Rear Collision Preparation System with Movable Bumper
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Solution Overview
Problem
Existing automotive collision warning systems are inadequate in addressing rear-end collisions, as they primarily focus on forward collisions and lack effective measures to prevent or mitigate rear collisions, which can result in significant damage and risk to vehicle occupants.
Innovation Solution
The implementation of a Rear End Advanced Collision Technology (REACT) system that utilizes a combination of sensors and an electronic control unit to monitor vehicle information, detect potential rear collisions, and send signals to vehicle systems to prepare for and prevent or mitigate rear-end collisions through warnings, pre-charging brakes, deploying a movable energy-absorbing bumper, and adjusting vehicle height, while also potentially alerting other vehicles involved.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If collision warning systems focus only on forward collisions, then the system complexity is reduced, but rear-end collision protection is insufficient
Solution Approach 1:
The existing forward collision warning system is enhanced to perform multiple functions: it continues to detect forward obstacles while simultaneously monitoring for rear-end collisions using additional sensors. This allows one system to serve multiple safety purposes without requiring completely separate detection systems
2Strength
If no preparatory actions are taken before rear collision, then energy absorption is minimized, but damage to vehicle and occupants increases
Solution Approach 1:
When a rear-end collision is detected as imminent, the system activates preparatory measures including pre-charging the brake system, deploying the movable bumper to an energy-absorbing position, and adjusting vehicle height before impact occurs. These actions take place in the brief time window between detection and actual collision
Solution Approach 2:
The movable bumper is positioned in advance to create an energy-absorbing barrier between the impacting vehicle and the main vehicle structure. This pre-positioned cushioning element is designed to deform and absorb collision energy, protecting critical components and occupants from direct impact forces
3Strength
If movable energy-absorbing bumper is deployed, then collision damage is reduced, but device complexity increases
Solution Approach 1:
The bumper system transitions from a static structure to a dynamic, movable component that can change its position and configuration in response to detected collision threats. The bumper moves between a retracted normal position and an extended energy-absorbing position, allowing it to adapt its function based on operational conditions
Data Source
AI summary
A method of controlling stability of a vehicle comprises monitoring vehicle information with an electronic control unit. The electronic control unit determines if a rear collision from a second vehicle approaching from a rear direction is likely. A first response signal is sent to at least one vehicle system from the electronic control unit prior to the rear collision. The at least one vehicle system changes state based upon the first response signal to prepare the vehicle for the rear collision.