有时候车子出现了怠速异常的现象、转速忽高忽低,去到保养厂的时候听技师说:你的车子漏真空了或真空管破了之类的话,到底真空是指什么?我先来说明一下“真空”是从何而来,而引擎各部会用得到真空的组件又有哪些。往复式引擎在进气行程、活塞下行时,会吸入混合气,而如果是怠速运转的状况下,节气门是处于完全关闭的状态,所以从节气门那端到进气歧管这一段,会在那个时候产生一个相当大的真空状态。 Sometimes the car appeared idling abnormalities, the speed fluctuated, went to the maintenance plant when listening to the technician said: your car leak vacuum or broken vacuum tube and the like, in the end what is the vacuum? I will first explain What “vacuum” is coming from, and what are the components that the various parts of the engine will use to get the vacuum? Reciprocating engine in the intake stroke, the piston down, it will inhale the mixture, and if it is idle condition, the throttle is in a fully closed state, so from the end of the throttle to the intake manifold section, will At that time a considerable vacuum was created.