高海拔可调两级增压柴油机油气协同控制研究

Study on Fuel-Air Synergistic Control of Regulable Two-Stage Turbocharged Diesel Engine Working at High Altitude

以某Ⅴ型6缸柴油机为研究对象,采用GT-Power软件开展高海拔可调两级涡轮增压柴油机油气协同控制研究。仿真模型的进气模块选用可调两级涡轮增压系统,燃烧模块的标定采用柴油机在低过量空气系数下的试验数据进行。采用该标定后的仿真模型开展了不同过量空气系数和喷油量工况下柴油机高原性能仿真计算。结果表明:在海拔4 500 m,且满足最高燃烧压力和排温限制的条件下,采用可调两级增压并结合油气协同控制,柴油机扭矩和功率可达到100%恢复;研究同时获得了最大扭矩和最大功率恢复的油气协同控制方法。

Based on a V type 6-cylinder diesel engine, GT-Power software was used to study the synergis- tic control of regulable two-stage turbocharged diesel engines working at high altitude. The two-stage turbocharging system was adopted in the simulation model as inlet module. The combustion module was calibrated by the experimental data of the diesel engine at low excess air ratio. After the simulation model was verified by experimental data, the simulation of the plateau performance of the diesel engine under different excess air coefficients and fuel injection conditions was carried out. Under the conditions of sa- tisfying maximum combustion pressure and temperature limit, the results show that with the use of regula- ble two-stage turbocharging technology combining with fuel-air synergy control, the diesel engine can achieve 100% torque recovery and power recovery at altitude of 4 500 m, and obtain the fuel-air synergistic control method of maximum torque and maximum power recovery.