Controlling operation of an engine based on emissions monitoring

A method, comprising:

• calculating an estimated amount of emissions at a location of a selective catalytic reduction (SCR) element of a machine;
• calculating an estimated amount of emissions from an output of the SCR element;
• measuring, using a sensor at the output of the SCR element, an actual amount of emissions from the output of the SCR element;
• performing a comparison of the estimated amount of emissions from the output of the SCR element and the measured actual amount of emissions from the output of the SCR element;
• adjusting, based on the comparison, the estimated amount of emissions at the location of the SCR element;
• and
• controlling operation of an engine based on the adjusted amount of emissions.

A controller for controlling operation of an engine of a machine, the controller being configured to:

• calculate an estimated amount of emissions from an output of a selective catalytic reduction (SCR) element;
• measure, using a sensor at the output of the SCR element, an actual amount of emissions from the output of the SCR element;
• perform a comparison of the estimated amount of emissions and the actual amount of emissions;
• determine, based on the comparison, an estimated amount of emissions at a point within the SCR element;
• and
• control the operation of the engine based on the determined amount of emissions at the point within the SCR element.