| Summary: | 碩士 === 國立臺北科技大學 === 車輛工程系所 === 99 === For energy saving and carbon reduction in recent years, it is necessary to improve internal combustion engine for high efficiency and low pollution. Therefore, many vehicle industries began to research about improving the performance of internal combustion engines by variable valve timing (VVT). This study had designed a new electromagnetic valve by using both permanent magnet and electromagnet to improve the drawbacks of conventional double E-type coils electromagnetic valve. It effectively reduced energy consumption and carbon exhaust emission.
The objective of this study is divided into two parts. The first part is to perform dynamic simulation and soft landing control. From the simulation results, the dynamic responses of valve displacement, valve velocity, and the corresponding force are analyzed and used to design controller. It verifies the feasibility of current driving at high engine speed by the designed control strategy. In addition, Fuzzy Control and simple pulse control algorithm are used for soft landing control. The second part is to establish the experimental platform and the corresponding driving elements. The feedback signals from the position sensors are used as system inputs to obtain output current from controller to achieve the opening and closing for electromagnetic valve. The results obtained by the experiments of the overall operation, hardware architecture would allows an expected increasing performance in the future.
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