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公开(公告)号：US08769928B2
公开(公告)日：2014-07-08
申请号：US12891264
申请日：2010-09-27
IPC分类号： F01N3/20
CPC分类号： F01N3/208 , F01N3/106 , F01N13/009 , F01N2560/02 , F01N2560/021 , F01N2560/06 , F01N2560/07 , F01N2610/02 , F02D41/1463 , F02D2041/1468 , F02D2250/14 , Y02T10/24
摘要： An exhaust system for use with a combustion engine is disclosed. The exhaust system may have an exhaust passage, a reduction catalyst disposed within the exhaust passage, and an injection device configured to inject reductant into the exhaust passage. The exhaust system may also have a sensor configured to generate a signal indicative of a concentration of an exhaust constituent and the reductant, and a controller in communication with the sensor and the injection device. The controller may be configured to make a comparison of a value indicative of a rate of change of the signal for a period of time with a threshold amount, and make a determination of whether the sensor is sensing a concentration of the exhaust constituent or the reductant based on the comparison. The controller may also be configured to adjust operation of the injection device based on the determination.
摘要翻译： 公开了一种用于内燃机的排气系统。 排气系统可以具有排气通道，设置在排气通道内的还原催化剂，以及配置成将还原剂注入排气通道的注入装置。 排气系统还可以具有被配置为产生指示排气组分和还原剂的浓度的信号的传感器，以及与传感器和注射装置连通的控制器。 控制器可以被配置为将指示一段时间内的信号的变化率的值与阈值进行比较，并且确定传感器是否感测排气成分或还原剂的浓度 基于比较。 控制器还可以被配置为基于该确定来调整注射装置的操作。
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公开(公告)号：US20120073265A1
公开(公告)日：2012-03-29
申请号：US12891264
申请日：2010-09-27
CPC分类号： F01N3/208 , F01N3/106 , F01N13/009 , F01N2560/02 , F01N2560/021 , F01N2560/06 , F01N2560/07 , F01N2610/02 , F02D41/1463 , F02D2041/1468 , F02D2250/14 , Y02T10/24
摘要： An exhaust system for use with a combustion engine is disclosed. The exhaust system may have an exhaust passage, a reduction catalyst disposed within the exhaust passage, and an injection device configured to inject reductant into the exhaust passage. The exhaust system may also have a sensor configured to generate a signal indicative of a concentration of an exhaust constituent and the reductant, and a controller in communication with the sensor and the injection device. The controller may be configured to make a comparison of a value indicative of a rate of change of the signal for a period of time with a threshold amount, and make a determination of whether the sensor is sensing a concentration of the exhaust constituent or the reductant based on the comparison. The controller may also be configured to adjust operation of the injection device based on the determination.
摘要翻译： 公开了一种用于内燃机的排气系统。 排气系统可以具有排气通道，设置在排气通道内的还原催化剂，以及配置成将还原剂注入排气通道的注入装置。 排气系统还可以具有被配置为产生指示排气组分和还原剂的浓度的信号的传感器，以及与传感器和注射装置连通的控制器。 控制器可以被配置为将指示一段时间内的信号的变化率的值与阈值进行比较，并且确定传感器是否感测排气成分或还原剂的浓度 基于比较。 控制器还可以被配置为基于该确定来调整注射装置的操作。
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