US 12,234,757 B1
Methods and systems for regenerating a particulate filter
Aed Dudar, Canton, MI (US)
Assigned to Ford Global Technologies, LLC, Dearborn, MI (US)
Filed by Ford Global Technologies, LLC, Dearborn, MI (US)
Filed on Nov. 14, 2023, as Appl. No. 18/508,616.
Int. Cl. F01N 3/023 (2006.01); B60H 1/22 (2006.01); F01N 3/20 (2006.01); F01N 9/00 (2006.01)
CPC F01N 3/023 (2013.01) [B60H 1/2206 (2013.01); F01N 3/2006 (2013.01); F01N 9/002 (2013.01); F01N 2900/1602 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method for purging a particulate filter, comprising:
via a controller, during a first stopped engine condition, operating a fuel operated heater that is configured to heat a passenger cabin of a vehicle in response to a request to purge the particulate filter of carbonaceous soot and directing exhaust from the fuel operated heater to the particulate filter, the fuel operated heater operating with a lean air-fuel ratio, and, during a second stopped engine condition, operating the fuel operated heater with a stoichiometric air-fuel ratio and directing exhaust from the fuel operated heater to a three-way type catalyst.