Dual-Latch Front Hood Release System for Accidental Opening Prevention
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Solution Overview
Problem
Vehicles with alternate propulsion systems require a secure front storage compartment that cannot open accidentally while in motion, and a means to release the latch from within the compartment for safety.
Innovation Solution
A dual-latch system with a primary latch actuable from within the vehicle cabin and a secondary latch accessible from outside, linked through a Bowden cable and powered actuator, ensuring the front hood can only be fully opened by releasing both latches, preventing accidental opening during travel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single latch system is used for the front hood, then the structure is simple and easy to operate, but the security against accidental opening during vehicle motion is insufficient
Solution Approach 1:
The latch system is divided into two independent latches: a primary latch that can be actuated from inside the vehicle and a secondary latch that can only be actuated from outside the vehicle. Both latches must be released simultaneously to open the hood, preventing accidental opening during motion while maintaining structural simplicity through modular design.
2Ease of operation
If the front hood is secured with a latch accessible only from inside the vehicle, then safety is improved, but accessibility from outside for emergency situations is limited
Solution Approach 1:
The release mechanism is segmented into two locations: the primary release handle inside the vehicle for normal operation and safety, and the secondary release handle outside the vehicle for emergency access. The dual-latch system ensures that neither handle alone can open the hood, balancing accessibility with security.
3Reliability
If a dual-latch system is implemented with both latches requiring release, then security against accidental opening is improved, but the device complexity increases
Solution Approach 1:
The system uses two simple latch mechanisms rather than one complex latch with multiple locking points. Each latch is independently actuated by its own handle through cable links, maintaining mechanical simplicity while achieving enhanced security through the segmented approach.
4Ease of operation
If the primary latch is actuated from within the vehicle cabin, then ease of operation is improved, but the ability to open from outside for safety emergencies is reduced
Solution Approach 1:
The dual-latch system provides multi-functionality: the primary latch handles normal opening operations from inside the vehicle, while the secondary latch enables emergency opening from outside. Together, they create a versatile system that adapts to different operational scenarios and safety requirements.
Data Source
AI summary
A front hood latch release system includes a primary latch and a secondary latch securing the front hood. A first handle is disposed within a vehicle cabin and linked to actuate the primary latch. An emergency handle is disposed within a compartment covered by the front hood and linked to actuate the primary latch. A secondary handle is accessible from outside the vehicle cabin and linked to actuate the secondary latch.