EP1577527A1 - Method for determining failed actuators of an internal combustion engine - Google Patents
Method for determining failed actuators of an internal combustion engine Download PDFInfo
- Publication number
- EP1577527A1 EP1577527A1 EP05100385A EP05100385A EP1577527A1 EP 1577527 A1 EP1577527 A1 EP 1577527A1 EP 05100385 A EP05100385 A EP 05100385A EP 05100385 A EP05100385 A EP 05100385A EP 1577527 A1 EP1577527 A1 EP 1577527A1
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- deviation
- actuator
- parameter
- measured variable
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000002485 combustion reaction Methods 0.000 title claims description 7
- 230000002950 deficient Effects 0.000 claims abstract description 15
- 230000001419 dependent effect Effects 0.000 claims abstract description 8
- 238000012935 Averaging Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 2
- 238000005259 measurement Methods 0.000 abstract 2
- 230000003679 aging effect Effects 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 241001136792 Alle Species 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000002405 diagnostic procedure Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
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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
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven elements
-
- 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
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D41/2096—Output circuits, e.g. for controlling currents in command coils for controlling piezoelectric injectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
- F02M65/007—Cleaning
- F02M65/008—Cleaning of injectors only
Definitions
- the invention relates to a method for the determination of defective Actuators of an internal combustion engine, in particular actuators self-igniting internal combustion engines.
- Injection system Injection system must have a diagnosis that detects faulty piezo actuators. Checking the piezo capacity has prevailed for it.
- Known diagnoses set a fixed upper and lower capacity threshold in the Diagnosis routine. Are the thresholds or the Limit values are exceeded upwards or downwards, so will the piezo actuator is detected as defective by the diagnostics routine.
- the value of the capacity of the piezo is very strong depends on the temperature of the component. So can an internal combustion engine Operating temperatures of -30 ° C to + 400 ° C reach.
- the piezo actuators can work at low temperatures have a capacity of, for example, 1.5 pF and at higher temperatures 6 ⁇ F.
- the invention has for its object to introduce a method for determining defective actuators of an internal combustion engine, which reliably detects in particular early occurring aging effects of actuators.
- the method for the determination of defective forms Actuators of an internal combustion engine with at least one Cylinder the mean, in particular the arithmetic mean, a measure of all existing on the cylinders Actuators of a kind, this measure of at least one Parameter depends.
- Each cylinder has at least one actuator on. So a cylinder can be several with piezo and / or with Magnet actuators have operated injectors, but as well with solenoid actuators operated inlet and outlet valves.
- the process forms a deviation, which is independent of the parameter. This ensures that that over the entire parameter range, the deviation constant remains.
- the limits, in particular the upper and lower limits, formed, those depending on the deviation and the above-formed mean are. If a single value of the measured variable exceeds one the two limits, so recognizes the inventive method this actuator as faulty or defective.
- Such a method according to the invention recognizes a defective one Actuator earlier and more accurate than a state of the art of the technique.
- an exchange of an actuator may be preferred be, for example at workshop intervals, before the Vehicle remains lying.
- the inventive Be carried out during vehicle operation, For example, if exhaust limits worsen.
- An advantageous embodiment of the invention is that the deviation from the number of available actuators one kind is dependent.
- a Cylinders have multiple actuators of different types. So can a cylinder valves, with magnetic actuators operated and magnetic actuators for injecting the Have fuel. These differ in the Purpose and in kind. So the deviation is only intended by one Actuator to be dependent on a type and purpose.
- a further advantageous embodiment of the invention is to use as parameter the time and / or the actuator temperature. This then offers the possibility of averaging the Store measured variable over the entire parameter range if the individual values are within the permitted limit band stay. This well-located mean will be in regular Time intervals formed and stored. Once a Single value exceeds the limits, the last saved Mean value used. This offers the advantage that the stored mean is independent of a faulty one Actuator is. Nevertheless, the time change remains due to aging.
- Another embodiment of the invention is with a such stored or stored mean the upper and lower limits narrower than the above limits define. This offers the possibility of defective actuators to recognize at a very early stage.
- the inventive method is not on piezo actuators limited, but can also be applied to magnetic actuators become.
- Figures 1 and 2 show a first embodiment of the method according to the invention. Both figures show a temperature dependence of the piezocapacities.
- the piezoelectric capacitance C is used as the measured variable u.
- the actuator temperature T a is used as parameter p.
- the curve C 1 represents the temperature dependence of the first piezoelectric actuator.
- the curve C 2 shows the temperature dependence of the capacitance of the second piezoelectric actuator, etc.
- the third actuator which is represented by the curve C 3
- the curve C 3 is defective by the temperature T 1 , because the curve C 3 exceeds the upper limit G + .
- the average ⁇ dependent on the individual values C 1 to C 3 has an upwardly directed dent 1 in the region around the temperature T 1 .
- This dimple 1 is transmitted to the limit value curves G + and G - , which can be seen as dimples 2 and 3 in FIG.
- the second embodiment which is reproduced in FIG. 3, shows an average ⁇ ok , which is independent of the defective piezo actuators.
- the mean value is formed in the same way as in FIG. This well-found mean value in FIG. 1 is stored as ⁇ ok . If a defective piezo actuator occurs at a later point in time, then a mean value ⁇ ok stored shortly before is used to define new limit values, which are identified by g + and g_. In contrast to the limit values from FIG. 1, these new limit values g + and g_ depend on the stored mean value ⁇ ok and on a new deviation ⁇ . This new deviation ⁇ is smaller than the deviation ⁇ .
- the curve C 3 of the third piezoelectric actuator exceeds the upper limit curve g + . Due to this exceeding of the limit value of this third piezoelectric actuator is detected as faulty. It should be noted that neither the new limit values g + and g_ nor the stored mean value ⁇ ok depend on the faulty third actuator which forms the curve C 3 .
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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)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Bestimmung von defekten Aktoren einer Brennkraftmaschine, insbesondere Aktoren von selbstzündenden Brennkraftmaschinen.The invention relates to a method for the determination of defective Actuators of an internal combustion engine, in particular actuators self-igniting internal combustion engines.
In einem mit beispielsweise Piezo-Aktoren betriebenen Common-Rail Einspritzsystem muss eine Diagnose vorhanden sein, die fehlerhafte Piezo-Aktoren erkennt. Die Überprüfung der PiezoKapazität hat sich dafür durchgesetzt. Bekannte Diagnosen setzen eine feste obere und untere Kapazitätsschwelle in der Diagnoseroutine fest. Werden die Schwellenwerte bzw. die Grenzwerte nach oben oder nach unten überschritten, so wird der Piezo-Aktor von der Diagnoseroutine als defekt erkannt. Allerdings ist der Wert der Kapazität des Piezos sehr stark von der Temperatur des Bauteils abhängig. So kann eine Brennkraftmaschine Betriebstemperaturen von -30°C bis +400°C erreichen. Die Piezo-Aktoren können bei niedrigen Temperaturen eine Kapazität von beispielsweise 1,5 pF aufweisen und bei höheren Temperaturen 6 µF. Daher ist es nicht ausreichend einen einzigen Grenzwert für die obere bzw. untere Kapazität zu definieren, um unter allen Betriebstemperaturen zuverlässig einen defekten Aktor zu bestimmen. Bekannte Diagnoseroutinen definieren konstante Grenzwerte für jeweils einen bestimmten Temperaturbereich, d. h. der Grenzwert, sei es nun der obere oder der untere, gleicht einer Treppenfunktion.In a common rail operated, for example, with piezo actuators Injection system must have a diagnosis that detects faulty piezo actuators. Checking the piezo capacity has prevailed for it. Known diagnoses set a fixed upper and lower capacity threshold in the Diagnosis routine. Are the thresholds or the Limit values are exceeded upwards or downwards, so will the piezo actuator is detected as defective by the diagnostics routine. However, the value of the capacity of the piezo is very strong depends on the temperature of the component. So can an internal combustion engine Operating temperatures of -30 ° C to + 400 ° C reach. The piezo actuators can work at low temperatures have a capacity of, for example, 1.5 pF and at higher temperatures 6 μF. Therefore, it is not enough one single upper or lower capacity limit Define to be reliable under all operating temperatures to determine a defective actuator. Known diagnostic routines define constant limits for each one specific Temperature range, d. H. the limit, be it the upper one or the lower, resembles a staircase function.
So ist es bei diesem bekannten Verfahren insbesondere
nachteilig, da der Abstand zum oberen und zum unteren Grenzwert
trotz der Anpassung groß gewählt werden muss. Defekte
Piezo-Aktoren werden damit sehr spät erkannt. Außerdem ist
mit einem solchen bekannten Diagnoseverfahren nicht möglich
Alterungseffekte von Piezos zuverlässig zu erkennen.
Somit liegt der Erfindung die Aufgabe zugrunde, ein Verfahren
zur Bestimmung von defekten Aktoren einer Brennkraftmaschine
vorzustellen, das insbesondere frühzeitig auftretende Alterungseffekte
von Aktoren zuverlässig erkennt.So it is particularly disadvantageous in this known method, since the distance to the upper and lower limit must be chosen to be large despite the adjustment. Defective piezo actuators are detected very late. In addition, it is not possible to reliably detect the aging effects of piezos with such a known diagnostic method.
Thus, the invention has for its object to introduce a method for determining defective actuators of an internal combustion engine, which reliably detects in particular early occurring aging effects of actuators.
Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst. Gegenstand der Ansprüche 2 bis 12 betreffen vorteilhafte Ausgestaltungen des erfindungsgemäßen Verfahrens.This object is solved by the features of claim 1. Subject matter of claims 2 to 12 relate to advantageous embodiments the method according to the invention.
Erfindungsgemäß bildet das Verfahren zur Bestimmung von defekten Aktoren einer Brennkraftmaschine mit mindestens einem Zylinder den Mittelwert, insbesondere den arithmetischen Mittelwert, einer Messgröße aller an den Zylindern vorhandenen Aktoren einer Art, wobei diese Messgröße von mindestens einem Parameter abhängt. Jeder Zylinder weist mindestens einen Aktor auf. So kann ein Zylinder mehrere mit Piezo und/oder mit Magnet-Aktoren betriebene Injektoren aufweisen, aber ebenso mit Magnet-Aktoren betriebene Ein- und Auslassventile. In einem nächsten Schritt bildet das Verfahren eine Abweichung, die vom Parameter unabhängig ist. Damit ist gewährleistet, dass über den gesamten Parameterbereich die Abweichung konstant bleibt. In einem nächsten Schritt werden die Grenzwerte, insbesondere die oberen und unteren Grenzwerte, gebildet, die von der Abweichung und vom oben gebildeten Mittelwert abhängig sind. Überschreitet ein Einzelwert der Messgröße eines der beiden Grenzwerte, so erkennt das erfindungsgemäße Verfahren diesen Aktor als fehlerhaft bzw. defekt.According to the invention, the method for the determination of defective forms Actuators of an internal combustion engine with at least one Cylinder the mean, in particular the arithmetic mean, a measure of all existing on the cylinders Actuators of a kind, this measure of at least one Parameter depends. Each cylinder has at least one actuator on. So a cylinder can be several with piezo and / or with Magnet actuators have operated injectors, but as well with solenoid actuators operated inlet and outlet valves. In one next step, the process forms a deviation, which is independent of the parameter. This ensures that that over the entire parameter range, the deviation constant remains. In a next step, the limits, in particular the upper and lower limits, formed, those depending on the deviation and the above-formed mean are. If a single value of the measured variable exceeds one the two limits, so recognizes the inventive method this actuator as faulty or defective.
Ein solches erfindungsgemäße Verfahren erkennt einen defekten Aktor früher und präziser als ein Verfahren nach dem Stand der Technik. Somit kann ein Austausch eines Aktors vorgezogen werden, beispielsweise bei Werkstattintervallen, bevor das Fahrzeug liegen bleibt. Des Weiteren kann das erfindungsgemäße Verfahren während des Fahrzeugbetriebes durchgeführt werden, wenn beispielsweise Abgasgrenzwerte sich verschlechtern.Such a method according to the invention recognizes a defective one Actuator earlier and more accurate than a state of the art of the technique. Thus, an exchange of an actuator may be preferred be, for example at workshop intervals, before the Vehicle remains lying. Furthermore, the inventive Be carried out during vehicle operation, For example, if exhaust limits worsen.
Eine vorteilhafte Ausgestaltung der Erfindung ist es, dass die Abweichung von der Anzahl der vorhandenen Aktoren einer Art abhängig ist. Wie bereits oben erwähnt wurde, kann ein Zylinder mehrere Aktoren unterschiedlicher Arten aufweisen. So kann ein Zylinder Ventile, die mit magnetischen Aktoren betrieben werden, und magnetische Aktoren zum Einspritzen des Brennkraftstoffes aufweisen. Diese unterscheiden sich im Zweck und in der Art. So soll die Abweichung nur von einem Aktor einer Art und Zweck abhängig sein.An advantageous embodiment of the invention is that the deviation from the number of available actuators one Kind is dependent. As mentioned above, a Cylinders have multiple actuators of different types. So can a cylinder valves, with magnetic actuators operated and magnetic actuators for injecting the Have fuel. These differ in the Purpose and in kind. So the deviation is only intended by one Actuator to be dependent on a type and purpose.
Als weitere vorteilhafte Erfindung ist es die untere Grenze
als auch die obere Grenze wie folgt zu definieren:
Eine weitere vorteilhafte Ausgestaltung der Erfindung ist es als Parameter die Zeit und/oder die Aktortemperatur heranzuziehen. Dies bietet dann die Möglichkeit den Mittelwert der Messgröße über den gesamten Parameterbereich abzuspeichern wenn die Einzelwerte innerhalb des erlaubten Grenzwertbandes bleiben. Dieser für gut befindliche Mittelwert wird in regelmäßigen Zeitabständen gebildet und abgespeichert. Sobald ein Einzelwert die Grenzwerte überschreitet, wird der zuletzt gespeicherte Mittelwert herangezogen. Dies bietet den Vorteil, dass der gespeicherte Mittelwert unabhängig von einem fehlerhaften Aktor ist. Nicht desto trotz bleibt die zeitliche Änderung aufgrund von Alterungserscheinungen berücksichtigt.A further advantageous embodiment of the invention is to use as parameter the time and / or the actuator temperature. This then offers the possibility of averaging the Store measured variable over the entire parameter range if the individual values are within the permitted limit band stay. This well-located mean will be in regular Time intervals formed and stored. Once a Single value exceeds the limits, the last saved Mean value used. This offers the advantage that the stored mean is independent of a faulty one Actuator is. Nevertheless, the time change remains due to aging.
Eine weitere Ausgestaltung der Erfindung ist es mit einem solchen hinterlegten bzw. abgespeicherten Mittelwert die oberen und unteren Grenzen enger als die oben genannten Grenzen zu definieren. Dies bietet die Möglichkeit, defekte Aktoren in einem sehr frühen Stadium zu erkennen.Another embodiment of the invention is with a such stored or stored mean the upper and lower limits narrower than the above limits define. This offers the possibility of defective actuators to recognize at a very early stage.
Das erfindungsgemäße Verfahren ist nicht auf Piezo-Aktoren beschränkt, sondern kann auch auf Magnet-Aktoren angewandt werden.The inventive method is not on piezo actuators limited, but can also be applied to magnetic actuators become.
Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den übrigen abhängigen Ansprüchen angegeben.Further advantageous embodiments of the invention are in the remaining dependent claims.
Die Erfindung wird nachfolgend unter Bezugnahme auf die schematische Zeichnung beispielhaft erläutert. Dabei zeigen:
- Figur 1
- die Temperaturabhängigkeit von den Piezoaktoren mit den erfindungsgemäß gebildeten Grenzwerten und dem erfindungsgemäß gebildeten Mittelwert;
- Figur 2
- die Temperaturabhängigkeiten der Kapazitäten der Piezoaktoren, wobei eine Kurve eines Piezos eine der Grenzen überschreitet;
- Figur 3
- die Temperaturabhängigkeiten der Kapazitäten der Piezoaktoren, wobei der Mittelwert unabhängig vom defekten Aktor ist.
- FIG. 1
- the temperature dependence of the piezoelectric actuators with the limit values formed according to the invention and the mean value formed according to the invention;
- FIG. 2
- the temperature dependencies of the capacitances of the piezoelectric actuators, wherein a curve of a piezo exceeds one of the limits;
- FIG. 3
- the temperature dependencies of the capacitances of the piezo actuators, wherein the mean value is independent of the defective actuator.
Figur 1 und 2 zeigen ein erstes Ausführungsbeispiel des erfindungsgemäßen Verfahrens. Beide Figuren zeigen eine Temperaturabhängigkeit der Piezokapazitäten. In diesem Ausführungsbeispiel wird als Messgröße u die Piezokapazität C herangezogen. Als Parameter p wird die Aktortemperatur Ta verwendet. Zur besseren Darstellbarkeit wurden lediglich drei Kurven C1 bis C3 eingezeichnet. Dabei stellt die Kurve C1 die Temperaturabhängigkeit des ersten Piezo-Aktors dar. Die Kurve C2 zeigt die Temperaturabhängigkeit der Kapazität des zweiten Piezo-Aktors usw.Figures 1 and 2 show a first embodiment of the method according to the invention. Both figures show a temperature dependence of the piezocapacities. In this embodiment, the piezoelectric capacitance C is used as the measured variable u. As parameter p, the actuator temperature T a is used. For better presentation, only three curves C 1 to C 3 were drawn. The curve C 1 represents the temperature dependence of the first piezoelectric actuator. The curve C 2 shows the temperature dependence of the capacitance of the second piezoelectric actuator, etc.
Der arithmetische Mittelwert dieser Kurven C1 bis C3 ist als µ dargestellt. Die Grenzwerte G+ und G- werden dadurch erzeugt, dass die Kurve µ um die Abweichung µ nach oben bzw. nach unten verschoben wird. Dies ist in den Figuren 1 und 2 gestrichelt dargestellt. Alle Kurven C1 bis C3 befinden sich innerhalb dieses durch die Grenzwerte definierten Bandes, wie in Figur 1 zu erkennen ist.The arithmetic mean of these curves C 1 to C 3 is shown as μ. The limit values G + and G- are generated by shifting the curve μ up or down by the deviation μ. This is shown by dashed lines in Figures 1 and 2. All curves C 1 to C 3 are within this band defined by the limits, as can be seen in FIG.
In Figur 2 ist im Gegensatz zu Figur 1 der dritte Aktor, der durch die Kurve C3 dargestellt ist, um die Temperatur T1 defekt, da die Kurve C3 die obere Grenze G+ überschreitet. Dies hat zur Folge, dass der von den Einzelwerten C1 bis C3 abhängige Mittelwert µ im Bereich um die Temperatur T1 eine nach oben gerichtete Delle 1 aufweist. Diese Delle 1 überträgt sich auf die Grenzwertkurven G+ und G-, die als Delle 2 und 3 in Figur 2 zu erkennen sind.In FIG. 2, in contrast to FIG. 1, the third actuator, which is represented by the curve C 3 , is defective by the temperature T 1 , because the curve C 3 exceeds the upper limit G + . As a result, the average μ dependent on the individual values C 1 to C 3 has an upwardly directed dent 1 in the region around the temperature T 1 . This dimple 1 is transmitted to the limit value curves G + and G - , which can be seen as dimples 2 and 3 in FIG.
Die zweite Ausführungsform die in Figur 3 wiedergegeben ist zeigt einen Mittelwert µok, der von den defekten Piezoaktoren unabhängig ist. Der Mittelwert wird genauso wie in Figur 1 gebildet. Dieser für gut befundene Mittelwert in Figur 1 wird als µok abgespeichert. Tritt zu einem späteren Zeitpunkt ein defekter Piezo-Aktor auf, so wird ein kurz zuvor abgespeicherter Mittelwert µok herangezogen, um neue Grenzwerte zu definieren, die mit g+ und g_ gekennzeichnet sind. Im Gegensatz zu den Grenzwerten aus Figur 1 hängen diese neuen Grenzwerte g+ und g_ vom gespeicherten Mittelwert µok und von einer neuen Abweichung δ ab. Diese neue Abweichung δ ist kleiner als die Abweichung µ.The second embodiment, which is reproduced in FIG. 3, shows an average μ ok , which is independent of the defective piezo actuators. The mean value is formed in the same way as in FIG. This well-found mean value in FIG. 1 is stored as μ ok . If a defective piezo actuator occurs at a later point in time, then a mean value μ ok stored shortly before is used to define new limit values, which are identified by g + and g_. In contrast to the limit values from FIG. 1, these new limit values g + and g_ depend on the stored mean value μ ok and on a new deviation δ. This new deviation δ is smaller than the deviation μ.
Wie in Figur 3 zu erkennen ist, überschreitet die Kurve C3 des dritten Piezoaktors die obere Grenzwertkurve g+. Aufgrund dieser Überschreitung des Grenzwertes wird dieser dritte Piezoaktor als fehlerhaft erkannt. Anzumerken ist, dass weder die neuen Grenzwerte g+ und g_ als auch der abgespeicherte Mittelwert µok von dem fehlerhaften dritten Aktor abhängt, der die Kurve C3 bildet.As can be seen in FIG. 3, the curve C 3 of the third piezoelectric actuator exceeds the upper limit curve g + . Due to this exceeding of the limit value of this third piezoelectric actuator is detected as faulty. It should be noted that neither the new limit values g + and g_ nor the stored mean value μ ok depend on the faulty third actuator which forms the curve C 3 .
Denkbar ist, anstatt der Kapazität, die Induktivität eines Magnet-Aktors in Abhängigkeit der Temperatur zu überprüfen, um fehlerhafte Magnet-Aktoren zu detektieren. Ferner ist es zusätzlich oder alternativ dazu den elektrischen Widerstand des Aktors als Parameter heranzuziehen.It is conceivable, instead of the capacity, the inductance of a To check the magnetic actuator as a function of the temperature to detect faulty solenoid actuators. It is further additionally or alternatively, the electrical resistance of the actuator as a parameter.
Claims (12)
dadurch gekennzeichnet, dass der untere Grenzwert (G_) wie folgt gebildet wird: G_ = µ(p) - µ ;
wobei µ der Mittelwert der Messgröße u ist und vom Parameter p abhängt und µ für die Abweichung steht.Method according to at least one of the preceding claims,
characterized in that the lower limit value (G_) is formed as follows: G_ = μ (p) - μ;
where μ is the mean value of the measured variable u and depends on the parameter p and μ stands for the deviation.
dadurch gekennzeichnet, dass der obere Grenzwert (G+) wie folgt gebildet wird: G+ = µ(p) + µ ;
wobei µ der Mittelwert der Messgröße u ist und vom Parameter p abhängt und µ für die Abweichung steht.Method according to at least one of the preceding claims,
characterized in that the upper limit (G + ) is formed as follows: G + = μ (p) + μ;
where μ is the mean value of the measured variable u and depends on the parameter p and μ stands for the deviation.
dadurch gekennzeichnet, dass der Parameter (p) gleich der Zeit (t) ist.Method according to at least one of the preceding claims,
characterized in that the parameter (p) is equal to the time (t).
dadurch gekennzeichnet, dass der Parameter (p) gleich der Aktortemperatur (Ta) ist.Method according to at least one of the preceding claims,
characterized in that the parameter (p) is equal to the actuator temperature (T a ).
dadurch gekennzeichnet, dass die Mittelwertbildung der Messgröße (u) über den gesamten Parameterbereich abgespeichert wird, wenn über den gesamten Parameterbereich keiner der Einzelwerte (ui) der Messgröße (u) die beiden Grenzwerte (G_) und (G+) überschreitet.Method according to at least one of the preceding claims,
characterized in that the averaging of the measured variable (u) over the entire parameter range is stored when over the entire parameter range none of the individual values (u i ) of the measured variable (u) exceeds the two limit values (G_) and (G + ).
G+ = µok(p) + µ;
wobei µok der gespeicherte Mittelwert der Messgröße u ist und vom Parameter p abhängt und µ für die neue Abweichung steht, wobei die neue Abweichung µ kleiner als die Abweichung µ ist.A method according to claim 7, characterized in that after storing the average value (μ ok ), the upper limit value G + is formed as follows:
G + = μ ok (p) + μ;
where μ ok is the stored mean value of the measured variable u and depends on the parameter p and μ stands for the new deviation, the new deviation μ being smaller than the deviation μ.
G_ = µok (p) - µ;
wobei µok der gespeicherte Mittelwert der Messgröße u ist und vom Parameter p abhängt und µ für die neue Abweichung steht, wobei die neue Abweichung µ kleiner als die Abweichung µ ist.Method according to claims 7 and 8, characterized in that after storing the mean value (μ ok ) the lower limit value (G_) is formed as follows:
G_ = μ ok (p) - μ;
where μ ok is the stored mean value of the measured variable u and depends on the parameter p and μ stands for the new deviation, the new deviation μ being smaller than the deviation μ.
dadurch gekennzeichnet, dass eine Art eines Aktors ein Piezoelement ist und die Messgröße (u) die Aktorkapazität (C) ist.Method according to at least one of the preceding claims,
characterized in that one type of actuator is a piezo element and the measurand (u) is the actuator capacitance (C).
dadurch gekennzeichnet, dass eine Art eines Aktors eine Magnetspule ist und die Messgröße (u) die Aktorinduktivität ist.Method according to at least one of claims 1 to 9,
characterized in that one type of actuator is a magnetic coil and the measured variable (u) is the Aktorinduktivität.
dadurch gekennzeichnet, dass die Messgröße (u) der elektrische Widerstand des Aktors ist.Method according to at least one of the preceding claims,
characterized in that the measured variable (u) is the electrical resistance of the actuator.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004012491A DE102004012491B4 (en) | 2004-03-15 | 2004-03-15 | Method for determining defective actuators of an internal combustion engine |
DE102004012491 | 2004-03-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1577527A1 true EP1577527A1 (en) | 2005-09-21 |
EP1577527B1 EP1577527B1 (en) | 2006-07-26 |
Family
ID=34833118
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05100385A Ceased EP1577527B1 (en) | 2004-03-15 | 2005-01-21 | Method for determining failed actuators of an internal combustion engine |
Country Status (3)
Country | Link |
---|---|
US (1) | US7146269B2 (en) |
EP (1) | EP1577527B1 (en) |
DE (2) | DE102004012491B4 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009071393A1 (en) * | 2007-12-07 | 2009-06-11 | Robert Bosch Gmbh | Method for operating a piezoelectric actuator |
EP1843028A3 (en) * | 2006-04-07 | 2009-12-30 | Robert Bosch Gmbh | Method for leakage testing of a fuel injector comprising a solenoid valve |
EP3910101A1 (en) * | 2020-05-14 | 2021-11-17 | KARL MAYER STOLL R&D GmbH | Method for maintaining a warp knitting machine |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009067051A1 (en) * | 2007-11-21 | 2009-05-28 | Volvo Construction Equipment Ab | Method for calibrating sensors |
DE102013208528B3 (en) | 2013-05-08 | 2014-08-21 | Continental Automotive Gmbh | Method for determining the opening and / or closing time of the nozzle needle of an injection valve |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6619245B1 (en) * | 1999-12-02 | 2003-09-16 | Nissan Motor Co., Ltd. | Failsafe control system and method for an electromagnetically driven valve |
DE10236819A1 (en) * | 2002-08-10 | 2004-02-26 | Robert Bosch Gmbh | Operating method for actuator with capacitive element used for fuel injector for automobile IC engine with function monitoring of parallel resistor |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60184948A (en) * | 1984-03-02 | 1985-09-20 | Toyota Motor Corp | Fuel injection learning control method for respective cylinder of electronically controlled diesel engine |
DE19536109A1 (en) * | 1995-09-28 | 1997-04-03 | Bosch Gmbh Robert | Method and device for monitoring a fuel metering system |
DE19845042C2 (en) | 1998-09-30 | 2000-08-24 | Siemens Ag | Method and arrangement for diagnosing a capacitive actuator |
-
2004
- 2004-03-15 DE DE102004012491A patent/DE102004012491B4/en not_active Expired - Fee Related
-
2005
- 2005-01-21 DE DE502005000046T patent/DE502005000046D1/en active Active
- 2005-01-21 EP EP05100385A patent/EP1577527B1/en not_active Ceased
- 2005-02-24 US US11/065,675 patent/US7146269B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6619245B1 (en) * | 1999-12-02 | 2003-09-16 | Nissan Motor Co., Ltd. | Failsafe control system and method for an electromagnetically driven valve |
DE10236819A1 (en) * | 2002-08-10 | 2004-02-26 | Robert Bosch Gmbh | Operating method for actuator with capacitive element used for fuel injector for automobile IC engine with function monitoring of parallel resistor |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1843028A3 (en) * | 2006-04-07 | 2009-12-30 | Robert Bosch Gmbh | Method for leakage testing of a fuel injector comprising a solenoid valve |
WO2009071393A1 (en) * | 2007-12-07 | 2009-06-11 | Robert Bosch Gmbh | Method for operating a piezoelectric actuator |
EP3910101A1 (en) * | 2020-05-14 | 2021-11-17 | KARL MAYER STOLL R&D GmbH | Method for maintaining a warp knitting machine |
Also Published As
Publication number | Publication date |
---|---|
EP1577527B1 (en) | 2006-07-26 |
DE102004012491B4 (en) | 2008-12-24 |
DE502005000046D1 (en) | 2006-09-07 |
US20050199051A1 (en) | 2005-09-15 |
DE102004012491A1 (en) | 2005-10-13 |
US7146269B2 (en) | 2006-12-05 |
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