基于MATLAB的柴油机气缸直径和活塞行程优化设计

Optimal Design of Cylinder Diameter and Stroke of Diesel Engine

气缸直径和活塞行程是柴油机的重要结构参数,其活塞行程与气缸直径的比值直接影响柴油机的热负荷与散热面积。因此柴油机设计过程中以最小散热面积为目标函数,建立活塞行程与气缸直径的比值为变量的优化设计数学模型;利用MATLAB优化工具箱,求解出最优的活塞行程和气缸直径。本文以R180柴油机为例说明基于MATLAB的柴油机气缸直径和活塞行程的优化设计的方法。

Diameter of the cylinder and piston stroke is one of the important structural parameters of diesel engine. The piston stroke and the ratio of the diameter of the cylinder directly affect the heat load of diesel engine and the cooling area.So in the process of diesel engine design, with the minimum heat dissipation ar- ea as the objective function, we should establish the ratio of piston stroke and the cylinder diameter mathe- matical model for optimal design of variable,and use the MATLAB optimization toolbox to solve the opti- mal piston stroke and the cylinder diameter.Taking R180 diesel engine as an example,this paper illustrates the optimal design of the cylinder diameter based on MATLAB and piston stroke of diesel engine.