Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/2623
標題: 利用微電腦控制機油供應以減低二行程機車引擎排放白煙之研究
The Study of Decreasing Exhaust White Smoke Via the Microcomputer Control Oil Supply for 2-Stroke Motorcycle Engines
作者: 洪晏清
Hung, Yan-Ching
關鍵字: 2-stroke engine;二行程引擎;white smoke;白煙
出版社: 機械工程學系
摘要: 
二行程機車所排放之白煙,最主要是由於沒有燃燒或燃燒不完全的機油顆粒所造成的,所以二行程機車會排放白煙與機油之種類(成份)及機油之供給量等兩個因素有關;但對二行程機車使用者而言,其購買機油時,一般會選擇價格低廉之機油,而不會選擇價格昂貴之低煙度機油,因而本篇論文針對機油之供給量進行探討研究。
而本篇論文是利用微電腦控制方式供給適當機油,以彌補機械式機油泵之缺點,使二行程機車之機油消耗減少,而降低白煙產生之研究。研究中使用50㏄氣冷式二行程機車引擎在動力計上進行各項試驗研究。
研究中發現,當瞬間增加(或減少)機油量時,煙度並不會馬上增加(或減少),這表示沒有隨著廢氣排出之機油,將會堆積於排氣管內;且當全負載(煙度1%),轉速2000rpm、3000rpm、4000rpm、5000rpm、6000rpm時,其機油供給量只要機械式機油供應系統供油量之29.2﹪、34.8﹪、47.1﹪、62.7﹪、81.8﹪。所以二行程機車之機械式機油供應系統於供油時,有過量情形;當轉速愈低,其供油過量之情形愈嚴重。因此利用微電腦控制機械式機油供應系統之控制桿角度來調整適當機油供給量,使機油消耗量減少,進而達到降低白煙的目標。
研究結果中也發現到經微電腦控制方式調整機油供給量後,對二行程機車引擎所排放之HC/CO也有減低之效果,尤其是在全負載下之減低效果更加明顯。

The white smoke exhausted by two-stroke motorcycles, mainly is caused of no combustion or the incomplete oil compound combustion. Exhaust are related by the compound of engine oil and oil consumed. But speaking of two-stroke motorcycles user, when he/she purchases engine oil, generally can choose the price inexpensive engine oil, rather than choose a price expensive and low smoke engine oil, thus this thesis conducts the discussion research supplies of quantity in view of the engine oil.
The study uses the microcomputer control mode supplies adequate amount of engine oil to make up the shortcoming of the mechanical type oil pump. The consequence is the reduce oil consumption. Therefore the exhaust of white smoke is decreased. The study uses 50㏄ air-cooling engine and conducts the experimental study on the power gauge.
The study indicted that increase(or decrease) engine oil supply suddenly would not result in the increase(or decrease) of smoke simultaneously. It implied that the residue oil along with waste gas would be stored in the exhaust muffle. In contrast of mechanical type supply system, when power setting was selected in full load (smoke 1%) and rotational speed were 2000rpm, 3000rpm, 4000rpm, 5000rpm, 6000rpm, that made quantity of oil supplies as low as 29.2﹪, 34.8 ﹪, 47.1 ﹪, 62.7 ﹪and 81.8 ﹪respectly. It was determined that mechanical type of oil supply system of two-stroke motorcycles overfeed the system. When lower the rotational speed, it made the situation became severely. To reduce exhaust amount of the white smoke and supplying the adequate oil quantity control via the control stick angle of the microcomputer control. Therefore the oil consumption is reduced for mechanical type oil supply system.
In the findings also discovered when the microcomputer control mode adjusted oil supply quantity, the discharges HC/CO has also decreased. And it would be more apparent when full power setting is selected.
URI: http://hdl.handle.net/11455/2623
Appears in Collections:機械工程學系所

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