Trailing Vehicle Traction Control Disconnect Device
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Solution Overview
Problem
Work vehicles face decreased traction when pulling or towing trailing vehicles due to demanding situations such as weight and terrain conditions, leading to potential overspeed conditions that can strain the electric machines and ground engaging apparatuses.
Innovation Solution
A traction control system with a disconnect device, such as a clutch, is implemented between the electric machine and the ground engaging apparatus, equipped with speed sensors to measure differential speed and a controller that determines when to disengage the device based on exceeding speed thresholds, preventing overspeed conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electric machine remains connected to the ground engaging apparatus during high-speed operation, then continuous power transmission is maintained, but overspeed conditions cause strain and potential damage to the electric machine and apparatus
Solution Approach 1:
The power transmission system is segmented into two separable parts: the electric machine and the ground engaging apparatus, with a disconnect device (clutch) positioned between them. This segmentation allows the system to maintain connection during normal operation for continuous power transmission, while enabling separation during overspeed conditions to prevent damage, thus resolving the contradiction between reliability and device complexity
Solution Approach 2:
A disconnect device (clutch) is introduced as an intermediary component between the electric machine and the ground engaging apparatus. This mediator can engage to transmit power continuously during normal operation, and disengage during overspeed conditions to protect the electric machine, thereby maintaining reliability while managing the added complexity through a controlled intermediate element
2Reliability
If the disconnect device disengages during overspeed conditions, then the electric machine is protected from strain, but power transmission is interrupted
Solution Approach 1:
The disconnect device is designed with dynamic engagement and disengagement capabilities, allowing the system to adapt its power transmission state based on operating conditions. During normal operation, the device remains engaged for continuous power transmission (high productivity). During overspeed conditions, it dynamically disengages to protect the electric machine (high reliability), then can re-engage when conditions normalize, thus resolving the contradiction between reliability and productivity through dynamic adaptation
Data Source
AI summary
A traction control system for a trailing vehicle includes an electric machine, a ground engaging apparatus in contact with a ground surface, and a disconnect device connected between the electric machine and the ground engaging apparatus. The traction control system includes one or more speed sensors to determine a differential speed of the disconnect device. The traction control system includes a controller determines when to disengage the disconnect device based in part upon the speed of the ground engaging apparatus exceeding an upper threshold.