Abstract
This research examined the effect of the residual gas condition on the HCCI combustion process, about which there have been many unclear points heretofore. Specifically, the influence of the residual gas condition on low-temperature reactions, ignition and the combustion state following ignition was investigated. A spectroscopic measurement technique was used to investigate the effect on low-temperature reactions. By analyzing the emission and absorption spectra, the formation behavior and wavelength bands of the chemical species produced during low-temperature reactions were made clear. In other words, the use of emission and absorption spectroscopic measurements provides a method for ascertaining the activity level of low-temperature reactions.
