EP0079078B1 - Electronically controlled fuel injection device - Google Patents

Electronically controlled fuel injection device Download PDF

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Publication number
EP0079078B1
EP0079078B1 EP82110303A EP82110303A EP0079078B1 EP 0079078 B1 EP0079078 B1 EP 0079078B1 EP 82110303 A EP82110303 A EP 82110303A EP 82110303 A EP82110303 A EP 82110303A EP 0079078 B1 EP0079078 B1 EP 0079078B1
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Prior art keywords
fuel injection
fact
injection device
spectrometer
several
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German (de)
French (fr)
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EP0079078A1 (en
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Roland Bause
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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
    • F02D41/02—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
    • F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
    • F02D41/144—Sensor in intake manifold

Definitions

  • the invention relates to an electronically controlled fuel injection system for mixture-compressing, spark-ignition internal combustion engines with the features of the preamble of claim 1.
  • Known injection systems of this type consist essentially of an exhaust pipe which is connected to at least one combustion chamber of the engine via the inlet valve path.
  • the fuel is injected into the intake pipe via an electronically controllable injection valve, the control of the injection valve being carried out by means of an electronic control circuit which reacts to a measuring device which in turn is arranged in the intake pipe.
  • the measuring device is designed, for example, as a hot wire, which is supplied with current at a specific target temperature (approximately 200 ° C.). Heat is removed from the hot wire by the air flow in the exhaust pipe, so that it tends to cool down.
  • a thermal sensor is attached in the immediate vicinity of or on the hot wire, with which the temperature of the hot wire is measured.
  • the temperature-dependent voltage of the thermal sensor is input into the electronic control circuit, which in turn - depending on the thermal voltage - controls the current flowing through the hot wire so that the temperature of the hot wire is kept constant at the target temperature.
  • the electronic control circuit now regulates the injection valve in such a way that the amount of fuel supplied to the intake pipe is adapted to the amount of air drawn in and an optimally possible combustion mixture is achieved.
  • a control system for controlling the fuel-air mixture in the intake duct of an internal combustion engine is known from GB-A-2052 108.
  • An oxygen-sensitive sensor for the air-fuel ratio protrudes into the mixture flow.
  • a fraction of the mixture is ignited by means of an ignition device and the resulting combustion gas is fed to the oxygen sensor, which is of the type of a concentration chain with a solid electrolyte.
  • a voltage value which is provided by the sensor and which is representative of the fuel-air ratio is processed in a control circuit which compares the mixture-dependent electrical output signals of the measuring device with a presettable target value.
  • a disadvantage of the known systems is that the measuring element physically present in the intake duct has a disadvantageous effect on the flow conditions in the intake pipe and, furthermore, adjustment of the system is absolutely necessary from time to time, since in the known system only one of the two parameters air quantity / fuel quantity , namely the amount of air is measured.
  • the necessary adjustment is usually carried out by measuring the CO content of the exhaust gas while the engine is running and inferring the mixture composition from the CO content.
  • the invention has for its object to provide a fuel injection system that does not get into the intake duct or through protruding sensing elements and ensures direct and complete measurement of the mixture composition independent of engine parameters or wear and adjustment phenomena optimal mixture setting.
  • the measuring device is an electro-optical spectrometer arranged in the wall area of the intake pipe radially outside the clear pipe cross section, which uses its light source and its detector to analyze the composition of the fuel-air mixture sucked in by the engine (fuel-air).
  • the electronic circuit compares the mixture-dependent electrical output signals of the spectrometer with a preset target value.
  • Their shape and installation position can be chosen so that the wall of the intake pipe is smooth and continuous at this point. It is also advantageous that the injection system according to the invention can be used for all mixture-compressing internal combustion engines without adjustment work. It is even possible to retrofit internal combustion engines that are already in operation with this spectrally analytically controlled fuel injection system without any great technical effort.
  • the spectrometer is provided with a narrow-band or monochromatic light source, the wavelength of which - for example by filtering - corresponds to the wavelength which is completely or partially absorbed by an optimally composed fuel-air mixture.
  • a photoelectric component for example a photo element or photodiode, is used as the sensor, the spectral sensitivity of which is adapted to the selected light wavelength.
  • Emission spectrometers and extinction spectrometers analogous to claim 3 can be used, it is also within the scope the invention to carry out the measurement nephelometrically or colorimetrically, ie to determine the “amount of droplets” or the “color density” in the air / fuel mixture and to use this variable to control the injection valve.
  • claims 4 and 5 describe advantageous geometric conditions for the passage of light through the fuel-air mixture.
  • the subject matter of the invention is carried out in accordance with claim 4, if a particularly short penetration path for the light beam is expedient, if a particularly long interaction path between the optically active medium and the light beam is required due to mixture-related requirements, an advantageous further development is to be selected in accordance with claim 5.
  • Claims 7 and 8 teach measures which are advantageous for achieving a favorable signal-smoke ratio during the measurement and by means of which the fuel mixture can be precisely regulated.
  • the phase and / or frequency selective “lock-in technology” can be used to easily eliminate disturbing motor vibration signals from the measurement signal.
  • Claims 9 and 10 further teach to superimpose or supplement the basic signal determined by spectroscopy with further signals, for example in the cold running or idling phase of the engine.
  • the drawing shows a schematic representation of an intake pipe with a spectrometer arrangement and an injection valve as well as the circuit arrangement.
  • the electronically controlled fuel injection system essentially consists of an intake pipe 1, on which an electronically controllable injection valve 2, which is connected to the fuel line 3, is arranged laterally in the usual way.
  • the fuel supplied creates a gasoline-air mixture inside the intake pipe, the composition of which depends on the opening time of the injection valve.
  • the opening time of the injection valve 2 is regulated via a control line 4, which is connected to the output 5 of an electronic control circuit 6.
  • the spectrometer 7 consists essentially of a light source 8 and a spectral filter 9 optically adjusted to the light source in the beam path, which only allows light of a very specific wavelength to pass through.
  • the light beam 10 passes through the intake pipe at a right angle and strikes the light-sensitive detector 11 which is arranged on the opposite side of the intake pipe 1 and which, depending on the irradiated intensity, generates an electrical voltage signal which is fed via the signal line 12 to the signal input 13 of the electrical control circuit 6.
  • the signal generated by the detector is compared with a setpoint to be determined once, the opening time of the injection valve being readjusted (lengthened or shortened) via the control line depending on the deviation from the setpoint.

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  • 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)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Description

Die Erfindung betrifft eine elektronisch gesteuerte Kraftstoffeinspritzanlage für gemischverdichtende, fremdzündende Verbrennungskraftmaschinen mit den Merkmalen des Oberbegriffes des Anspruches 1. Bekannte Einspritzanlagen dieser Art bestehen im wesentlichen aus einem Ausaugrohr, das über den Einlaßventilweg mit mindestens einer Brennkammer des Motors verbunden ist. Der Kraftstoff wird über ein elektronisch steuerbares Einspritzventil in das Ansaugrohr eingespritzt, wobei die Steuerung des Einspritzventiles mittels einer elektronischen Steuerschaltung vollzogen wird, die auf eine Meßvorrichtung reagiert, die ihrerseits im Ansaugrohr angeordnet ist. Die Meßvorrichtung ist beispielsweise als Hitzedraht ausgebildet, der stromgespeist auf einer ganz bestimmten Solltemperatur (ungefähr 200 °C) gehalten wird. Durch den Lufstrom im Ausaugrohr wird von dem Hitzedraht Wärme abgeführt, so daß dieser zum Abkühlen tendiert. Um die Temperatur des Hitzedrahtes konstant zu regeln, ist in unmittelbarer Nähe des Hitzedrahtes oder an diesem ein Thermofühler angebracht, mit welchem die Temperatur des Hitzedrahtes gemessen wird. Die temperaturabhängige Spannung des Thermofühlers wird in die elektronische Regelschaltung eingegeben, die wiederum - abhängig von der Thermospannung - den durch den Hitzedraht fließenden Strom so regelt, daß die Temperatur des Hitzedrahtes konstant auf der Solltemperatur gehalten wird. Je höher der Luftdurchsatz durch das Ansaugrohr ist, desto höher ist der Regelstrom, so daß der Regelstrom eine Bezugsgröße für den Luftdurchsatz für das Ansaugrohr ist. Die elektronische Steuerschaltung regelt nun das Einspritzventil so, daß die dem Ansaugrohr zugeführte Kraftstoffmenge an die angesaugte Luftmenge angepaßt und ein möglichst optimales Verbrennungsgemisch erzielt wird.The invention relates to an electronically controlled fuel injection system for mixture-compressing, spark-ignition internal combustion engines with the features of the preamble of claim 1. Known injection systems of this type consist essentially of an exhaust pipe which is connected to at least one combustion chamber of the engine via the inlet valve path. The fuel is injected into the intake pipe via an electronically controllable injection valve, the control of the injection valve being carried out by means of an electronic control circuit which reacts to a measuring device which in turn is arranged in the intake pipe. The measuring device is designed, for example, as a hot wire, which is supplied with current at a specific target temperature (approximately 200 ° C.). Heat is removed from the hot wire by the air flow in the exhaust pipe, so that it tends to cool down. In order to regulate the temperature of the hot wire constantly, a thermal sensor is attached in the immediate vicinity of or on the hot wire, with which the temperature of the hot wire is measured. The temperature-dependent voltage of the thermal sensor is input into the electronic control circuit, which in turn - depending on the thermal voltage - controls the current flowing through the hot wire so that the temperature of the hot wire is kept constant at the target temperature. The higher the air throughput through the intake pipe, the higher the control flow, so that the control flow is a reference quantity for the air throughput for the intake pipe. The electronic control circuit now regulates the injection valve in such a way that the amount of fuel supplied to the intake pipe is adapted to the amount of air drawn in and an optimally possible combustion mixture is achieved.

Weiterhin ist aus der GB-A-2052 108 ein Kontrollsystem zur Steuerung des Kraftstoff-Luft-Gemisches im Ansaugkanal einer Verbrennungskraftmaschine bekannt. Dabei ragt ein sauerstoffempfindlicher Sensor für das Luft-KraftstoffVerhältnis in den Gemischstrom hinein. Mittels einer Zündvorrichtung wird ein Bruchteil des Gemisches entzündet und das resultierende Verbrennungs- gas dem Sauerstoffsensor zugeführt, der von der Art einer Konzentrationskette mit einem Festkörperelektrolyten ist. Ein vom Sensor bereitgestellter, für das Kraftstoff-Luft-Verhältnis repräsentativer Spannungswert wird in einer Steuerschaltung verarbeitet, die die gemischabhängigen, elektrischen Ausgangssignale der Meßvorrichtung mit einem voreinstellbaren Sollwert vergleicht.Furthermore, a control system for controlling the fuel-air mixture in the intake duct of an internal combustion engine is known from GB-A-2052 108. An oxygen-sensitive sensor for the air-fuel ratio protrudes into the mixture flow. A fraction of the mixture is ignited by means of an ignition device and the resulting combustion gas is fed to the oxygen sensor, which is of the type of a concentration chain with a solid electrolyte. A voltage value which is provided by the sensor and which is representative of the fuel-air ratio is processed in a control circuit which compares the mixture-dependent electrical output signals of the measuring device with a presettable target value.

Nachteilig an den bekannten Anlagen ist, daß sich das im Ansaugkanal körperlich vorhandene Meßorgan nachteilig auf die Strömungsverhältnisse im Ansaugrohr auswirkt und weiterhin ein Abgleich der Anlage von Zeit zu Zeit unumgänglich notwendig ist, da bei der bekannten Anlage nur einer der beiden Parameter Luftmenge/-Kraftstoffmenge, nämlich die Luftmenge gemessen wird. Der notwendige Abgleich wird in der Regel dadurch vollzogen, daß bei laufendem Motor der CO-Gehalt des Abgases gemessen wird und vom CO-Gehalt auf die Gemischzusammensetzung rückgeschlossen wird.A disadvantage of the known systems is that the measuring element physically present in the intake duct has a disadvantageous effect on the flow conditions in the intake pipe and, furthermore, adjustment of the system is absolutely necessary from time to time, since in the known system only one of the two parameters air quantity / fuel quantity , namely the amount of air is measured. The necessary adjustment is usually carried out by measuring the CO content of the exhaust gas while the engine is running and inferring the mixture composition from the CO content.

Der Erfindung liegt die Aufgabe zugrunde, eine Kraftstoffeinspritzanlage zu schaffen, die ohne in den Ansaugkanal hinein- oder durch diesen hindurchstehende Fühlelemente auskommt und durch unmittelbare und vollständige Messung der Gemischzusammensetzung eine von Motorparametern oder Verschleiß- und Verstellerscheinungen unabhängige optimale Gemischeinstellung gewährleistet.The invention has for its object to provide a fuel injection system that does not get into the intake duct or through protruding sensing elements and ensures direct and complete measurement of the mixture composition independent of engine parameters or wear and adjustment phenomena optimal mixture setting.

Die Erfindung wird dadurch gelöst, daß die Meßvorrichtung ein im Wandungsbereich des Ansaugrohres radial außerhalb des lichten Rohrquerschnittes angeordnetes elektro-optisches Spektrometer ist, welches mithilfe seiner Lichtquelle und seines Detektors das vom Motor angesaugte Kraftstoff-Luftgemisch auf seine Zusammensetzung (Kraftstoff-Luft) analysiert. Die elektronische Schaltung vergleicht die gemischabhängigen elektrischen Ausgangssignale des Spektrometers mit einem voreinstellbaren Sollwert. Vorteilhaft an der Kraftstoffeinspritzanlage ist zunächst, daß das Ansaugsystem optimal strömungstechnisch gestaltet werden kann, da keine mechanischen Meßorgane im Ansaugkanal notwendig sind. Die Lichtquelle des Spektrometers sowie das lichtempfindliche Element werden außerhalb des Ansaugrohrquerschnittes angeordnet derart, daß der Lichtstrahl die Ansaugrohrwandung mittels Fenstern o. dgl. durchsetzt. Deren Form und Einbaustellung kann so gewählt werden, daß die Wandung des Ansaugrohres an dieser Stelle glatt durchgehend ausgebildet ist. Weiterhin vorteilhaft ist, daß die erfindungsgemäße Einspritzanlage für alle gemischverdichtenden Verbrennungskraftmaschinen ohne Abstimmarbeiten verwendbar ist. Es ist sogar möglich, ohne hohen technischen Aufwand bereits im Betrieb befindliche Verbrennungskraftmaschinen mit dieser spektralanalytisch gesteuerten kraftstoffeinspritzanlage nachzurüsten.The invention is achieved in that the measuring device is an electro-optical spectrometer arranged in the wall area of the intake pipe radially outside the clear pipe cross section, which uses its light source and its detector to analyze the composition of the fuel-air mixture sucked in by the engine (fuel-air). The electronic circuit compares the mixture-dependent electrical output signals of the spectrometer with a preset target value. An advantage of the fuel injection system is first of all that the intake system can be optimally designed in terms of flow technology, since no mechanical measuring elements are necessary in the intake duct. The light source of the spectrometer and the light-sensitive element are arranged outside the intake pipe cross-section such that the light beam passes through the intake pipe wall by means of windows or the like. Their shape and installation position can be chosen so that the wall of the intake pipe is smooth and continuous at this point. It is also advantageous that the injection system according to the invention can be used for all mixture-compressing internal combustion engines without adjustment work. It is even possible to retrofit internal combustion engines that are already in operation with this spectrally analytically controlled fuel injection system without any great technical effort.

Im einfachsten Falle ist entsprechend dem Kennzeichnungsmerkmal des Anspruches 2 das Spektrometer mit einer schmalbandigen oder monochromatischen Lichtquelle versehen, deren Wellenlänge - beispielsweise durch Filterung - der Wellenlänge entspricht, die von einem optimal Zusammengesetzten Kraftstoff-Luftgemisch ganz oder teilweise absorbiert wird. Als Sensor dient ein fotoelektrisches Bauteil, beispielsweise Fotoelement oder Fotodiode, deren spektrale Empfindlichkeit der gewählten Lichtwellenlänge angepaßt ist. Es können Emissionsspektrometer sowie Extinktionsspektrometer analog Anspruch 3 Anwendung finden, es liegt auch im Rahmen der Erfindung, die Messung nephelometrisch oder colorimetrisch vorzunehmen, d. h. die « Tröpfchenmenge » ouer die « Farbdichte » im Luft-Kraftstoffgemisch zu bestimmen und mittels dieser Größe die Einspritzventilsteuerung vorzunehmen.In the simplest case, according to the characterizing feature of claim 2, the spectrometer is provided with a narrow-band or monochromatic light source, the wavelength of which - for example by filtering - corresponds to the wavelength which is completely or partially absorbed by an optimally composed fuel-air mixture. A photoelectric component, for example a photo element or photodiode, is used as the sensor, the spectral sensitivity of which is adapted to the selected light wavelength. Emission spectrometers and extinction spectrometers analogous to claim 3 can be used, it is also within the scope the invention to carry out the measurement nephelometrically or colorimetrically, ie to determine the “amount of droplets” or the “color density” in the air / fuel mixture and to use this variable to control the injection valve.

Die kennzeichnenden Merkmale der Ansprüche 4 bzw. 5 beschreiben vorteilhafte geometrische Bedingungen für den Lichtdurchgang durch das Kraftstoff-Luft-Gemisch. Der Erfindungsgegenstand wird entsprechend dem Anspruch 4 ausgeführt, wenn ein besonders kurzer Durchdringungsweg für den Lichtstrahl sinnvoll ist, ist aufgrund gemischbedingter Anforderungen ein besonders langer Wechselwirkungsweg zwischen dem optisch wirkenden Medium und dem Lichtstrahl verlangt, so ist eine vorteilhafte Weiterbildung entsprechend Anspruch 5 zu wählen.The characterizing features of claims 4 and 5 describe advantageous geometric conditions for the passage of light through the fuel-air mixture. The subject matter of the invention is carried out in accordance with claim 4, if a particularly short penetration path for the light beam is expedient, if a particularly long interaction path between the optically active medium and the light beam is required due to mixture-related requirements, an advantageous further development is to be selected in accordance with claim 5.

Es liegt auch im Rahmen der Erfindung, in jeder der beiden Gemischkomponenten durch zwei Lichtstrahlen entsprechend Anspruch 6 unterschiedlicher Wellenlänge, Übergänge, Schwingungen oder Rotationen unterschiedlicher Moleküle oder Atome anzuregen und aus dem Verhältnis der beiden getrennt gemessenen Signale die jeweilige Gemischzusammensetzung zu ermitteln bzw. über das Einspritzventil zu regeln.It is also within the scope of the invention to excite in each of the two mixture components by two light beams according to claim 6 different wavelengths, transitions, vibrations or rotations of different molecules or atoms and to determine the respective mixture composition from the ratio of the two separately measured signals or via the To regulate the injection valve.

Die Ansprüche 7 und 8 lehren Maßnahmen, die zum Erzielen eines güngstigen Signal-Rauchverhältnisses bei der Messung vorteilhaft sind und durch welche eine genaue Regelung des Kraftstoffgemisches erfolgen kann. Insbesondere durch die phasen- und/oder frequenzselektive « Lock-in-Technologie» können störende Motorvibrationssignale leicht aus dem Messignal eliminiert werden. Die Ansprüche 9 und 10 lehren weiterhin, das spektroskopisch ermittelte Grundsignal durch weitere Signale zu überlagern oder zu ergänzen, beispielsweise in der Kaltlauf- oder Leerlaufphase des Motors.Claims 7 and 8 teach measures which are advantageous for achieving a favorable signal-smoke ratio during the measurement and by means of which the fuel mixture can be precisely regulated. In particular, the phase and / or frequency selective “lock-in technology” can be used to easily eliminate disturbing motor vibration signals from the measurement signal. Claims 9 and 10 further teach to superimpose or supplement the basic signal determined by spectroscopy with further signals, for example in the cold running or idling phase of the engine.

Die Erfindung wird im folgenden anhand eines in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert. Die Zeichnungsfigur zeigt in schematischer Darstellung ein Ansaugrohr mit Spektrometeranordnung und Einspritzventil sowie die Schaltungsanordnung.The invention is explained below with reference to an embodiment shown in the drawing. The drawing shows a schematic representation of an intake pipe with a spectrometer arrangement and an injection valve as well as the circuit arrangement.

Die elektronisch gesteuerte Kraftstoffeinspritzanlage besteht im wesentlichen aus einem Ansaugrohr 1, an welchem in üblicher Weise seitlich ein elektronisches steuerbares Einspritzventil 2 angeordnet ist, welches mit der Kraftstoffleitung 3 verbunden ist. Durch den zugeführten Kraftstoff wird im Inneren des Ansaugrohres ein Benzin-Luftgemisch erzeugt, dessen Zusammensetzung von der Öffnungszeit des Einspritzventiles abhängig ist. Die Öffnungszeit des Einspritzventils 2 wird über eine Steuerleitung 4 geregelt, die mit dem Ausgang 5 einer elektronischen Steuerschaltung 6 verbunden ist.The electronically controlled fuel injection system essentially consists of an intake pipe 1, on which an electronically controllable injection valve 2, which is connected to the fuel line 3, is arranged laterally in the usual way. The fuel supplied creates a gasoline-air mixture inside the intake pipe, the composition of which depends on the opening time of the injection valve. The opening time of the injection valve 2 is regulated via a control line 4, which is connected to the output 5 of an electronic control circuit 6.

Das Spektrometer 7 besteht im wesentlichen aus einer Lichtquelle 8 und einem der Lichtquelle im Strahlengang optisch nachgestellten Spektralfilter 9, welches nur Licht einer ganz bestimment Wellenlänge durchläßt. Der Lichtstrahl 10 durchsetzt das Ansaugrohr rechtwinklig und trifft auf den auf der gegenüberliegenden Seite des Ansaugrohres 1 angeordneten lichtempfindlichen Detektor 11, welcher abhängig von der eingestrahlten Intensität ein elektrisches Spannungssignal erzeugt, welches über die Signalleitung 12 dem Signaleingang 13 der elektrischen Steuerschaltung 6 zugeführt wird.The spectrometer 7 consists essentially of a light source 8 and a spectral filter 9 optically adjusted to the light source in the beam path, which only allows light of a very specific wavelength to pass through. The light beam 10 passes through the intake pipe at a right angle and strikes the light-sensitive detector 11 which is arranged on the opposite side of the intake pipe 1 and which, depending on the irradiated intensity, generates an electrical voltage signal which is fed via the signal line 12 to the signal input 13 of the electrical control circuit 6.

In der Steuerschaltung wird das vom Detektor erzeugte Signal mit einem einmal zu ermittelnden Sollwert verglichen, wobei abhängig von der Abweichung vom Sollwert die Öffnungszeit des Einspritzventiles über die Steuerleitung nachgeregelt (verlängert oder verkürzt) wird.

Figure imgb0001
In the control circuit, the signal generated by the detector is compared with a setpoint to be determined once, the opening time of the injection valve being readjusted (lengthened or shortened) via the control line depending on the deviation from the setpoint.
Figure imgb0001

Claims (10)

1. Electronically controlled fuel injection device for mixture-compression spark-ignition combustion engines with
- at least one suction tube (1) connected over the intake valve path with at least one combustion chamber of the engine,
- an injection valve (2) situated on the suction tube and electrically controllable, for feeding the fuel,
- a measuring device, acting in the suction tube (1), analysing the composition of the fuel-air mixture taken in by the motor, as well as
- an electronic control circuit (6) - its input being effectively connected with the measuring organ and its output with the injection valve - which compares the mixture-depending electrical output signals of the measuring device with a reference value to be preset, characterized by the fact that the measuring device is an electro- optical spectrometer (7) whose light source (8) or detector (11) is situated radially in the wall of the suction tube (1) out of the inner cross section of this tube.
2. Fuel injection device according to claim 1, characterized by the fact that the spectrometer (7) is an emission spectrometer with a narrow-band or monochromatic light source (8).
3. Fuel injection device according to claim 1, characterized by the fact that the spectrometer (7) is an extinction spectrometer.
4. Fuel injection device according to one or several of the preceding claims, characterized by the fact that the light beam (10) of the spectrometer (7) passes through the suction tube (1) at about a right angle.
5. Fuel injection device according to one or several of the claims 1 to 3, characterized by the fact that the light beam (10) of the spectrometer (7) passes through the suction tube (1) at an acute angle to the axis of the tube.
6. Fuel injection device according to one or several of the preceding claims, characterized by the fact that two light beams (10) of different wavelength for exciting different kinds of atoms/molecules pass through the suction tube (1
7. Fuel injection device according to one or several of the preceding claims, characterized by the fact that the light source (8) is a pulsed light source of high power.
8. Fuel injection device according to one or several of the preceding claims, characterized by the fact that measurement is effected by phase and/or frequency selection.
9. Fuel injection device according to one or several of the preceding claims, characterized by the fact that the electronic control circuit (6) uses further motor parameters for the control of the injection valve/valves (2).
10. Fuel injection device according to one or several of the preceding claims, characterized by the fact that during the starting and idling phases the output signal of the electronic control circuit (6) is overlaid by other signals.
EP82110303A 1981-11-10 1982-11-09 Electronically controlled fuel injection device Expired EP0079078B1 (en)

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Application Number Priority Date Filing Date Title
DE3144667 1981-11-10
DE19813144667 DE3144667A1 (en) 1981-11-10 1981-11-10 SPECTRAL-ANALYTICALLY CONTROLLED ELECTRONIC FUEL INJECTION SYSTEM FOR MIXTURE-COMPRESSING COMBUSTION ENGINES

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EP0079078A1 EP0079078A1 (en) 1983-05-18
EP0079078B1 true EP0079078B1 (en) 1986-05-07

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JP2829161B2 (en) * 1991-09-18 1998-11-25 三菱電機株式会社 Ignition timing control device for internal combustion engine

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FR2233497A1 (en) * 1973-06-15 1975-01-10 Sopromi Soc Proc Modern Inject Control of fuel-injection for I.C. engines - has sensors for indication of partial pressure of oxygen and R.P.M.
JPS562438A (en) * 1979-06-22 1981-01-12 Nissan Motor Co Ltd Mixing ratio controller for internal combustion engine
NL191373C (en) * 1980-07-15 1995-06-16 Tno Device for controlling the fuel supply to an internal combustion engine.

Also Published As

Publication number Publication date
JPS58501914A (en) 1983-11-10
EP0079078A1 (en) 1983-05-18
DE3271044D1 (en) 1986-06-12
WO1983001655A1 (en) 1983-05-11
DE3144667A1 (en) 1983-05-26

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