Suspension-system degradation detection
AssigneeFord Global Technologies, LLC
InventorsLodewijk Wijffels, Devon Eyerman, Joshua Guerra, Donald Bradfield, Ronald Loyd Chadwick
Life of this patent
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Abstract
A computer includes a processor and a memory storing processor-executable instructions. The processor is programmed to record steering-system torque in response to a difference between a detected steering angle and a requested steering angle exceeding an angle threshold, increment a counter based on the recorded steering-system torque, and set a repair indicator in response to the counter exceeding a counter threshold.
Claims14
A computer comprising a processor and a memory storing processor-executable instructions, the processor programmed to:
- start recording steering-system torque over time in response to a difference between a detected steering angle and a requested steering angle exceeding an angle threshold;
- stop recording the steering-system torque in response to the difference between the detected steering angle and the requested steering angle decreasing below the angle threshold;
- after stopping recording, calculate a road-impact energy for a period from starting recording to ending recording based on the steering-system torque over time;
- increment a counter based on the calculated road-impact energy;
- and
- output a flag in response to the counter exceeding a counter threshold.
A method comprising:
- starting recording steering-system torque over time in response to a difference between a detected steering angle and a requested steering angle exceeding an angle threshold;
- stopping recording the steering-system torque in response to the difference between the detected steering angle and the requested steering angle decreasing below the angle threshold;
- after stopping recording, calculating a road-impact energy for a period from starting recording to ending recording based on the steering-system torque over time;
- incrementing a counter based on the calculated road-impact energy;
- and
- outputting a flag in response to the counter exceeding a counter threshold.
Dependencies are inferred from the claim text.