| 摘要 |
PROBLEM TO BE SOLVED: To minimize trouble caused by clogging of an injection nozzle.SOLUTION: An electric heater 200 is disposed around the injection nozzle 120, and a circumference of the electric heater 200 is covered by heat insulating material 202. A temperature sensor TS5 passing through the heat insulating material 202 and the electric heater 200 are disposed near the injection nozzle 120, and detects temperature Ta representing temperature of an inside of the injection nozzle 120. The electric heater 200 eliminates or prevents the injection nozzle 120 from clogging by heating the injection nozzle 120, and melting or gasifying crystal of reducing agent RA solidifying in the injection nozzle 120. The heat insulating material 202 inhibits heat radiation from the electric heater 200 and increases heating efficiency of the electric heater 200. |
