Engine coolant temperature estimation system
AssigneeGM Global Technology Operations LLC
InventorsWajdi B. Hamama, Jon C. Miller, Igor Anilovich, John W. Siekkinen, Steven J. Shepherd, Robert S. Wickman, Roberto De Paula
Life of this patent
Estimating the term…
Abstract
An engine coolant temperature estimation system comprises a coolant temperature estimation module and a coolant monitoring module. The coolant estimation module estimates an engine coolant temperature based on at least one of a mass air flow, a vehicle speed, and an ambient temperature. The coolant monitoring module selectively operates an engine based on the estimated engine coolant temperature.
Claims13
An engine coolant temperature estimation system for a vehicle, comprising:
- a coolant temperature estimation module that estimates an engine coolant temperature i) based on mass air flow, vehicle speed, and ambient temperature when an engine is on, and ii) based on vehicle speed, ambient temperature, and engine off time when the engine is off and the vehicle is moving;
- and
- a coolant monitoring module that selectively operates the engine based on the estimated engine coolant temperature.
An engine coolant temperature estimation method for a vehicle, comprising:
- estimating an engine coolant temperature based on a mass air flow, a vehicle speed, and an ambient temperature;
- estimating an engine coolant temperature based on mass air flow, vehicle speed, and ambient temperature when an engine is on;
- estimating the engine coolant temperature based on engine off time, vehicle speed, and ambient temperature when the engine is off and the vehicle is moving;
- and
- selectively operating the engine based on the estimated engine coolant temperature.
Dependencies are inferred from the claim text.