CVT Drive Belt Diagnostics for Slip and Life Event Detection

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

Conventional CVT drive belts tend to wear out prematurely due to improper break-in or excessive use under undesirable conditions, leading to slippage and damage, which can result in costly and time-consuming repairs.

Innovation Solution

A diagnostic system that monitors operating parameters and detects potential faults in the CVT drive belt using sensors and algorithms, providing real-time alerts and adjustments to prevent damage, thereby extending engine operational time and reducing maintenance costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the drive belt is used excessively under undesirable conditions, then the productivity and power transmission capability are maintained, but the reliability and service life of the drive belt deteriorate prematurely

Engineering Contradiction:
Improvepower transmission capabilityVSAvoiddrive belt service life
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The diagnostic system performs preliminary monitoring of drive belt conditions through sensors that detect vibration, temperature, and operational parameters before actual failure occurs. The system proactively identifies degradation trends and predicts remaining service life, allowing maintenance to be scheduled before the belt fails, thus preventing premature loss of reliability while maintaining productivity throughout the belt's actual service life.

Inventive Principle:
Principle #10Preliminary action

2Power

If the drive belt operates under high-load conditions, then the power transmission is maintained, but the drive belt temperature rises rapidly causing spin-burn damage

Engineering Contradiction:
Improvepower transmissionVSAvoiddrive belt temperature
Core Design Contradiction:
PowerVSTemperature

Solution Approach 1:

The diagnostic system implements continuous feedback monitoring of drive belt temperature through embedded sensors. When temperature approaches critical thresholds during high-load operation, the system provides real-time feedback signals that can trigger warnings to the operator or automatically reduce engine power output, preventing the temperature from reaching levels that cause spin-burn damage while allowing the system to operate at high power within safe temperature limits.

Inventive Principle:
Principle #23Feedback

3Loss of time

If the drive belt is not broken in properly, then the initial setup time is reduced, but the drive belt wears out and becomes damaged prematurely

Engineering Contradiction:
Improvebreak-in timeVSAvoiddrive belt durability
Core Design Contradiction:
Loss of timeVSReliability

Solution Approach 1:

The diagnostic system replaces the traditional mechanical break-in process with electronic monitoring and control. Instead of requiring extended periods of controlled mechanical operation to seat the belt properly, the system uses sensors to detect and monitor belt positioning, tension, and engagement characteristics, providing electronic feedback that confirms proper installation and guides initial operation, thereby eliminating the need for time-consuming mechanical break-in procedures while ensuring proper belt seating for long-term durability.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS12118835B2Diagnostic systems and methods of a continuously variable transmission
Publication Date: 2024.10.15 POLARIS IND INC
  • US12118835B2 patent drawing
  • US12118835B2 patent drawing
  • US12118835B2 patent drawing

AI summary

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.