为了由喷油过程曲线预算直喷式柴油机燃烧放热规律,文中介绍了建立一种无因次的计算模型、计算方法和计算公式,并对计算和试验结果作了评价。试验结果与计算结果良好吻合,这表明利用该模型可以减少许多试验,因而可以节省大量试验费用。该计算方法新颖,具有实用价值。 In order to predict the combustion heat release of direct injection diesel engine from the injection process curve, a dimensionless calculation model, calculation method and calculation formula are introduced in this paper. The calculation and test results are also evaluated. The experimental results are in good agreement with the calculated results, which shows that many experiments can be reduced by using this model, which can save a lot of test costs. The calculation method is novel and has practical value.