26-01-2017 дата публикации
Номер: US20170022865A1
Implementations described herein relate to utilizing discrete transient local state space models to modify an output from a steady state NOestimation model to provide a final estimated NOvalue. An engine operating space, defined by a speed and injection quantity map, is subdivided into several discrete local state spaces and a transient model is developed for each discrete state space to output a NOestimation correction value. The transient models may be a regression model or the transient model may be an empirical map of data values. The NOestimation correction value modifies a steady state NOvalue to calculate the final NOestimated value. The final NOestimated value is then output to another component, such as a controller as an input for controlling one or more components of an engine, an aftertreatment system, and/or a diagnostic system. 1. A method comprising:accessing, by a controller, a set of one or more combustion parameters;{'sub': 'x', 'determining, using the controller, a steady state estimated NOvalue based on a steady state model and the accessed set of one or more combustion parameters;'}{'sub': 'x', 'determining, using the controller, a NOestimation correction value based on a transient model and the accessed set of one or more combustion parameters;'}{'sub': x', 'x', 'x, 'calculating, using the controller, a final estimated NOvalue based on the determined steady state estimated NOvalue and the determined NOestimation correction value; and'}{'sub': 'x', 'outputting the final estimated NOvalue as a parameter value to an aftertreatment system component or an engine component.'}2. The method of claim 1 , wherein the set of one or more combustion parameters comprises an intake manifold pressure claim 1 , an intake mass air flow claim 1 , an exhaust manifold pressure claim 1 , or an engine-out NOconcentration.3. The method of further comprising:accessing a state space set of parameters comprising an engine speed, an injection quantity, or a start time of ...
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