Design and Control of Electromagnetic Valve for Gasoline Engines
碩士 === 臺灣大學 === 機械工程學研究所 === 98 === Internal combustion engines had been developed for many years, and many studies were devoted to improve performance of internal combustion engines. Electromechanical valve actuator (EMVA) drives each valve independently for achieving variable valve timing (VVT). T...
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| Format: | Others |
| Language: | en_US |
| Published: |
2010
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| Online Access: | http://ndltd.ncl.edu.tw/handle/65140337855046607160 |
| Summary: | 碩士 === 臺灣大學 === 機械工程學研究所 === 98 === Internal combustion engines had been developed for many years, and many studies were devoted to improve performance of internal combustion engines. Electromechanical valve actuator (EMVA) drives each valve independently for achieving variable valve timing (VVT). The main issue of the research is to achieve demands of the valves by the designs of a dual-channel parallel flux and hybrid magneto-motive force (MMF) valve system. The design procedures are: establishing mathematical model via magnetic circuit, optimization, and verification by finite element analysis (FEA). Mathematical model of EMVA is established in computer software to promote efficiency of developing control theory. Repetitive learning control (RLC) was developed to achieve soft landing and reduce noise and wear. The experimental results show that RLC significantly reduces armature landing velocity and noise. It is expected that the EMVA system with correct VVT control can replace camshaft-valve system and improve internal combustion engine performance in the future.
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