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US 11,649,760 B1Granted
Method and system for diagnosing an engine coolant pump
AssigneeFord Global Technologies, LLC
InventorAed Dudar
Life of this patent
Estimating the term…
Abstract
Methods and systems to diagnose operation of an engine coolant pump are presented. In one example, the engine coolant pump is operated while an engine is stopped so that operation of the coolant pump may not effect engine operation. The engine coolant pump may be operated at different speeds to assess engine coolant pump operation.
Claims19
A method for diagnosing operation of an engine coolant pump, comprising:
- rotating the engine coolant pump at a first speed via a controller in response to an engine not rotating;
- monitoring output of a temperature sensor while operating the engine coolant pump at the first speed;
- comparing output of the temperature sensor to a predetermined temperature response;
- and
- activating an engine cooling fan in response to the engine not rotating.
2 more elements
A system for diagnosing an engine coolant pump, comprising:
- an internal combustion engine including a coolant pump;
- and
- a controller including executable instructions stored in non-transitory memory that cause the controller to command the coolant pump to a first speed while the internal combustion engine is not rotating, command the coolant pump to a second speed while the internal combustion engine is not rotating, and compare output of a temperature sensor to an expected temperature response.
A method for diagnosing operation of an engine coolant pump, comprising:
- rotating the engine coolant pump at a first speed and a second speed via a controller in response to an engine not rotating;
- monitoring output of a temperature sensor while operating the engine coolant pump at the first speed and the second speed;
- and
- comparing output of the temperature sensor to a first predetermined temperature response and a second predetermined temperature response.
1 more element
Dependencies are inferred from the claim text.