Monitor of ammonia in dosing system
AssigneeInternational Truck Intellectual Property Company, LLC
InventorsJames C. Bradley, Anthony J. Cook, Lev A. Datskovskiy, Mark Christen Bach
Life of this patent
Estimating the term…
Abstract
An ammonia dosing system has a canister whose interior contains ammonia luminophores and a delivery apparatus for delivering ammonia from the canister interior into an exhaust after-treatment system to entrain with engine exhaust flowing toward an SCR catalyst for catalytic conversion of NOx in engine exhaust.
Claims13
An internal combustion engine comprising:
- an exhaust after-treatment system comprising an SCR catalyst;
- an ammonia dosing system comprising a canister having an interior containing ammonia luminophores and a delivery apparatus for delivering ammonia from the canister interior into the exhaust after-treatment system to entrain with engine exhaust flowing toward the SCR catalyst for catalytic conversion of NOx in the engine exhaust.
A method for detection of ammonia in an ammonia dosing system which delivers ammonia into an engine exhaust after-treatment system to entrain with exhaust flowing toward an SCR catalyst for catalytic conversion of NOR, the method comprising:
- installing in the ammonia dosing system an ammonia storage canister which contains ammonia luminophores;
- operating the ammonia dosing system to deliver ammonia from the ammonia storage canister into the exhaust after-treatment system;
- and
- using at least one optical sensor to detect luminescence of ammonia luminophores in the ammonia dosing system.
Dependencies are inferred from the claim text.