| 摘要 |
PROBLEM TO BE SOLVED: To provide an additive supply device for an engine, in which a heating part for heating and unfreezing an additive can be adequately operated.SOLUTION: The additive supply device for the engine includes a urea water supply mechanism which is provided outside an engine room and includes: a tank for storing urea water; a pump for delivering the urea water; and a supply passage for supplying the urea water to an exhaust passage of the engine. The additive supply device further includes a heater for heating the urea water in the urea water supply mechanism, and an intake air temperature sensor which is provided in the engine room and detects an intake air temperature THA in the engine. When the intake air temperature THA is low (S101:YES), the heater is operated (S102). When the intake air temperature becomes high thereafter (S103:YES), the operation of the heater is stopped (S105). When the intake air temperature THA and the temperature of the urea water in an urea water supply system deviate from each other during the operation of the heater (S104:NO), the operation of the heater is continued. |
