公开(公告)号：US20190084510A1

公开(公告)日：2019-03-21

申请号：US15707115

申请日：2017-09-18

Applicant: GM Global Technology Operations LLC

Inventor： Xinyu Du ,  Shengbing Jiang ,  Dongyi Zhou ,  David Gumpert ,  Atul Nagose ,  Rod Niner ,  Aaron D. Motyl

IPC: B60R16/03 ,  B60R21/01

CPC classification number: B60R16/0315 ,  B60R21/01 ,  B60R2021/0104 ,  B60R2021/01156 ,  B60R2021/01163

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.

公开(公告)号：US10800363B2

公开(公告)日：2020-10-13

申请号：US15707115

申请日：2017-09-18

Applicant: GM Global Technology Operations LLC

Inventor： Xinyu Du ,  Shengbing Jiang ,  Dongyi Zhou ,  David Gumpert ,  Atul Nagose ,  Rod Niner ,  Aaron D. Motyl

IPC: B60R16/03 ,  B60R21/01

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.