Cycle performance optimization of high-power diesel engine base on multi-operating condition coordination
Based on the 3D simulation results of the verification model,this study optimizes the overall performance of the test cycle of a certain type of high-power diesel engine through coordinated matching among multiple operating condi-tions in the cycle.In the optimization process,the concepts and determination methods of"forward operating conditions"and"cooperative operating conditions"are proposed.The results show that through the coordinated matching of multiple operat-ing conditions between"forward operating condition"and"cooperative operating condition",the cycle NOx specific emis-sion can be reduced by 6.43％under the premise of only adjusting the injection angle and keeping the cycle specific fuel con-sumption not increasing.In the case of keeping the cycle NOx specific emission from increasing,the cycle specific fuel con-sumption can be reduced by 1.53％,namely,3.18 g/(kW·h).The optimization methods and processes proposed in this study have guiding significance for the overall performance optimization of diesel engine cycle conditions or multiple operating conditions.
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