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一辆维修后的解放 CA1092型载货汽车,行驶时尾气中有蓝烟。一般冒蓝烟是发动机燃烧机油所致,而机油又是怎样进入燃烧室的呢?为此,我们首先检查了发动机加机油管口,无异常情况。接着又排除了不是因活塞与缸壁间隙过大、活塞环不密封而造成窜机油现象。后经进一步检查,确认是气门导管油封(气门挡油罩)龟裂破损所致。当发动机在进气行程中,活塞上方的容积增大,气
After a maintenance liberation of CA1092 truck, driving the exhaust in the blue smoke. The general blue smoke is caused by engine combustion oil, and oil is how to enter the combustion chamber? To do this, we first check the engine plus oil nozzle, no abnormalities. Then ruled out not because the piston and cylinder wall clearance is too large, the piston ring is not sealed and cause channeling oil phenomenon. After further examination, confirmed that the valve guide oil seal (valve cover) crack damage caused. When the engine in the intake stroke, the piston above the volume increases, gas