摘要
采用一种基于MATLAB软件的自适应查表优化方法,优化VVT发动机充气效率的标定数据。通过对充气效率计算公式V=a+bx+cx2的常数项a、一次项系数b和二次项系数c标定数据的优化,使发动机的充气效率标定数据更加平顺,相邻各点之间没有出现较大的波动,优化前后的主要数据偏差没有超过5%,符合工程应用要求。
The smoothness and accuracy of volumetric efficiency calibration data for VVT engine affect the engine air - fuel ratio control accuracy. Thereby , they affect the performance of vehicle emissions, vehicle drivability and fuel economy. In this paper, the volumetric efficiency of the calibration data is ptimized by using adaptive look - up table method with MATLAB software. Optimize Volumetric efficiency formula V = a ＋ bx ＋ cx^2, Constant a, coefficient b and the quadratic coefficient c are optimized. The engine volumetric efficiency calibration data are smoother, there is no great fluctuation between adjacent points. Before and after optimization, the main data deviation does not exceed 5%, which meets engineering application requirement.
出处
《西华大学学报（自然科学版）》
CAS
2012年第6期34-38,共5页
Journal of Xihua University:Natural Science Edition
关键词
充气效率
自适应查表
MATLAB
平顺性
标定
volumetric efficiency
adaptive look - up table
MATLAB
smooth
calibration
