System and method for reducing quiescent power draw and machine using same
First Claim
1. A machine, comprisinga plurality of electronic controllers electrically connected to an electrical power source along a first electrical circuit through a main power relay and along a second electrical circuit through a low current mode relay, and each of the electronic controllers including a processor, a memory and an input/output circuit in communication with another one of the electronic controllers, wherein electrical power provided along the second electrical circuit provides a current draw to the electronic controllers that is less than a current draw provided to the electronic controllers along the first electrical circuit;
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wherein the relay controller is configured to open and close the main power relay responsive to an ignition key switch being in an off position and an on position, respectively;
the relay controller is configured to open the low current mode relay a time period after the main power relay is opened, and configured to close the low current mode relay in response to the ignition key switch being in an on position, wherein the time period is selected to allow completion of procedures running on the electronic controllers.
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Accused Products
Abstract
A machine includes a plurality of electronic controllers electrically connected to an electrical power source along a first electrical circuit through a first relay and along a second electrical circuit through a second relay. A relay controller is directly connected to the electrical power source along a third electrical circuit, and is in communication with the first relay and the second relay. The relay controller is configured to open or close the first relay or the second relay in response to a power requirement indication.
36 Citations
15 Claims
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1. A machine, comprising
a plurality of electronic controllers electrically connected to an electrical power source along a first electrical circuit through a main power relay and along a second electrical circuit through a low current mode relay, and each of the electronic controllers including a processor, a memory and an input/output circuit in communication with another one of the electronic controllers, wherein electrical power provided along the second electrical circuit provides a current draw to the electronic controllers that is less than a current draw provided to the electronic controllers along the first electrical circuit; - and
a relay controller electrically connected to the electrical power source along a third electrical circuit, the relay controller being in communication with the main power relay and the low current mode relay; wherein the relay controller is configured to open and close the main power relay responsive to an ignition key switch being in an off position and an on position, respectively; the relay controller is configured to open the low current mode relay a time period after the main power relay is opened, and configured to close the low current mode relay in response to the ignition key switch being in an on position, wherein the time period is selected to allow completion of procedures running on the electronic controllers. - View Dependent Claims (2, 3, 4, 5, 6, 9, 10, 11, 12, 13)
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7. A method of operating a machine, comprising:
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supplying electrical power from an electrical power source directly to a relay controller, while a plurality of electronic controllers are electrically disconnected from the electrical power source to, at least partially, reduce a quiescent power draw when an ignition key switch is in an off position; receiving a power requirement indication; communicating a first activation command from the relay controller to a main power relay in response to the power requirement indication; closing the main power relay to electrically connect the electrical power source and the plurality of electronic controllers in response to the first activation command; communicating between the plurality of electronic controllers after the plurality of electronic controllers are connected to the electrical power source; communicating a second activation command from the relay controller to a low current mode relay in response to the power requirement indication; closing the low current mode relay to electrically connect the electrical power source and the plurality of electronic controllers through the low current mode relay in response to the second activation command; and providing a current draw to the electronic controllers along the second electrical circuit that is less than a current draw provided to the electronic controllers along the first electrical circuit. - View Dependent Claims (8)
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14. An electronic control system of a machine, comprising:
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a plurality of electronic controllers electrically connected to an electrical power source along a first electrical circuit through a main power relay and along a second electrical circuit through a low current mode relay, and each of the electronic controllers including a processor, a memory and an input/output circuit in communication with another one of the electronic controllers, wherein electrical power provided to the electronic controllers along the second electrical circuit provides a current draw that is less than a current draw provided to the electronic controllers along the first electrical, circuit; and a relay controller having a direct electrical connection to the electrical power source along a third electrical circuit and being electrically connected to the electrical power source along a fourth electrical circuit through an ignition key switch, the relay controller being in communication with the main power relay and the low current mode relay; wherein the relay controller is configured to close at least one of the main power relay and the low current mode relay in response to detection of either an on position of the ignition key switch or receipt of a wake up signal transmitted from a wake up component. - View Dependent Claims (15)
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Specification