US Patent No. 9,297,327

OPERATION OF AN INTERNAL COMBUSTION ENGINE


Patent No. 9,297,327
Issue Date March 29, 2016
Title Operation Of An Internal Combustion Engine
Inventorship Helmut Hans Ruhland, Eschweiler (DE)
Albert Breuer, Cologne (DE)
Thomas Lorenz, Cologne (DE)
Moritz Klaus Springer, Hagen (DE)
Assignee Ford Global Technologies, LLC, Dearborn, MI (US)

Claim of US Patent No. 9,297,327

19. A system, comprising:
an engine;
a more-upstream exhaust gas oxygen sensor;
a more-downstream exhaust gas oxygen sensor;
an emission control device; and
a controller with instructions executable to:
during a first condition comprising decreased scavenging, adjusting fuel injection based on a more-upstream air-fuel ratio;
and

during a second condition comprising increased scavenging, stopping monitoring of the emission control device, and adjusting
fuel injection based on one or more more-downstream air-fuel ratios and not based on the more-upstream air-fuel ratio.