US 11,891,944 B2
Systems and methods for engine coolant temperature control
Mihir Desai, Seymour, IN (US); Luke T. Jennings, Columbus, IN (US); and Robert J. Thomas, Indianapolis, IN (US)
Assigned to Cummins Inc., Columbus, IN (US)
Appl. No. 17/914,092
Filed by Cummins Inc., Columbus, IN (US)
PCT Filed Mar. 23, 2021, PCT No. PCT/US2021/023600
§ 371(c)(1), (2) Date Sep. 23, 2022,
PCT Pub. No. WO2021/195029, PCT Pub. Date Sep. 30, 2021.
Claims priority of provisional application 62/994,029, filed on Mar. 24, 2020.
Prior Publication US 2023/0124692 A1, Apr. 20, 2023
Int. Cl. F01P 7/16 (2006.01); F01P 7/14 (2006.01)
CPC F01P 7/167 (2013.01) [F01P 2007/146 (2013.01); F01P 2025/30 (2013.01); F01P 2025/32 (2013.01); F01P 2025/62 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A system, comprising:
a controller comprising at least one processor coupled to a memory storing instructions that, when executed by the at least one processor, cause the at least one processor to perform operations comprising:
receive a target engine outlet coolant temperature for a coolant in an engine system;
determine an adjustment to a temperature of the coolant based on an engine inlet coolant temperature and the target engine outlet coolant temperature, wherein the determination of the adjustment to the temperature of the coolant comprises utilizing a cascade control loop, the cascade control loop comprising an inner loop and an outer loop, wherein the inner loop is based on the engine inlet coolant temperature measured by an inlet sensor, and wherein the outer loop is based on an engine outlet coolant temperature measured by an outlet sensor; and
alter a flow of the coolant by controlling a coolant valve in response to the determination of the adjustment to the temperature of the coolant.