Method and device for controlling an exhaust treatment system
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F01N-003/00
출원번호
US-0250716
(2001-12-22)
우선권정보
DE-101 00 420(2001-01-08)
국제출원번호
PCT/DE01/004923
(2001-12-22)
§371/§102 date
20031120
(20031120)
국제공개번호
WO02/053888
(2002-07-11)
발명자
/ 주소
Ripper,Wolfgang
Mahr,Bernd
Wickert,Stefan
출원인 / 주소
Robert Bosch GmbH
대리인 / 주소
Kenyon &
인용정보
피인용 횟수 :
17인용 특허 :
13
초록▼
A device and a method for controlling an exhaust-gas aftertreatment system, e.g., for an internal combustion engine, are described. The exhaust-gas aftertreatment system includes at least one catalytic converter. A preselectable quantity of reducing agent is supplied to the exhaust-gas aftertreatmen
A device and a method for controlling an exhaust-gas aftertreatment system, e.g., for an internal combustion engine, are described. The exhaust-gas aftertreatment system includes at least one catalytic converter. A preselectable quantity of reducing agent is supplied to the exhaust-gas aftertreatment system as a function of the state of the internal combustion engine and/or the exhaust-gas aftertreatment system. The quantity of reducing agent supplied is adjusted.
대표청구항▼
What is claimed is: 1. A method for controlling an exhaust-gas aftertreatment system of an internal combustion engine, the exhaust-gas aftertreatment system having at least one catalytic converter, the method comprising: supplying a selected quantity of a reducing agent to the exhaust-gas aftertrea
What is claimed is: 1. A method for controlling an exhaust-gas aftertreatment system of an internal combustion engine, the exhaust-gas aftertreatment system having at least one catalytic converter, the method comprising: supplying a selected quantity of a reducing agent to the exhaust-gas aftertreatment system as a function of a state of at least one of the internal combustion engine and the exhaust-gas aftertreatment system; measuring a first measured quantity and a second measured quantity downstream of the exhaust-gas aftertreatment system; adjusting the quantity of the reducing agent supplied as a function of the first measured quantity and the second measured quantity, wherein the first measured quantity depends on at least one of the concentration of substances required for conversion of exhaust gas and the concentration of resulting undesired intermediate products, and wherein the second measured quantity depends on the concentration of substances that are one of not converted in the exhaust-gas aftertreatment system and only partially converted in the exhaust-gas aftertreatment system; wherein the quantity of the reducing agent is decreased when the first measured quantity exceeds a first upper threshold value; and wherein the quantity of the reducing agent is increased when the second measured quantity exceeds a second upper threshold value. 2. The method according to claim 1, wherein the second measured quantity characterizes a nitrogen oxide concentration in the exhaust gas downstream from the exhaust-gas aftertreatment system. 3. The method according to claim 1, wherein the first measured quantity characterizes a quantity of ammonia in the exhaust gas downstream from the exhaust-gas aftertreatment system. 4. The method according to claim 1, wherein the first upper threshold value and the second upper threshold value are specified as a function of at least one of the operating state of the internal combustion engine and the operating state of the exhaust-gas aftertreatment system. 5. The method according to claim 4, wherein the first and second upper threshold values are specified in certain operating states. 6. A device for controlling an exhaust-gas aftertreatment system of an internal combustion engine, the exhaust-gas aftertreatment system having at least one catalytic converter, the device comprising: an arrangement for supplying a selected quantity of a reducing agent to the exhaust-gas aftertreatment system as a function of a state of at least one of the internal combustion engine and the exhaust-gas aftertreatment system; an arrangement for measuring a first measured quantity downstream of the exhaust-gas aftertreatment system; an arrangement for measuring a second measured quantity downstream of the exhaust-gas aftertreatment system; and an arrangement for adjusting the quantity of the reducing agent supplied as a function of the first measured quantity and the second measured quantity, wherein the first measured quantity depends on at least one of the concentration of substances required for conversion of exhaust gas and the concentration of resulting undesired intermediate products, and wherein the second measured quantity depends on the concentration of substances that are one of not converted in the exhaust-gas aftertreatment system and only partially converted in the exhaust-gas aftertreatment system; wherein the quantity of the reducing agent is decreased when the first measured quantity exceeds a first upper threshold value, and wherein the quantity of the reducing agent is increased when the second measured quantity exceeds a second upper threshold value. 7. A computer-readable medium having stored thereon instructions for execution on a computer for controlling an internal combustion engine having an exhaust-gas aftertreatment system, the instructions, upon execution on the computer, performing: control of a supply of a selected quantity of a reducing agent to the exhaust-gas aftertreatment system as a function of a state of at least one of the internal combustion engine and the exhaust-gas aftertreatment system; control of measuring a first measured quantity and a second measured quantity downstream of the exhaust-gas aftertreatment system; and control of adjusting the quantity of the reducing agent supplied as a function of the first measured quantity and the second measured quantity, wherein the first measured quantity depends on at least one of the concentration of substances required for conversion of exhaust gas and the concentration of resulting undesired intermediate products, and wherein the second measured quantity depends on the concentration of substances that are one of not converted in the exhaust-gas aftertreatment system and only partially converted in the exhaust-gas aftertreatment system; wherein the quantity of the reducing agent is decreased when the first measured quantity exceeds a first upper threshold value, and wherein the quantity of the reducing agent is increased when the second measured quantity exceeds a second upper threshold value. 8. A computer-readable data storage element for storing a computer program having a plurality of instruction codes executable by a computer for controlling an internal combustion engine having an exhaust-gas aftertreatment system, the instruction codes performing: control of a supply of a selected quantity of a reducing agent to the exhaust-gas aftertreatment system as a function of a state of at least one of the internal combustion engine and the exhaust-gas aftertreatment system; control of measuring a first measured quantity and a second measured quantity downstream of the exhaust-gas aftertreatment system; and control of adjusting the quantity of the reducing agent supplied as a function of the first measured quantity and the second measured quantity, wherein the first measured quantity depends on at least one of the concentration of substances required for conversion of exhaust gas and the concentration of resulting undesired intermediate products, and wherein the second measured quantity depends on the concentration of substances that are one of not converted in the exhaust-gas aftertreatment system and only partially converted in the exhaust-gas aftertreatment system; wherein the quantity of the reducing agent is decreased when the first measured quantity exceeds a first upper threshold value, and wherein the quantity of the reducing agent is increased when the second measured quantity exceeds a second upper threshold value.
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이 특허에 인용된 특허 (13)
Binder, Klaus; Ebel, Peter; Fraenkle, Gerhard; Funk, Alexander; Marquardt, Klaus-Juergen; Schaefer, Ansgar; Huthwohl, Georg; Maurer, Bernd, Device for exhaust-gas purification, and an operating and monitoring for said device.
van Nieuwstadt, Michiel Jacques, Method and apparatus for controlling the amount of reactant to be added to a substance using a sensor which is responsive to both the reactant and the substance.
Dolling Winfried,DEX, Method and apparatus for metering the introduction of a reducing agent into the exhaust-gas or exhaust-air stream of a combustion installation.
Emmerling Gerhard,DEX ; Zuther Frank,DEX ; Doring Andreas,DEX, Method for metering a reducing agent into NO.sub.x -containing exhaust gas of an internal combustion engine.
Chandler, Guy Richard; Rajaram, Raj Rao; Goersmann, Claus Friedrich; Self, Valerie Anne, Process and apparatus for reducing the nitrogen oxide content in exhaust gases by the controlled addition of NH3.
Bouchez, Mathias; Mabilon, Gil; Martin, Brigitte; Bourges, Patrick, Process and device intended for nitrogen oxides elimination in an exhaust line of an internal-combustion engine.
Arlt, Tino; Bauer, Peter; Fokkelman, Joris; Koops, Ingo, Method and device for controlling an SCR-exhaust gas after-treatment system of an internal combustion engine.
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.
Hehle, Marc; Müller, Ralf; Niemeyer, Jens; Remele, Jörg; Schäffner, Guido; Sinzenich, Holger; Späder, Tim, Method for model-based determination of a temperature distribution of an exhaust gas post-treatment unit.
Ripper, Wolfgang; Wickert, Stefan; Schaller, Johannes; Lueders, Hartmut; Walz, Christian; Mayer, Thorsten; Schernewski, Ralf; Loehr, Matthias; Schmeling, Ulf Peter, Method for operating a catalytic converter used for purifying the exhaust gas of an internal combustion engine and a device for implementing the method.
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