【摘要】 搭建了LNG燃料发动机多点喷射进气系统模拟试验平台;根据原发动机的配气定时进行模拟平台进气顶置凸轮的设计,并采用GT-SUITE仿真软件对凸轮型线进行优化。通过气门升程、气门速度、跃度、落座力、凸轮与顶杆接触应力、气门弹簧受力等参数来评价所设计的凸轮型线的可行性。结果表明:设计的凸轮型线满足试验平台的设计要求,并与原型机的进气规律具有一致性。同时指出:实际应用中为检验该凸轮型线的设计是否合理,还须进行相关性能试验。更多还原

【Abstract】 The engine simulation platform for the experiments of multi-point injection intake system in LNG fuel engine was built. According to the original engine valve timing,the design of overhead cam was simulated with the simulation platform and the GT-SUITE simulation software was used to optimize the cam profile. The feasibility of the cam profile was evaluated by experimental parameters such as valve lift,valve speed,yaw,seating force,the contact stress of cam and push rod,and valve spring force,etc. The results show that the cam profile could satisfy the design requirements of experiment platform,and share the same inlet rule as the prototype. It is also pointed out that relative performance tests are still required to verify the rationality of the cam profile.更多还原