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題名 | 高壓噴油嘴驅動電路改善與流量測試之研究=Design of Injector Driving Circuit and Experiments for the Fuel Injection Quantity of a High-Pressure Injector |
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作者姓名(中文) | 蔡文昌; 吳宗樺; | 書刊名 | 高苑學報 |
卷期 | 17:2 2011.09[民100.09] |
頁次 | 頁13-21 |
分類號 | 447.188 |
關鍵詞 | 噴嘴驅動電路; 汽油缸內直噴; 機車引擎; Electrical driving circuit; Gasoline direct injection; GDI; Motorbike engine; |
語文 | 中文(Chinese) |
中文摘要 | 本研究主要在於建構汽油缸內直噴(GDI)引擎之高壓燃油供應系統、進行噴油嘴流量測試與研製一汽油 GDI噴嘴驅動器電路能穩定精確地控制 GDI高壓噴嘴之噴油量。由於高頻反應速度及瞬間大電流之負載需求,本研究噴嘴驅動器切換開關設計是採用絕緣閘雙極性電晶體(IGBT)或金屬氧化物半導體場效應電晶體(MOSFET)來取代普通電晶體,並進行高壓燃油噴射系統測試。本研究導入單段式電流及多段式電流噴嘴驅動器設計,測試時發現單段式 IGBT開關噴嘴驅動器會造成噴油嘴噴頭金屬應力疲勞,而減少其壽命,進一步重新設計三段式功率 MOSFET噴嘴驅動電路。本文進行了一些相關汽油 GDI引擎供油系統參數對噴油量變化之影響測試如供油系統壓力、引擎轉速、驅動器噴油脈波寬度變化對噴油量之影響。此外調整驅動電路之第一段拉開噴嘴油針之電磁閥線圈電流對噴嘴噴油量之影響也進行比較。另外,PWM控制被導入第三段式保持電流來加快噴嘴截止時間,其對噴油量之影響亦被在論文中討論,研究結果將可作為改善 GDI高壓噴油嘴驅動電路設計,各項引擎測試及精確的空燃比控制之參考。 |
英文摘要 | The research intends to construct a high pressure fuel supply system for GDI engines in order to test the injection quantity of the GDI injector. To fully utilizing the advantages of the GDI injector, designing the electric driving circuit with fast response and precision control for the GDI injector is required. In this paper, a programmable injector driving circuit using IGBT and POWER MOSFET switches for various high-pressure GDI injectors is designed and presented to satisfy the high frequency response and demand of the instantaneously heavy current. Investigations of the current driving circuit of single-pulse IGBT switch for GDI injectors are implemented in the paper. Due to the stress fatigue of the GDI injector nozzle caused by single-pulse IGBT driving circuit, three-pulse POWER MOSFET switch is introduced in the design of electrical driving circuit. The GDI injector coils are driven under three pulse width (12/4/2.5A) peak and holding current waveforms to generate the electromagnetic force to draw back and hold the nozzle needle of the injector. The stress fatigue and abnormal fuel squirts of the GDI injector were improved by using the redesigned driving circuit. The experimental tests for the designed electric driving circuit are investigated to verify its feasibility. The test conditions of the electric driving circuit are implemented for the injection quantity of the GDI injector under 60-10 Mpa fuel pressure, 1200~2000 μs injection pulse duration and DC 70V executing power voltage. Also, PWM control is introduced to the last pulse 3A holding current for quickening the cut-off response time of the GDI injector. Results show that this electric driving circuit of three-pulse POWER MOSFET switch is capable of operating stably and assure the accurate injection quantity of the gasoline direct injector. Also, results provide engines with important design references to improve the performance of the electric driving circuit for the GDI injector. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。