DE102012212860B3 - Method for determining the filling of the cylinders of reciprocating internal combustion engines - Google Patents
Method for determining the filling of the cylinders of reciprocating internal combustion engines Download PDFInfo
- Publication number
- DE102012212860B3 DE102012212860B3 DE102012212860A DE102012212860A DE102012212860B3 DE 102012212860 B3 DE102012212860 B3 DE 102012212860B3 DE 102012212860 A DE102012212860 A DE 102012212860A DE 102012212860 A DE102012212860 A DE 102012212860A DE 102012212860 B3 DE102012212860 B3 DE 102012212860B3
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- pressure
- opening
- gas exchange
- internal combustion
- intake
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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
- F02D41/18—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
- 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
- F02D2200/0406—Intake manifold pressure
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Verfahren zur Ermittlung des Druckes im Einlasskanalsystem einer Hubkolbenbrennkraftmaschine und zur Analyse der Druckschwankungen, wobei den Zylindern mittels des Einlasskanalsystems Luft oder Gasgemisch zuführbar ist und wobei im oder am Einlasskanalsystem ein Drucksensor so angebaut und ausgerichtet ist, dass er die Druckschwankungen im Einlasskanalsystem aufgrund der Füllung oder Nicht-Füllung jedes einzelnen Zylinders ermittelt. Zur Analyse wird der Druck im Einlass- und/oder Auslasskanalsystem und der/die elektrischen Impuls(e) zumindest eines Schaltventils oder der/die den Nocken zugeordneten Zeitpunktimpulsen an der Nocken- oder Kurbelwelle über der Zeitachse ermittelt und einander zugeordnet und der Druckverlauf im Einlass- und/oder Auslasskanal als Indiz für das planmäßige Öffnen oder Nicht-Öffnen der Gaswechselventile herangezogen.A method for determining the pressure in the intake port system of a reciprocating internal combustion engine and for analyzing the pressure fluctuations, wherein the cylinders by means of the intake duct system air or gas mixture can be fed and wherein in or on the intake duct system, a pressure sensor is mounted and aligned so that it can reduce the pressure fluctuations in the intake duct system due to the filling or Non-filling of each cylinder is determined. For analysis, the pressure in the intake and / or exhaust duct system and the electrical pulse (s) of at least one switching valve or the timing pulses associated with the cam on the cam or crankshaft over the time axis are determined and associated with each other and the pressure profile in the inlet - And / or exhaust duct used as an indication of the scheduled opening or non-opening of the gas exchange valves.
Description
Die Erfindung betrifft ein Verfahren zur Analyse der Druckschwankungen im Einlass- und/oder Auslasskanalsystem und damit der Füllung der Zylinder einer Hubkolbenbrennkraftmaschine mittels eines Drucksensors, wobei den Zylindern der Hubkolbenbrennkraftmaschine mittels des Einlasskanalsystems Luft oder Gasgemisch zuführbar ist.The invention relates to a method for analyzing the pressure fluctuations in the intake and / or exhaust duct system and thus the filling of the cylinder of a reciprocating internal combustion engine by means of a pressure sensor, wherein the cylinders of the reciprocating internal combustion engine by means of the intake duct system air or gas mixture can be fed.
Hintergrund der ErfindungBackground of the invention
Es ist bekannt,
Eine Überprüfung der Füllung der Zylinder bzw. eine Überprüfung des ordnungsgemäßen Öffnens und/oder Schließens von Gaswechselventilen während des Starts und/oder während des Hochlaufens der Hubkolbenbrennkraftmaschine ist dabei nicht vorzunehmen.A check of the filling of the cylinder or a check of the proper opening and / or closing of gas exchange valves during the start and / or during startup of the reciprocating internal combustion engine is not carried out.
Aufgabe der ErfindungObject of the invention
Aufgabe der Erfindung ist es daher, ein Verfahren zur Verfügung zu stellen, mit dem mit einfachen Mitteln der Druck im Einlass- und/oder Auslasskanalsystem ermittelt wird, um ein ordnungsgemäßes Öffnen und Schließen der Gaswechselventile festzustellen. Dies soll insbesondere bei einer Hubkolbenbrennkraftmaschine erfolgen, die mit einer vollvariablen hydraulischen, elektromagnetischen oder pneumatischen Ventilsteuervorrichtung der Gaswechselventile ausgerüstet sind.The object of the invention is therefore to provide a method with which the pressure in the intake and / or exhaust duct system is determined by simple means to determine a proper opening and closing of the gas exchange valves. This should be done in particular in a reciprocating internal combustion engine, which are equipped with a fully variable hydraulic, electromagnetic or pneumatic valve control device of the gas exchange valves.
Zusammenfassung der ErfindungSummary of the invention
Die Aufgabe der Erfindung wird durch die Merkmale des Verfahrensanspruchs 1 gelöst. Dadurch kann festgestellt werden, ob die Gaswechselventile ordnungsgemäß öffnen und schließen.The object of the invention is achieved by the features of
Dies kann sowohl mit einem einzigen Drucksensor am Einlass- und/oder Auslasskanalsystem oder mit mehreren den Zylindern zugeordneten Drucksensoren erfolgen, wobei z. B. bei einem Vier-Zylinder-Motor zwei oder auch vier Drucksensoren zur Anwendung kommen können.This can be done both with a single pressure sensor on the inlet and / or outlet duct system or with a plurality of pressure sensors associated with the cylinders, wherein z. B. in a four-cylinder engine two or four pressure sensors can be used.
Diese Ausgestaltung hat besondere Bedeutung bei Hubkolbenbrennkraftmaschinen mit einer vollvariablen hydraulischen Ventilsteuervorrichtung der Gaswechselventile, insbesondere der Einlassventile, mit einer hydraulischen Gebereinheit zur Druckerzeugung, die von Nocken einer mit einer Kurbelwelle der Brennkraftmaschine drehverbundenen Nockenwelle beherrscht und mit einem Druckanschluss an das hydraulische Druckmedium des Ölkreislaufes der Brennkraftmaschine angeschlossen ist, mit zumindest einer hydraulischen Nehmereinheit, die mit zumindest einem Gaswechselventil in Verbindung steht, mit zumindest einem elektromagnetischen von der Steuereinheit beherrschten hydraulischen Schaltventil und mit zumindest einem Druckraum, der mit der Gebereinheit, der Nehmereinheit und dem/den Schaltventil(en) in Wirkverbindung steht.This embodiment is of particular importance in reciprocating internal combustion engines with a fully variable hydraulic valve control device of the gas exchange valves, in particular the inlet valves, with a hydraulic pressure generating unit, which dominated by cams of a crankshaft of the engine rotatably connected camshaft and with a pressure connection to the hydraulic pressure medium of the oil circuit of the internal combustion engine is connected, with at least one hydraulic slave unit, which communicates with at least one gas exchange valve, with at least one electromagnetic dominated by the control unit hydraulic switching valve and at least one pressure chamber connected to the transmitter unit, the receiving unit and the / the switching valve (s) in Active compound is.
Bei einer derartigen vollvariablen Ventilsteuervorrichtung kann es vorkommen, dass während längerer Standzeiten der Druckraum der Ventilsteuervorrichtung nicht genügend mit Druckmedium gefüllt und ggf. sogar Luft eingedrungen ist und dass das hydraulische Druckmedium des Ölkreislaufes der Brennkraftmaschine als Lieferant für die Ventilsteuervorrichtung in seinem Druck so weit absinkt, dass an dem Druckanschluss kein Druckmedium zum Nachfüllen zur Verfügung steht.In such a fully variable valve control device, it may happen that during longer periods of time the pressure chamber of the valve control device is not sufficiently filled with pressure medium and possibly even air has penetrated and that the hydraulic pressure medium of the oil circuit of the internal combustion engine drops as far as its pressure for the valve control device, that no pressure medium is available for refilling at the pressure connection.
Daher bedarf es einer gewissen Anzahl von Umdrehungen der Brennkraftmaschine, bis sich hinreichender Druck einstellt und die hydraulische Ventilsteuervorrichtung ordnungsgemäß arbeitet.Therefore, it takes a certain number of revolutions of the internal combustion engine until sufficient pressure is established and the hydraulic valve control device is operating properly.
Es sei ausdrücklich darauf hingewiesen, dass die Ventilsteuervorrichtung auch elektromagnetisch oder pneumatisch ausgeführt sein kann.It should be expressly understood that the valve control device can also be designed electromagnetically or pneumatically.
In weiterer Ausgestaltung der Erfindung wird zur Analyse der Druckschwankungen vorgeschlagen, den Druckverlauf im Einlass- und/oder Auslasskanalsystem und den/die tatsächlichen und/oder geplanten elektrischen Impuls(e) zumindest eines Schaltventils über der Zeitachse zu ermitteln und einander zuzuordnen und den Druckverlauf im Einlasskanalsystem als Maß für das planmäßige Öffnen oder Nicht-Öffnen der Gaswechsel-Einlassventile während des Betriebs, des Starts oder Hochlaufens der Hubkolbenbrennkraftmaschine heranzuziehen.In a further embodiment of the invention, the pressure variation in the intake and / or exhaust duct system and the actual and / or planned electrical impulse (s) of at least one switching valve over the time axis are determined and assigned to one another and the pressure profile in the analysis Inlet duct system as a measure of the scheduled opening or non-opening of the gas exchange intake valves during operation, start or run up the reciprocating internal combustion engine use.
Alternativ zu dem/den elektrischen Impuls(en) zumindest eines Schaltventils können der/die den Nocken zugeordneten Zeitpunktimpuls(e) an der Nocken- oder Kurbelwelle über der Zeit ermittelt und einander zugeordnet werden.As an alternative to the electrical pulse (s) of at least one switching valve, the timing pulse (e) associated with the cam on the cam or crankshaft may be determined over time and associated with each other.
Es kann dazu z. B. ein ohnehin vorhandener Impulsgeber für die obere Totpunktlage (O. T.) der Kolben benutzt werden. Dies ist leicht möglich, weil die jeweiligen Nocken an der Nockenwelle letztlich für die Betätigung der Gaswechselventile zuständig sind.It can be z. B. an already existing pulse generator for the top dead center (TDC) of Pistons are used. This is easily possible because the respective cams on the camshaft are ultimately responsible for the operation of the gas exchange valves.
Aus diesen Kenngrößen kann zeitabhängig festgestellt werden, ob und welches der Gaswechselventile ordnungsgemäß oder nicht ordnungsgemäß arbeitet.From these parameters can be determined time-dependent, if and which of the gas exchange valves is working properly or not properly.
In weiterer Ausgestaltung des Verfahrens wird vorgeschlagen, dass ein Vektor des Druckverlaufs ausgehend von dem Druck im Einlasskanalsystem bei einem tatsächlichen und/oder geplanten Öffnen eines Gaswechselventils, insbesondere eines Einlassventils ermittelt und dem Druckverlauf folgend ausgerichtet wird und dass die Richtung des Vektors als Kennung für das Öffnen oder Nicht-Öffnen des jeweiligen Gaswechselventils dient. Es erfolgt somit eine Analyse des Druckverlaufs während eines definierten Winkelbereichs.In a further embodiment of the method, it is proposed that a vector of the pressure profile be determined starting from the pressure in the intake duct system in an actual and / or planned opening of a gas exchange valve, in particular an inlet valve and aligned following the pressure profile and that the direction of the vector as an identifier for the Opening or non-opening of the respective gas exchange valve is used. There is thus an analysis of the pressure curve during a defined angular range.
Erfolgt nämlich nach dem geplanten Öffnen eines Ventils ein Druckabfall bis zu einem kalibrierbaren Grenzbereich und damit eine Vektorrichtung in Richtung Druckabfall, so hat das betreffende Ventil geöffnet. Erfolgt allerdings kein Druckabfall sondern ein Druckanstieg mit entsprechender Ausrichtung des Vektors, so wurde das Ventil nicht planmäßig geöffnet. Dies kann bei der angesprochenen vollvariablen Ventilsteuervorrichtung daran liegen, dass der Impuls nicht ausreichte, um das Ventil zu öffnen, weil z. B. beim Kaltstart die Viskosität des hydraulischen Druckmediums zu hoch war oder weil kein Druckaufbau an der hydraulischen Nehmereinheit erfolgte.If, after the planned opening of a valve, a pressure drop occurs up to a calibratable limit range and thus a vector direction in the direction of the pressure drop, the valve in question has opened. However, if no pressure drop but a pressure increase with appropriate orientation of the vector, so the valve was not opened according to plan. This may be due to the fact that the pulse was not sufficient to open the valve in the mentioned fully variable valve control device, because z. B. the cold start the viscosity of the hydraulic pressure medium was too high or because no pressure build-up took place on the hydraulic slave unit.
In weiterer Ausgestaltung der Erfindung wird daher vorgeschlagen, dass bei Nicht-Öffnen eines Gaswechselventils, insbesondere Einlassventil, z. B. beim Kaltstart der Hubkolbenbrennkraftmaschine die Stromstärke des zugeordneten Schaltventils erhöht wird.In a further embodiment of the invention is therefore proposed that when not opening a gas exchange valve, in particular inlet valve, z. B. the cold start of the reciprocating internal combustion engine, the current intensity of the associated switching valve is increased.
Weiterhin wird beim Nicht-Öffnen eines Gaswechselventils, insbesondere Einlassventils vorgeschlagen, die Kraftstoffzufuhr zu diesem Zylinder so lange zu unterbrechen, bis das Gaswechselventil wieder öffnet. Dadurch wird verhindert, dass im Zylinder oder vor dem Gaswechselventil, insbesondere Einlassventil, sich eine zu hohe Menge Kraftstoff sammelt und dass Motorprobleme entstehen können, wenn durch Öffnen des Gaswechselventils wieder Luft oder Gasgemisch zugeführt wird. Dies ist insbesondere dann erforderlich, wenn ein unerwünschter Druckabfall in der hydraulischen Ventilsteuervorrichtung vorliegt.Furthermore, when not opening a gas exchange valve, in particular intake valve proposed to interrupt the fuel supply to this cylinder until the gas exchange valve opens again. This prevents that in the cylinder or before the gas exchange valve, in particular intake valve, an excessive amount of fuel collects and that engine problems may arise when air or gas mixture is supplied by opening the gas exchange valve. This is particularly necessary when there is an undesirable pressure drop in the hydraulic valve control device.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Zur weiteren Erläuterung der Erfindung wird auf die Zeichnungen verwiesen, in denen ein Ausführungsbeispiel der Erfindung vereinfacht dargestellt ist. Es zeigen:For further explanation of the invention reference is made to the drawings, in which an embodiment of the invention is shown in simplified form. Show it:
Detaillierte Beschreibung der ZeichnungenDetailed description of the drawings
In den
Zu dem Druckverlaufzeitpunkt im Druckverlauf
Aus
Wie an den Druckpunkten
In dem Diagramm gemäß
In
Die durch den Druckverlauf festgestellten Fehler beim Betätigen der Einlassventile können bei einer vollvariablen hydraulischen, elektromagnetischen oder pneumatischen Ventilsteuervorrichtung durch erhöhten Stromimpuls an dem oder den Schaltventil(en) behoben werden.The detected by the pressure curve error in operating the intake valves can be corrected in a fully variable hydraulic, electromagnetic or pneumatic valve control device by increased current pulse on the one or more switching valve (s).
Weiterhin kann durch Unterbrechung der Kraftstoffzufuhr zu dem entsprechenden Zylinder, das Entstehen von Motorschäden vermieden werden, weil der Motor ausreichende Zeit erhält, um hochzulaufen und den entstandenen Druckabfall vor oder in der Ventilsteuervorrichtung zu kompensieren.Furthermore, by interrupting the supply of fuel to the corresponding cylinder, the occurrence of engine damage can be avoided because the engine is given sufficient time to run up and compensate for the resulting pressure drop before or in the valve control device.
Zusätzlich kann die fehlerhafte Gasventilbetätigung zu Zwecken der Motordiagnostik genutzt werden.In addition, the faulty gas valve actuation can be used for the purpose of engine diagnostics.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 1 bis 41 to 4
- Stromverläufecurrent courses
- 55
- Druckverlaufpressure curve
- 6 bis 106 to 10
- Druckpunktepressure points
- 10 bis 1510 to 15
- Druckpunktepressure points
- 1616
- Lokales DruckmaximumLocal pressure maximum
- 1717
- Lokales DruckmimimumLocal pressure minimum
- 1818
- Positives ErkennungsfeldPositive detection field
- 19, 19a19, 19a
- Vektorenvectors
- 2020
- Negatives ErkennungsfeldNegative detection field
Claims (5)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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DE102012212860A DE102012212860B3 (en) | 2012-07-23 | 2012-07-23 | Method for determining the filling of the cylinders of reciprocating internal combustion engines |
PCT/EP2013/063840 WO2014026796A1 (en) | 2012-07-23 | 2013-07-01 | Device and method for determining the charging of a cylinder of an internal combustion engine |
Applications Claiming Priority (1)
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DE102012212860A DE102012212860B3 (en) | 2012-07-23 | 2012-07-23 | Method for determining the filling of the cylinders of reciprocating internal combustion engines |
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DE102012212860B3 true DE102012212860B3 (en) | 2013-12-12 |
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DE102012212860A Expired - Fee Related DE102012212860B3 (en) | 2012-07-23 | 2012-07-23 | Method for determining the filling of the cylinders of reciprocating internal combustion engines |
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WO (1) | WO2014026796A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014203688A1 (en) * | 2014-02-28 | 2015-09-03 | Schaeffler Technologies AG & Co. KG | Method for detecting outgassing effects in a hydraulic fluid |
DE102015200266A1 (en) | 2015-01-12 | 2016-07-14 | Schaeffler Technologies AG & Co. KG | Method for detecting the opening or closing state of valves in a flow system |
DE102015200472A1 (en) | 2015-01-14 | 2016-07-14 | Schaeffler Technologies AG & Co. KG | Method for detecting and controlling the opening and closing times of valves in a flow system |
DE102015204132B3 (en) * | 2015-03-09 | 2016-08-11 | Schaeffler Technologies AG & Co. KG | Control for targeted dead time change |
WO2018068922A1 (en) * | 2016-10-10 | 2018-04-19 | Continental Automotive Gmbh | Method for the combined identification of an inlet valve stroke phase difference and an outlet valve stroke phase difference of an internal combustion engine with the aid of lines of the same amplitude |
WO2018068923A1 (en) * | 2016-10-10 | 2018-04-19 | Continental Automotive Gmbh | Method for the combined identification of the phase differences of the inlet valve stroke and the outlet valve stroke of an internal combustion engine with the aid of lines of equal phase position and amplitude |
DE102016222533A1 (en) | 2016-11-16 | 2018-05-17 | Continental Automotive Gmbh | Method for monitoring deviations occurring in the valve train of an internal combustion engine and electronic engine control unit for carrying out the method |
US11280227B2 (en) | 2019-08-15 | 2022-03-22 | Volkswagen Aktiengesellschaft | Method for adaptation of a detected camshaft position, control unit for carrying out the method, internal combustion engine, and vehicle |
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DE102016216652A1 (en) | 2016-09-02 | 2018-03-08 | Volkswagen Aktiengesellschaft | Method, control device and system for detecting a deviation of an actual actuation time of a gas exchange valve of an internal combustion engine from a predetermined actuation time |
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Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102014203688A1 (en) * | 2014-02-28 | 2015-09-03 | Schaeffler Technologies AG & Co. KG | Method for detecting outgassing effects in a hydraulic fluid |
DE102015200266A1 (en) | 2015-01-12 | 2016-07-14 | Schaeffler Technologies AG & Co. KG | Method for detecting the opening or closing state of valves in a flow system |
DE102015200472A1 (en) | 2015-01-14 | 2016-07-14 | Schaeffler Technologies AG & Co. KG | Method for detecting and controlling the opening and closing times of valves in a flow system |
DE102015204132B3 (en) * | 2015-03-09 | 2016-08-11 | Schaeffler Technologies AG & Co. KG | Control for targeted dead time change |
KR20190058647A (en) * | 2016-10-10 | 2019-05-29 | 씨피티 그룹 게엠베하 | A method of identifying an inlet valve stroke phase difference and an outlet valve stroke phase difference of an internal combustion engine together using a line of the same amplitude |
US10711717B2 (en) | 2016-10-10 | 2020-07-14 | Vitesco Technologies GmbH | Method for the combined identification of phase differences of the inlet valve stroke and of the outlet valve stroke |
CN109964018B (en) * | 2016-10-10 | 2022-02-22 | 世倍特集团有限责任公司 | Method for combined detection of intake valve lift phase differences and exhaust valve lift phase differences of an internal combustion engine by means of lines of equal amplitude |
KR102169757B1 (en) | 2016-10-10 | 2020-10-27 | 씨피티 그룹 게엠베하 | Method for the combined identification of the inlet valve stroke phase difference and the outlet valve stroke phase difference in internal combustion engines using lines of the same phase position and amplitude |
WO2018068922A1 (en) * | 2016-10-10 | 2018-04-19 | Continental Automotive Gmbh | Method for the combined identification of an inlet valve stroke phase difference and an outlet valve stroke phase difference of an internal combustion engine with the aid of lines of the same amplitude |
KR20190058646A (en) * | 2016-10-10 | 2019-05-29 | 씨피티 그룹 게엠베하 | A method for combined identification of an inlet valve stroke phase difference and an outlet valve stroke phase difference of an internal combustion engine using lines of the same phase position and amplitude |
CN109964018A (en) * | 2016-10-10 | 2019-07-02 | 世倍特集团有限责任公司 | Identified the method for the air inlet lift of a valve phase difference and exhaust valve lift phase difference of internal combustion engine in combination by means of the line of same-amplitude |
WO2018068923A1 (en) * | 2016-10-10 | 2018-04-19 | Continental Automotive Gmbh | Method for the combined identification of the phase differences of the inlet valve stroke and the outlet valve stroke of an internal combustion engine with the aid of lines of equal phase position and amplitude |
US10718283B2 (en) | 2016-10-10 | 2020-07-21 | Vitesco Technologies GmbH | Combined identification of an inlet valve stroke phase difference and an outlet valve stroke phase difference of an internal combustion engine with the aid of lines of the same amplitude |
KR102169751B1 (en) | 2016-10-10 | 2020-10-27 | 씨피티 그룹 게엠베하 | How to identify both the inlet valve stroke phase difference and the outlet valve stroke phase difference in an internal combustion engine using lines of the same amplitude |
DE102016222533B4 (en) | 2016-11-16 | 2018-07-26 | Continental Automotive Gmbh | Method for monitoring deviations occurring in the valve train of an internal combustion engine and electronic engine control unit for carrying out the method |
US11143126B2 (en) | 2016-11-16 | 2021-10-12 | Vitesco Technologies GmbH | Monitoring deviations occurring in the valve drive of an internal combustion engine, and electronic engine control units for executing such methods |
DE102016222533A1 (en) | 2016-11-16 | 2018-05-17 | Continental Automotive Gmbh | Method for monitoring deviations occurring in the valve train of an internal combustion engine and electronic engine control unit for carrying out the method |
US11280227B2 (en) | 2019-08-15 | 2022-03-22 | Volkswagen Aktiengesellschaft | Method for adaptation of a detected camshaft position, control unit for carrying out the method, internal combustion engine, and vehicle |
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