US 11,852,067 B2
Systems and methods of using diesel particulate filter heater as a load bank
Adam B Carey, Cottage Grove, MN (US); James Goodsell, Lakeville, MN (US); and Grant A. Baumgardner, Minneapolis, MN (US)
Assigned to THERMO KING LLC, Minneapolis, MN (US)
Filed by THERMO KING LLC, Minneapolis, MN (US)
Filed on Feb. 28, 2022, as Appl. No. 17/682,490.
Prior Publication US 2023/0272731 A1, Aug. 31, 2023
Int. Cl. F01N 9/00 (2006.01); F01N 3/035 (2006.01); F01N 11/00 (2006.01); F01N 3/027 (2006.01); F02D 41/02 (2006.01)
CPC F01N 9/002 (2013.01) [F01N 3/027 (2013.01); F01N 3/035 (2013.01); F01N 11/002 (2013.01); F02D 41/029 (2013.01); F01N 2560/06 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A diesel particulate matter reduction system comprising:
a prime mover coupled with a generator, the prime mover being separate from another prime mover used for operating a vehicle;
a compressor powered by the prime mover;
a diesel oxidation catalyst (DOC) disposed downstream from the prime mover;
a diesel particulate filter (DPF) disposed downstream from the DOC;
a DPF heater powered by the generator, the DPF heater being configured for regenerating the DPF when the prime mover is off; and
a controller,
wherein the controller is configured to:
determine a load of the generator,
determine a load of the compressor,
determine a load of the prime mover based on the determined load of the generator and the determined load of the compressor,
control the load of the prime mover to maintain a minimum exhaust temperature for the DOC,
when the load of the prime mover is below a threshold, start a timer to determine a duration of a condition that the load of the prime mover is below the threshold,
when the duration exceeds a predetermined time duration, turn on the DPF heater to maintain the minimum exhaust temperature for the DOC, and
when the duration is at or below the predetermined time duration, turn off the DPF heater.