Vehicle Hood Pop-Up Mechanism with Movable Hinge
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Solution Overview
Problem
Existing hood pop-up structures in vehicles do not adequately protect pedestrians and limit the design flexibility at the front portion of the vehicle body, as they expose critical components like windshields and wipers during hood operation, and require dedicated space for hinge operations.
Innovation Solution
A hood pop-up structure that uses a movable-side hinge and a rotation link mechanism, allowing the hood to move upward and obliquely backward, eliminating the need for hinge operation space and enhancing protection range by integrating a securing member with brittle portions to manage actuator forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional hinge structure is used for the pop-up mechanism, then the hinge can support hood opening and closing, but dedicated space for hinge operation is required limiting component layout freedom
Solution Approach 1:
The pop-up mechanism merges the functions of the conventional hinge with additional pop-up capability. The movable-side hinge integrates the opening/closing support function with the pop-up lifting function, eliminating the need for separate hinge operation space. The rotation link and actuator work together with the movable-side hinge to achieve both hood opening and emergency pop-up operations within the same structural envelope.
Solution Approach 2:
The movable-side hinge and rotation link mechanism serves multiple functions: it supports normal hood opening and closing operations, enables emergency pop-up lifting, and does so within a compact space that does not constrain other component layouts. This multi-functionality replaces the need for dedicated hinge operation space while maintaining all required operations.
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 solution increases pedestrian protection and enhances design freedom at the front vehicle body by allowing the hood to move upward and obliquely backward, reducing exposure to critical components and eliminating the need for dedicated hinge space, resulting in a more compact and versatile component layout.
Implementation Method 1
a movable-side hinge that extends forward from a rotation shaft supported on the side of the vehicle body and is able to rotate about the rotation shaft
Implementation Method 2
a rotation link extending forward from a coupling shaft provided at the movable-side hinge is rotatably coupled to the coupling shaft
Data Source
AI summary
A hood back portion moving mechanism is supported with a hinge on a side of a vehicle body such that a back end portion of a hood provided at a front portion of a vehicle body is able to be opened and closed, and the hood is lifted up by an actuator. A back end portion of a pop-up link is rotatably coupled to an upper hinge included in the hinge, the hood is rotatably coupled to a front end portion of the pop-up link, and the actuator is bridged over the upper hinge and the hood.