EP1415079B1 - Procede et appareil de commande pour diagnostics de fonctionnement d'une soupape de ventilation de reservoir d'installation de reservoir de carburant, notamment d'automobile - Google Patents

Procede et appareil de commande pour diagnostics de fonctionnement d'une soupape de ventilation de reservoir d'installation de reservoir de carburant, notamment d'automobile Download PDF

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Publication number
EP1415079B1
EP1415079B1 EP02754259A EP02754259A EP1415079B1 EP 1415079 B1 EP1415079 B1 EP 1415079B1 EP 02754259 A EP02754259 A EP 02754259A EP 02754259 A EP02754259 A EP 02754259A EP 1415079 B1 EP1415079 B1 EP 1415079B1
Authority
EP
European Patent Office
Prior art keywords
fuel tank
pressure source
ventilation valve
tank ventilation
power drain
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.)
Expired - Lifetime
Application number
EP02754259A
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German (de)
English (en)
Other versions
EP1415079A1 (fr
Inventor
Martin Streib
Dieter Lederer
Karl-Bernhard Lederle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1415079A1 publication Critical patent/EP1415079A1/fr
Application granted granted Critical
Publication of EP1415079B1 publication Critical patent/EP1415079B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 checking 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 appropriate, for preventing the 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 an increasing temperature of the fuel in the tank and the associated increase in the fuel vapor pressure.
  • the activated carbon trap has a tank ventilation valve (TEV) with one for sucking in combustion air serving intake manifold connected to the internal combustion engine via a throttle valve. 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, DE 196 36 431.0 A1, DE 198 09 384.5 A1 and DE 196 25 702 A1.
  • the tank system is pressurized by means of a pump and, by subsequently evaluating the pressure profile, it is concluded that there is a leak.
  • similar methods have become known from JP-6-173837 and US Pat. No. 5,347,971, in which a reference leak is connected in parallel to the tank system and in which a comparison of the measurements with and without a reference leak provides information about the presence of a leak.
  • 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 invention proposes to control the opening or closing of the tank ventilation valve, to carry out a specific pressure change, at least to record the current consumption of the pressure source and to conclude from the recorded current consumption 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 the current consumption of the pressure source is recorded and, based on the recorded current consumption, if appropriate, a closed tank ventilation valve is closed.
  • the tank ventilation valve is subsequently opened and the current consumption of the pressure source is recorded when the pressure is reduced.
  • the tank ventilation valve is actuated in an opening manner and pressure is reduced in the tank ventilation system, the current consumption of the pressure source being recorded and a functionally opening tank ventilation valve being inferred from the detected electrical operating variable, and the tank ventilation valve subsequently being actuated in closing the current build-up, the current consumption of the pressure source is recorded and, if necessary, a closed tank ventilation valve is concluded from the recorded current consumption.
  • 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. The tank ventilation valve is then actuated in an opening manner, and the functionality of the tank ventilation valve may be concluded from the relative change in the current consumption of the pressure source compared to the idle operating variable.
  • the proposed method can also be applied to systems with only a slight intake manifold vacuum, for example VVT 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 level of information security are provided.
  • a quantitative statement about the actual volume flow behavior of the TEV is also made possible.
  • the invention can be advantageously used 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.
  • 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.
  • TSV 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.
  • the switchover valve 32 is now sucked in fresh air 22 from the environment through the activated carbon filter 14, with any fuel stored therein being released into the sucked-in air is and the activated carbon filter 14 is regenerated as a result.
  • a leak diagnosis unit 28 connected to the activated carbon filter 14 is provided.
  • the diagnostic unit 28 comprises a vane pump 30.
  • the changeover 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 selected so that it is the 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 switching 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. During the pumping of the fresh air into the tank 10, the current consumption of the pump 30 is continuously recorded. 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.
  • FIGS. 2 and 3 show temporal profiles of the control voltage U_UmschV of the changeover valve 32, the activation of the TEV 20, the pump current or 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 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 To be able to calculate TEV 20 flowing mass or 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 is recorded under idle 202.
  • 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)

Claims (10)

  1. Procédé permettant de tester la capacité à fonctionner d'une soupape de ventilation de réservoir (20) disposée dans une installation de réservoir, notamment d'un véhicule automobile, pouvant être commandé au moyen d'une unité de commande (21) et raccordée à un tuyau d'aspiration (16), selon lequel une source de pression (30) permet de tester l'étanchéité de l'installation de réservoir au moyen d'une surpression ou d'une sous-pression,
    caractérisé en ce que
    la soupape de ventilation de réservoir (20) est commandée pour s'ouvrir ou se fermer, et effectuer une variation de pression déterminée (100, 108), et l'intensité absorbée (102) de la source de pression (30) est alors saisie et la saisie de l'intensité absorbée (102) permet de conclure à une soupape de ventilation de réservoir (20) fonctionnellement ouvrante ou fermante.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    la soupape de ventilation de réservoir (20) est commandée pour se fermer (112) et la source de pression (30), produit une montée de pression déterminée (100) dans l'installation de ventilation de réservoir, l'intensité absorbée (102) de la source de pression (30) est saisie et la saisie de l'intensité absorbée (102) de la source de pression permet de conclure à une soupape de ventilation de réservoir (20) fonctionnellement fermante, et la soupape de ventilation de réservoir (20) est ensuite commandée pour s'ouvrir (106), créant ainsi une chute de pression (110) lors de laquelle l'intensité absorbée (102) de la source de pression (30) est saisie et la saisie de l'intensité absorbée (102) de la source de pression permet de conclure à une soupape de ventilation de réservoir (20) fonctionnellement ouvrante.
  3. Procédé selon la revendication 1,
    caractérisé en ce que
    la soupape de ventilation de réservoir (20) est ensuite commandée pour s'ouvrir (106), créant ainsi une chute de pression (108) dans l'installation de ventilation de réservoir, l'intensité absorbée (102) de la source de pression (30) est saisie et la saisie de l'intensité absorbée de la source de pression (110) permet de conclure à une soupape de ventilation de réservoir (20) fonctionnellement ouvrante, et la soupape de ventilation de réservoir (20) est ensuite commandée pour se fermer, créant ainsi une montée de pression lors de laquelle l'intensité absorbée de la source de pression (30) est saisi et cette saisie de l'intensité absorbée de la source de pression permet de conclure à une soupape de ventilation de réservoir (20) fonctionnellement fermante
  4. Procédé selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce que
    l'intensité absorbée de la source de pression (30) est saisi (valeur en fonctionnement à vide) et la variation relative de l'intensité absorbée de la source de pression par rapport à la valeur en fonctionnement à vide permet de conclure à la capacité à fonctionner de la soupape de ventilation de réservoir (20).
  5. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la soupape de ventilation de réservoir (20) est commandée pour se fermer (200), la source de pression (30) est activée brièvement, l'intensité absorbée de la source de pression (202) est alors saisie lors du fonctionnement à vide de la source de pression (30) (valeur en fonctionnement à vide), et la soupape de ventilation de réservoir (20) est ensuite commandée pour s'ouvrir (204), et la variation relative de l'intensité absorbée (I_Pumpe) de la source de pression (30) par rapport à la valeur en fonctionnement à vide permet de conclure à la capacité à fonctionner de la soupape de ventilation de réservoir (20).
  6. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le dépassement ou la non-atteinte d'une valeur seuil prédéterminée (I_Schw1, I_Schw2) de l'intensité absorbée de la source de pression (30) permet de conclure à la capacité à fonctionner de la soupape de ventilation de réservoir (20).
  7. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la variation déterminée de pression s'effectue au moins deux fois.
  8. Procédé selon la revendication 7,
    caractérisé en ce que
    les au moins deux variations de pression se produisent chacune avec un rapport cyclique différent et le gradient de la variation de l'intensité absorbée de la source de pression (30) permet de conclure au comportement fonctionnel quantitatif de la soupape de ventilation de réservoir (20).
  9. Appareil de commande, dans lequel l'utilisation d'un code de programme permet d'effectuer la mise en oeuvre du procédé selon l'une quelconque des revendications précédentes.
  10. Appareil de diagnostic de fuites d'un réservoir, dans lequel l'utilisation d'un code de programme permet d'effectuer la mise en oeuvre du procédé selon l'une quelconque des revendications 1 à 8.
EP02754259A 2001-07-25 2002-06-21 Procede et appareil de commande pour diagnostics de fonctionnement d'une soupape de ventilation de reservoir d'installation de reservoir de carburant, notamment d'automobile Expired - Lifetime EP1415079B1 (fr)

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 (fr) 2001-07-25 2002-06-21 Procede et appareil de commande pour diagnostics de fonctionnement d'une soupape de ventilation de reservoir d'installation de reservoir de carburant, notamment d'automobile

Publications (2)

Publication Number Publication Date
EP1415079A1 EP1415079A1 (fr) 2004-05-06
EP1415079B1 true EP1415079B1 (fr) 2004-12-22

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EP02754259A Expired - Lifetime EP1415079B1 (fr) 2001-07-25 2002-06-21 Procede et appareil de commande pour diagnostics de fonctionnement d'une soupape de ventilation de reservoir d'installation de reservoir de carburant, notamment d'automobile

Country Status (5)

Country Link
US (1) US7162914B2 (fr)
EP (1) EP1415079B1 (fr)
JP (1) JP2004536998A (fr)
DE (2) DE10136183A1 (fr)
WO (1) WO2003012278A1 (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
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 (fr) * 2009-11-30 2014-01-08 Ford Global Technologies, LLC Réservoir de carburant
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)

* Cited by examiner, † Cited by third party
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
DE10019935A1 (de) * 2000-04-06 2001-10-25 Bosch Gmbh Robert Verfahren zur Dichtheitsprüfung einer Tankentlüftungsanlage eines Fahrzeugs
WO2001077517A1 (fr) * 2000-04-06 2001-10-18 Robert Bosch Gmbh Procede pour controler l"etancheite d"une unite d"aeration de reservoir d"un vehicule
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

Also Published As

Publication number Publication date
US20050034513A1 (en) 2005-02-17
EP1415079A1 (fr) 2004-05-06
WO2003012278A1 (fr) 2003-02-13
DE10136183A1 (de) 2003-02-20
US7162914B2 (en) 2007-01-16
DE50201855D1 (de) 2005-01-27
JP2004536998A (ja) 2004-12-09

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