论文部分内容阅读
11.F6L912/913柴油机活塞顶隙是多少?怎样调整? 答:F6L912/913柴油机活塞顶隙的装配技术要求为1.0～1.2毫米。对同一台柴油机要求各缸活塞顶隙尽量一致。活塞顶隙过小,当柴油机温度升高后,由于机件热变形,可能引起气门撞活塞事故;如果活塞顶隙过大,则压缩比减小,不易起动,功率下降。活塞顶隙是指活塞到达上止点位置时。活塞顶面和缸盖底平面间的距离。一般在安装缸盖时要测量活塞顶隙,可用直径为φ2毫米的铅丝,从喷油器孔置入活塞顶上,然后转动曲轴过上止点,取出压缩后的铅丝,测得的最薄尺寸,即为活塞顶隙。活塞顶隙过小,可在缸套下部套
11.F6L912 / 913 Diesel engine piston top clearance is how much? How to adjust? A: F6L912 / 913 diesel piston head clearance assembly technology requirements for the 1.0 ~ 1.2 mm. On the same diesel engine requires that the cylinder piston top clearance as much as possible. Piston top clearance is too small, when the diesel engine temperature, due to mechanical deformation, may cause the valve hit the piston accident; if the piston is too large, the compression ratio is reduced, not easy to start, the power down. Piston top clearance refers to the piston reaches the top dead center position. The distance between the top of the piston and the bottom of the cylinder head. To measure the piston top clearance when the cylinder head is installed, the lead wire with the diameter of φ2mm can be used to place the top of the piston from the injector hole, and then turn the crankshaft to over the top dead center to remove the compressed lead wire. The thinnest measured Size, is the piston top clearance. Piston tip clearance is too small, can be set in the lower part of the cylinder liner