The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 13, 2020
Filed:
Sep. 18, 2017
GM Global Technology Operations Llc, Detroit, MI (US);
Xinyu Du, Oakland Township, MI (US);
Shengbing Jiang, Rochester Hills, MI (US);
Dongyi Zhou, Sterling Heights, MI (US);
David Gumpert, Farmington Hills, MI (US);
Atul Nagose, Royal Oak, MI (US);
Rod Niner, Royal Oak, MI (US);
Aaron D. Motyl, Macomb Township, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A system includes control modules, a low-voltage communications bus, e.g., a CAN bus of a vehicle, a voltage sensor that measures a bus voltage and outputs 2.5-3.5 VDC high-data and 1.5-2.5 VDC low-data, and a host electronic control unit (ECU). The host ECU detects a recoverable fault using a data pattern in the bus voltage data when the data is outside of a calibrated range, and recalibrates the sensor. Recalibration may be by adjustment to a scaling factor and/or a bias value. Non-recoverable 'stuck-at-fault'-type or 'out-of-range'-type faults may be detected using the pattern, as may be a ground offset fault. A method includes measuring the bus voltage using the sensor, comparing the output data to a range to detect the fault, and isolating a sensor fault as a recoverable fault using the data pattern when the data is outside of the range. The sensor is then be recalibrated.