EP0935060B1 - Kontrolle eines Abgasrückführungssystems - Google Patents
Kontrolle eines Abgasrückführungssystems Download PDFInfo
- Publication number
- EP0935060B1 EP0935060B1 EP19990100558 EP99100558A EP0935060B1 EP 0935060 B1 EP0935060 B1 EP 0935060B1 EP 19990100558 EP19990100558 EP 19990100558 EP 99100558 A EP99100558 A EP 99100558A EP 0935060 B1 EP0935060 B1 EP 0935060B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- exhaust gas
- gas feedback
- temperature
- gas recirculation
- engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D21/00—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
- F02D21/06—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air
- F02D21/08—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of engine
-
- 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
-
- 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
- F02M26/42—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders
- F02M26/43—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders in which exhaust from only one cylinder or only a group of cylinders is directed to the intake of the engine
-
- 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
- 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
- F02M2026/001—Arrangements; Control features; Details
- F02M2026/004—EGR valve controlled by a temperature signal or an air/fuel ratio (lambda) signal
-
- 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
-
- 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
Definitions
- the invention relates to a method for operating an exhaust gas recirculation device an internal combustion engine, especially an exhaust gas turbocharged, where the exhaust gas from one with the exhaust ducts of the cylinder head of the internal combustion engine connected exhaust manifold in the flow direction in front of the turbine of the exhaust gas turbocharger through an exhaust gas recirculation line with an on Check valve of a charge air line behind the compressor of the Exhaust gas turbocharger can be fed and continues in the exhaust gas recirculation line an exhaust gas recirculation control valve is turned on.
- the invention relates to a correspondingly trained device.
- Such an exhaust gas recirculation device is from DE-A 195 21 573 known.
- This system is directly connected to the exhaust manifold a check valve is arranged, the output of which in the Exhaust gas recirculation line opens.
- the exhaust gas recirculation line opens into the charge air line, while still in the exhaust gas recirculation line an exhaust gas recirculation control valve is inserted.
- the check valve is cooled to increase operational safety and to the Coolant circuit of the internal combustion engine connected. controlled the exhaust gas recirculation rate is primarily due to that as a flutter valve trained check valve depending on the exhaust gas pressure.
- the exhaust gas recirculation is still provided for certain Operating states (lower partial load) through the exhaust gas recirculation control valve to prevent.
- Other control devices are with this System not provided.
- US 52 39 971 is a method for Operating an exhaust gas recirculation device of an internal combustion engine known, the exhaust gas temperature difference between open and closed exhaust gas recirculation control valve detected and one Control unit is fed. It is this internal combustion engine an uncharged, spark-ignited internal combustion engine.
- the invention has for its object a method for operating an exhaust gas recirculation device and a correspondingly designed Exhaust gas recirculation device for an internal combustion engine to provide, which is improved over the prior art and in particular, more precise control of the exhaust gas recirculation rate allows.
- the exhaust gas recirculation control valve and the check valve are included advantageously arranged so that in the direction of flow of the return Exhaust gas first the exhaust gas recirculation control valve and then first installed the check valve in the exhaust gas recirculation line are. It is then with this circuit arrangement so that critical temperatures reliably at the check valve can be avoided, although also with the reverse Circuit arrangement reliable protection of the check valve is reached when setting the limit temperature defined temperature gradient from the check valve to the Exhaust gas recirculation control valve is taken into account.
- This regulation lies based on the consideration that sufficient heat-resistant exhaust gas recirculation control valves are available and therefore none for them special protective measures are necessary.
- a further development of the invention provides the function of the entire exhaust gas recirculation system and in particular the function of the check valve, the exhaust gas recirculation control valve and possibly an exhaust gas recirculation cooler check and a detected error in an error memory save or display.
- This monitoring and fault storage is that appropriate measuring sensors anyway are available, practically without additional effort.
- a further development provides that the storable Correction value in an exhaust gas recirculation correction map Can be saved independently of the exhaust gas recirculation basic map and the exhaust gas recirculation correction map is learnable.
- a basic map is thus assumed for the control and only if this is not applicable in the special case, becomes independent a correction value is saved by this, with which the Basic map value is corrected.
- This correction value can be dependent corrected by different circumstances mentioned later and saved (learning ability).
- This adaptive correction or regulation is terminated immediately if one of the conditions a), b) or c) is no longer met.
- the water flow through a Exhaust gas recirculation cooler depending on the exhaust gas recirculation temperature controlled.
- the exhaust gas recirculation temperature during cold start and warm-up as well as during prolonged operation in the low load range with a warm engine, to raise the combustion chamber temperature.
- the self-igniting internal combustion engine 1 has a total six cylinders 2, with an exhaust manifold on the cylinder head 3 and a charge air line 4 are connected.
- the Exhaust manifold 3 has two branches 5a, 5b, with the branches 6a, 6b to those embedded in the cylinder head and each cylinder 2 associated exhaust ports are connected.
- the two branches 5a, 5b open out via corresponding connecting lines into a common turbine chamber 7-of an exhaust gas turbocharger 8th.
- the compressor 10 sucks the one to be supplied to the internal combustion engine 1 Combustion air from the environment via a suction filter 11 and guides the compressed air via a charge air cooler 12 of the charge air line 4 to.
- an exhaust pipe opens into the one before exhaust muffler 13, from which the exhaust gas into the Environment or other cleaning facilities flows.
- the exhaust gas recirculation line 14 initially has an exhaust gas recooler 16 and in its further course, shortly before entering the charge air line 4, an exhaust gas recirculation control valve 17 and a check valve 18 on.
- a temperature sensor that measures the exhaust gas temperature is in the embodiment directly before Exhaust gas recirculation control valve 17 inserted into the exhaust gas recirculation line 14, can also in the exhaust gas recirculation control valve 17, the further Connection to the check valve 18 or the check valve 18 be integrated.
- the exhaust gas recirculation control valve 17 is operated by a control electronics 15 depending on engine data including the measured values of the thermocouple 19 controlled while the Check valve 18 with its check valves for cooling them used in the charge air line 4 in the area of the entry of the charge air is.
- a charge air target temperature map 20 is read out from a charge air target temperature map 20 and fed to a test device 21. Furthermore, the test device 21 is supplied with further variables 21a, for example the target exhaust gas recirculation temperature and the actual exhaust gas recirculation temperature, for evaluation. This determines whether the actual charge air temperature corresponds to the charge air target temperature, taking into account a tolerance range, after reaching the operating temperature and if the engine is in a steady operating state (claim 4). If this is not the case, the exhaust gas recirculation system cannot be used due to the presence of an error and switches 22 and 23 are switched to the positions shown.
- variables 21a for example the target exhaust gas recirculation temperature and the actual exhaust gas recirculation temperature
- an opening value for the exhaust gas recirculation control valve 17 is read out again as a function of the current engine speed n and the current injection quantity m E from an exhaust gas recirculation basic map 24 and, if appropriate, overlaid with fixed engine-specific corrections 25.
- the exhaust gas recirculation control valve 17 is then only actuated with this corrected opening value 25a. So this is a basic control that is always possible.
- the corresponding exhaust gas recirculation setpoint temperature map 26 is read out from an exhaust gas recirculation setpoint temperature map. This is compared with the current exhaust gas recirculation actual temperature value T EGR and the difference, taking into account a predefined tolerance range, is fed to the controller 27 now controlled by the switch 22. Thus, in this stage, the corrected opening value 25a is corrected with the difference 26a from the target exhaust gas recirculation temperature value and the actual exhaust gas recirculation temperature value via the controller 27.
- the (possibly) stored value 28a is read from an exhaust gas recirculation correction map 28 as a function of the current engine speed n and the current injection quantity m E and added to the corrected opening value 25a in front of the switch 22.
- a comparator 29 it is determined in a comparator 29 whether the difference 26a is for a time T rule is within a temperature window T diff. If this is the case, the switch 30 is flipped to the position not shown, so that a new value, which is the difference between the corrected opening value 25a and the controller value 27a, is fed to the exhaust gas recirculation correction map 28 and stored.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Description
- Fig. 1:
- eine schematische Ansicht einer aufgeladenen Brennkraftmaschine mit angebauter Abgasrückführeinrichtung und
- Fig. 2:
- ein Flußschaubild der Verfahrensschritte der adaptiven Abgasrückführregelung.
Claims (10)
- Verfahren zum Betreiben einer Abgasrückführungseinrichtung einer abgasturboaufgeladenen Brennkraftmaschine, bei der das Abgas von einer mit den Auslaßkanälen (6a, 6b) des Zylinderkopfs der Brennkraftmaschine verbundenen Abgassammelleitung (3) in Strömungsrichtung vor der Turbine (7) des Abgasturboladers durch eine Abgasrückführleitung (14) mit einem eingeschalteten Rückschlagventil (18) einer Ladeluftleitung hinter dem Verdichter (10) des Abgasturboladers zuführbar ist und in die Abgasrückführleitung weiterhin ein Abgasrückführsteuerventil (17) eingeschaltet ist,
dadurch gekennzeichnet, daß die Temperatur des Abgases in der Abgasrückführleitung (14) in Strömungsrichtung vor dem Rückschlagventil (18) erfaßt und einem Steuergerät (15) zugeführt wird und daß das Abgasrückführsteuerventil (17) bei Überschreitung einer vorgebbaren Grenztemperatur des Abgases regelbar schließbar ist. - Verfahren zum Betreiben einer Abgasrückführungseinrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß die Funktionen des Abgasrückführungssystems mit dem Rückschlagventil (18), dem Abgasrückführsteuerventil (17) und einem Abgasrückführkühler (16) in einer Prüfvorrichtung (21) ständig kontrolliert werden und eine Fehlererkennung in einem Fehlerspeicher abgespeichert und/oder angezeigt wird. - Verfahren zum Betreiben einer Abgasrückführungseinrichtung nach Anspruch 2,
dadurch gekennzeichnet, daß eine Fehlerbewertung nur bei dem additiven Vorhandensein folgender Randbedingungen I und II erfolgt:I.a) betriebswarmer Motor (Kühlmitteltemperatur und/oder Öltemperatur > x °C),b) stationärer Motorbetrieb (|ΔmE/Δt| < Y mg/sec und |Δn/Δt|< X U/min/sec mit mE ≙ Einspritzmenge; t ≙ Zeit; n ≙ Motordrehzahl).c) der Differenzbetrag aus Ladeluft-Ist-Temperatur und der in einem Kennfeld gespeicherten Ladeluft-Soll-Temperatur TLL Soll = f(n, mE) liegt innerhalb einer vorgegebenen Toleranzbreite.II. Die aktuelle Abgasrückführungs-lst-Temperatur wird in einem Motorbetriebspunkt mit einer in einem Abgasrückführungs-Soll-Temperaturkennfeld tAGR = f(n, mE) abgelegten Abgasrückführungs-Soll-Temperatur verglichen und bei einer vorgebbaren Abweichung in diesem Motorbetriebspunkt ein Fehler erkannt. - Verfahren zum Betreiben einer Abgasrückführungseinrichtung nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, daß die aktuelle Abgasrückführungs-Temperatur TAGR ist in einem Motorbetriebspunkt mit einer in einem Abgasrückführungs-Soll-Temperaturkennfeld tAGR = f(n, mE) (26) abgespeicherten Soll-Temperatur verglichen wird und bei einer vorgebbaren Abweichung in diesem Motorbetriebspunkt die aus einem Abgasrückführungs-Grundkennfeld (24) vorgegebene Öffnung des Abgasrückführsteuerventils (17) mit einem speicherbaren Korrekturwert (28a), welcher von der Abweichung der Abgasrückführungs-lst-Temperatur gegenüber der Abgasrückführungs-Soll-Temperatur abhängig ist, korrigiert wird. - Verfahren zum Betreiben einer Abgasrückführungseinrichtung nach Anspruch 3,
dadurch gekennzeichnet, daß der speicherbare Korrekturwert (28a) in einem Abgasrückführungs-Korrekturkennfeld (28) unabhängig von dem Abgasrückführungs-Grundkennfeld (24) speicherbar und das Abgasrückführungs-Korrekturkennfeld (28) lernfähig ist. - Verfahren zum Betreiben einer Abgasrückführungseinrichtung nach Anspruch 4 oder 5,
dadurch gekennzeichnet, daß eine Korrektur nur bei dem additiven Vorhandensein folgender Randbedingungen erfolgt:a) es liegt kein Fehler vor (Anspruch 3),b) stationärer Motorbetrieb (|ΔmE/Δt| < Y0 mg/sec und |Δn/Δt|< X0 U/min/sec).c) der Differenzbetrag aus Ladeluft-Ist-Temperatur und der in einem Ladeluft-Soll-Kennfeld (20) gespeicherten Ladeluft-Soll-Temperatur TLL Soll = f(n, mE) liegt innerhalb einer vorgegebenen Toleranzbreite. - Verfahren zum Betreiben einer Abgasrückführungseinrichtung nach Anspruch 6,
dadurch gekennzeichnet, daß die Korrektur in der Form vorgenommen wird, daß die Abgasrückführungs-Ist-Temperatur TAGR ist mit einer in einem Abgasrückführungs-Soll-Temperaturkennfeld (26) gespeicherten Abgasrückführungs-Soll-Temperatur TAGR = f(n, mE) verglichen wird, die Temperaturdifferenz einem Regler (27) zugeführt werden, der eine korrigierte Öffnung des Abgasrückführsteuerventils (17) einregelt, wenn die ermittelte Temperaturdifferenz während einer Zeit Tregel innerhalb eines Temperaturfensters Tdiff Soll liegt. - Verfahren zum Betreiben einer Abgasrückführungseinrichtung nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, daß der Wasserdurchfluß durch einen Abgasrückkühler (16) in Abhängigkeit der Abgasrückführungs-Temperatur gesteuert wird. - Verfahren zum Betreiben einer Abgasrückführungseinrichtung nach Anspruch 5,
dadurch gekennzeichnet, daß die Abgasrückführungs-Temperatur beim Kaltstart und Warmlauf sowie bei längerem Betrieb im Niedriglastbereich bei warmem Motor erhöht wird, um die Brennraumtemperatur anzuheben. - Abgasrückführungseinrichtung einer abgasturboaufgeladenen Brennkraftmaschine, bei der das Abgas von einer mit den Auslaßkanälen (6a, 6b) des Zylinderkopfs der Brennkraftmaschine verbundenen Abgassammelleitung (3) in Strömungsrichtung vor der Turbine (7) des Abgasturboladers durch eine Abgasrückführleitung (14) mit einem eingeschalteten Rückschlagventil (18) einer Ladeluftleitung hinter dem Verdichter (10) des Abgasturboladers zuführbar ist und in die Abgasrückführleitung weiterhin ein Abgasrückführsteuerventil (17) eingeschaltet ist,
dadurch gekennzeichnet, daß die Abgasrückführungseinrichtung entsprechend jedem der einzelnen Verfahrensschritte ausgebildet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1998104968 DE19804968A1 (de) | 1998-02-07 | 1998-02-07 | Kontrolle eines Abgasrückführungssystems |
DE19804968 | 1998-02-07 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0935060A2 EP0935060A2 (de) | 1999-08-11 |
EP0935060A3 EP0935060A3 (de) | 2000-06-07 |
EP0935060B1 true EP0935060B1 (de) | 2002-07-03 |
Family
ID=7856997
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19990100558 Expired - Lifetime EP0935060B1 (de) | 1998-02-07 | 1999-01-12 | Kontrolle eines Abgasrückführungssystems |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0935060B1 (de) |
AT (1) | ATE220175T1 (de) |
DE (2) | DE19804968A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2888883B1 (fr) * | 2005-07-25 | 2011-05-27 | Valeo Sys Controle Moteur Sas | Procede de protection d'une vanne de recirculation de gaz d'echappement, et dispositif de mise en oeuvre |
FR2919023B1 (fr) * | 2007-07-17 | 2009-09-04 | Renault Sas | Systeme de controle d'un moteur a combustion interne avec recirculation partielle des gaz d'echappement et procede de protection thermique de la vanne de regulation de debit des gaz d'echappement recycles |
DE102010002605B4 (de) | 2010-03-05 | 2013-12-12 | Ford Global Technologies, Llc | Verfahren zur Verkürzung der Warmlaufphase mittels Wärmerückgewinnung aus rückgeführten Abgasen |
JP5447334B2 (ja) | 2010-10-25 | 2014-03-19 | トヨタ自動車株式会社 | 排気還流装置の異常検出装置 |
FR3025838B1 (fr) * | 2014-09-15 | 2020-06-19 | Renault S.A.S | Procede de regulation de la consommation en air d'un moteur a combustion interne en vue de limiter une temperature de gaz brules recycles |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6185562A (ja) * | 1984-10-02 | 1986-05-01 | Suzuki Motor Co Ltd | 排気ガス環流装置 |
DE3720942C2 (de) * | 1986-07-08 | 1995-03-16 | Volkswagen Ag | Regelsystem für eine aufgeladene Brennkraftmaschine |
JPH0799123B2 (ja) * | 1988-05-19 | 1995-10-25 | 三菱電機株式会社 | Egrシステムの異常検出装置 |
DE4121071C2 (de) * | 1991-06-26 | 2001-11-08 | Bosch Gmbh Robert | Abgasrückführungssystem bei einer Brennkraftmaschine |
US5239971A (en) * | 1991-08-03 | 1993-08-31 | Mitsubishi Denki K.K. | Trouble diagnosis device for exhaust gas recirculation system |
US5303168A (en) * | 1991-10-31 | 1994-04-12 | Ford Motor Company | Engine operation to estimate and control exhaust catalytic converter temperature |
JPH0835449A (ja) * | 1994-07-25 | 1996-02-06 | Mitsubishi Electric Corp | 排気ガス還流制御装置の故障検出装置 |
JP3460338B2 (ja) * | 1994-10-31 | 2003-10-27 | 株式会社デンソー | 内燃機関の排気還流制御装置 |
DE19521573C2 (de) | 1995-06-14 | 1998-05-28 | Man Nutzfahrzeuge Ag | Abgasrückführung an einer aufgeladenen Brennkraftmaschine |
-
1998
- 1998-02-07 DE DE1998104968 patent/DE19804968A1/de not_active Withdrawn
-
1999
- 1999-01-12 EP EP19990100558 patent/EP0935060B1/de not_active Expired - Lifetime
- 1999-01-12 AT AT99100558T patent/ATE220175T1/de active
- 1999-01-12 DE DE59901886T patent/DE59901886D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0935060A2 (de) | 1999-08-11 |
DE19804968A1 (de) | 1999-08-12 |
ATE220175T1 (de) | 2002-07-15 |
EP0935060A3 (de) | 2000-06-07 |
DE59901886D1 (de) | 2002-08-08 |
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