目前汽车上应用的是汽油和柴油发动机.汽油发动机仍然是最受欢迎的.汽油发动机是四冲程,火花点火式发动机,可以通过液体冷却或空气冷却.
发动机内的燃烧过程必须有适合空气和燃料的混合物.空气和燃料的混合物必须在正确的时间点火.
汽车发动机通常是四冲程发动机.即有进气,压缩,膨胀和排气冲程.汽油发动机的进气冲程带入新鲜的空气和燃料.压缩冲程使空气和燃料的混合物压缩.当混合物由火花塞点燃时,膨胀冲程开启.膨胀的气体推动活塞顶部向下运动产生动力冲程.当活塞再度向上,废气随之别挤出发动机,即排气冲程.
英语翻译The gasoline and diesel engine are the ones used in the
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