| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an SCR system capable of thawing out urea water without hindering warming-up of an engine and heating of a vehicle cabin. <P>SOLUTION: The SCR system includes: a thaw control part 1 that opens a tank heater valve 124 at engine starting and closes the tank heater valve 124 when the temperature of the urea water detected by a temperature sensor 121 reaches a preset thaw completion determination value; and a warming-up priority control part 2 that prohibits opening of the tank heater valve 124 by the thaw control part 1 when the temperature of cooling water is less than a preset thaw permission value and allows opening of the tank heater valve 124 by the thaw control part 1 when the temperature of the cooling water becomes the thaw permission value or more. <P>COPYRIGHT: (C)2012,JPO&INPIT |
