EP2313670A1 - Method for operating a hydraulic or pneumatic control device of a semi-automatic transmission - Google Patents
Method for operating a hydraulic or pneumatic control device of a semi-automatic transmissionInfo
- Publication number
- EP2313670A1 EP2313670A1 EP09780348A EP09780348A EP2313670A1 EP 2313670 A1 EP2313670 A1 EP 2313670A1 EP 09780348 A EP09780348 A EP 09780348A EP 09780348 A EP09780348 A EP 09780348A EP 2313670 A1 EP2313670 A1 EP 2313670A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- main switching
- switching valves
- control
- measured
- 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.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/005—Fault detection or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/2807—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted using electric control signals for shift actuators, e.g. electro-hydraulic control therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/3056—Assemblies of multiple valves
- F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
- F15B2211/3057—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve having two valves, one for each port of a double-acting output member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/32—Directional control characterised by the type of actuation
- F15B2211/327—Directional control characterised by the type of actuation electrically or electronically
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40576—Assemblies of multiple valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
- F15B2211/41509—Flow control characterised by the connections of the flow control means in the circuit being connected to a pressure source and a directional control valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/42—Flow control characterised by the type of actuation
- F15B2211/426—Flow control characterised by the type of actuation electrically or electronically
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/63—Electronic controllers
- F15B2211/6303—Electronic controllers using input signals
- F15B2211/6306—Electronic controllers using input signals representing a pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/63—Electronic controllers
- F15B2211/6303—Electronic controllers using input signals
- F15B2211/6336—Electronic controllers using input signals representing a state of the output member, e.g. position, speed or acceleration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/855—Testing of fluid pressure systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/68—Inputs being a function of gearing status
- F16H2059/683—Sensing pressure in control systems or in fluid controlled devices, e.g. by pressure sensors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
- F16H2061/1208—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures with diagnostic check cycles; Monitoring of failures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
- F16H2061/122—Avoiding failures by using redundant parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
- F16H2061/1256—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures characterised by the parts or units where malfunctioning was assumed or detected
- F16H2061/126—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures characterised by the parts or units where malfunctioning was assumed or detected the failing part is the controller
- F16H2061/1264—Hydraulic parts of the controller, e.g. a sticking valve or clogged channel
Definitions
- the invention relates to a method for operating a hydraulic or pneumatic control device of an automated manual transmission according to the preamble of claim 1.
- the hydraulic or pneumatic control device 1 of an automated manual transmission of a motor vehicle, shown in FIG. 1, is known.
- the control device 1 shown in Fig. 1 comprises a driven by a motor 2 pump 3 to pressure medium, such. B. hydraulic oil or compressed air via a suction line 4 and a check valve 5 from a reservoir 6 and an oil sump 7 in a main pressure line 8 to promote.
- a pressure accumulator 9 is connected to the main pressure line 8.
- the control device of FIG. 1 has a plurality of adjusting devices, of which only two adjusting devices 13 and 14 are shown.
- the adjusting devices 13 and 14 which may be selector dividers and switching dividers or just switching dividers, are each in the form of actuating cylinders 15, 16, each having two pressure chambers 19a, 19b and 20a, 20b separated by a piston 17, 18 having.
- the pressure chambers 19a, 19b of the first actuating device 13 are in each case connected via a connecting line 21a, 21b to the output of a control valve 22a, 22b designed as a 3/2-way magnetic switching valve.
- the control valve 22a the first pressure chamber 19a of the adjusting device 13 is selectively connectable via a return line 23a and a check valve 24a to the pressure-free line 12 or via an inflow line 25a to a pressure line 26.
- the second pressure chamber 19b of the steepening device 13 through the associated control valve 22b selectively connectable via a return flow line 23b and a check valve 24b to the pressure-free line 12 or via an inflow line 25b to the pressure line 26.
- the pressure chambers 20a and 20b of the adjusting device 14 are in each case connected via a connecting line 31a, 31b to the output of a control valve 32a, 32b designed as a 3/2-way magnetic switching valve.
- the associated first control valve 32a of the first pressure chamber 20a of the actuator 14 is selectively connectable via a return line 33a and a check valve 34a with the pressure-free line 12 or via an inflow line 35a to the pressure line 26.
- the second pressure chamber 20b of the adjusting device 14 through the associated second control valve 32b selectively connectable via a return flow line 33b and a check valve 34b with the pressure-free line 12 or via an inflow line 35b to the pressure line 26.
- an accumulator 27 is connected to the pressure line 26. Further, a pressure sensor 28 is connected to the pressure line 26, the z. B. for measuring the actuation pressures in the pressure chambers 19a, 19b, 20a, 20b of the adjusting devices 13, 14 can be used.
- a preferably electronically designed control unit 29 is connected via electrical control lines 3oA 1 30b, 40a, 40b with the control valves 21a, 21b, 31a, 31b of the adjusting devices associated, via a further electrical control line 36 is the control unit 29 to the motor 2 and a sensor line 37 with the pressure sensor 28 in conjunction.
- control device 1 of FIG. 1 has a plurality of, namely in the exemplary embodiment shown, two main switching valves 45a and 45b connected in parallel, which are connected between the main pressure line 8 and the pressure line 26.
- the main switching valves 45a and 45b are each designed as 2/2-way magnetic switching valves according to FIG. 1, and are in each case connected via an electrical control line 46a, 46b to the control unit 29, so that they can be controlled independently of one another.
- a functional check of the main switching valves 45a, 45b is to be carried out on the control device 1 of FIG. 1, this is done as usual in practice by actuating the main switching valves 45a, 45b via the electronic control unit 29, so as to generate an electrical or electronic Diagnosis and functional testing of the main switching valves 45a and 45b to realize.
- Such a diagnosis of the main switching valves 45a and 45b can not be made during the regular operation of the control device 1. There is therefore a need for a method for operating such a control device, in which a diagnosis or functional testing of the main switching valves 45a and 45b is also possible during the regular operation of the control device.
- the present invention is based on the problem to provide a novel method for operating a hydraulic or pneumatic control device of an automated manual transmission.
- At least one measuring signal is detected with the aid of the or each sensor depending on the activation of the main switching valves, wherein the or each detected measuring signal is compared with a stored for the respective control of the main switching valves Soilsignal, and wherein if a deviation between a measurement signal and the respective reference signal is determined, a defect is closed at least one of the main switching valves.
- the diagnosis or functional testing of the main switching valves takes place indirectly by evaluating measuring signals of at least one sensor of the control device 1.
- Fig. 1 is a schematic representation of a hydraulic or pneumatic control device of an automated manual transmission to illustrate the method according to the invention.
- At least one measuring signal is detected by the actuation of the main switching valves 45a, 45b, wherein the or each detected measuring signal is compared with a setpoint signal stored for the respective actuation of the main switching valves 45a, 45b, and wherein if a deviation between a measuring signal and the respective setpoint signal is determined, a defect of at least one main switching valve 45a, 45b is closed.
- a defect of at least one of the main switching valves 45a, 45b is closed according to the invention.
- this indirect diagnosis or functional check of the main switching valves 45a, 45b can also take place by evaluation of measuring signals of the displacement sensors 10, 11.
- a travel of the respective inclined cylinder 15, 16 is measured with the aid of the displacement sensors 10, 11, the measured travel paths being compared with reference travel paths stored for the respective actuation of the main switching valves 45a, 45b. and wherein, when a deviation between the measured travel paths and the solo travel paths is determined, a defect of at least one of the main switching valves 45a, 45b is closed.
- Table 2 shows that by way of example for a defective or non-controllable, permanently open mainshaft valve 45b, with deviations from the desired state (Table 1) being highlighted for two functional mainshift valves 45a, 45b by underlining.
- control unit 30a 30b control line 31a, 31b connecting line 32a, 32b control valve 33a, 33b return flow line 34a, 34b check valve 35a, 35b inflow line 36 control line 37 sensor line 40a, 40b control line 45a, 45b main switching valve 46a, 46b control line
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008041399A DE102008041399A1 (en) | 2008-08-20 | 2008-08-20 | Method for operating a hydraulic or pneumatic control device of an automated manual transmission |
PCT/EP2009/058713 WO2010020471A1 (en) | 2008-08-20 | 2009-07-09 | Method for operating a hydraulic or pneumatic control device of a semi-automatic transmission |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2313670A1 true EP2313670A1 (en) | 2011-04-27 |
Family
ID=41128204
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09780348A Withdrawn EP2313670A1 (en) | 2008-08-20 | 2009-07-09 | Method for operating a hydraulic or pneumatic control device of a semi-automatic transmission |
Country Status (4)
Country | Link |
---|---|
US (1) | US20110137515A1 (en) |
EP (1) | EP2313670A1 (en) |
DE (1) | DE102008041399A1 (en) |
WO (1) | WO2010020471A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010028762A1 (en) * | 2010-05-07 | 2011-11-10 | Zf Friedrichshafen Ag | Device for determining an operating state of at least one bidirectionally actuable hydraulic adjusting device of a switching element of a transmission device |
FR2975743B1 (en) * | 2011-05-25 | 2013-06-28 | Peugeot Citroen Automobiles Sa | DEVICE FOR HYDRAULIC CONTROL OF A GEAR BOX, METHOD AND BOX OF ASSOCIATED SPEEDS |
DE102014202558A1 (en) * | 2014-02-12 | 2015-08-13 | Valmet Technologies, Inc. | DIGITAL HYDRAULIC PRESSURE REGULATOR AND METHOD OF CHECKING A DIGITAL HYDRAULIC PRESSURE REGULATOR |
WO2016046314A1 (en) * | 2014-09-24 | 2016-03-31 | Caterpillar Sarl | Control valve diagnostic system in hydraulic circuit |
JP6497739B2 (en) * | 2014-09-24 | 2019-04-10 | キャタピラー エス エー アール エル | Fault diagnosis system for control valve in hydraulic circuit |
JP6497738B2 (en) * | 2015-06-25 | 2019-04-10 | キャタピラー エス エー アール エル | Fault diagnosis system for control valve in hydraulic circuit |
DE102021211938B3 (en) | 2021-10-22 | 2022-11-10 | Festo Se & Co. Kg | valve assembly |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3702575A (en) * | 1971-06-01 | 1972-11-14 | Nasa | Redundant hydraulic control system for actuators |
JPS5842699Y2 (en) * | 1977-11-10 | 1983-09-27 | 株式会社小松製作所 | Dual valve failure detection device |
US5167311A (en) * | 1989-09-26 | 1992-12-01 | Zexel Corporation | Transmission control system with gear shift failure detection |
EP0982503B1 (en) * | 1998-08-24 | 2005-09-14 | Industria de Turbo Propulsores S.A. | Servo-actuated piston with self-contained hydromechanical detection |
DE19931973A1 (en) * | 1999-07-09 | 2001-01-11 | Wabco Gmbh & Co Ohg | Device for controlling an actuator for a transmission |
GB9921428D0 (en) * | 1999-09-11 | 1999-11-10 | Luk Getriebe Systeme Gmbh | Automated transmission systems |
DE10131853A1 (en) * | 2001-06-30 | 2003-01-23 | Wabco Gmbh & Co Ohg | Method for determining the actuating pressure of a pressure actuated actuating cylinder |
DE10249341A1 (en) * | 2002-10-23 | 2004-05-06 | Zf Friedrichshafen Ag | Hydraulic or pneumatic pressure regulation system forming part of the transmission system in truck or bus has pulse-width operated electro-magnetic valve |
DE102004006683A1 (en) * | 2004-02-11 | 2005-09-01 | Zf Friedrichshafen Ag | switching unit |
DE102004020437A1 (en) * | 2004-04-27 | 2005-12-01 | Daimlerchrysler Ag | Device for actuating a switching means |
US20050284525A1 (en) * | 2004-06-25 | 2005-12-29 | Schnell Richard E | Manually-operated piloted control-reliable lockout valve |
JP4534652B2 (en) * | 2004-08-03 | 2010-09-01 | 株式会社デンソー | Hydraulic control device for automatic transmission |
DE102004056407A1 (en) * | 2004-11-23 | 2006-05-24 | Zf Friedrichshafen Ag | Switching unit for an automatic transmission |
DE102005012259A1 (en) * | 2005-03-17 | 2006-09-28 | Zf Friedrichshafen Ag | Device for pressure measurement for a hydraulic or pneumatic control device in an automatic transmission or an automated transmission |
DE102006030034A1 (en) * | 2006-06-29 | 2008-01-03 | Zf Friedrichshafen Ag | Device for controlling a fluid-operated double-acting adjusting cylinder |
DE102006040476A1 (en) * | 2006-08-29 | 2008-03-06 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Hydraulic or pneumatic control device of an automated manual transmission |
DE102006054032A1 (en) * | 2006-11-16 | 2008-05-21 | Zf Friedrichshafen Ag | Control device for a transmission and method for controlling a transmission |
-
2008
- 2008-08-20 DE DE102008041399A patent/DE102008041399A1/en not_active Withdrawn
-
2009
- 2009-07-09 WO PCT/EP2009/058713 patent/WO2010020471A1/en active Application Filing
- 2009-07-09 EP EP09780348A patent/EP2313670A1/en not_active Withdrawn
- 2009-07-09 US US13/058,555 patent/US20110137515A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2010020471A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2010020471A1 (en) | 2010-02-25 |
US20110137515A1 (en) | 2011-06-09 |
DE102008041399A1 (en) | 2010-02-25 |
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