EXHAUST GAS PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE

摘要

An exhaust gas purification device for an internal combustion engine simultaneously achieves at a high level a reduction in exhaust emission and removal of particulate matters (PM). An upstream-side three-way catalyst (18) not containing an OSC material is provided in an exhaust pipe (14) directly downstream of an exhaust manifold (12). A particulate filter (PM filter)(20) for capturing particulate matters (PM) contained in exhaust gas is placed on the downstream side of the upstream-side three-way catalyst (18). A downstream-side three-way catalyst (22) containing the OSC material is placed on the downstream side of the PM filter (20).