Vehicle Roof Parallel Operation Timing Control
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Solution Overview
Problem
The existing electric retractable roofs of vehicles take longer to open and close due to the differing speeds of the roof and storage compartment cover operations, requiring them to operate in non-interfering regions, which increases the overall time for series of operations.
Innovation Solution
Operating the openable/closable roof and storage compartment cover in parallel, allowing them to be closer without interfering, by starting certain steps before others finish, and adjusting their speeds to minimize distance and prevent interference, thus reducing the time taken for opening and closing operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the roof and storage compartment cover operate sequentially in non-interfering regions, then interference between components is avoided, but the total operation time increases
Solution Approach 1:
The storage compartment cover operation is started in advance before the roof operation begins. The cover moves to a predetermined position and waits, creating a time buffer that allows the roof to complete its movement without causing interference, while still enabling parallel execution of both operations
Solution Approach 2:
The control system dynamically adjusts the timing and speed of the cover and roof operations based on real-time position feedback. The cover can operate at full speed initially, then slow down or pause at predetermined positions to yield to the roof, optimizing the balance between parallel operation and interference prevention
2Speed
If the roof and storage compartment cover operate at different speeds, then each component can move efficiently, but they must operate in separate time regions increasing overall time
Solution Approach 1:
Both the roof and storage compartment cover operate simultaneously rather than sequentially. The cover starts moving first and continues its motion while the roof operates, maintaining continuous useful action from both components and eliminating idle waiting time
Solution Approach 2:
The storage compartment cover is positioned in advance to a predetermined position before the roof operation completes. This preliminary positioning allows the cover to be ready for its next movement phase without waiting for the roof to finish, enabling continuous parallel operation
Data Source
AI summary
A second step of opening a closed openable/closable roof starts before a first step of opening a closed storage compartment cover finishes, so that a distance between portions of the storage compartment cover and the openable/closable roof facing each other is shorter at a point in time when the storage compartment cover is fully opened in the first step than at any other point in time. A fifth step of closing the open openable/closable roof starts before a fourth step of opening the closed storage compartment cover finishes, so that a distance between portions of the storage compartment cover and the openable/closable roof facing each other is shorter at a point in time when the storage compartment cover is fully opened in the fourth step than at any other point in time.