Exhaust treatment system implementing temporary engine control

Abstract

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 fluid handling component located upstream of the power source to vary an amount of oxygen in the flow of exhaust, 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 an adjustment to the fluid handling component required to provide sufficient oxygen in the exhaust flow for filter regeneration. The controller may further determine an effect the adjustment will have on operation of the power source, and determine an correction for the power source to account for the effect. The controller may substantially simultaneously implement the adjustment and the correction.

1 . An exhaust treatment system associated with a power source, comprising:
 a filter located to remove particulate matter from a flow of exhaust produced by the power source;   a regeneration device located proximal the filter to raise a temperature of the removed particulate matter above an ignition threshold;   a fluid handling component located upstream of the power source to vary an amount of oxygen in the flow of exhaust; and   a controller in communication with the regeneration device and the fluid handling component, the controller being configured to:
 determine a need for filter regeneration; 
 determine an adjustment to the fluid handling component required to provide sufficient oxygen in the exhaust flow for filter regeneration; 
 determine an effect the adjustment will have on operation of the power source; 
 determine a correction for the power source to account for the effect; and 
 substantially simultaneously implement the adjustment and the correction. 
   
   
   
       2 . The exhaust treatment system of  claim 1 , wherein the regeneration device is a fuel-fired burner. 
   
   
       3 . The exhaust treatment system of  claim 1 , wherein the fluid handling component is an EGR valve configured to selectively restrict exhaust from flowing to an intake of the power source. 
   
   
       4 . The exhaust treatment system of  claim 1 , wherein the adjustment is an increase in the restriction. 
   
   
       5 . The exhaust treatment system of  claim 1 , wherein the fluid handling component is a charged air bypass valve configured to divert charged air around the power source to the exhaust flow. 
   
   
       6 . The exhaust treatment system of  claim 1 , wherein the adjustment is an increase in an amount of the charged air directed around the power source to the exhaust flow. 
   
   
       7 . The exhaust treatment system of  claim 1 , wherein the effect the adjustment will have on operation of the power source is associated with an increase in an exhaust constituent. 
   
   
       8 . The exhaust treatment system of  claim 1 , wherein the effect the adjustment will have on operation of the power source is associated with a power output of the power source. 
   
   
       9 . The exhaust treatment system of  claim 1 , wherein the effect the adjustment will have on operation of the power source is associated with a fuel efficiency of the power source. 
   
   
       10 . The exhaust treatment system of  claim 1 , wherein the correction for the power source is associated with a change in a fueling parameter. 
   
   
       11 . The exhaust treatment system of  claim 1 , wherein the correction for the power source is associated with a change in an air intake parameter. 
   
   
       12 . A method of operating a power source, comprising:
 combusting a fuel and air mixture to generate power and a flow of exhaust;   removing and collecting particulate matter from the flow of exhaust;   determining a need for a reduction in the amount of collected particulate matter;   determining an adjustment in the flow of exhaust required for the reduction;   determining an effect the adjustment will have on operation of the power source;   determining a correction for the power source to account for the effect; and   substantially simultaneously implementing the adjustment and the correction.   
   
   
       13 . The method of  claim 12 , further including injecting fuel into the exhaust flow simultaneous with the implementing of the adjustment and the correction. 
   
   
       14 . The method of  claim 12 , wherein implementing the adjustment includes increasing a restriction on a flow of exhaust into the power source. 
   
   
       15 . The method of  claim 12 , wherein implementing the adjustment includes increasing an amount of charged air diverted around the power source to the flow of exhaust. 
   
   
       16 . The method of  claim 12 , wherein the effect the adjustment will have on operation of the power source is associated with a concentration change in an exhaust constituent. 
   
   
       17 . The method of  claim 12 , wherein the effect the adjustment will have on operation of the power source is associated with a power output of the power source. 
   
   
       18 . The method of  claim 12 , wherein the effect the adjustment will have on operation of the power source is associated with a fuel efficiency of the power source. 
   
   
       19 . The method of  claim 12 , wherein the correction for the power source is associated with at least one of a change in a fueling parameter and a change in an air intake parameter. 
   
   
       20 . An engine system, comprising:
 an engine configured to combustion a fuel and air mixture to generate power and a flow of exhaust;   a charged air induction circuit configured to introduce compressed air into the engine;   an exhaust circuit configured to direct the flow of exhaust from the engine to the atmosphere;   a filter located to remove particulate matter from the flow of exhaust;   a regeneration device located proximal the filter to raise a temperature of the removed particulate matter above an ignition threshold;   a valve located upstream of the engine to vary an amount of oxygen in the flow of exhaust; and   a controller in communication with the regeneration device and the valve, the controller being configured to:
 determine a need for particulate filter regeneration; 
 determine an adjustment to the valve required to provide sufficient oxygen in the exhaust flow for filter regeneration; 
 determine an effect the adjustment will have on operation of the engine; 
 determine an correction for the engine to account for the effect; and 
 substantially simultaneously implement the adjustment and the correction.