论文部分内容阅读
现在,我国的新型拖拉机保有量逐年递增,但在使用上还是许多的老机手在操作。由于他们的文化水平不高,对于新型发动机的使用保养不甚明了,于是,我们运用图解的方法加以介绍,以方便广大农机手的操作使用。本期介绍拖拉机用柴油发动机气门间隙调整的方法。气门间隙:气门摇臂与气门杆端部的间隙。气门间隙之所以存在,是因为进排气门均安装在燃烧室的顶端,也是温度最高之处,为了留有膨胀的空间,因而必须存有空隙。柴油发动机气门间隙的大小,因厂家设计不同而不一致,通常进气门间隙在0.30～0.45mm之间,而排气门间隙由于受热膨胀比进气门侧的大,所以间隙更大些,一般在0.40～0.45mm之间。间隙过大,会导致进、排气门开启迟后,缩短了
Now, the new type of tractor in our country keeps increasing year by year, but it is still being used by many old knuckles. Due to their low level of education, the maintenance and use of the new engine is not clear. Therefore, we use the graphic method to introduce the operation to facilitate the operation of agricultural machinery. This issue describes the tractor diesel engine valve clearance adjustment method. Valve Clearance: Clearance between valve rocker arm and valve stem end. Valve clearance exists because the intake and exhaust valves are mounted on the top of the combustion chamber, which is also where the temperature is highest, so there must be room for expansion. Diesel engine valve gap size, due to different manufacturers design inconsistencies, usually between the intake valve clearance 0.30 ~ 0.45mm, while the exhaust valve gap due to thermal expansion than the intake valve side, so the gap larger, the general Between 0.40 ~ 0.45mm. The gap is too large, will lead to intake and exhaust opening late, shortened