Document Type : Review Article

Authors

• Hossein Sharifi ¹
• Hasan Ghafori ²
• Behrooz Sadeghian ³

¹ Department of electrical engineering, Majlesi Branch, Islamic Azad University, Isfahan, Iran

² Department of Advanced Engineering Research, Majlesi Branch, Islamic Azad University, Isfahan, Iran

³ Department of Aerospace Engineering, Malek Ashtar University of Technology, Shahin Shahr, Iran

Abstract

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 2 mm to 0.001 mm and 0.1 seconds to 0.022 seconds, respectively. Poppet valve settling speed was 0.0126 and had a standard deviation of 0.1304 while the armature settling speed was 0.0184, with a standard deviation of 0.1363. Passes for the phases were -37.5 and -169, with gains of 10.3 and -9.35.

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