Vehicle Drive Force Control Device for Stability

The patent segments the drive force control into two independent parts: main drive wheels and auxiliary drive wheels. By independently controlling the drive force of each segment, the system can reduce auxiliary drive force to suppress instability while maintaining or increasing main drive force to preserve overall propulsion capability. This segmentation allows differential control strategies for different wheel groups based on vehicle stability requirements.

The patent applies local quality by implementing asymmetric drive force distribution between main and auxiliary drive wheels. Instead of uniformly reducing all wheel drive forces, the system specifically reduces drive force only at auxiliary wheels where it contributes to instability, while maintaining or increasing drive force at main wheels. This localized control approach preserves overall drive capability while addressing the specific stability issue.

The patent extracts the stability control function from a comprehensive vehicle dynamics control system and implements it as a dedicated drive force distribution mechanism. By separating this specific function, the system achieves effective stability control through a focused control strategy that manages front-rear drive force distribution independently, rather than requiring complex integration with other vehicle control systems.

The patent implements dynamic drive force distribution that automatically adjusts the proportion of drive force to main and auxiliary wheels based on real-time vehicle stability conditions. The control system continuously monitors vehicle state and dynamically modifies drive force allocation, enabling adaptive stability control that responds to changing driving conditions without requiring overly complex predetermined control logic.