活塞环的开口不能正对活塞销孔,也不能正对活塞销的垂直方向,以免刮伤缸壁;同时开口位置要错开,以保证密封。在175、195等型号柴油机上,四根缸盖螺栓的位置正好与活塞销孔和活塞销的垂直方向成45°。因此,在安装活塞环时,175型柴油机的四根气环和一根油环的开口位置可分别对准四根缸盖螺栓(图1);195型柴油机的三根气环和两根油环的开口位置可分别对准四根缸盖螺栓(图2)。用这种方法安装活塞环,简单易行。 Piston ring openings can not be positive on the piston pin hole, it can not face the vertical direction of the piston pin, so as not to scratch the cylinder wall; at the same time to open the wrong position to ensure that the seal. On the 175,195 and other diesel engines, the four cylinder head bolts position exactly 45 ° to the vertical axis of the piston pin bore and piston pin. Therefore, the installation of piston rings, 175 diesel engine four gas rings and an oil ring opening position can be aligned four cylinder head bolts (Figure 1); 195 diesel engine three gas rings and two oil rings Of the opening position can be aligned four cylinder head bolts (Figure 2). Piston rings installed in this way, simple and easy.