Gasoline engines have spark plugs that help in the ignition of the air fuel mixture.

汽油发动机有火花塞，有助于点燃空气燃料混合物。

Diesel engines have glow plugs that heat up the air fuel mixture, and combustion is achieved by compression.

柴油发动机有加热空气燃料混合物的发光塞，燃烧是通过压缩来实现的。