ADAS-Linked Active Hood Spindle Mechanism for Dynamic Pop-Up Height
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Solution Overview
Problem
Existing active hood devices for vehicles are not capable of always-on operation and do not effectively adjust the pop-up height of the hood based on the probability of a collision during autonomous driving, which can lead to inadequate pedestrian protection in unexpected collision scenarios.
Innovation Solution
An ADAS-linked active hood apparatus that includes a controller receiving driving information from advanced driving assistance systems to adjust the pop-up height of the hood via a motor-operated spindle, considering factors like collision probability, time-to-collision, and collision object characteristics, allowing for staged adjustments in pop-up height to enhance safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a disposable active hinge is used for pop-up operation during collision, then pedestrian safety is improved, but the system cannot provide always-on operation or adaptive adjustment based on collision probability
Solution Approach 1:
The patent replaces the disposable active hinge with a motor-driven spindle that can dynamically adjust the hood's pop-up height based on real-time driving conditions and collision probability detected by the ADAS system. This enables the system to transition from a static, single-use mechanism to a dynamic, adaptive system that operates continuously and adjusts to varying safety requirements.
Solution Approach 2:
The system incorporates ADAS (advanced driving assistance systems) that continuously monitor the driving environment and provide feedback to the control unit. Based on this feedback regarding collision probability and driving conditions, the control unit adjusts the spindle's pop-up height in real-time, enabling always-on adaptive operation rather than relying on a pre-set disposable mechanism.
2Device complexity
If a fixed pop-up height is used in traditional active hood devices, then the structure is simple, but the system cannot adapt to different collision scenarios or provide optimized protection
Solution Approach 1:
The patent implements a motor-driven spindle that can dynamically adjust the hood's pop-up height to different positions based on detected collision scenarios. This replaces the fixed-height mechanical linkage with a controllable actuator that provides variable adjustment while maintaining reasonable structural complexity through integrated control systems.
Solution Approach 2:
The system changes the pop-up height parameter in real-time based on ADAS detection results. The control unit receives information about collision probability and driving conditions, then adjusts the spindle's vertical position accordingly, enabling the same physical structure to provide optimized protection for different collision scenarios by varying the hood elevation parameter.
3Reliability
If an always-on active hood system with adaptive pop-up height is implemented, then pedestrian protection is enhanced, but the device complexity and control system requirements increase
Solution Approach 1:
The patent leverages the ADAS system, which is already present in modern vehicles for autonomous driving assistance, to provide collision probability detection and control signals for the active hood. By reusing this existing multi-functional system for both driving assistance and hood control, the patent enhances pedestrian protection without proportionally increasing overall device complexity.
Solution Approach 2:
The control unit serves as an intermediary that receives complex ADAS data regarding collision probability and driving conditions, processes this information, and translates it into appropriate control signals for the motor-driven spindle. This intermediary layer simplifies the interface between the sophisticated sensing system and the actuation mechanism, managing complexity through structured control architecture.
Data Source
AI summary
An ADAS-linked active hood apparatus for always-on operation is provided. The apparatus includes a hinge arm that is connected to a hood of a vehicle, a stationary bracket that is fixed to a vehicle body, and a rotary bracket that rotates about a pivot pin of the stationary bracket. A first link interconnects the rotary bracket and the hinge arm and a spindle is integrally connected to the rotary bracket. A controller receives driving information of the vehicle via an ADAS and adjusts a pop-up height of the hood when a collision is expected based on the received driving information.