逆向工程技術應用於汽油引擎進氣氣道開發之研究

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姓名

郭憲德(Hsien-Ter Kuo) 查詢紙本館藏

畢業系所

機械工程學系

論文名稱

逆向工程技術應用於汽油引擎進氣氣道開發之研究
(inlet port development of gaoline engine by applying the reverse engineering technology)

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摘要(中)

四衝程汽油引擎進氣氣道之良窳，對容積效率具有決定性影響，而容積效率則影響到引擎的出力。車輛界常使用穩流狀態下之流量試驗，量測進氣氣道之質量流量及計算流量係數(Flow Coefficient)，作為評估進氣氣道是否符合設定目標。進氣氣道之開發流程，係參酌經驗或設計準則，設計2D 圖面及3D 模型、製作流量盒(Flow Box)、進行穩流狀態下之流量試驗、修改流量盒再進行流量試驗，一直到符合所設定之流量係數目標，再將此一最終之流量盒作為產品開發用途。本文嘗試運用逆向工程技術以輔助或改善進氣氣道開發流程中之某些作法，以期達到更快速及精確地開發新產品與改良既有之產品，並將開發過程相關資料回饋至原有CAD 模型，改善整體進氣氣道之開發流程。

摘要(英)

The performance of the inlet port in four stroke gasoline engine has great influence on the volumetric efficiency which affects the output of the engine. It is often in the automotive industry to perform a steady state flow test across the inlet port to acquire the actual mass flow rate and calculate the flow coefficient to evaluate whether the inlet port design meets the pre-defined requirement or not. By following the development procedure of the inlet port, some design guidelines as well as engineer’s experience are used to conduct the 2D inlet port design and its 3D model. A flow box is then manufactured to perform a trial and error test on the steady-state flow bench until the pre-defined target is achieved. The improved flow box is then used to go through the rest of the product development process. The objective of this research is to apply the technology of reverse engineering to assist or improve the inlet port development tasks, and hopefully, to make the product modification and development more precisely and quickly. The modified data of the inlet port could be feedback to the original CAD model so that the entire port development process can be improved.

關鍵字(中)

★ 容積效率
★ 進氣氣道
★ 四衝程引擎
★ 流量係數
★ 逆向工程

關鍵字(英)

★ inlet port
★ volumetric efficiency
★ flow coefficien

論文目次

摘要 ...................................................................................................................I
ABSTRACT........................................................................................................ II
致謝 ................................................................................................................ III
目錄 ................................................................................................................IV
圖目錄 ................................................................................................................VI
表目錄 ............................................................................................................. VIII
第一章緒論......................................................................................................... 1
1.1 前言........................................................................................................ 1
1.2 文獻回顧................................................................................................ 3
1.2.1 逆向工程技術在工業界之應用................................................. 3
1.2.2 四衝程汽油引擎進氣氣道的設計、開發................................. 6
1.3 研究目的與方法.................................................................................... 8
1.4 論文架構............................................................................................. 13
第二章標準流量盒之CAD 模型重建及加工複製........................................ 14
2.1 前言...................................................................................................... 14
2.2 建構3D 實體模型............................................................................... 14
2.2.1 逆向掃描及建構線及面模型................................................... 15
2.2.2 使用市售軟體CATIA 正向建構3D 實體模型..................... 16
2.3 製作掃描流量盒................................................................................... 17
2.4 標準流量盒與掃描流量盒之幾何差異與討論.................................. 17
2.4.1 CAD 模型誤差比對.................................................................. 17
2.4.2 曲面誤差分析........................................................................... 18
2.4.3 誤差分析結果綜合討論........................................................... 18
第三章進氣氣道流量實驗................................................................................ 30
3.1 前言....................................................................................................... 30
3.2 流量方程式之推導............................................................................... 30
3.2.1 流量係數................................................................................... 30
3.2.2 理論質量流量m

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指導教授

賴景義(Jiing-Yih Lai)

審核日期

2007-7-19

推文