我单位多台配装柴油机的SDG3210型解放牌自卸汽车,用于工地拉沙石料,使用中频繁出现了从膨胀水箱向外泛水的现象。该故障多发生在柴油机从高速突然转入低速或停止运转时,表现为从膨胀水箱加水口处向外大量喷水,有点像水散热器“开锅”时的喷水现象,不同的是泛水没有大量的水蒸气。仔细观察发现,在柴油机低速运转时,膨胀 SDG3210 Jiefang brand dump trucks equipped with diesel engines of our unit are used for the construction of lasagna stones, and the phenomenon that water is flooded outward from the expansion tank frequently occurs frequently in use. The failure occurred in the sudden transition from high-speed diesel engine to a low speed or stop running, the performance of water from the expansion tank outward a lot of water jet, a bit like a water radiator “open pot ” water spray phenomenon, the difference is Pan-water does not have a lot of water vapor. Careful observation found that the diesel engine at low speed, expansion