WO1991012426A1 - Tankentlüftungsanlage für einen kraftfahrzeug und verfahren zum überprüfen deren funktionstüchtigkeit - Google Patents
Tankentlüftungsanlage für einen kraftfahrzeug und verfahren zum überprüfen deren funktionstüchtigkeit Download PDFInfo
- Publication number
- WO1991012426A1 WO1991012426A1 PCT/DE1991/000010 DE9100010W WO9112426A1 WO 1991012426 A1 WO1991012426 A1 WO 1991012426A1 DE 9100010 W DE9100010 W DE 9100010W WO 9112426 A1 WO9112426 A1 WO 9112426A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tank
- valve
- ventilation
- line
- adsorption filter
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 27
- 238000009434 installation Methods 0.000 title abstract 3
- 238000013022 venting Methods 0.000 title abstract 2
- 238000001179 sorption measurement Methods 0.000 claims abstract description 30
- 238000009423 ventilation Methods 0.000 claims description 86
- 239000002828 fuel tank Substances 0.000 claims description 14
- 238000002485 combustion reaction Methods 0.000 claims description 11
- 206010006895 Cachexia Diseases 0.000 claims description 2
- 208000026500 emaciation Diseases 0.000 claims description 2
- 238000005273 aeration Methods 0.000 abstract 2
- 239000000446 fuel Substances 0.000 description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
- 230000001681 protective effect Effects 0.000 description 6
- 235000010678 Paulownia tomentosa Nutrition 0.000 description 1
- 240000002834 Paulownia tomentosa Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000011990 functional testing Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000010943 off-gassing Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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
-
- 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
-
- 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
- Tank ventilation system for a motor vehicle and method for checking its functionality
- the invention relates to a tank ventilation system for a motor vehicle and a method for checking the functionality of such a system.
- a tank ventilation system generally has a fuel tank and a tank ventilation valve, which is connected to the intake manifold of an internal combustion engine, so that fuel vapors are sucked out with the help of the vacuum in the intake manifold, usually we do not directly suck the volume above the fuel in the tank, but between the tank and the tank vent valve is an adsorption filter, usually an activated carbon filter, interposed.
- This activated carbon filter adsorbs fuel in those periods in which there is no suction from the intake manifold, e.g. B. when the internal combustion engine is at a standstill or when the tank ventilation valve is kept closed due to the current operating state.
- tank ventilation systems will leak or that the tank ventilation valve will not work properly.
- Systems of this type are therefore to be checked repeatedly for functionality during the operation of a motor vehicle.
- the most important method for checking the functionality of a motor vehicle tank ventilation system is based on a proposal from the California environmental agency CARB. According to this method, when the tank ventilation valve is opened, it is checked whether a lambda controller has to make a correction in its manipulated value. This is always the case when air is sucked in with fuel vapor from the tank ventilation system. However, it is now the case that the adsorption filter can be completely regenerated and that the fuel in the tank is completely degassed. Then, when the tank ventilation valve is opened, no fuel is supplied in addition to that which is supplied to the injection valves of the internal combustion engine in accordance with the manipulated variable of the lambda control.
- the signal from the lambda controller is only evaluated according to the known method if a fuel temperature sensor indicates that a predetermined minimum fuel temperature has been exceeded and a tank level sensor indicates that the vehicle has been refueled. It is assumed that in any case fuel vapor should then be present in the system, which is sucked in when the tank ventilation valve is opened and then leads to a correction of the lambda regulator.
- the tank ventilation system according to the invention for a motor vehicle has the following parts:
- an adsorption filter which is connected to the fuel tank via a filter line and which has a ventilation line with a controllable shut-off valve
- a tank ventilation valve which connects the adsorption filter to the intake manifold of an internal combustion engine via a valve line.
- This system differs from known systems in that the ventilation line of the adsorption filter can be shut off in a controlled manner. This enables the method according to the invention specified below to check the functionality of the system. The methods have the common idea that they utilize the shut-off capability of the ventilation line of the adsorption filter.
- the method according to the invention for checking the functionality of a motor vehicle tank ventilation system works in such a way that
- the tank ventilation valve of the system is only opened when a minimum overpressure has built up in the tank and the internal combustion engine to which the system is connected operates with low air throughputs,
- the shut-off device advantageously has overpressure and vacuum protection valves.
- the functionality of the shut-off device can be checked by releasing the ventilation line when there is negative pressure. If the negative pressure then dissipates, this is a sign that the shut-off device is working properly.
- FIG. 1 shows a schematic representation of a tank ventilation system with an adsorption filter with a lockable ventilation line
- FIG. 3 shows a flowchart for explaining a method for checking the functionality of a motor vehicle tank ventilation system, which works both with a test under negative pressure and with a test under positive pressure.
- FIG. 1 schematically shows a tank ventilation system with a fuel tank KT, an adsorption filter AF and a tank ventilation valve TEV.
- the latter lies in a valve line VL, which connects the adsorption filter AF to the intake manifold SR of an internal combustion engine, not shown.
- the Venti 1 line opens in the direction of flow L of air drawn in behind the throttle valve. This makes it possible to achieve a relatively high negative pressure in the valve line in order to effectively rinse the adsorption filter AF.
- the throttle valve is largely closed and at higher speeds, the negative pressure drops to a few 100 hPa.
- the adsorption filter AF is in turn connected to the fuel tank KT via a filter line FL. If the fuel is in the fuel tank, the outgassing fuel is adsorbed by activated carbon in the adsorption filter AF.
- a ventilation line BL also opens into the adsorption filter AF. Air flows through this ventilation line BL when the adsorption filter AF is sucked off via the valve line with the tank ventilation valve TEV. This regenerates the activated carbon. In standstill phases of the engine or in operating phases in which the tank ventilation valve is closed, the activated carbon can then absorb fuel again. Due to the components to be described, the tank ventilation system shown in FIG.
- This zu ⁇ sharmlichen components are a differential pressure sensor DDM, which measures the differential pressure in the tank against the AtmosDhddruck, and a check valve for controllably shutting off the Bel ⁇ ftungslei- tung BL.
- the shut-off valve AV can be opened or closed with the aid of a signal which is output by a control unit SG. The criteria according to which signals are output are explained below with reference to FIG. 3.
- the line of a protective valve arrangement SVA also flows into the ventilation line BL, which protective valve arrangement has an overpressure and a negative pressure Protection valve.
- the pressures in the protective valve arrangement are set such that there is no risk of damage to the tank ventilation system because the pressures are too high or too low.
- a tank shut-off valve TSV ensures that fuel gas only reaches the adsorption filter AF when a certain excess pressure in the fuel tank KT is exceeded, e.g. B. 30 hPa. Since this tank shut-off valve TSV prevents the tank from being vented under negative pressure, a tank ventilation valve TBV is also available. B. opens at a vacuum of 30 hPa in the tank.
- a filter shut-off valve FSV is present, which only leads the way into the valve line VL releases below a certain negative pressure in this, z. B. with a pressure drop to less than 50 hPa.
- Various errors can occur in the tank ventilation system according to FIG. 1. It is therefore possible for all components to leak.
- the tank vent valve TEV and the shut-off valve il A3 can also become inoperative. In the case of the adsorption filter AF.2 according to FIG. 2, the check valves become inoperable.
- FIG. 3 explains how the functionality of the tank ventilation system according to FIG. 1 can be checked.
- the method also makes it possible to find faults in an absorption filter AF.2 according to FIG. 2, that is to say with check valves.
- the ventilation line BL is shut off in a step s1, which is done by correspondingly controlling the shutoff valve AV.
- This process step of shutting off the ventilation valve is a decisive step for all the process variants explained below.
- step s2 a query is made as to whether a test with negative pressure should be carried out in steps s3 to s9. Such a test can e.g. B. at fixed time intervals. If no vacuum test is to be carried out, step s2 is followed by process steps s10 to s16, which use overpressure in the system. The test with the help of overpressure can also take place at fixed time intervals, or after a test with underpressure.
- step s3 the tank ventilation valve TEV is opened. Since the ventilation line BL is closed, vacuum must now build up in the tank ventilation system if it is tight.
- the pressure measured by the differential pressure meter DDM is first queried in a step s4. It is determined in a step s5 that no negative pressure with an absolute value above a predetermined threshold value (eg 50 hPa (negative pressure)) is obtained, an error message is output in a step s6.
- a predetermined threshold value eg 50 hPa (negative pressure)
- an evaluation can be excluded, e.g. B. full load, since then wrong, intake manifold is almost atmospheric pressure ⁇ and therefore no significant negative pressure can build up in the ventilation system.
- a step s7 follows in which the ventilation line is released again by opening the shut-off valve AV.
- a step s8 it is checked whether the value of the negative pressure measured by the differential pressure meter DDM falls. If this is the case, the end of the procedure is reached. Otherwise, an error message is output in a step s9, which indicates that the shut-off valve AV no longer opens properly. A leakage and thus malfunction of the system can already be fully checked through steps s1-s9.
- step s2 If, in step s2, after the described check with negative pressure has been switched over to the lambda correction check with positive pressure, the tank ventilation valve is closed in step s10 and the ventilation line BL is blocked by closing the shut-off valve AV.
- step s11 the differential pressure for the fuel tank KT detected by the differential pressure meter DDM is queried. It is then checked (step s12) whether there is an overpressure that lies above a predetermined threshold, e.g. B. at more than 30 hPa. If this is not the case, steps s11 and s12 are repeated until an overpressure above said threshold is reached, or until a step s13 between steps s12 and s 11 it is determined that a test end condition has occurred. This can be, for.
- test B. can be the expiration of a period of time since the start of the check for reaching the predetermined positive pressure.
- the end of the test condition can, however, also consist in reaching predetermined operating states. If the test end condition occurs, the end of the Procedure reached. Since an overpressure never builds up under certain circumstances (e.g. with outgassed fuel), the pressure threshold may never be reached. The following test steps therefore provide additional information on the vacuum test and are not sufficient as the sole error criterion.
- step s12 shows that the predetermined positive pressure has been exceeded
- the tank ventilation valve TEV is opened in step s1.
- the internal combustion engine is suddenly supplied with fuel in addition to that which is injected anyway.
- the lambda control must then reduce the amount of fuel to be injected.
- step s15 it is checked whether a lean correction in the lambda control is necessary when the tank ventilation valve is opened in step s 14. If this is the case, it is again confirmed that the tank ventilation system has delivered fuel in the expected manner. The end of the procedure is then reached. Otherwise, an error message is output in step s16. If the previous vacuum test already showed an error, it has now been proven that the connecting pipe between the intake manifold and the tank ventilation valve is interrupted.
- step s14 If the tank ventilation valve TEV is opened in step s14, a negative pressure builds up in the tank ventilation system.
- the realizable negative pressure is usually sufficient to vaporize fuel in the fuel tank KT and thus to deliver fuel through the valve line VL into the intake manifold SR.
- the vacuum must not fall below a few 10 hPa, otherwise there is a risk of implosion for the fuel tank KT.
- the suppression is accordingly limited by the protective valve arrangement SVA.
- the test is only carried out if there was previously overpressure in the tank. However, as already mentioned above, this overpressure cannot be guaranteed in all cases despite the blocked ventilation line BL.
- the aforementioned process sequences also check the functionality of an adsorption filter AF.2 with check valves TSV, T3V and FSV according to FIG. 2. If it is found in step s5 that the expected negative pressure is building up, this is a sign that the Valves TSV and FSV are universal. If the expected vacuum does not occur, either one of these two valves is blocked or the TEV tank ventilation valve or the system is leaking. If the pressure in the tank KT rises above a permissible value when the ventilation line BL is open, the check valve TSV is clogged. If the pressure in the tank drops when the ventilation line BL is open, this indicates that the tank ventilation valve TBV is clogged. In a corresponding manner, a functional test of the protective valve arrangement SVA is also possible; no negative pressures or excess pressures may occur whose absolute values exceed the values of the protective pressures.
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- 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)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019910701263A KR100236136B1 (ko) | 1990-02-08 | 1991-01-09 | 차량용 탱크 환기 시스템 및 작동성 시험 방법 |
DE59108403T DE59108403D1 (de) | 1990-02-08 | 1991-01-09 | Tankentlüftungsanlage für ein kraftfahrzeug und verfahren zum überprüfen deren funktionstüchtigkeit |
EP91901685A EP0466850B1 (de) | 1990-02-08 | 1991-01-09 | Tankentlüftungsanlage für ein kraftfahrzeug und verfahren zum überprüfen deren funktionstüchtigkeit |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4003751A DE4003751C2 (de) | 1990-02-08 | 1990-02-08 | Tankentlüftungsanlage für ein Kraftfahrzeug und Verfahren zum Überprüfen deren Funktionstüchtigkeit |
DEP4003751.7 | 1990-02-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1991012426A1 true WO1991012426A1 (de) | 1991-08-22 |
Family
ID=6399679
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1991/000010 WO1991012426A1 (de) | 1990-02-08 | 1991-01-09 | Tankentlüftungsanlage für einen kraftfahrzeug und verfahren zum überprüfen deren funktionstüchtigkeit |
Country Status (6)
Country | Link |
---|---|
US (1) | US5193512A (de) |
EP (1) | EP0466850B1 (de) |
JP (1) | JP3036703B2 (de) |
KR (1) | KR100236136B1 (de) |
DE (2) | DE4003751C2 (de) |
WO (1) | WO1991012426A1 (de) |
Cited By (28)
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---|---|---|---|---|
WO1992017698A1 (en) * | 1991-03-28 | 1992-10-15 | Siemens Aktiengesellschaft | Diagnostic system for canister purge system |
FR2675087A1 (fr) * | 1991-04-09 | 1992-10-16 | Bosch Gmbh Robert | Installation d'aeration de reservoir ainsi que procede et dispositif pour son controle. |
WO1992018764A1 (de) * | 1991-04-09 | 1992-10-29 | Robert Bosch Gmbh | Verfahren und vorrichtung zum prüfen einer tankentlüftungsanlage |
WO1992018765A1 (de) * | 1991-04-17 | 1992-10-29 | Robert Bosch Gmbh | Verfahren und vorrichtung zum überprüfen der funktionsfähigkeit einer tankentlüftungsanlage |
EP0527523A1 (de) * | 1991-08-12 | 1993-02-17 | General Motors Corporation | Verdampfungsemissionssteuerungssystem |
FR2681098A1 (fr) * | 1991-09-10 | 1993-03-12 | Siemens Automotive Sa | Procede et dispositif de verification de l'etat de fonctionnement d'un systeme de recuperation de vapeurs issues du reservoir de carburant d'un vehicule automobile a moteur a combustion interne. |
EP0554587A1 (de) * | 1992-02-03 | 1993-08-11 | General Motors Corporation | Durchflussgerät für Brennstoffverdampfungssteuerungssystem |
US5263462A (en) * | 1992-10-29 | 1993-11-23 | General Motors Corporation | System and method for detecting leaks in a vapor handling system |
WO1993023265A1 (en) * | 1992-05-12 | 1993-11-25 | Ab Volvo | Fuel system for motor vehicles |
EP0575981A1 (de) * | 1992-06-26 | 1993-12-29 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Verfahren zum Überwachen für eine Brennstoffdampfbehandlungsanlage |
EP0589176A2 (de) * | 1992-09-25 | 1994-03-30 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zur Dichtheitsprüfung einer Tankanlage für Kraftfahrzeuge |
WO1994015090A1 (en) * | 1992-12-23 | 1994-07-07 | Siemens Electric Limited | Integrity confirmation of evaporative emission control system against leakage |
US5333589A (en) * | 1991-06-10 | 1994-08-02 | Toyota Jidosha Kabushiki Kaisha | Apparatus for detecting malfunction in evaporated fuel purge system |
EP0611674A1 (de) * | 1993-02-13 | 1994-08-24 | Lucas Industries Public Limited Company | Verfahren und Vorrichtung zum Ermitteln eines Lecks im Kraftstoffsystem |
US5383438A (en) * | 1993-02-05 | 1995-01-24 | Robert Bosch Gmbh | Tank venting system for an internal combustion engine |
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US5396873A (en) * | 1992-12-18 | 1995-03-14 | Honda Giken Kogyo Kabushiki Kaisha | Evaporative fuel-processing system for internal combustion engines |
US5425344A (en) * | 1992-01-21 | 1995-06-20 | Toyota Jidosha Kabushiki Kaisha | Diagnostic apparatus for evaporative fuel purge system |
US5427075A (en) * | 1993-06-28 | 1995-06-27 | Honda Giken Kogyo Kabushiki Kaisha | Evaporative emission control system for internal combustion engines |
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US5750888A (en) * | 1995-07-21 | 1998-05-12 | Mitsubishi Jidosha Kogyo Kabushi Kaisha | Fault diagnostic method and apparatus for fuel evaporative emission control system |
FR2756517A1 (fr) * | 1996-11-29 | 1998-06-05 | Peugeot | Methode pour maintenir un volume d'expansion dans un reservoir de carburant lors de son remplissage, dispositif pour sa mise en oeuvre et vehicule automobile equipe de ce dispositif |
US6851443B2 (en) | 2001-06-14 | 2005-02-08 | Siemens Vdo Automotive, Inc. | Apparatus and method for preventing resonance in a fuel vapor pressure management apparatus |
US6948355B1 (en) | 2002-09-23 | 2005-09-27 | Siemens Vdo Automotive, Incorporated | In-use rate based calculation for a fuel vapor pressure management apparatus |
US7004014B2 (en) | 2002-12-17 | 2006-02-28 | Siemens Vdo Automotive Inc | Apparatus, system and method of establishing a test threshold for a fuel vapor leak detection system |
US7028674B2 (en) | 2003-01-17 | 2006-04-18 | Siemens Vdo Automotive Inc. | Flow sensor integrated with leak detection for purge valve diagnostic |
US7028722B2 (en) | 2002-09-23 | 2006-04-18 | Siemens Vdo Automotive, Inc. | Rationality testing for a fuel vapor pressure management apparatus |
US7201154B2 (en) | 2003-01-17 | 2007-04-10 | Siemens Canada Limited | Flow sensor for purge valve diagnostic |
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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 |
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WO1992017698A1 (en) * | 1991-03-28 | 1992-10-15 | Siemens Aktiengesellschaft | Diagnostic system for canister purge system |
FR2675087A1 (fr) * | 1991-04-09 | 1992-10-16 | Bosch Gmbh Robert | Installation d'aeration de reservoir ainsi que procede et dispositif pour son controle. |
WO1992018764A1 (de) * | 1991-04-09 | 1992-10-29 | Robert Bosch Gmbh | Verfahren und vorrichtung zum prüfen einer tankentlüftungsanlage |
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US5265577A (en) * | 1991-04-17 | 1993-11-30 | Robert Bosch Gmbh | Method and arrangement for checking the operability of a tank-venting system |
WO1992018765A1 (de) * | 1991-04-17 | 1992-10-29 | Robert Bosch Gmbh | Verfahren und vorrichtung zum überprüfen der funktionsfähigkeit einer tankentlüftungsanlage |
US5333589A (en) * | 1991-06-10 | 1994-08-02 | Toyota Jidosha Kabushiki Kaisha | Apparatus for detecting malfunction in evaporated fuel purge system |
EP0527523A1 (de) * | 1991-08-12 | 1993-02-17 | General Motors Corporation | Verdampfungsemissionssteuerungssystem |
US5275144A (en) * | 1991-08-12 | 1994-01-04 | General Motors Corporation | Evaporative emission system diagnostic |
FR2681098A1 (fr) * | 1991-09-10 | 1993-03-12 | Siemens Automotive Sa | Procede et dispositif de verification de l'etat de fonctionnement d'un systeme de recuperation de vapeurs issues du reservoir de carburant d'un vehicule automobile a moteur a combustion interne. |
US5425344A (en) * | 1992-01-21 | 1995-06-20 | Toyota Jidosha Kabushiki Kaisha | Diagnostic apparatus for evaporative fuel purge system |
EP0554587A1 (de) * | 1992-02-03 | 1993-08-11 | General Motors Corporation | Durchflussgerät für Brennstoffverdampfungssteuerungssystem |
WO1993023265A1 (en) * | 1992-05-12 | 1993-11-25 | Ab Volvo | Fuel system for motor vehicles |
EP0575981A1 (de) * | 1992-06-26 | 1993-12-29 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Verfahren zum Überwachen für eine Brennstoffdampfbehandlungsanlage |
EP0589176B1 (de) * | 1992-09-25 | 1997-04-16 | Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 | Verfahren zur Dichtheitsprüfung einer Tankanlage für Kraftfahrzeuge |
EP0589176A2 (de) * | 1992-09-25 | 1994-03-30 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zur Dichtheitsprüfung einer Tankanlage für Kraftfahrzeuge |
US5263462A (en) * | 1992-10-29 | 1993-11-23 | General Motors Corporation | System and method for detecting leaks in a vapor handling system |
US5396873A (en) * | 1992-12-18 | 1995-03-14 | Honda Giken Kogyo Kabushiki Kaisha | Evaporative fuel-processing system for internal combustion engines |
WO1994015090A1 (en) * | 1992-12-23 | 1994-07-07 | Siemens Electric Limited | Integrity confirmation of evaporative emission control system against leakage |
US5383438A (en) * | 1993-02-05 | 1995-01-24 | Robert Bosch Gmbh | Tank venting system for an internal combustion engine |
EP0611674A1 (de) * | 1993-02-13 | 1994-08-24 | Lucas Industries Public Limited Company | Verfahren und Vorrichtung zum Ermitteln eines Lecks im Kraftstoffsystem |
US5427075A (en) * | 1993-06-28 | 1995-06-27 | Honda Giken Kogyo Kabushiki Kaisha | Evaporative emission control system for internal combustion engines |
US5499613A (en) * | 1993-07-21 | 1996-03-19 | Siemens Aktiengesellschaft | Method for monitoring a tank venting system that traps fuel vapors and feeds them to an internal combustion engine |
EP0635633A1 (de) * | 1993-07-21 | 1995-01-25 | Siemens Aktiengesellschaft | Verfahren zum Überwachen einer Kraftstoffdämpfe auffangenden und einer Brennkraftmaschine zuleitenden Tankentlüftungsanlage |
EP0690218A1 (de) * | 1994-06-30 | 1996-01-03 | Rover Group Limited | Verfahren und Vorrichtung zur Bestimmung einer Undichte in einem Brennstoffsystem |
US5750888A (en) * | 1995-07-21 | 1998-05-12 | Mitsubishi Jidosha Kogyo Kabushi Kaisha | Fault diagnostic method and apparatus for fuel evaporative emission control system |
FR2756517A1 (fr) * | 1996-11-29 | 1998-06-05 | Peugeot | Methode pour maintenir un volume d'expansion dans un reservoir de carburant lors de son remplissage, dispositif pour sa mise en oeuvre et vehicule automobile equipe de ce dispositif |
US6851443B2 (en) | 2001-06-14 | 2005-02-08 | Siemens Vdo Automotive, Inc. | Apparatus and method for preventing resonance in a fuel vapor pressure management apparatus |
US6948355B1 (en) | 2002-09-23 | 2005-09-27 | Siemens Vdo Automotive, Incorporated | In-use rate based calculation for a fuel vapor pressure management apparatus |
US7028722B2 (en) | 2002-09-23 | 2006-04-18 | Siemens Vdo Automotive, Inc. | Rationality testing for a fuel vapor pressure management apparatus |
US7004014B2 (en) | 2002-12-17 | 2006-02-28 | Siemens Vdo Automotive Inc | Apparatus, system and method of establishing a test threshold for a fuel vapor leak detection system |
US7028674B2 (en) | 2003-01-17 | 2006-04-18 | Siemens Vdo Automotive Inc. | Flow sensor integrated with leak detection for purge valve diagnostic |
US7201154B2 (en) | 2003-01-17 | 2007-04-10 | Siemens Canada Limited | Flow sensor for purge valve diagnostic |
Also Published As
Publication number | Publication date |
---|---|
KR100236136B1 (ko) | 2000-01-15 |
US5193512A (en) | 1993-03-16 |
DE4003751A1 (de) | 1991-08-14 |
JP3036703B2 (ja) | 2000-04-24 |
JPH04505491A (ja) | 1992-09-24 |
DE4003751C2 (de) | 1999-12-02 |
DE59108403D1 (de) | 1997-01-23 |
EP0466850B1 (de) | 1996-12-11 |
EP0466850A1 (de) | 1992-01-22 |
KR920701651A (ko) | 1992-08-12 |
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