Rear Bumper Diffuser Mechanism for Adaptive Airflow Control
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Solution Overview
Problem
Existing air spoilers and diffusers on vehicles limit design freedom and provide limited aerodynamic performance improvements, compromising the aesthetic appeal of high-end vehicles and restricting further enhancements in driving stability and fuel efficiency.
Innovation Solution
A diffuser apparatus with retractable and deployable diffusers in the rear bumper, utilizing a tilting and sliding mechanism controlled by a single driver, allowing optimized airflow control based on driving conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional air spoiler is mounted on the rear of the vehicle, then aerodynamic performance is improved, but design freedom is limited and the aesthetic appeal of high-end vehicles is compromised
Solution Approach 1:
The diffuser is designed to be movable rather than fixed, allowing it to change position between retracted and deployed states. This dynamic configuration enables the system to adapt between different aerodynamic requirements and design aesthetics, resolving the contradiction between fixed aerodynamic performance and design flexibility.
Solution Approach 2:
The diffuser is divided into multiple segments (first diffuser and second diffuser) that can move independently. This segmentation allows for more nuanced control over airflow and provides greater design flexibility compared to a single fixed air spoiler structure.
2Reliability
If a diffuser is added to the lower part of the rear bumper, then aerodynamic performance is improved, but the diffuser structure is complex and requires multiple components
Solution Approach 1:
Multiple diffuser components (first diffuser and second diffuser) are combined into a single integrated assembly that operates together. This merging reduces the overall complexity compared to having separate, independently controlled diffusers, while still providing enhanced aerodynamic performance.
Solution Approach 2:
The gear unit serves multiple functions: it controls both the first diffuser's tilting motion and the second diffuser's sliding motion. This multi-functionality reduces the need for separate control mechanisms, thereby simplifying the overall system structure despite the multiple moving parts.
3Device complexity
If the diffuser simply tilts down at the rear bumper, then the structure is simple, but aerodynamic performance improvements are limited
Solution Approach 1:
The diffuser system incorporates motion in multiple dimensions: the first diffuser tilts in a rotational dimension while the second diffuser slides in a linear dimension. This multi-dimensional motion capability significantly enhances aerodynamic performance compared to simple single-axis tilting, while the mechanisms remain relatively straightforward.
Solution Approach 2:
The diffuser system transitions from static to dynamic configuration with two degrees of freedom. The first diffuser provides rotational movement for basic airflow redirection, while the second diffuser adds linear sliding capability for enhanced control, creating a dynamically adaptable aerodynamic surface.
4Reliability
If multiple diffusers are deployed with independent control, then airflow control is optimized, but the operation becomes complex and requires multiple drivers
Solution Approach 1:
A single driver and gear unit are designed to control both the first diffuser and second diffuser through different mechanical linkages. The gear unit can selectively engage with either the first connector (for first diffuser control) or the second connector (for second diffuser control), providing optimized airflow management without requiring separate control systems.
Data Source
AI summary
In a diffuser apparatus, a plurality of diffusers are retracted in a lower part of a rear bumper and is deployed, and the operation of each of the diffusers is divided into a tilting operation and a sliding operation, so that airflow control is optimized for various situations such as driving conditions and driving environment, thereby improving driving stability and aerodynamic performance. In addition, the operation of the plurality of diffusers is controlled by a single driver, thereby simplifying the structure.