Diagnostic systems and methods of a continuously variable transmission
AssigneePolaris Industries Inc.
InventorsJonathon P. Graus, Bruce E. Herrala, Amery D. Kuhl, Karl J. Grajkowski, Ryan D. Carlson, John F. Kallis
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.
Claims20
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, the at least one CVT operating parameter of the vehicle including a belt load-representative parameter;
- 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.