Adjustable Door Actuation System for Preload Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current door actuation systems for dual door vehicles face challenges in balancing forces between doors, maintaining adequate preloading to prevent shifting and noise, and efficiently adjusting preload forces to prevent door rattle and ensure safety.
Innovation Solution
A door actuation system that includes an actuation device, first and second door leaves, and a first engagement member, which allows for adjustable open and closed preload forces by moving the actuation device relative to the engagement member or adjusting the length of connecting rods, ensuring proper door positioning and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a preset teeter rotation and nominal linkage geometry are used to control door preloading, then the door preloading can be maintained for expected nominal conditions, but the system becomes laborious and difficult to adjust for variations in actual geometry
Solution Approach 1:
The patent makes the previously fixed teeter rotation angle adjustable. The actuator assembly can be repositioned along the door panel to change the teeter rotation angle, allowing the system to adapt to different door geometries and loading conditions. This dynamic adjustment capability resolves the contradiction by enabling both reliable preloading maintenance and easy operational adjustment.
Solution Approach 2:
The patent changes the parameter of teeter rotation angle from a fixed preset value to an adjustable parameter. By allowing the teeter rotation angle to be varied within a range, the system can optimize door preloading for different actual geometries while maintaining reliability. This parameter change enables flexible adjustment without requiring complex recalibration procedures.
2Stability of the object's composition
If the teeter rotation is fixed to maintain door preloading, then the door preloading is stable, but increases to door closed preload decrease the door open preload and vice versa
Solution Approach 1:
The patent introduces dynamic adjustability to the teeter rotation angle, allowing it to be changed based on whether door closed preload or door open preload needs to be increased. This dynamic capability enables the system to adapt between different preload conditions while maintaining stability in the selected configuration, resolving the contradiction between stability and adaptability.
Solution Approach 2:
The actuator assembly is designed to perform multiple functions: it can adjust door closed preload, door open preload, and compensate for geometric variations all through the same mechanism of repositioning along the door panel. This multi-functionality allows a single adjustment mechanism to handle various preload requirements without compromising stability.
3Manufacturing precision
If variable linkages such as connecting rod length are adjusted to account for geometry variations, then the door preloading accuracy improves, but the operation becomes more laborious and error-prone
Solution Approach 1:
Instead of adjusting multiple variable linkages, the patent uses a single dynamic adjustment of the actuator assembly position along the door panel. This single-point adjustment achieves the same geometric compensation effect while being much simpler to operate and less prone to errors, resolving the contradiction between precision and ease of operation.
Solution Approach 2:
The patent extracts the adjustment function from multiple distributed variable linkages and concentrates it in a single actuator assembly position adjustment. By taking out the adjustment capability from the linkage geometry itself and placing it in the actuator positioning system, the design achieves high precision with simplified operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively balances forces between dual doors, maintains proper preloading to prevent shifting and noise, and adjusts preload forces to prevent door rattle, enhancing safety and reducing operational complexity.
Implementation Method 1
The door actuation system may include a spring that may apply a force to move the actuation device
Data Source
AI summary
A door actuation system may include an actuation device to move a first door leaf and a second door leaf between an open and a closed position. The actuation device may provide an open preload force in the open position. The actuation device may provide a closed preload force in the closed position. The system may include one or more of: a first engagement member that may contact the actuation device and may allow movement of the actuation device to adjust the open and closed preload force; or the actuation device may be coupled with the first door leaf by a first rod and the second door leaf by a second rod, at least one of the first or second rod may adjust a length of the first or second rod to maintain the open preload force in the open position and the closed preload force in the closed position.