Fault isolation using on-board diagnostic (OBD) capability data

US11798325B2 · kind B2 · utility

Assignee

• Cummins Inc. · US

Inventors

• Jeffrey Diwakar Abraham · Columbus, US
• Marcela Schmalz de Bernardi · Columbus, US
• Avra Brahma · Fishers, US
• Timothy J. Greis · Columbus, US
• Michael Haas · Columbus, US
• Gregory H. Henderson · Columbus, US
• Adam W. Kidd · Indianapolis, US
• Lyle E. Kocher · Whiteland, US
• Krithika Mohan · Columbus, US
• Daniel J. Smith · La Habra, US
• Christophe Tricaud · Columbus, US
• Ananth Vemuri · Columbus, US
• Easwar Yarrabikki · Columbus, US

Key dates

• Filing date: Dec 9, 2020
• Grant date: Oct 24, 2023
• Expiry date: Dec 24, 2041

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A system includes a controller configured to store a relationship matrix of a plurality of diagnostic estimators and a plurality of failure modes, each failure mode represents a type of failure that can occur with (i) a sensor or (ii) a vehicle component of a vehicle system, each diagnostic estimator is associated with a respective subset of the failure modes, each respective subset defines a control volume within the vehicle system that contains at least one of (i) one or more sensors or (ii) one or more vehicle components; store a healthy diagnostic vector regarding nominal operational parameters of the vehicle system; acquire diagnostic information regarding current operational parameters of the vehicle system to generate an error diagnostic vector; divide the error diagnostic vector by the healthy diagnostic vector to generate a ratio diagnostic vector; multiply the ratio diagnostic vector with the relationship matrix to generate a value for each failure mode.