廢氣成分與汽油噴射引擎控制系統關係之研究

Exhaust Emission and Electronic Gasoline Injection Engine Control System

林明俊(Ming-Chung Lin) ； 葉榮鵬(Jung-Peng Yeh) ； 胡書庭(Shu-Ting Hu)

《南亞學報》 31期 (2011/12) Pp. 187-203

https://doi.org/10.6989/JN.201112.0187

摘要

本研究以HERMANN MHC218廢氣分析儀、MUT-II及CGS2000多功能電表測量電子控制汽油噴射引擎在空負載條件下，從起動、溫車到引擎到達工作溫度的怠速運轉，以及急加速、急減速等狀態下的廢氣成分，並藉由量測噴油嘴之噴油脈寬（injection pulse width）、怠速控制閥（ISC/IAC）之工作循環率（duty cycle）或步進數（number of steps），探討引擎在各種運轉條件下設計之基本理念，並推論引擎電腦系統之控制策略與反應靈敏度。研究結果發現，三元觸媒轉換器在達到工作溫度後，幾乎能將CO、HC淨化完全，本文並提出引擎溫車怠速時，能將ISC的開度與引擎運轉的目標轉速增加，以及急減速時能ISC的開度先增加再緩降之建議，以降低CO與HC之排放量。本文規劃的實驗計劃法與成果可提供社會消費大眾對車輛選擇之參考，且可提昇車輛研發及保修人員之技術層次及相關能力。

關鍵字

噴油脈寬 ； 工作循環率

並列摘要

In this study, the exhaust emission of the electronic gasoline control engine was measured and analyzed by HERMANN MHC218 gas tester, MUT-II and CGS2000 multi-meter. During the research procedures, a series of engine operating modes, including starting mode, warm up mode and run mode in the empty load idle engine speed, acceleration mode and deceleration mode. Besides, the injection pulse width, the duty cycle or the step number of idle speed control valve(ISC/IAC) that were measured to probe into the basic idea that the engine is designed under various kinds of operation conditions. This also inferred the control strategy and sensitivity of response of the engine control module from the result. It was found that the three-way catalyst converter could nearly purify CO and HC when it reached working temperature. In order to reduce the emission of CO and HC, this proposes that the ISC could adopt wider open degree and higher engine idle speed in engine warm up mode. ISC degree also could increase first then decrease gradually in engine deceleration mode. The experiment plan law and achievement of this text can offer the reference for the consumers to choose the vehicle. It also can promote the vehicle research, vehicle development, technician's technological level and relevant ability.

並列關鍵字

injection pulse width ； duty cycle