公开(公告)号：US20190203623A1

公开(公告)日：2019-07-04

申请号：US15862482

申请日：2018-01-04

申请人： Ford Global Technologies, LLC

发明人： In Kwang Yoo ,  Michiel J. Van Nieuwstadt ,  Bret Alan Zimmerman ,  Samuel McClure

IPC分类号： F01N3/20 ,  F02M25/08

摘要： Methods and systems are provided for waking up a powertrain control module of an engine-driven vehicle during engine soak to perform an offset test of an exhaust NOx sensor. In one example, a method includes determining a duration to delay waking up the powertrain control module based on exhaust temperature at vehicle-off, waking up the powertrain control module after the duration has expired, and then initiating heating of the NOx sensor. After the NOx sensor lights off, heating continues for an additional duration before offset testing of the NOx sensor is performed.

公开(公告)号：US10513961B2

公开(公告)日：2019-12-24

申请号：US15862482

申请日：2018-01-04

申请人： Ford Global Technologies, LLC

发明人： In Kwang Yoo ,  Michiel J. Van Nieuwstadt ,  Bret Alan Zimmerman ,  Samuel McClure

IPC分类号： F01N11/00 ,  F01N3/20 ,  F02M25/08

摘要： Methods and systems are provided for waking up a powertrain control module of an engine-driven vehicle during engine soak to perform an offset test of an exhaust NOx sensor. In one example, a method includes determining a duration to delay waking up the powertrain control module based on exhaust temperature at vehicle-off, waking up the powertrain control module after the duration has expired, and then initiating heating of the NOx sensor. After the NOx sensor lights off, heating continues for an additional duration before offset testing of the NOx sensor is performed.