A reductant dosing system (14) for an engine (12) is disclosed. The reductant dosing system may have a supply of reductant (18), a reservoir (20) configured to hold pressurized reductant, and a pump (22) configured to draw reductant from the supply and dis...

An exhaust gas purification apparatus includes an exhaust passage through which exhaust gas discharged from an engine flows, a selective catalytic reduction catalyst provided in the exhaust passage, a urea water supply device for supplying urea water into ...

Process for controlled addition of a reducing agent into nitrogen oxides containing exhaust gas being contacted with a selective reducing catalyst for abatement of the nitrogen oxides by reaction with the reducing agent in contact with the catalyst, compri...

An emissions control system (10) is used with a compression ignition engine (12) capable of producing an exhaust gas stream (16) to be treated by a reduction agent which is mixed with the exhaust gas stream (16) to convert the exhaust gas stream (16) prior...

An engine exhaust aftertreatment system is described in which lean NOx exhaust aftertreatment devices are employed. Because temperature in the exhaust line (38) varies as a function of distance from the engine and engine operating condition, exhaust aftert...