Engine-out nox virtual sensor for an internal combustion engine
AssigneeGM Global Tecnology Operations, Inc.
InventorsYue-Yun Wang, Yongsheng He, David B. Brown
Life of this patent
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Abstract
A method for controlling an internal combustion engine includes monitoring engine operation including a parameter descriptive of NOx generation within the engine, determining a fast transient NOx estimate with a dynamic model based upon the monitored engine operation, and during a fast transient engine operation including an increase in an operating state of the engine and a substantial closing of an exhaust gas recirculation valve, controlling an engine system based upon the fast transient NOx estimate.
Claims22
Method for controlling an internal combustion engine, the method comprising:
- monitoring engine operation comprising a parameter descriptive of NOx generation within the engine;
- determining a fast transient NOx estimate with a dynamic model based upon the monitored engine operation;
- and
- during a fast transient engine operation comprising an increase in an operating state of the engine and a substantial closing of an exhaust gas recirculation valve, controlling an engine system based upon the fast transient NOx estimate.
Method for controlling an internal combustion engine, the method comprising:
- monitoring engine operation including parameters descriptive of combustion within the engine;
- determining a steady state NOx estimate with an artificial neural network based upon the monitored engine operation;
- determining a fast transient NOx estimate with a dynamic model based upon the monitored engine operation;
- during a fast transient engine operation comprising an increase in an operating state of the engine and a substantial closing of an exhaust gas recirculation valve, determining an engine out NOx estimate based upon the steady state NOx estimate and the fast transient NOx estimate;
- and
- controlling operation of a system within the vehicle based upon the engine out NOx estimate.
Method for controlling an internal combustion engine, the method comprising:
- modulating output torque of a test engine and monitoring operation of the test engine through a fast transient engine operation comprising an increase in an operating state of the engine and a substantial closing of an exhaust gas recirculation valve, said monitoring operation comprising monitoring an engine out NOx sensor to determine an actual engine out NOx;
- modeling the monitored operation, utilizing a steady state NOx estimation to determine an estimated engine out NOx;
- determining a residual between the actual engine out NOx and the estimated engine out NOx, the residual determining a fast transient engine out NOx estimate;
- and
- controlling operation of an exhaust aftertreatment system based upon the fast transient engine out NOx estimate.
Dependencies are inferred from the claim text.