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本文从五个方面阐述了内燃机(主要指汽油机)未燃烃的生成机理及运行条件对烃的排放影响。1 未燃烃的危害简单陈述了未燃烃对人休及动植物的危害。2 未燃烃的生成机理从传统的观点叙述了内燃机中未燃烃的生成机理,着重强调气缸壁的激冷作用。认为当火焰传到气缸壁附近时,由于气缸壁的冷却作用使已经生成的链载体受到破坏,链反应减慢以至中止,从而使燃烧中止。这样,在气缸壁壁面留下0.05～0.38mm厚的部分反应的中间
This article elaborates the formation mechanism of unburned hydrocarbons of internal combustion engines (mainly gasoline engines) and the impact of operating conditions on the emission of hydrocarbons from five aspects. 1 unburned hydrocarbon hazard simply stated the unburned hydrocarbon on human and animal and plant hazards. 2 Unburned hydrocarbon generation mechanism From the traditional point of view described in the internal combustion engine unburned hydrocarbon generation mechanism, with emphasis on the cylinder wall chilling effect. It is considered that when the flame spreads near the cylinder wall, the already formed chain carrier is destroyed due to the cooling effect of the cylinder wall, and the chain reaction is slowed down and stopped, so that the combustion is stopped. In this way, left in the cylinder wall wall 0.05 ~ 0.38mm thick part of the middle of the reaction