发动机在实际使用过程中造成燃油增耗的因素固然很多,但活塞环的影响不可低估,由于老式活塞环磨损大,弹性消失快,使摩擦副间隙增大,从而引起燃烧恶化油耗增高、动力性能和经济性能下降。 目前新型活塞环组为三片(二平一油)第一、二道压缩平环分为镀铬桶面、锥面环取代过去的截面矩形老式环、油环由现在的一片铸铁内撑螺旋镀 However, the influence of piston ring can not be underestimated. Due to the large wear of old-style piston ring and the rapid disappearance of elasticity, the clearance of friction pair increases, which leads to the increase of fuel consumption due to deterioration of combustion. The dynamic performance And economic performance is declining. At present, the new piston ring group is three (two flat and one oil) first and second compression flat ring is divided into chrome-plated barrel surface, tapered ring ring to replace the previous section of the rectangular ring, the oil ring from the current cast iron spiral screw