Vehicle Lid Half-Lock Sequencing for Fast, Quiet Release
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Solution Overview
Problem
Existing lid opening and closing systems for vehicle lids, such as trunks, experience prolonged lock release times and generate abnormal noises like collision noises due to the sequence of lock release and lid movement, especially when the lid is moved to the closing side before the lock is released.
Innovation Solution
A lid opening and closing system with a lock device that transitions the lid through a half-locked state before full lock release, using a control device to manage the lock and drive mechanisms to synchronize lid movement with lock release, reducing abnormal noise and accelerating the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the lid is moved to the closing side before the lock is released, then the reaction force from the seal member is reduced and collision noise is prevented, but the time from opening command to lock release is prolonged
Solution Approach 1:
The lock release process is segmented into two distinct stages: first transitioning from locked to half-locked state, then from half-locked to lock-released state. This segmentation allows the system to perform lid pull-in during the first stage (reducing noise) while maintaining a responsive overall process
Solution Approach 2:
The lid pull-in action is performed preliminarily during the transition from locked to half-locked state, before the lock is fully released. This preliminary action reduces the reaction force on the seal member and prevents collision noise during the subsequent lock release
2Loss of time
If the lock is released before the lid is moved to the closing side, then the response time is improved, but abnormal collision noise is generated between members
Solution Approach 1:
The system performs preliminary lid pull-in action during the transition to half-locked state, ensuring the lid is properly positioned before full lock release, thereby preventing collision noise while maintaining fast response
Solution Approach 2:
The system dynamically adjusts the lock state through an intermediate half-locked state, allowing flexible control of the timing between lid movement and lock release to optimize both response time and noise prevention
3Device complexity
If a direct lock release mechanism is used, then the device complexity is reduced, but the ability to control lid movement and lock release synchronization is insufficient
Solution Approach 1:
The lock mechanism is segmented into multiple controllable states (locked, half-locked, lock-released) with distinct engagement configurations, enabling precise control of lid movement synchronization while maintaining reasonable mechanical complexity
Data Source
AI summary
A lid opening and closing system opens, closes and locks a lid supported by a vehicle body of a vehicle. The lid opening and closing system includes: a lock device configured to bring the lid into any one of a locked state, a half-locked state, and a lock-released state; an opening and closing drive device configured to open and close the lid; and a control device configured to control the lock device to transition the lid from the locked state to the lock-released state via the half-locked state in response to an opening command of the lid, and configured to control the opening and closing drive device to pull-in the lid toward a closing side while the lock device operates to transition the lid from the locked state to the half-locked state.