Systems and methods for battery regeneration based on engine loading
AssigneeCummins Inc.
InventorsMartin T. Books, Vivek A. Sujan, Praveen C. Muralidhar
Life of this patent
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Abstract
An alternator voltage may be controlled based on a proportional gain scheduling in response to an engine load of an internal combustion engine and/or a state of charge (SOC) deviation for a battery based on a target SOC of the battery and an actual SOC of the battery. The alternator voltage may be a voltage less than a current battery voltage under high engine loads to enable the battery to power an accessory system and the alternator voltage may be a voltage greater than a voltage of the battery under low engine loads or engine loads less than high engine loads to enable the alternator to charge the battery.
Claims24
A method, comprising:
- determining an engine load of an internal combustion engine mechanically coupled to an alternator, wherein a battery is electrically coupled to the alternator;
- determining a state of charge (SOC) deviation for the battery based on a target SOC of the battery and an actual SOC of the battery;
- scheduling a proportional gain in response to at least one of the engine load and the SOC deviation;
- and
- providing, with a controller, an alternator voltage command to the alternator based on the proportional gain.
A system, comprising:
- a start-stop vehicle including an internal combustion engine mechanically coupled to an alternator, an electrical energy storage device electrically coupled to the alternator, and a controller in electrical communication with the internal combustion engine, the alternator, the electrical energy storage device, and one or more vehicle sensors operable to provide signals indicating conditions of the start-stop vehicle,
- wherein the controller is structured to:
- interpret an engine load of the internal combustion engine;
- determine a state of charge (SOC) error of the battery based on a target SOC of the battery and an actual SOC of the battery;
- determine a proportional gain as a function of at least one of the engine load and the SOC error;
- and
- provide an alternator voltage command to the alternator based on the proportional gain.
An apparatus, comprising:
- an electronic controller in operative communication with a plurality of sensors operable to provide signals indicating conditions of a system, the system including an engine, an alternator operationally coupled to the engine, and a battery electrically coupled to the alternator, wherein the electronic controller includes:
- a state of charge (SOC) error determination module structured to determine a SOC error of the battery;
- a gain scheduling module structured to determine a proportional gain in response to an engine load and the SOC error;
- and
- an alternator voltage control module structured to provide the alternator with an alternator voltage command based on the proportional gain.
Dependencies are inferred from the claim text.