EXHAUST GAS ANALYZING DEVICE AND EXHAUST GAS ANALYZING METHOD

摘要

An exhaust gas analyzing device capable of measuring in real time the concentration of particulate materials contained in exhaust gas from an internal combustion engine, comprising an exhaust gas passing hole (21) that admits exhaust gas exhausted from an internal combustion engine, an optical fiber (25) for applying a laser beam in a direction perpendicular to an exhaust gas flow running through this exhaust gas passing hole, a detector (26) receiving a laser beam after passed through exhaust gas, a photodetector (71) receiving Mie scattering light produced from particulate materials PM contained in exhaust gas by laser beam irradiation, and a personal computer (45) as a computing unit for computing the concentrations of components in exhaust gas based on light reception data on transmitted light intensity obtained from the detector (26) and also computing the concentrations of particulate materials contained in exhaust gas based on an actually measured data on scattering light intensity obtained from the photodetector (71); and an exhaust gas analyzing method.