许多用户及修理厂希望减少4125发动机活塞与缸套的配合间隙,以增加气缸压缩压力、改善燃烧条件、提高发动机功率、降低油耗、延长使用寿命。我厂为什么不更改现行活塞与缸套配合间隙标准,即减少配合间隙进行装车呢? 一、理论分组和实际分组配合间隙的误差按国家标准规定:缸套以内孔最小尺寸分组,活塞按裙部外圆最大尺寸分组,每组公差0.02毫米(见下表),活 Many users and repair shops hope to reduce the engagement clearance of 4125 engine pistons and cylinder liners to increase cylinder compression pressure, improve combustion conditions, increase engine power, reduce fuel consumption and extend service life. Why do I not change the factory with the current piston and cylinder liner with the gap standard, that is, reduce the gap with the loading it? First, the theoretical grouping and the actual grouping gap error according to national standards: cylinder liner with the smallest size grouping, The maximum size of the outer circle group, each group tolerance of 0.02 mm (see table below), live