TY - JOUR AU - Shiao, Yaojung AU - Pan, Wei-Da PY - 2012/10/01 Y2 - 2024/03/28 TI - Design of a 3-Stage Voltage Controller for EMV Actuation in SI Engines JF - International Journal of Engineering and Technology Innovation JA - Int. j. eng. technol. innov. VL - 2 IS - 4 SE - Articles DO - UR - https://ojs.imeti.org/index.php/IJETI/article/view/74 SP - 273-282 AB - <p>Variable valve timing (VVT) provides SI engines several significant benefits in fuel economy, exhaust emission, and engine performance. Among all VVT mechanisms, electromagnetic valve (EMV) is a positive one by providing very high flexibility in valve timings and possibility of cylinder-by-cylinder VVT control. This paper presents a simple 3-stage voltage control method for EMV actuation to effectively reduce the contact velocity between EMV and valve seat. A voltage pattern for EMV actuation is derived first by a fuzzy logic controller. Then, this pattern is simplified into 3 level voltage in which the voltage magnitude and duration are analyzed and optimized. Simulation results show that the 3-stage voltage controller offers simple control algorithms and acceptable performance with low impact velocity.</p> ER -