EP2140125A1 - Verfahren und datenträger zum auslesen und/ oder speichern von injektorspezifischen daten zur steuerung eines einspritzsystems einer brennkraftmaschine - Google Patents
Verfahren und datenträger zum auslesen und/ oder speichern von injektorspezifischen daten zur steuerung eines einspritzsystems einer brennkraftmaschineInfo
- Publication number
- EP2140125A1 EP2140125A1 EP08736353A EP08736353A EP2140125A1 EP 2140125 A1 EP2140125 A1 EP 2140125A1 EP 08736353 A EP08736353 A EP 08736353A EP 08736353 A EP08736353 A EP 08736353A EP 2140125 A1 EP2140125 A1 EP 2140125A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- data
- injector
- data carrier
- voltage value
- stored
- 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
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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2432—Methods of calibration
- F02D41/2435—Methods of calibration characterised by the writing medium, e.g. bar code
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
- F02D41/2464—Characteristics of actuators
- F02D41/2467—Characteristics of actuators for injectors
Definitions
- Method and data carrier for reading out and / or storing injector-specific data for controlling an injection system of an internal combustion engine.
- the invention relates to a method for reading out and / or storing injector-specific data according to the features of the preamble of patent claim 1 and a data carrier which can be controlled in this respect.
- Fuel injectors for operating an internal combustion engine have generally been known for many years.
- the fuel supply into the respective combustion chamber of the internal combustion engine is effected by injectors, in particular by piezo injectors.
- the quality of the combustion depends on the injection accuracy of the injectors.
- the injector With the calibration data determined thereby, which are stored in a control unit, the injector can then be controlled accordingly.
- the calibration data must be retransmitted from the injectors to the control unit. For this, a communication possibility between the injectors and the control unit must be ensured.
- the data carrier is connected to the control unit in a first time period and during a second time period, before a startup of the internal combustion engine, electrically and / or mechanically disconnected from the control unit.
- the underlying object of the present invention is to optimize a method of the type mentioned above with regard to the storage and read-out of injector-specific data, and to provide a data carrier for storing and / or reading injector-specific data, which only has to be mounted once and in which an electrical connection between the control unit and the data carrier need not be disconnected.
- a further advantageous embodiment of the invention is that the data carrier is identical to the previously already used in the injector bleeder.
- the functionality of the bleeder resistor is integrated in the data carrier. Therefore, in the production of the injectors, the settings of the production machines do not have to be changed, because now instead of a bleeder a structurally identical data carrier is used. Furthermore, it is also possible to use a data carrier which is not identical to the bleeder resistor, with a cost saving in the case of high-volume production being obtained here.
- a power unit for discharging the injectors during normal injection operation is located entirely within the data carrier. This offers the advantage that the power loss in the control unit can be reduced. Furthermore, this also reduces the injector-specific electromagnetic interference. This offers a special advantage with overlapping multiple injections. These can now be made much more flexible.
- Another embodiment of the invention is that a predefinable amount of data is read out or stored before or during or after a shutdown of the internal combustion engine. This reduces the requirements for the components of the data carrier and / or the number of components of the data carrier can be reduced.
- a further advantageous embodiment of the invention is that the disk can be clamped directly to the high voltage line connected to the injector.
- a Power supply unit located on the data carrier is designed in such a way that, on the one hand, it supplies the injector with the necessary voltage, such as 3.3V, and on the other hand, it can be charged with an injector-specific drive voltage, such as, for example, 350V.
- the present method is applicable to all systems in which an energy-storing element is connected to a control unit.
- magnetic components such as magnetic injectors or solenoid valves, when the principle of dual voltage and current and thus all voltage signals with current signals, parallel with series connection and the capacitive piezo is reversed with the inductive coil.
- a further advantageous embodiment of the invention consists in that the transmission reliability of the data is increased by error correction methods, in particular parity checks, checksums, or multiple transmissions.
- operating data can also be stored in the data carrier, which can then be analyzed in returns, callbacks or exchange programs, and quality improvement measures can be initiated as a function of these operating data.
- FIG. 1 shows a switching arrangement with a data carrier and an injector in a first embodiment
- FIG. 2 shows a switching arrangement with a data carrier and an injector according to FIG. 1 in a second embodiment
- FIG. 3 shows a detailed embodiment of the switching arrangement according to FIG. 1,
- FIG. 4 shows a voltage curve, by means of which a buffering or readout of a data quantity takes place
- FIG. 5 shows a flowchart for reading out a data volume from the data carrier
- FIG. 6 shows a flowchart for storing a data volume in the data carrier.
- the switching arrangement includes an injector 1, which can be charged to a voltage value of 0V to 30V by a control unit, not shown.
- the discharge of the injector 1 is effected by a power unit located in the data carrier 2 or by the control unit, wherein the data carrier 2 is connected in parallel to the injector 1.
- the data carrier 2 is advantageously designed as an ASIC.
- the injector voltage is measured by means of a measuring unit 3.
- the data carrier 2 and the injector 1 are connected by means of connecting lines 4 with the control unit, not shown.
- FIG. 2 shows a circuit arrangement with a data carrier and an injector according to Figure 1 in a second embodiment.
- the disk 2 has here additional connections.
- the data carrier 2 can have a connection for an additional power supply line 8.
- two further connections are provided on the data carrier 2, via which measured values of at least one measuring unit 6 can be received.
- Further connections on the data carrier 2 are used to control actuators 7 and / or to exchange data with a data unit 5.
- a bus line is preferably used for the data exchange.
- 3 shows a circuit arrangement with an injector 1 and the individual components of the data carrier 2.
- the data carrier 2 has a power unit 23, by means of which the injector 1 is discharged. Control signals 25 of a storage unit 22 arranged upstream of the power unit 23 determine the time and duration for the discharge of the injector 1.
- the data carrier furthermore optionally comprises an activator 20 connected in parallel to the injector 1, which activates a power supply unit 21 only when a stored injector voltage pattern is present.
- This power supply unit 21 is connected to the voltage applied to the injector 1 line and supplies the memory unit 22 with energy.
- the memory unit 22 for example, the rewritable calibration data of the injector 1 are stored.
- the memory unit 22 is communicated before a data exchange with the control unit, not shown, by means of a signal via a line 24, whether calibration data of the injector 1 are read or stored.
- the line 24 corresponds to a branch of the voltage applied to the power unit 23 line.
- FIG. 4 shows a temporal voltage profile Sp in the case of a memory or a read-out process of a dataset.
- a limit range is defined, for example, between OV and 30V. Furthermore, it has proved to be advantageous that the following relationship applies:
- This limit range is chosen so that on the one hand the injector does not yet inject, on the other hand the control unit can charge the injector and measure its voltage.
- the data carrier is informed by the control unit based on the voltage curve measured at the injector, whether a data volume is to be read out or stored.
- the voltage curve at the injector is determined by the charge and / or the discharge of the injector.
- the charging of the injector is always carried out by the control unit, while the discharge of the injector takes place when storing the amount of data by the control unit and when reading the amount of data by the power unit. Furthermore, the discharge of the injector takes place in the period between t2 and t3, as well as during synchronization by the control unit.
- a read-out of the data quantity is detected by the data carrier when the first time period defined by the two times t1 and t2 is greater than a stored first setpoint time period, and the voltage curve measured at the injector is greater than the upper threshold value U0. Furthermore, the voltage curve Sp must be below the threshold defined by the lower threshold value Uu for a second time interval between the times t3 and t4. It has proved to be advantageous that the first setpoint period, in which the voltage curve is greater than an upper threshold Uo, 5ms and the second period in which the voltage curve is below the lower threshold Uu, lms amounts to.
- the data carrier recognizes that a data quantity is to be stored if the first time interval between the two times t1 and t2 is greater than a stored second nominal time period.
- the voltage curve Sp for the second period between the predeterminable times t3 and t4 must be below the lower threshold value Uu. It has proven to be advantageous that the first setpoint period, in which the voltage curve is greater than an upper threshold Uo, 8ms and the second period in which the voltage curve is below the lower threshold Uu, lms.
- the voltage drop between the times t1 and t2 or between the times t3 and t4 is due to the discharge of the injector by the power supply unit 21 of the data carrier.
- a predetermined amount of data is respectively read out or stored after the determination as to whether read-out or storage takes place.
- the amount of data that is read out or stored is five-bit packets, with the fifth bit being used as the stop bit to synchronize the data.
- the data synchronization without stop bit based on a stored code, such. of the Manchester code.
- FIG. 4 shows the reading out or storing of one bit each in the time interval between the times t4 and t6 and for the time period between the times t6 and t8.
- the stored or read bit contains only two possible information.
- the value contained in the bit can only assume an O value or a 1 value, whereby the time period required for reading out or storing a single bit can be predetermined.
- a 1 value is recognized by the fact that, at time t5, the voltage value is below the lower voltage level. values lies.
- the time interval between the times t4 and t5 can be predetermined and less than the time between the times t4 and t6, which is available for reading or storing a bit. Starting from the time t6 at which the injector is charged, the voltage value is above the upper voltage value at time t7. As a result, the data carrier recognizes that a 0-bit is to be read out or stored.
- the time interval between the times t6 and t7 corresponds to the time interval between the times t4 and t5.
- the time interval between the times t6 and t7 is again smaller than the time interval between the times t6 and t8, which is available for reading or storing a bit. It has turned out to be advantageous that the period between the times t4 and t5 occupies 80% of the time period between the times t4 and t6.
- FIG. 5 shows a flowchart for reading out a data volume from the data carrier.
- the activator and thus the voltage unit is activated in step Sl, when a certain voltage pattern is measured at the injector.
- the system waits until the voltage curve is above the upper threshold value for a predefinable period of time.
- a counter value is smaller than a stored value.
- the counter value depends on the number of bits read. It is incremented each time a bit is read. By means of the counter value, it can be recognized below when a stop bit is sent for synchronization. This takes place as soon as the counter value is greater than a stored value. In this case, a stop bit for synchronizing the data amount is read out in step S4 'and the counter value is reset to an initial value.
- step S4 If the counter value is smaller than the stored value, it is checked in step S4 whether the voltage profile is below the predetermined upper threshold value. If the Voltage curve is greater than the upper threshold, so in step S5 a bit is read out with the associated O value, otherwise in step S5 'a bit is read out with the associated 1 value. Finally, in step S7, the counter value from step S4 is increased by one value.
- FIG. 6 shows a flow chart for storing a data volume in the data carrier.
- the activator and thus the power supply unit is activated in step S10.
- step S20 it is waited until the voltage curve is above the upper threshold value for a predefinable time period.
- step S30 it is checked in step S30 whether a counter value is smaller than a stored value.
- the counter value depends on the number of bits read. It is incremented each time a bit is stored. By means of the counter value it can therefore be recognized when a stop bit is sent for synchronization. If the counter value should be greater than the stored value, the system waits in step S40 'until the measured voltage curve has fallen below the predefinable lower threshold value. Further, in step S400, the counter value is reset to its starting point.
- step S40 If the counter value is smaller than the stored value, it is waited in step S40 for a predeterminable period of time until it is checked in step S50 whether the measured voltage profile has dropped below the upper threshold value.
- step S60 If the voltage curve has dropped below the upper threshold value, a bit with assigned 1 value is stored in the data carrier in step S60. If, however, the measured voltage curve does not fall below the upper threshold value, a bit with the assigned 0 value is stored in the data carrier in step S60. Finally, in step S80, the counter value is increased from step S30.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007020061A DE102007020061B3 (de) | 2007-04-27 | 2007-04-27 | Verfahren und Datenträger zum Auslesen und/oder Speichern von injektorspezifischen Daten zur Steuerung eines Einspritzsystems einer Brennkraftmaschine |
| PCT/EP2008/054703 WO2008132068A1 (de) | 2007-04-27 | 2008-04-18 | Verfahren und datenträger zum auslesen und/ oder speichern von injektorspezifischen daten zur steuerung eines einspritzsystems einer brennkraftmaschine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2140125A1 true EP2140125A1 (de) | 2010-01-06 |
| EP2140125B1 EP2140125B1 (de) | 2016-01-13 |
Family
ID=39567843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08736353.7A Not-in-force EP2140125B1 (de) | 2007-04-27 | 2008-04-18 | Verfahren und datenträger zum auslesen und/ oder speichern von injektorspezifischen daten zur steuerung eines einspritzsystems einer brennkraftmaschine |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US8649960B2 (de) |
| EP (1) | EP2140125B1 (de) |
| JP (1) | JP5145410B2 (de) |
| CN (1) | CN101668936A (de) |
| DE (1) | DE102007020061B3 (de) |
| WO (1) | WO2008132068A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2325465A1 (de) * | 2009-11-24 | 2011-05-25 | Delphi Technologies Holding S.à.r.l. | Kraftstoffeinspritzdüsen-Kommunikationssystem |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US745645A (en) * | 1903-06-22 | 1903-12-01 | William O Mundy | Street-car window. |
| JPH09139094A (ja) * | 1995-11-13 | 1997-05-27 | Denso Corp | 電子装置,メモリ書換装置及び電子装置のメモリ書換システム |
| US6234002B1 (en) * | 1997-09-05 | 2001-05-22 | David W. Sisney | Apparatus and methods for cleaning and testing fuel injectors |
| JP3855473B2 (ja) * | 1998-07-08 | 2006-12-13 | いすゞ自動車株式会社 | コモンレール式燃料噴射装置 |
| JP3487207B2 (ja) | 1999-02-01 | 2004-01-13 | 株式会社デンソー | 燃料噴射システム |
| US6516658B1 (en) | 1999-04-16 | 2003-02-11 | Siemens Vdo Automotive Corporation | Identification of diesel engine injector characteristics |
| DE10007691B4 (de) * | 2000-02-19 | 2006-10-26 | Robert Bosch Gmbh | Verfahren und Vorrichtung zum Speichern und/oder Auslesen von Daten eines Kraftstoffzumesssystems |
| JP4433640B2 (ja) * | 2001-06-28 | 2010-03-17 | 株式会社デンソー | アクチュエータ搭載機器の制御装置およびその調整方法 |
| DE10117809A1 (de) * | 2001-04-10 | 2002-10-17 | Bosch Gmbh Robert | System und Verfahren zum Erfassen von Informationen |
| CN100350326C (zh) * | 2001-08-31 | 2007-11-21 | 佳能株式会社 | 模板、投影曝光设备、器件制造方法及测量方法 |
| DE10244091A1 (de) * | 2002-09-23 | 2004-04-01 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Steuerung einer Brennkraftmaschine |
| DE10340137A1 (de) * | 2003-09-01 | 2005-04-07 | Robert Bosch Gmbh | Verfahren zur Bestimmung der Ansteuerspannung eines piezoelektrischen Aktors eines Einspritzventils |
| ITTO20030940A1 (it) * | 2003-11-25 | 2005-05-26 | Fiat Ricerche | Dispositivo di comando di elettroiniettori di un impianto di iniezione del combustibile a collettore comune per un motore a combustione interna. |
| DE102005001425A1 (de) * | 2005-01-12 | 2006-07-20 | Robert Bosch Gmbh | Vorrichtung zur Steuerung einer Brennkraftmaschine |
| DE102005050567A1 (de) * | 2005-10-21 | 2007-04-26 | Robert Bosch Gmbh | Brennstoffeinspritzventil und Verfahren zur Identifikation von Brennstoffeinspritzventilen |
| DE102006013166A1 (de) * | 2006-03-22 | 2007-09-27 | Robert Bosch Gmbh | Verfahren zur Bestimmung einer Öffnungsspannung eines piezoelektrischen Injektors |
| DE102006029083B3 (de) * | 2006-06-24 | 2007-04-19 | Mtu Friedrichshafen Gmbh | Einrichtung zur Steuerung einer Brennkraftmaschine |
| JP2008057413A (ja) * | 2006-08-31 | 2008-03-13 | Hitachi Ltd | 車両の特性記憶装置及び方法 |
-
2007
- 2007-04-27 DE DE102007020061A patent/DE102007020061B3/de not_active Expired - Fee Related
-
2008
- 2008-04-18 CN CN200880013824A patent/CN101668936A/zh active Pending
- 2008-04-18 US US12/597,150 patent/US8649960B2/en not_active Expired - Fee Related
- 2008-04-18 JP JP2010504644A patent/JP5145410B2/ja not_active Expired - Fee Related
- 2008-04-18 WO PCT/EP2008/054703 patent/WO2008132068A1/de not_active Ceased
- 2008-04-18 EP EP08736353.7A patent/EP2140125B1/de not_active Not-in-force
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008132068A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5145410B2 (ja) | 2013-02-20 |
| WO2008132068A1 (de) | 2008-11-06 |
| DE102007020061B3 (de) | 2008-10-16 |
| JP2010525230A (ja) | 2010-07-22 |
| CN101668936A (zh) | 2010-03-10 |
| US8649960B2 (en) | 2014-02-11 |
| EP2140125B1 (de) | 2016-01-13 |
| US20100138137A1 (en) | 2010-06-03 |
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