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    • 83. 发明申请
    • ENGINE AND EXHAUST AFTERTREATMENT CONTROL
    • 发动机和排气后处理控制
    • WO2011082401A3
    • 2011-11-24
    • PCT/US2011020051
    • 2011-01-03
    • CUMMINS IP INCPONNATHPUR CHETAN
    • PONNATHPUR CHETAN
    • F01N3/20B01D53/94F01N3/18F01N9/00
    • F01N3/2066F01N9/00F01N11/00F01N2570/14Y02A50/2344Y02C20/10Y02T10/24Y02T10/47
    • A method of controlling an internal combustion engine and exhaust system having an SCR, and engine and exhaust system including an SCR, described herein, monitors, in real time, NOx conversion efficiency of an exhaust flow output by the internal combustion engine through the SCR. A determination is made as to whether the monitored NOx conversion efficiency exceeds a predetermined target conversion efficiency, such as a target based on a predetermined allowable amount of NOx emission. While the monitored NOx conversion efficiency exceeds the predetermined amount, the NOx concentration level in the exhaust flow is increased by an amount based on the difference in the monitored conversion efficiency and the predetermined target conversion efficiency. Another method and engine and exhaust system provided herein tracks an amount of ammonia stored on a catalyst of the SCR based on a feed-forward calculation of injected urea based on engine out NOx mass flow and reduction efficiency of the SCR catalyst based on a temperature of the SCR catalyst, and operates the engine and exhaust system in a NOx-rich mode in which an EGR fraction command is adjusted, based on the tracked amount of stored ammonia, to decrease an amount of EGR gas entering an intake of the internal combustion engine and thereby reduce ammonia stored on the SCR catalyst.
    • 本文所述的控制具有SCR的内燃机和排气系统的方法以及包括SCR的发动机和排气系统实时监控内燃机通过SCR输出的排气流的NOx转化效率。 基于预定的允许的NOx排放量来确定监测的NOx转化效率是否超过预定的目标转化效率,例如目标。 当所监测的NOx转化效率超过预定量时,基于监测的转化效率和预定的目标转化效率的差异,将排气流中的NOx浓度水平增加一定量。 本文提供的另一种方法和发动机和排气系统基于基于发动机排出的NOx质量流量和SCR催化剂的还原效率基于喷射的尿素的前馈计算来追踪存储在SCR的催化剂上的氨的量, SCR催化剂,并且基于跟踪的储存氨量来调整发动机和排气系统处于其中EGR分数指令被调整的富含NOx的模式中,以减少进入内燃机的进气的EGR气体的量 并由此减少存储在SCR催化剂上的氨。
    • 84. 发明申请
    • APPARATUS, SYSTEM, AND METHOD FOR CATALYST PRESENCE DETECTION
    • 用于催化剂存在检测的装置,系统和方法
    • WO2011072250A3
    • 2011-09-29
    • PCT/US2010059938
    • 2010-12-10
    • CUMMINS IP INCLANA CARLOSQI BAOHUA
    • LANA CARLOSQI BAOHUA
    • F01N3/20B01D53/94F01N3/08F01N9/00
    • G01N27/16B01D53/94F01N3/0814F01N3/20F01N11/002F01N2550/24F01N2900/1404F02B77/086G01M15/102G01N25/00Y02T10/47
    • A system to detect the presence of a catalyst includes a catalyst housing (102), a first temperature sensing device (204), a second temperature sensing device (206), a flow rate measurement device (208), and a processing device (210). The first temperature sensing device measures a first temperature of exhaust gas upstream of the catalyst housing. The second temperature sensing device measures a second temperature of the exhaust gas downstream of the catalyst housing. The processing device estimates an expected time delay between the measured inlet and outlet exhaust gas temperatures corresponding to a system with a catalyst present. The processing device may also determine the presence of a catalyst by comparing the measured second temperature to the measured first temperature and comparing the measured second temperature to an estimated delayed first temperature associated with the expected time delay.
    • 用于检测催化剂存在的系统包括催化剂壳体(102),第一温度感测装置(204),第二温度感测装置(206),流量测量装置(208)和处理装置(210 )。 第一温度感测装置测量催化剂壳体上游的废气的第一温度。 第二温度感测装置测量催化剂壳体下游的废气的第二温度。 处理装置估计对应于具有催化剂的系统的测量的入口和出口排气温度之间的预期时间延迟。 处理装置还可以通过将测量的第二温度与测量的第一温度进行比较来确定催化剂的存在,并将测量的第二温度与与预期时间延迟相关联的估计延迟的第一温度进行比较。
    • 87. 发明申请
    • APPARATUS, SYSTEM, AND METHOD FOR CATALYST PRESENCE DETECTION
    • 用于催化剂存在检测的装置,系统和方法
    • WO2011072250A2
    • 2011-06-16
    • PCT/US2010/059938
    • 2010-12-10
    • CUMMINS IP, INCLANA, CarlosQI, Baohua
    • LANA, CarlosQI, Baohua
    • F01N3/20B01D53/94F01N3/08F01N9/00
    • G01N27/16B01D53/94F01N3/0814F01N3/20F01N11/002F01N2550/24F01N2900/1404F02B77/086G01M15/102G01N25/00Y02T10/47
    • A system to detect the presence of a catalyst includes a catalyst housing (102), a first temperature sensing device (204), a second temperature sensing device (206), a flow rate measurement device (208), and a processing device (210). The first temperature sensing device measures a first temperature of exhaust gas upstream of the catalyst housing. The second temperature sensing device measures a second temperature of the exhaust gas downstream of the catalyst housing. The processing device estimates an expected time delay between the measured inlet and outlet exhaust gas temperatures corresponding to a system with a catalyst present. The processing device may also determine the presence of a catalyst by comparing the measured second temperature to the measured first temperature and comparing the measured second temperature to an estimated delayed first temperature associated with the expected time delay.
    • 检测催化剂存在的系统包括催化剂外壳(102),第一温度感测装置(204),第二温度感测装置(206),流速测量装置(208) )和处理设备(210)。 第一温度感测装置测量催化剂壳体上游的排气的第一温度。 第二温度感测装置测量催化剂壳体下游的排气的第二温度。 处理装置估计对应于存在催化剂的系统的测量的入口和出口排气温度之间的预期时间延迟。 处理装置还可以通过将测量的第二温度与测量的第一温度进行比较并且将测量的第二温度与与预期的时间延迟相关联的估计的延迟的第一温度进行比较来确定催化剂的存在。
    • 88. 发明申请
    • EXHAUST FLOW SEGREGATOR AND ASSOCIATED SYSTEMS AND METHODS
    • 排气流量分离器及相关系统及方法
    • WO2011031555A2
    • 2011-03-17
    • PCT/US2010/047000
    • 2010-08-27
    • CUMMINS IP, INC.HENRY, CaryYEZERETS, Aleksey
    • HENRY, CaryYEZERETS, Aleksey
    • F01N3/20F01N3/24F01N1/16
    • F01N3/2066F01N2610/02F01N2610/102F01N2610/1453Y02T10/24
    • According to one embodiment, an exhaust gas after-treatment apparatus includes an exhaust tube (104) defining an exhaust flow channel through which a main exhaust gas stream is flowable. The apparatus also includes an exhaust flow segregator (117) positioned within the exhaust tube. The exhaust flow segregator separates the exhaust flow channel into a first channel (109) through which a first portion (240) of the main exhaust gas stream is flowable and a second channel (111) through which a second portion (250) of the main exhaust gas stream is flowable. Additionally, the apparatus includes an injector (108) coupled to the exhaust tube. The injector can inject reductant into the first portion of the main exhaust gas stream flowing through the first channel. At least one exhaust gas heater (110) is communicable in heat supplying communication with the first portion of the main exhaust gas stream flowing through the first channel.
    • 根据一个实施例,废气后处理装置包括限定主排气流可流动的排气流动通道的排气管(104)。 该设备还包括位于排气管内的排气流分离器(117)。 排气流分离器将废气流通道分离成主排气流的第一部分(240)可流过的第一通道(109)和主主排气流的第二部分(250)的第二通道(111),第二通道 废气流是可流动的。 另外,该装置包括联接到排气管的喷射器(108)。 喷射器可将还原剂注入流经第一通道的主排气流的第一部分。 至少一个排气加热器(110)可连通地与能够流过第一通道的主排气流的第一部分进行供热连通。