臺灣博碩士論文加值系統

本研究主要研究機車電子噴射引擎上之DCP噴油嘴總成，觀察其噴油形狀並量測流率，了解該噴油嘴總成噴油特性。首先選定搭載在機車電子噴射引擎的噴油嘴總成為研究對象，建立噴油嘴總成性能檢測實驗平台，量測噴油嘴總成基本性能資料，詳細分析其操作狀況下燃油噴射過程的機制。
DCP噴油嘴總成內主要構成元件包括燃油泵模組與噴射器兩部份，工作原理為給DCP噴油嘴總成驅動電壓使電磁閥產生推力，進行壓縮行程而將空氣排出。隨即關閉閥門維持艙內相對高壓，並利用高壓推動汽油，由噴口射出；當停止驅動DCP噴油嘴總成，噴射結束，利用彈簧的作用回復壓縮器原始狀態。因應實際需求，亦模擬DCP噴油嘴總成工作電壓改變參數下，對DCP噴油嘴總成噴射效能影響，作為未來機車DCP噴油嘴噴射系統技術開發參考。
本研究用LabVIEW軟體建立圖控程式，控制DCP噴油嘴的各項實驗參數操作條件，如噴油嘴作動頻率；噴油嘴噴射作動時間；作動時間等，並使用CCD高速擷取噴油嘴流場情形，觀察關鍵參數電壓、真空壓力等，對DCP噴油嘴與傳統噴油嘴流量之差異性。

DCP is composed of two major components: a fuel pump module and an injector. With a prescribed voltage waveform imposed on DCP, the inner solenoid valve is first activated to start the compression stage for expelling air bubble. After that, the valve is immediately closed to build up the high pressure inside DCP for forcing gasoline passing through the nozzle. In response to the shutdown of electrical power, DCP restores to its original rest state in the end of the ejection stage. The gasoline liquid jet with adequate inertia momentum would overcome the liquid surface tension and viscous force for accomplishing the droplet injection. The present study has successfully constructed the test and measurement platform to determine the baseline mass flowrate characteristics for a DCP device. To establish a useful database for the future development of the injection technology for motorcycles, this work is also extended to explore the variations of injection performance at different settings of environmental pressure, temperature, and voltage of battery.
This Study sets up to control program by the LabVIEW, which can controls every experiment parameter control condition of DCP fuel injection, such as operative frequency of the fuel injection, the operative time of the fuel injection sprays, etc. It uses CCD to pick a fluent situation of the fuel injection that can observes the difference flows of key parameter of the voltage and vacuum pressure to DCP injection and traditional fuel injection.

目錄

封面內頁
簽名頁
授權書 iii
中文摘要 iv
英文摘要 v
誌謝 vi
目錄 vii
圖目錄 ix
表目錄 xii
符號說明 xiii

第一章　前言
第一節 前言 1
第二節 文獻回顧 2
第三節 研究目的 4
第二章　噴油嘴原理及實驗平台架構
第一節 傳統噴油嘴原理及構造 6
第二節 DCP噴油嘴原理及構造 6
第三節 DCP噴油嘴實驗測試平台 14
第四節 DCP噴油嘴元件功能檢測 34
第三章　結果與分析
第一節 DCP噴油嘴元件基本功能檢測結果 37
第二節 DCP噴油嘴基本流場闡述 38
第三節 燃料－空氣供應系統 39
第四節 DCP噴油嘴室溫常壓條件下檢測結果 40
第五節 噴油嘴於室溫常壓條件下檢測結果 43
第六節 延遲時間具體量測 58
第七節 探討溫度變化對流量的影響 62
第八節 溫度補償係數試驗 63
第九節 真空負壓下條件測試 66
第十節 不準確度分析 68
第四章　結論
第一節 結論 70
第二節 建議及未來展望 72
參考文獻 74

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