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CN102678237A 用于控制氮氧化物（NOX）转化效率监控器的方法和系统 无效 - 驳回

用于控制氮氧化物（NOX）转化效率监控器的方法和系统
摘要：
一种车辆，包括发动机，排气系统、选择性催化还原(SCR)装置、配置为分别测量上游和下游NOx水平的第一和第二传感器、和控制器或主机。控制器，经由本发明的方法，使用来自传感器的NOx水平来计算SCR装置的NOx转化有效率。在关键循环结束时，当上游NOx的累积量小于校准上游NOx水平时，控制器确定NOx转化有效率是否目前合格或目前不合格。仅当NOx转化有效率在关键循环结束处目前合格时，累积的上游NOx被记录在存储器中，用于在接下来的关键循环中计算NOx转化有效率中使用。一种车辆的控制系统，使用如上所述的控制器和传感器。
摘要（英）：

A vehicle includes an engine, an exhaust system, a selective catalytic reduction (SCR) device, a first sensor and a second NOx sensor configured to respectively measure an upstream and a downstream NOx level, and a controller or host machine. The controller, via the present method, calculates a NOx conversion efficiency rate of the SCR device using the NOx levels from the sensors. At the end of a key cycle when an accumulated amount of upstream NOx is less than a calibrated upstream NOx level, the controller determines if the NOx conversion efficiency rate is presently passing or failing. The accumulated upstream NOx is recorded in memory for use in calculating the NOx conversion efficiency rate during a subsequent key cycle only when the NOx conversion efficiency rate is presently passing at the end of the key cycle. A control system for the vehicle uses the controller and sensors as noted above.

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