所谓积炭,是发动机工作过程中,在燃烧室和气缸的内壁以及燃烧室内零件表面形成的一层沉积物。沉积物的成分随燃料和润滑油(包括添加剂)的成分和化学结构不同而变化很大(例如使用非乙基汽油时,在燃烧室中形成的沉积物主要是碳;使用乙基汽油时,主要成分为铅化物,碳所占的比例仅为10％左右),也和发动 The so-called coke, is the engine working process, the combustion chamber and the cylinder wall and the combustion chamber surface of the formation of a layer of sediment. The composition of the deposit varies greatly with the composition and chemical structure of the fuel and lubricating oil (including additives) (for example, when using non-ethyl gasoline, the deposit formed in the combustion chamber is predominantly carbon; with ethyl gasoline, The main component of lead compounds, the proportion of carbon is only about 10%), but also to start