Model based tempering air control and enhancement of exhaust for select catalytic reduction

A system for reducing an amount of a combustion product in an exhaust gas emitted from an engine, the system including:

• a catalytic surface to be exposed to the exhaust gas being emitted from the engine for promoting a reaction to convert at least a portion of the undesirable combustion product into a product suitable to be released into an ambient environment of the system;
• an intake manifold through which the exhaust gas is to flow before being introduced to the catalytic surface;
• a plurality of nozzles disposed adjacent to the intake manifold for introducing a tempering fluid at a plurality of different locations within the exhaust gas;
• a plurality of flow controllers in fluid communication with the nozzles for regulating introduction of the tempering fluid from the nozzles to the exhaust gas being emitted from the engine, said flow controllers being adjustable to regulate the introduction of the tempering fluid to the exhaust gas upstream of the catalytic surface;
• a sensor array for monitoring a parameter indicative of a temperature difference between the exhaust gas being introduced to a plurality of different portions of the catalytic surface;
• and
• a controller including a computer processor and a non-transitory computer-readable memory, wherein the computer processor is operable to relate the parameter sensed by the sensor array to an adjustment of one or more of the flow controllers based on information stored in the computer-readable memory to adjust introduction of the tempering fluid into exhaust gas and minimize the temperature difference, wherein
• the computer processor updates the information stored in the computer-readable memory relating the parameter to the adjustment of the one or more flow controllers based on said monitoring of the parameter by the sensor array.