Methods of controlling reductant addition

Details Methods of controlling reductant addition Methods of controlling reductant addition

2011-01-04

2011-01-04

Denion, Thomas E (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

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

C060S274000, C060S295000, C060S301000, C060S303000

Reexamination Certificate

active

07861516

ABSTRACT:
An exhaust system for a vehicular lean-burn internal combustion engine includes a NOxreduction catalyst, a source reductant, means (20) for contacting the catalyst with the reductant, means for sensing the temperature of the exhaust gas and/or the catalyst bed and means, when in use, for controlling reductant addition. The reductant addition control means supplies an amount of reductant to the catalyst at a rate corresponding to a measured temperature value of the exhaust gas and/or catalyst bed, which temperature value has been pre-determined to correlate, in use, with an amount of NOxin the exhaust gas.

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