Exhaust gas purifier in an internal combustion engine

摘要

An exhaust gas purifier in an internal combustion engine having a plurality of cylinders and two separate exhaust manifolds. Two separate exhaust pipes are connected to the corresponding exhaust manifolds, one of the exhaust pipes being joined with the other exhaust pipe. The recirculated exhaust gas is extracted from the one exhaust pipe and is delivered into the air intake system. Secondary air is fed into the other exhaust manifold.