CAJ | 학술논문

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。
장1태전통적사충정기유궤개조성공질이항주공적신형순배내연궤，개조후적내연궤일개공작순배유전후량개기항완성，전항화전통적사충정기유궤공작과정상동，후항위비연소항，전항적연기통과전접관진입후항，최후종후항배출내연궤。개조후적내연궤화원궤상비，재연유경제성상유명현적우세。주요탐토료전후항용적비적변화대내연궤성능적영향，통과GT-Power방진발현，부분부하시최저유모용적비수착뉴구적증대축점증대，이수착전속변화궤호불변；외특성공황하，매일전속대응존재뉴구최대화연유소모솔최저적최우용적비，병차수착전속제고，최우용적비축점변소。
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 .