Systems and methods for engine coolant temperature control
AssigneeCummins Inc.
InventorsMihir Desai, Luke T. Jennings, Robert J. Thomas
Life of this patent
Estimating the term…
Abstract
A controller includes 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: determine a target engine outlet coolant temperature for a coolant in an engine system; determine an adjustment to a temperature of the coolant based on a determined engine inlet coolant temperature and the target engine outlet coolant temperature; 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.
Claims17
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.
A method of controlling engine coolant temperature, the method comprising:
- receiving a target engine outlet coolant temperature for a coolant in an engine system;
- determining 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
- altering a flow of the coolant by controlling a coolant valve in response to the determination of the adjustment to the temperature of the coolant.
A non-transitory computer readable medium having computer-executable instructions embodied therein that, when executed by a computing system, causes the computing system to perform operations, the operations comprising:
- receiving a target engine outlet coolant temperature for a coolant in an engine system;
- determining 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
- altering a flow of the coolant by controlling a coolant valve in response to the determination of the adjustment to the temperature of the coolant.
Dependencies are inferred from the claim text.