Abstract: A control system includes a knock sensor and a controller. The knock sensor is configured to generate a notification signal by sensing a plurality of engine cylinder events in an engine. The controller is electrically coupled to the knock sensor and configured to detect a plurality of stochastic pre-ignition events in response to the plurality of engine cylinder events, calculate a real-time rate of the plurality of stochastic pre-ignition events, calculate a ratio of the real-time rate to an allowable rate of the engine, and adjust a current allowable torque of the engine in response to the ratio and a rotational speed of the engine.

Abstract: An engine assembly includes an engine structure defining a combustion chamber. An intake system includes an intake manifold in communication with the combustion chamber. An exhaust system includes an exhaust conduit in communication with the combustion chamber. An exhaust gas recirculation system includes an EGR tube providing communication between the intake and exhaust systems, the EGR tube includes an end portion extending a distance into the intake system in a direction opposing air flow to the intake manifold.