内燃机工程2017，Vol.38Issue(2)：73-78,6.DOI:10.13949/j.cnki.nrjgc.2017.02.013
进气压力对发动机性能的影响研究
Research on Influence of Inlet Pressure on Diesel Engine Performance
摘要
Abstract
An experimental study was carried out on a 3.8L turbocharged inter-cooled diesel engine to reveal the influences of intake pressure on the performance of the engine.In the experiments, the turbocharger and intercooler of the engine were removed and the intake and exhaust pressures of the engine were controlled directly by a self-made pressure control system.The experiment and simulation results show that when the exhaust back pressure is kept constant, the maximum cylinder pressure is in linear relationship with the intake pressure, and the maximum cylinder pressure rises by 4.8~7.0MPa every time the intake pressure increases by 100kPa.The corresponding crank angle of the maximum cylinder pressure has no clear relationship with the intake pressure.The mass flow rate is in linear relationship with the intake pressure, and the mass flow rate goes up by 13~37kg/h every time the intake pressure increases by 10kPa.The exhaust temperature has obvious linear relationship with the air to fuel ratio, and the exhaust temperature decreases by 4.2℃ every time the air to fuel ratio increases by 1.With the increase of the intake pressure, the ignition delay will be smaller, the combustion starts earlier, but the combustion duration has no clear change.The brake torque of the engine will increase by 0.8~2.5N·m every time the intake pressure increases by 10kPa.关键词
柴油机/进气压力/气缸压力/燃烧/性能Key words
diesel engine/intake pressure/cylinder pressure/combustion/performance分类
能源科技引用本文复制引用
黄开胜,张尧,刘刚,刘胜,贾桢,张扬军..进气压力对发动机性能的影响研究[J].内燃机工程,2017,38(2):73-78,6.基金项目
总装重大预研项目(7131319) （7131319）
