EP1673528A1 - Verfahren und vorrichtung zum ermitteln einer phasenlage einer nockenwelle einer brennkraftmaschine - Google Patents
Verfahren und vorrichtung zum ermitteln einer phasenlage einer nockenwelle einer brennkraftmaschineInfo
- Publication number
- EP1673528A1 EP1673528A1 EP04787225A EP04787225A EP1673528A1 EP 1673528 A1 EP1673528 A1 EP 1673528A1 EP 04787225 A EP04787225 A EP 04787225A EP 04787225 A EP04787225 A EP 04787225A EP 1673528 A1 EP1673528 A1 EP 1673528A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- phase position
- camshaft
- determined
- crankshaft
- filter
- 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
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/022—Chain drive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
-
- 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
- F02D41/009—Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2800/00—Methods of operation using a variable valve timing mechanism
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2820/00—Details on specific features characterising valve gear arrangements
- F01L2820/04—Sensors
- F01L2820/041—Camshafts position or phase 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
- F02D41/0002—Controlling intake air
- F02D2041/001—Controlling intake air for engines with variable valve actuation
-
- 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
- F02D41/14—Introducing closed-loop corrections
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D2041/1413—Controller structures or design
- F02D2041/1422—Variable gain or coefficients
-
- 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
- F02D41/14—Introducing closed-loop corrections
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D2041/1413—Controller structures or design
- F02D2041/1432—Controller structures or design the system including a filter, e.g. a low pass or high pass filter
Definitions
- the invention relates to a method and an apparatus for determining a phase position of a camshaft of an internal combustion engine.
- a known internal combustion engine has a crankshaft which is driven by pistons of the cylinders of the internal combustion engine by means of connecting rods. Furthermore, a camshaft is provided, on which cams are formed for driving gas inlet and gas outlet valves of the internal combustion engine. The camshaft is coupled to the crankshaft by means of a transmitter and is driven by the latter.
- NOX Nitrogen oxide
- Exhaust gas recirculation can be achieved particularly well in the internal combustion engine by a so-called internal exhaust gas recirculation.
- the crankshaft angle range during which both the gas inlet valve opens the inlet to the cylinder and the gas outlet valve opens the outlet to which an exhaust gas duct is led is set in accordance with the desired exhaust gas recirculation rate.
- This crankshaft angle range is often also referred to as valve overlap.
- an internal combustion engine is known with a camshaft, the phase position of which is adjustable to the crankshaft by means of an adjusting device.
- the adjustment device can be controlled hydraulically.
- the object of the invention is to provide a method and a device which enables a precise detection of the phase position between a camshaft and a crankshaft of an internal combustion engine.
- the invention is characterized by a method and a corresponding device for determining a phase position of a camshaft of an internal combustion engine with a crankshaft, a camshaft and an adjusting device, by means of which the phase position of the camshaft relative to the crankshaft can be adjusted.
- a phase position is determined as a function of a detected crankshaft angle and a detected camshaft angle.
- a filter coefficient of a filter becomes dependent on the amplitude of an oscillation of the phase position and the change in the phase position is determined.
- a filtered phase position of the determined phase position is determined using the filter.
- the invention is based on the knowledge that, in particular in internal combustion engines whose camshafts or camshafts act on a few gas exchange valves, such as, for example, in a V6 internal combustion engine with two camshafts, which are each assigned to the gas exchange valves or only the gas inlet valves of three cylinders, the strong
- the filtering is carried out by means of a non-recursive filter of the first order. This has the advantage that filtering is particularly simple.
- the change in the phase position is filtered and the filter coefficient is determined as a function of the filtered change in the phase position.
- the change in the phase position is filtered as a function of the speed and / or an oil temperature. This has the advantage that the speed and / or oil temperature are characteristic of the pumping capacity of a hydraulic pump and thus of a possible dynamic of a hydraulically controlled adjusting device.
- the amplitude of the oscillation of the phase position is filtered and the filter coefficient is determined as a function of the filtered amplitude of the oscillation of the phase position.
- the amplitude is filtered as a function of the speed and / or an oil temperature.
- the reduction in the filter coefficient is limited to a predetermined threshold value within a predetermined time period or within a predetermined crankshaft angle section. In the event of a sudden change from increasing phase position to decreasing phase position or vice versa, this can prevent the filter coefficient from being briefly reduced from a high value to a low value, with the result that the phase position is then heavily filtered, which is undesirable in the case of such a transient course of the phase position is.
- the filtering is carried out by means of a non-recursive filter of order two or higher. This enables an even more precise filtering of the phase position.
- FIG. 1 shows an internal combustion engine with a control device
- FIG. 2 shows a further view of parts of the internal combustion engine
- FIGS. 1 and 2 show a flowchart of a program for determining a phase position of a camshaft relative to a crankshaft of the internal combustion engine according to FIGS. 1 and 2, and
- Figure 4 is a flowchart of a program for adjusting the phase position between the camshaft and the crankshaft.
- An internal combustion engine (1) comprises an intake section 1, an engine block 2, a cylinder head 3 and an exhaust tract 4.
- the intake preferably comprises a throttle ⁇ flap 11, also a manifold 12 and a suction pipe 13, which leads to a cylinder Zl is led into the engine block via an inlet duct.
- the engine block further comprises a crankshaft 21 which is coupled to the piston 24 of the cylinder ZI via a connecting rod 25.
- the cylinder head comprises a valve train with an inlet valve 30, an outlet valve 31 and valve drives 32, 33.
- the gas inlet valve 30 and the gas outlet valve 31 are driven by means of a camshaft 36 (see FIG. 2) on which cams 39 are formed act on the gas inlet valve 30 or the gas outlet valve 31, or if necessary, by means of two camshafts, one each being assigned to the gas inlet valve 30 and the gas outlet valve 31.
- the drive for the gas inlet valve 30 and / or the gas outlet valve 31 preferably comprises, in addition to the camshaft 36, an adjusting device 37, which is coupled on the one hand to the camshaft 36 and on the other hand to the crankshaft 21, e.g. B. over sprockets, which are coupled together via a chain.
- an adjusting device 37 which is coupled on the one hand to the camshaft 36 and on the other hand to the crankshaft 21, e.g. B. over sprockets, which are coupled together via a chain.
- Phase position between the crankshaft 21 and the camshaft 36 can be adjusted.
- the arrangement of the sprockets and the chain forms a transformer.
- this is done by increasing the hydraulic pressure in the high-pressure chambers 37a of the adjusting device 37 or lowering the corresponding pressure, depending on the direction in which the adjustment is to take place.
- the possible adjustment range is indicated in FIG. 2 by arrow 37b.
- the adjusting device 37 can, for example, only be assigned to one camshaft 36, while the other camshaft is driven directly by the crankshaft 21 by means of the transmitter.
- the valve overlap of the gas inlet valve 30 and the gas outlet valve 31 can be changed, i.e. the crankshaft angle range during which both an inlet and an outlet of the cylinder are released.
- the valve overlap can also be changed if two camshafts 36 are assigned two separate adjusting devices 37.
- the cylinder head 3 (FIG. 1) further comprises an injection valve 34 and a spark plug 35.
- the injection valve can also be arranged in the intake manifold 13.
- the exhaust tract 4 comprises a catalytic converter 40.
- a control device 6 is provided, to which sensors are assigned, which detect different measured variables and each determine the measured value of the measured variable.
- the control device 6 determines, depending on at least one of the measured variables, manipulated variables which are then converted into one or more actuating signals for controlling the actuators by means of corresponding actuators.
- the sensors are a pedal position sensor 71, which detects the position of an accelerator pedal 7, an air mass meter 14, which detects an air mass flow upstream of the throttle valve 11, a temperature sensor 15, which detects the intake air temperature, a pressure sensor 16, which detects the intake manifold pressure MAP Crankshaft angle sensor 22, which detects a crankshaft angle CRK, to which a rotational speed N is assigned, another temperature sensor 23, which detects a coolant temperature, a camshaft angle sensor 36a, which detects the camshaft angle CAM, another temperature sensor 25, which detects an oil temperature TOIL, and an oxygen probe 41 which detects a residual oxygen content of the exhaust gas.
- any subset of the sensors mentioned or additional sensors can be present.
- the actuators are, for example, the throttle valve 11, the gas inlet and gas outlet valves 30, 31, the injection valve 34, the spark plug 35 and the adjusting device 37
- the internal combustion engine can also comprise further cylinders Z2-Z4, to which corresponding actuators are then also assigned.
- a program for determining the phase position PH between the crankshaft 21 and the camshaft 36 is carried out in one step Sl ( Figure 1) started, in which variables are initialized if necessary.
- the phase position PH is determined depending on the crankshaft angle CRK and the camshaft angle CAM. This is done, for example, by counting tooth flanks of a crankshaft angle encoder of the crankshaft angle sensor 22 based on a reference position on the camshaft 36 and then converting it into the phase position PH.
- an amplitude AMP of an oscillation of the phase position PH is determined.
- An n in brackets means a value recorded or ascertained in the current calculation cycle of the program. Accordingly, an n-1 in brackets means a value determined or recorded in the last calculation cycle of the program.
- PH is determined by forming the amount of the difference between the current phase position PH (n) and the phase position PH (n-1) determined in the previous calculation cycle.
- a filtered amplitude AMP_FIL (n) is determined by filtering the currently determined amplitude AMP (n) with a filter of the first order.
- the first-order filter has a filter coefficient FF1, which is either fixed, but is advantageously determined beforehand in a step S22 depending on the speed N and / or the oil temperature TOIL. This is preferably done by means of a characteristic curve or a map, specifically by means of characteristic curve or map interpolation. The characteristic curve or the characteristic diagram are determined by corresponding tests on an engine test bench or by simulations.
- the current change DELTA (n) of the phase position PH is determined by forming the difference between the current phase position PH (n) and the previous phase position PH (n-1).
- a filtered change DELTA_FIL (n) is determined by means of a filter of the first order by filtering the current change DELTA (n).
- the filter coefficient FF2 of the second filter can be predefined, but is preferably determined in advance in a step S24 depending on the rotational speed N and / or an oil temperature TOIL, and in the same way as in step S22, preferably by means of map or characteristic curve interpolation.
- a step S12 the current filter coefficient FF3 (n) for a further filter is then determined, depending on the filtered amplitude AMP_FIL (n) and the filtered change DELTA_FIL (n) of the phase position PH. This is done before ⁇ preferably by means Kennfeldinterpolation from a map that has been determined in advance by experiments on an engine test bench.
- the map values are preferably selected so that in the cases in which the filtered amplitude AMP_FIL (n) of the oscillation of the phase position is approximately the same, the filtered change DELTA_FIL (n) of the phase position PH are relatively large, for example, have the value 0.7 , On the other hand, if the filtered change DELTA_FIL (n) has almost the value zero and the filtered amplitude AMP_FIL (n) has a significantly larger value than zero, the map values are preferably chosen to be very small, for example with values from 0.1 to 0, second
- a filtered current phase position PH_FIL (n) is then determined by filtering the current phase position PH (n) by means of a first-order filter with the filter coefficient FF3.
- processing is preferably continued in step S14, in which it is checked whether the difference between the filter coefficient FF3 (nl), which was determined in the previous calculation run, and the currently determined filter coefficient FF3 (n) is greater than one predefined threshold value SW. If this is not the case, processing is continued directly in step S18.
- step S14 If, on the other hand, the condition of step S14 is fulfilled, the difference between the filter coefficient FF3 (n-1) and the threshold value SW determined in the previous calculation cycle is assigned to the current filter coefficient FF3 (n) in a step S16. It is thereby achieved that the filter coefficient FF3 changes from one calculation cycle to the next calculation cycle by a maximum of the threshold value SW. Thereby, in the sudden change of increasing phase angle PH to PH decreasing phase position or vice versa ⁇ be prevented that the filter coefficient is set FF3 from a high value to a low value shortly downgrades, resulting in a strong then filtering the
- Phase position PH which is undesirable with such a transient course of the phase position PH.
- step S20 The program remains in a step S20 for a predetermined waiting period I_W before the processing is continued again in step S2.
- the program can also remain in step S20 for a predetermined crankshaft angle before the processing is continued again in step S2.
- the reprocessing of steps S2 to S18 then corresponds to the next calculation cycle.
- a further program is processed in the program according to FIG. 3, which determines an actuating signal S (FIG. 4) for controlling the adjusting device 37.
- the program is started in a step S26, preferably shortly after the start of the internal combustion engine.
- an exhaust gas recirculation rate EGR is determined, specifically as a function of a required torque TQ_REQ, which is to be generated by the internal combustion engine and which is preferably determined as a function of the position of the accelerator pedal and possibly further torque requirements, such as those of an ABS or ESP system becomes.
- the exhaust gas recirculation rate is advantageously also determined as a function of an operating mode MOD of the internal combustion engine, which for example is a
- Shift operation or homogeneous operation of the internal combustion engine can be.
- the exhaust gas recirculation rate EGR can also be determined depending on further operating variables of the internal combustion engine.
- a setpoint PH_SP of the phase position is then determined as a function of the exhaust gas recirculation rate EGR, the intake manifold pressure MAP and as a function of the rotational speed N and, if appropriate, other operating variables.
- the actuating signal S for actuating the adjusting device 37 is then determined as a function of the setpoint PH_SP of the phase position and the filtered phase position PH_FIL (n). This is preferably done by means of a controller which is designed as a P, PI or PID controller.
- step S32 The adjusting device 37 is then controlled with the control signal S.
- step S32 the program then remains in step S34 for the predetermined waiting period T_W.
- the program can also remain in step S34 for a predetermined crankshaft angle before the processing is continued again in step S28.
- the control quality of the controller of step S28 can be increased very strongly and good dynamic behavior and at the same time a high stationary control accuracy can be achieved. This leads to the exhaust gas recirculation rate EGR in the cylinder ZI being able to be set very quickly and precisely, which then contributes decisively to low nitrogen oxide emissions.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10347516A DE10347516B3 (de) | 2003-10-13 | 2003-10-13 | Verfahren und Vorrichtung zum Ermitteln einer Phasenlage einer Nockenwelle einer Brennkraftmaschine |
| PCT/EP2004/052326 WO2005038225A1 (de) | 2003-10-13 | 2004-09-27 | Verfahren und vorrichtung zum ermitteln einer phasenlage einer nockenwelle einer brennkraftmaschine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1673528A1 true EP1673528A1 (de) | 2006-06-28 |
| EP1673528B1 EP1673528B1 (de) | 2011-06-29 |
Family
ID=34441904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04787225A Expired - Lifetime EP1673528B1 (de) | 2003-10-13 | 2004-09-27 | Verfahren und vorrichtung zum ermitteln einer phasenlage einer nockenwelle einer brennkraftmaschine |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US7184880B2 (de) |
| EP (1) | EP1673528B1 (de) |
| DE (1) | DE10347516B3 (de) |
| WO (1) | WO2005038225A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9316126B2 (en) | 2012-08-01 | 2016-04-19 | Robert Bosch Gmbh | Method for determining a phase position of an adjustable camshaft |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005059575B4 (de) | 2005-12-14 | 2022-03-17 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Verbrennungskraftmaschine |
| US7447587B2 (en) * | 2005-12-21 | 2008-11-04 | Honeywell International Inc. | Cylinder to cylinder variation control |
| US7757546B2 (en) * | 2007-12-28 | 2010-07-20 | Gm Global Technology Operations, Inc. | Camshaft and crankshaft position correlation simulation methods and systems |
| DE102014204492A1 (de) | 2014-03-12 | 2015-10-01 | Volkswagen Aktiengesellschaft | Kraftfahrzeug, Steuergerät und Verfahren zum Steuern einer Phasenlage einer Nockenwelle |
| KR101558392B1 (ko) * | 2014-06-09 | 2015-10-07 | 현대자동차 주식회사 | 가변 밸브 타이밍 장치의 제어시스템 |
| US9587525B2 (en) | 2014-10-21 | 2017-03-07 | Ford Global Technologies, Llc | Method and system for variable cam timing device |
| CN118150174B (zh) * | 2024-01-22 | 2025-04-15 | 中国第一汽车股份有限公司 | 测量装置及测量方法 |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2096695A (en) * | 1981-04-13 | 1982-10-20 | Ford Motor Co | Ic engine camshaft drive mechanism |
| US4577598A (en) * | 1982-04-09 | 1986-03-25 | Ford Motor Company | Internal combustion engine and cam drive mechanism therefor |
| US5218935A (en) * | 1992-09-03 | 1993-06-15 | Borg-Warner Automotive Transmission & Engine Components Corporation | VCT system having closed loop control employing spool valve actuated by a stepper motor |
| GB2293894B (en) * | 1994-10-03 | 1998-05-13 | Ford Motor Co | Variable camshaft timing system |
| JP2913273B2 (ja) * | 1996-04-17 | 1999-06-28 | 本田技研工業株式会社 | エンジンの回転検出装置 |
| DE19741597A1 (de) * | 1997-09-20 | 1999-03-25 | Schaeffler Waelzlager Ohg | Nockenpulsrad für eine Brennkraftmaschine mit variabler Nockenwellensteuerung |
| US6101993A (en) * | 1999-02-19 | 2000-08-15 | Ford Global Technologies, Inc. | Variable cam timing control system and method |
| DE10043756C2 (de) * | 2000-09-05 | 2002-11-28 | Siemens Ag | Verfahren zur Festlegung des Einspritzzeitpunkts bei einer Einspritzanlage für eine Brennkraftmaschine |
| JP3988376B2 (ja) | 2000-10-23 | 2007-10-10 | 日産自動車株式会社 | 可変バルブタイミング装置の基準位置学習装置 |
| DE10108055C1 (de) * | 2001-02-20 | 2002-08-08 | Siemens Ag | Verfahren zum Steuern einer Brennkraftmaschine |
| DE10115262C2 (de) * | 2001-03-28 | 2003-04-24 | Bosch Gmbh Robert | Verfahren zur Ermittlung der Drehlage der Nockenwelle einer Verbrennungskraftmaschine |
-
2003
- 2003-10-13 DE DE10347516A patent/DE10347516B3/de not_active Expired - Fee Related
-
2004
- 2004-09-27 US US10/537,239 patent/US7184880B2/en not_active Expired - Fee Related
- 2004-09-27 WO PCT/EP2004/052326 patent/WO2005038225A1/de not_active Ceased
- 2004-09-27 EP EP04787225A patent/EP1673528B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2005038225A1 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9316126B2 (en) | 2012-08-01 | 2016-04-19 | Robert Bosch Gmbh | Method for determining a phase position of an adjustable camshaft |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2005038225A1 (de) | 2005-04-28 |
| US20060136118A1 (en) | 2006-06-22 |
| DE10347516B3 (de) | 2005-06-02 |
| US7184880B2 (en) | 2007-02-27 |
| EP1673528B1 (de) | 2011-06-29 |
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