In order to solve the problem of torque drop of diesel engine at high altitude,the performance tests of a diesel engine at dif-ferent altitudes from 0 to 4500m were carried out by a plateau intake and exhaust simulation test rig,and the dynamic performance and economic performance of diesel engine at different altitudes were analyzed.Results shows that with the increase of altitude.the torque of diesel engine gradually decreases and fuel consumption rate increase.At the same altitude,with the decrease of speed,the torque also decreases,and fuel consumption rate increase,and this phenomenon is more obvious at ligh-altitude.Subsequently,by adoping two-stage regulated turbocharging system,increasing excess air coefficient,optimizing the structure and paramenters of fuel system,the dynamic performance and economic performance of diesel engine in plateau environment have been significantly improved,which provides a feasible technical direction for the improvement of diesel engine plateau performance.
关键词
柴油机/高原性能/二级可调整压系统/过量空气系数/燃油系统结构
Key words
diesel engine/plateau performance/two-stage regulated turbocharging system/excess air coefficient/fuel system structure
维普
万方数据