【摘要】 车用内燃机通常是用万有特性分析内燃机各种工况下的性能 ,传统的制取万有特性的方法工作量大 ,而且易于产生人为的误差。本文利用MATLAB语言强大的数据处理和三维曲线绘图功能 ,运用等值线法 ,提出了一种新的绘制内燃机万有特性的新方法 ,即绘制出由转速、负荷、比油耗构成的三维曲面 ,利用等值线法绘出等油耗线。该方法简单易行 ,物理意义明确直观更多还原

【Abstract】 The universal charateristic is always used to analyse an engine’s performance.It is very complex to draw a universal charateristic curve with the traditional mathod and it is easy to make mistakes in the process.By using contour plot method with MATLAB’s high performance on singal processing and 3 D graphics drawing,a new method to draw the universal charateristic curve of an internal combustion engine is introduced in the paper.更多还原