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Method for adjusting a reductant used in an internal combustion engine to reduce NOx

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • B01D-053/56
출원번호 US-0186690 (2002-07-01)
등록번호 US-7320781 (2008-01-22)
발명자 / 주소
  • Lambert,Christine Kay
  • Adams,Karen Marie
  • Hammerle,Robert Henry
출원인 / 주소
  • Lambert,Christine Kay
  • Adams,Karen Marie
  • Hammerle,Robert Henry
대리인 / 주소
    Brehob,Diana D.
인용정보 피인용 횟수 : 11  인용 특허 : 16

초록

A method for controlling reductant injection into an exhaust stream upstream of a catalyst coupled to an internal combustion engine is disclosed. In the method, an ammonia sensor located downstream of the exhaust catalyst is used to determine ammonia concentration in the exhaust stream. The ammonia

대표청구항

We claim: 1. A method for controlling reductant injection into a catalyst coupled to an internal combustion engine, the method comprising: determining a reductant fraction based on an amount of reductant used in the catalyst and an amount of the reductant passing through the catalyst, said fraction

이 특허에 인용된 특허 (16)

  1. Krishnamurthy Sowmithri (Cherry Hill NJ) McWilliams John P. (Woodbury NJ) Pappal David A. (Sewell NJ) Sigal Catherine T. (Pennington NJ) Kiliany ; Jr. Thomas R. (Baytown TX), Abatement of NOx in exhaust gases.
  2. Watanabe Tsuyoshi (Kure JPX), Apparatus for removing NOx from a gas.
  3. Polcer John (Brookside NJ), Catalytic denitrification control process and system for combustion flue gases.
  4. Krigmont Henry V. (Seal Beach CA) Kozacka Wayne R. (Laguna Hills CA) Spokoyny Felix E. (Costa Mesa CA), Control of NOx reduction in flue gas flows.
  5. Fulton Brien Lloyd ; Vantine Katie Jo ; Goodliff Simon, Emission control system.
  6. Hammerle Robert Henry ; Adams Karen Marie ; Laing Paul Matthew, Emission control system.
  7. van Nieuwstadt Michiel Jacques ; Syed Fazal Urrahman. ; Vanderslice John H. ; Hashemi Siamak, Emission control system.
  8. Hammerle Robert Henry ; Adams Karen Marie ; Laing Paul Matthew, Emission control system with a catalyst.
  9. Daudel Helmut (Schorndorf DEX) Marquardt Klaus-Jrgen (Remshalden DEX) Grtner Uwe (Weinstadt DEX), Exhaust gas aftertreatment device for internal combustion engines.
  10. Morsbach Bernd,DEX ; Daudel Helmut,DEX ; Gaertner Uwe,DEX, Lowering of the nitrogen oxide levels in exhaust gases by controlled addition of NH.sub.3.
  11. Matsuda Shimpei (Hitachi JA) Nakajima Fumito (Hitachi JA) Takeuchi Masato (Katsuta JA) Uno Shigeo (Hitachi JA) Kato Akira (Hitachi JA) Imanari Makoto (Ibaraki JA) Watanabe Yoshihisa (Ibaraki JA), Method and apparatus for determining ammonia concentration of gas.
  12. Dahlheim Christian (Berlin DEX) Fleischer Maximilian (Hoehenkirchen DEX) Meixner Hans (Haar DEX), Method for reducing the nitrogen oxide concentration in the exhaust of an internal combustion engine or of a firing syst.
  13. Brand Reinhold (Hanau DEX) Engler Bernd (Hanau DEX) Kleine-Moellhoff Peter (Alzenau DEX) Koberstein Edgar (Alzenau DEX), Method for the catalytic removal of nitrogen oxides from exhaust gases by means of a reducing agent.
  14. Michalak Stanislaw (Hespert DEX) Weber Klaus-Dieter (Reichshof DEX) Meier Jrgen (Wiehl DEX), Method of regulating the amount of reducing agent added during catalytic reduction of NOx contained in flu.
  15. Kato Nobuhide,JPX ; Kurachi Hiroshi,JPX, Method of removing NO.sub.x from exhaust gases.
  16. Eichholtz Hans A. (Recklinghausen DEX) Weiler Helmut A. (Velbert DEX), Method of removing oxides of nitrogen from flue gas.

이 특허를 인용한 특허 (11)

  1. Chi, John N.; Wang, Weiwen; Garimella, Phanindra; Hill, Joe V., Apparatus, system, and method for controlling reductant dosing in an SCR catalyst system.
  2. Garimella, Phanindra; Osburn, Andy; Chi, John N.; Wills, Joan M., Apparatus, system, and method for estimating an NOx conversion efficiency of a selective catalytic reduction catalyst.
  3. Chi, John N.; Hill, Joe V.; Wills, Joan M.; Farrell, Lisa A.; Frazier, Timothy R.; Mohammed, Hasan, Apparatus, system, and method for reducing NOx emissions from an engine system.
  4. Wills, Joan M.; Chi, John N.; Wang, Weiwen; Garimella, Phanindra; Frazier, Timothy R.; Ofoli, Abdul R.; Hill, Joe V.; Farrell, Lisa A.; Currier, Neal W.; Yezerets, Aleksey; Osburn, Andy, Apparatus, system, and method for reducing NOx emissions on an SCR catalyst.
  5. Farrell, Lisa A.; Frazier, Timothy R.; Mohammed, Hasan, Engine system properties controller.
  6. Ettireddy, Padmanabha Reddy; Henrichsen, Matthew, Low temperature selective catalytic reduction catalyst and associated systems and methods.
  7. Bauer, Peter; Bentz, Rainer; Fokkelman, Joris; Frank, Joachim; Ketterl, Hermann; Koops, Ingo; Leinfelder, Robert, Method for detecting the minimum opening time of a reducing agent feed device in an exhaust gas aftertreatment system comprising an SCR catalyst.
  8. Kraemer, Gilbert Otto; Frederick, Garth Curtis, Model-based tuning of ammonia distribution and control for reduced operating cost of selective catalytic reduction.
  9. Lueders, Hartmut; Walz, Christian; Loehr, Matthias, Procedure and device to monitor an exhaust gas after-treatment system.
  10. Ofoli, Abdul R.; Mohammed, Hasan, SCR catalyst ammonia surface coverage estimation and control.
  11. Ofoli, Abdul R.; Mohammed, Hasan, SCR catalyst ammonia surface coverage estimation and control.

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