EP3329109A1 - Method for compensating valve drift in an internal combustion engine - Google Patents

Method for compensating valve drift in an internal combustion engine

Info

Publication number
EP3329109A1
EP3329109A1 EP16735996.7A EP16735996A EP3329109A1 EP 3329109 A1 EP3329109 A1 EP 3329109A1 EP 16735996 A EP16735996 A EP 16735996A EP 3329109 A1 EP3329109 A1 EP 3329109A1
Authority
EP
European Patent Office
Prior art keywords
internal combustion
combustion engine
air
mass flow
map
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Withdrawn
Application number
EP16735996.7A
Other languages
German (de)
French (fr)
Inventor
Jan Boyde
Wolfgang Fimml
Erika SCHÄFER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rolls Royce Solutions GmbH
Original Assignee
MTU Friedrichshafen GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by MTU Friedrichshafen GmbH filed Critical MTU Friedrichshafen GmbH
Publication of EP3329109A1 publication Critical patent/EP3329109A1/en
Withdrawn legal-status Critical Current

Links

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
    • F02D41/02—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0223—Variable control of the intake valves only
    • 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
    • F02D41/1486—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor with correction for particular operating conditions
    • 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
    • F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
    • 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
    • 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
    • F02D2041/001—Controlling intake air for engines with variable valve actuation
    • 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
    • F02D2200/04—Engine intake system parameters
    • F02D2200/0411—Volumetric efficiency
    • 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
    • F02D41/0007—Controlling intake air for control of turbo-charged or super-charged engines
    • 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
    • F02D41/0027—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures the fuel being gaseous
    • 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
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the method according to the invention is carried out during a stationary operating state of the internal combustion engine.
  • This stationary operating state is present in particular when the operation does not undergo any load change over a period of time greater than 30 seconds. It can also be provided that, according to the invention, a stationary state in a quiet motor phase of a few minutes is awaited until the measurement according to the invention takes place.
  • the boost pressure and / or the rotational speed of the internal combustion engine can be changed or corrected to compensate for the valve drift.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Measuring Volume Flow (AREA)

Abstract

The invention relates to a method for compensating valve drift in an internal combustion engine having a variable valve train; in said method, an actual value of the current operating state of the internal combustion engine is determined in an air expenditure map and compared to a desired value of the air expenditure map, whereupon the air expenditure map is corrected.

Description

BESCHREIBUNG Verfahren zur Kompensation eines Ventildrifts einer Brennkraftmaschine  DESCRIPTION Method for compensating a valve drift of an internal combustion engine
Die Erfindung bezieht sich auf ein Verfahren zur Kompensation eines Ventildrifts einer Brennkraftmaschine mit variablem Ventiltrieb. The invention relates to a method for compensating a valve drive of an internal combustion engine with a variable valve train.
Bei Brennkraftmaschinen, welche mit Gas betrieben werden, wird die erforderliche Gemischmasse aus Luft und Gas mit Hilfe eines Luftaufwandkennfeldes ermittelt. Eine derartige Motorsteuerung funktioniert bei einem starren Ventiltrieb sehr zuverlässig. In internal combustion engines, which are operated with gas, the required mixture mass of air and gas is determined by means of an air effort map. Such a motor control works very reliably in a rigid valve train.
Bei einem variablen Ventiltrieb ergeben sich jedoch während des Betriebs der Brennkraftmaschine Veränderungen beim Ventilverhalten. Diese werden auch als Ventildrift bezeichnet. Diese Veränderungen können durch äußere Einflüsse bedingt sein oder durch Alterungsprozesse bei einem Ventil oder der Ventilsteuerung, wodurch sich Änderungen des Öffhungsverhaltens oder des Schließverhaltens ergeben. So können die Veränderungen beim Ventilverhalten beispielsweise durch die hydraulischen Komponenten oder durch die zu bewegenden Massen hervorgerufen sein. Weitere Ursachen können z.B. Änderungen der Reibungsverhältnisse, Verschleiß der Ventilteller oder Oberflächenaufrauhungen der Ventilteller sein. Die Folge hiervon ist, dass das Luftaufwandkennfeld nicht mehr aktuell ist und damit die Gemischmasse nicht mehr genügend genau bestimmt werden kann. Dies beeinflusst das Laufverhalten der Brennkraftmaschine und deren Wirkungsgrad. Eine nicht an die jeweiligen Betriebsbedingungen der Brennkraftmaschme angepasste Gemischmasse führt zu Klopfen oder zu Aussetzern. In a variable valve train, however, changes occur during operation of the internal combustion engine in the valve behavior. These are also called valve drift. These changes may be due to external influences or aging processes in a valve or the valve control, resulting in changes in the Öffhungsverhaltens or closing behavior. For example, the changes in the valve behavior may be caused by the hydraulic components or by the masses to be moved. Other causes may be e.g. Changes in friction conditions, wear of the valve disk or surface roughening of the valve disc be. The consequence of this is that the air effort map is out of date and thus the mixture mass can not be determined with sufficient accuracy. This influences the running behavior of the internal combustion engine and its efficiency. A mixture mass which is not adapted to the respective operating conditions of the internal combustion engine leads to knocking or dropouts.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Kompensation eines Ventildrifts einer Brennkraftmaschine zu schaffen, welches bei einfachem Aufbau und einfacher, kostengünstiger Umsetzbarkeit eine exakte Gemischmengenzufuhr ermöglicht. The invention has for its object to provide a method for compensating a valve drift of an internal combustion engine, which allows a simple design and simple, cost-effective implementation of an exact mixture quantity supply.
Erfindungsgemäß wird die Aufgabe durch die Merkmalskombination des Anspruchs 1 gelöst, die Unteransprüche zeigen weitere vorteilhafte Ausgestaltungen der Erfindung. Erfindungsgemäß ist somit vorgesehen, dass bei einer Brennkraftmaschine, insbesondere einem Gasmotor, mit variablem Ventiltrieb mittels eines Massenstromsensors ein IST-Wert des momentanen Betriebszustands der Brennkraftmaschine ermittelt wird. Dieser IST-Wert wird in einem Luftaufwandkennfeld der Brennkraftmaschine mit dem zugehörigen Sollwert des Luftaufwandkennfelds verglichen. Anhand der sich ergebenden Differenz wird das Luftaufwandkennfeld korrigiert. According to the invention the object is achieved by the combination of features of claim 1, the dependent claims show further advantageous embodiments of the invention. According to the invention, it is thus provided that an actual value of the instantaneous operating state of the internal combustion engine is determined in an internal combustion engine, in particular a gas engine, with a variable valve train by means of a mass flow sensor. This actual value is compared in an air effort map of the internal combustion engine with the associated desired value of the air consumption map. Based on the resulting difference, the air effort map is corrected.
Bei dem erfindungsgemäßen Verfahren ergibt sich somit der Vorteil, dass die Gemischmengenermittlung direkt über ein Luftaufwandkennfeld erfolgen kann. Dies hat den großen Vorteil, dass die Gemischmenge schnell und genau ermittelt werden kann. Während bei den aus dem Stand der Technik bekannten Sensoren die Gemischmengenermittlung zu träge und in vielen Bereichen zu ungenau ist, um einen Ventildrift zu korrigieren, ist erfindungsgemäß ein Verfahren geschaffen worden, welches auf sehr einfache Weise die gewünschte Korrektur ermöglicht. In the method according to the invention thus results in the advantage that the mixture quantity determination can be done directly via an air effort map. This has the great advantage that the amount of mixture can be determined quickly and accurately. While in the sensors known from the prior art, the mixture quantity determination is too slow and in many areas too imprecise to correct a valve drift, a method has been provided according to the invention, which allows the desired correction in a very simple manner.
In bevorzugter Ausgestaltung der Erfindung ist vorgesehen, dass die Korrektur des Kennfeldes durch ein Verschieben des Kennfeldes, d.h., der jeweiligen Linien der Sollwerte des Kennfelds erfolgt. Diese Verschiebung kann rechnerisch sehr einfach vorgenommen werden. In einer alternativen Ausgestaltung der Erfindung erfolgt die Korrektur durch Addition eines Korrekturfaktors. Auch dies führt im Resultat zu einem Verschieben bzw. einer Anpassung des Kennfeldes an das vorliegende Betriebsverhalten der Brennkraftmaschine. In a preferred embodiment of the invention, it is provided that the correction of the characteristic map by shifting the characteristic field, that is, the respective lines of the set values of the map takes place. This shift can be made very simple mathematically. In an alternative embodiment of the invention, the correction is performed by adding a correction factor. As a result, this also leads to a displacement or adaptation of the characteristic map to the present operating behavior of the internal combustion engine.
Besonders günstig ist es, wenn erfindungsgemäß mittels des Massenstromsensors der Luft-Gas- Gemischmassenstrom in einem Ansaugpfad der Brennkraftmaschine gemessen wird. Hierbei ergibt sich der Vorteil, dass in dem Ansaugpfad ausreichend Bauraum für die Installation des Massenstromsensors vorhanden ist. Zudem wird die Messung nicht durch störende Betriebsparameter, beispielsweise Druckwellen, Schwingungen oder Ähnliches, beeinflusst. It is particularly advantageous if, according to the invention, the air-gas mixture mass flow is measured in an intake path of the internal combustion engine by means of the mass flow sensor. This results in the advantage that there is sufficient installation space for the installation of the mass flow sensor in the intake path. In addition, the measurement is not influenced by disturbing operating parameters, such as pressure waves, vibrations or the like.
Besonders günstig ist es, wenn die Messung mittels des Massenstromsensors in dem Ansaugpfad stromab zu einer Gaszufuhr in den Ansaugpfad erfolgt. Stromab der Gaszufuhr liegt ein stabiles Gemisch vor, welches durch den Massenstromsensor zuverlässig ermittelt werden kann. Die Messung durch den Massenstromsensor wird bei dem erfindungsgemäßen Verfahren bevorzugterweise vor einem in dem Ansaugpfad angeordneten Verdichter durchgeführt. Dies verhindert, dass Druckwellen des Verdichters die Messung beeinträchtigen. Das erfindungsgemäße Verfahren kann insbesondere bei stationären Gasmotoren angewendet werden, es ist jedoch generell für alle Arten von Gasmotoren nutzbar. It is particularly favorable if the measurement takes place by means of the mass flow sensor in the intake path downstream of a gas supply into the intake path. Downstream of the gas supply is a stable mixture, which can be reliably determined by the mass flow sensor. In the method according to the invention, the measurement by the mass flow sensor is preferably carried out before a compressor arranged in the intake path. This prevents pressure waves from the compressor from affecting the measurement. The method according to the invention can be used in particular for stationary gas engines, but it is generally usable for all types of gas engines.
In besonders vorteilhafter Weise wird das erfindungsgemäße Verfahren während eines stationären Betriebszustands der Brennkraftmaschine durchgeführt. Dieser stationäre Betriebszustand liegt insbesondere dann vor, wenn der Betrieb über einen Zeitraum größer als 30 Sekunden keine Laständerung erfährt. Es kann auch vorgesehen werden, dass erfindungsgemäß ein stationärer Zustand in einer ruhigen Motorphase von einigen Minuten abgewartet wird, bis die erfindungsgemäße Messung erfolgt. Durch die Korrektur des Kennfeldes kann erfindungsgemäß der Ladedruck und/oder die Drehzahl der Brennkraftmaschine verändert bzw. korrigiert werden, um die Ventildrift auszugleichen. In a particularly advantageous manner, the method according to the invention is carried out during a stationary operating state of the internal combustion engine. This stationary operating state is present in particular when the operation does not undergo any load change over a period of time greater than 30 seconds. It can also be provided that, according to the invention, a stationary state in a quiet motor phase of a few minutes is awaited until the measurement according to the invention takes place. By correcting the map, according to the invention, the boost pressure and / or the rotational speed of the internal combustion engine can be changed or corrected to compensate for the valve drift.
Obenstehend wurde die Erfindung anhand eines Massenstromsensors erläutert. Erfindungsgemäß können unterschiedliche Bauarten von derartigen Sensoren oder Sonden verwendet werden, beispielsweise auch Zylinderdrucksensoren, um den Luft/Gemischmassenstrom zu bestimmen. The invention has been explained above with reference to a mass flow sensor. According to the invention, different types of such sensors or probes can be used, for example, cylinder pressure sensors to determine the air / mixture mass flow.
Das erfindungsgemäße Verfahren stellt somit sicher, dass das Luftaufwandkennfeld der Brennkraftmaschine seine Genauigkeit beibehält und somit die Gemischmenge schnell und genau bestimmt werden kann. The inventive method thus ensures that the air effort map of the internal combustion engine maintains its accuracy and thus the amount of mixture can be determined quickly and accurately.
Ein weiterer Vorteil der Anwendung des erfindungsgemäßen Verfahrens besteht auch darin, dass Messfehler oder Sensorfehler von weiteren Sensoren, die zur Steuerung oder Regelung der Brennkraftmaschine verwendet werden, ermittelt werden können. A further advantage of the application of the method according to the invention is also that measuring errors or sensor errors can be determined by further sensors that are used to control or regulate the internal combustion engine.
Nachfolgend wird die Erfindung anhand eines Ausführungsbeispiels in Verbindung mit der Zeichnung beschrieben. Dabei zeigt: The invention will be described with reference to an embodiment in conjunction with the drawing. Showing:
Fig. 1 eine schematische Darstellung eines Luftaufwandkennfeldes, Fig. 2 eine schematische Darstellung der konstruktiven Anwendung des erfindungsgemäßen Verfahrens, und Fig. 3 ein Ablaufdiagramm des erfindungsgemäßen Verfahrensablaufs. 1 is a schematic representation of an air effort map, Fig. 2 is a schematic representation of the structural application of the method according to the invention, and Fig. 3 is a flow chart of the process sequence according to the invention.
Fig. 1 zeigt ein Luftaufwandkennfeld, bei welchem auf der Abszisse der Schließzeitpunkt eines Einlassventils dargestellt ist, während die Ordinate den Luftaufwand wiedergibt. Es sind in dem Diagramm mit durchgezogener Linie die Werte für einzelne Drehzahlen der Brennkraftmaschine dargestellt. Die gepunktete Linie zeigt ein korrigiertes Kennfeld, welches anhand des erfindungsgemäßen Verfahrens durch Verschieben des Kennfeldes oder durch Addition eines Korrekturfaktors korrigiert wurde. Wenn beispielsweise bei großen Einlassschließwinkeln die Rückstellkraft des Ventils nachlässt, beispielsweise durch Verschleiß der Ventilfeder, ergibt sich eine Erhöhung des Luftaufwandes. Diese Erhöhung kann bei einem Vergleich des jeweiligen IST- Werts mit dem SOLL- Wert bestimmt werden. Hierdurch ist ersichtlich, dass das SOLL- Kennfeld nicht eingehalten wird. Somit erfolgt die erfindungsgemäß vorgesehene Korrektur. Fig. 1 shows an air effort map, in which the abscissa of the closing time of an intake valve is shown, while the ordinate represents the cost of air. The values for individual rotational speeds of the internal combustion engine are shown in the diagram by a solid line. The dotted line shows a corrected map, which has been corrected by moving the map or by adding a correction factor using the method according to the invention. If, for example, at large inlet closing angles, the restoring force of the valve decreases, for example as a result of wear on the valve spring, the result is an increase in the amount of air required. This increase can be determined by comparing the respective actual value with the nominal value. This shows that the nominal map is not adhered to. Thus, the correction provided according to the invention takes place.
Fig. 2 zeigt in schematischer Darstellung einen Zylinder 5 einer Brennkraftmaschine mit einem Kolben 6. Durch einen Ansaugpfad 2 wird Luft 7 zugeführt. Dieser Luft 7 wird mittels einer Gaszufuhr 4 Gas zugemischt, so dass sich ein Gas/Luft-Gemisch 8 ergibt. Dieses Gas/Luft- Gemisch 8 wird einem Massenstromsensor 1 zugeführt, der die erfindungsgemäße Messung durchführt. Der Massenstromsensor 1 ist stromauf eines Verdichters 3 in dem Ansaugpfad 2 angeordnet. Stromab des Verdichters 3 liegt ein Ladedruck p5 vor. In Abhängigkeit von den Messwerten des Massenstromsensors 1 erfolgt zur Kompensation einer Ventildrift eine Regelung der Gaszufuhr 4 bzw. der Luftzufuhr 7. Fig. 2 shows a schematic representation of a cylinder 5 of an internal combustion engine with a piston 6. Through a suction path 2, air 7 is supplied. This air 7 is admixed gas by means of a gas supply 4, so that a gas / air mixture 8 results. This gas / air mixture 8 is fed to a mass flow sensor 1, which carries out the measurement according to the invention. The mass flow sensor 1 is arranged upstream of a compressor 3 in the intake path 2. Downstream of the compressor 3, a boost pressure p 5 is present. Depending on the measured values of the mass flow sensor 1, the gas supply 4 or the air supply 7 is regulated to compensate for a valve drift.
Fig. 3 zeigt ein vereinfachtes Ablaufdiagramm des erfindungsgemäßen Verfahrens. Dabei ist schematisch ein Kennfeld 9 dargestellt, welchem als Eingangsgrößen die Drehzahl der Brennkraftmaschine (RPM) und der Schließwinkel des Einlaufventils (ts (VCM)) zugeleitet werden. Aus dem Kennfeld ergibt sich ein Luftaufwand nc, welcher noch nicht korrigiert ist. Dieser Wert für den Luftaufwand wird einer elektronischen Schaltung 10 zugeführt, welche einen durch den zugeführten Wert Δλ3>ηο korrigierten Luftaufwand λ3 abgibt. Unter Zuhilfenahme dieses Wertes für den Luftaufwand wird ein Luftmassenstrom mcaic berechnet, der einer elektronischen Schaltung 11 zugeleitet wird, welcher auch ein Wert für den gemessenen Luftmassenstrom mprobe zugeführt wird. Der Wert für den gemessenen Luftmassenstrom mprobe wird von dem Massenstromsensor 1 abgegeben und wird als richtig angesehen. Über einen PI- Controller wird die Abweichung im Luftaufwand λ3 gemessen, welche zum einen der elektronischen Schaltung 10 und zum anderen zur Kennfeldkorrektur dem Kennfeld zugeleitet wird. 3 shows a simplified flow chart of the method according to the invention. In this case, a map 9 is shown schematically, which are fed as input variables, the speed of the internal combustion engine (RPM) and the closing angle of the inlet valve (t s (VCM)). From the map results in an air effort nc, which is not yet corrected. This value for the air consumption is supplied to an electronic circuit 10, which outputs a corrected by the supplied value Δλ 3> ηο air expenditure λ 3 . With the aid of this value for the air consumption, an air mass flow m ca i c is calculated, which is fed to an electronic circuit 11, which is also a value for the measured Air mass flow m per be supplied. The value for the measured air mass flow m per b e is output from the mass flow sensor 1 and is considered correct. The deviation in the air expenditure λ 3 is measured via a PI controller, which is fed to the electronic circuit 10 on the one hand and to the characteristic field correction on the other hand.

Claims

ANSPRÜCHE
1. Verfahren zur Kompensation eines Ventildrifts einer Brennkraftmaschine mit variablem Ventiltrieb, bei welchem mittels eines Massenstromsensors (1) ein IST- Wert des momentanen Betriebszustands der Brennkraftmaschine in einem Luftaufwandkennfeld ermittelt und mit einem SOLL-Wert des Luftaufwandkennfelds verglichen wird und nachfolgend das Luftaufwandkennfeld korrigiert wird. 1. A method for compensating a valve drift of an internal combustion engine with variable valve train, wherein by means of a mass flow sensor (1) an actual value of the current operating state of the internal combustion engine is determined in an air effort map and compared with a target value of the air effort map and subsequently the air effort map is corrected ,
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Korrektur des Luftaufwandkennfelds durch Verschieben des Luftaufwandkennfeldes erfolgt. 2. The method according to claim 1, characterized in that the correction of the air effort map is done by moving the air effort map.
3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Korrektur des Luftaufwandkennfelds durch Addition eines Korrekturfaktors erfolgt. 3. The method according to claim 1, characterized in that the correction of the air effort map is effected by adding a correction factor.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass mittels des Massenstromsensors (1) der Luft/Gasgemisch-Massenstrom in einem Ansaugpfad (2) gemessen wird. 4. The method according to any one of claims 1 to 3, characterized in that by means of the mass flow sensor (1) of the air / gas mixture mass flow in an intake path (2) is measured.
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Messung mittels des Massenstromsensors in einem Ansaugpfad (2) benachbart zu einer5. The method according to any one of claims 1 to 4, characterized in that the measurement by means of the mass flow sensor in a suction path (2) adjacent to a
Gaszufuhr (4) in den Ansaugpfad (2) erfolgt. Gas supply (4) in the intake path (2) takes place.
6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Messung durch den Massenstromsensor (1) vor einem in einem Ansaugpfad (2) angeordneten Verdichter (3) erfolgt. 6. The method according to any one of claims 1 to 5, characterized in that the measurement by the mass flow sensor (1) in front of a in an intake path (2) arranged compressor (3).
7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das Verfahren bei einem stationären Gasmotor angewendet wird. 7. The method according to any one of claims 1 to 6, characterized in that the method is applied to a stationary gas engine.
8. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das Verfahren während eines stationären Betriebszustands der Brennkraftmaschine durchgeführt wird. 8. The method according to any one of claims 1 to 7, characterized in that the method is carried out during a steady state operation of the internal combustion engine.
9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass das Verfahren während eines stationären Betriebs, der über einen Zeitraum größer als 30 Sekunden andauert, durchgeführt wird. 9. The method according to claim 8, characterized in that the method during a steady-state operation, which lasts for a period greater than 30 seconds, is performed.
10. Verfahren nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass bei der Korrektur des Luftaufwandkennfelds der Ladedruck und/oder die Drehzahl der Brennkraftmaschine verändert werden. 10. The method according to any one of claims 1 to 9, characterized in that are changed in the correction of the air effort map of the boost pressure and / or the speed of the internal combustion engine.
EP16735996.7A 2015-07-27 2016-07-07 Method for compensating valve drift in an internal combustion engine Withdrawn EP3329109A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015214179.9A DE102015214179B3 (en) 2015-07-27 2015-07-27 Method for compensating a valve drift of an internal combustion engine
PCT/EP2016/001166 WO2017016637A1 (en) 2015-07-27 2016-07-07 Method for compensating valve drift in an internal combustion engine

Publications (1)

Publication Number Publication Date
EP3329109A1 true EP3329109A1 (en) 2018-06-06

Family

ID=56368924

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16735996.7A Withdrawn EP3329109A1 (en) 2015-07-27 2016-07-07 Method for compensating valve drift in an internal combustion engine

Country Status (6)

Country Link
US (1) US10690076B2 (en)
EP (1) EP3329109A1 (en)
CN (1) CN107849986A (en)
DE (1) DE102015214179B3 (en)
HK (1) HK1252904A1 (en)
WO (1) WO2017016637A1 (en)

Family Cites Families (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5597951A (en) * 1995-02-27 1997-01-28 Honda Giken Kogyo Kabushiki Kaisha Intake air amount-estimating apparatus for internal combustion engines
JP2001123877A (en) * 1999-10-22 2001-05-08 Toyota Motor Corp Intake air amount detecting device for internal combustion engine
JP2002130042A (en) 2000-10-19 2002-05-09 Denso Corp Cylinder filling air volume detector for internal combustion engine
DE10332698B4 (en) * 2002-09-25 2012-03-29 Robert Bosch Gmbh Method for regulating exhaust gas recirculation in an internal combustion engine
JP4154991B2 (en) * 2002-10-23 2008-09-24 トヨタ自動車株式会社 Intake air amount estimation device for internal combustion engine
JP4029739B2 (en) * 2003-02-05 2008-01-09 トヨタ自動車株式会社 Calculation of charge air quantity in internal combustion engine
JP2004239128A (en) * 2003-02-05 2004-08-26 Mazda Motor Corp Predicting analyzing method of engine performance, predicting analyzing system and its control program
JP4372455B2 (en) * 2003-05-27 2009-11-25 トヨタ自動車株式会社 Control device for internal combustion engine
JP4120524B2 (en) * 2003-08-04 2008-07-16 日産自動車株式会社 Engine control device
JP4598474B2 (en) * 2004-10-07 2010-12-15 本田技研工業株式会社 Plant control equipment
DE102005010785A1 (en) * 2005-03-01 2006-09-07 Daimlerchrysler Ag Method for correcting an air mass measurement error in an internal combustion engine of a motor vehicle
FR2885175B1 (en) * 2005-04-28 2010-08-13 Renault Sas METHOD FOR CONTROLLING A VEHICLE ENGINE USING A NEURON NETWORK
GB2434406A (en) * 2005-08-25 2007-07-25 Ford Global Tech Llc I.c. engine exhaust gas recirculation (EGR) system with dual high pressure and low pressure EGR loops
CA2538984C (en) * 2006-03-10 2007-11-06 Westport Research Inc. Method of accurately metering a gaseous fuel that is injected directly into a combustion chamber of an internal combustion engine
US7296562B2 (en) * 2006-03-30 2007-11-20 Caterpiller Inc. Control system and method for estimating turbocharger performance
DE102006035096B4 (en) * 2006-07-28 2014-07-03 Continental Automotive Gmbh Method and device for operating an internal combustion engine
RO122556B1 (en) * 2006-07-28 2009-08-28 J. Klein Dennis Process for using poor mixtures
US7536249B2 (en) * 2007-07-12 2009-05-19 Delphi Technologies, Inc. System and method for a pumping torque estimation model for all air induction configurations
JP4697201B2 (en) * 2007-07-19 2011-06-08 トヨタ自動車株式会社 Abnormality detection device for internal combustion engine
US7565236B2 (en) * 2007-07-20 2009-07-21 Gm Global Technology Operations, Inc. Airflow estimation method and apparatus for internal combustion engine
US7546200B2 (en) * 2007-10-31 2009-06-09 Roy Dwayne Justice Systems and methods for determining and displaying volumetric efficiency
WO2010095477A1 (en) * 2009-02-17 2010-08-26 本田技研工業株式会社 Device for calculating intake air volume in cylinder of internal combustion engine
JP4862083B2 (en) * 2010-01-12 2012-01-25 本田技研工業株式会社 Cylinder intake air amount calculation device for internal combustion engine
US8251049B2 (en) * 2010-01-26 2012-08-28 GM Global Technology Operations LLC Adaptive intake oxygen estimation in a diesel engine
EP2660445A4 (en) * 2010-12-27 2017-08-09 Nissan Motor Co., Ltd Internal combustion engine control device
DE102011083587B4 (en) * 2011-09-28 2023-08-10 Robert Bosch Gmbh Method and device for monitoring at least one part of an internal combustion engine
US20130226435A1 (en) 2012-02-29 2013-08-29 GM Global Technology Operations LLC Systems and methods for adjusting an estimated flow rate of exhaust gas passing through an exhaust gas recirculation valve
DE102012004554A1 (en) * 2012-03-09 2013-09-12 Audi Ag Method for determining gas volumetric efficiency of internal combustion engine e.g. directly loaded diesel engine for motor car, involves adjusting base volumetric efficiency according to determined offset-value
US9097191B2 (en) * 2012-06-22 2015-08-04 GM Global Technology Operations LLC Charge flow temperature estimation
KR101807008B1 (en) * 2012-07-20 2017-12-08 현대자동차 주식회사 Control method for cvvl engine
DE102012014713A1 (en) * 2012-07-25 2014-01-30 Volkswagen Aktiengesellschaft Method for operating an internal combustion engine
US9222427B2 (en) * 2012-09-10 2015-12-29 GM Global Technology Operations LLC Intake port pressure prediction for cylinder activation and deactivation control systems
JP5379918B1 (en) * 2013-01-11 2013-12-25 三菱電機株式会社 Control device for internal combustion engine
ITBO20130480A1 (en) * 2013-09-10 2015-03-11 Magneti Marelli Spa METHOD OF CORRECTION OF THE REDUCED MASS CAPACITY OF A COMPRESSOR IN AN INTERNAL TURBOCHROME COMBUSTION ENGINE BY A TURBOCHARGER
US9541018B2 (en) * 2014-09-15 2017-01-10 Fca Us Llc Engine cylinder bank-to-bank torque imbalance correction
DE202015001094U1 (en) * 2015-02-11 2016-05-16 Gm Global Technology Operations, Llc Turbocharged internal combustion engine with a NOx trap for lean operation
US10024251B2 (en) * 2015-06-18 2018-07-17 Ford Global Technologies, Llc Method for crankcase ventilation in a boosted engine
GB2532593A (en) * 2015-10-12 2016-05-25 Gm Global Tech Operations Llc A method of controlling the operation of an air charging system of an internal combustion engine
WO2017097330A1 (en) * 2015-12-07 2017-06-15 Volvo Truck Corporation Control system and control method for an internal combustion engine
US10871104B2 (en) * 2017-08-02 2020-12-22 Ford Global Technologies, Llc Systems and methods for a split exhaust engine system

Also Published As

Publication number Publication date
US20180195452A1 (en) 2018-07-12
WO2017016637A1 (en) 2017-02-02
CN107849986A (en) 2018-03-27
HK1252904A1 (en) 2019-06-06
DE102015214179B3 (en) 2016-08-18
US10690076B2 (en) 2020-06-23

Similar Documents

Publication Publication Date Title
DE102015209665B4 (en) Method for identifying valve timing of an internal combustion engine
DE102014217560B3 (en) Method and device for improving the combustion processes taking place in the cylinders of an internal combustion engine
DE102013113157A1 (en) Method and device for regulating a charge in a cylinder of an internal combustion engine
DE102005057975A1 (en) Method for controlling fuel or air flow to individual cylinder of internal-combustion engine, involves evaluation of signal which is influenced by combustion or affects value which has influence on combustion
DE102015111713B4 (en) Control operation deviation compensation method of a turbocharger
WO2009132897A1 (en) Method for determining the rail pressure in a common rail system, and common rail injection system
EP2977596A1 (en) Combustion engine with a control device
DE102005056519A1 (en) Method and device for operating an internal combustion engine
DE10316672A1 (en) Adaptive control of the cylinder valve timing control in an internal combustion engine
DE102010041999A1 (en) Method for correcting actual position of sensor parameter e.g. charge pressure sensor, for detecting pressure of gaseous or liquid medium in air system of motor car, involves correcting parameter by pressurizing with compensation parameter
DE102012003581B3 (en) Compressor governor for a combustion engine for inserting into a motor vehicle, has an interface for combustion engine, through which a control action on the combustion engine is carried out
EP0976922B1 (en) Method for torque adjustment
DE102015214179B3 (en) Method for compensating a valve drift of an internal combustion engine
DE102015207710A1 (en) Method for increasing the accuracy of a sensorless pressure detection
DE102011077698A1 (en) Method for controlling smooth running of e.g. diesel engine used in motor vehicle, involves assigning working cycles for each cylinder so as to control smooth running of internal combustion engine via two working cycles of cylinder
DE102014225176A1 (en) A method and apparatus for providing a filtered air system state quantity in a controller of an internal combustion engine
DE10244540A1 (en) Regulating position of hydraulic camshaft adjuster for internal combustion engine involves determining control parameters for PID regulator depending on hydraulic liquid state parameter(s)
DE102014217563B3 (en) Method and device for improving the combustion processes taking place in the cylinders of an internal combustion engine by means of a camshaft adjustment
EP1029168B1 (en) Process for operating an internal combustion engine, in particular of a motor vehicle
AT506228B1 (en) METHOD FOR OPERATING A HEATER
DE102005011836B4 (en) Method and device for controlling an internal combustion engine
AT517033B1 (en) METHOD FOR REGULATING THE OPERATION POINT OF A GAS TURBINE
AT502440B1 (en) METHOD FOR REGULATING THE CHARACTERISTICS OF COMBUSTION IN AN INTERNAL COMBUSTION ENGINE
DE19638974C1 (en) Boost pressure regulator for an internal combustion engine
DE102015216258A1 (en) Method and apparatus for performing a diagnosis of a VCR actuator in an internal combustion engine

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20180227

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20201009

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20210220