EP1183456B1 - Verfahren und vorrichtung zum emissionsarmen betrieb einer brennstofftankanlage insbesondere eines kraftfahrzeuges - Google Patents
Verfahren und vorrichtung zum emissionsarmen betrieb einer brennstofftankanlage insbesondere eines kraftfahrzeuges Download PDFInfo
- Publication number
- EP1183456B1 EP1183456B1 EP01913544A EP01913544A EP1183456B1 EP 1183456 B1 EP1183456 B1 EP 1183456B1 EP 01913544 A EP01913544 A EP 01913544A EP 01913544 A EP01913544 A EP 01913544A EP 1183456 B1 EP1183456 B1 EP 1183456B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel tank
- tank system
- pressure
- motor vehicle
- fuel
- 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
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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 present invention relates generally to control devices for monitoring the emission of fuel vapors in motor vehicles.
- the invention relates to a method and a device for operating a fuel tank system of a Motor vehicle, in particular for carrying out a temporary leak test of the fuel tank system, when an activated carbon filter for intake of in the fuel tank system formed gas or vapor Fuel is provided.
- the control device is used in particular, approximately occurring Capture fuel vapor by means of an activated carbon filter and this temporarily in the activated carbon filter save.
- Volatile fuel vapors that are mostly hydrocarbon vapors, for example, form during a refueling operation of the vehicle or due to an increasing fuel temperature in the tank and a concomitant increase in the Fuel vapor pressure.
- the storage capacity of the activated carbon filter is now decreasing with increasing amount of stored hydrocarbon steadily and therefore it is necessary the activated carbon filter to regenerate at regular intervals, i.e. the stored hydrocarbon from this to dissolve again.
- the activated carbon filter via a regeneration valve with a suction of combustion air serving intake manifold of the internal combustion engine connected. By opening the regeneration valve thus creates a pressure gradient between the Activated carbon filter and the intake manifold, by means of which the hydrocarbon stored in the activated carbon filter is guided into the suction pipe to ultimately in the Internal combustion engine burned and disposed of.
- the negative pressure but also 'active' means the internal combustion engine are generated, wherein the Tank or the entire fuel tank system with the Suction tube briefly brought into pressure-conductive connection becomes, whereby in the tank a the intake manifold pressure corresponding negative pressure builds up.
- the tank or the entire fuel tank system with the Suction tube briefly brought into pressure-conductive connection becomes, whereby in the tank a the intake manifold pressure corresponding negative pressure builds up.
- U.S. Patent No. 5,146,902 discloses a method and a device described in which, in Contrary to the two previous examples, a Overpressure is generated in the tank and the leak diagnosis Fall of this overpressure is checked.
- the known generic methods and devices have the disadvantage that in the presence of a leak or a leakage of the fuel tank after an approximately done warming of the fuel tank and so that the tank contents creates an overpressure, which in addition that leads through the leak hydrocarbon Gas or steam from the fuel tank system, on the activated carbon filter past, flows into the environment.
- This is in a motor vehicle especially the case if this overpressure occurs during a shutdown phase of the vehicle, since in this case the excess Gas or the steam is not active by means of a motor-driven pump or one by the motor self-induced vacuum (e.g., via a suction pipe) can be sucked off.
- the respective physical State variable i. the temperature and / or the pressure
- the fuel tank system only then gas or vapor-tight is completed when a predetermined negative temperature gradient between the Outside temperature (temperature outside the vehicle) and the internal temperature of the fuel tank detected becomes. Because in this case is with a vacuum build-up in the fuel tank, which is an "outgassing" of hydrocarbons by any existing Leak effectively prevented.
- a gas or vapor-tight closing the fuel tank system or the fuel tank is prevented, if a negative pressure gradient between the internal pressure the fuel tank system or the fuel tank and the outside pressure measured outside the vehicle is recognized or predicted.
- a minimum waiting period between a recognized tank process and the gas or vapor-tight Completing the fuel tank system specified become.
- a refueling process can by means of a tank lid lock or the like sensed become. This will avoid the fuel tank system with very fresh fuel that is strong tends to outgassing, closed too early gas or vapor-tight which is also an overpressure build-up would lead.
- the invention also proposed device In particular, it has a first sensor which detects a shutdown of the motor vehicle, on.
- a first sensor which detects a shutdown of the motor vehicle, on.
- An imminent parking of the vehicle for example, by turning off of the engine or, in the run-up to engine shutdown, about switching off the vehicle lighting detected or predicted at detected darkness of the environment become. Also, the condition of the driver's door (Open-close with the engine stopped) at the meeting of Prediction be used.
- the device has Further, a second sensor, which is a gas or vapor-related physical state variable in the interior of the Fuel tank system and in the vicinity of the motor vehicle detected.
- a computing unit which one after the parking of the motor vehicle expected gas or vapor pressure in the fuel tank system, taking into account the difference of determined physical state variables, predicts.
- control means are provided, which supply the gas or vaporous fuel, in case of expected Overpressure in particular of the gaseous or vaporous Fuel in the fuel tank plant opposite a corresponding pressure in the environment of the motor vehicle, via the activated carbon filter from the fuel tank system lead into the environment of the motor vehicle.
- expected negative pressure in particular of gaseous or vaporous fuel in the Fuel tank system against the corresponding pressure in the vicinity of the motor vehicle, however, the Fuel tank system sealed gas or vapor-tight. In the latter case, in particular a leak test the fuel tank system by means of the negative pressure allows.
- the device according to the invention can also be a or several cooperating with the arithmetic unit Temperature sensors for detecting the temperature in the Fuel tank system and / or the temperature in the environment of the vehicle.
- Temperature sensors for detecting the temperature in the Fuel tank system and / or the temperature in the environment of the vehicle.
- pressure sensors can be used to detect the pressure in the Fuel tank system and / or the pressure in the environment be provided of the vehicle.
- the device between the activated carbon filter and one for temporary rinsing of the activated carbon filter provided filter arranged bistable valve, in particular de-energized bistable solenoid valve, on.
- bistable valve in particular de-energized bistable solenoid valve
- One such valve fulfills the above-described invention Requirements for the gas flow or steam flow control in a particularly efficient way.
- used solenoid valves in the non-energized Operating state are closed, that persists
- proposed valve de-energized in the respectively present opening state i. either in the closed or in the open state. Only for switching between these two states, both in one way and the other, one becomes Current pulse needed.
- This valve will during a detected parking phase of the vehicle so controlled that it is only the fuel tank system to the outside gas-tight or vapor-tight when the ambient conditions the formation of a negative pressure in the Expect tank or in the fuel tank system. In the other cases, however, the valve is opened, to thereby equalize the pressure between the tank and the environment-unhindered over the activated carbon filter too enable.
- the schematic block diagram in Fig. 1 shows a in The prior art known control device 10 for Monitoring the emission of fuel vapors in one Motor vehicle (not shown).
- the control device shows a pump and valve assembly 11 to Leak diagnosis and an activated carbon filter 12, the connected via a pipe 13 pressure-conducting together are.
- a fuel storage tank 14 is by means of an overflow and steam flow control valve 15 and via a pipeline 16 with the activated carbon filter 12 connected.
- a suction pipe 17 of a (not shown here) Internal combustion engine is also via a pipe 18 connected to the activated carbon filter 12 pressure-conducting.
- the control device points in the course of the pipeline 18, in the vicinity of the suction pipe 17, a regeneration valve 19 on.
- control unit 20 is provided, with the pump and valve assembly 11th is electrically connected and to control the arrangement 11 and the regeneration valve 19 is used. Further contains the controller 10 a passive filter 21, the arrangement 11 with atmosphere, i. the environment of the vehicle, pressure-conducting connects.
- Fig. 2 shows a schematic detail enlargement a known in the prior art embodiment the pump and valve arrangement already shown in Fig. 1 11, in an embodiment in which a leak test by means of a natural vacuum method he follows.
- a solenoid valve 30 is only energized and open during engine operation, so one the largest possible cable cross-section for flushing of the activated carbon filter 12. When turned off Motor, the solenoid valve 30 is normally closed.
- passive safety valves 'Vacuum Relief' 31 and 'Pressure Relief' 32 provided, the with only slight pressure differences between the Fuel tank system, in particular the fuel storage tank 14 and the pipeline 16, and the environment of the vehicle (atmosphere) are closed.
- Fig. 3 shows a device according to the invention in one of Fig. 1 similar block diagram.
- the pump and valve assembly 11 has the device according to the invention a pump and valve assembly 11, an activated carbon filter 12, a fuel storage tank 14, a Control device 20, and corresponding, not here Closer with reference numbers provided piping on.
- the pump and valve assembly 11 also safety valves 31, 32 and a Pressure switch 33 on.
- a de-energized bistable solenoid valve 40 This remains de-energized both in the closed and in the open state. Only to toggle between these two states a current pulse is needed.
- That's bistable Solenoid valve 40 is connected via an electrical line 41 connected to the control unit 20 and is connected via a Control module 42, for example a corresponding program code, driven.
- the control unit 20 is also via electrical lines 43, 44 with an inside the fuel tank 14 arranged pressure sensor 45 and arranged with an outside of the vehicle Pressure sensor 46 connected.
- the two pressure sensors 45, 46 can also be used temperature sensors or pressure sensors in combination with temperature sensors.
- the pressure sensors 45, 46 deliver over the Lines 43, 44 pressure signals to the control unit 20.
- the bistable solenoid valve 40 is opened, around the excess fuel vapor, accordingly the flow direction 47, over the activated carbon filter 12 from the fuel tank 14 in the vicinity of the To lead vehicle.
- expected negative pressure becomes or remains the bistable solenoid valve 40, however, closed, creating a leak test the fuel tank system by means of a negative pressure can.
- fresh air are passed into the activated carbon filter 12 may, to the already described rinsing for the purpose the regeneration of the activated carbon filter 12 perform.
- the internal tank pressure and the vehicle external pressure detected 52 Once it is recognized that one Stopping phase is present, the internal tank pressure and the vehicle external pressure detected 52. Alternatively or additionally can corresponding indoor or outdoor temperatures be recorded.
- the captured print data will be compared 53 and made a prediction if one Internal tank pressure is expected to be 54, which is higher than that External pressure.
- the solenoid valve 40 is opened 56 and then go through a waiting loop 57.
- a waiting loop 57 is avoided that a Overpressure develops as long as the fuel is still due a previous sloshing of the fuel outgas in the fuel tank.
- the solenoid valve 40 is closed 58 to then, if necessary, perform a leak test 59th
- a leak test only in the case of the presence of a pressure gradient between the outside world and the tank interior carried out, if necessary outside air through the leak in the fuel tank can flow. This can be emissions to avoid fuel vapors very effectively.
- the expected internal tank pressure is higher than the expected or present ambient pressure is checked 60, whether the solenoid valve is already open. If not, the solenoid valve 40 is opened to the excess Fuel vapor over the activated carbon filter 12th from the fuel tank 14 in the vicinity of the To lead vehicle.
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- 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)
- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
Description
- Fig. 1
- zeigt, in schematischer Darstellung, eine Kontrolleinrichtung zur Überwachung der Emission von Kraftstoffdämpfen in einem Kraftfahrzeug nach dem Stand der Technik;
- Fig. 2
- zeigt, in Ausschnittvergrößerung, eine im Stand der Technik bekannte Ausführung der in Fig. 1 gezeigten Pumpen- und Ventilanordnung, und zwar zur Dichtheitsprüfung mittels Unterdrucktechnik;
- Fig. 3
- zeigt eine erfindungsgemäße Vorrichtung in einer der Fig. 1 ähnlichen Blockdarstellung; und
- Fig. 4
- ein Flussdiagramm zur Illustration einer bevorzugten Ausgestaltung des erfindungsgemäßen Verfahrens.
Claims (10)
- Verfahren zum Betrieb einer Brennstofftankanlage (10) eines Kraftfahrzeugs, insbesondere zur Durchführung einer zeitweiligen Dichtheitsprüfung der Brennstofftankanlage (10), wobei ein Aktivkohlefilter (12) zur Aufnahme von in der Brennstofftankanlage (10) gebildetem gas- oder dampfförmigem Brennstoff vorgesehen ist,
gekennzeichnet durch die Schritte:a) Erfassen eines Abstellvorgangs des Kraftfahrzeugs;b) Erfassen (52) mindestens einer gas- oder dampfbezogenen physikalischen Zustandsgröße im Innern des Brennstofftankanlage (10) und in der Umgebung des Kraftfahrzeugs;c) Vorhersagen (54) eines nach dem Abstellen der Kraftfahrzeugs zu erwartenden Gas- oder Dampfdrucks in der Brennstofftankanlage (10) unter Berücksichtigung des Unterschieds der in Schritt b) ermittelten physikalischen Zustandsgrößen;
im Falle eines zu erwartenden Überdrucks insbesondere des gas- oder dampfförmigen Brennstoffes in der Brennstofftankanlage (10) gegenüber einem entsprechenden Druck in der Umgebung des Kraftfahrzeugs:d1) Leiten (61) des gas- oder dampfförmigen Brennstoffes über das Aktivkohlefilter (12) aus der Brennstofftankanlage (10) in die Umgebung des Kraftfahrzeugs;
und
im Falle eines zu erwartenden Unterdrucks insbesondere des gas- oder dampfförmigen Brennstoffes in der Brennstofftankanlage (10) gegenüber dem entsprechenden Druck in der Umgebung des Kraftfahrzeugs:d2) Gas- oder dampfdichtes Abschließen (58) der Brennstofftankanlage (10), insbesondere zur Ermöglichung einer Dichtheitsprüfung (59) der Brennstofftankanlage (10) mittels des Unterdrucks. - Verfahren nach Anspruch 1, gekennzeichnet durch einen insbesondere vor Schritt a) erfolgenden weiteren Schritt:Erfassen (51) eines bevorstehenden Abstellens des Kraftfahrzeuges.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass als physikalische Zustandsgröße die Temperatur in der Brennstofftankanlage und/oder die Temperatur in der Umgebung des Fahrzeuges erfasst wird bzw. erfasst werden.
- Verfahren nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass als physikalische Zustandsgröße der Druck in der Brennstofftankanlage und/oder der Druck in der Umgebung des Fahrzeuges erfasst wird bzw. erfasst werden (52).
- Verfahren nach einem oder mehreren der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass eine kurze Zeitspanne zwischen einem erkannten Abstellen des Fahrzeuges oder einem erkannten Betankungsvorgang der Brennstofftankanlage und dem gas- bzw. dampfdichten Abschließen der Brennstofftankanlage vorgegeben wird (57).
- Vorrichtung zum Betrieb einer Brennstofftankanlage (10) eines Kraftfahrzeugs, insbesondere zur Durchführung einer zeitweiligen Dichtheitsprüfung der Brennstofftankanlage (10), die ein Aktivkohlefilter (12) zur Aufnahme von in der Brennstofftankanlage (10) gebildetem gas- oder dampfförmigem Brennstoff aufweist, gekennzeichnet durch mindestens einen ersten Sensor, welcher einen Abstellvorgang des Kraftfahrzeugs erfasst, mindestens einen zweiten Sensor (45, 46), welcher wenigstens eine gas- oder dampfbezogene physikalische Zustandsgröße im Innern der Brennstofftankanlage (10) und in der Umgebung des Kraftfahrzeugs erfasst;
eine Recheneinheit (42), welche einen nach dem Abstellen des Kraftfahrzeugs zu erwartenden Gas- oder Dampfdrucks in der Brennstofftankanlage (10) unter Berücksichtigung des Unterschieds der ermittelten physikalischen Zustandsgrößen vorhersagt;
Steuermittel (20), welche den gas- oder dampfförmigen Brennstoff, im Falle eines zu erwartenden Überdrucks insbesondere des gas- oder dampfförmigen Brennstoffs in der Brennstofftankanlage (10) gegenüber einem entsprechenden Druck in der Umgebung des Kraftfahrzeugs, über das Aktivkohlefilter (12) aus der Brennstofftankanlage (10) in die Umgebung des Kraftfahrzeugs leiten und/oder die Brennstofftankanlage (10), im Falle eines zu erwartenden Unterdrucks insbesondere des gas- oder dampfförmigen Brennstoffs in der Brennstofftankanlage (10) gegenüber dem entsprechenden Druck in der Umgebung des Kraftfahrzeugs, gas- oder dampfdicht abschließen, insbesondere zur Ermöglichung einer Dichtheitsprüfung der Brennstofftankanlage (10) mittels des Unterdrucks. - Vorrichtung nach Anspruch 6, gekennzeichnet durch mit der Recheneinheit (42) zusammenarbeitende Mittel zum Erfassen eines bevorstehenden Abstellens des Kraftfahrzeuges.
- Vorrichtung nach Anspruch 6 oder 7, gekennzeichnet durch mindestens einen mit der Recheneinheit (42) zusammenarbeitenden Temperatursensor (45, 46) zur Erfassung der Temperatur in der Brennstofftankanlage (10), insbesondere im Brennstofftank (14), und/oder der Temperatur in der Umgebung des Fahrzeuges.
- Vorrichtung nach einem oder mehreren der Ansprüche 6 bis 8, gekennzeichnet durch mindestens einen mit der Recheneinheit (42) zusammenarbeitenden Drucksensor (45, 46) zur Erfassung des Druckes in der Brennstofftankanlage (10), insbesondere im Brennstofftank (14), und/oder des Druckes in der Umgebung des Fahrzeuges.
- Vorrichtung nach einem oder mehreren der Ansprüche 6 bis 9, gekennzeichnet durch ein zwischen dem Aktivkohlefilter (12) und einem zum zeitweiligen Spülen des Aktivkohlefilters (12) vorgesehenen Filter (21) angeordnetes bistabiles Ventil (40); insbesondere ein stromlos bistabiles Magnetventil, zum Ermöglichen eines Druckabbaus in der Brennstofftankanlage (10) über den Filter (21).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10012778 | 2000-03-17 | ||
DE10012778A DE10012778A1 (de) | 2000-03-17 | 2000-03-17 | Verfahren und Vorrichtung zum emissionsarmen Betrieb einer Brennstofftankanlage insbesondere eines Kraftfahrzeugs |
PCT/DE2001/000345 WO2001069072A1 (de) | 2000-03-17 | 2001-01-30 | Verfahren und vorrichtung zum emissionsarmen betrieb einer brennstofftankanlage insbesondere eines kraftfahrzeuges |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1183456A1 EP1183456A1 (de) | 2002-03-06 |
EP1183456B1 true EP1183456B1 (de) | 2005-12-07 |
Family
ID=7634923
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01913544A Expired - Lifetime EP1183456B1 (de) | 2000-03-17 | 2001-01-30 | Verfahren und vorrichtung zum emissionsarmen betrieb einer brennstofftankanlage insbesondere eines kraftfahrzeuges |
Country Status (6)
Country | Link |
---|---|
US (1) | US6782873B2 (de) |
EP (1) | EP1183456B1 (de) |
JP (1) | JP4564221B2 (de) |
BR (1) | BR0105175A (de) |
DE (2) | DE10012778A1 (de) |
WO (1) | WO2001069072A1 (de) |
Families Citing this family (17)
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WO2002103193A1 (en) * | 2001-06-14 | 2002-12-27 | Siemens Vdo Automotive Inc. | Apparatus and method for fuel vapor pressure management |
AU2003298987A1 (en) * | 2002-09-18 | 2004-04-08 | Foamex L.P. | Orientation independent liquid fuel reservoir |
US20040126643A1 (en) * | 2002-12-27 | 2004-07-01 | Kinkelaar Mark R. | Orientation independent fuel reservoir containing liquid fuel |
US7011077B2 (en) * | 2003-03-07 | 2006-03-14 | Siemens Vdo Automotive, Inc. | Fuel system and method for managing fuel vapor pressure with a flow-through diaphragm |
US7172825B2 (en) * | 2003-07-29 | 2007-02-06 | Societe Bic | Fuel cartridge with flexible liner containing insert |
US7350604B2 (en) * | 2004-03-04 | 2008-04-01 | Ford Global Technologies, Llc | Gaseous fuel system for automotive vehicle |
US7753034B2 (en) * | 2005-11-18 | 2010-07-13 | Basf Corporation, | Hydrocarbon adsorption method and device for controlling evaporative emissions from the fuel storage system of motor vehicles |
DE102006056384B4 (de) * | 2006-11-29 | 2016-06-23 | Audi Ag | Verfahren zur Funktionsüberprüfung eines Druckschalters einer Tankentlüftungsanlageund Steuereinrichtung |
DE102009010418B4 (de) * | 2008-05-29 | 2021-07-29 | A. Kayser Automotive Systems Gmbh | Aktivkohlefiltereinheit für ein Tanksystem |
DE102008002224A1 (de) | 2008-06-05 | 2009-12-10 | Robert Bosch Gmbh | Verfahren zur Erkennung von Leckagen in einem Tanksystem |
DE102009033589A1 (de) * | 2009-07-16 | 2011-02-17 | Aweco Appliance Systems Gmbh & Co. Kg | Dosiervorrichtung |
DE102009058864B4 (de) * | 2009-12-18 | 2012-05-10 | Temtec Fahrzeugtechnik Entwicklungsgesellschaft Mbh | Verfahren zum Ansteuern eines Kraftfahrzeugverschlusses und Verschlusseinrichtung für Kraftfahrzeuge |
EP2619435A4 (de) * | 2010-09-24 | 2017-03-29 | Karma Automotive LLC | System zur verdampfungs- und betankungs-emissionssteuerung für ein fahrzeug |
US9732705B2 (en) | 2013-10-15 | 2017-08-15 | Continental Automotive Systems, Inc. | Latching canister vent valve |
BR112017006087B1 (pt) * | 2014-09-24 | 2022-08-16 | Eaton Intelligent Power Limited | Sistema de tanque de combustível |
DE102017219220A1 (de) * | 2017-10-26 | 2019-05-02 | Continental Automotive Gmbh | Anordnung einer Pumpe zum Spülen eines Kraftstoffspeichers eines Fahrzeugs und Kraftstoffverdunstungsrückhaltesystem |
CN110220680A (zh) * | 2019-05-16 | 2019-09-10 | 航天科工防御技术研究试验中心 | 电磁阀测试系统及测试方法 |
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DE4040895C2 (de) * | 1990-12-20 | 1999-09-23 | Bosch Gmbh Robert | Tankentlüftungsanlage und Verfahren zum Betreiben einer solchen |
US5146902A (en) | 1991-12-02 | 1992-09-15 | Siemens Automotive Limited | Positive pressure canister purge system integrity confirmation |
JP3252503B2 (ja) * | 1992-01-17 | 2002-02-04 | 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 |
JP3565611B2 (ja) * | 1995-03-29 | 2004-09-15 | 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 |
JP3500816B2 (ja) * | 1995-12-08 | 2004-02-23 | 日産自動車株式会社 | エンジンの蒸発燃料処理装置におけるリーク診断装置 |
US5715799A (en) | 1996-03-05 | 1998-02-10 | Chrysler Corporation | Method of leak detection during low engine vacuum for an evaporative emission control system |
JP3339547B2 (ja) * | 1996-07-19 | 2002-10-28 | 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 |
JP3147001B2 (ja) * | 1996-09-24 | 2001-03-19 | 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 |
JP3269407B2 (ja) * | 1996-10-21 | 2002-03-25 | 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 |
JP3407566B2 (ja) * | 1996-11-05 | 2003-05-19 | 日産自動車株式会社 | 蒸発燃料処理装置の診断装置 |
US5957115A (en) | 1997-02-12 | 1999-09-28 | Siemens Canada Limited | Pulse interval leak detection system |
DE19709903A1 (de) | 1997-03-11 | 1998-09-17 | Pierburg Ag | Vorrichtung zum Spülen einer Aktivkohlefalle und zur zeitweiligen Dichtheitsprüfung einer mit dieser verbundenen Brennstofftankanlage einer Fahrzeug-Brennkraftmaschine |
US6192742B1 (en) * | 1997-11-17 | 2001-02-27 | Denso Corporation | More reliable leakage diagnosis for evaporated gas purge system |
US6089081A (en) * | 1998-01-27 | 2000-07-18 | Siemens Canada Limited | Automotive evaporative leak detection system and method |
JPH11247721A (ja) * | 1998-03-02 | 1999-09-14 | Honda Motor Co Ltd | 内燃機関の蒸発燃料放出防止装置 |
JP3685969B2 (ja) * | 1999-12-20 | 2005-08-24 | 本田技研工業株式会社 | 内燃機関の蒸発燃料処理装置 |
-
2000
- 2000-03-17 DE DE10012778A patent/DE10012778A1/de not_active Withdrawn
-
2001
- 2001-01-30 US US09/979,107 patent/US6782873B2/en not_active Expired - Fee Related
- 2001-01-30 JP JP2001567927A patent/JP4564221B2/ja not_active Expired - Fee Related
- 2001-01-30 WO PCT/DE2001/000345 patent/WO2001069072A1/de active IP Right Grant
- 2001-01-30 BR BR0105175-0A patent/BR0105175A/pt not_active Application Discontinuation
- 2001-01-30 EP EP01913544A patent/EP1183456B1/de not_active Expired - Lifetime
- 2001-01-30 DE DE50108284T patent/DE50108284D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US6782873B2 (en) | 2004-08-31 |
DE10012778A1 (de) | 2001-09-27 |
JP4564221B2 (ja) | 2010-10-20 |
BR0105175A (pt) | 2002-02-19 |
JP2003527530A (ja) | 2003-09-16 |
WO2001069072A1 (de) | 2001-09-20 |
DE50108284D1 (de) | 2006-01-12 |
US20020157655A1 (en) | 2002-10-31 |
EP1183456A1 (de) | 2002-03-06 |
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