Diagnostic systems and methods of a continuously variable transmission
AssigneePolaris Industries Inc.
InventorsJonathon P. Graus, Bruce E. Herrala
Life of this patent
Estimating the term…
Abstract
A diagnostic system of a vehicle for diagnosing a drive belt of a continuously variable transmission. A diagnostic circuit detects or predicts a fault of the drive belt based on an operating parameter received from a sensor associated with the vehicle during a predetermined diagnostic period.
Claims19
A vehicle diagnostic method of a vehicle including an internal combustion engine and a continuously variable transmission (CVT) operatively coupled to the internal combustion engine, the method comprising the steps of:
- determining an amount of input energy provided to the CVT by the internal combustion engine;
- determining an amount of output thermal energy leaving the CVT;
- determining based on the amount of input energy and the amount of output thermal energy an amount of accumulated energy in the CVT;
- comparing the amount of accumulated energy to a threshold;
- and
- altering the amount of input energy in response to the amount of accumulated energy satisfying the threshold.
A vehicle diagnostic method of a vehicle including an internal combustion engine and a continuously variable transmission (CVT) operatively coupled to the internal combustion engine, the method comprising the steps of:
- determining an amount of accumulated energy in the CVT;
- comparing the amount of accumulated energy to a threshold;
- and
- altering an amount of input energy provided to the CVT in response to the amount of accumulated energy satisfying the threshold.
A vehicle diagnostic method of a vehicle including an internal combustion engine and a continuously variable transmission (CVT) operatively coupled to the internal combustion engine, the method comprising the steps of:
- determining an amount of input energy provided to the CVT by the internal combustion engine;
- determining an amount of output thermal energy leaving the CVT;
- determining a difference between the amount of output thermal energy and the amount of input energy;
- comparing the difference to a first threshold;
- determining a temperature of a belt of the CVT;
- comparing the temperature of the belt to a second threshold;
- and
- altering the amount of input energy in response to at least one of the amount of accumulated energy satisfying the first threshold and the temperature of the belt satisfying the second threshold.
Dependencies are inferred from the claim text.