卢瑞军，苏茂辉，蔡文远，田文凯，陈海兰

（浙江吉利控股集团有限公司，浙江 杭州 311000）

    摘要：本文应用AVL Boost软件对CNG发动机进行仿真优化计算，分析点火提前角、压缩比、配气正时和EGR率对缸内热负荷的影响，仿真分析结果表明，点火提前角和EGR率对缸内热负荷影响较大，压缩比和配气正时对热负荷影响较小。发动机进行台架试验验证，各项指标达到了设计目标。

    关键词：缸内热负荷，点火提前角，压缩比，配气正时，EGR率

    Abstract: In this paper, AVL Boost software is used for simulation CNG engine, analysis the factors which impact the in-cylinder thermal load such as ignition advance angle, compression ratio, valve timing and EGR rate. Simulation results show that the ignition advance angle and EGR rate have a major impact on in-cylinder thermal load, while the compression ratio and valve timing have minor effects on thermal load. Finally, by engine bench validation, engine performance to meet the design goals.

    Keywords: Cylinder Thermal Load;Ignition Advance Angle;Compression Ratio;Valve Timing; EGR Rate