相继增压柴油机瞬态切换喷油策略

摘要

针对相继增压柴油机切换过程中存在的问题,提出了利用多目标进化算法对TBD234V12相继增压柴油机的瞬态切换过程进行优化设计.选取切换延迟时间内的循环喷油量作为设计变量,在功率和最大爆发压力的约束条件下,采用Sobol序列产生初始均匀种群,利用Pareto的非支配排序的方法对相继增压柴油机瞬态切换过程的喷油规律进行了优化,最高可以使相继增压柴油机切换过程中转速波动及碳烟排量分别降低88％和79％.通过对TBD234V12相继增压柴油机切换过程燃油喷射MAP图进行优化,达到了改善切换过程瞬态性能的目的.%In light of the problems of the transient switching process of a sequential turbocharging diesel design,the multi-objective evolutionary algorithm was used to optimize the transient switching process of the TBD234V12 sequential turbocharging diesel design By taking the fuel delivery per cycle per cylinder in the cut-in delay time as the design variables,restraining the conditions of power and maximum cylinder pressure,generating the initial uniform population through using the Sobol sequence,and optimizing the fuel injection rate of the transient switching process by applying Paretos non-dominated sorting method,the fuel injection rate in the transient switching process of the sequential tuborcharging diesel engine was optimized.The results show that the fluctuation of speed and the soot decreased by no less than 88% and 79%,respectively.With the optimization of the fuel injection map in the transient switching process of the TBD234V12 sequential turbocharging diesel engine,the engines transient switching performance was improved.