一辆东风EQ140汽车在大修竣工后试车,发动机运转大约两小时后,便慢慢地熄火,运转中排气管有大量蓝烟冒出。拆下火花塞一看,只见上面有一层厚厚的机油积碳,说明有大量机油进入燃烧室内。 首先怀疑是活塞环装反了或气缸、活塞、活塞环三者配合不当而导致机油窜入燃烧室。拆下气缸盖取出活塞,检查活塞环均正确安装。检 A Dongfeng EQ140 car overhauled after completion of the test run, the engine running about two hours later, it will slowly turn off the exhaust pipe running a large number of blue smoke. Remove the spark plug and saw that I saw above a thick layer of engine oil coke, indicating a large number of oil into the combustion chamber. First suspected that the piston ring mounted anti-cylinder or cylinder, piston, piston ring with the improper three lead to the oil fleeing into the combustion chamber. Remove the cylinder head Remove the piston, check the piston ring are installed correctly. Check