METHOD AND APPARATUS FOR ON-BOARD/OFF-BOARD FAULT DETECTION
First Claim
Patent Images
1. A method for monitoring a subsystem for a vehicle during ongoing operation, comprising:
- monitoring states of commanded and observed parameters for the subsystem;
determining deviations in the observed parameters off-board the vehicle;
employing the deviations to determine magnitudes of subsystem operating signatures off-board the vehicle;
employing the subsystem operating signatures to identify presence of a subsystem fault and isolate the subsystem fault off-board the vehicle; and
communicating the presence of the isolated fault to the vehicle.
1 Assignment
0 Petitions
Accused Products
Abstract
A vehicle includes a plurality of subsystems that are monitored during on-going operation. A method for monitoring a subsystem includes monitoring states of commanded and observed parameters for the subsystem. Deviations in the observed parameters are determined off-board the vehicle. The deviations are employed to determine magnitudes of subsystem operating signatures off-board the vehicle. The subsystem operating signatures are employed to identify presence of a subsystem fault and isolate the subsystem fault off-board the vehicle. The presence of the isolated fault is communicated to the vehicle.
-
Citations
19 Claims
-
1. A method for monitoring a subsystem for a vehicle during ongoing operation, comprising:
-
monitoring states of commanded and observed parameters for the subsystem; determining deviations in the observed parameters off-board the vehicle; employing the deviations to determine magnitudes of subsystem operating signatures off-board the vehicle; employing the subsystem operating signatures to identify presence of a subsystem fault and isolate the subsystem fault off-board the vehicle; and communicating the presence of the isolated fault to the vehicle. - View Dependent Claims (2, 3, 4)
-
-
5. A method for monitoring a subsystem for a vehicle, comprising:
-
monitoring states of commanded parameters and observed parameters for the subsystem on board the vehicle during ongoing operation; transmitting the commanded parameters and the observed parameters for the subsystem to a subsystem monitoring system remote from the vehicle; employing the subsystem monitoring system to; execute a system model to determine expected states for the observed parameters based upon the commanded parameters, determine deviations in the observed parameters based upon comparisons of the expected states and the monitored states for the observed parameters, determine magnitudes of subsystem operating signatures based upon the deviations in the observed parameters, identify presence of a subsystem fault and isolate the subsystem fault based upon the subsystem operating signatures, and communicate the presence of the isolated fault to the vehicle. - View Dependent Claims (6, 7, 8)
-
-
9. A method for monitoring a returnless fuel subsystem for a vehicle, comprising:
-
monitoring commanded and observed parameters of the returnless fuel subsystem on-board the vehicle during vehicle operation; determining deviations in the observed parameters off-board the vehicle; employing the deviations to determine magnitudes of the returnless fuel subsystem operating signatures off-board the vehicle; employing the operating signatures to identify and isolate a fault in the returnless fuel subsystem the subsystem fault off-board the vehicle; and communicating the fault in the returnless fuel subsystem to the vehicle. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
Specification