US 12,116,961 B1
Methods and systems for EGR system
Eric Luehrsen, Dearborn, MI (US); Sumanth Reddy Dadam, New Hudson, MI (US); Edward Doemer, Dearborn Heights, MI (US); Gladys Galicia, Shelby Township, MI (US); and Adam Krach, Canton, MI (US)
Assigned to Ford Global Technologies, LLC, Dearborn, MI (US)
Filed by Ford Global Technologies, LLC, Dearborn, MI (US)
Filed on Aug. 3, 2023, as Appl. No. 18/364,795.
Int. Cl. F02M 26/49 (2016.01); F02D 41/00 (2006.01); F02M 26/22 (2016.01); F02M 26/47 (2016.01); F02P 5/15 (2006.01)
CPC F02M 26/49 (2016.02) [F02D 41/0007 (2013.01); F02D 41/0047 (2013.01); F02M 26/22 (2016.02); F02M 26/47 (2016.02); F02P 5/1516 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
calculating a historical exhaust gas recirculation (EGR) valve average offset based on data from previous drive cycles;
sensing, via sensors of an engine control system, operating conditions during a current drive cycle;
calculating a present valve average offset based on the operating conditions;
comparing the present valve average offset to the historical EGR valve average offset;
monitoring an EGR leak, wherein monitoring the EGR leak comprises determining the EGR leak is not present when the present valve average offset is less than or equal to the historical EGR valve average offset.