EP2191125A2 - Procede de diagnostic du volet de derivation de l'echangeur dans un systeme de recirculation des gaz d'echappement - Google Patents
Procede de diagnostic du volet de derivation de l'echangeur dans un systeme de recirculation des gaz d'echappementInfo
- Publication number
- EP2191125A2 EP2191125A2 EP08837336A EP08837336A EP2191125A2 EP 2191125 A2 EP2191125 A2 EP 2191125A2 EP 08837336 A EP08837336 A EP 08837336A EP 08837336 A EP08837336 A EP 08837336A EP 2191125 A2 EP2191125 A2 EP 2191125A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- egr
- exchanger
- temperature
- bypass
- tsegr
- 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.)
- Granted
Links
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
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/45—Sensors specially adapted for EGR systems
- F02M26/46—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition
- F02M26/47—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition the characteristics being temperatures, pressures or flow rates
-
- 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
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
- F02M26/25—Layout, e.g. schematics with coolers having bypasses
-
- 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
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/33—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage controlling the temperature of the recirculated gases
-
- 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
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/49—Detecting, diagnosing or indicating an abnormal function of the EGR system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
- F02B29/04—Cooling of air intake supply
- F02B29/0406—Layout of the intake air cooling or coolant circuit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/0065—Specific aspects of external EGR control
- F02D2041/0067—Determining the EGR temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
- F02D41/0055—Special engine operating conditions, e.g. for regeneration of exhaust gas treatment apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven elements
-
- 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
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
Definitions
- the present invention relates to a method for diagnosing a failure of the EGR circuit of an engine, specifically the blocking of the bypass flap of the EGR exchanger.
- the bypass flap is a key element of the exhaust gas recirculation system (designated by the acronym EGR - Exhaust Gas Recirculation according to the English terminology).
- the proper functioning of the shutter thus makes it possible to guarantee the depollution of the current diesel engines.
- the blocking of the shutter in bypass mode or in cooled mode has direct consequences on the pollution emitted at the output of the engine.
- the risk associated with blocking the flap is also not related solely to pollution. Indeed, a failure of the shutter can have consequences on the reliability of the surrounding components (degradation due to a too high temperature of the EGR valve and its support) and the integrity of the engine control strategies that use it (such as example that the cleaning of the valve and the exchanger, or the priming of the catalyst).
- a first method uses a temperature sensor located at the inlet of the intake distributor and makes it possible to diagnose a blockage of the flap by measuring the temperature difference between the cool mode and bypass mode.
- this method requires the actuation of the shutter to be able to perform the diagnosis.
- it does not detect the position in which the shutter has blocked; however, the blocking in bypass or cooled mode does not have the same impact on pollution and we want to act differently in these two cases.
- this process seems relatively imprecise because the temperature sensor located at the inlet of the inlet distributor is influenced by the fresh air admitted.
- Another method implements a strategy based on the monitoring of the air flow before and after the activation of the bypass flap, the air intake flap and the EGR valve being fully open.
- the advantage of this solution is that it simply uses the flowmeter located on the fresh air intake duct.
- this strategy can generate a significant rate of false detections, due to the EGR environment (high temperature, fouling of the connectors) and the limited reactivity of the shutter control. Indeed, pressure wave phenomena delay the vacuum control of the bypass flap. In addition, it requires an intrusion into the operation of the engine, since it requires to open the air intake flap and the EGR valve.
- An object of the invention is therefore to define a simple and reliable, non-intrusive method for detecting any failure of the bypass flap and, where appropriate, the position in which it has blocked. This method must also make it possible to diagnose a total loss of the cooling function.
- a first object of the invention is a method for diagnosing a failure of the EGR circuit of an engine comprising an EGR exchanger, an EGR valve, a bypass duct of the EGR exchanger, and a so-called bypass damper disposed upstream of the EGR exchanger and the bypass duct of in order to regulate the proportion of the exhaust gases passing through them, the EGR circuit being able to be activated according to a so-called cooled mode, where the flap is closed, and a so-called bypass mode, where the flap is open, this method being characterized in that it comprises the following steps: estimation of the temperature of the exhaust gas at the outlet of the EGR exchanger when the EGR circuit is in bypass mode, measurement of the gas temperature of exhaust at the outlet of the EGR exchanger, calculating the difference between said estimated temperature and said measured temperature, comparing said deviation with a first or a second predetermined threshold so that:
- Tint is the temperature of the exhaust gas at the inlet of the EGR circuit
- Tco is the temperature of the cooling fluid of the EGR exchanger
- Tavt is the temperature of the exhaust gas upstream of the EGR circuit
- TeEGR is the temperature of the exhaust gas at the inlet of the EGR exchanger
- Another object of the invention concerns a device for diagnosing a failure of the EGR circuit of an engine comprising an EGR exchanger, an EGR valve, a bypass duct of the EGR exchanger, and a so-called bypass damper disposed upstream of the EGR exchanger and bypass duct so as to regulate the proportion of the exhaust gas passing therethrough, the EGR circuit being able to be activated in a so-called cooled mode, where the shutter is closed , and a so-called bypass mode, in which the flap is open, characterized in that it comprises: means for estimating the temperature of the exhaust gases at the outlet of the EGR exchanger when the EGR circuit is in bypass mode, a means for measuring the temperature of the exhaust gas at the outlet of the EGR exchanger, a means for calculating the difference between said estimated temperature and said measured temperature, and a means for comparing said deviation with a first or a second predetermined threshold of t she says:
- the device detects a blocking of the shutter in cooled mode
- the device detects a blocking of the shutter in bypass mode.
- the device according to the invention further comprises:
- FIG. 1 is a schematic view of a motor compartment in 2 is a schematic representation of an EGR exchanger and its bypass duct
- FIG. 3 illustrates the theoretical decomposition of the EGR circuit into a plurality of elementary exchangers.
- FIG. 4 is a logic diagram of the diagnostic strategy
- FIG. 5 illustrates the case of a functional bypass flap
- FIG. 6 illustrates the case of a bypass flap blocked in cooled mode
- FIG. the case of a bypass flap blocked in bypass mode.
- an engine compartment comprises an internal combustion engine 10, supplied with fresh air through an intake duct 11 and releasing its exhaust gas through an exhaust duct 12.
- this compartment motor is also provided with a turbocharger 50 comprising a compressor 51 disposed on the intake duct 11 for compressing the air coming from the duct 53.
- cooling means 40 and a flap 30 are provided between the compressor 51 and the engine 10. The air that reaches the engine 10 is cold.
- the turbine 52 of the turbocharger 50 is located at the end of the exhaust duct 12 and is coupled to the compressor 51. The exhaust gases are then discharged from the engine compartment via a duct 54.
- the engine compartment further comprises an exhaust gas recirculation circuit (also called EGR circuit 20), the inlet 28 of which is connected to the exhaust duct 12 and whose outlet 29 is connected to the intake duct 11.
- This EGR circuit 20 comprises a cooler or EGR exchanger 22, connected to the inlet 28 by an upstream duct 25 and the outlet 29 by a downstream duct 27, for cooling the exhaust gas before reinjecting it into the engine 10.
- a bypass pipe 24 connected, in its upstream part, to a solenoid valve 23 located upstream of the EGR exchanger 22, and in its downstream part, at the outlet of the exchanger 22.
- the solenoid valve 23 comprises a flap 23a which, depending on its position, allows a desired quantity of exhaust gas to pass through the bypass duct 24.
- An EGR valve 21 is further provided at the outlet of the circuit 20 so as to regulate the amount of exhaust gas reinjected into the engine 10.
- FIG. 2 represents an EGR exchanger 22 with an integrated bypass duct 24. If the flap 23a is closed, all the hot exhaust gases (solid arrow) pass into the EGR exchanger where they are cooled (hatched arrows): this is called “cooled mode”. If against the flap 23a is open, at least a portion of the exhaust gas pass into the bypass duct 24 and are not cooled: it is called “bypass mode”. It is therefore understood that the temperature TsEGR of the exhaust gas at the outlet of the exchanger 22 is higher in bypass mode (TsEGR2) than in cooled mode (TsEGRI).
- TsEGR2 bypass mode
- TsEGRI cooled mode
- the diagnostic strategy is based on measuring or estimating the temperature at the outlet of the EGR exchanger 22. This temperature can be, depending on the case, measured upstream or downstream of the EGR valve 21. .
- the strategy is based on calculating the difference between the estimated TsEGR in bypass mode (denoted TsEGR es t-byp) and the measured TsEGR (denoted TsEGRmes).
- the Applicant has developed a model of TsEGR in bypass mode which is the subject of the patent application FR 06 10065.
- the flow rate of the EGR gas (denoted Q EGR ) is itself estimated as corresponding to the difference between the engine flow (denoted Qmotor), the filling rate (noted ⁇ rempiissage), and the flow of fresh air (Q a ir ): z- ⁇ GR ⁇ motor VI filling / ⁇ £ a ⁇ r
- the filling efficiency is determined by means of the temperature Tcol and the pressure Pcol in the intake manifold; these values are given by sensors located in the intake manifold.
- the three aforementioned efficiencies correspond to the decomposition of the EGR circuit 20 into three elementary exchangers, represented in FIG. 3: the first elementary exchanger corresponds to the exhaust duct
- the second elementary exchanger corresponds to the conduit 25 between the inlet 28 of the EGR circuit 20 (temperature Tint) and the inlet of the exchanger
- EGR 22 (TeEGR temperature); the third elementary heat exchanger corresponds to the portion between the inlet of the EGR exchanger 22 (TeEGR temperature) and the outlet of the heat exchanger
- Tint is the temperature of the exhaust gas at the inlet of the EGR circuit (20)
- Tco is the temperature of the cooling fluid of the EGR exchanger (22)
- Tavt is the temperature of the exhaust gases upstream of the circuit EGR (20)
- TeEGR is the temperature of the exhaust gases at the inlet of the EGR exchanger (22).
- TsEGR temperature sensors
- TsEGR me s temperature measured by a probe located at the outlet of the EGR exchanger 22, and the estimated temperature TsEGR in bypass mode according to the formula described above, can be diagnosed continuously functionality of the flap by-pass 23a, both in bypass mode and cooled mode, and this, without driving (that is to say without intrusion into the operation of the shutter). It is considered that if the flap 23a is functional, then: if the flap is controlled in bypass mode, the difference between TsEGR es t-byp and TsEGRmes must be small; if the shutter is controlled in cooled mode, the difference between TsEGR es t-byp and TsEGRmes must be high.
- a threshold Sbm and a threshold S cm so that: if the difference
- the blocking causes of the flap 23a may be a mechanical seizure, the disconnection of the hose of the bypass solenoid valve 23 or a control problem.
- the logic diagram of FIG. 4 illustrates more precisely the logical approach to diagnosis: when the vehicle is started, the device is initialized (box 101); as long as the conditions are not stabilized (box 102), the diagnosis is inactive; indeed, to increase the reliability of detection, the diagnosis is made on operating points where the speed and the torque are stable, by avoiding transient modes that generate highly dispersed estimates of TsEGR and Q EGR ; when the conditions are stabilized (box 103), the activation mode of the EGR circuit is detected: bypass mode or cooled mode (box 104); if the EGR circuit is in bypass mode:
- the temperature TsEGR is measured and the estimated temperature TsEGR is calculated in bypass mode, then the temperature difference is calculated:
- the temperature difference ⁇ bm is compared with the threshold Sbm determined beforehand (box 106),
- the temperature TsEGR is measured and the estimated temperature TsEGR is calculated in bypass mode, then the temperature difference is calculated:
- the temperature difference ⁇ cm is compared with the threshold S cm determined beforehand (box 106),
- a degraded mode is activated, consisting in closing the EGR valve 21 in order to reduce the temperature at its terminals.
- This strategy is implemented in the engine control unit (ECU).
- Figure 5 illustrates the case of a functional shutter.
- the curve C1 in the form of a slot corresponds to the state of the control of the bypass flap: the high value corresponds to the bypass mode, the low value corresponds to the cooled mode.
- the curve C2 in the form of a slot corresponds to the diagnostic condition: the high values correspond to the diagnostic phases.
- the EGR circuit is in bypass mode and the temperature difference ⁇ bm is lower than the detection threshold in bypass mode Sbm: the flap is therefore considered as functional.
- the EGR circuit is in cooled mode, and the temperature difference ⁇ cm is greater than the detection threshold in cooled mode S cm : the flap is thus detected as functional.
- Curves C1 and C2 are defined in the same way as in FIG.
- the EGR circuit is in bypass mode.
- the temperature difference ⁇ bm remains greater than the detection threshold in bypass mode Sbm for a duration Tbm: the flap is therefore considered as blocked in cooled mode.
- Curves C1 and C2 are defined in the same way as in Figures 5 and 6.
- the EGR circuit is in bypass mode. Since the temperature difference ⁇ bm is less than Sbm, the flap is considered functional.
- the use for the diagnosis of a temperature sensor at the outlet of the EGR exchanger improves the reliability of detection of the process.
- this temperature sensor can advantageously be used, as needed, for other diagnostic purposes.
- the method according to the invention makes it possible to detect a total loss of the cooling function; failures leading to this loss - for example, a water leak - are however rarer.
- the method of the invention also has the advantage of not being intrusive, that is to say that it does not require actuating the bypass flap for check its functionality.
- the implementation of this process does not cause additional pollution.
- this strategy makes it possible to know the position in which the bypass pane is blocked: this information is necessary for the proper operation of the degraded mode (ie only if the pane is blocked in bypass mode), which represents an additional gain in terms of depollution.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Analytical Chemistry (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0757714A FR2921426B1 (fr) | 2007-09-20 | 2007-09-20 | Procede de diagnostic du volet de derivation de l'echangeur dans un systeme de recirculation des gaz d'echappement |
PCT/FR2008/051689 WO2009047465A2 (fr) | 2007-09-20 | 2008-09-19 | Procede de diagnostic du volet de derivation de l'echangeur dans un systeme de recirculation des gaz d'echappement |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2191125A2 true EP2191125A2 (fr) | 2010-06-02 |
EP2191125B1 EP2191125B1 (fr) | 2017-06-14 |
Family
ID=39402754
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08837336.0A Not-in-force EP2191125B1 (fr) | 2007-09-20 | 2008-09-19 | Procede de diagnostic du volet de derivation de l'echangeur dans un systeme de recirculation des gaz d'echappement |
Country Status (5)
Country | Link |
---|---|
US (1) | US20100307231A1 (fr) |
EP (1) | EP2191125B1 (fr) |
JP (1) | JP2010539390A (fr) |
FR (1) | FR2921426B1 (fr) |
WO (1) | WO2009047465A2 (fr) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8342015B2 (en) | 2007-09-20 | 2013-01-01 | Renault S.A.S. | Method for diagnosing the exchanger bypass flap in an exhaust gas recirculation circuit |
FR2938016B1 (fr) * | 2008-10-30 | 2010-10-29 | Renault Sas | Procede d'estimation dynamique du debit d'air frais alimentant un moteur avec circuits egr haute et basse pression |
JP5251844B2 (ja) * | 2009-11-24 | 2013-07-31 | トヨタ自動車株式会社 | 冷却装置の異常判定装置および冷却装置の異常判定方法 |
US9127606B2 (en) * | 2010-10-20 | 2015-09-08 | Ford Global Technologies, Llc | System for determining EGR degradation |
US9476387B2 (en) * | 2011-05-13 | 2016-10-25 | Ford Global Technologies, Llc | System for determining EGR cooler degradation |
SE537803C2 (sv) * | 2011-09-30 | 2015-10-20 | Scania Cv Ab | EGR-kylare samt förbränningsmotor med en sådan EGR-kylare |
US9670830B2 (en) * | 2014-10-29 | 2017-06-06 | GM Global Technology Operations LLC | Method and apparatus for monitoring a coolant system for an exhaust gas recirculation system |
KR101896326B1 (ko) * | 2016-09-09 | 2018-09-07 | 현대자동차 주식회사 | 수냉식 이지알 쿨러 |
US20180128145A1 (en) * | 2016-11-09 | 2018-05-10 | Ford Global Technologies, Llc | Method and system for an exhaust diverter valve |
DE102017210714A1 (de) | 2017-06-26 | 2018-12-27 | Wafios Aktiengesellschaft | Verfahren zur Herstellung eines Biegeteils und Biegemaschine zur Durchführung des Verfahrens |
US11828210B2 (en) | 2020-08-20 | 2023-11-28 | Denso International America, Inc. | Diagnostic systems and methods of vehicles using olfaction |
US11760170B2 (en) | 2020-08-20 | 2023-09-19 | Denso International America, Inc. | Olfaction sensor preservation systems and methods |
US11932080B2 (en) | 2020-08-20 | 2024-03-19 | Denso International America, Inc. | Diagnostic and recirculation control systems and methods |
US11881093B2 (en) | 2020-08-20 | 2024-01-23 | Denso International America, Inc. | Systems and methods for identifying smoking in vehicles |
US11636870B2 (en) | 2020-08-20 | 2023-04-25 | Denso International America, Inc. | Smoking cessation systems and methods |
US11813926B2 (en) | 2020-08-20 | 2023-11-14 | Denso International America, Inc. | Binding agent and olfaction sensor |
US11760169B2 (en) | 2020-08-20 | 2023-09-19 | Denso International America, Inc. | Particulate control systems and methods for olfaction sensors |
US12017506B2 (en) | 2020-08-20 | 2024-06-25 | Denso International America, Inc. | Passenger cabin air control systems and methods |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6085732A (en) * | 1999-01-25 | 2000-07-11 | Cummins Engine Co Inc | EGR fault diagnostic system |
JP2003336549A (ja) * | 2002-05-20 | 2003-11-28 | Denso Corp | 内燃機関のegr装置 |
JP3751930B2 (ja) * | 2002-11-01 | 2006-03-08 | トヨタ自動車株式会社 | 内燃機関のegrガス温度推定装置 |
JP4498831B2 (ja) * | 2004-06-15 | 2010-07-07 | トヨタ自動車株式会社 | 内燃機関の排気循環装置 |
DE102004041767A1 (de) * | 2004-08-28 | 2006-03-02 | Robert Bosch Gmbh | Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine mit Abgasrückführung |
JP2006242080A (ja) * | 2005-03-02 | 2006-09-14 | Denso Corp | 排気還流装置の異常診断装置 |
JP4538363B2 (ja) * | 2005-04-14 | 2010-09-08 | 本田技研工業株式会社 | 内燃機関のegr装置 |
FR2908825B1 (fr) * | 2006-11-17 | 2009-01-30 | Renault Sas | Estimation d'une temperature de gaz d'echappement en sortie d'un circuit egr d'un moteur a combustion |
JP5011990B2 (ja) * | 2006-12-06 | 2012-08-29 | いすゞ自動車株式会社 | Egrシステムの故障判定方法及びegrシステムの故障判定システム |
US8342015B2 (en) * | 2007-09-20 | 2013-01-01 | Renault S.A.S. | Method for diagnosing the exchanger bypass flap in an exhaust gas recirculation circuit |
US7918129B2 (en) * | 2008-05-27 | 2011-04-05 | GM Global Technology Operations LLC | Diagnostic systems for cooling systems for internal combustion engines |
-
2007
- 2007-09-20 FR FR0757714A patent/FR2921426B1/fr not_active Expired - Fee Related
-
2008
- 2008-09-19 WO PCT/FR2008/051689 patent/WO2009047465A2/fr active Application Filing
- 2008-09-19 JP JP2010525412A patent/JP2010539390A/ja active Pending
- 2008-09-19 US US12/679,197 patent/US20100307231A1/en not_active Abandoned
- 2008-09-19 EP EP08837336.0A patent/EP2191125B1/fr not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2009047465A2 * |
Also Published As
Publication number | Publication date |
---|---|
JP2010539390A (ja) | 2010-12-16 |
EP2191125B1 (fr) | 2017-06-14 |
FR2921426B1 (fr) | 2014-02-14 |
US20100307231A1 (en) | 2010-12-09 |
WO2009047465A3 (fr) | 2009-06-04 |
WO2009047465A2 (fr) | 2009-04-16 |
FR2921426A1 (fr) | 2009-03-27 |
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