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1.发明申请公开(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
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.
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公开(公告)号：US20190389446A1
公开(公告)日：2019-12-26
申请号：US16013203
申请日：2018-06-20
Applicant: GM Global Technology Operations LLC
Inventor： Xinyu Du , Dongyi Zhou , Mutasim A. Salman , Kevin A. Cansiani , Xiaoyu Huang , Wen-Chiao Lin
Abstract: A method of identifying a fault in a friction brake actuated by hydraulic brake pressure and configured to decelerate a vehicle road wheel includes detecting, via a first sensor, a vibration at the road wheel and communicating data indicative of the detected vibration to a controller. The method additionally includes detecting, via a second sensor, upon application of the hydraulic brake pressure, a hydraulic brake pressure variation and communicating data indicative of the detected hydraulic brake pressure variation. The method additionally includes comparing, via the controller, the data indicative of the detected vibration with a threshold vibration value and the data indicative of the detected hydraulic brake pressure variation with a threshold hydraulic brake pressure value. Furthermore, the method includes generating a sensory signal indicative of the brake fault when magnitudes of the detected vibration and the detected hydraulic brake pressure variation are greater than their respective threshold values.
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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
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.
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公开(公告)号：US11220251B2
公开(公告)日：2022-01-11
申请号：US16013203
申请日：2018-06-20
Applicant: GM Global Technology Operations LLC
Inventor： Xinyu Du , Dongyi Zhou , Mutasim A. Salman , Kevin A. Cansiani , Xiaoyu Huang , Wen-Chiao Lin
Abstract: A method of identifying a fault in a friction brake actuated by hydraulic brake pressure and configured to decelerate a vehicle road wheel includes detecting, via a first sensor, a vibration at the road wheel and communicating data indicative of the detected vibration to a controller. The method additionally includes detecting, via a second sensor, upon application of the hydraulic brake pressure, a hydraulic brake pressure variation and communicating data indicative of the detected hydraulic brake pressure variation. The method additionally includes comparing, via the controller, the data indicative of the detected vibration with a threshold vibration value and the data indicative of the detected hydraulic brake pressure variation with a threshold hydraulic brake pressure value. Furthermore, the method includes generating a sensory signal indicative of the brake fault when magnitudes of the detected vibration and the detected hydraulic brake pressure variation are greater than their respective threshold values.
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