Regulated voltage control override
View Patent ↗Apparatus and methods are provided for controlling a voltage output of an alternator having a regulated voltage control (RVC). The apparatus includes a processor configured to transmit one of at least two control signals and a switch coupled to the processor and configured to select one of the control signals. One of the control signals is an RVC enable signal, and another control signal is a voltage boost signal. The method includes determining whether RVC requires override, selecting an output voltage mode of the alternator, activating a boosted voltage mode of the alternator by disabling RVC when RVC requires override, and activating an RVC mode by enabling RVC when the RVC does not require override or upon an occurrence of a lapse of a pre-determined amount of time.
1. An apparatus for placing an alternator having a regulated voltage control (RVC) into a desired operating mode, said apparatus comprising:
a switch having a first position and a second position each corresponding to one of the operating modes of the alternator, said switch configured to activate/deactivate a towing/hauling powertrain mode; and
a processor coupled to said switch and configured to transmit a control signal to the alternator based upon said position of said switch, wherein said control signal is selected from an RVC enable signal and a voltage boost signal to thereby place the alternator into the desired operating mode.
2. An apparatus according to claim 1 , wherein said control signal is selected from:
an RVC mode signal, said RVC mode signal enabling RVC of the alternator;
a tow/haul with boost mode signal, said tow/haul with boost mode signal disabling RVC of the alternator and boosting voltage output of the alternator; and
a tow/haul without boost mode signal, said tow/haul without boost mode signal enabling RVC of the alternator without boosting voltage output of the alternator.
3. An apparatus according to claim 1 , wherein said control signal is selected from:
an RVC mode signal enabling RVC of the alternator;
a tow/haul with boost mode signal disabling RVC of the alternator and boosting voltage output of the alternator;
a tow/haul without boost mode signal enabling RVC of the alternator without boosting voltage output of the alternator; and
a disable RVC with boost mode signal disabling RVC of the alternator and boosting voltage output of the alternator.
4. An apparatus according to claim 2 , wherein said processor comprises an input for receiving an input signal from said switch; and wherein said switch comprises three states corresponding to said RVC mode signal, said tow/haul with boost mode signal, and said tow/haul without boost mode signal.
5. An apparatus according to claim 2 , wherein said switch comprises:
a first output coupled to said processor, said first output transmitting one of an ON state and an OFF state; and
a second output coupled to said processor, said second output transmitting one of an ON state and an OFF state;
wherein said processor is configured to transmit one of said RVC mode signal, said tow/haul with boost mode signal, and said tow/haul without boost mode signal depending on said first output of said switch and said second output of said switch.
6. A voltage regulation system for a vehicle having a battery and an alternator, said system comprising:
a processor comprising at least two states, a first state corresponding to an RVC enable and a second stare corresponding to a voltage boost;
a powertrain control module coupled to said processor, said powertrain control module configured to output a first signal to the alternator based on one of said at least two states, said first signal selected from at least an RVC enable signal and a voltage boost signal; and
a switch coupled to said processor for selecting one of said at least two states.
7. A system according to claim 6 further comprising a second control module coupled with said processor and said PCM, said second control module configured to receive one of said at least two states from said processor and transmit a second signal to said PCM, said PCM selecting said first signal based on said second signal from said second control module.
8. A system according to claim 7 , wherein said second control module is selected from a body control module (BCM) and an engine control module (ECM).
9. A system according to claim 6 , wherein said switch is a tow/haul switch configured to activate/deactivate a towing/hauling powertrain mode.
10. A system according to claim 9 , wherein said at least two states comprises
a normal RVC mode enabling RVC of the alternator;
a tow/haul with boost mode activating said towing/hauling powertrain mode and disabling RVC of the alternator and boosting voltage output of the alternator; and
a tow/haul without boost mode activating said towing/hauling powertrain mode and enabling RVC of the alternator without boosting voltage output of the alternator.
11. A system according to claim 10 , wherein said switch comprises three states corresponding to one said normal RVC mode, said tow/haul with boost mode, and said tow/haul without boost mode.
12. A system according to claim 10 , wherein said switch comprises two outputs coupled to said processor, each of said two outputs transmitting one of an ON state and an OFF state; and wherein said processor is configured to transmit one of said normal RVC mode, said tow/haul with boost mode, and said tow/haul without boost mode depending on said state transmitted from each of said two outputs of said switch.
13. A system according to claim 10 , wherein said first signal is selected from an enable RVC signal, a tow/haul with boost signal, a tow/haul without boost signal, said enable RVC signal corresponding to said enable RVC mode, said tow/haul with boost signal corresponding to said tow/haul with boost mode, and said tow/haul without boost signal corresponding to said tow/haul without boost mode.
14. A method for boosting voltage output from an alternator having regulated voltage control (RVC), said method comprising the steps of:
activating and deactivating a tow/haul operation mode;
determining whether RVC of the alternator requires override;
activating an override RVC mode of the alternator by disabling RVC when RVC requires override; and
activating an RVC mode by enabling RVC when the RVC does not require override or upon a lapse of a pre-determined amount of time.
15. A method according to claim 14 , wherein said determining step comprises detecting a reduced current output from the main battery.
16. A method according to claim 14 , wherein said determining step comprises connecting an auxiliary battery requiring charge to the main battery.
17. A method according to claim 14 , wherein said override mode activating step comprises:
disabling RVC and boosting voltage from the alternator upon selection of a tow/haul boosted voltage mode;
disabling RVC with no voltage boost of the alternator upon selection of a tow/haul non-boosted voltage mode.