Vehicle Drag Reducing Apparatus Rotary Support
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Solution Overview
Problem
Existing airflow deflectors installed on vehicles to reduce drag interfere with the opening of rear doors when stopped, as they need to be dismantled, causing inconvenience.
Innovation Solution
A rotationally supporting structure with a diversion body and rotary piece that can be rotated 180 degrees away from the tail end of the vehicle, allowing the deflector to be moved out of the way when opening the rear door while maintaining airflow guidance to reduce drag during movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a deflector is vertically arranged at the tail end of the lateral surface of the vehicle body to guide airflow and reduce drag, then the drag is reduced, but the deflector becomes a hindrance for opening the rear door when the vehicle is stopped
Solution Approach 1:
The deflector is designed to be movable rather than fixed. A rotary piece enables the deflector to rotate between a vertical position (when the vehicle is moving) and a horizontal position (when the vehicle is stopped). This dynamic adjustment allows the deflector to adapt its position based on the vehicle's operational state, eliminating the obstruction to rear door opening while maintaining drag reduction capability during motion.
Solution Approach 2:
The deflector system is divided into separable components: the deflector body and the rotary piece. This segmentation allows the deflector to be independently rotated and positioned. The rotary piece acts as a separate mechanical element that controls the deflector's orientation, enabling it to be moved out of the way when needed without affecting the overall structure of the drag-reducing apparatus.
2Loss of energy
If a long deflector is installed at the tail end of the lateral surface to guide lateral airflow to the back of the vehicle, then the drag formation is reduced, but the deflector must be dismantled before opening the rear door, causing inconvenience
Solution Approach 1:
Instead of requiring manual dismantling, the deflector is equipped with a rotary mechanism that enables automatic repositioning. When the rear door needs to be opened, the rotary piece can be rotated to move the deflector horizontally, clearing the path for door opening. This eliminates the time-consuming manual dismantling process while maintaining the drag-reducing function during vehicle operation.
Solution Approach 2:
The rotary mechanism enables the deflector to reposition itself without requiring manual intervention. The rotary piece can be manually rotated to the appropriate position, allowing the system to serve itself by automatically clearing the path for door opening. This self-service capability eliminates the need for separate dismantling operations and reduces the time loss associated with manual removal and reinstallation.
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
Enhances the practicality and convenience of drag reduction by allowing the rear door to open without obstruction while effectively guiding airflow to minimize drag when the vehicle is in motion.
Implementation Method 1
One end of the rotary piece is pivoted to the vehicle body, while another end is fixed to the diversion body. Rotating the rotary piece will bring along the diversion body to be abutted against the tail end of the vehicle body or to be moved to a side far away from the tail end of the vehicle body.
Implementation Method 2
The airflow flowing across the lateral surface of the vehicle body is guided to the tail end of the vehicle by the diversion body.
Implementation Method 3
By vertically arranging the deflector at the tail end of the lateral surface of the vehicle body, the direction of the airflow passing through the deflector can be changed. When the lateral airflow is guided to the back of the vehicle, the formation of the drag can be thereby reduced.
Data Source
AI summary
A vehicle's drag-reducing apparatus, adapted to be arranged at the tail end of a vehicle, includes a diversion body positioned at the lateral surface of the vehicle and a rotary piece. The airflow flowing across the lateral surface of the vehicle body is guided to the tail end of the vehicle by the diversion body. One end of the rotary piece is pivoted to the vehicle body, while another end is fixed to the diversion body. Rotating the rotary piece will bring along the diversion body to be abutted against the tail end of the vehicle body or to be moved to the position far away from the tail end of the vehicle body. Thereby, the opening of the rear door at the tail end of the vehicle won't be hindered, even where there is an arrangement of the diversion body.