[1]王利民,等.基于虚拟标定技术研究柴油机燃油消耗率和NOx 排放的鲁棒性[J].内燃机学报,2020,(05):450-456.[doi:10.16236/j.cnki.nrjxb.202005058]
　Wang Limin,He Guanzhang,et al.Investigation on the Robustness of Fuel Consumption and NOx Emissions of a Diesel Engine Based on Virtual Calibration Technology[J].,2020,(05):450-456.[doi:10.16236/j.cnki.nrjxb.202005058]
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基于虚拟标定技术研究柴油机燃油消耗率和NOx 排放的鲁棒性
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《内燃机学报》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2020年05
页码:
450-456
栏目:
出版日期:
2020-09-25

文章信息/Info

Title:
Investigation on the Robustness of Fuel Consumption and NOx Emissions of a Diesel Engine Based on Virtual Calibration Technology
作者:
王利民1;  2; 何冠璋2; 王 辉2; 李明星2; 王天友1
(1. 天津大学 内燃机燃烧学国家重点实验室，天津 300072；2. 广西玉柴机器股份有限公司，广西 玉林 537005)
Author(s):
Wang Limin1;  2; He Guanzhang2; Wang Hui2; Li Mingxing2; Wang Tianyou1
(1. State Key Laboratory of Engines，Tianjin University，Tianjin 300072，China；2. Guangxi Yuchai Machinery Company Limited，Yulin 537005，China)
关键词:
柴油机; 虚拟标定; 文丘里管; 废气旁通阀
Keywords:
diesel engine; virtual calibration; Venturi; exhaust gas bypass valve
分类号:
TK427
DOI:
10.16236/j.cnki.nrjxb.202005058
文献标志码:
A
摘要:
在虚拟标定台架上进行了涡轮增压器废气旁通阀门开启特性和文丘里管压差信号偏移对柴油机燃油消耗率和氮氧化物排放影响的研究，揭示了上述两种因素分别作用下的发动机性能排放的鲁棒性．结果表明：大负荷工况下，废气旁通阀门开启特性正向偏移使泵气损失增大，燃油消耗率显著恶化，在偏移量为10 kPa 时，全球统一重型发动机瞬态试验循环(WHTC)平均燃油消耗率相比标准状态升高0.68%；文丘里管压差信号偏移导致实际再循环废气流量变化，发动机原机(不加装后处理系统)氮氧排放变化显著．压差信号偏移量与瞬态测试循环平均燃油消耗率与氮氧排放呈线性变化规律，其中燃油消耗率变化随偏移量正向增大而降低，在偏移量为4 kPa 时燃油消耗率相比标准状态降低0.23%；氮氧化物排放与压差信号偏移量呈线性正相关关系，偏移量为4 kPa 时循环平均氮氧化物排放升高8.61%．
Abstract:
The influences of venture pressure difference signal variation and turbocharger waste gate opening variation on the fuel consumption and NOx emissions of a diesel engine were investigated on a virtual calibration bench. The results show that the brake fuel consumption increases significantly when the waste gate opening shifts towards higher pressure due to obvious increment of pumping loss at high engine load. Average fuel consumption is 0.68% higher than that of standard condition. Mass flow of the recirculated exhaust gas varies when the Venturi pressure difference signal changes，which leads to obvious variation of engine-out NOx emissions. Linear changing rule is observed between the brake fuel consumption，engine-out NOx and the pressure difference signal. Average fuel consumption during the world harmonized transient cycle(WHTC)tests decreases with the positive shift of the pressure difference signal. The fuel consumption decreases by 0.23% when the offset is 4 kPa，while engine-out NOx increases by 8.61% at the same time.

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更新日期/Last Update: 2020-09-25