发动机转矩特性分析及相关图形的修正  

Analysis of Engine Torque Characteristics and the Revision of some Related Graphics

作　　者：廖林清[1] 柯晶晶[2] 谢明[2] 符亮[2] 

机构地区：[1]重庆理工大学 汽车零部件制造及检测技术教育部重点实验室 [2]重庆理工大学 重庆汽车学院,重庆400054

出　　处：《重庆理工大学学报（自然科学）》2012年第3期8-11,50,共5页Journal of Chongqing University of Technology：Natural Science

基　　金：重庆市教委科学技术研究项目(KJ080619)

摘　　要：研究了汽油发动机外特性和部分负荷特性下的转矩曲线。对某发动机的试验数据进行整理,利用拟合插值的方法绘制出外特性及部分负荷特性下的转矩曲线,修正了汽车驱动力图、驱动力-行驶阻力平横图、加速度图和爬坡度图。分析了发动机输出与负载转矩特性,提出了转矩特性曲线上最大转矩点左端是非稳定工作区的观点,从而对已有的理论知识进行了补充,对实际驾驶中出现的现象进行了解释。The external characteristics and part load characteristics of petrol engine are studied in this paper. Take a particular engine test data as an example. Torque curves under external characteristics and part load characteristics are obtained by the use of calculation software. Fitting and interpolation are applied in the process. Related parameters are calculated according to the theory formula, and then the figure of car driving force and acceleration and other relative figures are revised through soft- ware. Especially, the engine output and load torque characteristics are deeply analyzed, and a new viewpoint has been given based on the analysis. In the curve of torque characteristic, the left section of the maximum torque is an unsteady work area. The conclusion replenishes the existing automobile theory and some actual operations are also explained in this paper, which can provide useful reference for the related research.

关 键 词：转矩特性 曲线拟合 图形修正 工况分析 

分 类 号：U464.171[机械工程—车辆工程]