Vehicle Hood Hinge Lifting Mechanism Actuator Alignment
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Solution Overview
Problem
Existing hinge devices for motor vehicle front hoods in pedestrian impact protection systems risk skewing or twisting of actuators due to large actuator sizes, leading to inadequate positioning and increased risk of injury.
Innovation Solution
A hinge device design with a lifting mechanism where the actuator contact surface and front hood contact surface are positioned to allow a shorter actuator, minimizing the risk of skewing and twisting, and incorporating a securing pawl to prevent unintended hood raising, while enabling efficient kinematics and reduced installation space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large actuator is used in the hinge device, then the actuator surface can fully contact the front hood hinged lever contact surface, but this increases the risk of skewing or twisting and leads to inadequate raising movement
Solution Approach 1:
A lifting device with actuator contact surface and front hood contact surface is introduced as an intermediary between the actuator and the front hood hinged lever. This mediator transfers the actuating force while maintaining proper alignment, allowing a shorter actuator to effectively raise the front hood without skewing or twisting.
2Ease of operation
If a shorter actuator is used in the hinge device, then the risk of skewing and twisting is reduced, but the actuator surface cannot fully contact the front hood hinged lever contact surface
Solution Approach 1:
The lifting device serves as a mediator that extends the effective reach of the shorter actuator. The actuator contact surface on the lifting device receives force from the actuator, and the front hood contact surface transfers this force to raise the front hood, ensuring full contact reliability despite the shorter actuator length.
3Ease of operation
If a lifting device with extended actuator contact surface is introduced, then shorter actuators can be used with improved kinematics, but the device complexity increases
Solution Approach 1:
The lifting device combines multiple functions into a single component: it provides the actuator contact surface for force application, the front hood contact surface for load transfer, and the structural linkage for motion transformation. This merging reduces the need for separate components and simplifies the overall device structure.
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 design ensures reliable and efficient raising of the front hood with reduced risk of actuator skewing, improved kinematics, and compact installation, effectively enhancing pedestrian impact protection.
Implementation Method 1
a lifting device with an actuator contact surface and a front hood contact surface is provided on the front hood fastening part, wherein the actuator surface can be brought to bear against the actuator contact surface
Data Source
AI summary
A hinge device of a front hood of a motor vehicle is adjustable from a normal position into a protective position in the event of a collision. A front-hood surface and a lifting device with an actuator contact surface and a front-hood contact surface are provided on a front-hood-fastening part. An actuator surface can be brought to bear against the actuator contact surface and the front-hood contact surface can be brought to bear against the front-hood surface during an adjustment from the normal position into the protective position. The distance, which is provided substantially in the actuating direction of the actuator on the lifting device, between the front-hood contact surface and the actuator contact surface is greater than the distance between the actuator surface and the front-hood hinge-lever contact surface. Furthermore, a correspondingly equipped motor vehicle and a method for opening out the hinge device are provided.