论文部分内容阅读
给出了火花点火式发动机排气氧传感器(EGO)输出信号的实验结果。实验中采用V6、3.8 L、BUICK发动机且每个气缸中安装有一个氧传感器,以研究影响发动机消耗燃料的因素。应用LabView数据采集装置记录单个气缸废气以及主流尾气氧传感器的输出电压信号。对来自6个气缸变量的平均值采用统计的方法进行处理后,并与主流的EGO电压进行比较,确定了产生系统误差的因素。对左右两侧气缸信号平均值的差别进行比较发现,采用此种排气管结构的气缸中空气—燃料混合气平均值存在一些明显差别。根据数据和图表解释了统计的结果。研究表明,V字形排列的发动机两侧的气缸的空气和燃料混合气是不同的;在低速、高负荷和高辛烷燃料的情况下,右侧气缸具有比较稀的混合气;而在某些情况下两侧气缸具有相同的混合气。基于统计估计的方法,提出了一个可以用于估计V字形排列发动机左右两侧气缸中空气—燃料混合气的简单模型。此方法还可以应用于分析进气管和排气管的缺陷。
The experimental results of the spark ignition engine exhaust oxygen sensor (EGO) output signal are given. In the experiment, V6, 3.8L, BUICK engines were used and each cylinder was equipped with an oxygen sensor to study the factors that affected the engine fuel consumption. The LabView data acquisition device is used to record the output voltage of a single cylinder exhaust and the main exhaust gas oxygen sensor. The average of six cylinder variables was statistically processed and compared with the prevailing EGO voltage to determine the factors that caused systematic errors. A comparison of the differences in the average of the left and right cylinder signals reveals that there are some significant differences between the average values of the air-fuel mixture in cylinders using such an exhaust pipe structure. According to the data and charts to explain the statistical results. Studies have shown that the air and fuel mixture of the cylinders on both sides of a V-shaped arrangement are different; in the case of low speed, high load and high octane fuel, the right cylinder has a leaner mixture; while in some In both cases, the cylinders on both sides have the same mixture. Based on the method of statistical estimation, a simple model that can be used to estimate the air-fuel mixture in the V-shaped cylinders on both the left and right sides of the engine is proposed. This method can also be applied to analyze the intake and exhaust pipe defects.