Deployable Vehicle Door Handle Assembly for Drag and Noise Reduction
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Solution Overview
Problem
Existing door handles on vehicles protrude from the door, causing noise and reducing fuel efficiency due to air resistance.
Innovation Solution
A deployable door handle assembly for vehicles, featuring a door handle that can be retracted into the vehicle door using a drive lever and actuator, with elastic members for automatic accommodation and deployment, and an optional optical device for emitting light based on vehicle signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the door handle protrudes from the door, then the user can easily access and operate the door handle, but air resistance increases and noise occurs
Solution Approach 1:
The door handle is designed to dynamically change its position between protruding (deployed) and retracted states. The actuator mechanism enables the handle to move between these positions based on operational needs, optimizing both accessibility and aerodynamic performance at different times.
Solution Approach 2:
The door handle is nested within the door body when not in use. The handle can be deployed from its retracted position within the door to an extended operational position, and then returned to its nested state, minimizing its impact on aerodynamics while maintaining functionality.
2Ease of operation
If the door handle protrudes from the door, then the user can easily access and operate the door handle, but noise occurs
Solution Approach 1:
The door handle dynamically adjusts its position, protruding only when needed for operation and retracting when not in use. This reduces the duration and intensity of noise generation from wind interaction while maintaining ease of access during actual door opening operations.
Solution Approach 2:
The handle nests within the door body to minimize exposure to external elements including wind, thereby reducing noise generation. The nested position also protects the handle mechanism from environmental damage.
3Loss of energy
If the door handle is retracted into the door, then air resistance decreases and fuel efficiency improves, but the user cannot access the door handle
Solution Approach 1:
The system dynamically transitions the handle between retracted and deployed states based on detected user intent or operational requirements. Sensors or actuators monitor conditions and automatically deploy the handle when access is needed, then retract it when not in use.
Solution Approach 2:
The door handle is deployed in advance before the user actually needs to open the door. Detection mechanisms anticipate user intent and pre-position the handle in an accessible state, ensuring readiness while minimizing the time the handle remains extended.
4Object-generated harmful factors
If the door handle is retracted into the door, then air resistance decreases and noise is reduced, but the user cannot access the door handle
Solution Approach 1:
The handle system dynamically responds to user presence or intent, transitioning from a low-noise retracted state to an accessible deployed state only when needed. This minimizes the time the handle is extended, reducing overall noise and drag while ensuring accessibility on demand.
Solution Approach 2:
Sensors detect user approach or intent to open the door and provide feedback to the control system. This triggers automatic deployment of the handle, ensuring it is accessible when needed while remaining retracted during normal driving to minimize noise and drag.
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 reduces air resistance by allowing the door handle to be retracted, improves user accessibility by ensuring the handle is fully deployed when needed, and enhances visibility with light emissions indicating vehicle status.
Implementation Method 1
a first elastic member configured to generate an elastic force between the handle housing and the drive lever
Implementation Method 2
a second elastic member configured to generate an elastic force between the drive lever and the door handle
Implementation Method 3
an actuator configured to transmit a driving force to the drive lever to deploy the door handle from the handle housing
Data Source
AI summary
A door handle assembly for a vehicle may include a door handle, a handle housing configured to provide an accommodation space for the door handle, a drive lever rotatably coupled to the handle housing and rotatably coupled to the door handle, and an actuator configured to transmit a driving force to the drive lever to deploy the door handle from the handle housing. In particular, the door handle is deployed from the handle housing as the drive lever is rotated with respect to the handle housing by the driving force of the actuator, and the door handle is rotated with respect to the drive lever.