System and method for controlling activation of a power source of a hybrid electric vehicle
AssigneeFord Motor Company
InventorsDavid Brigham, Brandon Masterson, Mark Yamazaki, Kathleen Bailey
Life of this patent
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Abstract
A system and method of controlling activation of a power source of a hybrid electric vehicle. The method includes determining a vehicle speed, determining an operating state of a brake system, and controlling activation of the power source based on at least one of the vehicle speed and the operating state of the brake system.
Claims19
A method of controlling activation of a power source of a hybrid electric vehicle having primary and secondary power sources and a brake system, the method comprising:
- determining a vehicle speed;
- determining an operating state of the brake system;
- activating the primary power source when (1) the vehicle speed is less than a first threshold value and the brake system is in a released condition, or (2) the vehicle speed exceeds a second threshold value, or (3) a third threshold value has been exceeded;
- and
- deactivating the primary power source when the vehicle speed value is less than the first threshold value and the brake system is not in the released condition.
A system for controlling activation of a power source of a hybrid electric vehicle, the system comprising:
- primary and secondary power sources;
- a brake system for braking a vehicle wheel;
- a brake signal;
- an acceleration request signal;
- a vehicle speed signal;
- a wheel drive signal indicative of at least one of a target torque value and a target power value;
- and
- a control system that activates the primary power source when (1) the vehicle speed signal is less than a first threshold value and the brake signal indicates that brake actuation is not requested, or (2) the vehicle speed signal exceeds a second threshold value, or (3) the acceleration request signal is indicative of a vehicle acceleration request and the wheel drive signal exceeds a torque threshold value and/or a power threshold value;
- and
- the control system deactivates the primary power source when the vehicle speed signal is less than the first threshold value and the brake signal indicates that brake actuation is requested.
Dependencies are inferred from the claim text.