Method and apparatus for urea injection in an exhaust...

Details Method and apparatus for urea injection in an exhaust... Method and apparatus for urea injection in an exhaust...

2006-07-25

2008-09-23

Denion, Thomas (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

C060S274000, C060S276000, C060S301000, C060S303000

Reexamination Certificate

active

07426825

ABSTRACT:
An exhaust aftertreatment system and control system is provided, including a urea injecting device, a selective catalyst reduction device, and, a sensing device operative to monitor a forward portion of the selective catalyst reduction device. The sensing device can comprise a NOx sensor, and alternatively, an ammonia sensor. A control module adapted to monitor signal inputs from the engine, the NOx sensing system, the temperature sensing system, and the sensing device operative to monitor a forward portion of the selective catalyst reduction device; and, adapted to control operation of the urea injecting device.

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