内燃机工程2025，Vol.46Issue(5)：19-27,9.DOI:10.13949/j.cnki.nrjgc.2025.05.003
增压预燃室点火式汽油机稀薄燃烧及排放特性
Lean Combustion and Emission Characteristics of a Turbocharged Pre-Chamber Ignition Gasoline Engine
摘要
Abstract
To validate the potential application of passive pre-chamber technology in commercial gasoline direct injection(GDI)engines,a three-stage injection strategy was employed to investigate the thermal efficiency,combustion characteristics(crank angle corresponding to 50%cumulative heat release,knock index,and coefficient of variation),and emission characteristics of pre-chamber ignition engines in a boosted lean-burn environment.A three-dimensional simulation model was established to simulate the combustion and emission processes under different operating conditions.The results show that under high-load conditions,the average knock index could be controlled between 0.20 and 0.34 MPa,and the coefficient of variation could be maintained between 3.0%and 3.5%.Within the load range of(indicated mean effective pressure,IMEP)from 1.0 MPa to 1.4 MPa,all the indicated thermal efficiencies exceeded 40%.As the load increased,nitrogen oxides decreased,while hydrocarbon and carbon monoxide emissions slightly increased.关键词
被动预燃室/汽油机/稀薄燃烧/仿真Key words
passive pre-chamber/gasoline engine/lean-burn combustion/simulation分类
能源科技引用本文复制引用
徐夏波,王成彬,尹丛勃,张振东..增压预燃室点火式汽油机稀薄燃烧及排放特性[J].内燃机工程,2025,46(5):19-27,9.基金项目
上海市科技计划项目(21010503000) Shanghai Science and Technology Plan Project(21010503000) （21010503000）
