REDUCING METHOD OF HAZARDOUS SUBSTANCE IN EXHAUST GAS FROM INTERNAL COMBUSTION ENGINE PROVIDED WITH EXHAUST CATALYST AND DEVICE THEREOF

摘要

PROBLEM TO BE SOLVED: To reduce hazardous substances in exhaust gas effectively by providing at least one film (separation module) through which only oxygen molecules can permeate in a chamber and making oxygen rich to supply it to an internal combustion engine. SOLUTION: A secondary air pump 20 is provided as a reducing device of hazardous substances in exhaust gas in an internal combustion engine 10, and air 22 in which oxygen 22 is made rich is supplied to the secondary air pump 20. the air 22 in which oxygen is made rich is taken into from a pressure vessel and is mixed with ambient air in a mixer. An amount of air to be blown in is controlled by a secondary air blowing valve 30 which can be operated by an engine controller. The air 22 in which oxygen is made rich is supplied to this side of exhaust gas catalyst 52 in an exhaust pipe 50 of the internal combustion engine 10 through a pipe 40. The exothermic reaction occurs is the exhaust pipe 50 due to the supply of the air 22 in which oxygen is made rich, and the catalyst 52 is heated by the exothermic reaction to reduce hazardous substances in the exhaust gas effectively.