新型噴油嘴實驗平台建構與測試

Characteristics of a DCP

張舜長(Shun-Chang Chang) ； 楊安石(An-Shih Yang) ； 侯孟良(Meng-Liang Hou) ； 詹宗興(Zong-Sing Jhan)

《科學與工程技術期刊》 4卷4期 (2008/12) Pp. 79-87

https://doi.org/10.7117/JSET.200812.0079

摘要

本實驗主要研究機車電子噴射引擎上之新型噴油嘴總成，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爲研究對象，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，詳細分析其額定操作狀況下燃油噴射過程的機制。
新型噴油嘴總成內主要構成元件包括燃油幫浦模組與噴射器兩部份，工作原理爲給新型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；當停止驅動新型噴油嘴總成，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，亦模擬新型噴油嘴總成工作電壓改變參數下，新型噴油嘴總成噴射效能影響，作爲未來新型機車噴射系統技術開發參考。

關鍵字

燃油幫浦 ； 噴油嘴

並列摘要

A DCP (discharge pump) consists of two major components: a fuel pump module and an injector. With a prescribed voltage waveform imposed on the DCP, the inner solenoid valve is first activated to start the compression stage for expelling air bubbles. Next, the valve is immediately closed to increase the high pressure within the pump to force the gasoline passing through the nozzle. In response to a shutdown of electrical power, the DCP is restored to its original resting state at the end of the ejection stage. A liquid gasoline jet with adequate inertia momentum will overcome the liquid surface tension and viscous force for accomplishing the droplet injection. In the present study, we successfully constructed a testing and measurement platform to determine the baseline mass-flow rate characteristics of a DCP device. To establish a useful database for the future development of injection technology for motorcycles, this research was also extended to explore the variations in injection performance at different environmental pressure, temperature, and battery voltage settings.

並列關鍵字

fuel pump ； injector ； injection performance