EP0903477A3 - Regeneration method of a nitrogen oxides trap in the exhaust system of an internal combustion engine - Google Patents

Regeneration method of a nitrogen oxides trap in the exhaust system of an internal combustion engine Download PDF

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Publication number
EP0903477A3
EP0903477A3 EP98113275A EP98113275A EP0903477A3 EP 0903477 A3 EP0903477 A3 EP 0903477A3 EP 98113275 A EP98113275 A EP 98113275A EP 98113275 A EP98113275 A EP 98113275A EP 0903477 A3 EP0903477 A3 EP 0903477A3
Authority
EP
European Patent Office
Prior art keywords
nitrogen oxide
internal combustion
combustion engine
lean
oxide trap
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
Application number
EP98113275A
Other languages
German (de)
French (fr)
Other versions
EP0903477B1 (en
EP0903477A2 (en
Inventor
Patrick Dr. Phlips
Klemens Grieser
Roland Erdmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ford Global Technologies LLC
Original Assignee
Ford Global Technologies LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ford Global Technologies LLC filed Critical Ford Global Technologies LLC
Publication of EP0903477A2 publication Critical patent/EP0903477A2/en
Publication of EP0903477A3 publication Critical patent/EP0903477A3/en
Application granted granted Critical
Publication of EP0903477B1 publication Critical patent/EP0903477B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
    • F01N3/0842—Nitrogen oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
    • 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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
    • F02D41/0275—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a NOx trap or adsorbent
    • 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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1446—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being exhaust temperatures
    • 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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/146—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration
    • F02D41/1461—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration of the exhaust gases emitted by the engine
    • F02D41/1462—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration of the exhaust gases emitted by the engine with determination means using an estimation
    • 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
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D2041/389—Controlling fuel injection of the high pressure type for injecting directly into the cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/08—Exhaust gas treatment apparatus parameters
    • F02D2200/0806—NOx storage amount, i.e. amount of NOx stored on NOx trap
    • 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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
    • F02D41/187—Circuit arrangements for generating control signals by measuring intake air flow using a hot wire flow sensor

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

Die Erfindung betrifft ein Verfahren zur Regeneration einer Stickoxidfalle (16) im Abgassystem eines Verbrennungsmotors (10) mit einer elektronischen Motorsteuerung (12), durch die abhängig von einer Vielzahl von Motorbetriebsparametern bestimmt wird, ob dem Verbrennungsmotor ein mageres oder ein im wesentlichen stöchiometrisches Luft-/Kraftstoffgemisch zugeführt wird und durch die unter vorgegebenen ersten Auslösebedingungen ein Grundregenerationszyklus der Stickoxidfalle ausgelöst wird. Bei einem Übergang vom mageren in den stöchiometrischen Betriebsmodus und bei einem Vorliegen von vorgegebenen zweiten Auslösebedingungen wird ein Zusatzregenerationszyklus der Stickoxidfalle ausgelöst. Damit wird eine unkontrollierte Freisetzung von gespeicherten Stickoxiden aus der Stickoxidfalle vermieden. Der Zusatzregenerationszyklus wird vorzugsweise nur dann ausgelöst, wenn die aufgenommene Stickoxidmenge (X) einen bestimmten Schwellwert hat und der Übergang in den stöchiometrischen Betrieb aus einem vorgegebenen Teilbereich des Mager-Drehzahl-/Drehmomentbereichs erfolgt.

Figure 00000001
The invention relates to a method for regenerating a nitrogen oxide trap (16) in the exhaust system of an internal combustion engine (10) with an electronic engine control (12), by means of which, depending on a large number of engine operating parameters, it is determined whether the internal combustion engine is lean or essentially stoichiometric. / Fuel mixture is supplied and a basic regeneration cycle of the nitrogen oxide trap is triggered under the predetermined first triggering conditions. An additional regeneration cycle of the nitrogen oxide trap is triggered in the event of a transition from the lean to the stoichiometric operating mode and in the presence of predetermined second triggering conditions. This avoids an uncontrolled release of stored nitrogen oxides from the nitrogen oxide trap. The additional regeneration cycle is preferably only triggered when the amount of nitrogen oxide (X) consumed has a certain threshold value and the transition to stoichiometric operation takes place from a predetermined subrange of the lean speed / torque range.
Figure 00000001
EP98113275A 1997-09-18 1998-07-16 Regeneration method of a nitrogen oxides trap in the exhaust system of an internal combustion engine Expired - Lifetime EP0903477B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19741079 1997-09-18
DE19741079A DE19741079C2 (en) 1997-09-18 1997-09-18 Process for the regeneration of a nitrogen oxide trap in the exhaust system of an internal combustion engine

Publications (3)

Publication Number Publication Date
EP0903477A2 EP0903477A2 (en) 1999-03-24
EP0903477A3 true EP0903477A3 (en) 2000-03-08
EP0903477B1 EP0903477B1 (en) 2002-03-20

Family

ID=7842756

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98113275A Expired - Lifetime EP0903477B1 (en) 1997-09-18 1998-07-16 Regeneration method of a nitrogen oxides trap in the exhaust system of an internal combustion engine

Country Status (3)

Country Link
EP (1) EP0903477B1 (en)
JP (1) JP4099272B2 (en)
DE (2) DE19741079C2 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3259711B2 (en) * 1999-05-18 2002-02-25 トヨタ自動車株式会社 Control device for internal combustion engine
DE10020789C2 (en) * 1999-05-19 2003-05-08 Ford Global Tech Inc Method and system for the transition between lean and stoichiometric air-fuel ratio in a lean-burn engine
JP3854013B2 (en) 1999-06-10 2006-12-06 三菱電機株式会社 Exhaust gas purification device for internal combustion engine
DE19932301A1 (en) * 1999-07-10 2001-01-11 Volkswagen Ag Method for regulating a regeneration of a storage catalytic converter arranged in an exhaust gas duct of an internal combustion engine
DE19942270A1 (en) * 1999-09-04 2001-03-15 Bosch Gmbh Robert Method for operating an internal combustion engine
JP2001082135A (en) * 1999-09-09 2001-03-27 Toyota Motor Corp Exhaust emisson control device for internal combustion engine
DE19963938A1 (en) * 1999-12-31 2001-07-12 Bosch Gmbh Robert Method for operating a three-way catalytic converter of an internal combustion engine
DE10054005A1 (en) 2000-11-01 2002-05-08 Daimler Chrysler Ag The system to clean exhaust gas emissions from an IC motor has a nitrogen oxide accumulator, and desulfurizing operating in full and partial modes according to registered temperatures
US6915630B2 (en) * 2003-01-27 2005-07-12 Ford Global Technologies, Llc Engine control for a vehicle equipped with an emission control device
EP2836688B1 (en) * 2012-04-10 2016-08-17 Volvo Lastvagnar AB A self-diagnosing method for diagnosing a scr system
DE202013008389U1 (en) * 2013-09-21 2014-12-22 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Control arrangement for controlling an internal combustion engine of a motor vehicle
JP6248978B2 (en) * 2015-05-11 2017-12-20 トヨタ自動車株式会社 Control device for internal combustion engine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0585900A1 (en) * 1992-09-02 1994-03-09 Toyota Jidosha Kabushiki Kaisha An exhaust gas purification device of an engine
EP0598917A1 (en) * 1992-06-12 1994-06-01 Toyota Jidosha Kabushiki Kaisha Exhaust emission control system for internal combustion engine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69326417T2 (en) * 1992-06-12 2000-04-13 Toyota Motor Co Ltd EXHAUST EMISSION CONTROL SYSTEM FOR COMBUSTION ENGINES
DE19626837A1 (en) * 1995-07-08 1997-01-09 Volkswagen Ag Operating diesel engine with nitrogen oxide buffer store - blocks buffer store during operation at low nitrogen oxide content per time unit
DE19607151C1 (en) * 1996-02-26 1997-07-10 Siemens Ag Regeneration of nitrogen oxide storage catalyst

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0598917A1 (en) * 1992-06-12 1994-06-01 Toyota Jidosha Kabushiki Kaisha Exhaust emission control system for internal combustion engine
EP0585900A1 (en) * 1992-09-02 1994-03-09 Toyota Jidosha Kabushiki Kaisha An exhaust gas purification device of an engine

Also Published As

Publication number Publication date
JP4099272B2 (en) 2008-06-11
EP0903477B1 (en) 2002-03-20
DE59803414D1 (en) 2002-04-25
DE19741079C2 (en) 2001-10-18
DE19741079A1 (en) 1999-04-01
EP0903477A2 (en) 1999-03-24
JPH11148338A (en) 1999-06-02

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