EXHAUST EMISSION CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE

摘要

There is provided an oxidizing catalyst located in the upstream of the exhaust gas purifying catalyst. The catalyst capacity of the oxidizing catalyst is set so that, in the relationship between a value obtained by dividing exhaust flow velocity by the catalyst capacity (exhaust flow velocity/catalyst capacity) and catalyst activatibility, when the exhaust flow velocity is exhaust flow velocity at the time of idle operation of the internal combustion engine, the catalyst activatibility is maximum (prescribed maximum activation range) and the value obtained by dividing the exhaust flow velocity by the catalyst capacity is maximum or close to the maximum.