Patent ID: 10626767

Abstract:
An upstream portion of a communication passage 16 in an exhaust emission control device has a gas gathering chamber 16A encircling and gathering exhaust gas 1 from an exit end of a particulate filter 3 through perpendicular turnabout of the gas 1 and a communication pipe 16B extracting the gas 1 gathered by the chamber 16A through an exhaust outlet 17 into an entry side of a selective reduction catalyst 4. An injector 18 is in the passage 16 to add urea water into the gas flow. The injector 18 is fixed to the chamber 16A in a position opposed to the outlet 17 and in a direction perpendicular to an axis of the filter 3. The outlet 17 of the chamber 16A has a reactor 19 into which the reducing agent injected by the injector 18 is impinged to facilitate gasification of the gas 1.