发明名称 |
SYSTEM AND METHOD FOR CONTROLLING REDUCING AGENT INJECTION IN A SELECTIVE CATALYTIC REDUCTION SYSTEM |
摘要 |
An engine control system includes a dosing control module and an offset determination module. The dosing control module actuates an injector to inject a first amount of reducing agent into exhaust gas produced by an engine during a period when a temperature of the exhaust gas is greater than a predetermined temperature threshold. The offset determination module determines an efficiency of a selective catalytic reduction (SCR) material based on measured amounts of nitrogen oxide (NOx) during the period and expected NOx amounts, wherein the measured amounts of NOx are measured at locations upstream and downstream from the SCR material, and wherein the expected NOx amounts are based on the temperature of the exhaust gas and the first amount of reducing agent.
|
申请公布号 |
US2011041477(A1) |
申请公布日期 |
2011.02.24 |
申请号 |
US20090544672 |
申请日期 |
2009.08.20 |
申请人 |
GM GLOBAL TECHNOLOGY OPERATIONS, INC. |
发明人 |
MULLINS JASON DANIEL;DARR REBECCA J.;CRAWFORD KYLE E.;JASINKIEWICZ PAUL |
分类号 |
F01N3/20;F01N3/029;F01N9/00 |
主分类号 |
F01N3/20 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|