递进优化技术在汽油机工作过程优化计算中的应用

采用数学规化的方法优化汽油机的工作过程,可以在限制发动机热负荷、机械负荷、氧化氮排放和不爆震的条件下,使发动机在运行过程中经济性最好.但是要求得比较精确的优化解,一般要进行大量计算,花费较多机时.本文提出了一种分段、分层、分级的递进优化方法,应用于汽油机工作过程的优化计算中,取得了较好的效果.

The Application of Progressive OptimumTechnique for Optimization of SI EngineThermodynamic Processes

Optimization of SI engine thermodynamic processes by mathematical programming method is able to make engine operate most economically under the circumstances of limited heat load,mechanical load,nitric oxide emission and knock. But it requires many iterations to obtained stable solution for given accuracy and a number of computing time will be spend. A segmented, layered and graded progressive optimization technique is introduced for the calculation in this paper and satisfying results are achieved.