Rough road detection
First Claim
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1. A road condition aware 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;
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 continuously variable transmission (CVT)that includes a belt having a tension adjustment; and
a control module that determines the tension adjustment on the belt in the CVT when the rough road signal is received from the limit comparison module.
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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.
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Citations
17 Claims
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1. A road condition aware system for a vehicle comprising:
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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 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 continuously variable transmission (CVT)that includes a belt having a tension adjustment; and a control module that determines the tension adjustment on the belt in the CVT when the rough road signal is received from the limit comparison module. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A vibration-sensitive powertrain adjustment system for a vehicle comprising:
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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, wherein the vibration-sensitive system is a continuously variable transmission (CVT) and the operating parameter is a tension on a belt within the CVT.
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10. A road condition aware control system for a continuously variable transmission (CVT) comprising:
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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. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification