US 12,345,189 B2
eCAT inferred heater temperature control to enable high power heating during low flow conditions
Mario Balenovic, Waalre (NL); Frederik De Smet, Zonhoven (BE); Maria Armiento, Aachen (DE); and Ke Fan, Würselen (DE)
Assigned to Ford Global Technologies, LLC, Dearborn, MI (US)
Filed by Ford Global Technologies, LLC, Dearborn, MI (US)
Filed on Dec. 8, 2022, as Appl. No. 18/063,415.
Claims priority of application No. 102021133131.5 (DE), filed on Dec. 14, 2021.
Prior Publication US 2023/0184149 A1, Jun. 15, 2023
Int. Cl. F01N 3/20 (2006.01); F01N 9/00 (2006.01)
CPC F01N 3/2013 (2013.01) [F01N 9/005 (2013.01); F01N 2900/0602 (2013.01); F01N 2900/1404 (2013.01); F01N 2900/1411 (2013.01); F01N 2900/1602 (2013.01); F01N 2900/1626 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
when an exhaust mass flow is greater than or equal to a threshold flow, controlling operation of an electric heating element based on a temperature of a catalyst; and
when the exhaust mass flow is less than the threshold flow,
modeling an electrical resistance of the electric heating element,
determining a power requirement of the electric heating element based on a deviation of the modeled electrical resistance of the electric heating element from a measured electrical resistance of the electric heating element, and
controlling operation of the electric heating element based on a comparison between an estimated temperature of the electric heating element and a threshold element temperature.