Method of controlling fuel in an exhaust treatment system implementing temporary engine control

Abstract

The invention relates to a method of controlling fuel in an exhaust treatment system implementing temporary engine control. An exhaust treatment system associated with a power source is disclosed. The exhaust treatment system may have a filter located to remove particulate matter from a flow of exhaust, and a regeneration device located proximal the filter. The exhaust treatment system may also have a first fluid handling component located upstream of the power source to vary an amount of oxygen in the flow of exhaust, a second fluid handling component located downstream of the power source to vary the amount of exhaust air flow in the exhaust circuit, and a controller in communication with the regeneration device and the fluid handling component. The controller may determine a need for filter regeneration, and determine adjustments to the first and second fluid handling components required to provide sufficient oxygen and air mass flow in the exhaust for filter regeneration. The controller may further determine an effect the adjustments will have on operation of the power source, and determine corrections for the power source to account for the effects. The controller may substantially simultaneously implement the adjustments and the corrections.

Description

technical field [0001] The present invention relates generally to an exhaust treatment system, and more particularly to a method of fuel control in an exhaust treatment system implementing temporary engine control. Background technique [0002] Complex mixtures of air pollutants are emitted by engines, including diesel engines, gasoline engines, natural gas engines, and others known in the art. Air pollutants can consist of gases and solid materials, including nitrogen oxides (NOx) and particulate matter. As environmental concerns increase, exhaust emission standards become more stringent, and the amount of NOx and particulate matter emitted from an engine may be regulated depending on the type of engine, the size of the engine, and / or the rating of the engine. [0003] One approach that engine manufacturers have implemented in order to comply with regulations on NOx emissions to the environment is to recirculate exhaust gas expelled from the engine back into the engine for...

AI Technical Summary

Problems solved by technology

Additionally, regeneration of the particulate filter can negatively impact other aspects of engine performance (i.e., power output, fuel consumption, etc.) and / or unintended effects of

Also, during regeneration, a large amount of fuel is consumed as the fuel burning burner heats all the exhaust from the power source

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