System and method for operating an exhaust gas recirculation valve

A control system for an engine having an exhaust gas recirculation (EGR) valve, the control system comprising:

• a controller operatively coupled to the EGR valve, the controller configured to:
• determine an amount of Carbon Monoxide (CO) in an exhaust from the engine;
• compare the amount of CO with a threshold CO value;
• and
• adjust open loop parameters of the EGR valve based on the comparison, wherein the controller is configured to control the EGR valve based on the open loop parameters during switching between a closed loop control and an open loop control of the EGR valve.

A method of operating an Exhaust Gas Recirculation (EGR) valve of an engine, the method comprising:

• monitoring an estimated EGR flow value for the EGR valve;
• determining an emission level in an exhaust from the engine;
• adjusting open loop parameters for the EGR valve based on the emission level, wherein the open loop parameters include a threshold EGR flow value at which a control of the EGR valve is switched between a closed loop control and an open loop control, a ramp-on time and a ramp-off time for the EGR valve;
• and
• controlling the EGR valve based on at least one of the adjusted open loop parameters and the estimated flow value for the EGR valve.