Caterpillar Inc.

Thomas J Bickel

Amanda J Wilke

Wendell Dean Stahl

Arick Matthew Bakken

Matthew A Tobben

David Louis Rottier

Andrew G Genseal

Md Nasir Uddin

Dane S Richards

Jennie L Nelson

Dwight D Lemke

Joseph A Willenborg

A redundancy system for a steering system having a primary controller and a primary power source is provided. The redundancy system may include a secondary controller coupled to a secondary power source and configured to manage control of the steering system, and an interface circuit disposed between at least a first node and a second node. The first node may be in electrical communication with the primary power source, and the second node may be in electrical communication with the secondary power source. The interface circuit may be configured to selectively engage a self-test of the primary power source and the secondary power source, isolate a short at the first node from the secondary power source, and isolate a short at the second node from the primary power source.

Managing steering with short from battery to ground

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.

System and method for reducing quiescent power draw and machine using same

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Lacon, IL, United States of America

Thomas J Bickel