公开(公告)号：US20140352278A1

公开(公告)日：2014-12-04

申请号：US13905473

申请日：2013-05-30

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Janean E. Kowalkowski ,  Timothy J. Holbert

IPC: F01N11/00

CPC classification number: F01N11/002 ,  F01N3/2066 ,  F01N9/002 ,  F01N11/00 ,  F01N2550/02 ,  F01N2900/08 ,  F01N2900/1606 ,  Y02A50/2325 ,  Y02T10/24 ,  Y02T10/47

Abstract: A vehicle that includes an engine, an exhaust system, and a controller, and a method are disclosed herein. The exhaust system includes a passage for directing the exhaust gas stream from the engine through the series of exhaust after-treatment devices, including a selective-catalytic reduction device and a diesel particulate filter (DPF). The exhaust after-treatment devices are employed to reduce various exhaust emissions of the engine. The exhaust system, may however, prematurely return failing emissions results due to the amount of contaminants that have flowed through the exhaust system since the last regeneration even of the particulate filter. Therefore, the controller may, via the present method, alter the threshold of the SCR efficiency diagnostic due to contaminants accumulated on the DPF and selectively enable or disable the diagnostic based on a set of recorded instructions, to improve the robustness of the SCR efficiency diagnostic and prevent inaccurate failing emissions results.

Abstract translation: 本文公开了包括发动机，排气系统和控制器的车辆以及方法。 排气系统包括用于引导来自发动机的废气流通过包括选择性催化还原装置和柴油微粒过滤器（DPF）的一系列排气后处理装置的通道。 排气后处理装置用于减少发动机的各种废气排放。 然而，排气系统可能由于微粒过滤器的最后一次再生而由于排出系统中流过的污染物的量而过早地返回故障排放结果。 因此，控制器可以通过本方法改变由于在DPF上积聚的污染物而导致的SCR效率诊断的阈值，并且基于一组记录的指令选择性地启用或禁用诊断，以提高SCR效率诊断的鲁棒性 并防止不正确的失效排放结果。

公开(公告)号：US09415345B2

公开(公告)日：2016-08-16

申请号：US13760558

申请日：2013-02-06

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Timothy J. Holbert ,  Eric M. Sisco ,  Janean E. Kowalkowski

IPC: F01N3/00 ,  B01D53/94 ,  F01N3/20 ,  F01N3/10 ,  F01N11/00

CPC classification number: B01D53/9495 ,  B01D53/9409 ,  B01D53/9459 ,  B01D2251/2062 ,  B01D2251/208 ,  F01N3/106 ,  F01N3/208 ,  F01N11/00 ,  F01N2550/02 ,  F01N2560/026 ,  F01N2610/02 ,  F01N2610/03 ,  Y02A50/2325 ,  Y02T10/24 ,  Y02T10/47

Abstract: A control method and system for monitoring a selective catalytic reduction (“SCR”) device of an exhaust gas treatment system is disclosed. The method includes monitoring a plurality of operating conditions related to determining an efficiency of the SCR device and a SCR temperature. The method includes determining if each of the operating conditions are within a respective predetermined range and if the SCR temperature is below an operating temperature range. The method includes activating a hydrocarbon supply based on if each of the operating conditions are within the respective predetermined range and if the SCR temperature is below the operating temperature range. The hydrocarbon supply is located upstream of the SCR device to generate heat if activated. The method includes monitoring the SCR temperature to determine if the SCR device is operating within the operating temperature range.

Abstract translation: 公开了一种用于监测废气处理系统的选择性催化还原（SCR））装置的控制方法和系统。 该方法包括监视与确定SCR装置的效率和SCR温度相关的多个操作条件。 该方法包括确定每个操作条件是否在相应的预定范围内，以及如果SCR温度低于工作温度范围。 该方法包括基于每个操作条件是否在相应的预定范围内以及如果SCR温度低于工作温度范围激活烃供应。 碳氢化合物供应位于SCR装置的上游，以产生热量，如果被激活。 该方法包括监视SCR温度以确定SCR装置是否在工作温度范围内运行。

公开(公告)号：US20140219896A1

公开(公告)日：2014-08-07

申请号：US13760558

申请日：2013-02-06

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Timothy J. Holbert ,  Eric M. Sisco ,  Janean E. Kowalkowski

IPC: B01D53/94

CPC classification number: B01D53/9495 ,  B01D53/9409 ,  B01D53/9459 ,  B01D2251/2062 ,  B01D2251/208 ,  F01N3/106 ,  F01N3/208 ,  F01N11/00 ,  F01N2550/02 ,  F01N2560/026 ,  F01N2610/02 ,  F01N2610/03 ,  Y02A50/2325 ,  Y02T10/24 ,  Y02T10/47

Abstract: A control method and system for monitoring a selective catalytic reduction (“SCR”) device of an exhaust gas treatment system is disclosed. The method includes monitoring a plurality of operating conditions related to determining an efficiency of the SCR device and a SCR temperature. The method includes determining if each of the operating conditions are within a respective predetermined range and if the SCR temperature is below an operating temperature range. The method includes activating a hydrocarbon supply based on if each of the operating conditions are within the respective predetermined range and if the SCR temperature is below the operating temperature range. The hydrocarbon supply is located upstream of the SCR device to generate heat if activated. The method includes monitoring the SCR temperature to determine if the SCR device is operating within the operating temperature range.

Abstract translation: 公开了一种用于监测废气处理系统的选择性催化还原（SCR））装置的控制方法和系统。 该方法包括监视与确定SCR装置的效率和SCR温度相关的多个操作条件。 该方法包括确定每个操作条件是否在相应的预定范围内，以及如果SCR温度低于工作温度范围。 该方法包括基于每个操作条件是否在相应的预定范围内以及如果SCR温度低于工作温度范围激活烃供应。 碳氢化合物供应位于SCR装置的上游，以产生热量，如果被激活。 该方法包括监视SCR温度以确定SCR装置是否在工作温度范围内运行。

公开(公告)号：US09376952B2

公开(公告)日：2016-06-28

申请号：US13905473

申请日：2013-05-30

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Janean E. Kowalkowski ,  Timothy J. Holbert

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

CPC classification number: F01N11/002 ,  F01N3/2066 ,  F01N9/002 ,  F01N11/00 ,  F01N2550/02 ,  F01N2900/08 ,  F01N2900/1606 ,  Y02A50/2325 ,  Y02T10/24 ,  Y02T10/47

Abstract: A vehicle that includes an engine, an exhaust system, and a controller, and a method are disclosed herein. The exhaust system includes a passage for directing the exhaust gas stream from the engine through the series of exhaust after-treatment devices, including a selective-catalytic reduction device and a diesel particulate filter (DPF). The exhaust after-treatment devices are employed to reduce various exhaust emissions of the engine. The exhaust system, may however, prematurely return failing emissions results due to the amount of contaminants that have flowed through the exhaust system since the last regeneration even of the particulate filter. Therefore, the controller may, via the present method, alter the threshold of the SCR efficiency diagnostic due to contaminants accumulated on the DPF and selectively enable or disable the diagnostic based on a set of recorded instructions, to improve the robustness of the SCR efficiency diagnostic and prevent inaccurate failing emissions results.

Abstract translation: 本文公开了包括发动机，排气系统和控制器的车辆以及方法。 排气系统包括用于引导来自发动机的废气流通过包括选择性催化还原装置和柴油微粒过滤器（DPF）的一系列排气后处理装置的通道。 排气后处理装置用于减少发动机的各种废气排放。 然而，排气系统可能由于微粒过滤器的最后一次再生而由于排出系统中流过的污染物的量而过早地返回故障排放结果。 因此，控制器可以通过本方法改变由于在DPF上积聚的污染物而导致的SCR效率诊断的阈值，并且基于一组记录的指令选择性地启用或禁用诊断，以提高SCR效率诊断的鲁棒性 并防止不正确的失效排放结果。