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1. WO1997031704 - PROCESS FOR REGENERATING AN NOx STORAGE CATALYTIC CONVERTER

Publication Number WO/1997/031704
Publication Date 04.09.1997
International Application No. PCT/DE1997/000278
International Filing Date 13.02.1997
IPC
B01D 53/94 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols
34Chemical or biological purification of waste gases
92of engine exhaust gases
94by catalytic processes
F01N 3/08 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
3Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
08for rendering innocuous
F02D 41/02 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
41Electrical control of supply of combustible mixture or its constituents
02Circuit arrangements for generating control signals
CPC
B01D 53/9409
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols,
34Chemical or biological purification of waste gases
92of engine exhaust gases
94by catalytic processes
9404Removing only nitrogen compounds
9409Nitrogen oxides
B01D 53/9495
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols,
34Chemical or biological purification of waste gases
92of engine exhaust gases
94by catalytic processes
9495Controlling the catalytic process
F01N 2250/12
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
2250Combinations of different methods of purification
12absorption or adsorption, and catalytic conversion
F01N 3/0842
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
3Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
08for rendering innocuous
0807by using absorbents or adsorbents
0828characterised by the absorbed or adsorbed substances
0842Nitrogen oxides
F02D 2200/0806
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
2200Input parameters for engine control
02the parameters being related to the engine
08Exhaust gas treatment apparatus parameters
0806NOx storage amount, i.e. amount of NOx stored on NOx trap
F02D 2200/0811
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
2200Input parameters for engine control
02the parameters being related to the engine
08Exhaust gas treatment apparatus parameters
0811NOx storage efficiency
Applicants
  • SIEMENS AKTIENGESELLSCHAFT [DE]/[DE] (AllExceptUS)
  • SCHÜRZ, Willibald [AT]/[DE] (UsOnly)
  • ACHLEITNER, Erwin [AT]/[DE] (UsOnly)
Inventors
  • SCHÜRZ, Willibald
  • ACHLEITNER, Erwin
Priority Data
196 07 151.826.02.1996DE
Publication Language German (de)
Filing Language German (DE)
Designated States
Title
(DE) VERFAHREN ZUR REGENERATION EINES NOx-SPEICHERKATALYSATORS
(EN) PROCESS FOR REGENERATING AN NOx STORAGE CATALYTIC CONVERTER
(FR) PROCEDE DE REGENERATION D'UN CATALYSEUR D'ACCUMULATION DE NOx
Abstract
(DE) Verfahren zur Regeneration eines NOx-Speicherkatalysators, bei dem eine Regenerationsphase gestartet wird, wenn der Speicherkatalysator mehr als eine vorgegebene Grenzmenge an NOx-Verbindungen ausstößt. Der NOx-Ausstoß wird in Abhängigkeit von der Last, der Drehzahl und weiteren Betriebsbedingungen der Brennkraftmaschine berechnet.
(EN) In the process for regenerating an NOx storage catalytic converter, a regeneration phase is initiated when the converter emits more than a predetermined threshold quantity of NOx compounds. NOx emission is calculated on the basis of load, engine speed and other operating conditions in the internal combustion engine.
(FR) Procédé de régénération d'un catalyseur d'accumulation de NOx, selon lequel une phase de régénération est lancée lorsque le catalyseur d'accumulation émet une quantité de composés NOx supérieure à une valeur limite prédéterminée. L'émission de NOx est calculée en fonction de la charge, du régime et d'autres conditions de fonctionnement du moteur à combustion interne.
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