Electromagnetic Valve Control in Internal Combustion Engines by PID

Engines with variable poppet valve timing systems are among numerous efforts that aim to reduce engine emissions and/or increase efficiency. In the present paper we have investigated the stability of a magnetic valve system in MATLAB. First we designed the magnet and interactive forces inside the electromagnetic valve system, then we produced a mechanical model for the system by using a two degree of freedom mass and spring system and finally designed a PID controller to maintain system stability. The results of the present study indicate that the controller had decreased the maximum valve displacement domain and duration from ۲ mm to ۰.۰۰۱ mm and ۰.۱ seconds to ۰.۰۲۲ seconds, respectively. Poppet valve settling speed was ۰.۰۱۲۶ and had a standard deviation of ۰.۱۳۰۴ while the armature settling speed was ۰.۰۱۸۴, with a standard deviation of ۰.۱۳۶۳. Passes for the phases were -۳۷.۵ and -۱۶۹, with gains of ۱۰.۳ and -۹.۳۵.

Keywords:

Electromagnetic poppet valve actuator , Hossein Sharifi , en , Variable poppet valve timing system , Islamic Azad University , Magnetic capacity , Majlesi Branch , PID Controller , Department of Electrical Engineering