Split Aerodynamic Bottom for Lower Rear Engine Packaging
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Solution Overview
Problem
The existing design of cars with a driving engine mounted at a distance from the lower floor results in a high center of gravity, compromising aerodynamics.
Innovation Solution
The car features an aerodynamic bottom configuration with a fixed and movable portion of the rear bottom, connected via an elastic shock absorber, allowing the driving engine and center of gravity to be lowered, enhancing aerodynamics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the driving engine is fixed at a distance from the lower floor to allow movement via shock absorber, then the engine can move relative to the lower floor during normal operation, but the center of gravity becomes relatively high, jeopardizing aerodynamics
Solution Approach 1:
The aerodynamic bottom is divided into a fixed front bottom and a movable rear bottom that can assume different positions (first and second positions). This segmentation allows the rear bottom to move with the engine while maintaining aerodynamic continuity, resolving the contradiction between engine movement capability and aerodynamic performance.
Solution Approach 2:
The rear bottom is designed as a dynamic element that can change position between first and second positions according to the engine's movement. This dynamic configuration maintains the aerodynamic profile while accommodating the engine's relative movement, eliminating the need for a fixed high-position mounting.
2Reliability
If the driving engine is mounted centrally in the rear area fixed to the support frame, then the engine is securely mounted, but the center of gravity is elevated, compromising aerodynamic performance
Solution Approach 1:
The aerodynamic bottom is segmented into fixed and movable portions, allowing the movable rear bottom to follow the engine's position changes while maintaining aerodynamic continuity. This resolves the contradiction by enabling secure engine mounting without elevating the center of gravity relative to the aerodynamic profile.
Solution Approach 2:
The movable rear bottom acts as an intermediary element between the engine and the fixed aerodynamic profile. It transfers the engine's movement while maintaining the continuous aerodynamic surface, allowing secure engine mounting without compromising aerodynamics.
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
This configuration effectively reduces the center of gravity and improves aerodynamics by allowing air to flow smoothly along the floor, enhancing the car's overall performance.
Implementation Method 1
The driving engine 12 is connected to the frame 2 through the interposition of an elastic shock absorber device, which allows the driving engine 12 to move relative to the frame 2 during the normal operation of the car 1
Data Source
AI summary
A car is provided with a support frame defining part of a lower floor of the car, with a passenger compartment projecting upwards from the lower floor, with a driving engine to move the car, and with an aerodynamic bottom, which is at least partly fixed to the support frame, defines part of the lower floor and has a fixed portion locked on the support frame and a movable portion locked on the driving engine and movable relative to the fixed portion.