| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cooling system for a reductant injection valve capable of efficiently cooling the reductant injection valve. <P>SOLUTION: In the cooling system for the reductant injection valve 55 for preventing overheating of the reductant injection valve 55 in a reductant supply device 50 used for an emission control device of an internal combustion engine and including a reductant squeeze pump 53 for sucking a liquid reductant in a reductant tank 51 to pressure-feed it, and the reductant injection valve 55 for injecting the pressure-fed liquid reductant into an exhaust pipe 3 of the internal combustion engine 1, a refrigerant passage 5 is provided through which the refrigerant flows, around the reductant injection valve 55, and the refrigerant passage 59 is interposed at some midpoint of a fuel passage 31 in a fuel injection device 10 for injecting fuel into a cylinder of the internal combustion engine 1, thus configuring so that the fuel is used as the refrigerant. <P>COPYRIGHT: (C)2013,JPO&INPIT |
