Electrical distribution system monitoring for electric and autonomous vehicles

Patent metadata

Field	Value
Publication number	US-11455844-B2
Application number	US-201916696153-A
Country	US
Kind code	B2
Filing date	Nov 26, 2019
Priority date	Nov 26, 2019
Publication date	Sep 27, 2022
Grant date	Sep 27, 2022

Abstract

The disclosed systems and methods monitor power distribution systems for autonomous and drive-by-wire vehicles. The system can monitor input voltage, current, and other power signals, and reporting the input voltages and currents to a diagnostic engine control unit (ECU). The ECU compares the power signals with real-time (or substantially real-time) waveforms associated with vibrations, acceleration, road bumps, and other phenomena normally encountered in on-road operation, and evaluates any determined correlation between inertial events (e.g., bumps or acceleration, etc.) and changes in the power signals. If the diagnostic ECU determines a correlation between the inertial waveform, the diagnostic ECU map perform mitigating steps, such as issuing a vehicle health warning, generate instructions that cause the vehicle to navigate to a service center, or perform other mitigating actions.

First claim

That which is claimed is:

1. A computer-implemented method, comprising:
receiving a voltage value from an engine control unit (ECU) in a power distribution system for a vehicle;
receiving a vehicle acceleration waveform indicative of an acceleration characteristic;
determining that the acceleration characteristic correlates with the voltage value, comprising:
determining a correlation coefficient value associated with the acceleration characteristic and the voltage value,
comparing the correlation coefficient value with a threshold value for correlation, and
determining the correlation associated with the acceleration characteristic and the voltage value when the correlation coefficient value exceeds the threshold value for correlation,
updating, based on determining that the correlation coefficient value exceeds the threshold value, a counter associated with the ECU; and

generating, based on determining that the acceleration characteristic correlates with the voltage value, a diagnostic trouble code (DTC) that indicates a fault in the power distribution system.

2. The computer-implemented method according to claim 1 , further comprising issuing instructions to navigate the vehicle to a repair facility using an autonomous vehicle control system.

3. The computer-implemented method according to claim 1 , further comprising:
receiving a current value from the ECU;
receiving a vehicle acceleration waveform indicative of an acceleration characteristic; and
determining that an acceleration characteristic correlates with the voltage value.

4. The computer-implemented method according to claim 1 , further comprising generating vehicle maintenance instructions that cause the vehicle to navigate to a maintenance facility.

5. The computer-implemented method according to claim 1 , wherein receiving the vehicle acceleration waveform comprises receiving the vehicle acceleration waveform from a Restraint Control Module (RCM).

6. A system, comprising:
a processor; and
a memory for storing executable instructions, the processor configured to execute the instructions to:
receive a voltage value from an engine control unit (ECU) in a power distribution system for a vehicle;
receive a vehicle acceleration waveform indicative of an acceleration characteristic;
determine that the acceleration characteristic correlates with the voltage value;
compare a correlation coefficient value with a threshold value for correlation;
determine the correlation associated with the acceleration characteristic and the voltage value when the correlation coefficient value exceeds the threshold value for correlation;
update, based on determining that the correlation coefficient value exceeds the threshold value, a counter associated with the ECU; and
generate, based on determining that the acceleration characteristic correlates with the voltage value, a diagnostic trouble code (DTC) that indicates a fault in the power distribution system.

7. The system according to claim 6 , further comprising issuing instructions to navigate the vehicle to a repair facility using an autonomous vehicle control system.

8. The system according to claim 6 , wherein the processor is further configured to execute the instructions to:
receive a current value from the ECU;
receive a vehicle acceleration waveform indicative of an acceleration characteristic; and
determine that an acceleration characteristic correlates with the voltage value.

9. The system according to claim 6 , wherein the processor is further configured to execute the instructions to:
generate vehicle maintenance instructions that cause the vehicle to navigate to a maintenance facility.

10. The system according to claim 6 , wherein the processor is further configured to execute the instructions to:
receive the vehicle acceleration waveform from a Restraint Control Module (RCM).

Assignees

• Ford Global Tech Llc

Inventors

• Alla Michael Awad
• Elhadeedy Ahmed
• Dagher Sami
• Celinske David

Classifications

• B60W30/20

  Reducing vibrations in the driveline · CPC title

• B60W60/00186

  related to the vehicle · CPC title

• B60W50/045

  Monitoring control system parameters · CPC title

• G07C5/0808 Primary

  Diagnosing performance data (testing of vehicles G01M17/00; testing of electrical installation on vehicles G01R31/005) · CPC title

• G07C5/0841

  Registering performance data (recording measured values G01D; information storage G11B) · CPC title