摘要
将1台传统的四冲程汽油机改造成工质移缸做功的新型循环内燃机,改造后的内燃机一个工作循环由前后两个气缸完成,前缸和传统的四冲程汽油机工作过程相同,后缸为非燃烧缸,前缸的燃气通过转接管进入后缸,最后从后缸排出内燃机。改造后的内燃机和原机相比,在燃油经济性上有明显的优势。主要探讨了前后缸容积比的变化对内燃机性能的影响,通过GT-Power仿真发现,部分负荷时最低油耗容积比随着扭矩的增大逐渐增大,而随着转速变化几乎不变;外特性工况下,每一转速对应存在扭矩最大和燃油消耗率最低的最优容积比,并且随着转速提高,最优容积比逐渐变小。
A conventional 4-stroke gasoline engine was modified into an innovative internal combustion engine with the tech-nology of charge transit between different cylinders .The working cycle of the new engine was conducted by a pair of cylinders . The former cylinder worked in the form of conventional 4-stroke cycle ,while the latter cylinder worked in the form of non-com-bustion 4-stroke cycle .The burned gas of former cylinder flowed into the latter cylinder through a connection pipe and then ex-hausted out of the engine from the latter cylinder .Compared with the original engine ,the new engine had better fuel economy . Moreover ,the influence of volume ratio variation between former and latter cylinders on engine performance was studied .Ac-cording to the results of GT-Power simulation ,the volume ratio of lowest fuel consumption in partial load increased with the in-crease of torque and hardly changed with the increase of speed .In the conditions of external characteristic ,the optimal volume ratio with maximum torque and lowest fuel consumption existed and gradually decreased with the increase of engine speed .
出处
《车用发动机》
北大核心
2014年第4期31-35,共5页
Vehicle Engine
基金
国家自然科学基金(51176082)
关键词
工质移缸
燃油经济性
容积比
内燃机
charge transit between different cylinders
fuel economy
volume ratio
internal combustion engine
