EXHAUST EMISSION CONTROL DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an exhaust emission control device of high utility, which can surely avoid burnout of an injector mounted in the middle of an exhaust pipe and burning of additional fuel in a flow passage.

SOLUTION: The device is constructed that an exhaust emission purifying catalyst is installed in the middle of the exhaust pipe 9. The injector 11 for fuel addition is attached to an outside in a bending direction of a bent portion 9a of the exhaust pipe 9, which is situated upstream of the exhaust purifying catalyst, to extend along the exhaust pipe 9 upstream of the bent portion 9a. An injection space 12 is formed to extend from a tip of a nozzle 11a of the injector 11 in a direction along the exhaust pipe 9 downstream of the bent portion 9a so that fuel can be injected into the flow passage in the exhaust pipe 9 downstream of the bent portion 9a thought the injection space 12.

COPYRIGHT: (C)2004,JPO&NCIPI