Engine cooling system diagnostic for applications with two coolant sensors
AssigneeGM Global Technology Operations LLC
InventorsIgor Anilovich, John W. Siekkinen, Jinhee Yu, Zhong Wang, Mikaela Waller
Life of this patent
Estimating the term…
Abstract
A temperature comparison module generates a temperature difference between an engine coolant temperature and a radiator coolant temperature. An energy determination module determines an energy value corresponding to heat energy generated by an engine. The heat energy increases at least one of the engine coolant temperature and the radiator coolant temperature. A diagnostic module generates a comparison of the temperature difference and the energy value and determines a status of a thermostat associated with the engine based on the comparison.
Claims12
An engine control system comprising:
- a temperature comparison module that generates a temperature difference between an engine coolant temperature and a radiator coolant temperature;
- an energy determination module that determines an energy value corresponding to heat energy generated by an engine, wherein the heat energy increases at least one of the engine coolant temperature and the radiator coolant temperature;
- and
- a diagnostic module that generates a comparison of the temperature difference and the energy value and determines a status of a thermostat associated with the engine based on the comparison.
A method comprising:
- generating a temperature difference between an engine coolant temperature and a radiator coolant temperature;
- determining an energy value corresponding to heat energy generated by an engine, wherein the heat energy increases at least one of the engine coolant temperature and the radiator coolant temperature;
- and
- generating a comparison of the temperature difference and the energy value and determining a status of a thermostat associated with the engine based on the comparison.
Dependencies are inferred from the claim text.