EXHAUST GAS CLEANING SYSTEM HAVING INTERNAL AMMONIA PRODUCTION FOR REDUCING NITROGEN OXIDES
    41.
    发明申请
    EXHAUST GAS CLEANING SYSTEM HAVING INTERNAL AMMONIA PRODUCTION FOR REDUCING NITROGEN OXIDES 审中-公开
    氮氧化物还原内产氨排放控制系统

    公开(公告)号:WO00071868A1

    公开(公告)日:2000-11-30

    申请号:PCT/EP2000/002623

    申请日:2000-03-24

    Abstract: The invention relates to an exhaust gas cleaning system for at least removing nitrogen oxides contained in the exhaust gas of a combustion source. The inventive exhaust gas cleaning system comprises an ammonia producing catalytic converter (5) for producing ammonia by using constituents of at least a portion of the exhaust gas emitted by the combustion source (1) during operating phases in which ammonia is produced. The exhaust gas cleaning system also comprises a nitrogen oxide reduction catalytic converter (4) which is arranged downstream from the ammonia producing catalytic converter and which is provided for reducing nitrogen oxides contained in the emitted exhaust gas of the combustion source by using the produced ammonia as a reducing agent. According to the invention, a plasma generator (6) is connected upstream from said ammonia producing catalytic converter (5) and serves to produce, using plasma technology, reactive particles which consist of the constituents of the exhaust gas fed to the ammonia producing catalytic converter and which promote the ammonia producing reaction during operating phases in which ammonia is produced. This ensures an adequate production of ammonia also in the case of relatively low exhaust gas temperatures. The invention also relates to the use of said exhaust gas cleaning system, for example, for cleaning the waste gas of motor vehicle internal combustion engines which are mainly operated with a lean mixture.

    Abstract translation: 本发明涉及一种排气净化系统用于净化燃烧源的废气的步骤包括至少包含在其中的氮氧化物与氨的催化剂(5),用于使用在燃烧源(1)排出的排气的至少一部分的部件,同时氨生成操作阶段的氨和 对于由包含在燃烧源的发射的排气中使用所生成的氨的氮氧化物作为还原剂的还原的下游氮氧化物还原催化剂(4)。 根据本发明的等离子体发生器(6),用于从供给到废气上游的氨生成催化剂组分的等离子技术生产的氨发生反应促进,反应颗粒的氨的催化剂(5)的氨生成操作阶段期间。 这确保即使在较低的废气温度足够氨的生产。 例如使用 从稀薄燃烧主要是汽车内燃机净化废气。

    EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINES
    43.
    发明申请
    EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINES 审中-公开
    用于内燃机的排气排放控制装置

    公开(公告)号:WO1997019261A1

    公开(公告)日:1997-05-29

    申请号:PCT/JP1996003288

    申请日:1996-11-08

    Abstract: A three-way catalyst (8a) is connected to a first group of cylinders (1a) whereby exhaust gas discharged from the first group of cylinders (1a) and passing through the three-way catalyst (8a) and exhaust gas discharged from a second group of cylinders (1b) are conducted to an exhaust gas purifying catalyst (14). The second group of cylinders (1b) are operated with a lean gas. The first group of cylinders (1a) are operated with a rich gas, so that NH3 is generated from NOx in the exhaust gas of the first group of cylinders (1a) by means of the three-way catalyst (8a). The exhaust gas purifying catalyst (14) causes NH3 from the three-way catalyst (8a) to purify NOx in the exhaust gas of the second group of cylinders (1b). An amount of HC flowing into the three-way catalyst (8a) is found, and when the amount of HC exceeds a set amount, the first group of cylinders (1a) is temporarily operated with a lean gas, thereby maintaining a favorable catalytic activity of the three-way catalyst (8a).

    Abstract translation: 三元催化剂(8a)连接到第一组汽缸(1a),从而从第一组汽缸(1a)排出并通过三元催化剂(8a)的废气和从第二组排出的废气 一组气缸(1b)被传导到排气净化催化剂(14)。 第二组气缸(1b)以贫气运行。 第一组气缸(1a)以丰富的气体运行,从而通过三元催化剂(8a)从第一组气缸(1a)的废气中的NOx产生NH 3。 废气净化催化剂(14)使来自三元催化剂(8a)的NH 3净化第二组气缸(1b)的排气中的NOx。 发现流入三元催化剂(8a)的HC的量,当HC的量超过设定量时,第一组气缸(1a)以贫气临时运行,从而保持良好的催化活性 的三元催化剂(8a)。

    USE OF SPECIFIC ENGINE CYLINDERS FOR REDUCTANT GENERATION
    44.
    发明申请
    USE OF SPECIFIC ENGINE CYLINDERS FOR REDUCTANT GENERATION 审中-公开
    使用特定的发动机气缸进行还原

    公开(公告)号:WO2017095684A1

    公开(公告)日:2017-06-08

    申请号:PCT/US2016/063145

    申请日:2016-11-21

    Inventor: BACKHAUS, Jacob

    Abstract: A system comprises an engine including a plurality of cylinders. A first intake throttle is positioned upstream of a first set of cylinders of the plurality of cylinders. The first intake throttle provides air at a first flow rate to the first set of cylinders so as to produce a lean air/fuel mixture in the first set of cylinders. A second intake throttle is positioned upstream of a second set of cylinders included in the plurality of cylinders and in parallel of the first intake throttle. The second intake throttle provides air at a second flow rate to the second set of cylinders so as to produce a rich air/fuel mixture in the second set of cylinders.

    Abstract translation: 系统包括包含多个汽缸的发动机。 第一进气节气门位于多个气缸的第一组气缸的上游。 第一进气节气门以第一流量向第一组气缸提供空气,以便在第一组气缸中产生贫空气/燃料混合物。 第二进气节气门位于包括在多个气缸中并与第一进气节气门并联的第二组气缸的上游。 第二进气节气门以第二流速向第二组气缸提供空气,以便在第二组气缸中产生浓空气/燃料混合物。

    DUAL PATH AFTERTREATMENT SYSTEM AND METHOD UTILIZING FUEL AS AN ON-BOARD REDUCTANT FOR NOx SCR
    46.
    发明申请
    DUAL PATH AFTERTREATMENT SYSTEM AND METHOD UTILIZING FUEL AS AN ON-BOARD REDUCTANT FOR NOx SCR 审中-公开
    双路径后处理系统和使用燃料作为NOx排放减少的板块

    公开(公告)号:WO2016130634A1

    公开(公告)日:2016-08-18

    申请号:PCT/US2016/017278

    申请日:2016-02-10

    Applicant: FCA US LLC

    Abstract: A system and method for utilizing fuel as an on-board reductant for selective catalytic reduction of NOx is provided and includes a controller for controlling an engine to produce a lean first exhaust stream and a rich second exhaust stream that are received in respective first and second passageways of a dual path aftertreatment system. The rich second exhaust stream reacts with NOx stored in a NOx storage and reduction catalyst of the second passageway to regenerate this catalyst and generate ammonia. The first exhaust stream and the second exhaust stream having the generated ammonia are combined in a downstream common passageway to form a combined lean exhaust gas stream where the ammonia carried therein is stored or used by an SCR catalyst of the common passageway for NOx reduction. The engine is subsequently controlled to produce a rich first exhaust stream and a lean second exhaust stream.

    Abstract translation: 提供了一种用于利用燃料作为板上还原剂用于选择性催化还原NOx的系统和方法,并且包括用于控制发动机以产生稀薄的第一排气流和富集的第二排气流的控制器,所述第一排气流和第二排气流在相应的第一和第二 双路后处理系统的通道。 富含的第二废气流与存储在第二通道的NOx储存和还原催化剂中的NOx反应,以再生该催化剂并产生氨。 具有生成的氨的第一排气流和第二排气流在下游公共通道中组合以形成组合的贫排气流,其中运载在其中的氨由用于NOx还原的公共通道的SCR催化剂储存或使用。 发动机随后被控制以产生富有的第一排气流和贫的第二排气流。

    排気浄化システム
    48.
    发明申请
    排気浄化システム 审中-公开
    排气净化系统

    公开(公告)号:WO2015170643A1

    公开(公告)日:2015-11-12

    申请号:PCT/JP2015/062796

    申请日:2015-04-28

    Abstract:  排気浄化システムに関し、NOxセンサのセンサ値が急上昇した場合に、NOxセンサが故障したか否かを効果的に判定する。 尿素水から生成されるアンモニアを還元剤として排気中のNOxを浄化するSCR41と、排気中のNOx値を取得するNOxセンサ22とを備える排気浄化システムであって、NOxセンサ22で取得されるNOx値が所定の第1判定NOx値から該第1判定NOx値よりも高い所定の第2判定NOx値に達するまでの到達時間を計測する実到達時間計測部55と、実到達時間計測部55によって計測された到達時間が所定の第1判定時間以下の場合にNOxセンサ22を故障と判定するセンサ値上昇判定部56とを備えた。

    Abstract translation: 当NOx传感器的传感器值突然增加时,本发明有效地确定排气净化系统的NOx传感器是否变得有缺陷。 排气净化系统设置有SCR(41),用于使用由尿素水作为还原剂产生的氨和用于获取排气中的NOx值的NOx传感器(22)净化排气中的NOx。 排气净化系统还具备:实时到达时间测量部(55),其测量由NOx传感器(22)获取的NOx值从第一判定NOx值到达第二判定NOx值所花费的时间 其高于第一确定性NOx值; 以及当由实际到达时间测量部分(55)测量的到达时间等于或小于预定的第一确定时间时,确定NOx传感器(22)有缺陷的传感器值增加确定部分(56)。

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