| 摘要 |
PURPOSE:To provide an exhaust gas purifying system which can make effective conversion of NOx, CO, HC contained in the exhaust gas from an internal combustion engine into CO2, H2O, N2, etc., which are less harmful for the environment and which requires less space for installation. CONSTITUTION:The exhaust gas emitted from an internal combustion engine (gasoline engine) 1 is purified by the first exhaust gas purifying catalyst (pre- catalyst) 2 located upstream of a plasma discharge processing device 3, introduced to the plasma discharge processing device 3 to undergo a discharge processing, and is purified by the second exhaust gas purifying catalyst (post- catalyst) 4 installed downstream of the plasma discharge processing device 3. The pre-catalyst 2 and the device 3 may be housed in a case in a single piece structure. Upstream of the pre-catalyst 2, an air supply passage 8 may be coupled so that air is supplied from an air pump 7. |
