Method and system for increasing engine braking
AssigneeFord Global Technologies, LLC
InventorJavier Castellano
Life of this patent
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Abstract
A method of increasing engine braking of an engine for a vehicle, the method including: determining the change in kinetic energy of the vehicle over a period; determining the energy output from a drivetrain of the vehicle over the period; comparing the change in kinetic energy to the energy output; and increasing the engine braking of the vehicle when the change in kinetic energy is greater than the energy output over the period.
Claims18
A method of increasing engine braking of an engine for a vehicle, the method comprising:
- determining a change in kinetic energy of the vehicle over a period;
- determining an energy output from a drivetrain of the vehicle over the period;
- comparing the change in kinetic energy to the energy output;
- increasing engine braking of the vehicle when the change in kinetic energy is greater than the energy output over the period;
- determining an energy input into a brake system of the vehicle;
- and
- increasing the engine braking of the vehicle when a temperature of the brake system is greater than a predetermined temperature.
A method of increasing powertrain braking comprising:
- determining a change in kinetic energy of a vehicle over a period;
- determining an energy output from a powertrain of the vehicle over the period;
- comparing the change in kinetic energy to the energy output;
- and
- increasing powertrain braking of the vehicle, by activating an electric machine of the powertrain, when the change in kinetic energy is greater than the energy output over the period.
A system for increasing engine braking of an engine for a vehicle, the system comprising a controller configured to:
- determine a change in kinetic energy of the vehicle over a period;
- determine an energy output from a drivetrain of the vehicle over the period;
- compare the change in kinetic energy to the energy output;
- increase engine braking of the vehicle when the change in kinetic energy is greater than the energy output over the period;
- determining an energy input into a brake system of the vehicle;
- and
- increasing the engine braking of the vehicle when a temperature of the brake system is greater than a predetermined temperature.
Dependencies are inferred from the claim text.