Diagnostic systems and methods of a continuously variable transmission
AssigneePolaris Industries Inc.
InventorsJonathon P. Graus, Bruce E. Herrala, Amery D. Kuhl, Karl J. Grajkowski
Life of this patent
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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.
Claims21
1-7. (canceled)
A method for estimating wear of a drive belt of a continuously variable transmission (CVT) provided in a vehicle, the method comprising:
- determining a first belt wear-affecting factor based on at least one CVT operating parameter of the vehicle;
- determining a second belt wear-affecting factor based on at least one engine operating parameter of the vehicle;
- applying the first and second wear-affecting factors to a belt life-representative parameter to obtain an adjusted belt life-representative parameter;
- and
- adjusting a total belt life-representative parameter based on the adjusted belt life-representative parameter to obtain an updated total belt life-representative parameter.
A method for estimating wear of a drive belt of a continuously variable transmission (CVT) provided in a vehicle, the method comprising:
- sensing a belt load-representative parameter of the vehicle;
- sensing a belt temperature-representative parameter of the vehicle;
- determining an estimated change in a belt life characteristic based upon the belt load-representative parameter and the belt temperature-representative parameter;
- adjusting an estimated total belt life characteristic based on the estimated change in belt life characteristic;
- comparing the updated estimated total belt life characteristic to a threshold belt life characteristic;
- and
- providing an indication of a need for maintenance on the vehicle when the updated estimated total belt life characteristic passes a threshold belt life.
A system, comprising:
- a processor;
- and
- a memory storing instructions that, when executed by the processor, causes the system to perform a set of operations, the set of operations comprising:
- sensing a belt load-representative parameter of the vehicle;
- sensing a belt temperature-representative parameter of the vehicle;
- determining an estimated change in a belt life characteristic based upon the belt load-representative parameter and the belt temperature-representative parameter;
- adjusting an estimated total belt life characteristic based on the estimated change in belt life characteristic;
- comparing the updated estimated total belt life characteristic to a threshold belt life characteristic;
- and
- providing an indication of a need for maintenance on the vehicle when the updated estimated total belt life characteristic passes a threshold belt life.
Dependencies are inferred from the claim text.