Patent ID: 6901743
Filing Date: 2005-06-07
Classification: F01N,F02M,Y02T

Abstract:
1. An exhaust gas purifying method for purifying exhaust gas from an internal combustion engine by using a catalytic converter, the method comprising: a process of collecting at least a part of the exhaust gas discharged from the internal combustion engine into a collection vessel during a period from a starting time of the internal combustion engine to satisfaction of a predetermined collection terminating condition; and a process of recirculating the exhaust gas collected in the collection vessel to an upstream side from the catalytic converter, wherein, in the collection process, a part of the exhaust gas is introduced to the catalytic converter, and a remaining part of the exhaust gas is collected into the collection vessel, the part of the exhaust gas introduced to the catalytic converter flowing to the atmosphere without being collected into the collection vessel.