汽門間隙與引擎轉速在全負荷狀態下對引擎性能之影響

The effects of valve clearance and engine speed on the performance of a gasoline engine in full load condition

王泗華(Ssu-Hua Wang) ； 彭錦樵(Jin-Chyau Peng)

《農業機械學刊》 10卷1~4期 (2001/03) Pp. 73-83

https://doi.org/10.30062/JAM.200103.0006

摘要

本研究針對四行程汽油引擎，探討全負荷狀態下，各種不同汽門間隙及引擎轉速，對引擎扭力、制動馬力及燃料消耗率的影響。
研究結果顯示，於全負荷狀態下：(1)在最大引擎扭力之轉速點3100 rpm以前，其引擎性能之整體表現與汽門間隙大小呈現正相關，即汽門間隙較大表現較佳。但在3400 rpm以後，則以汽門間隙於0.35 mm之規格值時的表現較佳。(2)整體引擎扭力曲線呈現出圓滑對稱之現象，最大扭力出現在引擎轉速3100 rpm處。(3)引擎之最大制動馬力約出現在4600 rpm~4900 rpm處。(4)本研究採用雙管化油器，因此，各不同汽門間隙之最低燃料消耗率的出現點並不一致。(5)本研究之成果將可提供使用者、維修者及相關研究人員之參考依據。

關鍵字

汽油引擎 ； 汽門 ； 引擎性能

並列摘要

A four- stroke gasoline engine was used to study the effects of engine speed and valve clearance on the engine torque, brake horse power, and brake specific fuelcon sumption of this engine. The full load experimental results showed that: (1)The overall results of engine performance for engine speeds lower than 3100 rpm had positive relationship with valve clearance. However, the 0.35 mm valve clear ance had the best engine performance for engine speeds higher than 3400rpm. (2)The engine torque curve was symmetrical and the maximum torque was happened at 3100 rpm engine speed. (3)The maxim brake horsepower was happened at 4600 rpm～4900 rpm engine speed. (4)The minimum brake specific fuel consumption for different valve clearances were located at different engine speed owing to the double-tube carburetor of the experimental engine. (5)The experimental results could be provided to the users and repairmen of a four stroke gasoline engine for reference.

並列關鍵字

Gasoline engine ； Valve ； Engine performance