一种柴油机瞬态NOx估算模型

熊兴旺; 于津涛; 高俊华; 张乐乐; 尚玉磊

doi:10.3969/j.issn.1001-2222.2018.05.011

车用发动机 ›› 2018, Vol. 0 ›› Issue (5) : 61-64. DOI: 10.3969/j.issn.1001-2222.2018.05.011

栏目

一种柴油机瞬态NO_x估算模型

熊兴旺¹，于津涛¹，高俊华¹，张乐乐²，尚玉磊²

作者信息 +

Model for Estimating Transient NO_x of Diesel Engine

XIONG Xingwang¹,YU Jintao¹,GAO Junhua¹,ZHANG Lele²,SHANG Yulei²

Author information +

文章历史 +

摘要

在一台国五柴油机上，进行了原机ETC循环试验和200 s怠速试验。ETC试验结果表明：怠速工况和非怠速工况的NO_x体积分数与过量空气系数之间可分别拟合为幂律型关系式；200 s怠速试验中，NO_x体积分数估算值与试验值之间的相对误差，在0—30 s内逐渐减小，在30—170 s内逐渐增大，170—200 s内基本不变。利用拟合的经验公式构建瞬态NO_x估算模型，ETC 循环全过程验证结果表明：NO_x体积分数和质量流量的估算值与试验值总体吻合较好，但在峰值处误差明显；循环累计质量估算值比试验值大4.6%。

Abstract

ETC test and 200 s idle test were conducted on a China Ⅴ diesel engine. According to the ETC test results, the relationship between NO_x volume fraction and excess air ratio at idle and nonidle conditions could be expressed as power formula. For the 200 s idle test, the relative error between estimated values and test values of NO_x volume fraction gradually decreased within 0—30 s, increased within 30—170 s and remains nearly unchanged within 170—200 s. With the transient NO_x estimation model built by the fitted empirical formulas, the NO_x emissions of ETC cycle were verified. The results show that estimated values of NO_x volume fraction and mass flow agree well with test values, but the difference at the peak is obvious. In addition, estimated value of NO_x cycle cumulative mass is 4.6% higher than test value.

导出引用

熊兴旺，于津涛，高俊华，张乐乐，尚玉磊. 一种柴油机瞬态NO_x估算模型[J]. 车用发动机. 2018, 0(5): 61-64 https://doi.org/10.3969/j.issn.1001-2222.2018.05.011

XIONG Xingwang,YU Jintao,GAO Junhua,ZHANG Lele,SHANG Yulei. Model for Estimating Transient NO_x of Diesel Engine[J]. Vehicle Engine. 2018, 0(5): 61-64 https://doi.org/10.3969/j.issn.1001-2222.2018.05.011