System and method for selecting a shift schedule for a hybrid vehicle
AssigneeCaterpillar Inc.
InventorKyle P. HEWERDINE
Life of this patent
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Abstract
A system and method for selecting a shift schedule of a hybrid vehicle. The hybrid vehicle includes a hybrid powertrain having a motor-generator unit, a battery electrically connected to the motor-generator unit an engine, and a transmission engageably connected to the engine and the motor-generator unit. The hybrid vehicle also includes a controller for controlling the hybrid powertrain. Upon reaching a trigger speed, the controller is configured to select a shift schedule from a plurality of shift schedules, based on a state of charge of the battery.
Claims20
A hybrid vehicle, the hybrid vehicle comprising:
- a hybrid powertrain including:
- a motor-generator unit;
- a battery electrically connected to the motor-generator unit
- an engine;
- and
- a transmission engageably connected to the engine and the motor-generator unit, and
- a controller for controlling the hybrid powertrain,
- wherein, upon reaching a trigger speed, the controller is configured to select a shift schedule from a plurality of shift schedules, based on a state of charge of the battery.
A method of selecting a shift schedule for a hybrid vehicle, the method comprising the steps of:
- obtaining a trigger speed by the hybrid vehicle, the hybrid vehicle having a controller and a hybrid powertrain, wherein the hybrid powertrain includes:
- a motor-generator unit;
- a battery electrically connected to the motor-generator unit;
- an engine;
- and
- a transmission engageably connected to the engine and the motor-generator unit;
- and
- determining a state of charge of the battery;
- and
- selecting, upon obtaining the trigger speed, one of a plurality of shift schedules based on the state of charge of the battery.
A controller for a hybrid vehicle, the controller configured to:
- determine if the hybrid vehicle has obtained a trigger speed, the hybrid vehicle including:
- a motor-generator unit,
- a battery electrically connected to the motor-generator unit,
- an engine, and
- a transmission engageably connected to the engine and the motor-generator unit;
- determine a state of charge of the battery;
- and
- select, upon obtaining the trigger speed, one of a plurality of shift schedules based on the state of charge of the battery.
Dependencies are inferred from the claim text.