Coolant pump flow rationalization using coolant pump parameters
AssigneeGM Global Technology Operations LLC
InventorsEugene V. Gonze, Michael J. Paratore, JR., Daniel J. Shepard
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Abstract
A method for coolant pump flow rationalization using coolant pump parameters includes calculating a first pump coolant flow based on a coolant input pressure sensor signal and the coolant pump speed. Further, the method includes calculating a second pump coolant flow based on coolant pump current and coolant pump speed when the first pump coolant flow is greater than a predetermined threshold; and comparing the first pump coolant flow with the second pump coolant flow to rationalize the coolant pressure sensor signal.
Claims9
A method for coolant pump flow rationalization using coolant pump parameters comprising:
- calculating a first pump coolant flow based on a coolant input pressure sensor signal and the coolant pump speed;
- calculating a second pump coolant flow based on coolant pump current and coolant pump speed when the first pump coolant flow is greater than a predetermined threshold;
- and
- comparing the first pump coolant flow with the second pump coolant flow to rationalize the coolant input pressure sensor signal.
A method for coolant pump flow rationalization using coolant pump parameters comprising:
- calculating a first pump coolant flow based on a coolant input pressure sensor signal and the coolant pump speed;
- calculating a second pump coolant flow based on coolant pump current and coolant pump speed when the first pump coolant flow is greater than a predetermined threshold;
- comparing the first pump coolant flow with the second pump coolant flow to rationalize the coolant pressure sensor signal;
- and
- detecting a coolant input pressure sensor failure when a difference between the first pump coolant flow and the second pump coolant flow is greater than a predetermined coolant flow error threshold.
A method for coolant pump flow rationalization using coolant pump parameters comprising:
- calculating a first pump coolant flow based on a coolant input pressure sensor signal and the coolant pump speed;
- calculating a second pump coolant flow based on coolant pump current and coolant pump speed when the first pump coolant flow is greater than a predetermined threshold;
- comparing the first pump coolant flow with the second pump coolant flow to rationalize the coolant pressure sensor signal;
- detecting a coolant input pressure sensor failure when a difference between the first pump coolant flow and the second pump coolant flow is greater than a predetermined coolant flow error threshold;
- and
- setting a diagnostic fault code when the difference between the first pump coolant flow and the second pump coolant flow is greater than a predetermined coolant flow error threshold.
Dependencies are inferred from the claim text.