DE102005054739A1 - Injector for fuel injection in internal combustion engine e.g. piezo-actuator controlled common-rail-injector, has injector body whereby amount of injected fuel and rate is closely regulated - Google Patents
Injector for fuel injection in internal combustion engine e.g. piezo-actuator controlled common-rail-injector, has injector body whereby amount of injected fuel and rate is closely regulated Download PDFInfo
- Publication number
- DE102005054739A1 DE102005054739A1 DE102005054739A DE102005054739A DE102005054739A1 DE 102005054739 A1 DE102005054739 A1 DE 102005054739A1 DE 102005054739 A DE102005054739 A DE 102005054739A DE 102005054739 A DE102005054739 A DE 102005054739A DE 102005054739 A1 DE102005054739 A1 DE 102005054739A1
- Authority
- DE
- Germany
- Prior art keywords
- injector
- nozzle needle
- nozzle
- laser
- end mirror
- 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.)
- Granted
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 9
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 8
- 230000001105 regulatory effect Effects 0.000 title claims abstract 3
- 238000002347 injection Methods 0.000 title claims description 10
- 239000007924 injection Substances 0.000 title claims description 10
- 238000000034 method Methods 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 230000001066 destructive effect Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
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
- F02D41/20—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
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/063—Lift of the valve needle
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Stand der TechnikState of technology
Die Erfindung bezieht sich auf einen Injektor nach dem Oberbegriff des Patentanspruchs 1.The The invention relates to an injector according to the preamble of Patent claim 1.
Ein
CR-injektor der vorbezeichneten Art ist durch die
Die Mechanik moderner Hochdruck-Einspritzsysteme wird im Betrieb, z. B. im Fahrbetrieb von Kraftfahrzeugen, stark beansprucht. Hierdurch war es bislang faktisch unmöglich, Systeme herzustellen, deren Verhalten während der gesamten Lebensdauer hinreichend konstant bleibt.The Mechanics of modern high-pressure injection systems is in operation, z. B. in the driving of motor vehicles, heavily stressed. This was so far it is virtually impossible Systems produce their behavior throughout their lifetime remains sufficiently constant.
Abhilfe würde eine geschlossene Regelung der Kraftstoff-Einspritzmenge schaffen. Das Problem besteht jedoch in der Bereitstellung einer geeigneten Sensorik.remedy would one to provide closed regulation of the fuel injection quantity. The The problem, however, is the provision of suitable sensors.
Eine besondere Bedeutung erlangt die Notwendigkeit einer Anpassung der Kraftstoff-Einspritzmenge bei direkt angesteuerten Piezo-Injektoren, weil die Einspritzrate hier direkt durch den Aktorhub bestimmt wird. Aktoralterung führt dazu, dass der Zusammenhang zwischen Spannung und Aktorhub im Verlauf der Lebensdauer nicht konstant bleibt, so dass die Ansteuerung des Injektors an den Zustand des Aktors angepasst werden sollte.A particular importance is attached to the need to adapt Fuel injection quantity for directly controlled piezo injectors because the injection rate is determined here directly by the actuator stroke. Actuator aging causes that the relationship between voltage and actuator stroke in the course the lifetime does not remain constant, so that the control of the Injector should be adapted to the state of the actuator.
Aufgabe der Erfindung ist es, eine Möglichkeit für eine Regelung der vom Injektor zur Verfügung gestellten Kraftstoff-Einspritzmenge zu finden.task The invention is a possibility for one Control of the fuel injection quantity provided by the injector to find.
Vorteile der ErfindungAdvantages of invention
Ausgehend von der Erkenntnis, dass die Einspritzrate eines Injektors der in Rede stehenden Art sich durch die Position der Düsennadel bestimmt, wird die Aufgabe gemäß der Erfindung bei einem Injektor der eingangs bezeichneten Gattung durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst.outgoing from the realization that the injection rate of an injector of the Speech type determined by the position of the nozzle needle, the Task according to the invention in an injector of the type described by the characterizing Characteristics of claim 1 solved.
Da die Düsennadel, zumindest bei Einspritzventilen für Brennkraftmaschinen im Kraftfahrzeugbereich, optisch zugänglich ist, wird – in vorteilhafter Weiterbildung des Grundgedankens der Erfindung – vorgeschlagen, die Düsennadelbewegung durch ein optisches Messverfahren zu erfassen. Eine diesbezüglich bevorzugte Ausführungsform der Erfindung ist Patentanspruch 3 zu entnehmen. Sie beruht auf der interferometrischen Erfassung des Düsennadelhubs. Zur Messung der Düsennadelbewegung braucht lediglich die Anzahl der überstrichenen Interferenzen bestimmt zu werden. Ein großer Vorteil dieses Messverfahrens besteht darin, dass keine zusätzlichen bewegten Teile in den Injektor integriert werden müssen. Da die Signalhöhe der Interferenzen nicht benutzt wird, werden keine analogen Signale verarbeitet. Das sich hierdurch darstellende Messverfahren ist sehr robust. Die aus der Messung erhaltene Düsennadelposition ist absolut, weil sich die Messung auf die Position der Düsennadel im geschlossenen Zustand des Ventils bezieht.There the nozzle needle, at least in injection valves for internal combustion engines in the automotive sector, optically accessible is, will - in Advantageous development of the basic concept of the invention - proposed the nozzle needle movement to be detected by an optical measuring method. A preferred in this regard embodiment The invention is to claim 3. It is based on the interferometric detection of the nozzle needle stroke. To measure the Needle needle movement needs only the number of overflowed Interference to be determined. A big advantage of this measuring method is that no additional Moving parts must be integrated into the injector. There the signal height the interference is not used, no analog signals processed. The measuring method thereby represented is very robust. The nozzle needle position obtained from the measurement is absolute, because the measurement is based on the position of the nozzle needle in the closed state of the valve.
Weitere vorteilhafte Ausgestaltungen der Erfindung enthalten die Patentansprüche 4 bis 6.Further advantageous embodiments of the invention include the claims 4 to 6th
Zeichnungdrawing
Zur näheren Veranschaulichung der Erfindung dienen Ausführungsbeispiele, die in der Zeichnung dargestellt und im Folgenden detailliert beschrieben sind. Es zeigt (jeweils in schematischer Blockschaltbild-Darstellung):to closer Illustrative of the invention are exemplary embodiments, which in the Drawing shown and described in detail below. It shows (each in schematic block diagram representation):
Beschreibung der Ausführungsbeispieledescription the embodiments
Es
bezeichnet
Bei
der Ausführungsform
nach
Bewegt
sich die Düsennadel
Der
gemessene Intensitätsverlauf
rührt her aus
der Einkopplung des Laserlichts in den externen Resonator
Aus den gemäß vorstehender Schilderung gemessenen Daten lässt sich unschwer der Düsennadelhub und die dadurch bestimmte Einspritzmenge und -rate ermitteln. Die ermittelten Werte dienen als Regelgröße zur Ansteuerung der Steuermittel (z. B eines Magnetsteuerventils) des Injektors.Out according to the above Portrayal of measured data the nozzle needle stroke is not difficult and determine the injection quantity and rate determined thereby. The determined values serve as a control variable for controlling the control means (eg, a solenoid control valve) of the injector.
Die
Variante nach
Wie
bei der oben beschriebenen Ausführungsform
nach
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005054739.7A DE102005054739B4 (en) | 2005-11-17 | 2005-11-17 | Injector for injecting fuel into combustion chambers of internal combustion engines, in particular piezoactuator-controlled common rail injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005054739.7A DE102005054739B4 (en) | 2005-11-17 | 2005-11-17 | Injector for injecting fuel into combustion chambers of internal combustion engines, in particular piezoactuator-controlled common rail injector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE102005054739A1 true DE102005054739A1 (en) | 2007-05-24 |
| DE102005054739B4 DE102005054739B4 (en) | 2017-06-08 |
Family
ID=37989354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE102005054739.7A Expired - Fee Related DE102005054739B4 (en) | 2005-11-17 | 2005-11-17 | Injector for injecting fuel into combustion chambers of internal combustion engines, in particular piezoactuator-controlled common rail injector |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE102005054739B4 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016162180A1 (en) * | 2015-04-09 | 2016-10-13 | Continental Automotive Gmbh | Method and device for operating an injector |
| CN106460702A (en) * | 2014-06-13 | 2017-02-22 | 大陆汽车有限公司 | Method for characterizing a hydraulic coupling element of a piezo injector |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3826194A1 (en) * | 1988-08-02 | 1990-02-15 | Hommelwerke Gmbh | Device for length measurement |
| DE19519191C2 (en) * | 1995-05-24 | 1997-04-10 | Siemens Ag | Injector |
| DE19712374C2 (en) * | 1997-03-25 | 2001-07-19 | Bosch Gmbh Robert | Position and displacement sensor |
| DE19743156C2 (en) * | 1997-09-30 | 1999-08-12 | Bosch Gmbh Robert | Position or displacement sensor |
| DE19936668A1 (en) * | 1999-08-04 | 2001-02-22 | Bosch Gmbh Robert | Common rail injector |
| AT501574B1 (en) * | 2006-06-13 | 2008-01-15 | Avl List Gmbh | OPTICAL WAY SENSOR |
-
2005
- 2005-11-17 DE DE102005054739.7A patent/DE102005054739B4/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106460702A (en) * | 2014-06-13 | 2017-02-22 | 大陆汽车有限公司 | Method for characterizing a hydraulic coupling element of a piezo injector |
| WO2016162180A1 (en) * | 2015-04-09 | 2016-10-13 | Continental Automotive Gmbh | Method and device for operating an injector |
| DE102015206286B4 (en) * | 2015-04-09 | 2019-05-29 | Continental Automotive Gmbh | Method and device for operating an injector |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102005054739B4 (en) | 2017-06-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R012 | Request for examination validly filed |
Effective date: 20120823 |
|
| R016 | Response to examination communication | ||
| R018 | Grant decision by examination section/examining division | ||
| R020 | Patent grant now final | ||
| R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |