前不久接修一台四缸汽油机,驾驶员反映接连三次活塞环粘结在檀内,在第三次换环时,抽出活塞,发现活塞非受力面裙部被烧坏。它为何不烧顶部而要烧裙部呢?经检查缸套失圆0.20毫米,其他正常。由于气缸失圆,必然造成活塞环漏气,尤其是新活塞环,因高温的燃烧气体,从活塞环和气缸的漏气 Not long ago to take over a four-cylinder gasoline engine, the driver reflected three consecutive piston ring bonded in the Tan, the third ring, the piston was removed and found that the piston non-stress surface skirt was burned. Why does it not burn the top and burn the skirt? After checking the cylinder liner lost 0.20 mm, the other normal. As the cylinder out of round, inevitably cause piston ring leakage, especially the new piston ring, due to high temperature combustion gases, piston rings and cylinder leakage