電子式氣閥多缸汽油引擎之動態性能模擬與分析

Dynamic Performance Simulation and Analysis for Multi-cylinder SI Engines Equipped with Electromagnetic valve

賴坤茂(Kun-Mao Lai)

指導教授 ： 蕭耀榮

國立臺北科技大學/機電學院/車輛工程系所/碩士(2006年)

摘要

電磁式氣閥機構(EMV)對於內燃機引擎而言為一種理想的的汽門驅動方式，傳統可變汽門正時引擎雖然比一般機械式凸輪驅動式在容積效率提升上具有顯著效果，但仍然無法滿足全轉速範圍的性能需求。EMV系統除了可透過更彈性的汽門正時控制來提升各轉速的性能外，另外可配合無節流閥引擎對特定轉速範圍進行汽缸關閉控制(cylinder deactivation)，達到降低燃料消耗率、增大扭力及減低廢氣排放量的目標。
本研究以所建立之配備有電磁式氣閥機構的四缸四行程引擎模型進行模擬，分析不同的進排汽門正時及不同汽門升程量條件下，引擎容積效率與性能之變化。並比較傳統凸輪驅動式汽門機構與電磁式氣閥機構在性能上之差異，證明電磁式氣閥機構應用於汽車引擎之可能性。

關鍵字

電磁式氣閥 ； 容積效率

並列摘要

For internal combustion engines, electromagnetic valvetrain(EMV) is an ideal system to drive valve opening and closing. Although the tranditional variable valve timing engines have significant improvement in volumemetric efficiency compared with the mechanical cam driven engines. But that improvement is still not enough fulfill the performance requirements in different engine operating conditions. EMV system not only can hance performance in all operation conditions though flixable valve timing control, but also can perform cylinder deactivations in some specific operating range. therefor, an EMV system can get lower fuel comsumption, higher torque and low emission.
This research develops an 4-stroke 4-cylinder engine model with electromagnetic valve. This dynamic model is used to simulate and analyz engine dynamics in different valve timings and valve lifts. The various engine volumemetric efficiencies and performances are then analyzed. Besides, the performances between an electro-
magnetic valve engine and conventional cam-driven engine are compared. This research proves that electromagnetic valve train can be applied to an automotive engine practically.

並列關鍵字

electromagnetic valve ； volumemetric efficiency

參考文獻

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