Methods and systems are described for an engine with a SCR system including NOx sensors upstream and downstream of catalyst. One method includes monitoring SCR performance via calculating SCR conversion efficiency at different catalyst temperatures. Further, feedgas NOx levels are artificially increased when SCR device temperature is above a threshold to obtain more reliable readings from NOx sensors.
申请公布号
MX2014015478(A)
申请公布日期
2015.07.02
申请号
MX20140015478
申请日期
2014.12.16
申请人
FORD GLOBAL TECHNOLOGIES, LLC
发明人
SMITH, JASON RONALD;BOGEMA, JOHN PAUL;LYON, PETER MITCHELL;MANGION, JOHN ANTHONY;MURPHY, KEVIN R.;LUKE, DARRIN BLAINE