Method and systems for engine control
AssigneeTransportation IP Holdings, LLC
InventorsDavid Zielinski, Shishir Tiwari, James Robert Mischler, Michael Mangus, Matthew Hart
Life of this patent
Estimating the term…
Abstract
Various methods and systems are provided for controlling emissions. In one example, a controller is configured to respond to a sensed exhaust oxygen concentration by changing a fuel injection timing to maintain particulate matter (PM) within a range, and then adjusting an exhaust gas recirculation (EGR) amount based on NOx sensor output and based on the change in fuel injection timing.
Claims12
A controller configured to respond to a sensed exhaust oxygen concentration by changing a fuel injection timing to maintain particulate matter (PM) within a range, and then adjusting an exhaust gas recirculation (EGR) amount based on a NOx sensor output and based on the change in fuel injection timing.
A system, comprising:
- an exhaust oxygen sensor positioned in an exhaust system coupled to an engine;
- and
- a controller storing instructions in non-transitory memory executable to:
- adjust fuel injection timing responsive to an exhaust oxygen concentration measured by the exhaust oxygen sensor being below a reference exhaust oxygen concentration, while also adjusting an intake oxygen fraction in an intake system coupled to the engine.
Dependencies are inferred from the claim text.