基于整车性能的汽车传动系参数的优化设计

Optimization design of automobile powertrain parameter based on comprehensive vehicle performance

在建立发动机特性数学模型的基础上,以原地起步连续换挡加速时间、多工况循环行驶油耗和多工况汽车尾气污染物排放量作为衡量动力性、经济性和排放性能的3个分目标,采用线性组合的方法将其转换成单一目标函数,建立传动系优化数学模型,利用复合形法对此模型进行优化。实例结果表明,应用此法对汽车传动系参数进行设计,整车综合性能均有显著改善。

On the basis of engine particularity mathematical model, using the origin underway accelerate time、 the oil consumption and emission at the cycle of muti-working condition as the objective functions of the power performance, the economy performance and emission performance respectively ,and then transform it to a single objective function by using the linear adding. Establishing the optimization mathematical model of powertrain, and optimizing this model by complex algorithm. A calculation example shows that optimization of the powertrain pantmeter utilizing this method, the comprehensive performance of the automobile han been remarkably promoted.