Abstract
Recent gasoline engine control primarily uses feedforward-based control strategies composed mainly of MAPs. However, these methods cannot account for variations between individual engines. Therefore, real-time control is required to optimize engine control parameters in response to the combustion state. In this study, an extremum-seeking control method was proposed to achieve maximum thermal efficiency and stable operation by adjusting the fuel injection timing and combustion phase based on the in-cylinder pressure signal. The proposed control method was implemented on a production four-cylinder gasoline engine and experimentally evaluated. As a result, IMEP of the proposed control method was higher than that of the MAP value and the proposed control method optimized the ignition and fuel injection timing.
