| 摘要: | 轉子引擎普遍具有體積小、重量輕、馬力大的優勢，能夠與電動車結合，作為電力不足時的備用動力來源，增加車輛行駛里程，其中最為人所知的是日本馬自達汽車公司所研發之轉子引擎。本論文目的，在開發創新之蚶線形滑轉板轉子引擎，它具有前述之優勢且結構更為簡單，並配合3D電腦輔助設計軟體建立引擎之立體模型。此引擎圍繞著蚶線之特性進行設計，其主要組成包含壓縮部與動力部，各別設有進氣口與排氣口，壓縮部包含蚶線形汽缸、轉子及滑轉板，轉子兩端延伸出輸出軸以輸出動力，滑轉板將蚶線形汽缸分成兩個獨立空間，隨著轉子與滑轉板的轉動，兩空間改變其體積以進行壓縮或膨脹行程。動力部與壓縮部之內部結構基本相同，只有進氣口與排氣口的大小與位置設置不同以及動力部是呈180°鏡向於壓縮部來設置，其中壓縮部轉子與動力部轉子存在著15°的相位差。透過壓縮部轉子與滑轉板轉動將汽缸內之燃氣壓縮至動力部，當動力部進氣口關閉時點火引燃燃氣，產生之高壓氣體推動動力部滑轉板，帶動動力部轉子轉動並由輸出軸輸出動力，壓縮部轉子與動力部轉子乃呈共軸同步運轉。而此引擎之汽缸，被分割為兩個獨立空間同時運作，因此每360°就會有兩次的爆炸動力行程，優於活塞引擎720°才有一次爆炸動力行程。最後，進行CNC加工製作壓縮部金屬冷模型，量測其排氣流量、壓縮壓力以及摩擦損失，驗證此引擎之設計概念與壓縮效能，並以此冷模型為基礎構思出蚶線形滑轉板轉子引擎之完整結構，以進行壓縮部與動力部結合之製作，其中也包含化油器、啟動馬達、齒輪箱、配重飛輪、火星塞引燃系統和冷卻流道設計製作等。;Generally, the advantages of the rotary engine are its compact size and light weight with high horsepower. The rotary engine can be used as a backup power source for the electric vehicle to allow extra mileages when the car battery is low and needs to be charged. The purpose of this thesis is to develop an innovative limacon (蚶線) slide rotating plate rotary engine, which not only has the aforementioned advantages but also has simpler design and structure than the conventional Wankel rotary engine. We apply SolidWorks (a 3D computer aided software) to design the limacon slide rotating plate rotary engine that mainly includes the compression part and the power part, each having an intake port and an exhaust port. Both parts consist of a limacon cylinder, a rotor and a slide rotating plate, but they have 180° mirror inversion. The shafts extend from both sides of the rotor to output power and the slide rotating plate divides the limacon cylinder into two separate compartments. With the rotation of the rotor and the slide rotating plate, two spaces change their volume for the compression stroke or the expansion stroke. The design of the power part and the compression part is basically the same, except that the area and the position of the intake port and the exhaust port are different. The power part is set by 180° mirror with respect to the compression part, in which there is a 15° phase difference between the compression rotor and the power rotor. The fuel/air mixture is injected into the compression cylinder, which is compressed to the power part through the rotation of the compression rotor and the slide rotating plate. The mixture is ignited when the intake port of the power part is closed. The high pressure burned gases drive the slide rotating plate, rotate the rotor of the power part, and output power by the shaft. Note that the compression rotor coaxially rotates with the power rotor synchronously. Because the cylinder of this engine is splited into two separate spaces that operate at the same time, there are two explosive power strokes per 360°, which is better than the piston engine(one explosive power stroke per 720°). Finally, the metal model of the compression part is manufactured by CNC processing. The exhausted flow rate, the compression pressure and the friction loss are measured to verify the design concept and the compression efficiency of the engine. Based on this compression part model, a complete construction of the limacon slide rotating plate rotary engine including the power part is designed and manufactured, which also combines the carburetor, the starter motor, the weight-balanced flywheels, the spark plug ignition system, and the cooling flow passage design. |
