DE10225911B3 - Method and device for measuring and regulating the closing and opening times of a piezo control valve - Google Patents
Method and device for measuring and regulating the closing and opening times of a piezo control valve Download PDFInfo
- Publication number
- DE10225911B3 DE10225911B3 DE2002125911 DE10225911A DE10225911B3 DE 10225911 B3 DE10225911 B3 DE 10225911B3 DE 2002125911 DE2002125911 DE 2002125911 DE 10225911 A DE10225911 A DE 10225911A DE 10225911 B3 DE10225911 B3 DE 10225911B3
- Authority
- DE
- Germany
- Prior art keywords
- control valve
- piezo
- end position
- time
- pressure
- 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.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000001105 regulatory effect Effects 0.000 title description 4
- 239000000446 fuel Substances 0.000 claims abstract description 33
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 238000011156 evaluation Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 description 10
- 238000002347 injection Methods 0.000 description 10
- 239000007924 injection Substances 0.000 description 10
- 230000008569 process Effects 0.000 description 8
- 238000010606 normalization Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 208000003028 Stuttering Diseases 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002800 charge carrier Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000008092 positive effect 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
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M57/00—Fuel-injectors combined or associated with other devices
- F02M57/02—Injectors structurally combined with fuel-injection pumps
- F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
- F02M57/023—Injectors structurally combined with fuel-injection pumps characterised by the pump drive mechanical
-
- 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
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2055—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit with means for determining actual opening or closing time
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements
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
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Messen der Zeitdauer, die die Ventilnadel (50) eines Steuerventils (21) einer Piezo-Pumpe-Düsen-Einheit benötigt, um von einer ersten Endposition (64) in eine zweite Endposition (65) zu gelangen. Wobei die Zeitdauer in Abhängigkeit von der am Steuerventil (21) angelegten Spannung (u (t)) und/oder des angelegten Stromes (i (t)) ermittelt wird, und das Stellsignal zu einem Zeitpunkt erzeugt wird, in dem gewährleistet ist, dass der Druck im Steuerventil (21) während der Messung weitgehend dem Druck des Kraftstoff-Niederdruckbereiches (31) entspricht.The invention relates to a method and a device for measuring the length of time that the valve needle (50) of a control valve (21) of a piezo pump nozzle unit needs to move from a first end position (64) to a second end position (65) reach. The duration is determined as a function of the voltage (u (t)) and / or the current (i (t)) applied to the control valve (21), and the control signal is generated at a point in time at which it is ensured that the pressure in the control valve (21) largely corresponds to the pressure of the low-pressure fuel region (31) during the measurement.
Description
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Messen der Zeitdauer, die eine Ventilnadel eines Piezo-Steuerventils benötigt, um von einer ersten Endposition in eine zweite Endposition zu gelangen.The invention relates to a method and a device for measuring the length of time that a valve needle a piezo control valve needed to get from a first end position to a second end position.
Piezo-Steuerventile werden in Piezo-Pumpe-Düse Einheiten
(PPE) zur Kraftstoffmengenzumessung in Brennkraftmaschinen verwendet.
Aus der
Ded Schließzeitpunkt des Steuerventils bestimmt somit den Zeitpunkt der Kraftstoffeinspritzung und die Schließzeitdauer die Einspritzmenge.Ded closing time of the control valve thus determines the time of fuel injection and the Closing time the injection quantity.
Die Betätigungseinheit der PPE besteht aus einem Piezo-Aktor.The actuation unit of the PPE exists from a piezo actuator.
Die Ausdehnung des Piezo-Aktor ist proportional zu der am Piezo-Aktor anliegenden Spannung (u(t)) und/oder des artgelegten Stroms (i(t)). Damit die Einspritzmengenstreuung möglichst gering ist, muss der Piezo-Aktor zur Einstellung von Beginn, Dauer und Ende des Einspritzvorgangs möglichst exakt durch eine genau definierte Spannung (u(t)) und/oder einen genau definierten Stromes (i(t)) angesteuert werden. Verschleiß, Alterungsprozesse und Temperaturänderungen führen zu veränderten Schließ- und Öffnungszeiten des Piezosteuerventils, wodurch eine genaue Kraftstoffeinspritzmengensteuerung nicht mehr gewährleistet ist.The expansion of the piezo actuator is proportional to the voltage applied to the piezo actuator (u (t)) and / or of the applied current (i (t)). So that the injection quantity spread preferably is low, the piezo actuator must be used to set the start and duration and end of the injection process if possible exactly by a precisely defined voltage (u (t)) and / or one precisely defined current (i (t)) can be controlled. Wear, aging processes and temperature changes to lead to changed closing and opening times of the piezo control valve, which enables precise fuel injection quantity control no longer guaranteed is.
Aus der
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zu realisieren, welche die tatsächlichen Schließ- und Öffnungszeiten des Steuerventils genau bestimmen. Die Aufgabe wird gelöst durch die Merkmale der unabhängigen Patentansprüche. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen gekennzeichnet.The invention is based on the object Realize method and an apparatus which the actual closing and opening times of the control valve precisely. The task is solved by the features of the independent claims. advantageous Embodiments of the invention are characterized in the subclaims.
Die Erfindung zeichnet sich dadurch aus, dass die Messung der tatsächlichen Schließ- und Öffnungszeit des Steuerventils, in Abhängigkeit von der am Steuerventil angelegten Spannung (u (t)) und/oder des angelegten Stromes (i(t)), innerhalb des Zeitintervalls durchgeführt wird, in dem der Druck im Steuer ventil weitgehend dem Druck des Niederdruckbereiches entspricht. Hierdurch können die durch die Hydraulik hervorgerufenen, sehr starken Druckstöße, die beim schnellen Schließen beziehungsweise Öffnen der Ventilnadel entstehen, vermieden werden. Dies wirkt sich positiv auf das Schließ- und Öffnungsverhalten der Ventilnadel aus. Insbesondere wird ein durch die Druckstöße verursachter, stotternder Ventilnadelhub vermieden, wodurch die Schließ- beziehungsweise Öffnungszeiten des Steuerventils genauer bestimmt werden können.The invention is characterized by this from that measuring the actual closing and opening hours of the control valve, depending from the voltage applied to the control valve (u (t)) and / or the applied current (i (t)) is carried out within the time interval, in which the pressure in the control valve largely the pressure of the low pressure area equivalent. This can the very strong pressure surges caused by the hydraulics, the when closing quickly or opening the valve needle arise, be avoided. This has a positive effect on the closing and opening behavior the valve needle. In particular, a stuttering valve needle stroke avoided, which means the closing or opening times of the Control valve can be determined more precisely.
Eine vorteilhafte Ausgestaltung der Erfindung sieht vor, das Messen der Zeitdauer zum Bewegen der Ventilnadel, von der einen Endposition in die andere Endposition, am laufenden Motor, innerhalb der Zeitspanne durchzuführen, innerhalb der sich die Nockenwelle bezogen auf den Pumpenkolben der Einspritzdüse beziehungsweise auf die entsprechenden Übertragungsglieder, innerhalb ihres Grundkreises befindet. In dieser Zeit verharrt der Pumpenkolben der Pumpeneinheit in seiner oberen Endstellung, der Druck im Steuerventil entspricht somit annähernd dem Druck im Kraftstoff-Niederdruckbereich.An advantageous embodiment of the Invention provides for measuring the time period for moving the valve needle, from one end position to the other end position, in progress Engine to perform within the time span within which the camshaft based on the pump piston of the injection nozzle or on the corresponding transmission links, located within their base circle. During this time the Pump piston of the pump unit in its upper end position, the Pressure in the control valve thus approximately corresponds to the pressure in the low-pressure fuel range.
Eine weitere vorteilhafte Ausgestaltung der Erfindung sieht vor, das Messen der Zeitdauer zum Bewegen der Ventilnadel, von der einen Endposition in die andere Endposition, bei stehender Nockenwelle (Motor Aus) durchzuführen. Der Pumpenkolben führt in diesem Fall keinen Hub durch und es ist gewährleistet, dass ein Bewegen der Ventilnadel zu keinen Druckstößen innerhalb des Steuerventils führt.Another advantageous embodiment the invention provides for measuring the length of time for moving the Valve needle, from one end position to the other end position, to be carried out with the camshaft stationary (engine off). The pump piston leads in this Do not drop through and it is guaranteed that moving the valve needle to no pressure surges within the control valve leads.
Die Erfindung wird nachstehend anhand der Zeichnungen näher erläutert. Es zeigt:The invention is illustrated below the drawings closer explained. It shows:
Die Pumpeneinheit
Wird das Steuerventil
Die erste Endposition kann auch die
Position sein, bei der das Steuerventil
Die Ansteuerung der Ventilnadel
Die Regeleinrichtung beinhaltet,
den Sensor
Sobald das Programm zur Regelung
der Ventilschließzeit
startet, erfolgt zunächst
in einem ersten Schritt S0 eine Messung, welche ermittelt, ob die
Nockenwelle
Dreht sich die Nockenwelle
Trifft die Ventilnadel
Claims (7)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002125911 DE10225911B3 (en) | 2002-06-11 | 2002-06-11 | Method and device for measuring and regulating the closing and opening times of a piezo control valve |
EP03756964A EP1511928A1 (en) | 2002-06-11 | 2003-06-03 | Method and device for measuring and regulating the closing and opening period of a piezo control valve |
PCT/DE2003/001858 WO2003104633A1 (en) | 2002-06-11 | 2003-06-03 | Method and device for measuring and regulating the closing and opening period of a piezo control valve |
US11/009,980 US20050121535A1 (en) | 2002-06-11 | 2004-12-10 | Method and device for measuring and regulating the closing and opening times of a piezo control valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002125911 DE10225911B3 (en) | 2002-06-11 | 2002-06-11 | Method and device for measuring and regulating the closing and opening times of a piezo control valve |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10225911B3 true DE10225911B3 (en) | 2004-02-12 |
Family
ID=29723121
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2002125911 Expired - Fee Related DE10225911B3 (en) | 2002-06-11 | 2002-06-11 | Method and device for measuring and regulating the closing and opening times of a piezo control valve |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1511928A1 (en) |
DE (1) | DE10225911B3 (en) |
WO (1) | WO2003104633A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005032087A1 (en) * | 2005-07-08 | 2007-01-18 | Siemens Ag | Method of controlling fuel injection valve for motor vehicle internal combustion (IC) engine, involves determining closing time of nozzle needle, then determining control period for control drive of switching valve based on closing time |
DE102012204278A1 (en) * | 2012-03-19 | 2013-09-19 | Continental Automotive Gmbh | Method for operating fuel injection system of internal combustion engine, involves determining force acting on passive piezo area, and applying signal of force sensor for detection and regulation of movement of closure element |
DE102004037255B4 (en) * | 2004-07-31 | 2016-06-09 | Robert Bosch Gmbh | Method for operating a fuel injection device, in particular for a motor vehicle |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10359675B3 (en) | 2003-12-18 | 2005-07-07 | Volkswagen Mechatronic Gmbh & Co. Kg | Method and device for controlling a valve and method and device for controlling a pump-nozzle device with the valve |
DE102004020937B4 (en) * | 2004-04-28 | 2010-07-15 | Continental Automotive Gmbh | Method for determining a closing time of a closing element and circuit arrangement |
DE102004027291B4 (en) | 2004-06-04 | 2009-11-26 | Continental Automotive Gmbh | Method and device for controlling a valve |
DE102015206795A1 (en) * | 2015-04-15 | 2016-10-20 | Continental Automotive Gmbh | Method for operating a piezo-controlled direct-operated injection valve |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19910388C2 (en) * | 1999-03-09 | 2001-03-29 | Siemens Ag | Method for checking a capacitive actuator |
DE10038995A1 (en) * | 1999-10-16 | 2001-04-19 | Bosch Gmbh Robert | Fuel metering control method for i.c. engine has setting element for fuel feed valve controlled to provide intermediate valve position under given operating conditions |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1172541B1 (en) * | 2000-07-01 | 2005-03-23 | Robert Bosch GmbH | Piezoelectric actuator for injector and/or injection system |
DE10146747A1 (en) * | 2001-09-22 | 2003-04-10 | Bosch Gmbh Robert | Fuel injection device for an internal combustion engine |
-
2002
- 2002-06-11 DE DE2002125911 patent/DE10225911B3/en not_active Expired - Fee Related
-
2003
- 2003-06-03 EP EP03756964A patent/EP1511928A1/en not_active Withdrawn
- 2003-06-03 WO PCT/DE2003/001858 patent/WO2003104633A1/en not_active Application Discontinuation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19910388C2 (en) * | 1999-03-09 | 2001-03-29 | Siemens Ag | Method for checking a capacitive actuator |
DE10038995A1 (en) * | 1999-10-16 | 2001-04-19 | Bosch Gmbh Robert | Fuel metering control method for i.c. engine has setting element for fuel feed valve controlled to provide intermediate valve position under given operating conditions |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004037255B4 (en) * | 2004-07-31 | 2016-06-09 | Robert Bosch Gmbh | Method for operating a fuel injection device, in particular for a motor vehicle |
DE102005032087A1 (en) * | 2005-07-08 | 2007-01-18 | Siemens Ag | Method of controlling fuel injection valve for motor vehicle internal combustion (IC) engine, involves determining closing time of nozzle needle, then determining control period for control drive of switching valve based on closing time |
DE102012204278A1 (en) * | 2012-03-19 | 2013-09-19 | Continental Automotive Gmbh | Method for operating fuel injection system of internal combustion engine, involves determining force acting on passive piezo area, and applying signal of force sensor for detection and regulation of movement of closure element |
Also Published As
Publication number | Publication date |
---|---|
EP1511928A1 (en) | 2005-03-09 |
WO2003104633A1 (en) | 2003-12-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8100 | Publication of the examined application without publication of unexamined application | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: VOLKSWAGEN MECHATRONIC GMBH & CO. KG, 09366 STOLLB |
|
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: SIEMENS VDO MECHATRONIC GMBH & CO. KG, 09366 S, DE |
|
8327 | Change in the person/name/address of the patent owner |
Owner name: CONTINENTAL AUTOMOTIVE GMBH, 30165 HANNOVER, DE |
|
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |