Abstract
Keywords
Engine Combustion, Pollution, Laser Induced Incandescence, Laser Induced Scattering, Soot
Abstract
In-cyclinder measurements of soot particle size and number density have been made using LII (Laser Induced Icandescence) and LIS (Laser Induced Scattering) measurement technique in a direct injection diesel optical engine. LIS/LIS measurement and calibration techniques with laminar diffusion flame were used to obtain quantative information of diesel soot. Two optical techniques were used simultaneously involving LII and LIS signal. One Intensified CCD camera was used to obtain 2-D radiation and scattering signal images. The light signals split through the splitter were passed through a band-pass filter, centreed at 532 nm with a 10 nm FWHM, and a band-pass filter, centred at 450 nm with a 40 nm FWHM, and were imaged with an ICCD camera simultaneously. The soot volume fraction can be calculated from the LII signal image, directly. After the relative soot diameter and number desity were established data from a laminar diffusion flame using light extinction/scattering method. Finally LII/LIS simultaneous mesuring technique for the measurement of in-cyclinder diesel soot was performed.