Detection of ECU ground fault with can bus voltage measurements

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United States of America Patent

PATENT NO 9989575
APP PUB NO 20160320441A1
SERIAL NO

14837641

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Abstract

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A method is disclosed for detecting ground faults in a communications system. The method includes measuring a predetermined number of voltage points; determining if the measured voltage points represent recessive or dominant bits; identifying which of the predetermined number of voltage points represent inter-frame bits and which represent frame data bits based on whether the measured voltage points are recessive or dominant; calculating a maximum average voltage for the inter-frame bits; calculating an average frame voltage for all dominant bits within a frame; determining a high average dominant voltage count based on a number of frames for which the average frame voltage is greater than a high voltage threshold; and determining if a ground fault exists based on the average frame voltage and the high average dominant voltage count.

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Patent Owner(s)

Patent OwnerAddress
GM GLOBAL TECHNOLOGY OPERATIONS LLCP O BOX 300 MAIL CODE 482-C24-A68 DETROIT MI 48265-3000

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bloom, Aaron B Sterling Heights, US 13 26
Du, Xinyu Oakland Township, US 91 509
Gumpert, David B Farmington Hills, US 3 18
Jiang, Shengbing Rochester Hills, US 61 538
Nagose, Atul Royal Oak, US 9 71
Niner, Rod Royal Oak, US 7 115

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