Vehicle Power Distribution Control via Road Surface Recognition
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Solution Overview
Problem
Traditional four-wheel drive vehicles face difficulties in maintaining optimal power distribution on diverse road surfaces such as urban roads, snow, mud, or sand, leading to suboptimal performance.
Innovation Solution
A vehicle power distribution control method and system that recognizes the current road surface type through image analysis, switches the center differential to a corresponding locking mode, and distributes torque to the front and rear axles based on pre-defined torque distribution curves for different terrain modes, including common, snow, mud, and sand modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional four-wheel drive power distribution is used, then the vehicle can maintain basic drive capability, but it cannot adapt to different road surface conditions (urban roads, snow, mud, sand)
Solution Approach 1:
The patent applies dynamics by making the power distribution system adjustable and adaptive rather than fixed. The control unit dynamically adjusts the torque distribution between front and rear axles based on detected road surface conditions, switching between different power distribution strategies (e.g., 50:50 for urban roads, biased distribution for snow/mud/sand) to optimize performance for each terrain type.
Solution Approach 2:
The patent changes the power distribution parameters (torque ratio between axles) based on road surface conditions. By detecting terrain type and adjusting the torque distribution parameters accordingly, the system achieves adaptability across different surfaces while maintaining reliable drive capability through optimized parameter selection for each condition.
2Adaptability or versatility
If fixed power distribution strategy is used, then the control system is simple, but it cannot optimize torque distribution for varying terrain conditions
Solution Approach 1:
The patent implements feedback by using a control unit that detects road surface conditions and uses this information to adjust power distribution strategies in real-time. The system continuously monitors terrain type and feeds this information back to modify torque distribution, achieving adaptability while keeping the control architecture relatively simple through sensor-based feedback loops.
Solution Approach 2:
The control unit serves multiple functions: it detects road surface conditions, identifies terrain type, selects appropriate power distribution strategies, and controls torque distribution to front and rear axles. This multi-functionality allows the system to achieve terrain adaptability without requiring separate dedicated systems for each function, thereby managing complexity.
3Reliability
If road surface recognition is added, then terrain-specific power distribution can be achieved, but the system complexity increases
Solution Approach 1:
The patent replaces complex mechanical road surface sensing mechanisms with a control unit that detects road surface conditions through electronic sensors and signal processing. This substitution achieves accurate terrain recognition and reliable power distribution control while minimizing mechanical complexity through electronic and software-based solutions.
Data Source
AI summary
A vehicle power distribution control method, apparatus and system are provided. The method includes: acquiring an image of a road surface on which a vehicle drives currently, and recognizing, according to the image of the road surface, the type of the road surface on which the vehicle drives currently; starting a corresponding terrain mode in an all-terrain adaptive mode according to the current type of the road surface; determining a power distribution strategy corresponding to the current terrain mode according to a correspondence between terrain modes and preset power distribution strategies; and switching a center differential of the vehicle to a corresponding locking mode according to the current power distribution strategy, and distributing, in the locking mode, torques to front and rear axles of the vehicle according to a torque distribution curve corresponding to the current power distribution strategy. The front and rear axles of a four-wheel drive vehicle can be conveniently provided with adequate torques on different road surfaces.