EP1415079A1 - Verfahren und steuergerät zur funktionsdiagnose eines tankentlüftungsventils einer brennstofftankanlage insbesondere eines kraftfahrzeugs - Google Patents
Verfahren und steuergerät zur funktionsdiagnose eines tankentlüftungsventils einer brennstofftankanlage insbesondere eines kraftfahrzeugsInfo
- Publication number
- EP1415079A1 EP1415079A1 EP02754259A EP02754259A EP1415079A1 EP 1415079 A1 EP1415079 A1 EP 1415079A1 EP 02754259 A EP02754259 A EP 02754259A EP 02754259 A EP02754259 A EP 02754259A EP 1415079 A1 EP1415079 A1 EP 1415079A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ventilation valve
- tank ventilation
- operating variable
- pressure source
- tank
- 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
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
- F02M25/0809—Judging failure of purge control system
- F02M25/0818—Judging failure of purge control system having means for pressurising the evaporative emission space
Definitions
- the invention relates to a method for testing the functionality of a tank ventilation valve arranged in a fuel tank system, in particular a motor vehicle, and a control device for carrying out the method according to the preambles of the respective independent claims.
- Modern internal combustion engines used in motor vehicles are known to have a fuel storage tank and a control device for monitoring and, if necessary, to prevent emission of fuel vapors formed in the fuel storage tank.
- the control device is used in particular to capture any fuel vapor that may occur by means of an activated carbon trap or an activated carbon filter and to temporarily store it in the activated carbon trap.
- Volatile fuel vapors which are mostly hydrocarbon vapors, are formed, for example, during a refueling process of the vehicle or due to a rising fuel temperature in the tank and the associated increase in fuel vapor pressure.
- the activated carbon trap is connected via a tank ventilation valve (TEV) to an intake pipe serving to draw in combustion air via a throttle valve to the internal combustion engine. Opening the TEV creates a pressure drop between the activated carbon trap and the intake manifold, by means of which the hydrocarbon stored in the activated carbon trap is fed into the intake manifold in order to ultimately be burned in the internal combustion engine and thus disposed of.
- TEV tank ventilation valve
- a first known approach to diagnosing the TEV involves operating the TEV at idle at a sufficiently stable operating point and observing the change in the mixture composition supplied to the internal combustion engine and the change in the energy flow via the throttle valve.
- the energy flow mentioned corresponds to the product of the air mass flow discharged via the throttle valve and the ignition angle efficiency. This method therefore requires a high intake manifold vacuum.
- the diagnosis takes place as part of a normal leak test of the tank system.
- a normal leak test of the tank system Such a method can be seen, for example, from the publications US 5,349,935, PE 106 36 431.0 Ali, DE 108 '09 304.5 AI and DE 196 25 702 A1J.
- the tank system is pressurized by means of a pump and then evaluated of the pressure curve, if necessary, concluded that there is a leak.
- ⁇ JP-'G "173'l3-9- / f-mid.
- the present invention is therefore based on the object of developing a method and a control device of the type mentioned at the outset such that the highest possible level of diagnostic reliability is provided with the shortest possible diagnostic duration.
- the object is achieved by the features of the independent claims.
- Advantageous refinements of the method according to the invention and further developments of the control unit are the subject of the subclaims.
- the invention proposes to control the tank ventilation valve to open or close, to carry out a specific pressure change, to record at least one operating variable of the pressure source and to conclude from the recorded operating variable that there is a functionally opening or closing tank ventilation valve.
- the tank ventilation valve is actuated in a closing manner and a certain pressure build-up is generated in the tank ventilation system by means of the pressure source.
- the at least one operating variable of the pressure source is recorded and, from the recorded operating variable, if necessary, a closed tank ventilation valve is closed.
- the tank venting valve is then actuated opening and the at least one operating variable of the pressure source is recorded when the pressure is reduced.
- the tank ventilation valve can be actuated in an opening manner and for the pressure in the tank ventilation system to be reduced, the at least one operating variable of the pressure source and a closed operable tank ventilation valve is deduced from the recorded operating variable, and that the tank ventilation valve is then actuated in closing, when the pressure builds up, the at least one operating variable of the pressure source is recorded and, if necessary, a closed tank ventilation valve is concluded from the recorded operating variable.
- the tank ventilation valve is activated in a closing manner and the pressure source is initially activated briefly. An idle operating variable of the pressure source is recorded. Subsequently, the tank ventilation valve is actuated in an opening manner and, from the relative change in the at least one operating variable of the pressure source compared to the idling operating variable, the operational functionality of the tank ventilation valve may be inferred.
- the proposed method can also be applied to systems with only a low intake manifold vacuum, for example WT systems.
- the method does not require pumping upstream of the actual TEV diagnosis against a reference leak and subsequent pressure build-up until a reference current level is reached.
- a significantly shortened TEV diagnosis time and at the same time a higher information Security provided.
- a quantitative statement about the actual volume flow behavior of the TEV is also possible.
- the invention can be used advantageously not only in motor vehicle technology, but in all areas in which tank systems are to be kept free of volatile substances in the manner mentioned at the beginning. For example, only the petrochemical sector is given here.
- FIG. 1 shows a fuel tank system in which a method making use of the invention or a control unit according to the invention are used ?
- FIG. 2 control signals provided in accordance with a first exemplary embodiment and measurement data resulting therefrom as a function of time;
- FIG. 3 shows a diagram corresponding to FIG. 2 according to a second exemplary embodiment.
- the fuel tank system shown in block diagram form in FIG. 1 comprises a tank 10 which is connected to an activated carbon filter 14 via a tank connection line 12.
- An intake manifold 16 (not shown) of an internal combustion engine (not shown) has a throttle valve, is also connected to the tank 10 via the activated carbon filter 14, via an intake line 18 and via a tank ventilation valve (TEV) 20.
- TAV tank ventilation valve
- volatile hydrocarbon vapors are formed in the tank, which pass through the line 12 into the activated carbon filter 14 and are reversibly bound in a known manner.
- a leak diagnosis unit 28 connected to the activated carbon filter 14 is provided.
- the diagnostic unit 28 comprises a vane pump 30.
- the switching valve 32 already mentioned is connected upstream of the pump 30.
- a reference leak 36 is introduced into a separate line branch 34.
- the reference leak 36 is opened or closed by means of a magnetic slide valve 38.
- the respective dimensioning of the reference leak 36 is chosen such that it corresponds to the size of the leak to be detected. In the case of the US standard mentioned at the outset, the reference leak therefore has an opening cross section of 0.5 mm.
- the changeover valve 32 has two switching positions. In the first position, the pump 30 is connected to the tank 10 in a pressure-conducting manner via the activated carbon filter 14 and thus pumps outside air into the tank 10. The current consumption of the pump 30 is continuously recorded while the fresh air is being pumped into the tank 10. To carry out a reference measurement, the changeover valve 32 is completely closed, so that the current consumption of the pump 30 can now be detected by means of the magnetic slide valve 38 due to the dynamic pressure building up in front of the reference leak 36. The control of the pump 30 by means of the control unit 21 and the reading out of the current consumption data takes place via corresponding control and data lines 44, 46.
- Figures 2 and 3 show temporal profiles of the control voltage U_UmschV of the changeover valve 32, the control of the TEV 20, the pump current and the pump Current consumption I_Pumpe and the pressure in the tank system p_Tankanl., As they occur in two different configurations of the method according to the invention.
- the TEV 20 is then activated 106 at t2, which, when the TEV 20 is actually opened, leads to a pressure drop 108 in the tank system and thus to a drop 110 in the current consumption of the pump 30. If the amount of this drop in a second threshold value I_Schw2, which is again to be determined empirically, is exceeded, a correctly opening TEV 20 is inferred.
- the above-described cycle of pressure build-up 100 and pressure reduction 108 with closed 112 or open 106 controlled TEV 20 can be repeated several times to increase the quality of the functional diagnosis, as shown in the example. So there is a second pressure increase between t3 and t4 and subsequently a pressure drop between t4 and t5.
- the TEV 20 can be controlled with different duty cycles to open, for example by detecting the time gradient of the current consumption I_Pumpe of the pump 30 the actual, by the TEV 20 flowing mass or To be able to calculate volume flow.
- FIG. 3 shows a second exemplary embodiment in a representation similar to FIG. 2, in which, in contrast to FIG. 2, the TEV diagnosis is carried out using a negative pressure method.
- the pump 30 is briefly activated and its current consumption I_Pumpe under idle 202 detected.
- the TEV 20 is actuated opening 204, as a result of which a pressure reduction 206 occurs in the tank system due to the existing intake manifold vacuum when the TEV 20 is actually opened.
- the functionality of the TEV 20 is inferred from the difference in the detected idle current 202.
- the cycles are repeated several times and, as described above, different duty cycles may be used.
- the above-described method steps for diagnosing the TEV 20 can be implemented by appropriate programming of the control unit 21, for example by inserting an appropriate program code into an EEPROM.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10136183 | 2001-07-25 | ||
DE10136183A DE10136183A1 (de) | 2001-07-25 | 2001-07-25 | Verfahren und Steuergerät zur Funktionsdiagnose eines Tankentlüftungsventils einer Brennstofftankanlage insbesondere eines Kraftfahrzeuges |
PCT/DE2002/002297 WO2003012278A1 (de) | 2001-07-25 | 2002-06-21 | Verfahren und steuergerät zur funktionsdiagnose eines tankentluftungsventils einer brennstofftankanlage insbesondere eines kraftfahzeugs |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1415079A1 true EP1415079A1 (de) | 2004-05-06 |
EP1415079B1 EP1415079B1 (de) | 2004-12-22 |
Family
ID=7693014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02754259A Expired - Lifetime EP1415079B1 (de) | 2001-07-25 | 2002-06-21 | Verfahren und steuergerät zur funktionsdiagnose eines tankentlüftungsventils einer brennstofftankanlage insbesondere eines kraftfahrzeugs |
Country Status (5)
Country | Link |
---|---|
US (1) | US7162914B2 (de) |
EP (1) | EP1415079B1 (de) |
JP (1) | JP2004536998A (de) |
DE (2) | DE10136183A1 (de) |
WO (1) | WO2003012278A1 (de) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004007520A1 (de) * | 2004-02-17 | 2005-08-25 | Robert Bosch Gmbh | Verfahren zur Prüfung der Funktionsfähigkeit einer Tankentlüftungsanlage eines Kraftfahrzeugs mit einer Brennkraftmaschine |
DE102007016217A1 (de) | 2007-04-04 | 2008-10-09 | Audi Ag | Verfahren und Vorrichtung zum Prüfen einer Bewegbarkeit eines Unterdruckventils einer Kraftstoffanlage eines Kraftfahrzeugs |
DE102008000759A1 (de) * | 2008-03-19 | 2009-09-24 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Prüfung der Funktionsfähigkeit eines Tankentlüftungsventils |
US20100147232A1 (en) * | 2008-12-12 | 2010-06-17 | Solutions With Water, Llc | System and method for improving fuel economy in combustion engines |
DE102008063758B4 (de) | 2008-12-19 | 2018-02-15 | Volkswagen Ag | Verfahren zum Prüfen eines Tankentlüftungssystems |
DE102008064345A1 (de) * | 2008-12-20 | 2010-06-24 | Audi Ag | Verfahren zur Prüfung der Funktion eines Tankentlüftungsventils |
DE102010031216B4 (de) | 2009-09-18 | 2024-03-14 | Robert Bosch Gmbh | Verfahren zur Prüfung der Funktionsfähigkeit eines Tankabsperrventils einer Kraftstoff-Tankanlage |
EP2333291B1 (de) * | 2009-11-30 | 2014-01-08 | Ford Global Technologies, LLC | Kraftstofftank |
US8560167B2 (en) | 2011-02-18 | 2013-10-15 | Ford Global Technologies, Llc | System and method for performing evaporative leak diagnostics in a vehicle |
DE102011084859B4 (de) * | 2011-10-20 | 2024-04-25 | Robert Bosch Gmbh | Verfahren zur Diagnose eines Tankentlüftungsventils |
JP5582367B2 (ja) * | 2012-07-25 | 2014-09-03 | 株式会社デンソー | 蒸発燃料処理装置 |
CN103983406A (zh) * | 2014-05-07 | 2014-08-13 | 青岛双凌科技设备有限公司 | 一种汽车制动橡胶皮碗低温密封性能试验装置 |
CN106197902B (zh) * | 2016-07-22 | 2019-01-18 | 华中科技大学 | 一种气密检测装置及其伺服控制方法 |
JP6654522B2 (ja) | 2016-07-27 | 2020-02-26 | 愛三工業株式会社 | 蒸発燃料処理装置 |
CN108680311A (zh) * | 2018-05-31 | 2018-10-19 | 广东国华人防科技有限公司 | 气密检测装置及其检测人防过滤吸收器的气密性的方法 |
US10717355B2 (en) | 2018-12-19 | 2020-07-21 | Ford Global Technologies, Llc | Systems and methods for fuel tank grade vent valve diagnostics |
DE102019215472B4 (de) * | 2019-10-09 | 2023-05-11 | Vitesco Technologies GmbH | Verfahren sowie Vorrichtung zur Ermittlung des Durchflusses durch ein Taktventil |
CN115126635A (zh) * | 2021-03-26 | 2022-09-30 | 重庆金康赛力斯新能源汽车设计院有限公司 | 一种基于obd的燃油泄漏诊断方法和装置 |
US11428184B1 (en) | 2021-04-26 | 2022-08-30 | Ford Global Technologies, Llc | Method and system for diagnosing grade vent valves |
Family Cites Families (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3909887A1 (de) * | 1989-03-25 | 1990-09-27 | Bosch Gmbh Robert | Verfahren und vorrichtung zur ueberpruefung der steuerbarkeit eines tankentlueftungsventils |
DE4124465C2 (de) | 1991-07-24 | 2002-11-14 | Bosch Gmbh Robert | Tankentlüftungsanlage und Kraftfahrzeug mit einer solchen sowie Verfahren und Vorrichtung zum Prüfen der Funktionsfähigkeit einer solchen |
US5273020A (en) * | 1992-04-30 | 1993-12-28 | Nippondenso Co., Ltd. | Fuel vapor purging control system for automotive vehicle |
JP3116556B2 (ja) | 1992-06-08 | 2000-12-11 | 株式会社デンソー | 内燃機関の燃料タンク系の気密チェック装置 |
DE4222298B4 (de) | 1992-07-08 | 2005-11-03 | Robert Bosch Gmbh | Verfahren zur Dämpfung von auftretenden Ruckelschwingungen für Brennkraftmaschinen |
DE4401887C2 (de) * | 1993-01-29 | 1997-07-24 | Siemens Ag | Verfahren zur Diagnose von Komponenten eines Tankentlüftungssystems |
FR2731467B1 (fr) * | 1995-03-06 | 1997-04-18 | Siemens Automotive Sa | Procede de diagnostic du fonctionnement de la vanne de purge d'un systeme de recuperation de vapeurs de carburant, pour un vehicule automobile |
JP3886587B2 (ja) | 1996-03-01 | 2007-02-28 | ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | 内燃機関付車両のタンク系統の気密試験方法 |
US5685279A (en) * | 1996-03-05 | 1997-11-11 | Chrysler Corporation | Method of de-pressurizing an evaporative emission control system |
DE19625702A1 (de) | 1996-06-27 | 1998-01-02 | Bosch Gmbh Robert | Verfahren und Vorrichtung zur Dichtheitsprüfung eines Behältnisses |
DE19636431B4 (de) * | 1996-09-07 | 2009-05-14 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Prüfung der Funktionsfähigkeit einer Tankentlüftungsanlage |
US5817925A (en) * | 1997-03-26 | 1998-10-06 | Siemens Electric Limited | Evaporative emission leak detection system |
DE19809384C2 (de) * | 1998-03-05 | 2000-01-27 | Bosch Gmbh Robert | Verfahren zur Prüfung der Funktionsfähigkeit einer Tankentlüftungsanlage |
DE19836295B4 (de) * | 1998-08-11 | 2004-07-08 | Robert Bosch Gmbh | Verfahren zur Prüfung der Funktionsfähigkeit einer Tankentlüftungsanlage eines Fahrzeugs |
US6282945B1 (en) * | 1999-12-16 | 2001-09-04 | Siemens Automotive, Inc. | Method and system for aggressive cycling of leak detection pump to ascertain vapor leak size |
DE10006186C1 (de) * | 2000-02-11 | 2001-06-13 | Bosch Gmbh Robert | Verfahren zur Dichtheitsprüfung eines Tanksystems eines Fahrzeugs |
DE10006185C1 (de) * | 2000-02-11 | 2001-06-13 | Bosch Gmbh Robert | Verfahren zur Dichtheitsprüfung einer Tankanlage eines Fahrzeugs |
EP1272755B1 (de) * | 2000-04-06 | 2006-12-27 | Robert Bosch Gmbh | Verfahren zur dichtheitsprüfung einer tankentlüftungsanlage eines fahrzeugs |
DE10019935A1 (de) * | 2000-04-06 | 2001-10-25 | Bosch Gmbh Robert | Verfahren zur Dichtheitsprüfung einer Tankentlüftungsanlage eines Fahrzeugs |
DE10018441B4 (de) * | 2000-04-13 | 2005-12-29 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur umweltschonenden Dichtheitsprüfung eines Behältnisses |
DE10019905C2 (de) * | 2000-04-20 | 2002-04-25 | Bosch Gmbh Robert | Verfahren und Vorrichtung zur Erkennung der Vereisungsgefahr bei zur Tankleckdiagnose bei Kraftfahrzeugen eingesetzten Pumpen |
DE10043071A1 (de) * | 2000-09-01 | 2002-03-14 | Bosch Gmbh Robert | Verfahren zur Diagnose des Tankentlüftungsventils |
DE10116693A1 (de) * | 2001-04-04 | 2002-10-17 | Bosch Gmbh Robert | Beheizbare Tankleckdiagnoseeinheit insbesondere für Kraftfahrzeuge |
JP4538989B2 (ja) * | 2001-06-01 | 2010-09-08 | マツダ株式会社 | 蒸発燃料処理装置の故障診断装置 |
DE10204132B4 (de) * | 2002-02-01 | 2012-03-15 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Dichtheitsprüfung eines Behältnisses |
DE10209483B4 (de) * | 2002-03-05 | 2006-07-06 | Robert Bosch Gmbh | Verfahren zur Prüfung der Funktionsfähigkeit einer Tankentlüftungsanlage und Tankentlüftungsanlagen bei Kraftfahrzeugen |
US6887284B2 (en) * | 2002-07-12 | 2005-05-03 | Dannie B. Hudson | Dual homogenization system and process for fuel oil |
JP2004232521A (ja) * | 2003-01-29 | 2004-08-19 | Denso Corp | 蒸発燃料処理装置のリークチェック装置 |
-
2001
- 2001-07-25 DE DE10136183A patent/DE10136183A1/de not_active Ceased
-
2002
- 2002-06-21 US US10/484,974 patent/US7162914B2/en not_active Expired - Fee Related
- 2002-06-21 JP JP2003517436A patent/JP2004536998A/ja active Pending
- 2002-06-21 EP EP02754259A patent/EP1415079B1/de not_active Expired - Lifetime
- 2002-06-21 WO PCT/DE2002/002297 patent/WO2003012278A1/de active IP Right Grant
- 2002-06-21 DE DE50201855T patent/DE50201855D1/de not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO03012278A1 * |
Also Published As
Publication number | Publication date |
---|---|
US7162914B2 (en) | 2007-01-16 |
WO2003012278A1 (de) | 2003-02-13 |
JP2004536998A (ja) | 2004-12-09 |
EP1415079B1 (de) | 2004-12-22 |
DE10136183A1 (de) | 2003-02-20 |
US20050034513A1 (en) | 2005-02-17 |
DE50201855D1 (de) | 2005-01-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1415079B1 (de) | Verfahren und steuergerät zur funktionsdiagnose eines tankentlüftungsventils einer brennstofftankanlage insbesondere eines kraftfahrzeugs | |
DE102012201208B4 (de) | Verfahren und System zur Kraftstoffdampfsteuerung | |
DE102013204761B4 (de) | Kraftstoffsystemdiagnose | |
DE102013223067B4 (de) | Kraftstoffsystem-diagnose | |
DE102011084403A1 (de) | Tankentlüftungssystem und Verfahren zu dessen Diagnose | |
DE102014201486A1 (de) | Steuern der Schließkraft eines Kanisterentleerungsventils vor dem Ausführen der Undichtigkeitsdiagnostik | |
DE102012220147A1 (de) | Verfahren und system zur kraftstoffdampfsteuerung | |
WO1991015670A1 (de) | Tankentlüftungsanlage für ein kraftfahrzeug und verfahren zum überprüfen deren funktionstüchtigkeit | |
DE102016210579A1 (de) | Verfahren zur diagnose von leckagen nach der entlüftungsdurchfluss-steuerblende | |
DE102010013602A1 (de) | Verfahren zur Erkennung eines Fehlverhaltens eines elektronisch geregelten Kraftstoffeinspritzsystems eines Verbrennungsmotors | |
DE102017201530A1 (de) | Tankentlüftungssystem für eine Verbrennungskraftmaschine und Verfahren zur Regenerierung eines Sorptionsspeichers | |
DE102016111193A1 (de) | Vorrichtung zur Verarbeitung von verdampftem Kraftstoff | |
DE102006056384A1 (de) | Verfahren zur Funktionsüberprüfung eines Druckschalters einer Tankentlüftungsanlage, Steuereinrichtung und Brennkraftmaschine | |
DE102009002746A1 (de) | Verfahren zur Prüfung der Funktionsfähigkeit eines Tankentlüftungsventils | |
DE10204132B4 (de) | Verfahren und Vorrichtung zur Dichtheitsprüfung eines Behältnisses | |
DE60031086T2 (de) | Diagnosevorrichtung für Kraftstoffdampfentlüftungsanlage und Drucksensor | |
DE102008030089A1 (de) | Verfahren und Vorrichtung zum Steuern einer Tankentlüftungsvorrichtung für ein Kraftfahrzeug | |
EP1377741A1 (de) | Beheizbare tankleckdiagnoseeinheit insbesondere für kraftfahrzeuge | |
DE102014208987A1 (de) | Verfahren zur Diagnose eines Tankentlüftungsventils | |
DE102004007520A1 (de) | Verfahren zur Prüfung der Funktionsfähigkeit einer Tankentlüftungsanlage eines Kraftfahrzeugs mit einer Brennkraftmaschine | |
WO2020078789A1 (de) | Tankentlüftungsventileinheit | |
DE102008063758A1 (de) | Verfahren zum Prüfen eines Tankentlüftungssystems | |
DE102009033451B4 (de) | Verfahren zum Überprüfen der Funktionsfähigkeit eines Ventils in einem Gaskanal einer Brennkraftmaschine sowie Steuervorrichtung | |
DE10126521B4 (de) | Verfahren und Vorrichtung zur Tankleckdiagnose bei erhöhter Brennstoffausgasung | |
DE102012212109A1 (de) | Tankentlüftungsanlage |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20040225 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR SE |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: GERMAN |
|
REF | Corresponds to: |
Ref document number: 50201855 Country of ref document: DE Date of ref document: 20050127 Kind code of ref document: P |
|
REG | Reference to a national code |
Ref country code: SE Ref legal event code: TRGR |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
ET | Fr: translation filed | ||
26N | No opposition filed |
Effective date: 20050923 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20070626 Year of fee payment: 6 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20070828 Year of fee payment: 6 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20070619 Year of fee payment: 6 |
|
EUG | Se: european patent has lapsed | ||
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20090228 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090101 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20080630 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20080622 |