In a diesel engine, there is no spark plug. Instead, diesel fuel is injected into the cylinder, and the heat and pressure of the compression stroke cause the fuel to ignite.
柴油发动机内没有火花塞，取而代之的是将柴油喷入发动机气缸，然后压缩冲程在高温高压下引起燃料点火。
2
The heat produced by car ignition climbs up through cylinder walls and will then be absorbed by the radiator coolant.
汽车的点火装置所产生的热量的爬上通过气缸壁的吸收，然后冷却。
3
This heat can usually be recovered from the ambient air surrounding the cylinder.