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。
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.
二冲程发动机没有移动的阀，火花塞每次点火活塞到达循环顶端。
A two-stroke engine has no moving valves, and the spark plug fires each time the piston hits the top of its cycle.
点火包包含个人线圈，线圈被直接安装到火花塞和被放于墨盒里，位于发动机的凸轮轴之间。
The ignition pack consists of individual coils that are mounted directly onto the spark plugs and are housed in a 'cartridge' , located between the engine's camshafts.
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