Patent Document ID: 9677493
Application ID: 13236217
Patent Flag: 1

Claim One:
1. A method for selective catalytic reduction, comprising: configuring an engine controller according to a first model of a diesel engine and associated components, wherein the first model takes first input parameters, outputs first output parameters, and has a first time constant; configuring a selective catalytic reduction controller according to a second model of an exhaust after-treatment device, wherein the second model of the exhaust after-treatment device takes second input parameters, outputs second output parameters, and has a second time constant which is greater than the first time constant, and wherein the selective catalytic reduction controller is coupled to the engine controller and receives the first output parameters from the engine controller; applying the engine controller to a diesel engine, wherein the engine controller takes first input parameters; applying the selective catalytic reduction controller to a catalytic reduction system for treatment of an exhaust with selective catalytic reduction and coupling the selective catalytic reduction controller to the engine controller, wherein the selective catalytic reduction controller outputs the first input parameters to the engine controller; coordinating the engine controller and the selective catalytic reduction controller to increase fuel efficiency and reduce pollutants; and coordinating a change in the first input parameters of the engine controller, by the selective catalytic reduction controller, to allow for a reduction of pollutants and an increase the fuel efficiency.