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US 8,505,296 B2Granted
Method for controlling engine temperature of an engine
AssigneeFord Global Technologies, LLC
InventorsBenjamin Carl Mukkala, Nathanael David Shaw, Jason Eugene Devries, Brian Michael O'Neil, Michael Joseph Giunta
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Abstract
A method for controlling engine temperature of an engine with a wide dynamic range is disclosed. In one example, the derivative of an engine temperature is assessed by a controller. The controller may adjust engine actuators to limit engine temperature in response to the derivative.
Claims12
A system for controlling an engine, comprising:
- a turbocharger;
- at least one adjustable camshaft;
- a direct injector for injecting fuel to at least a cylinder of said engine;
- an automatic transmission coupled to said engine;
- and
- a controller that operates said engine such that a rate of temperature change of said engine is less than a first amount when an engine temperature is less than a first threshold temperature, said controller operating said engine such that said rate of temperature change of said engine is less than or equal to a second amount when said engine temperature exceeds said first threshold temperature, and said second amount less than said first amount, said controller limiting boost of said turbocharger when said engine temperature exceeds said first threshold temperature, said controller adjusting a position of said at least one adjustable camshaft when said engine temperature exceeds said first threshold temperature, said controller adjusting the amount of fuel injected by said direct injector when said engine temperature exceeds said first threshold temperature, and said controller adjusting shifting of said automatic transmission when said engine temperature exceeds said first threshold temperature.
3 more elements
A system for an engine, comprising:
- a turbocharger;
- an adjustable camshaft;
- a direct injector;
- and
- a controller that limits an engine temperature rate of change to be less than a first amount when engine temperature is less than a first threshold, and limits the engine temperature rate of change to be less than a second amount, said second amount less than said first amount, when said engine temperature exceeds the first threshold.
2 more elements
Dependencies are inferred from the claim text.