EP1567758A1 - Verfahren und vorrichtung zum betrieb eines einspritzsystems einer brennkraftmaschine - Google Patents
Verfahren und vorrichtung zum betrieb eines einspritzsystems einer brennkraftmaschineInfo
- Publication number
- EP1567758A1 EP1567758A1 EP03767399A EP03767399A EP1567758A1 EP 1567758 A1 EP1567758 A1 EP 1567758A1 EP 03767399 A EP03767399 A EP 03767399A EP 03767399 A EP03767399 A EP 03767399A EP 1567758 A1 EP1567758 A1 EP 1567758A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- injection
- pulse
- state variable
- injection system
- actuator
- 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
- 238000002347 injection Methods 0.000 title claims abstract description 138
- 239000007924 injection Substances 0.000 title claims abstract description 138
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000001514 detection method Methods 0.000 claims description 9
- 230000004913 activation Effects 0.000 claims description 8
- 238000010586 diagram Methods 0.000 claims description 4
- 239000000446 fuel Substances 0.000 abstract description 18
- 230000001960 triggered effect Effects 0.000 abstract description 5
- 230000002045 lasting effect Effects 0.000 abstract 1
- 230000006978 adaptation Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000013213 extrapolation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 238000000926 separation method Methods 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
- F02D41/24—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
- F02D41/247—Behaviour for small quantities
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
- F02D35/027—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions using knock sensors
-
- 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
- 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
- F02D41/2438—Active learning methods
-
- 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
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
- F02D35/021—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions using an ionic current sensor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
- F02D35/023—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure
-
- 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
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/12—Introducing corrections for particular operating conditions for deceleration
- F02D41/123—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off
Definitions
- the invention relates to a method and a device for operating an injection system of a Brenri xaft machine according to the preambles of the respective independent claims.
- a high-pressure injection system affected here and an injection valve (injector) equipped with a piezo actuator as an injection actuator can be found in DE 100 32 022 AI and DE 100 02 270 Cl.
- Such an injection valve is used for finely adjustable fuel metering in the combustion chamber of the internal combustion engine.
- the piezo actuator serves to control the movement of a nozzle needle of the injection valve, wherein either the nozzle needle itself or a control valve controlling the movement of the nozzle needle is activated.
- the pulse-shaped control voltage of these piezo actuators required for a specific injection quantity is known to be dependent on state variables of the injection system, such as, for example, the rail pressure currently prevailing in a common rail or the temperature of the piezo actuator.
- a corresponding adaptation of the control voltage must therefore take place to enable the smallest injection quantities.
- the above-mentioned dependence on the rail pressure results from the above-mentioned mode of operation of the injection valve and the above-mentioned temperature dependency from the stroke of the piezo actuator which varies with the temperature.
- the effect on the injection quantity results from the different real triggering start or the triggering end with varying actuator stroke or varying hydraulic and mechanical operating parameters.
- DE 39 29 747 AI also discloses a method for controlling a fuel injection system with a high-pressure fuel pump, the amount of fuel to be injected into the respective combustion chambers of the internal combustion engine being controlled by means of solenoid valves.
- Manufacturing and age-related variations in the amount of fuel injected into the individual combustion chambers mean that different amounts of fuel are supplied with the same control signal Particularly in the case of very small quantities injected in pre-injections, this leads to considerable quantity errors.
- the pulse duration of the control pulses of the solenoid valve, in which a pre-injection is just starting is determined in certain operating states of the internal combustion engine. Based on the duration of the control pulses determined in this way, adjustment signals for the control pulses are formed and stored permanently.
- the present invention is based on the object of improving a method and a device of the type mentioned at the outset such that by adapting the control voltage of injection actuators, for example piezo actuators, of an injection system, the quantity accuracy of metered fuel, in particular also when the internal combustion engine is operating or of an underlying motor vehicle is increased.
- injection actuators for example piezo actuators
- an injection system for example a common rail or a pump-nozzle injection system of an internal combustion engine with at least one injection actuator which can be controlled by means of control pulses, the activation of the injection actuator being dependent on at least one state variable of the injection system, the at least first recorded a state variable and buffered it.
- at least one of the injection actuators is actuated with a trigger pulse of predeterminable pulse duration and predeterminable output pulse height, and an injection detection is carried out during this.
- the pulse height of the control pulse is incremented in predeterminable steps for the specified pulse duration until an injection is recognized.
- the pulse height of the control pulse causing the injection is permanently stored as a function of the detected state variable and is used as a basis for the future operation of the injection system when the at least one injection actuator is activated.
- the advantage of the method according to the invention over the prior art is that the drive voltage required for each individual injection actuator or injector under the respective operating condition of the injection system, for example the rail pressure currently prevailing and the temperature of the injection actuator or injector, during operation of the internal combustion engine or the underlying motor vehicle is adapted to the current operating state.
- the state variable of the injection system also includes operating variables of the injection actuator itself, which result, in particular, from sample variations during its manufacture.
- the invention is based in particular on the effect known per se that a minimum, rail-pressure-dependent control voltage is required in the injection valves or injection actuators concerned here in order to implement an effective injection. If, however, a lower voltage is applied to the injection actuator, the force generated is not sufficient to open the control valve against the rail pressure.
- the invention is also based on the knowledge that, with a successive increase in the control voltage, an injection starts immediately as soon as the control voltage is sufficiently high. That there is a sharp separation with regard to the system reaction with regard to a drive voltage which is too small / insufficient.
- the proposed method takes advantage of this property, in that the values of the control voltage U_erf adapted during operation of the internal combustion engine are used with great precision, characteristic curve (s), characteristic diagrams or tables, in particular the value pairs U_erf (p_rail) and / or U_erf (T_Aktor) to determine under real operating conditions.
- control voltage can be adapted to changing operating conditions of the internal combustion engine, in particular changing state variables of the injection system, without additional sensory effort, which results in a fuel metering that is even more precise than in the prior art.
- the method enables a specific adaptation of the respective electrical control voltage for the metering of fuel for each injection valve or injector and for each combustion chamber of the internal combustion engine.
- the invention further relates to a device, in particular for executing the aforementioned method, which has first means for detecting the at least one state variable and for temporarily storing a state variable which has been approximately detected, second means for controlling the at least one injection actuator with a trigger pulse of predeterminable pulse duration and predeterminable output pulse height, third means for Execution of an injection detection when the at least one injection actuator is activated, fourth means for incrementing the pulse height of the activation pulse in predeterminable steps for the predetermined pulse duration, and fifth means for permanent storage of the pulse height of the activation pulse causing the injection as a function of the detected state variable in the event of a detected injection having.
- Fig. 1 is a simplified block diagram of an injection system according to the
- Fig. 2 is a schematic, partial representation of a in the prior
- FIG. 3 is a block diagram of a device for operating a common rail
- FIG. 4 exemplary control pulses to illustrate the control of a
- FIG. 5 shows a preferred exemplary embodiment of the procedure according to the invention for controlling an injection actuator using a flowchart.
- Fig. 1 shows the basic structure of a fuel injection system of a self-igniting internal combustion engine according to the prior art (DE 39 29 747 AI).
- the internal combustion engine 10 shown only schematically here, receives a certain amount of fuel from an injection unit 30.
- the current operating state of the internal combustion engine 10 is detected by means of sensors 40 and the measured values 15 thus acquired are transmitted to a control unit 20.
- These measured values include, for example, the rotational speed and the temperature of the internal combustion engine and the actual start of injection and possibly other variables 25 which characterize the operating state of the internal combustion engine, such as the position of an accelerator pedal 25 or the ambient air pressure.
- the control unit 20 uses the measured values 15 and the further variables 25 to calculate control pulses 35, which are applied to a quantity-determining element of the injection unit 30, in accordance with the quantity of fuel desired by the driver.
- a solenoid valve serves as a quantity-determining element, which is arranged in such a way that the fuel quantity to be injected is determined by the opening duration or the closing duration of the solenoid valve.
- solenoid valves instead of solenoid valves, other electrically controllable injection valves with, for example, piezo actuators can also be arranged. This does not affect the procedure described below.
- FIG. 2 shows a piezoelectric controllable injection valve 101 known in the prior art (DE 100 02 270 Cl) in a line drawing.
- the valve 101 has a piezoelectric actuator 104 for actuating a valve member 103 which is axially displaceable in a bore 113 of a valve body 107.
- the valve 101 also has an actuating piston 109 adjoining the piezoelectric actuator 104 and an actuating piston 114 adjoining a valve closing member 115.
- a hydraulic chamber 116 operating as a hydraulic transmission is arranged between the pistons 109, 114.
- the valve closing member 115 interacts with at least one valve seat 118, 119 and separates a low-pressure area 120 from a high-pressure area 121.
- An electrical control unit 112 which is only indicated schematically, supplies the control voltage for the piezoelectric actuator 104 depending on, in particular, the pressure level in the high-pressure area 121.
- the device shown in FIG. 3 for operating a common rail injection system of an internal combustion engine comprises a so-called release module 200, which in the exemplary embodiment can be activated by means of a push bit 205 provided by a control unit (not shown).
- a release module 200 which in the exemplary embodiment can be activated by means of a push bit 205 provided by a control unit (not shown).
- a control unit not shown.
- Possible further input variables of the release module are the current rail pressure and / or the current temperature of the piezo actuator.
- a rail pressure detection 210 is also arranged, the operation of which is triggered by the release module 200.
- a function module 215 for triggering the injection actuators according to the invention and subsequently adapting the trigger signals is also triggered accordingly.
- a further input signal 220 of the last-mentioned function module 215 is provided in the present exemplary embodiment by a speed signal evaluation module 225, which carries out an injection detection on the basis of a speed signal provided by the control unit.
- Typical drive voltage pulses are shown in FIG. 4 to illustrate the gradual increase in the drive voltage with a constant drive duration.
- the first voltage pulse 400 differs from the second voltage pulse 405 only in the voltage increment ⁇ U1 shown, the mean pulse duration ⁇ tl shown corresponding for both voltage pulses.
- the system reaction ie the success of an injection into the combustion chamber of the internal combustion engine assigned to the controlled injector, is monitored 525. In the present exemplary embodiment, this is done by means of the already mentioned speed signal evaluation module 225. If an injection is recognized, the the control voltage U_erf, which is the cause, is permanently stored 530 together with the currently present value of the rail pressure. However, in the event that no injection is detected the control voltage is incremented 535 step by step and thereafter the speed signal is monitored until a torque-generating and thus speed-increasing injection is recognized 525. The control voltage U_erf, which is then the basis, is accordingly stored 530 together with the rail pressure value.
- the procedure shown in FIG. 5 is carried out at different rail pressures and thereby enables the detection of a characteristic curve U_erf (p_Rail).
- U_erf characteristic curve U_erf
- the fineness of the above-mentioned increments of the control voltage essentially determines the achievable spread of the determined characteristic values and thus ultimately the maximum achievable precision in fuel metering.
- the values of the control voltage determined in this way each represent minimum voltages which, at the current rail pressure, lead to an actuator movement and thus to an indirectly measurable injection.
- the previously described procedure can also be applied to all combustion chambers (cylinders) of the internal combustion engine. It may be necessary to regulate the rail pressure in overrun mode to a value that deviates from the rail pressure that is usually present at the operating point of the internal combustion engine in question. Accordingly, the attainable rail pressure range will also be limited, so that the adaptation can only be carried out within a limited rail pressure range and an extrapolation must be carried out for the remaining rail pressure range.
- the respectively determined value of the drive voltage is compared with empirically determined target voltage values and a correction value is determined from the difference that may result.
- the ascertained values of the control voltage are filtered in the characteristic curve. If, for example, the rail pressure leaves the currently active pressure range on which the characteristic curve is based, the newly adapted value of the control voltage is filtered with the old voltage value before being stored, in particular weighted with this, which influences the influence of measurement errors when creating the characteristic curve is reduced.
- the aforementioned injection detection takes place indirectly on the basis of operating parameters of the internal combustion engine. However, the operating parameter used as a basis is not important. As described above, a preferred operating parameter is the speed or the value of a speed signal provided by the internal combustion engine or a corresponding engine control unit.
- control device In addition, other variables already present in the control device, such as, for example, the pressure signal provided by a combustion chamber pressure sensor, the knock signal provided by a knock sensor arranged in the combustion chamber, or the ion current signal provided by an ion current sensor can be considered.
- the size of the control duration which is fixedly predetermined in the described method is selected such that a maximum injection quantity is realized at the current rail pressure which is not perceptible to the driver of the underlying vehicle, so that there is no loss of comfort due to the predefined adaptation procedure ,
- the above-described characteristic curve U_erf (p_Rail) is only exemplary and other parameter pairs such as the control voltage, U_erf over the actuator temperature, T_Piezo actuator 'can be used as a basis.
- the above-described injection system with a piezoelectrically controlled injection actuator is understood only as an exemplary embodiment and can also include, for example, magnetically controlled actuators or the like.
Landscapes
- 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)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10254844A DE10254844A1 (de) | 2002-11-25 | 2002-11-25 | Verfahren und Vorrichtung zum Betrieb eines Einspritzsystems einer Brennkraftmaschine |
DE10254844 | 2002-11-25 | ||
PCT/DE2003/003647 WO2004048763A1 (de) | 2002-11-25 | 2003-11-04 | Verfahren und vorrichtung zum betrieb eines einspritzsystems einer brennkraftmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1567758A1 true EP1567758A1 (de) | 2005-08-31 |
EP1567758B1 EP1567758B1 (de) | 2008-02-13 |
Family
ID=32240370
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03767399A Expired - Lifetime EP1567758B1 (de) | 2002-11-25 | 2003-11-04 | Verfahren und vorrichtung zum betrieb eines einspritzsystems einer brennkraftmaschine |
Country Status (6)
Country | Link |
---|---|
US (1) | US7191051B2 (de) |
EP (1) | EP1567758B1 (de) |
JP (1) | JP2006507443A (de) |
CN (1) | CN100379965C (de) |
DE (2) | DE10254844A1 (de) |
WO (1) | WO2004048763A1 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005008179A1 (de) * | 2005-02-23 | 2006-08-31 | Robert Bosch Gmbh | Verfahren zum Betreiben eines Injektors für eine Brennkraftmaschine |
DE102006015967A1 (de) * | 2006-04-05 | 2007-10-18 | Siemens Ag | Adaptionsverfahren einer Einspritzanlage einer Brennkraftmaschine |
DE102006027405B3 (de) * | 2006-06-13 | 2007-12-13 | Siemens Ag | Verfahren zum Betreiben einer Brennkraftmaschine und Brennkraftmaschine |
FR2917463A3 (fr) * | 2007-06-12 | 2008-12-19 | Renault Sas | Procede de reduction des derives et des dispersions des injecteurs d'un moteur |
DE102007034188A1 (de) * | 2007-07-23 | 2009-01-29 | Robert Bosch Gmbh | Verfahren zum Betreiben eines Einspritzventils |
DE102010021168B4 (de) | 2010-05-21 | 2020-06-25 | Continental Automotive Gmbh | Verfahren zum Betreiben einer Brennkraftmaschine und Brennkraftmaschine |
DE102011007359B4 (de) | 2011-04-14 | 2019-08-01 | Robert Bosch Gmbh | Verfahren und Vorrichtung zum Betreiben eines Piezoaktors |
DE102011087961A1 (de) | 2011-12-08 | 2013-06-13 | Robert Bosch Gmbh | Verfahren zum Lernen einer minimalen Ansteuerdauer von Einspritzventilen eines Verbrennungsmotors |
DE102012209965A1 (de) * | 2012-06-14 | 2013-12-19 | Robert Bosch Gmbh | Verfahren zum Betreiben eines Ventils |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4889100A (en) * | 1986-12-19 | 1989-12-26 | Japan Electronic Control Systems Company, Limited | Fuel injection control system for multi-cylinder internal combustion engine with feature of improved response characteristics to acceleration enrichment demand |
DE3929747A1 (de) | 1989-09-07 | 1991-03-14 | Bosch Gmbh Robert | Verfahren und einrichtung zum steuern der kraftstoffeinspritzung |
US5546909A (en) * | 1994-12-27 | 1996-08-20 | Ford Motor Company | Method and system for generating a fuel pulse waveform |
US5732381A (en) * | 1996-03-25 | 1998-03-24 | Ford Motor Company | Method and system for generating a fuel pulse waveform |
US5638798A (en) * | 1996-03-25 | 1997-06-17 | Ford Motor Company | Method and system for generating ignition coil control pulses |
US6076503A (en) * | 1996-12-13 | 2000-06-20 | Tecumseh Products Company | Electronically controlled carburetor |
DE19905340C2 (de) * | 1999-02-09 | 2001-09-13 | Siemens Ag | Verfahren und Anordnung zur Voreinstellung und dynamischen Nachführung piezoelektrischer Aktoren |
DE10002270C1 (de) | 2000-01-20 | 2001-06-28 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten |
EP1138919B1 (de) * | 2000-04-01 | 2005-04-06 | Robert Bosch GmbH | Brennstoffeinspritzanlage |
DE10032022B4 (de) | 2000-07-01 | 2009-12-24 | Robert Bosch Gmbh | Verfahren zur Bestimmung der Ansteuerspannung für ein Einspritzentil mit einem piezoelektrischen Aktor |
-
2002
- 2002-11-25 DE DE10254844A patent/DE10254844A1/de not_active Withdrawn
-
2003
- 2003-11-04 JP JP2004554192A patent/JP2006507443A/ja active Pending
- 2003-11-04 US US10/535,643 patent/US7191051B2/en not_active Expired - Fee Related
- 2003-11-04 WO PCT/DE2003/003647 patent/WO2004048763A1/de active IP Right Grant
- 2003-11-04 DE DE50309176T patent/DE50309176D1/de not_active Expired - Lifetime
- 2003-11-04 EP EP03767399A patent/EP1567758B1/de not_active Expired - Lifetime
- 2003-11-04 CN CNB200380100369XA patent/CN100379965C/zh not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2004048763A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN1692219A (zh) | 2005-11-02 |
JP2006507443A (ja) | 2006-03-02 |
US20060129302A1 (en) | 2006-06-15 |
DE50309176D1 (de) | 2008-03-27 |
DE10254844A1 (de) | 2004-06-03 |
US7191051B2 (en) | 2007-03-13 |
CN100379965C (zh) | 2008-04-09 |
WO2004048763A1 (de) | 2004-06-10 |
EP1567758B1 (de) | 2008-02-13 |
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