Adaptive Vehicle Braking Control for Load-Induced Deflection
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Solution Overview
Problem
Existing vehicle control systems are inadequate in reducing collision damage, particularly when the vehicle's center of gravity is high or the weight distribution is uneven, leading to insufficient deceleration and potential lane deviation during braking, which can result in increased collision risk.
Innovation Solution
A vehicle control device that includes a travelability determination unit, a deflection estimation unit, and a braking control unit to calculate and adjust deceleration and deceleration timing based on the distance to an obstacle, relative speed, and the vehicle's load state, ensuring effective deceleration and maintaining vehicle posture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If braking is made weak to maintain vehicle posture when center of gravity is high or weight distribution is uneven, then vehicle stability is improved, but collision damage reduction becomes insufficient
Solution Approach 1:
The brake control unit dynamically adjusts braking force distribution based on real-time detection of vehicle loading states. When offset loading is detected, the system applies different braking forces to left and right wheels to counteract deflection while maintaining sufficient deceleration for collision avoidance. This dynamic adaptation resolves the contradiction by allowing strong braking when safe and posture maintenance when needed.
Solution Approach 2:
The system changes the braking control parameters (brake force magnitude and distribution) based on the detected loading state. By adjusting these parameters according to whether the vehicle is lightly or heavily loaded and how the load is distributed, the system achieves both sufficient deceleration for collision prevention and adequate posture stability, resolving the contradiction between the two opposing requirements.
2Ease of operation
If equal brake pressure is applied to left and right wheels, then braking simplicity is maintained, but vehicle deflection occurs when center of gravity is offset
Solution Approach 1:
The brake control unit automatically detects the vehicle's loading state and self-adjusts the braking force distribution without driver intervention. The system monitors wheel speeds and vehicle behavior to detect offset loading conditions, then automatically applies differential braking to correct deflection. This self-service approach maintains ease of operation while ensuring directional stability, resolving the contradiction between simplicity and stability.
Data Source
AI summary
The present invention provides a vehicle control device capable of enhancing the ability of reducing or avoiding collision damage in a vehicle where a behavior of the vehicle when a braking operation is performed is largely influenced corresponding to a state of load (a loaded state), for example.The vehicle control device includes: a travelability determination unit 300 configured to determine whether or not a vehicle 1 is travelable in an area disposed ahead of the vehicle on left and right sides of the vehicle; a deflection estimation unit 200 configured to estimate deflection of the vehicle 1 due to generation of a brake force applied to the vehicle 1; and a braking control unit 800 configured to calculate deceleration and deceleration start timing based on a distance between the vehicle 1 and an obstacle ahead of the vehicle 1 and a relative speed of the vehicle 1 to the obstacle, and configured to change at least one of the deceleration and the deceleration start timing based on a travelability determination result acquired from the travelability determination unit 300 and a deflection estimation result acquired from the deflection estimation unit 200.