| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust pipe liquid injection system, etc. for an internal combustion engine including a liquid injection device upstream of an exhaust emission control device in an exhaust passage of the internal combustion engine, preventing liquid injected in the exhaust passage from adhering to an inner peripheral side of the exhaust passage to inhibit increase of a liquid consumption and improving a flow of exhaust gas at a bent pipe part to reduce pressure loss before the exhaust emission control device. <P>SOLUTION: The liquid injection device 25 is installed at the bent pipe part 22, a flow path control valve 26 is provided in a portion 24 downstream of the bent pipe part 22, increased in cross-sectional area, and the flow path control valve 26 is constructed to pass the flow of the exhaust gas G of the bent pipe part 22 on an inner peripheral side and narrow a flow path of the exhaust gas G when closed and to pass the flow of the exhaust gas G of the bent pipe part 22 while dividing it into two on an outer peripheral side and the inner peripheral side of a valve element 26b of the flow path control valve 26 when opened. <P>COPYRIGHT: (C)2010,JPO&INPIT |
