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本文以测定汽油机几种工况的燃烧室压力变化为基础,研究了隔热内冷汽油机对燃烧过程、传热损失及有效效率的影响.测定分析表明,与常规发动机相比燃烧过程的滞燃期缩短,压力升高率与最大燃烧压力升高,燃烧持续期缩短,而最高燃烧温度基本不变.理论计算分析表明,燃烧宣传热损失减少8%,机械效率提高2.3～2.4%,有效效率提高6.0～6.9%.
In this paper, based on the determination of pressure changes of combustion chamber under several operating conditions of gasoline engine, the influence of heat-insulating internal cooling gasoline engine on combustion process, heat transfer loss and effective efficiency is studied. The analysis shows that the combustion process is more stable than conventional engine The shortening of the period, the increase of the pressure and the increase of the maximum combustion pressure, the shortening of the combustion duration, and the maximum combustion temperature were basically unchanged.The theoretical calculation and analysis showed that the heat loss of combustion propaganda decreased by 8% and the mechanical efficiency increased by 2.3-2.4% Increase by 6.0 ~ 6.9%.