Fail operational power system diagnostics
First Claim
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1. Method for operating a diagnostic system of a vehicle including a fail operational power system (FOPS) module and a fail operational system (FOS) load, comprising:
- providing said FOPS module with first and second independent power sources, and first and second parallel power distribution paths, each power distribution path powered by one of said independent power sources;
providing said FOS load with first and second FOS modules, each FOS module respective to one of said first and second power distribution paths;
requesting, at the FOS modules, a microcontroller of the FOPS module to generate a diagnostic control signal;
receiving, at the FOS modules, diagnostic information from a component module of the FOPS module based on the diagnostic control signal generated by the microcontroller; and
executing, at the FOS modules, isolator diagnostics based on the received diagnostic information.
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Abstract
A method for operating a diagnostic system of a vehicle including a fail operational power system (FOPS) module and a fail operational system (FOS) module includes the FOS module requesting a microcontroller of the FOPS module to generate a diagnostic control signal. The FOS module receives the diagnostic information from a component module of the FOPS module based on the diagnostic control signal generated by the microcontroller. The FOS module executes isolator diagnostics based on the received diagnostic information.
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Citations
20 Claims
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1. Method for operating a diagnostic system of a vehicle including a fail operational power system (FOPS) module and a fail operational system (FOS) load, comprising:
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providing said FOPS module with first and second independent power sources, and first and second parallel power distribution paths, each power distribution path powered by one of said independent power sources; providing said FOS load with first and second FOS modules, each FOS module respective to one of said first and second power distribution paths; requesting, at the FOS modules, a microcontroller of the FOPS module to generate a diagnostic control signal; receiving, at the FOS modules, diagnostic information from a component module of the FOPS module based on the diagnostic control signal generated by the microcontroller; and executing, at the FOS modules, isolator diagnostics based on the received diagnostic information. - View Dependent Claims (2)
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3. Method for operating a diagnostic system of a vehicle including a fail operational power system (FOPS) module and a fail operational system (FOS) module, comprising:
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requesting, at the FOS module, a microcontroller of the FOPS module to generate a diagnostic control signal; receiving, at the FOS module, diagnostic information from a component module of the FOPS module based on the diagnostic control signal generated by the microcontroller; and executing, at the FOS module, isolator diagnostics based on the received diagnostic information; wherein the diagnostic information from the component module is received by the FOS module when the microcontroller; retrieves measured signals stored within the component module using the diagnostic control signal; extracts the diagnostic information from the measured signals; and transmits the diagnostic information to the FOS module; and wherein the diagnostic information received from the component module includes at least one of; energy signals from each of first and second independent power sources, each of the independent power sources supplying power via respective ones of first and second power distribution paths arranged in parallel to a load; a first voltage on the first power distribution path monitored by a first voltage detector and a second voltage on the second power distribution path monitored by a second voltage detector; and a diagnostic status of each of a plurality of switches, the plurality of switches including a first isolator switch effective when operative in a closed state to power the first power distribution path supplied by the first independent power source, a second isolator switch effective when operative in a closed state to power the second power distribution path supplied by the second independent power source, a third isolator switch effective when operative in a closed state to connect the first and second power distribution paths via a connector path, first and second snub switches configured to snub voltages over a predetermined level from load dumps when a predetermined operating mode requiring fail operational power is enabled, and a test load switch effective when operative in a closed state to apply a test load to the second independent power source. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An apparatus, comprising:
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a first power distribution path powered by a first energy storage device for supplying electrical power to loads partitioned on the first power distribution path; a second power distribution path parallel to the first power distribution path and powered by a second energy storage device for supplying electrical power to the loads partitioned on the second power distribution path; a first voltage detector configured to monitor a first voltage on the first power distribution path and determine one of a normal condition and an abnormal condition based on the first monitored voltage; a second voltage detector configured to monitor a second voltage on the second power distribution path and determine one of a normal condition and an abnormal condition based on the second monitored voltage; a first isolator switch effective when operative in a closed state to power the first power distribution path by the first energy storage device for supplying electrical power to the loads; a second isolator switch effective when operative in a closed state to power the second power distribution path by the second energy storage device for supplying electrical power to the loads; a third isolator switch configured to connect the first and second parallel power distribution paths via a connector path when the isolator switch is operative in a closed state when the normal condition is detected by both of the first and second voltage detectors, and open the connection between the first and second power distribution paths when at least one of the first and second voltage detectors detects the abnormal condition; a plurality of voltage clamp circuits, each voltage clamp circuit connected to and monitoring respective ones of the first and second power distribution paths, each voltage clamp circuit limiting a maximum voltage transient on the respective power distribution path to a predetermined magnitude; a fail operational power system (FOPS) module comprising a component module configured to store diagnostic information, and a microcontroller configured to generate a diagnostic control signal sent to the component module and receive the diagnostic information from the component module; and a fail operational system (FOS) module including non-volatile memory, the FOS module configured to receive the diagnostic information transmitted from the microcontroller, and request the microcontroller to execute isolator diagnostics based on the received diagnostic information. - View Dependent Claims (19, 20)
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Specification