内燃机工程2024，Vol.45Issue(2)：54-63,74,11.DOI:10.13949/j.cnki.nrjgc.2024.02.007
燃烧系统参数对商用车发动机燃烧和排放特性的影响研究
Research on the Influence of Combustion System Parameters on the Combustion and Emission Characteristics of Commercial Vehicle Engines
摘要
Abstract
In order to improve the performance of commercial vehicle engines,four new schemes were designed for the structural parameters of the combustion chamber of a commercial vehicle by using computational fluid dynamics(CFD)simulation,orthogonal design,and other methods.Three injection parameters,including oil beam angle,the angle of the spray cone and main spray timing,were selected to carry out a multi-factor impact study.The results show that scheme 1,where the shape curve of the combustion chamber contracts inward and the maximum radius increases,can enhance the turbulent characteristics in the cylinder,improve the distribution of fuel concentration,accelerate combustion speed,and achieve better fuel gas mixing,making it the optimal scheme.In the research of fuel injection parameters,when the soot emission is taken as the optimization index,the oil beam angle has the greatest impact on the emission characteristics.The optimal matching scheme is that the oil beam angle is 147°,the angle of the spray cone is 15°,and main spray timing is-1°.Its in-cylinder soot emissions are 13.91%lower than those of the original engine,and NOx emissions are 13.98%lower than those of the original engine.When the NOx emission is taken as the optimization index,the main spray timing has the greatest impact on the emission characteristics.The optimal matching scheme is that the oil beam angle is 160°,the angle of the spray cone is 25°,and the main spray timing is-1°.The NOx emissions in the cylinder are 37.79%lower than that of the original engine.关键词
商用车/燃烧系统/燃烧室/喷油参数/燃烧特性/排放特性Key words
commercial vehicle/combustion system/combustion chamber/fuel injection parameter/combustion characteristic/emission characteristic分类
能源科技引用本文复制引用
雷基林,李臻卓,刘懿,王伟超,宋国富,张海丰..燃烧系统参数对商用车发动机燃烧和排放特性的影响研究[J].内燃机工程,2024,45(2):54-63,74,11.基金项目
云南省科技厅重大科技专项项目(202102AC080004) Yunnan Provincial Science and Technology Plan Project(202102AC080004) （202102AC080004）
