EP0635633B1 - Procédé de contrÔle d'un système de dégazage d'un réservoir captant des vapeurs d'essence et les introduisant dans un moteur à combustion interne - Google Patents

Procédé de contrÔle d'un système de dégazage d'un réservoir captant des vapeurs d'essence et les introduisant dans un moteur à combustion interne Download PDF

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Publication number
EP0635633B1
EP0635633B1 EP93111691A EP93111691A EP0635633B1 EP 0635633 B1 EP0635633 B1 EP 0635633B1 EP 93111691 A EP93111691 A EP 93111691A EP 93111691 A EP93111691 A EP 93111691A EP 0635633 B1 EP0635633 B1 EP 0635633B1
Authority
EP
European Patent Office
Prior art keywords
tank
valve
fuel
internal combustion
combustion engine
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
EP93111691A
Other languages
German (de)
English (en)
Other versions
EP0635633A1 (fr
Inventor
Klaus Dipl.-Ing. Bayerle (Fh)
Hartmut Dipl.-Ing. Pfleger
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to DE59307433T priority Critical patent/DE59307433D1/de
Priority to EP93111691A priority patent/EP0635633B1/fr
Priority to JP6187898A priority patent/JPH0734987A/ja
Priority to US08/278,272 priority patent/US5499613A/en
Publication of EP0635633A1 publication Critical patent/EP0635633A1/fr
Application granted granted Critical
Publication of EP0635633B1 publication Critical patent/EP0635633B1/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

Definitions

  • the invention relates to a method for monitoring a tank ventilation system that collects fuel vapors and feeds an internal combustion engine according to the preamble of patent claim 1.
  • tank ventilation system which is known, for example, from WO 91/12426, is to prevent the evaporation of hydrocarbons from the fuel into the atmosphere.
  • the tank ventilation system has a fuel tank and a tank ventilation valve, which is connected to the intake manifold of the internal combustion engine, so that with the help of the negative pressure prevailing there, the fuel vapors can be sucked out of a container arranged between the tank and the tank ventilation valve during certain operating states.
  • a ventilation line with a controllable shut-off valve is provided on the bottom of the container filled with the activated carbon filter.
  • the activated carbon filter in the tank adsorbs fuel in those periods in which there is no suction from the intake manifold.
  • tank ventilation system Since there is a risk in such tank ventilation systems that parts of it leak or that the tank ventilation valve does not work properly, the tank ventilation system must be checked repeatedly for functionality during operation of the motor vehicle.
  • the ventilation valve is closed and a pressure sensor installed in the fuel tank, for example, is used to measure whether the necessary test vacuum builds up in the tank. If this is the case, it is concluded that the system is functional.
  • the pressure sensor can also be arranged at another point in the tank ventilation system, for example. in the line between the tank ventilation valve and the activated carbon canister or in the line between the activated carbon canister and the fuel tank or in the ventilation line in front of the ventilation valve.
  • a mechanical protection valve arrangement is provided in the ventilation line in the system according to WO 91/12426.
  • This mechanical protection valve arrangement has an overpressure and a vacuum protection valve, the pressures of this valve arrangement being set such that there is no risk of damage to the tank ventilation system because the pressures are too high or too low.
  • This device has the disadvantage that in addition to the ventilation valve and the tank ventilation valve, additional mechanical valves are required in the lines.
  • the invention is therefore based on the object of specifying a method for monitoring a tank ventilation system for an internal combustion engine, in which it is ensured in a simple manner only by using the components which are present in the tank ventilation system in any case that destruction of parts of the tank ventilation system is avoided if the ventilation valve malfunctions .
  • Damage to the fuel tank or other components of the tank ventilation system can be reliably prevented by using and evaluating signals from the pressure sensor which is already present in such tank ventilation systems for leak testing of the lines and valves and also to limit the vacuum in the event of a faulty ventilation valve.
  • the tank ventilation valve is closed, the connection to the intake manifold of the internal combustion engine is therefore interrupted and the vacuum in the intake manifold cannot damage parts of the tank ventilation system.
  • the fuel tank 10 is connected via a ventilation line 11 to an activated carbon tank 12, in which the hydrocarbon vapors outgassing from the fuel tank 10 are adsorbed.
  • an activated carbon tank 12 in which the hydrocarbon vapors outgassing from the fuel tank 10 are adsorbed.
  • a regeneration line 13 which opens downstream of a throttle valve 14 into an intake manifold 15 of the internal combustion engine.
  • a flow control valve hereinafter referred to as a tank ventilation valve 16 is arranged.
  • a ventilation line 17 On the underside of the activated carbon canister 12 there is a ventilation line 17 which is connected to the ambient air and by means of an electromagnetic valve, hereinafter referred to as a ventilation valve 18 designated, can be locked.
  • This ventilation valve 18 and the tank ventilation valve 16 are connected via electrical lines to an electronic control unit 19 of the internal combustion engine.
  • a pressure sensor 20 is connected to the control unit 19 via an electrical line, which is arranged either on an upper part of a side wall or on the top of the fuel tank 10 and emits a signal corresponding to the pressure in the fuel tank.
  • Further control parameters that are required for operating the internal combustion engine such as the rotational speed N, the temperature of the coolant ⁇ , the throttle valve angle ⁇ and the air mass LM are also supplied to the control unit 19.
  • the load state of the internal combustion engine is recognized in the control unit 19 via these parameters. These parameters are further processed in such a way that a flushing of the activated carbon container 12 or a check of the tank ventilation system can be initiated if necessary.
  • the activated carbon filter in the container 12 is preferably regenerated in the part-load operation of the internal combustion engine.
  • the tank ventilation valve 16 is controlled (opened) via the control device 19, so that the negative pressure prevailing in the intake manifold 15 and dependent on the position of the throttle valve 14 propagates into the activated carbon container 12 via the tank ventilation valve 16.
  • the activated carbon can then absorb fuel vapor again.
  • the tank ventilation valve 16 is opened and the ventilation valve 18 closed via the control unit 19 when the internal combustion engine is operating and if the current load condition allows it.
  • the negative pressure present in the intake manifold 15 downstream of the throttle valve 14 builds up in the activated carbon canister 12 via the regeneration line 13 and propagates into the fuel tank 10 via the vent line 11.
  • the situation may arise in which the ventilation valve 18 no longer opens and this error is not recognized. This can be a mechanical fault in the ventilation valve 18 (terminals) and / or an electrical defect.
  • the pressure sensor 20 which is present anyway for the diagnosis of tightness of the tank ventilation system, is used. If the negative pressure in the fuel tank 10 exceeds a predeterminable value during the regeneration process, the tank ventilation valve 16 is closed via the control unit 19, and the connection to the intake manifold 15 is thus interrupted.
  • the faulty operation of the ventilation valve can also be indicated directly to the driver via an acoustic / optical display device, or this defect can be stored in a diagnostic memory in the control unit 19 and read out during maintenance of the motor vehicle by means of a stationary diagnostic device.
  • Either a differential pressure sensor which measures the differential pressure in the fuel tank relative to the atmospheric pressure or an absolute value pressure sensor are suitable as the pressure sensor.

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)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Claims (2)

  1. Procédé permettant de surveiller un dispositif de purge d'atmosphère de réservoir captant des vapeurs de carburant et les envoyant à un moteur à combustion interne, comprenant
    - un récipient (12) servant pour une adsorption des vapeurs de carburant,
    qui est relié au réservoir de carburant (10) par une conduite de purge d'atmosphère (11) et à une tubulure d'admission (15) du moteur à combustion interne par une conduite de régénération (13) et
    qui comporte une conduite de prise d'air (17) communiquant avec l'atmosphère et pouvant être fermée au moyen d'une valve de prise d'air (18),
    - une valve de purge d'atmosphère de réservoir (16) disposée dans la conduite de régénération (13), et
    - un capteur de pression (20) captant la pression de système du dispositif de purge d'atmosphère de réservoir,
    - la valve de purge d'atmosphère de réservoir (16) et la valve de prise d'air (18) étant commandées dans le sens de l'ouverture afin d'acheminer les vapeurs de carburant accumulées dans le récipient (12),
    - la pression de système étant surveillée au moyen du capteur de pression (20) pendant l'acheminement des vapeurs de carburant et
    - la valve de prise d'air (18) étant classée comme fonctionnant d'une manière défectueuse lorsqu'une valeur de seuil de pression préfixée est franchie,
       caractérisé en ce qu'ensuite, pour éviter une augmentation supplémentaire de pression dans le dispositif de purge d'atmosphère de réservoir, la valve de purge d'atmosphère de réservoir (16) est fermée.
  2. Procédé selon la revendication 1, caractérisé en ce qu'
    - un compteur de temps est mis en marche lors d'un franchissement de la valeur de seuil et
    - la valve de purge d'atmosphère de réservoir (16) est fermée lorsqu'une valeur finale de compteur pouvant être préfixée est atteinte.
EP93111691A 1993-07-21 1993-07-21 Procédé de contrÔle d'un système de dégazage d'un réservoir captant des vapeurs d'essence et les introduisant dans un moteur à combustion interne Expired - Lifetime EP0635633B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE59307433T DE59307433D1 (de) 1993-07-21 1993-07-21 Verfahren zum Überwachen einer Kraftstoffdämpfe auffangenden und einer Brennkraftmaschine zuleitenden Tankentlüftungsanlage
EP93111691A EP0635633B1 (fr) 1993-07-21 1993-07-21 Procédé de contrÔle d'un système de dégazage d'un réservoir captant des vapeurs d'essence et les introduisant dans un moteur à combustion interne
JP6187898A JPH0734987A (ja) 1993-07-21 1994-07-19 燃料蒸気を捕集して内燃機関に供給するタンク通気装置の監視法
US08/278,272 US5499613A (en) 1993-07-21 1994-07-21 Method for monitoring a tank venting system that traps fuel vapors and feeds them to an internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP93111691A EP0635633B1 (fr) 1993-07-21 1993-07-21 Procédé de contrÔle d'un système de dégazage d'un réservoir captant des vapeurs d'essence et les introduisant dans un moteur à combustion interne

Publications (2)

Publication Number Publication Date
EP0635633A1 EP0635633A1 (fr) 1995-01-25
EP0635633B1 true EP0635633B1 (fr) 1997-09-24

Family

ID=8213097

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93111691A Expired - Lifetime EP0635633B1 (fr) 1993-07-21 1993-07-21 Procédé de contrÔle d'un système de dégazage d'un réservoir captant des vapeurs d'essence et les introduisant dans un moteur à combustion interne

Country Status (4)

Country Link
US (1) US5499613A (fr)
EP (1) EP0635633B1 (fr)
JP (1) JPH0734987A (fr)
DE (1) DE59307433D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020203214A1 (de) 2020-03-12 2021-09-16 Vitesco Technologies GmbH Verfahren und Vorrichtung zur Überwachung des Tankentlüftungssystems eines Kraftfahrzeugs

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3272183B2 (ja) * 1995-03-03 2002-04-08 本田技研工業株式会社 内燃エンジンの蒸発燃料処理装置
JPH1130158A (ja) * 1997-05-12 1999-02-02 Denso Corp 蒸発燃料蒸散防止装置
DE19830234C2 (de) * 1998-07-07 2000-06-08 Daimler Chrysler Ag Verfahren zum Prüfen einer Tankanlage in einem Kraftfahrzeug auf Dichtheit
JP3558555B2 (ja) * 1999-06-30 2004-08-25 株式会社日立ユニシアオートモティブ 蒸発燃料処理装置のリーク診断装置
JP2001182629A (ja) * 1999-12-27 2001-07-06 Fuji Heavy Ind Ltd エバポパージシステムの診断装置および圧力センサ
JP3664074B2 (ja) * 2000-11-27 2005-06-22 株式会社デンソー エバポガスパージシステムの異常診断装置
DE10209432B4 (de) * 2002-03-05 2004-02-19 Robert Bosch Gmbh Verfahren zur Funktionsprüfung einer Tankentlüftungsanlage
US6959696B2 (en) * 2002-04-12 2005-11-01 Briggs & Stratton Corporation Internal combustion engine evaporative emission control system
US6892711B2 (en) * 2002-11-25 2005-05-17 Ford Global Technologies, Llc Inline fuel cooling of the carbon canister
DE102010038147A1 (de) * 2010-10-13 2012-04-19 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Verfahren zum Betreiben eines Hybridfahrzeugs
FR3094676B1 (fr) 2019-04-02 2021-03-05 Plastic Omnium Advanced Innovation & Res Dispositif limitant la pollution atmosphérique générée par l’évaporation dans l’atmosphère du carburant contenu dans un réservoir

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JPH0623736Y2 (ja) * 1988-08-10 1994-06-22 トヨタ自動車株式会社 内燃機関のエバポパージ異常検出装置
DE4003751C2 (de) * 1990-02-08 1999-12-02 Bosch Gmbh Robert Tankentlüftungsanlage für ein Kraftfahrzeug und Verfahren zum Überprüfen deren Funktionstüchtigkeit
DE4012111C1 (fr) * 1990-04-14 1991-03-07 Audi Ag, 8070 Ingolstadt, De
DE4030948C1 (en) * 1990-09-29 1991-10-17 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De Monitoring removal of petrol vapour from IC engine fuel tank - detecting change in fuel-air mixt. composition during selected working conditions
US5191870A (en) * 1991-03-28 1993-03-09 Siemens Automotive Limited Diagnostic system for canister purge system
GB2254318B (en) * 1991-04-02 1995-08-09 Nippon Denso Co Abnormality detecting apparatus for use in fuel transpiration preventing system
DE4111361A1 (de) * 1991-04-09 1992-10-15 Bosch Gmbh Robert Tankentlueftungsanlage sowie verfahren und vorrichtung zu deren ueberpruefung
JP2748723B2 (ja) * 1991-06-10 1998-05-13 トヨタ自動車株式会社 エバポパージシステムの故障診断装置
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
US5275144A (en) * 1991-08-12 1994-01-04 General Motors Corporation Evaporative emission system diagnostic
US5261379A (en) * 1991-10-07 1993-11-16 Ford Motor Company Evaporative purge monitoring strategy and system
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US5315980A (en) * 1992-01-17 1994-05-31 Toyota Jidosha Kabushiki Kaisha Malfunction detection apparatus for detecting malfunction in evaporative fuel purge system
US5355864A (en) * 1992-01-20 1994-10-18 Honda Giken Kogyo Kabushiki Kaisha Evaporative fuel-processing system for internal combustion engines
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
JP2759908B2 (ja) * 1992-07-24 1998-05-28 本田技研工業株式会社 内燃エンジンの蒸発燃料処理装置
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020203214A1 (de) 2020-03-12 2021-09-16 Vitesco Technologies GmbH Verfahren und Vorrichtung zur Überwachung des Tankentlüftungssystems eines Kraftfahrzeugs
DE102020203214B4 (de) 2020-03-12 2021-09-30 Vitesco Technologies GmbH Verfahren und Vorrichtung zur Überwachung des Tankentlüftungssystems eines Kraftfahrzeugs

Also Published As

Publication number Publication date
DE59307433D1 (de) 1997-10-30
JPH0734987A (ja) 1995-02-03
EP0635633A1 (fr) 1995-01-25
US5499613A (en) 1996-03-19

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