Patent ID: 8061123
Filing Date: 2011-11-22
Classification: F01N,Y02T

Abstract:
1. A method for treating a flow of exhaust from an engine, the method comprising: injecting reductant into the flow of exhaust with an injector disposed upstream from a catalytic device, the injector and the catalytic device being disposed in an exhaust system for the engine; passing the flow of exhaust through the catalytic device; sensing a characteristic of at least one of the exhaust system and the engine, the sensed characteristic including at least one of a temperature of at least one of the flow of exhaust and a wall of a pipe of the exhaust system; monitoring the sensed characteristic to predict a formation of a decomposition material formed from the reductant, the formation of the decomposition material being predicted based on a time measurement and the sensed temperature; and controlling an operation of at least one of the engine and the exhaust system to increase a temperature in the exhaust system in response to the prediction.