基于火焰传播过程建立了火花点火发动机顶环岸间隙处未燃碳氢生成和释放过程的数学模型，并利用模型进行了顶环岸间隙处未燃碳氢生成过程的数值模拟计算。计算结果表明：当汽油机燃用稀混合气、采用低压缩比、适当推迟点火提前角以及采用边缘布置火花塞等均可有效地降低顶环岸间隙内未燃碳氢的生成量，达到降低未燃碳氢排放的目的。 Based on the flame propagation process, a mathematic model of unburned hydrocarbon generation and release at the spark gap of the spark ignition engine was built. The model was used to simulate the unburned hydrocarbon generation process at the top land bank. The results show that when the gasoline engine is lean, the low compression ratio, the appropriate ignition delay advance angle and the edge-mounted spark plugs can effectively reduce the unburned hydrocarbon generation in the top land bank gap and reduce the unburned hydrocarbon The purpose of hydrocarbon emissions.