpolitische Gesichtspunkte sprechen daher für einen verstärkten Einsatz dieser synthetischen Dieselkraftstoffe. Voraussichtlich wird zukünftig ein höherer Anteil an Zumischungen der genannten Fischer-Tropsch-Kraftstoffe zu herkömmlichem Dieselkraftstoff zulässig sein. Diese Zumischungen unterscheiden sich von konventionellem Dieselkraftstoff unter anderem auch in Heizwert und Dichte. Bestimmte Motoren erfüllen mit diesen Kraftstoffen nicht mehr die festgelegten Abgasemissions-Grenzwerte.The The present invention relates to a method of operating an internal combustion engine and a method and a sensor for analyzing the composition a fuel. Recently, the interest in synthetic Diesel fuels increased. These so-called "synfuels" are made of natural gas after the Fischer-Tropsch synthesis manufacturable synthetic diesel fuels compared to the usual Diesel fuels have significant application advantages. This is in particular the significantly reduced pollutant emission. The Synfuels are virtually odorless and operated with them Diesel engines have significantly reduced particulate emissions (soot). environmental policy Therefore, points of view speak for one increased Use of these synthetic diesel fuels. Expected will in the future a higher one Proportion of admixtures of said Fischer-Tropsch fuels to conventional Diesel fuel. These admixtures are different from conventional diesel fuel including in calorific value and density. Certain engines comply with these fuels are no longer the specified exhaust emission limits.
Bei Dieselkraftstoffen sind derzeit biogene Anteile aus landwirtschaftlicher Produktion (Rapsölmethylester, „Biodiesel") als Beimengungen von bis zu 5 % erlaubt.at Diesel fuels are currently biogenic components of agricultural Production (rapeseed oil methyl ester, "biodiesel") as admixtures of up to 5% allowed.
Die
Die
In
der
Bei
dem in der
In
der
Die Aufgabe der vorliegenden Erfindung besteht darin, ein Verfahren zum Betrieb einer Brennkraftmaschine zur Verfügung zu stellen, welches mit einem verhältnismäßig geringen Aufwand und einfachen Mitteln einen ordnungsgemäßen Betrieb der Brennkraftmaschine bei Verwendung von Mischkraftstoffen unterschiedlichster Zusammensetzung ermöglicht.The The object of the present invention is a method to provide for the operation of an internal combustion engine, which with a relatively small one Effort and simple means proper operation of the internal combustion engine when using mixed fuels of different composition allows.
Die Lösung dieser Aufgabe liefert ein Verfahren zum Betrieb einer Brennkraftmaschine der eingangs genannten Gattung mit den kennzeichnenden Merkmalen des Hauptanspruchs. Erfindungsgemäß wird vorzugsweise mit Hilfe mindestens eines Sensors mindestens ein für einen bestimmten Kraftstoffbestandteil spezifisches IR-Signal erfasst. Das so ermittelte für einen bestimmten Inhaltsstoff des Kraftstoffs spezifische IR-Signal wird vorzugsweise einem Steuergerät mitgeteilt. Dieses kann dann beispielsweise einen Korrekturfaktor berechnen und anschließend anhand eines solchen Korrekturfaktors auf ein oder mehrere Parameter, die den Betrieb der Brennkraftmaschine beeinflussen, einwirken. Als solche Parameter kommen beispielhaft in Betracht die Einspritzmenge, Luftmasse, Förderbeginn, Ladeluftsteller, EGR-Steller oder dergleichen.The solution This object is achieved by a method for operating an internal combustion engine the aforementioned genus with the characterizing features of the main claim. According to the invention is preferably with the help at least one sensor at least one for a particular fuel component specific IR signal detected. The thus determined for a specific ingredient of the fuel specific IR signal is preferably communicated to a control unit. This can then For example, calculate a correction factor and then use of such a correction factor to one or more parameters, the affect the operation of the internal combustion engine, act. When such parameters are exemplary of the injection quantity, Air mass, start of delivery, Intercooler, EGR controller or the like.
Mittels des erfindungsgemäßen Verfahrens werden vorzugsweise unpolare synthetische Kraftstoffzumischungen in einem Dieselkraftstoff erfasst, insbesondere solche, die eine Dielektrizitätskonstante ε2 ≤ 3,5 aufweisen.By means of the method according to the invention, preferably non-polar synthetic fuel mixtures in a diesel fuel are detected, in particular those which have a dielectric constant ε 2 ≦ 3.5.
Aufgabe der vorliegenden Erfindung ist es weiterhin, ein Verfahren zur Analyse der Zusammensetzung eines Kraftstoffs zur Verfügung zu stellen, welches insbesondere für die Feststellung nichtalkoholischer Kraftstoffbeimischungen geeignet ist. Die Lösung dieser Aufgabe liefert ein Verfahren zur Analyse der Zusammensetzung eines Kraftstoffs unter Verwendung eines Kraftstoffsensors, mittels dessen der Gehalt an mindestens einer vorzugsweise unpolaren synthetischen Kraftstoffzumischung in einem Dieselkraftstoff erfasst wird. Vorzugsweise wird dabei mittels eines Sensors eine solche Kraftstoffzumischung über ein für diese spezifisches IR-Signal erfasst.task The present invention further provides a method for analysis the composition of a fuel to provide, which in particular for the Detection of non-alcoholic fuel admixtures suitable is. The solution This object is achieved by a method for analyzing the composition of a fuel using a fuel sensor, by means of of which the content of at least one preferably non-polar synthetic Fuel admixing is detected in a diesel fuel. Preferably In this case, by means of a sensor, such fuel addition via for this detected specific IR signal.
Derartige Kraftstoffe lassen sich beispielsweise infrarotspektroskopisch von konventionellen Dieselkraftstoffen unterscheiden, welche typischerweise einen Aromatenanteil von zwischen etwa 20 und etwa 30 Gew.-% aufweisen.such Fuels can be, for example, infrared spectroscopy of conventional diesel fuels, which typically have an aromatic content of between about 20 and about 30 wt .-%.
Erfindungsgemäß soll bevorzugt ein Sensor zum Einsatz kommen, der eine typische IR-Aromatenbande und/oder eine typische C-H-Streckschwingung, insbesondere für aliphatische HC, misst. Die Messung dieser IR-Banden geschieht vorzugsweise über Laserdioden, die für diese Zwecke speziell eingestellt werden können. Vorzugsweise wird eine Kalibrierung des Sensors vorgenommen. Diese Kalibrierung geschieht insbesondere anhand der unvermischten Kraftstoffkomponenten. Erfindungsgemäß kann man vorzugsweise mittels geeigneter Filterungsverfahren Extinktionsverhältnisse bei mindestens zwei Wellenlängen bilden und dadurch den Gehalt an z.B. einer Fischer-Tropsch-Kraftstoffzumischung sensieren. Ein so festgestellter Wert wird vorzugsweise einem Steuergerät als Vorsteuerwert mitgeteilt. Ein solches Steuergerät kann aus diesen Werten dann Korrekturfaktoren berechnen, anhand derer dann anschließend auf die beispielsweise in Steuergerät-Kennfeldern abgelegten Werte der Brennkraftmaschine eingewirkt werden kann. Dies sind insbesondere Parameter wie zum Beispiel die Einspritzmenge, Luftmasse, Ladeluftsteller, EGR-Steller und dergleichen, insbesondere solche Parameter, die für die Abgasemissionen der Brenrkraftmaschine von Bedeutung sind.According to the invention, preference is given a sensor is used which has a typical IR-aromatics band and / or a typical C-H stretching vibration, especially for aliphatic HC, measures. The measurement of these IR bands is preferably done via laser diodes, the for These purposes can be specially adjusted. Preferably, a Calibration of the sensor made. This calibration happens in particular based on the unmixed fuel components. According to the invention you can preferably by means of suitable filtering extinction ratios at least two wavelengths and thereby reduce the content of e.g. a Fischer-Tropsch fuel admixture sensing. A value determined in this way is preferably a control unit as a precontrol value communicated. Such a controller can then use these values Calculate correction factors, based on which then subsequently on the example in control unit maps stored values of the internal combustion engine can be acted upon. These are in particular parameters such as the injection quantity, Air mass, charge air, EGR controller and the like, in particular such parameters for the exhaust emissions of the internal combustion engine are of importance.
Gegenstand der vorliegenden Erfindung ist weiterhin ein Sensor zur Verwendung in einem Verfahren zum Betrieb einer Brennkraftmaschine mit den Merkmalen des Anspruchs 21 sowie ein Sensor zur Verwendung in einem Verfahren zur Analyse der Zusammensetzung eines Kraftstoffs mit den Merkmalen des Anspruchs 22.object The present invention is further a sensor for use in a method for operating an internal combustion engine with the Features of claim 21 and a sensor for use in a Method of analyzing the composition of a fuel the features of claim 22.
Die in den Unteransprüchen genannten Merkmale betreffen bevorzugte Weiterbildungen der erfindungsgemäßen Aufgabenlösung. Weitere Vorteile der Erfindung ergeben sich aus der nachfolgenden Detailbeschreibung.The in the subclaims mentioned features relate to preferred developments of the task solution according to the invention. Further Advantages of the invention will become apparent from the following detailed description.
Nachfolgend wird die vorliegende Erfindung anhand eines Ausführungsbeispiels unter Bezugnahme auf die beiliegende Zeichnung näher erläutert. Dabei zeigenfollowing The present invention will be described by way of example with reference to FIG the enclosed drawing closer explained. Show
Die Zumischung von nennenswerten Anteilen von Kraftstoffkomponenten, welche sich in Dichte und Heizwert nennenswert von Dieselkraftstoff (DK) unterscheiden, verursacht Abweichungen in Bezug auf ein Ausweichen eines Motorsteuergeräts in nicht für die gefahrene Leistung geeignete Kennfelder für z.B. die Luftbemessung und die Abgasrückführung (exhaust gas recirculation EGR). Bei der Untersuchung von synthetischen Kraftstoffen aus Methan, z.B. Shell GtL bewirkte dies bei einigen der untersuchten Motoren zu hohe NOx-Emissionen. Dieses Problem konnte durch Anpassung der Kennfelder (Parameter für die Motorsteuerung) an den jeweils verwendeten Kraftstoff, der sich von herkömmlichem Dieselkraftstoff (DK) unterscheidet, gelöst werden. Es wurden bei einer Brennkraftmaschine Mischungen an Dieselkraftstoffen unterschiedlicher Zusammensetzungen eingesetzt, wobei ein Kraftstoffsensor verwendet wurde, der den Gehalt an unpolarer synthetischer Dieselkraftstoffbeimischung (SynFuel) misst und einem Motorsteuergerät mitteilt, worauf hin dieses dann geeignete Kennfelder für Einspritzmenge, Förderbeginn, Luftmasse und Abgasrückführung (EGR) ansteuerte.The admixture of significant proportions of fuel components, which differ significantly in density and calorific value of diesel fuel (DK), causes deviations in relation to an evasion of an engine control unit in not suitable for the power performance maps for example, the air measurement and exhaust gas recirculation EGR). In the investigation of synthetic fuels from methane, eg Shell GtL, this caused high NO x emissions in some of the engines investigated. This problem could be solved by adapting the maps (parameters for the engine control) to the used fuel, which differs from conventional diesel fuel (DK). In an internal combustion engine, mixtures of diesel fuels of different compositions were used, using a fuel sensor which measures the content of nonpolar synthetic diesel fuel admixture (SynFuel) and informs an engine control unit, whereupon this then suitable maps for injection quantity, start of delivery, air mass and exhaust gas recirculation (EGR ).
Der verwendete Kraftstoffsensor misst charakteristische Eigenschaften, die bei Dieselkraftstoff bzw. SynFuel unterschiedlich sind. Erfindungsgemäß wurde ein IR-Sensor verwendet, der bei zwei bestimmten Wellenlängen die IR-Extinktion misst und daraus ein Verhältnis bildet. Diese Verhältnisbildung führte zu charakteristischen Kennzahlen, aus denen sich mit hoher Genauigkeit eine Aussage über die Anteile einer Zumischung von SynFuel zu Dieselkraftstoff treffen ließ.Of the used fuel sensor measures characteristic properties, which are different for diesel fuel or SynFuel. According to the invention was uses an IR sensor, the at two specific wavelengths Measures the IR absorbance and forms a relationship. This ratio formation led to characteristic metrics that make up with high accuracy a statement about the proportions of adding SynFuel to diesel fuel left.
Im untersuchten Fall wurden IR-Spektren von Dieselkraftstoff, SynFuel sowie einigen Mischungen daraus analysiert. Nach dem Lambert-Beer'schen Gesetz E = ε1∙c∙d (mit ε1 = Extinktionskoeffizient) ist die Extinktion einer Probe proportional dem Produkt aus Konzentration c und Schichtdicke d. Durch Verhältnisbildung lässt sich der Term der Schichtdicke eliminieren. Aus den Extinktionsverhältnissen der Banden bei 1606 cm–1 und 721 cm–1 (E1606/E721) sowie bei 1606 cm–1 und 1379 cm–1 (E1606/E1379) wurden Kalibrierbeziehungen der Form E1606/En = AA + B∙DK ermittelt (mit AA: Achsenabschnitt, B: Steigung).In the investigated case, IR spectra of diesel fuel, SynFuel and some mixtures were analyzed. According to Lambert-Beer's law E = ε 1 ∙ c ∙ d (with ε 1 = extinction coefficient), the extinction of a sample is proportional to the product of concentration c and layer thickness d. By ratioing, the term of the layer thickness can be eliminated. From the extinction ratios of the bands at 1606 cm -1 and 721 cm -1 (E 1606 / E 721 ) and at 1606 cm -1 and 1379 cm -1 (E 1606 / E 1379 ), calibration relationships of the form E 1606 / E n = AA + B ∙ DK determined (with AA: intercept, B: slope).
Damit ließen sich Gehalte von SynFuel in Dieselkraftstoff mit einer guten Aussagesicherheit ermitteln: das Bestimmtheitsmaß (R2) betrug dabei 0.999. Es wurden zwei Kalibrierbeziehungen mit jeweils drei Freiheitsgraden ermittelt; die damit erreichbare Genauigkeit der Bestimmung des Gehaltes an Dieselkraftstoff wurde über eine Fehlerfortpflanzungsrechnung zu 6 bis 7 % ermittelt. Die Berechnungen dazu finden sich im nachfolgenden Abschnitt „Korrelationsberechnung". Bei einer Vergrößerung der Stichprobe, d.h. bei mehr untersuchten Mischungszusammensetzungen, ist zu erwarten, dass der Gehalt an Dieselkraftstoff mit einer Ungenauigkeit von weniger als 5 % ermittelt werden kann.Salts from SynFuel in diesel fuel with a good reliability could thus be determined: the coefficient of determination (R 2 ) was 0.999. Two calibration relationships with three degrees of freedom were determined; the resulting accuracy of the determination of the content of diesel fuel was determined by an error propagation calculation to 6 to 7%. The calculations can be found in the following section "Correlation Calculation." If the sample size is increased, ie if more than one of the mixture compositions is investigated, it is to be expected that the content of diesel fuel can be determined with an inaccuracy of less than 5%.
Nachfolgend
wird unter Bezugnahme auf
Nachfolgend
wird die erfindungsgemäße Bestimmung
eines Gehalts an SynFuel in einem Dieselkraftstoff unter Bezugnahme
auf die
In
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- 1010
- Sensorsensor
- 1111
- Brennkraftmaschine (Motor)Internal combustion engine (Engine)
- 1212
- KraftstofftankFuel tank
- 1313
- EGR-StellgrößeEGR control value
- 1414
- Steuergerätcontrol unit
- 1515
- EGR-Kennfeld (aromatenhaltiger Dieselkraftstoff)EGR map (aromatics containing diesel fuel)
- 1616
- EGR-Kennfeld (SynFuel)EGR map (SynFuel)
- 1717
- Zulaufleitungsupply line
- 1818
- RücklaufleitungReturn line
Claims (22)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE102005001882.3A DE102005001882B4 (en) | 2005-01-14 | 2005-01-14 | Method for operating an internal combustion engine |
Applications Claiming Priority (1)
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DE102007031770A1 (en) * | 2007-07-07 | 2009-01-08 | Deutz Ag | Internal combustion engine i.e. self-ignited internal combustion engine, operating method for agricultural machine, involves determining fuel characteristics, feeding measuring signal, and taking place influence of injection amount |
DE102008003260A1 (en) * | 2008-01-04 | 2009-07-09 | Eoil Automotive & Technologies Gmbh | Method and device for metering the delivery of a urea solution |
DE102008006798B3 (en) * | 2008-01-30 | 2009-08-27 | Crop-Oil Ltd. | Internal combustion engine operating device for use in motor vehicle, has control unit for controlling circuit breakers and alarm system, such that circuit breakers and alarm system are activated, when sensor not detects mark added to fuel |
DE102008002476A1 (en) | 2008-06-17 | 2009-12-24 | Robert Bosch Gmbh | Fuel e.g. petrol, composition and/or quantity determining method for internal combustion engine of motor vehicle, involves calculating carbon and hydrogen content and/or quantity of fuel from measured water and carbon dioxide contents |
DE102008054379A1 (en) | 2008-12-08 | 2010-06-10 | Robert Bosch Gmbh | Measuring device for measuring fuel composition in air compressed, self-igniting internal combustion engine of motor vehicle, has sensor device radiating and receiving radiation, and analyzing device performing radiation spectrum analysis |
EP1975510B1 (en) | 2007-03-28 | 2016-07-06 | Eberspächer Climate Control Systems GmbH & Co. KG | Fuel-powered heating system, in particular for a vehicle |
DE102018202817A1 (en) * | 2018-02-26 | 2018-11-22 | Continental Automotive Gmbh | A method for determining the composition of a fuel mixture for an internal combustion engine and use of a device therefor |
DE102018202816A1 (en) * | 2018-02-26 | 2019-08-29 | Continental Automotive Gmbh | Method for operating an internal combustion engine |
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DE102008002476A1 (en) | 2008-06-17 | 2009-12-24 | Robert Bosch Gmbh | Fuel e.g. petrol, composition and/or quantity determining method for internal combustion engine of motor vehicle, involves calculating carbon and hydrogen content and/or quantity of fuel from measured water and carbon dioxide contents |
DE102008054379A1 (en) | 2008-12-08 | 2010-06-10 | Robert Bosch Gmbh | Measuring device for measuring fuel composition in air compressed, self-igniting internal combustion engine of motor vehicle, has sensor device radiating and receiving radiation, and analyzing device performing radiation spectrum analysis |
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