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1.发明授权System and method for enhancing the performance of a selective catalytic reduction device 有权用于提高选择性催化还原装置的性能的系统和方法公开(公告)号：US09140170B2
公开(公告)日：2015-09-22
申请号：US14010604
申请日：2013-08-27
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Rahul Mital , Jianwen Li , Justin Adam Shetney , Chang H. Kim , Matthew J. Myers
CPC classification number: F01N11/002 , F01N3/021 , F01N3/208 , F01N9/00 , F01N9/002 , F01N2610/02 , F01N2610/1493 , F01N2900/102 , F01N2900/1411 , F01N2900/1602 , F01N2900/1606 , F01N2900/1812 , Y02A50/2325 , Y02T10/24 , Y02T10/47
Abstract: A system and method is provided for enhancing the performance of an SCR device, particularly by routinely reducing the amount of reductant deposits accumulated in an exhaust gas system, when the reductant is injected at a reduced temperature. The system may include an engine, an exhaust gas system, an SCR device, an injection device, and a controller configured to execute the present method. The controller may be configured to select an initial injection rate and an initial injection temperature for the reductant; estimate the amount of accumulated reductant deposits present within the exhaust gas system; compare the amount of accumulated reductant deposits to a threshold amount of reductant deposits allowable in the exhaust gas system; and initiate a reductant deposit burn-off mode when the amount of accumulated reductant deposits is greater than the threshold amount of reductant deposits allowable in the exhaust gas system.
Abstract translation: 提供一种用于提高SCR装置的性能的系统和方法，特别是当还原剂在降低的温度下注入时，常规地减少积聚在排气系统中的还原剂沉积物的量。 该系统可以包括发动机，排气系统，SCR装置，注射装置和被配置为执行本方法的控制器。 所述控制器可以被配置为选择所述还原剂的初始注入速率和初始注入温度; 估计排气系统中存在的累积还原剂沉积物的量; 将累积的还原剂沉积物的量与排气系统中允许的还原剂沉积量进行比较; 并且当累积的还原剂沉积物的量大于排气系统中允许的还原剂沉积物的阈值量时，引发还原剂沉积燃烧模式。
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2.发明申请SYSTEM AND METHOD FOR ENHANCING THE PERFORMANCE OF A SELECTIVE CATALYTIC REDUCTION DEVICE 有权用于增强选择性催化还原装置的性能的系统和方法公开(公告)号：US20150059317A1
公开(公告)日：2015-03-05
申请号：US14010604
申请日：2013-08-27
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Rahul Mital , Jianwen Li , Justin Adam Shetney , Chang H. Kim , Matthew J. Myers
IPC: F01N11/00
CPC classification number: F01N11/002 , F01N3/021 , F01N3/208 , F01N9/00 , F01N9/002 , F01N2610/02 , F01N2610/1493 , F01N2900/102 , F01N2900/1411 , F01N2900/1602 , F01N2900/1606 , F01N2900/1812 , Y02A50/2325 , Y02T10/24 , Y02T10/47
Abstract: A system and method is provided for enhancing the performance of an SCR device, particularly by routinely reducing the amount of reductant deposits accumulated in an exhaust gas system, when the reductant is injected at a reduced temperature. The system may include an engine, an exhaust gas system, an SCR device, an injection device, and a controller configured to execute the present method. The controller may be configured to select an initial injection rate and an initial injection temperature for the reductant; estimate the amount of accumulated reductant deposits present within the exhaust gas system; compare the amount of accumulated reductant deposits to a threshold amount of reductant deposits allowable in the exhaust gas system; and initiate a reductant deposit burn-off mode when the amount of accumulated reductant deposits is greater than the threshold amount of reductant deposits allowable in the exhaust gas system.
Abstract translation: 提供一种用于提高SCR装置的性能的系统和方法，特别是当还原剂在降低的温度下注入时，常规地减少积聚在排气系统中的还原剂沉积物的量。 该系统可以包括发动机，排气系统，SCR装置，注射装置和被配置为执行本方法的控制器。 所述控制器可以被配置为选择所述还原剂的初始注入速率和初始注入温度; 估计排气系统中存在的累积还原剂沉积物的量; 将累积的还原剂沉积物的量与排气系统中允许的还原剂沉积量进行比较; 并且当累积的还原剂沉积物的量大于排气系统中允许的还原剂沉积物的阈值量时，引发还原剂沉积燃烧模式。
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