Patent ID: 6588203
Filing Date: 2003-07-08
Classification: F01N

Abstract:
An exhaust gas purification apparatus of an internal combustion engine comprising:a silencer body having an end portion and an exhaust gas inflow opening through which an exhaust gas is introduced into an interior of the silencer body; an exhaust gas flow passage having opposing ends and a passage portion extending within the interior of the silencer body, a first exhaust gas inflow-outflow opening being formed at one of said opposing ends of the exhaust gas flow passage, a second exhaust gas inflow-outflow opening being formed at the other of said opposing ends of the exhaust gas flow passage, all of said exhaust gas inflow opening, said first exhaust gas inflow-outflow opening, and said second exhaust gas inflow-outflow opening being arranged in said end portion of the silencer body; a particulate filter arranged in said passage portion of the exhaust gas flow passage; and a flow path switching valve device arranged in said end portion of the silencer body for causing an exhaust gas, discharged from the engine and directed to the silencer body, to selectively flow into said exhaust gas inflow opening, said first exhaust gas inflow-outflow opening, and said second exhaust gas inflow-outflow opening.