US 11,808,195 B1
System and method for dosing a selective catalytic reduction catalyst
Jason Martz, Canton, MI (US); Paul Joseph Tennison, West Bloomfield, MI (US); Eric Matthew Kurtz, Dearborn, MI (US); and Michiel J. Van Nieuwstadt, Ann Arbor, MI (US)
Assigned to Ford Global Technologies, LLC, Dearborn, MI (US)
Filed by Ford Global Technologies, LLC, Dearborn, MI (US)
Filed on Jun. 10, 2022, as Appl. No. 17/806,377.
Int. Cl. F01N 3/20 (2006.01); B60W 20/16 (2016.01); F02D 41/00 (2006.01); F02D 41/02 (2006.01); F01N 3/32 (2006.01); B60W 10/06 (2006.01); B01D 53/94 (2006.01); B60W 10/08 (2006.01); F01N 3/029 (2006.01); F01N 3/18 (2006.01); F01N 3/08 (2006.01)
CPC F01N 3/208 (2013.01) [B01D 53/9418 (2013.01); B60W 10/06 (2013.01); B60W 10/08 (2013.01); B60W 20/16 (2016.01); F01N 3/2013 (2013.01); F01N 3/323 (2013.01); F02D 41/0002 (2013.01); F02D 41/0235 (2013.01); F01N 3/0293 (2013.01); F01N 3/0885 (2013.01); F01N 2250/12 (2013.01); F01N 2570/18 (2013.01); F01N 2610/02 (2013.01); F01N 2610/146 (2013.01); F01N 2610/1453 (2013.01); F01N 2900/04 (2013.01); F01N 2900/10 (2013.01); F01N 2900/1402 (2013.01); F01N 2900/1406 (2013.01); F01N 2900/1602 (2013.01); F01N 2900/1616 (2013.01); F01N 2900/18 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A vehicle operating method, comprising:
via a controller, supplying urea to a selective catalytic reduction (SCR) catalyst in response to a vehicle being in an off state and a temperature of the SCR catalyst being within a predetermined temperature range;
increasing a flow through the SCR catalyst in response to the vehicle being in the off state and an estimate of NH3 stored in the SCR catalyst being less than a threshold amount of NH3 where increasing the flow through the SCR catalyst includes rotating the engine via an electric machine.
 
11. A vehicle operating method, comprising:
via a controller, adjusting a temperature of a selective catalytic reduction (SCR) catalyst in response to a vehicle being in an off state and the temperature of the SCR catalyst not being within a predetermined temperature range; and
rotating an engine via an electric machine to increase the flow through the SCR catalyst.