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.
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
DOI：
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
基金项目:总装重大预研项目（7131319）
作者单位
黄开胜，张尧，刘刚，刘胜，贾桢，张扬军 1.清华大学 汽车工程系 汽车安全与节能国家重点实验室，北京 100084；2.北京航天发射技术研究所，北京 100076；3.军事交通学院 军用车辆系，天津 300161；4.中国北方发动机研究所，天津 300400；5.北京电动车辆协同创新中心，北京 100084 
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摘要:在一台3.8 L涡轮增压中冷4缸柴油机上通过试验和仿真研究了进气压力对柴油机燃烧和性能的影响。试验中拆除了原机增压器及中冷器，通过自制压力调节装置直接控制柴油机进、排气压力。试验及仿真结果表明：在排气压力维持不变的条件下，最高燃烧压力与进气压力具有明显的线性关系，进气压力每增加100 kPa，最高燃烧压力增加约4.8 MPa~7.0 MPa；进气压力对最高燃烧压力相位的影响不明显；空气质量流量与进气压力具有明显的线性关系，进气压力每增加10 kPa，空气质量流量增加约13~37 kg/h；柴油机排气温度与空燃比具有明显的线性关系，空燃比每增加1，柴油机排气温度降低约4.2 ℃；随进气压力增加，柴油机缸内燃烧滞燃期缩短，燃烧始点提前，但进气压力对燃烧持续期没有明显影响；进气压力每增加10 kPa，发动机转矩增加约0.8~2.5 N·m。
Abstract:An experimental study was carried out on a 3.8 L 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 4.8~7.0 MPa every time the intake pressure increases by 100 kPa. 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 13~37 kg/h every time the intake pressure increases by 10 kPa. 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 0.8~2.5 N·m every time the intake pressure increases by 10 kPa.
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