WO2001073283A1 - Systeme de ventilation de reservoir d'automobile et procede permettant de l'actionner - Google Patents

Systeme de ventilation de reservoir d'automobile et procede permettant de l'actionner Download PDF

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Publication number
WO2001073283A1
WO2001073283A1 PCT/DE2001/001141 DE0101141W WO0173283A1 WO 2001073283 A1 WO2001073283 A1 WO 2001073283A1 DE 0101141 W DE0101141 W DE 0101141W WO 0173283 A1 WO0173283 A1 WO 0173283A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
tank ventilation
shut
tank
internal combustion
Prior art date
Application number
PCT/DE2001/001141
Other languages
German (de)
English (en)
Inventor
Thorsten Fritz
Dieter Lederer
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 WO2001073283A1 publication Critical patent/WO2001073283A1/fr

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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

Definitions

  • Tank ventilation system for a motor vehicle and method for operating such
  • the invention first relates to a tank ventilation system for a motor vehicle according to the preamble of claim 1.
  • Such a tank ventilation system can be seen, for example, from DE 40 03 751 AI.
  • a method for leak testing of such a tank ventilation system is known for example from DE 196 36 431 AI or from DE 198 09 384 AI.
  • tank ventilation valve In known tank ventilation systems, fuel that is outgassed from the tank is supplied to the internal combustion engine in which it is burned by opening the tank ventilation valve (TEV).
  • TEV tank ventilation valve
  • the tank ventilation valve is optimized for its flow properties, but not for its tightness when closed. A significant reduction or even complete elimination of a leak in the tank ventilation valve can be disadvantageous with regard to the further optimization of the flow properties of the tank ventilation valve.
  • the object of the invention is therefore to further develop a tank ventilation system for a motor vehicle in such a way that leaks in the tank ventilation valve can be avoided while at the same time having optimal flow properties of this valve.
  • a controllable shut-off means is arranged in series with the tank ventilation valve.
  • This controllable shut-off device improves the sealing of the tank system, especially when the tank ventilation valve is closed.
  • this shut-off means forms a single structural unit with the tank ventilation valve.
  • shut-off means is a separate valve which is arranged in the valve line between the internal combustion engine and the tank ventilation valve.
  • the shut-off means can also be a separate valve which is arranged in the valve line between the tank ventilation valve and the activated carbon filter.
  • the maximum flow of the shut-off valve is advantageously at least as large as the maximum flow of the tank ventilation valve.
  • the invention further relates to a method for controlling such a shut-off valve of a tank ventilation system.
  • a method for controlling such a shut-off valve of a tank ventilation system is based on the problem of actuating the shut-off valve in connection with the tank ventilation valve in such a way that on the one hand the function of the tank ventilation system is not impaired and on the other hand optimal leak tests are possible.
  • This problem is solved by the shut-off valve in the following operating states:
  • Fig. 1 shows schematically a tank ventilation system making use of the invention
  • An exemplary embodiment of a tank ventilation system of a soft vehicle shown in FIG. 1, comprises a tank 10, an adsorption filter 20, for example an activated carbon filter, which is connected to the tank 10 via a filter line 12 and has a ventilation line 22 which can be connected to the environment, and a tank ventilation valve 30, which can be connected on the one hand to the adsorption filter 20 via a valve line 24 and on the other hand to an intake manifold 40 of an internal combustion engine 44 via a valve line 42.
  • a shut-off valve 90 which can be controlled by a circuit unit 60, is arranged in the valve line 42 and will be discussed in more detail below.
  • a pump 50 is provided which is driven, for example, by an electric motor (not shown).
  • the pump is controlled by the circuit unit 60.
  • a switch valve 70 is connected downstream of the pump 50, for example in the form of a 3/2-way valve, as shown in FIG. 1.
  • a reference leak 81 is arranged in a separate branch 80.
  • the size of the reference leak 81 is selected so that it corresponds to the size of a leak to be detected.
  • This reference leak can for example also be part of the changeover valve 70, for example due to a channel narrowing or the like, so that in this case an additional reference branch 80 can be omitted (not shown).
  • the pump 50 is actuated and an alternating pressure is introduced into the tank ventilation system and - by switching the valve 70 - into the reference leak 81.
  • the current I M to be supplied to the pump motor which flows through a resistor R M in the event of a voltage drop, is detected and supplied to the circuit unit 60.
  • the tightness of the tank ventilation system can be concluded in a manner known per se and explained, for example, in DE 196 36 431 AI or DE 198 09 384 AI, to which reference is made here.
  • Any leakage that may occur at the tank ventilation valve 30 would now disrupt such a leak test, for example.
  • a leak in the tank vent tion valve 30 would also adversely affect the overall emissions of a vehicle.
  • shut-off valve 90 is provided, which can be controlled by the circuit unit 60.
  • This shut-off valve 90 is optimized with regard to its shut-off properties, whereas the tank ventilation valve 30 is optimized with regard to its flow-through properties, but not with regard to its shut-off properties.
  • the shut-off valve 90 can, for example, as shown in FIG. 1, be arranged between the internal combustion engine 44 and the tank ventilation valve 30, but it can also be arranged between the tank ventilation valve 30 and the activated carbon filter 20 (not shown). Finally, it can also form a structural unit with the tank ventilation valve 30.
  • the shut-off valve 90 is designed such that its maximum flow in the open state corresponds at least to the maximum flow in the tank ventilation valve 30 in its fully open state.
  • shutoff valve 90 There are several ways to control the shutoff valve 90.
  • a first exemplary embodiment of a method for controlling the shut-off valve 90 shown in Fig. 2, it is checked in step 201 whether there is a leak test. If this is the case, the shut-off valve 90 is closed (step 202); if this is not the case, it is opened (step 205). Both after step 202 "Close” and after step 205 "Open", the query is made as to whether there is a leak test (step 201) again. In other words, the process steps are run through cyclically, with a continuous check being carried out to determine whether there is a leak test.
  • step 301 it is first checked in step 301 whether there is a leak test. If this is the case, the shut-off valve 90 is closed (step 302). If this is not the case, it is checked whether the internal combustion engine has come to a standstill. If this is the case, the shut-off valve 90 is closed (step 302), if this is not the case, the shut-off valve 90 is opened (step 305).
  • the queries as to whether there is a leak test or a shutdown of the internal combustion engine are run through cyclically, so that after closing (step 302) and after opening (step 305) the shut-off valve 90, steps 301 (query whether a leak test is present) is present) and 303 (query whether the internal combustion engine is at a standstill) are run through again.
  • the shut-off valve 90 is therefore closed both during a leak test and when the internal combustion engine is at a standstill.
  • a third embodiment of the method according to the invention shown in FIG. 4, it is first checked in a step 401 whether there is a leak test. If so, the shutoff valve 90 is closed in step 402.
  • step 403 it is checked in a step 403 whether the internal combustion engine has come to a standstill. If this is the case, the shut-off valve 90 is closed; if this is not the case, a check is carried out in a step 404 to determine whether tank ventilation is taking place. If this is not the case, the shut-off valve 90 is closed again, but if this is the case it is opened.
  • the shut-off valve 90 is therefore closed in other words:
  • the advantage of the tank ventilation system described above and the method for controlling the shut-off valve 90 of this tank ventilation system lies in the simple technical implementation.
  • existing tank ventilation systems can be retrofitted with simple construction measures.
  • the tank ventilation system and the method for controlling the shut-off valve 90 connected in series with the tank ventilation valve 30 enable on the one hand an increase in the selectivity of the leak test, and on the other hand prevent outgassing of harmful fuel vapors into the environment when the tank ventilation valve 30 leaks.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

L'invention concerne un système de ventilation de réservoir d'automobile, comprenant un réservoir de carburant (10), un filtre d'adsorption (20) qui est relié au réservoir de carburant (10) par l'intermédiaire d'une conduite filtrante (12) et présente une conduite de ventilation (22), ainsi qu'une soupape de ventilation de réservoir (30) qui est reliée à la tubulure d'admission (40) d'un moteur à combustion interne (44) par l'intermédiaire de conduites de soupape (24,42). Ce système de ventilation de réservoir se caractérise en ce qu'un élément d'arrêt (90) régulable est monté à la suite de la soupape de ventilation de réservoir (30).
PCT/DE2001/001141 2000-03-24 2001-03-23 Systeme de ventilation de reservoir d'automobile et procede permettant de l'actionner WO2001073283A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2000114739 DE10014739A1 (de) 2000-03-24 2000-03-24 Tankentlüftungsanlage für ein Kraftfahrzeug und Verfahren zum Betreiben einer solchen
DE10014739.9 2000-03-24

Publications (1)

Publication Number Publication Date
WO2001073283A1 true WO2001073283A1 (fr) 2001-10-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2001/001141 WO2001073283A1 (fr) 2000-03-24 2001-03-23 Systeme de ventilation de reservoir d'automobile et procede permettant de l'actionner

Country Status (2)

Country Link
DE (1) DE10014739A1 (fr)
WO (1) WO2001073283A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1361100A2 (fr) * 2002-05-10 2003-11-12 Eaton Corporation Système et procédé pour la surveillance des fuites dans une commande d'émission des vapeurs de carburant
US6889667B2 (en) 2002-03-05 2005-05-10 Robert Bosch Gmbh Tank-venting system in a motor vehicle and method for checking the operability of the tank-venting system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10209432B4 (de) * 2002-03-05 2004-02-19 Robert Bosch Gmbh Verfahren zur Funktionsprüfung einer Tankentlüftungsanlage
US8122758B2 (en) * 2008-02-21 2012-02-28 GM Global Technology Operations LLC Purge valve leak diagnostic systems and methods

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3008320A1 (de) * 1979-03-08 1980-09-18 Nissan Motor Abgabeanlage fuer verfluechtigten kraftstoff
JPS58133466A (ja) * 1982-02-01 1983-08-09 Toyota Motor Corp 内燃機関の燃料蒸発ガス制御装置
EP0357882A2 (fr) * 1988-09-09 1990-03-14 Firma Carl Freudenberg Dispositif pour alimenter le tuyau d'admission d'un moteur à combustion interne en quantités dosées de composants volatils de carburants
DE3932062A1 (de) * 1989-09-26 1991-04-04 Holzer Walter Umweltfreundlicher brennstofftank
DE4003751A1 (de) 1990-02-08 1991-08-14 Bosch Gmbh Robert Tankentlueftungsanlage fuer ein kraftfahrzeug und verfahren zum ueberpruefen deren funktionstuechtigkeit
US5195495A (en) * 1991-08-02 1993-03-23 Honda Giken Kogyo Kabushiki Kaisha Evaporative fuel-purging control system for internal combustion engines
US5398660A (en) * 1992-06-03 1995-03-21 Nippondenso Co. Fuel vapor purging system
US5542397A (en) * 1994-05-09 1996-08-06 Nissan Motor Co., Ltd. Leak test system for vaporized fuel treatment mechanism
US5636617A (en) * 1994-07-11 1997-06-10 Nissan Motor Co., Ltd. Engine fuel vapor processor
DE19636431A1 (de) 1996-09-07 1998-03-12 Bosch Gmbh Robert Verfahren und Vorrichtung zur Prüfung der Funktionsfähigkeit einer Tankentlüftungsanlage
EP0840002A2 (fr) * 1996-11-04 1998-05-06 Daimler-Benz Aktiengesellschaft Système d'aération d'un réservoir pour véhicule à moteur à combustion
DE19748862A1 (de) * 1996-11-05 1998-06-10 Nissan Motor Diagnoseeinrichtung für eine Kraftstoffdampf-Bearbeitungsvorrichtung
US5767395A (en) * 1995-07-14 1998-06-16 Nissan Motor Co., Ltd. Function diagnosis apparatus for evaporative emission control system
DE19809384A1 (de) 1998-03-05 1999-09-09 Bosch Gmbh Robert Verfahren zur Prüfung der Funktionsfähigkeit einer Tankentlüftungsanlage

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3008320A1 (de) * 1979-03-08 1980-09-18 Nissan Motor Abgabeanlage fuer verfluechtigten kraftstoff
JPS58133466A (ja) * 1982-02-01 1983-08-09 Toyota Motor Corp 内燃機関の燃料蒸発ガス制御装置
EP0357882A2 (fr) * 1988-09-09 1990-03-14 Firma Carl Freudenberg Dispositif pour alimenter le tuyau d'admission d'un moteur à combustion interne en quantités dosées de composants volatils de carburants
DE3932062A1 (de) * 1989-09-26 1991-04-04 Holzer Walter Umweltfreundlicher brennstofftank
DE4003751A1 (de) 1990-02-08 1991-08-14 Bosch Gmbh Robert Tankentlueftungsanlage fuer ein kraftfahrzeug und verfahren zum ueberpruefen deren funktionstuechtigkeit
US5195495A (en) * 1991-08-02 1993-03-23 Honda Giken Kogyo Kabushiki Kaisha Evaporative fuel-purging control system for internal combustion engines
US5398660A (en) * 1992-06-03 1995-03-21 Nippondenso Co. Fuel vapor purging system
US5542397A (en) * 1994-05-09 1996-08-06 Nissan Motor Co., Ltd. Leak test system for vaporized fuel treatment mechanism
US5636617A (en) * 1994-07-11 1997-06-10 Nissan Motor Co., Ltd. Engine fuel vapor processor
US5767395A (en) * 1995-07-14 1998-06-16 Nissan Motor Co., Ltd. Function diagnosis apparatus for evaporative emission control system
DE19636431A1 (de) 1996-09-07 1998-03-12 Bosch Gmbh Robert Verfahren und Vorrichtung zur Prüfung der Funktionsfähigkeit einer Tankentlüftungsanlage
EP0840002A2 (fr) * 1996-11-04 1998-05-06 Daimler-Benz Aktiengesellschaft Système d'aération d'un réservoir pour véhicule à moteur à combustion
DE19748862A1 (de) * 1996-11-05 1998-06-10 Nissan Motor Diagnoseeinrichtung für eine Kraftstoffdampf-Bearbeitungsvorrichtung
DE19809384A1 (de) 1998-03-05 1999-09-09 Bosch Gmbh Robert Verfahren zur Prüfung der Funktionsfähigkeit einer Tankentlüftungsanlage

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 007, no. 246 (M - 253) 2 November 1983 (1983-11-02) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6889667B2 (en) 2002-03-05 2005-05-10 Robert Bosch Gmbh Tank-venting system in a motor vehicle and method for checking the operability of the tank-venting system
DE10209483B4 (de) * 2002-03-05 2006-07-06 Robert Bosch Gmbh Verfahren zur Prüfung der Funktionsfähigkeit einer Tankentlüftungsanlage und Tankentlüftungsanlagen bei Kraftfahrzeugen
EP1361100A2 (fr) * 2002-05-10 2003-11-12 Eaton Corporation Système et procédé pour la surveillance des fuites dans une commande d'émission des vapeurs de carburant
EP1361100A3 (fr) * 2002-05-10 2006-12-06 Eaton Corporation Système et procédé pour la surveillance des fuites dans une commande d'émission des vapeurs de carburant

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