Temperature distribution of combustion flame in the gasoline engine by means of two-color method

The feasibility to measure temperature distribution in the gasoline engine using the two-color method is investigated. By substituting alumina particles for soot created in the diesel engine to emit luminous flames, the temperature distribution in the gasoline engine cylinder is calculated on the basis of the pictures, which are taken by the high speed CCD camera. In order to test feasibility, the premixed flame of methane in a burner is used to validate the method. The errors made by different combinations of any two wavelengths are discussed. The results show that the method using alumina particles and RB wavelength can get better precision. The two-color method is then used to analyze combustion flame of the optical single cylinder gasoline engine by spraying alumina particles into the intake manifold and the information of temperature distribution is finally acquired.