| 摘要 |
[PROBLEM] To provide an engine powered machine provided with a high-performance exhaust gas purification system and capable of promptly raising a temperature of an operator' s cab to a comfortable temperature. [SOLUTION] An exhaust gas purification system that makes use of an NOx removal catalyst 3 and a reducing agent is provided with a reducing agent heater 13 for heating a reducing agent, which is stored in a reducing agent tank 5, with heat of an engine cooling medium and an on/off device 14 for controlling an introduction of the engine cooling medium into the reducing agent heater 13. When a temperature of the engine cooling medium is higher than a first predetermined temperature, a temperature of the reducing agent in the tank 5 is lower than a secondpredetermined temperature and a temperature in an operator's cab 7 is lower than a third predetermined temperature, a controller 15 switches the on/off device 14 into a closed state to increase a flow rate of the engine cooling medium to be guided to a heat exchanger 8a of a heating apparatus 8. |
