Systems and methods for probabilistic on-board diagnostics
AssigneeFord Global Technologies, LLC
InventorsCory Hendrickson, Michiel J. Van Nieuwstadt
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Abstract
Methods and systems are provided for probabilistic on-board diagnostics. In one example, a method may include calculating a probabilistic metric for a sample of a measured operating condition of a vehicle system component, averaging a plurality of probabilistic metrics including the probabilistic metric for a plurality of samples including the sample, and determining whether the vehicle system component is degraded based on the averaged plurality of probabilistic metrics. In this way, the functionality of a vehicle system component may be continuously monitored without regard for specific diagnostic entry conditions.
Claims5
A method for on-board diagnostics of a vehicle system component, comprising:
- a controller acquiring a sample of signals from a sensor, and the sensor generating the signals based on the operating conditions related to the vehicle system component;
- calculating a probabilistic metric for the acquired sample;
- calculating an average score from a plurality of probabilistic metrics including the probabilistic metric for a plurality of samples including the sample;
- responsive to the average score above a first threshold, indicating that the vehicle system component is nominal;
- responsive to the average score below a second threshold, the controller outputting an alert indicating that the vehicle system component is degraded;
- and
- responsive to the average score between the first threshold and the second threshold, discarding the average score.
Dependencies are inferred from the claim text.