US 12,035,427 B2
Alternator modulation for control of exhaust heating element
Charles Wayne Reinhardt Swart, Bellingham, WA (US)
Assigned to PACCAR Inc., Bellevue, WA (US)
Filed by PACCAR Inc, Bellevue, WA (US)
Filed on Feb. 1, 2022, as Appl. No. 17/590,063.
Claims priority of provisional application 63/144,368, filed on Feb. 1, 2021.
Prior Publication US 2022/0243631 A1, Aug. 4, 2022
Int. Cl. H05B 3/00 (2006.01); G01R 31/371 (2019.01); G08B 21/18 (2006.01); H01M 10/42 (2006.01); H01M 10/48 (2006.01); H02J 7/00 (2006.01); H02P 9/14 (2006.01); H05B 1/02 (2006.01)
CPC H05B 3/0019 (2013.01) [G01R 31/371 (2019.01); G08B 21/18 (2013.01); H01M 10/488 (2013.01); H02J 7/0045 (2013.01); H02J 7/0047 (2013.01); H02P 9/14 (2013.01); H05B 1/0236 (2013.01); H01M 2010/4271 (2013.01); H01M 2010/4278 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A system for modulating power provided to an electric heating element of a vehicle exhaust system, the system comprising:
a controller controlling a switch;
an alternator having a first field terminal input, wherein the first field terminal input is connected to the switch; and
an electric heating element connected to at least an output of the alternator;
wherein the controller is configured to determine a power demand for the electric heating element and modulate the first field terminal input by actuating the switch in accordance with a duty cycle determined based on the power demand to cause the alternator to provide power to the electric heating element according to the power demand.