Cylinder Pressure Feedback Control Analysis Model

This paper contains a brief description of a mathematical model suitable for systematic cylinder pressure based analysis and control design. A linearized form and a simplified discrete form of the model are presented to illustrate the synthesis of a control system that resulted in cylinder-by-cylinder dilution limit control with coordinated optimal spark timing control. The control law was initially embedded into a rigorous dynamic-thermodynamic engine model characterization followed by implementation on an engine system and trimming of the control law gains in an experimental environment. Comparative modeling and simulation results are presented.