Nonlinear torque control of a spark-ignited engine

A nonlinear state space controller for the optimal torque of a spark-ignited engine is proposed. The controller design is based on feedback linearization in combination with pole placement. The resulting controller basically compensates the intake manifold filling dynamics and thus improves tracking performance of torque demand changes generated by the driver. A nearly uniform tracking response is achieved for the significantly nonlinear engine plant. The controller is implemented on a rapid prototyping platform, experimental results are presented