Effect of water injection in a spark ignition engine using kerosene

Using kerosene for an aero piston internal combustion engine can improve system safety. Constrained by the knock limit of kerosene, the indicated mean effective pressure (IMEP) of spark ignition (SI) aero piston engine using kerosene is lower than that of gasoline. In this study, an experimental study based on a four-stroke SI aero engine was carried out. The influences of water injection on the combustion process and the improvement of IMEP were evaluated. The results indicate that the knock phenomenon can be suppressed in a certain extent with an appropriate amount of water injection.