作　　者： (焦运景）; (冯伟娜）; (臧继嵩）;

机构地区： 北华航天工业学院,河北廊坊065000

出　　处： 《小型内燃机与车辆技术》 2017年第4期46-49,共4页

摘　　要： 首先应用最小二乘法原理,结合MATLAB工程计算语言,建立了发动机速度特性及万有特性的数学模型;针对某4缸柴油机的实测试验数据,应用数学模型拟合绘制了发动机的速度特性和万有特性曲线,最终得出较为精确可靠的曲线方程和直观的曲线曲面拟合。通过使用该方法,可以使绘制精确度更高,拟合发动机特性曲线更好。 Combined with MATLAB engineering calculation language, the principle of least square method was applied to establish a mathematical model of the engine speed characteristic and universal characteristics. According to the test data of a four cylinder diesel engine, the mathematic model was used to fit and draw velocity and universal characteristic curve of the engine. Finally, the curve equation which is accurate and reliable and intuitive curve surface fitting were obtained.By using this method, the engine characteristic curve which is more accuracy and better fitting can be drawn.

关 键 词： 发动机特性曲线 最小二乘法 数据处理