首页>
外国专利>
Determination of the Linear Correlation Between Signals, Which are Determined by Means of NOx Sensors, in an SCR Exhaust Gas Aftertreatment System
Determination of the Linear Correlation Between Signals, Which are Determined by Means of NOx Sensors, in an SCR Exhaust Gas Aftertreatment System
展开▼
机译:SCR废气后处理系统中信号之间的线性相关性的确定,该线性相关性由NOx传感器确定
展开▼
页面导航
摘要
著录项
相似文献
摘要
A measurement method is provided for an SCR exhaust gas aftertreatment system of a vehicle, where the SCR exhaust gas aftertreatment system includes a first NOx sensor, which is arranged in the exhaust gas flow upstream of the SCR catalytic converter and the urea introducing device; and a second NOx sensor, which is arranged in the SCR catalytic converter or in the exhaust gas flow downstream of the SCR catalytic converter. According to the method, a first signal is determined by the first NOx sensor. This first signal can also be a time delayed signal. In addition, a second signal is determined by a second NOx sensor. Based on the first and the second signal, a linearity indication, such as correlation coefficient, is determined that is a measure for the linear correlation between both signals. The linearity indication can be used to differentiate between an NOx slip and an NH3 slip.
展开▼
机译:提供了一种用于车辆的SCR废气后处理系统的测量方法,其中该SCR废气后处理系统包括第一NO x Sub>传感器,其布置在SCR催化器上游的废气流中。转化器和尿素引入装置;第二个NO x Sub>传感器布置在SCR催化转化器中或SCR催化转化器下游的废气流中。根据该方法,由第一NO x Sub>传感器确定第一信号。该第一信号也可以是时间延迟的信号。此外,第二个信号由第二个NO x Sub>传感器确定。基于第一和第二信号,确定诸如相关系数的线性指示,该线性指示是用于两个信号之间的线性相关的量度。线性度指示可用于区分NO x Sub>滑动和NH3滑动。
展开▼