EP1373700A2 - Verfahren zum reinigen des abgases einer brennkraftmaschine - Google Patents
Verfahren zum reinigen des abgases einer brennkraftmaschineInfo
- Publication number
- EP1373700A2 EP1373700A2 EP02722002A EP02722002A EP1373700A2 EP 1373700 A2 EP1373700 A2 EP 1373700A2 EP 02722002 A EP02722002 A EP 02722002A EP 02722002 A EP02722002 A EP 02722002A EP 1373700 A2 EP1373700 A2 EP 1373700A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- lambda
- signal
- post
- cat
- catalytic converter
- 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
-
- 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
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
- F02D41/1441—Plural 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
- F02D41/1455—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio with sensor resistivity varying with oxygen concentration
-
- 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
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D2041/1468—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an ammonia content or concentration of the exhaust gases
-
- 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
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
- F02D41/1456—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio with sensor output signal being linear or quasi-linear with the concentration of oxygen
-
- 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
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/146—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration
Definitions
- the invention relates to a method for cleaning the exhaust gas of an internal combustion engine operated by means of lambda control with an exhaust tract in which a catalytic converter is arranged, a pre-cat lambda value of the exhaust gas being continuously detected upstream of the catalytic converter, a pre-cat lambda signal being generated , the pre-cat lambda signal is used as the reference variable of the lambda control, a post-cat lambda value of the exhaust gas downstream of the catalytic converter is continuously recorded, a post-cat lambda signal being generated which depends monotonically falling on the lambda value of the exhaust gas downstream of the catalytic converter, and by means of the Post-cat lambda signal in a trim control a correction of the lambda control is carried out.
- a three-way catalytic converter is usually arranged in the exhaust tract of the internal combustion engine in internal combustion engines which operate on the Otto principle.
- a lambda sensor upstream of this catalytic converter, which emits a signal which is dependent on the residual oxygen content contained in the exhaust gas. This residual oxygen content in turn depends on the mixture that was fed to the internal combustion engine. If there is excess fuel (rich mixture or air ratio with lambda ⁇ 1), the proportion of oxygen in the raw exhaust gas is lower, if there is excess air during combustion (lean mixture or air ratio with lambda> 1).
- the lambda probes usually used upstream of the catalytic converter which are also referred to as pre-cat lambda probes due to their position, are so-called binary or jump probes.
- It is characteristic of this two-point behavior of binary lambda probes that, in the area in which the characteristic curve has a steep slope, the signal emitted by the lambda probe is very strongly dependent on the lambda value of the exhaust gas.
- the slope of the characteristic curve then flattens out significantly from a lambda value close to 1.
- Lambda probes are also known which deliver a clear, strictly monotonically increasing signal in a wide lambda range (between approximately 0.7 and 4). These lambda probes are referred to as linear lambda probes or broadband lambda probes.
- each lambda probe The dynamic and static properties of each lambda probe are changed by aging and poisoning of the probe. This shifts the position of the signal level corresponding to ⁇ 0 .
- a further lambda probe downstream of the three-way catalytic converter which, owing to its greater distance from the internal combustion engine, has lower thermal loads and, owing to its location downstream of the catalytic converter, a lower exposure. is exposed to chemically aggressive substances.
- This lambda probe which is also referred to as the post-cat lambda probe due to its location downstream of the catalytic converter, serves as a monitor probe for monitoring the catalytic conversion and enables fine adjustment of the mixture by correcting the ⁇ 0 assigned signal level of the pre-cat lambda probe so that the most favorable lambda value ⁇ o for the conversion can always be maintained on average. This process is known as guidance or trim control.
- trim control method is known in which instead of a post-cat lambda probe signal, the signal of a NO x sensitive sensor arranged downstream of a three-way catalyst is used.
- a similar trim control method using a NO x sensitive sensor is described in DE 198 52 244 Cl.
- the invention is therefore based on the object of specifying a method for purifying the exhaust gas of an internal combustion engine operated in lambda control, in which trim control with a longer service life of the post-cat lambda probe is possible with highly efficient three-way catalysts.
- this measurement signal is relatively low. It only has to be in the area in question, i.e. if the post-cat lambda signal is above the threshold value, allow a more precise statement about the lambda value than the post-cat lambda signal. This implies that there is a clear association between the measurement signal and the lambda value of the exhaust gas downstream of the catalytic converter, which is why the measurement signal must depend on the lambda value in a strictly monotonous increase or decrease.
- the threshold should be such that at levels of the post-cat lambda signal below the threshold value there is sufficient accuracy of the post-cat lambda signal for the trim control. Since the post-cat lambda signal is no longer used above the threshold value for trim control, but rather the measurement signal, it is particularly expedient to select the threshold value such that all signal levels above the threshold value for trim control no longer allow a sufficient resolution of the lambda value , The threshold value thus results from the precision requirements that the trim control places on the post-cat lambda signal and from the measurement accuracy that the post-cat lambda signal can guarantee as a function of the lambda value of the exhaust gas.
- a possible signal that is suitable as a measurement signal in the invention is the output signal of a broadband lambda probe.
- a broadband lambda probe is advantageous because their characteristic curve over a wide lambda range, in particular over which is considered in the trim control of a lambda-controlled internal combustion engine operated with a stoichiometric mixture, has a relatively constant slope. Switching to the measurement signal of the broadband lambda probe when the post-cat lambda probe signal is above the threshold is particularly easy.
- broadband lambda probes have the disadvantage that sometimes the signal level shifts considerably when the probe ages. Such a behavior, which occurs in particular in the case of less expensive broadband lambda probes, has hitherto precluded use as the sole sensor downstream of a three-way catalytic converter in a trim control.
- the post-cat lambda probe signal of the binary post-cat lambda probe reaches the threshold value, then an exhaust gas composition with a certain lambda value is present at this time; the lambda value of the exhaust gas is therefore known at this time.
- the measurement signal of the broadband lambda probe can be ditive errors can be corrected by the preferred further development of the method.
- An error comparison of the measurement signal of the broadband lambda probe takes place at the threshold value.
- a property of NO x sensors can be used in a positive way, which up to now has been perceived as rather annoying and therefore reduced as much as possible.
- the threshold value is 0.45 V (claim 6).
- the object on which the invention is based is achieved in that A linear post-cat lambda signal is generated in the broadband lambda probe, which depends on the lambda value of the exhaust gas downstream of the catalytic converter increasing in a strictly monotonous manner, the linear post-cat lambda signal trimming control is used and, when a certain signal level of the binary post-cat lambda signal is present, an actual signal level at the same time of the linear post-cat lambda signal is determined, a corresponding target signal level of the linear post-cat lambda signal is determined from the lambda value which is assigned to the specific signal level of the binary post-cat lambda signal and a difference between the actual signal level and the target signal level the trim control is taken into account as a correction factor, in particular as an additive factor for offset correction (claim 7).
- the signal of a broadband lambda probe is used continuously for trim control.
- the output signal of a binary post-cat lambda probe is additionally evaluated in order to enable the offset of the post-cat lambda signal used for the trim control to be compared.
- the offset can be adjusted intermittently at certain intervals. These should be selected so that there is no change in the offset between the adjustment times, which could lead to an inadmissible falsification of the trim control.
- 1 is a schematic block diagram of an internal combustion engine with an exhaust gas purification system
- 2 shows the dependency of a post-cat lambda signal of a binary lambda probe and a NO x measurement signal of a NO x sensor on the lambda value
- FIG. 3 shows the dependence of a post-cat lambda signal of a binary lambda probe and of a broadband lambda probe.
- the invention relates to the cleaning of the exhaust gas of an internal combustion engine by means of an exhaust gas cleaning system, as is shown schematically in FIG. 1.
- It can be an internal combustion engine working with a mixture intake or with direct fuel injection.
- the operation of the internal combustion engine 1 of FIG. 1 is controlled by an operating control unit 2.
- a fuel supply system 3, which can be designed as an injection system, for example, is actuated by the operating control device 2 via lines, which are not described in more detail, and provides the fuel allocation for the internal combustion engine 1.
- a catalytic converter 5 which has three-way properties , It also has a NO x -reducing function, for the regulation of which a NO x sensor 6 is provided downstream of the catalytic converter 5.
- the NO-reducing mode of operation of the exhaust gas cleaning system is not important.
- the catalytic converter 5 Due to its three-way properties, the catalytic converter 5 has an optimal effect with a lambda value ⁇ 0 .
- ⁇ 0 can be between 0.99 and 1 depending on the catalyst.
- a pre-cat lambda probe 7 is provided upstream of the catalytic converter 5, which like the NO x sensor 6 does not exceed its measured values outputs lines specified in more detail to the operating control device 2.
- the operating control device 2 is also supplied with the measured values of further sensors, in particular for the speed, load, catalyst temperature, etc. The operating control device 2 controls the operation of the internal combustion engine 1 with the aid of these measured values.
- the internal combustion engine 1 is operated in a lambda control in such a way that the signal of the lambda probe 7 indicating the oxygen content in the raw exhaust gas corresponds on average to a predetermined signal level.
- this signal level in the exhaust gas corresponds to ⁇ 0 , that is to say the lambda value at which the catalytic converter 5 has optimal three-way properties.
- the trim controller 8 then generates a manipulated value that compensates for such a shift, so that it is ensured that the internal combustion engine 1 is regulated by the operating control device 2 in such a way that the lambda value of the raw exhaust gas in the exhaust tract 4 upstream of the catalytic converter 5 is as accurate as possible to the desired lambda value at which the catalytic converter 5 has optimal properties, corresponds to it and is therefore in the so-called catalytic converter window.
- the trim controller 8 requires a post-cat lambda signal for this trim control, which reproduces the lambda value of the exhaust gas downstream of the catalytic converter 5 with sufficient precision.
- a NO x sensor 6 is used to obtain this signal, which not only emits a NO x -dependent signal but also a binary lambda signal.
- a separate binary lambda sensor downstream of the catalytic converter 5 can also be used.
- the course of the post-cat lambda signal as a function of the lambda value is shown in curve 9 of FIG. 2. As can be seen, the output voltage U increases with falling lambda values. In the lean range, with lambda values well above 1, the slope of curve 9 of the post-cat lambda signal is relatively flat.
- the trim controller 8 no longer uses the post-cat lambda signal, which is shown in curve 9, but rather the NO x concentration indicating signal of the NO x sensor 6. This signal is shown as curve 13 in FIG. 2.
- a broadband lambda probe can also be used. 3, the curve 9 of the post-cat lambda signal being drawn in again.
- the broadband lambda signal 15 depends on the lambda value in a strictly monotonous increase. However, it is subject to aging influences, which can lead to a shift by an offset V, so that the
- Broadband lambda signal 15 can also have the course designated by reference numeral 16. If such an aging dependency occurs, the broadband lambda signal 15 is not readily suitable for trim control.
- the trim controller 8 then corrects the offset V in the following way:
- the signal level of the broadband lambda signal which is present at the same time is determined. Since the lambda value is known at the same time, the current offset V of the broadband lambda signal can be determined therefrom. This value for the offset is continuously taken into account in the determination of the lambda value from the broadband lambda signal 15 if the trim controller 8 uses the broadband lambda signal and not the postcat lambda signal at trim levels of the post-cat lambda signal above the threshold value for trim control.
- the broadband lambda signal can also be used continuously for trim control, each time the signal level of the post-cat lambda signal a predetermined lambda value of the exhaust gas downstream of the catalyst 5 indicates the offset V is determined and thereby an adjustment of the broadband lambda signal is achieved.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10117050A DE10117050C1 (de) | 2001-04-05 | 2001-04-05 | Verfahren zum Reinigen des Abgases einer Brennkraftmaschine |
DE10117050 | 2001-04-05 | ||
PCT/DE2002/000839 WO2002081887A2 (de) | 2001-04-05 | 2002-03-08 | Verfahren zum reinigen des abgases einer brennkraftmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1373700A2 true EP1373700A2 (de) | 2004-01-02 |
EP1373700B1 EP1373700B1 (de) | 2007-08-01 |
Family
ID=7680542
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02722002A Expired - Fee Related EP1373700B1 (de) | 2001-04-05 | 2002-03-08 | Verfahren zum reinigen des abgases einer brennkraftmaschine |
Country Status (4)
Country | Link |
---|---|
US (1) | US7028464B2 (de) |
EP (1) | EP1373700B1 (de) |
DE (2) | DE10117050C1 (de) |
WO (1) | WO2002081887A2 (de) |
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US7018442B2 (en) * | 2003-11-25 | 2006-03-28 | Caterpillar Inc. | Method and apparatus for regenerating NOx adsorbers |
FR2874091B1 (fr) * | 2004-08-06 | 2006-11-24 | Peugeot Citroen Automobiles Sa | Systeme de correction d'un signal de sortie d'une sonde a oxygene |
DE102004060125B4 (de) * | 2004-12-13 | 2007-11-08 | Audi Ag | Verfahren zur Steuerung der Be- und Entladung des Sauerstoffspeichers eines Abgaskatalysators |
DE102005002237A1 (de) * | 2005-01-18 | 2006-07-20 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Brennkraftmaschine und Vorrichtung zur Durchführung des Verfahrens |
US7389773B2 (en) * | 2005-08-18 | 2008-06-24 | Honeywell International Inc. | Emissions sensors for fuel control in engines |
EP2005251B1 (de) * | 2006-04-04 | 2011-11-02 | tesa scribos GmbH | Vorrichtung und verfahren zur steuerung einer vorrichtung zur mikrostrukturierung eines speichermediums |
US7581390B2 (en) * | 2006-04-26 | 2009-09-01 | Cummins Inc. | Method and system for improving sensor accuracy |
US20080190099A1 (en) * | 2006-12-20 | 2008-08-14 | Aleksey Yezerets | System and method for inhibiting uncontrolled regeneration of a particulate filter for an internal combustion engine |
JP4492669B2 (ja) * | 2007-10-24 | 2010-06-30 | トヨタ自動車株式会社 | 内燃機関の空燃比制御装置 |
DE102008018013B3 (de) * | 2008-04-09 | 2009-07-09 | Continental Automotive Gmbh | Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine |
US8060290B2 (en) | 2008-07-17 | 2011-11-15 | Honeywell International Inc. | Configurable automotive controller |
US8620461B2 (en) | 2009-09-24 | 2013-12-31 | Honeywell International, Inc. | Method and system for updating tuning parameters of a controller |
US8504175B2 (en) | 2010-06-02 | 2013-08-06 | Honeywell International Inc. | Using model predictive control to optimize variable trajectories and system control |
US9677493B2 (en) | 2011-09-19 | 2017-06-13 | Honeywell Spol, S.R.O. | Coordinated engine and emissions control system |
US9650934B2 (en) | 2011-11-04 | 2017-05-16 | Honeywell spol.s.r.o. | Engine and aftertreatment optimization system |
US20130111905A1 (en) | 2011-11-04 | 2013-05-09 | Honeywell Spol. S.R.O. | Integrated optimization and control of an engine and aftertreatment system |
US10563606B2 (en) | 2012-03-01 | 2020-02-18 | Ford Global Technologies, Llc | Post catalyst dynamic scheduling and control |
DE102012019907B4 (de) * | 2012-10-11 | 2017-06-01 | Audi Ag | Verfahren zum Betreiben einer Brennkraftmaschine mit einer Abgasreinigungseinrichtung sowie entsprechende Brennkraftmaschine |
DE102014015523B3 (de) * | 2014-10-20 | 2015-11-05 | Audi Ag | Verfahren zum Betreiben einer Antriebseinrichtung sowie entsprechende Antriebseinrichtung |
EP3051367B1 (de) | 2015-01-28 | 2020-11-25 | Honeywell spol s.r.o. | Ansatz und system zur handhabung von einschränkungen für gemessene störungen mit unsicherer vorschau |
EP3056706A1 (de) | 2015-02-16 | 2016-08-17 | Honeywell International Inc. | Ansatz zur nachbehandlungssystemmodellierung und modellidentifizierung |
EP3091212A1 (de) | 2015-05-06 | 2016-11-09 | Honeywell International Inc. | Identifikationsansatz für verbrennungsmotor-mittelwertmodelle |
EP3734375B1 (de) | 2015-07-31 | 2023-04-05 | Garrett Transportation I Inc. | Quadratischer programmlöser für mpc mit variabler anordnung |
US10272779B2 (en) | 2015-08-05 | 2019-04-30 | Garrett Transportation I Inc. | System and approach for dynamic vehicle speed optimization |
US10415492B2 (en) | 2016-01-29 | 2019-09-17 | Garrett Transportation I Inc. | Engine system with inferential sensor |
US10036338B2 (en) | 2016-04-26 | 2018-07-31 | Honeywell International Inc. | Condition-based powertrain control system |
US10124750B2 (en) | 2016-04-26 | 2018-11-13 | Honeywell International Inc. | Vehicle security module system |
DE102016207516B4 (de) * | 2016-05-02 | 2021-10-28 | Vitesco Technologies GmbH | Verfahren zur Alterungsbestimmung einer zur Ermittlung einer Gaskonzentration eines Gasgemischs ausgebildeten Sonde einer Brennkraftmaschine |
WO2018101918A1 (en) | 2016-11-29 | 2018-06-07 | Honeywell International Inc. | An inferential flow sensor |
JP2018178762A (ja) * | 2017-04-04 | 2018-11-15 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
DE102017218327B4 (de) | 2017-10-13 | 2019-10-24 | Continental Automotive Gmbh | Verfahren zum Betreiben einer Brennkraftmaschine mit Dreiwegekatalysator und Lambdaregelung |
US11057213B2 (en) | 2017-10-13 | 2021-07-06 | Garrett Transportation I, Inc. | Authentication system for electronic control unit on a bus |
DE102018206451B4 (de) | 2018-04-26 | 2020-12-24 | Vitesco Technologies GmbH | Verfahren zum Betreiben einer Brennkraftmaschine mit 3-Wege-Katalysator und Lambdaregelung über NOx-Emissionserfassung |
DE102020106502B4 (de) | 2020-03-10 | 2024-01-04 | Audi Aktiengesellschaft | Verfahren zum Betreiben einer Antriebseinrichtung mit einer Sensoreinrichtung sowie entsprechende Antriebseinrichtung |
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JPH08507143A (ja) * | 1993-02-26 | 1996-07-30 | ロート‐テヒニーク・ゲー・エム・ベー・ハー・ウント・コー・フォルシュング・フュア・アウトモービル‐ウント・ウムヴェルトテヒニーク | ラムダセンサの組合せ |
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-
2001
- 2001-04-05 DE DE10117050A patent/DE10117050C1/de not_active Expired - Fee Related
-
2002
- 2002-03-08 US US10/473,970 patent/US7028464B2/en not_active Expired - Lifetime
- 2002-03-08 EP EP02722002A patent/EP1373700B1/de not_active Expired - Fee Related
- 2002-03-08 DE DE50210592T patent/DE50210592D1/de not_active Expired - Lifetime
- 2002-03-08 WO PCT/DE2002/000839 patent/WO2002081887A2/de active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO02081887A2 * |
Also Published As
Publication number | Publication date |
---|---|
EP1373700B1 (de) | 2007-08-01 |
WO2002081887A3 (de) | 2002-12-12 |
US7028464B2 (en) | 2006-04-18 |
DE50210592D1 (de) | 2007-09-13 |
DE10117050C1 (de) | 2002-09-12 |
US20040103642A1 (en) | 2004-06-03 |
WO2002081887A2 (de) | 2002-10-17 |
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