Predictive modeling and reducing cyclic variability in autoignition engines

摘要

Methods and systems are provided for controlling a vehicle engine to reduce cycle-to-cycle combustion variation. A predictive model is applied to predict cycle-to-cycle combustion behavior of an engine based on observed engine performance variables. Conditions are identified, based on the predicted cycle-to-cycle combustion behavior, that indicate high cycle-to-cycle combustion variation. Corrective measures are then applied to prevent the predicted high cycle-to-cycle combustion variation.

主权项

1. A method of controlling a vehicle engine to reduce cycle-to-cycle combustion variation, the method comprising:
applying a predictive model to predict cycle-to-cycle combustion behaviour of an engine based on observed engine performance variables; identifying conditions that indicate high cycle-to-cycle combustion variation based on the predicted cycle-to-cycle combustion behaviour; and applying corrective measures to prevent the predicted high cycle-to-cycle combustion variation, wherein applying a predictive model to predict cycle-to-cycle combustion behaviour of an engine includes:
applying a predictive model based on temperature of an engine cylinder and a cylinder charge composition at the end of a combustion cycle.