Vehicle Drive Power Controller for Wheel Slippage Management
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Solution Overview
Problem
Existing vehicle control systems struggle to balance reducing wheel slippage by decreasing rimpull while ensuring sufficient power for operations like climbing inclines or pushing materials, as conventional methods either lead to insufficient traction or excessive slippage.
Innovation Solution
A controller that determines drive power to a vehicle's wheel based on a torque setting and vehicle speed, adjusting hydrostatic transmission pressure to maintain adequate power for low-speed, high-power operations while minimizing slippage at higher speeds by using customizable torque settings and dynamic curve profiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If torque is reduced to decrease rimpull and prevent wheel slippage, then wheel slippage is reduced, but insufficient power is available for operations like climbing steep inclines or pushing materials
Solution Approach 1:
The control system dynamically adjusts the drive power curve based on detected wheel slippage conditions. When slippage is detected, the system modifies the torque-speed curve in real-time to reduce rimpull and prevent further slippage. When slippage is absent, the system restores full power availability for operations like climbing or pushing materials, making the power delivery adaptive rather than static.
Solution Approach 2:
The system changes the torque-speed curve parameters based on operating conditions. By detecting wheel slippage and adjusting the curve shape and position, the system varies the rimpull characteristics to match current needs - reducing torque at low speeds when slippage occurs while maintaining power availability at higher speeds or when full power is required for operations.
2Object-affected harmful factors
If a fixed torque reduction setting is applied to prevent wheel slippage, then wheel slippage is reduced, but the vehicle cannot perform low-speed, high-power operations effectively
Solution Approach 1:
Rather than using a fixed torque reduction setting, the system dynamically generates and adjusts drive power curves based on real-time detection of wheel slippage. This allows the control characteristics to adapt to current operating conditions, providing torque reduction when needed to prevent slippage while maintaining full adaptability for different operations when slippage is not occurring.
Solution Approach 2:
The system uses feedback from wheel slippage detection to automatically adjust the drive power curve. When slippage is detected, the feedback triggers curve modification to reduce rimpull. When slippage stops, the feedback allows the system to restore full power availability. This closed-loop control provides adaptability without requiring manual intervention or fixed settings.
3Object-affected harmful factors
If manual torque reduction is applied to reduce rimpull, then wheel slippage is reduced, but operator control complexity increases and response time is delayed
Solution Approach 1:
The control system performs self-adjustment by automatically detecting wheel slippage and modifying the drive power curve without operator intervention. The system monitors wheel rotation speeds, detects slippage conditions, and autonomously adjusts torque delivery to prevent slippage, eliminating the need for the operator to manually adjust settings or respond to slippage events.
Solution Approach 2:
The system uses real-time feedback from wheel speed sensors to detect slippage and automatically triggers control adjustments. This closed-loop feedback mechanism enables the system to respond immediately to slippage conditions without waiting for operator detection or input, simplifying operation while maintaining effective slippage control.
Data Source
AI summary
When the driving force between a driven wheel of a wheel and the surface on which the vehicle is travelling exceeds the available traction, wheel slippage may occur. Wheel slippage may result in a loss of control of the vehicle. The present disclosure may facilitate the control of drive power sent to a driven wheel of a vehicle from consideration of a torque setting and a speed of the vehicle.