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    • 5. 发明申请
    • SYSTEM AND METHODS TO DETECT NON-UREA REDUCTANT FILLED IN A UREA TANK
    • 用于检测在尿素罐中填充的非尿素还原剂的系统和方法
    • US20100083636A1
    • 2010-04-08
    • US12245830
    • 2008-10-06
    • Yue-Yun WangOgnyan N. YanakievMan-Feng Chang
    • Yue-Yun WangOgnyan N. YanakievMan-Feng Chang
    • F01N11/00
    • F01N3/2066F01N9/00F01N11/00F01N2240/20F01N2550/02F01N2550/05F01N2610/00Y02T10/24Y02T10/47
    • A method for indicating a non-urea reductant fault in a powertrain including an internal combustion engine and an aftertreatment system having an aftertreatment device utilizing a catalyst to convert NOx includes monitoring a NOx content exiting the aftertreatment system subsequent to a powertrain start-up event through a test span, monitoring a measure of NOx content entering the aftertreatment system subsequent to a powertrain start-up event through the test span, and determining a measure of NOx conversion accomplished in the aftertreatment device based upon the NOx content exiting the aftertreatment system and the measure of NOx content entering the aftertreatment system. The method includes, through the test span, comparing the measure of NOx conversion determined at a start of the test span to the measure of NOx conversion at a later time within the test span. A non-urea reductant fault is indicated based upon the comparing identifying a reduction in NOx conversion accomplished in the aftertreatment device between the start of the test span and the later time within the test span.
    • 一种用于指示包括内燃机和具有利用催化剂转化NOx的后处理装置的后处理装置的动力系中的非尿素还原剂故障的方法包括在动力系启动事件之后监测离开后处理系统的NOx含量,通过 测试跨度,监测在通过测试跨度的动力系启动事件之后进入后处理系统的NOx含量的量度,以及基于离开后处理系统的NOx含量确定在后处理装置中完成的NOx转化的量度, 测量进入后处理系统的NOx含量。 该方法包括,通过测试跨度,将在测试跨度开始时确定的NOx转化量与在测试范围内的稍后时间内的NOx转化量进行比较。 基于比较确定在测试跨度开始和测试跨度之后的后期处理装置中完成的NOx转化率的降低来指示非尿素还原剂故障。