一辆 EQ1091货车发动机有如下4种现象:(1)单缸断火时,声音减弱或消失。(2)发动机在怠速运转时发出“当、当、当”的清脆声音,温度升高后声音也就随着减弱或消失。(3)此声音是有节奏的,把机油加注口的盖打开,有冒蓝烟的现象,排气管也冒蓝烟。(4)卸下第6缸火花塞,倒入少许机油,发动机声音有明显变化。产生这种现象的原因是什么呢?(1)活塞与气缸 An EQ1091 truck engine has the following 4 kinds of phenomena: (1) single cylinder off, the sound weakened or disappeared. (2) When the engine emits a crisp sound of “when, when, when” at idle, the sound will diminish or disappear as the temperature rises. (3) The sound is rhythmic, the lid of the oil filler opening, the phenomenon of blue smoke, the exhaust pipe also take the blue smoke. (4) Remove the 6 cylinder spark plug, pour a little oil, the engine sound has changed significantly. What causes this phenomenon? (1) Pistons and cylinders