EXHAUST EMISSION CONTROL DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an exhaust emission control device capable of suppressing the thermodecomposition of ammonia when heating a heated member provided in an exhaust system for an engine with chemical heat storage using the ammonia.SOLUTION: An exhaust emission control device 1 includes an oxidation catalyst 4 disposed in an exhaust pipe 3 formed of a magnetic substance, and reactors 8 for heating the oxidation catalyst 4 with chemical heat storage using ammonia. The reactors 8 are arranged around the exhaust pipe 3 and divided into a plurality of ones. The outer face of each reactor 8 is formed of a magnetic substance. A coil 15 is wound on the outer face of each reactor 8, and an external power supply 16 is connected to each coil 15 for supplying voltage thereto. Normally, each reactor 8 is being isolated from the outer peripheral face of the exhaust pipe 3. When the external power supply 16 is turned on, current flows in each coil 15 to generate electromagnetic force in each reactor 8. By the electromagnetic force, each reactor 8 is attracted to (put in contact with) the outer peripheral face of the exhaust pipe 3.