公开(公告)号：US09109480B2

公开(公告)日：2015-08-18

申请号：US13688347

申请日：2012-11-29

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Janean E Kowalkowski ,  John David Barta ,  Scott McLane ,  Marek L. Wilmanowicz ,  Benjamin Radke ,  Jason J Chung

IPC: F01N3/00 ,  F01N3/02 ,  F01N3/10 ,  F01N3/20 ,  F01N9/00 ,  F01N11/00

CPC classification number: F01N9/002 ,  F01N3/208 ,  F01N11/00 ,  F01N2560/026 ,  F01N2560/14 ,  Y02A50/2325 ,  Y02T10/24 ,  Y02T10/47

Abstract: A system and method for initiating an engine after-run state and controlling a nitrogen oxide sensor self-diagnostic tool are provided. The system may include an internal combustion engine, an exhaust system, a selective catalytic reduction (SCR) device and at least two NOx sensors to measure the efficiency of the SCR device and a controller or host machine. The controller, via the present method, executes a first control action to disable the self-diagnostic tool when one of an occurrence of a particulate filter regeneration event and a non-occurrence of a calibration threshold is detected. The controller executes a second control action, initiating an engine after-run state and enabling the self-diagnostic tool when one of a non-occurrence of a particulate filter regeneration event and an occurrence of the calibration threshold is detected.

Abstract translation: 提供了用于启动发动机运行后状态并控制氮氧化物传感器自诊断工具的系统和方法。 该系统可以包括内燃机，排气系统，选择性催化还原（SCR）装置和至少两个NOx传感器，以测量SCR装置和控制器或主机的效率。 当检测到微粒过滤器再生事件的发生和校准阈值的不发生时，通过本方法，控制器执行第一控制动作以禁用自诊断工具。 控制器执行第二控制动作，启动发动机运行后状态，并且当检测到不发生微粒过滤器再生事件和出现校准阈值时，启动自诊断工具。