System and method for reducing engine temperature
AssigneeFord Global Technologies, LLC
InventorsDouglas Raymond Martin, John Eric Rollinger, Julia Helen Buckland Seeds, Joseph Lyle Thomas, Joshua Schumaker, John Erik Mikael Hellstrom, Adam J. Richards
Life of this patent
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Abstract
Systems and methods for cooling an internal combustion engine via flowing air through the internal combustion engine during select conditions are presented. In one example, lift of intake and/or exhaust poppet valves may be adjusted as a function of engine temperature. In addition, opening and closing timings of intake and exhaust poppet valves may be adjusted as a function of engine temperature.
Claims20
An engine control method, comprising:
- deactivating an engine cylinder of an engine in response to an engine temperature exceeding a threshold temperature;
- and
- adjusting an amount of lift of an intake valve of the engine cylinder while it is deactivated and flowing air through the engine cylinder while it is deactivated in response to the engine temperature exceeding the threshold temperature.
An engine system, comprising:
- an engine including a cylinder, the cylinder including a variable lift and timing poppet valve;
- and
- a controller including executable instructions stored in non-transitory memory that cause the controller to deactivate the cylinder and adjust an amount of lift of the variable lift and timing poppet valve to a non-zero lift amount that varies with a temperature of the engine, while the cylinder is deactivated, in response to the temperature of the engine exceeding a threshold temperature.
An engine control method, comprising:
- deactivating one or more cylinders of a plurality of cylinders of an engine in response to an engine temperature exceeding a threshold temperature;
- adjusting which of the plurality of cylinders is deactivated while the engine temperature exceeds the threshold temperature;
- and
- adjusting air flow through the deactivated one or more cylinders as a function of the engine temperature via adjusting an amount of valve lift of intake valves of the deactivated one or more cylinders to a non-zero value.
Dependencies are inferred from the claim text.