利用移动式内燃机集装箱试验台架,对电控LN G发动机高原动力恢复进行试验研究,通过对燃空比、点火提前角、进气压力控制参数的调整及优化,发动机的动力性、经济性得到明显改善。实地试验表明,参数优化后,海拔高度的变化对LN G发动机中高速区的动力性影响较小,海拔每升高1 000 m,最大转矩仅下降2.0%,标定功率仅下降2.3%。 The experimental study on the motive power recovery of electrically controlled LNG engine is carried out by using mobile test bench of internal combustion engine. Through the adjustment and optimization of the air-fuel ratio, ignition advance angle and intake pressure control parameters, the engine power and economy are obtained Significant improvement. Field tests show that after the optimization of parameters, the change of altitude has little effect on the dynamic performance of mid-high speed zone of LNG engine. The maximum torque decreases by only 2.0% for every 1000 m above sea level and the nominal power decreases only by 2.3%.