Calculation of High Altitude Power Recovery for D6114 Diesel Engine

Based on the simulation of atmospheric environment parameters and the plateau correction of compressor map,the simulation model of high altitude performance for D6114diesel engine was built.The calculation research on varying altitude performance of original engine was carried out.The research on power recovery of different turbocharging systems at high altitude was also conducted.The results show that the power and economic performance of turbocharged diesel engine become worse with the increase of altitude.The waste-gate turbocharging system can partly recover the engine power at medium speed.The turbocharger overspeed will occur at high speed and influence the operation of engine.As for regulated two-stage tubocharging system,the bypass of high pressure turbochager is much better than that of low pressure turbocharger in terms of power recovery and economic performance.