| 摘要 |
An engine (1) is equipped with a urea aqueous solution supply mechanism (200) that supplies urea aqueous solution into an exhaust passage (26). The urea aqueous solution supply mechanism (200) is equipped with a heater that heats the urea aqueous solution and a temperature sensor that detects the temperature of the urea aqueous solution. When the temperature of the urea aqueous solution detected by the temperature sensor during the supply of electricity to the heater becomes constant, a control device (80) executes a current reduction process to reduce the amount of electricity supplied to the heater. |
