杨君1，王明杰2*，李延骁1
1.山东交通学院汽车工程学院，山东济南250357; 2.山东交通学院机动车检测实验中心，山东济南250100
摘要：为研究燃气发动机废气再循环的随机调节问题，建立缸内废气总质量的离散动态模型，将下一循环的缸内废气总质量表示为当前循环的缸内废气总质量、缸内吸入空气质量、喷入缸内燃气质量、再循环废气质量的函数。基于建立的离散动态模型，设计能够将缸内废气总质量调节到设定值邻域内的随机调节器。MATLAB/Simulink数值仿真研究表明，设计的随机调节器在3种工况下均能将缸内废气总质量调节到其设定值的邻域内，随机调节器有效。
关键词：燃气发动机；废气再循环；随机调节
Abstract:For research of stochastic regulation problem of exhaust gas recirculation of natural gas engines, the discretetime dynamic model of total mass of incylinder exhaust gas is established in which the total mass of incylinder exhaust gas at next cycle is presented as a function of the total mass of incylinder exhaust gas, air mass breathing into the cylinder, fuel mass injected into the cylinder, recirculating exhaust gas mass at the current cycle.Based on the established discretetime dynamic model, the stochastic regulator is designed by which the total mass of incylinder exhaust gas can be regulated into a neighborhood of its set value. The numerical simulation based on MATLAB/Simulink shows that the total mass of incylinder exhaust gas can be regulated into a neighborhood of its set value by the designed stochastic regulator under three working conditions, and the stochastic regulator is validated.
Keywords:natural gas engines; exhaust gas recirculation; stochastic regulation
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