Exhaust emission control device with additive injector

An exhaust emission control apparatus comprising:

• an exhaust pipe through which exhaust emission flow, said exhaust pipe including a straight section and a bent section extending from the straight section in an upstream direction of a flow of the exhaust emissions;
• a catalyst disposed downstream of the straight section of said exhaust pipe in connection therewith;
• a hollow protrusion having a length extending outside the said exhaust pipe from a peripheral wall of the bent section substantially in parallel to a longitudinal center line of the straight section, said protrusion having a first end and a second end opposed to the first end, said protrusion having an opening formed in the first end which communicates with inside the bent section of said exhaust pipe;
• and
• an additive injector designed to produce a cone-shaped spray of additive, said additive injector being installed in the second end of said protrusion and oriented to inject the cone-shaped spray of additive into said exhaust pipe through the opening of said protrusion without interfering with at least a downstream edge of the opening, the additive being carried by the flow of the exhaust emissions downstream to said catalyst and used in a given exhaust emission purification reaction, as induced by said catalyst, to purify the exhaust emissions.