Rough road detection
AssigneeGM Global Technology Operations LLC
InventorsDominique Robert, Herve Scelers, Pascal Tissot
Life of this patent
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Abstract
A rough road detection system for a vehicle comprises a first acceleration sensor that measures vertical acceleration of a component of the vehicle. An adaptive acceleration limits module determines a first acceleration limit based upon a speed of the vehicle. A limit comparison module generates a rough road signal based on a comparison of the first acceleration limit from the adaptive acceleration limits module and the measured acceleration from the first acceleration sensor.
Claims28
A rough road detection system for a vehicle comprising:
- a first acceleration sensor that measures vertical acceleration of a component of the vehicle;
- an adaptive acceleration limits module that determines a first acceleration limit based upon a speed of the vehicle;
- and
- a limit comparison module that generates a rough road signal based on a comparison of the first acceleration limit from the adaptive acceleration limits module and the measured acceleration from the first acceleration sensor.
A vibration-sensitive powertrain adjustment system for a vehicle comprising:
- an acceleration sensor that measures vertical acceleration of a component of the vehicle;
- a rough road detection system that analyzes the measured acceleration and generates a road condition signal;
- a control module that generates an operating parameter adjustment signal based upon a speed of the vehicle and the road condition signal;
- and
- a vibration-sensitive system that adjusts an operating parameter based on the operating parameter adjustment signal.
A road condition aware control system for a continuously variable transmission (CVT) comprising:
- a first acceleration sensor that measures vertical acceleration of a component of the vehicle;
- an adaptive acceleration limits module that determines a first acceleration limit based upon a speed of the vehicle;
- a limit comparison module that compares the first acceleration limit from the acceleration limits module with the measured acceleration from the first acceleration sensor,
- wherein the limit comparison module outputs a rough road signal if the measured acceleration is outside of the first acceleration limit;
- a pressure offset module that determines and outputs a pressure offset;
- and
- a line pressure module that increases clamping pressure on a belt of the CVT by the pressure offset received from the pressure offset module when the rough road signal is received from the limit comparison module.
Dependencies are inferred from the claim text.