SYSTEM AND METHOD FOR REGULATING EXHAUST GAS RECIRCULATION IN AN ENGINE

The present disclosure includes a system and method for regulating exhaust gas recirculation ("EGR") in an engine 10. In one embodiment, the system may include a knock sensor 23coupled to the engine that sends a signal corresponding to at least one operating condition of the engine to a controller 25. The controller may estimate an amount of EGR gas administered to the engine and regulate the amount of EGR gas being administered to the engine when the estimated amount of EGR gas is not an effective amount.