排气管冒浓烟是大发微型汽车发动机存在的一个较为突出的问题。严重时排气管向外淌机油,发动机功率下降,润滑油耗量增加。形成这一问题的主要原因有以下2个方面。第一,大发微型汽车发动机的安装倾角较大,发动机在工作过程中,活塞在自身重力作用下,易紧贴气缸壁的一侧运动,而使活塞另一侧与气缸壁之间的间隙差值增大,尤其当活塞与气缸壁磨损达一定程度时,其间隙差值更为明显。由于该型发动机的压缩比较大,进气行程气缸内的真空度较高,这就增加了气缸窜油的可能性。第二,气门杆、气门导管因磨损过甚 Exhaust pipe to take smoke is Daihatsu mini car engine exists a more prominent problem. Exhaust pipe to severe drip oil, engine power decline, increased fuel consumption. The main reasons for the formation of this problem are the following two aspects. First, Daihatsu mini-car engines installed larger angle, the engine in the work process, the piston in its own gravity, easy to move close to the side of the cylinder wall, leaving the piston on the other side of the gap between the cylinder wall The difference increases, especially when the piston and cylinder wall wear up to a certain extent, the gap difference is more obvious. Because of this type of engine compression is relatively large, high degree of vacuum within the intake stroke cylinder, which increases the possibility of cylinder oil. Second, the valve stem, valve guide due to wear too