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公开(公告)号：US20090107116A1
公开(公告)日：2009-04-30
申请号：US11815421
申请日：2006-02-16
IPC分类号： F01N9/00
CPC分类号： F01N3/208 , B01D53/90 , B01D53/9431 , B01D53/9495 , C01C1/086 , F01N2240/40 , F01N2560/021 , F01N2560/026 , F01N2610/02 , F01N2610/06 , F01N2610/10 , F01N2610/146 , F01N2900/08 , F01N2900/14 , F01N2900/1808 , F01N2900/1811 , F01N2900/1814 , F01N2900/1818 , Y02A50/2325 , Y02T10/24
摘要： A device (1) is disclosed for generating gaseous ammonia formed by the hydrolysis of an aqueous solution of urea at elevated temperature and pressure and for feeding the gaseous ammonia into the exhaust gas of an IC engine as it flows through the exhaust system of the engine. The device (1) is placed in the exhaust system and has an inlet (2) for the exhaust gas and an outlet (3) for the exhaust gas so that the exhaust gas will flow through the device (1) during use. The aqueous solution of urea is contained in a reaction vessel located between the inlet (2) and the outlet (3) such that, in use, the vessel and therefore the urea solution are heated by heat exchange with the exhaust gas as it flows from the inlet (2) to the outlet (3). A pump (32) is provided for pumping urea solution into the reaction vessel and a controller (33) controls the pump (32) in response to changing NOx output from the IC engine such that, in response to an increase in NOx output, the controller (33) controls the pump (32) to increase the level of urea solution in the reaction vessel, thereby increasing the surface area of urea solution available for heat exchange with the exhaust gas so as to increase the rate of production of gaseous ammonia in the reactor vessel.
摘要翻译： 公开了一种用于产生通过在升高的温度和压力下水解尿素水溶液而形成的气态氨的装置（1），并且当气体氨流经发动机的排气系统时，将气态氨供给到IC发动机的废气中 。 设备（1）被放置在排气系统中并且具有用于废气的入口（2）和用于废气的出口（3），使得排气在使用期间将流过设备（1）。 尿素水溶液包含在位于入口（2）和出口（3）之间的反应容器中，使得在使用时，容器和尿素溶液在与废气流动时通过与废气的热交换而被加热 入口（2）到出口（3）。 提供泵（32）以将尿素溶液泵送到反应容器中，并且控制器（33）响应于来自IC发动机的NO x输出的变化来控制泵（32），使得响应于NOx输出的增加， 控制器（33）控制泵（32）以增加反应容器中的尿素溶液的水平，从而增加可用于与废气进行热交换的尿素溶液的表面积，从而提高气态氨的生成速率 反应堆容器。
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公开(公告)号：US20070204600A1
公开(公告)日：2007-09-06
申请号：US11681105
申请日：2007-03-01
IPC分类号： F01N3/00
CPC分类号： B01D53/9431 , B01D53/9495 , F01N3/206 , F01N3/208 , F01N13/009 , F01N2240/16 , F01N2510/063 , F01N2550/03 , F01N2560/021 , F01N2560/14 , F01N2570/18 , F01N2610/02 , F01N2900/0418 , F01N2900/1622 , Y02T10/24
摘要： A system, comprising of a catalyst supported on a substrate positioned in an engine exhaust, a heater embedded in a sub-region of the substrate to heat a local region of the catalyst, and an electrode coupled in the local sub-region of the substrate of the catalyst. The catalyst reduces NOx emissions by reacting it with a reductant such as ammonia. The amount of ammonia stored on the catalyst may be determined and controlled through conductivity measurements in the locally heated portion of the system described.
摘要翻译： 一种系统，包括负载在位于发动机排气中的基板上的催化剂，嵌入在基板的子区域中以加热催化剂的局部区域的加热器，以及耦合在基板的局部子区域中的电极 的催化剂。 该催化剂通过与还原剂如氨反应来减少NOx排放。 可以通过所述系统的局部加热部分中的电导率测量来确定和控制存储在催化剂上的氨的量。
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公开(公告)号：US07178331B2
公开(公告)日：2007-02-20
申请号：US10526511
申请日：2003-09-03
IPC分类号： F01N3/10
CPC分类号： F01N3/208 , B01D53/9431 , B01D53/9481 , B01D53/949 , B01D53/9495 , B01D2251/2062 , B01D2255/911 , F01N3/0231 , F01N3/035 , F01N3/0814 , F01N3/0871 , F01N13/009 , F01N13/0097 , F01N2510/06 , F01N2560/021 , F01N2560/026 , F01N2560/06 , F01N2610/146 , F01N2900/08 , F02D41/0275 , Y02T10/24
摘要： An exhaust system (10) for a lean-burn internal combustion engine comprises a nitrogen oxide (NOx) absorbent (28), a catalyst (30) for catalyzing the selective catalytic reduction (SCR) of a NOx with a NOx specific reactant, first means (18, 22) for introducing a NOx specific reactant or a precursor thereof into an exhaust gas upstream of the SCR catalyst (30) and means (24) for controlling the introduction of the NOx-specific reactant or precursor thereof into the exhaust gas via the first introducing means (18, 22), wherein the SCR catalyst (30) is disposed upstream of the NOx absorbent (28) and optionally with the NOx absorbent, wherein the control means (24) is arranged to introduce the NOx-specific reactant or the precursor thereof to exhaust gas via the first introducing means (18, 22) only when the SCR catalyst (30) is active, whereby exhaustion of NOx-specific reactant to atmosphere is substantially prevented.
摘要翻译： 用于稀燃内燃机的排气系统（10）包括氮氧化物（NO x）吸收剂（28），用于催化选择性催化还原（SCR）的催化剂（30） NO x x特异性反应物的第一装置（18,22），用于将NO x x特异性反应物或其前体引入到 SCR催化剂（30）上游的废气和用于控制通过第一引入装置（18,22）将NO x - x特异性反应物或其前体引入废气的装置（24） ，其中所述SCR催化剂（30）设置在所述吸收剂（28）的上游，并且任选地设置有所述吸收剂，其中所述控制装置（24）被布置 仅当SCR催化剂（30）是活性的时，通过第一引入装置（18,22）将NO x - x特异性反应物或其前体引入排气， x -speci 基本上防止了与气氛的反应物。
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公开(公告)号：US20060257303A1
公开(公告)日：2006-11-16
申请号：US11125470
申请日：2005-05-10
申请人： Clive Telford
发明人： Clive Telford
CPC分类号： B01D53/9409 , B01D2251/2067 , F01N3/2066 , F01N13/017 , F01N2240/20 , F01N2240/25 , F01N2240/40 , F01N2410/00 , F01N2560/021 , F01N2560/026 , F01N2560/07 , F01N2610/02 , Y02T10/24
摘要： An apparatus comprises parallel first and second exhaust gas passageways, a urea injection system, a hydrolysis catalyst, and an SCR catalyst. The urea injection system is configured to inject urea into the first exhaust gas passageway. The hydrolysis catalyst is positioned in the first exhaust gas passageway to generate ammonia at least partially from urea injected into the first exhaust gas passageway by the urea injection system. The SCR catalyst is positioned downstream to reduce NOx with the generated ammonia. An associated method is disclosed.
摘要翻译： 一种装置包括平行的第一和第二废气通道，尿素喷射系统，水解催化剂和SCR催化剂。 尿素喷射系统构造成将尿素喷射到第一废气通道中。 水解催化剂位于第一废气通道中，以通过尿素喷射系统至少部分地从尿素喷射到第一废气通道中产生氨。 SCR催化剂位于下游，以产生氨来还原NOx。 公开了一种相关联的方法。
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公开(公告)号：US06761025B1
公开(公告)日：2004-07-13
申请号：US10325319
申请日：2002-12-19
申请人： John R. Gladden
发明人： John R. Gladden
IPC分类号： F01N300
CPC分类号： F01N3/208 , F01N3/206 , F01N13/008 , F01N13/0093 , F01N13/0097 , F01N2560/021 , F01N2560/026 , F01N2570/14 , F01N2610/02 , F01N2610/08 , F01N2610/146 , F01N2900/08 , Y02T10/24
摘要： A selective catalytic reduction emissions control system of a compression ignition engine is provided with enhanced ammonia feed control for improved emissions control performance. The reduction agent is provided in two doses, and the reactor is provided with two reacting beds. The second dose of reactant is provided between the first and second reacting beds.
摘要翻译： 压缩点火发动机的选择性催化还原排放控制系统具有增强的氨进料控制，以改善排放控制性能。 还原剂以两个剂量提供，反应器设有两个反应床。 在第一和第二反应床之间提供第二剂量的反应物。
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公开(公告)号：US06532736B2
公开(公告)日：2003-03-18
申请号：US09867020
申请日：2001-05-29
IPC分类号： F01N300
CPC分类号： F01N3/208 , B01D53/9431 , B01D53/9495 , F01N3/206 , F01N2560/021 , F01N2560/06 , F01N2610/02 , F01N2610/146 , F01N2900/08 , Y02T10/24
摘要： A reductant injection control strategy for controlling an amount of nitrogen oxide reducing agent injected upstream of a selective reduction catalyst uses an ammonia sensor located downstream of the catalyst. An open loop injection quantity is first determined based on operation conditions. Ammonia concentration detected downstream of the catalyst is controlled to a desired value, with the desired value based on catalyst temperature and the open loop injection quantity.
摘要翻译： 用于控制在选择还原催化剂上游注入的氮氧化物还原剂的量的还原剂注入控制策略使用位于催化剂下游的氨传感器。 首先根据操作条件确定开环喷射量。 将催化剂下游检测到的氨浓度控制在所需值，所需值基于催化剂温度和开环注入量。
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公开(公告)号：US06295809B1
公开(公告)日：2001-10-02
申请号：US09353294
申请日：1999-07-12
IPC分类号： F01N300
CPC分类号： F01N3/208 , B01D53/9431 , B01D53/9495 , F01N3/206 , F01N2560/021 , F01N2560/06 , F01N2610/02 , F01N2610/146 , F01N2900/08 , Y02T10/24
摘要： A reductant injection control strategy for controlling an amount of nitrogen oxide reducing agent injected upstream of a selective reduction catalyst uses an ammonia sensor located downstream of the catalyst. An open loop injection quantity is first determined based on operation conditions. Ammonia concentration detected downstream of the catalyst is controlled to a desired value, with the desired value based on catalyst temperature and the open loop injection quantity.
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58.发明授权Method for reducing the nitrogen oxide concentration in the exhaust of an internal combustion engine or of a firing system 失效一种用于降低内燃机或燃烧系统的排气中的氮氧化物浓度的方法
公开(公告)号：US5540047A
公开(公告)日：1996-07-30
申请号：US319290
申请日：1994-10-06
CPC分类号： F01N3/208 , B01D53/30 , B01D53/8625 , B01D53/8696 , B01D53/9495 , F01N3/206 , G01N27/4074 , F01N2560/021 , F01N2560/026 , F01N2610/02 , F01N2610/06 , F01N2610/146 , F02B3/06 , Y02T10/24
摘要： The method reduces the nitrogen oxide concentration in the exhaust of an internal combustion engine. A noticeable reduction in the NO.sub.x emission of a diesel motor can be achieved by applying the Selective Catalytic Reduction (SCR) method. In this method, ammonia is injected into a catalyzer through which the exhaust gas flows, this ammonia reacting with nitrogen monoxide or, respectively, nitrogen dioxide to form nitrogen and water. Since the exhaust gas should contain neither nitrogen monoxide nor excess ammonia, suitable methods are required for regulating the metering of NH.sub.3. For controlling the amount of urea added to the exhaust gas as a reduction agent, the NO and NH.sub.3 concentration is measured using a detector located in the exhaust systems following the SCR catalyzer. The detector contains a vanadate layer manufactured on the basis of a specific sputtering method as a sensitive element. The electrical resistance thereof is highest when the conversion of nitrogen monoxide to form nitrogen and water occurs stoichiometrically.
摘要翻译： 该方法降低内燃机排气中的氮氧化物浓度。 通过应用选择性催化还原（SCR）方法可以显着降低柴油发动机的NOx排放。 在这种方法中，将氨注入到催化剂中，排气流过该催化剂，该氨与一氧化氮或分别与二氧化氮反应形成氮和水。 由于废气中既不含有一氧化氮也不含有过量的氨，因此需要适当的方法来调节NH3的计量。 为了控制作为还原剂添加到废气中的尿素的量，使用位于SCR催化剂之后的排气系统中的检测器测量NO和NH 3浓度。 检测器包含基于特定溅射法作为敏感元件制造的钒酸盐层。 当一氧化氮转化成氮和水以化学计量的方式发生时，其电阻最高。
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公开(公告)号：US11971325B2
公开(公告)日：2024-04-30
申请号：US17821029
申请日：2022-08-19
发明人： Marc Cretin
CPC分类号： G01M15/102 , F01N11/00 , F01N11/002 , F01N2550/24 , F01N2560/021 , F01N2560/026
摘要： The present disclosure shows a system for checking a correct mounting of a plurality of sensors, in particular of sensors mounted in an engine system, comprising a controller configured for receiving signals from the plurality of sensors. The controller is configured to monitor a sequence and/or timing of the signals received from the sensors and to evaluate it with respect to a sequence and/or timing of a switching of a power supply to the sensors for checking the correct mounting of the sensors.
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60.发明公开公开(公告)号：US20230372864A1
公开(公告)日：2023-11-23
申请号：US18031354
申请日：2020-12-17
发明人： Byung Tak NAM
CPC分类号： B01D53/1475 , B01D53/1425 , F01N3/0857 , F01N2590/02 , F01N2560/021
摘要： The present invention relates to an apparatus for reducing greenhouse gas emission in a vessel and a vessel including the same, in which CO2 absorbed by taking only a part of the absorbent liquid used when collecting CO2 is removed, so that the device sizes of an absorbent liquid recycling unit and an absorbent liquid circulating unit is kept small and continuous operation is enabled. Or in which exhaust gas is cooled by a heat exchange method, thereby preventing the decrease in a concentration of an absorbent liquid, and CO2 absorbed by taking only a part of the absorbent liquid used when collecting CO2 is removed and an unreacted absorbent liquid is continuously circulated, thereby enabling continuous operation.
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