US 12,404,792 B2
Aftertreatment heat up strategies
James E. McCarthy, Jr., Kalamazoo, MI (US)
Assigned to EATON INTELLIGENT POWER LIMITED, Dublin (IE)
Appl. No. 18/717,664
Filed by Eaton Intelligent Power Limited, Dublin (IE)
PCT Filed Dec. 8, 2022, PCT No. PCT/EP2022/025558
§ 371(c)(1), (2) Date Jun. 7, 2024,
PCT Pub. No. WO2023/104336, PCT Pub. Date Jun. 15, 2023.
Claims priority of provisional application 63/288,594, filed on Dec. 11, 2021.
Claims priority of provisional application 63/287,487, filed on Dec. 8, 2021.
Prior Publication US 2025/0043708 A1, Feb. 6, 2025
This patent is subject to a terminal disclaimer.
Int. Cl. F01N 3/20 (2006.01); F01N 9/00 (2006.01)
CPC F01N 3/2013 (2013.01) [F01N 3/208 (2013.01); F01N 9/00 (2013.01); F01N 2900/1602 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of controlling temperature of an engine aftertreatment system, comprising:
directing an electric heater in the engine aftertreatment system to apply heat using a first temperature setpoint;
while applying the heat at the first temperature setpoint, receiving temperature data from a temperature sensor proximate to a selective catalytic reduction (SCR) device in the engine aftertreatment system;
determining from the temperature data that a first temperature is at a first threshold temperature which is less than the first temperature setpoint; and
after determining that the first temperature is at the first threshold temperature, directing the electric heater to apply heat using a second temperature setpoint which is less than the first temperature setpoint.