Ozone (O₃) was introduced into the intake air to control the ignition in a gasoline compression ignition (GCI) engine. An early fuel injection at −68 °CA ATDC was adopted to mix the fuel with the reactive O-radicals decomposed from the O₃, before the reduction of the O-radicals due to their recombination would take place. The second injection was implemented near top dead center to optimize the profile of the heat release rate. The engine experiments were performed around the indicated mean effective pressure (IMEP) of 0.67 MPa with a primary reference fuel, octane number 90 (PRF90), maintaining the 15% intake oxygen concentration with the EGR. The quantity of the first injection, the second injection timing as well as the ozone concentration were changed as experimental parameters. The results showed that the GCI operation with the ozone addition makes it possible to reduce the maximum pressure rise rate while attaining high thermal efficiency, compared to that without the ozone. Appropriate combinations of the ozone concentration and the first injection quantity achieve low smoke and NO_x emissions. Further, the ozone-assisted GCI operation was compared with conventional diesel operation. The results showed that the indicated thermal efficiency of the ozone-assisted GCI combustion is slightly lower than that of the conventional diesel combustion, but that GCI assisted with ozone is highly advantageous to the smoke and NO_x emissions.

将臭氧（O ₃）引入进气中，以控制汽油压缩点火（GCI）发动机的点火。通过在-68°CA ATDC处提前进行燃油喷射，将燃油与从O ₃分解的反应性O自由基混合，在O自由基由于重组而减少之前进行。在上止点附近进行第二次注射，以优化放热速率的曲线。发动机实验是在指示的平均有效压力（IMEP）为0.67 MPa的情况下，使用辛烷值90（PRF90）的主要参考燃料进行的，并通过EGR保持了15％的进气氧浓度。改变第一次注入的量，第二次注入的时间以及臭氧浓度作为实验参数。结果表明，与不添加臭氧的情况相比，添加了臭氧的GCI操作可以降低最大压力上升率，同时获得较高的热效率。_x排放量。此外，将臭氧辅助GCI操作与常规柴油操作进行了比较。结果表明，在所指示的臭氧辅助GCI燃烧比常规柴油燃烧的略低的热效率，但GCI辅助用臭氧是烟高度有利和NO _X排放物。