论文部分内容阅读
调整一台S195柴油机的气门间隙时发现,在压缩上止点将气门间隙调到标准值,但飞轮转到进排气门关闭刚结束的位置时,气门间隙却有1.5～1.8毫米。气门间隙老是调不准。拆卸凸轮轴检查。未发现有变形情况。检查了前后衬套,发现后衬套与凸轮轴配合间隙为1.9毫米,前衬套间隙为1.6毫米。更换了凸轮轴前后衬套后,气门间隙调整就正常了。为什么凸轮轴衬套磨损后气门间隙老是调不准呢?因为气门在开启位置时。由于气门(?)轴压力,
When adjusting the valve clearance of an S195 diesel engine, it was found that the valve clearance was adjusted to the standard value at the compression top dead center, but the valve clearance was 1.5 to 1.8 mm when the flywheel was shifted to the position where the intake and exhaust valves were just closed. Valve clearance is always adjusted not allowed. Remove camshaft inspection. No deformation was found. After checking the front and rear bushings, it was found that the clearance between the rear bush and the camshaft was 1.9 millimeters and the clearance of the front bush was 1.6 millimeters. After replacing the camshaft front and rear bushings, the valve clearance adjustment is normal. Why camshaft bush wear valve clearance always adjust it? Because the valve in the open position. Due to the valve (?) Shaft pressure,