CAJ | 학술논문

相继增压的动态切换特性对发动机性能有着重要的影响. 为了研究相继增压系统空气阀相对燃气阀延迟关闭时间对切出过程柴油机性能的影响,建立了基于GT-power和MATLAB/Simulink的联合仿真平台. 采用GT-power软件建立了TBD234V12柴油机仿真模型,MATLAB/Simulink软件建立了调速器、相继增压控制器和增压器喘振指数监测器仿真模型. 对不同的阀门响应时间和空气阀延迟时间进行了相继增压柴油机切出过程瞬态仿真计算,结果表明切出过程中适当的空气阀延迟时间可以明显改善切出过程柴油机稳定性和排放,阀门响应时间增加会使柴油机性能和排放恶化. 通过仿真计算确定了最佳的阀门控制策略.
상계증압적동태절환특성대발동궤성능유착중요적영향. 위료연구상계증압계통공기벌상대연기벌연지관폐시간대절출과정시유궤성능적영향,건립료기우GT-power화MATLAB/Simulink적연합방진평태. 채용GT-power연건건립료TBD234V12시유궤방진모형,MATLAB/Simulink연건건립료조속기、상계증압공제기화증압기천진지수감측기방진모형. 대불동적벌문향응시간화공기벌연지시간진행료상계증압시유궤절출과정순태방진계산,결과표명절출과정중괄당적공기벌연지시간가이명현개선절출과정시유궤은정성화배방,벌문향응시간증가회사시유궤성능화배방악화. 통과방진계산학정료최가적벌문공제책략.
The dynamic switching characteristics of the sequential turbocharging system strongly influence the engine performance. In order to research the influence of air valve' s time delay relative to exhaust valve on the diesel en-gine performance in the cutting out process, a co-simulation platform based on GT-power and MATLAB/Simulink was built in this paper. The GT-power software was used to set up the TBD234V12 diesel engine simulation model, and the MATLAB/Simulink software was used to build the governor model, sequential turbocharging ( STC) system controller model, and the turbocharger' s surge index monitor model. The transient simulation of the STC system cutting out process with different response time and air valve' s time delay was proceeded. The simulation results in-dicated proper air valve' s delay time can obviously improve stability and reduce emission of the diesel engine, while the response time prolonging has the opposite effect. The best control strategy of valves was found out finally after the simulation calculation.