Fluid-Chamber Vehicle Seat Cushion for Driver Micro-Movements
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Long driving times in commercial vehicles lead to physical discomfort, muscle fatigue, and reduced attention and reaction times due to monotonous and one-sided sitting postures, increasing the risk of accidents.
Innovation Solution
A vehicle seat with a fluid chamber unit comprising at least two fluid chambers between the seat plate and cushion parts, controlled by a unit that introduces and removes fluid to create micro-movements, promoting intervertebral disc elasticity and reducing muscle tension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a driver maintains a fixed sitting position during long journeys, then ergonomic adjustment and driving experience are optimized, but physical discomfort, muscle fatigue, and reduced attention occur due to monotony and one-sided posture
Solution Approach 1:
The seat cushion part is designed to be dynamically deformable through fluid chamber expansion and contraction, allowing the seat to adapt its shape during operation. This dynamic deformation creates micro-movements that prevent static discomfort while maintaining ergonomic support, resolving the contradiction between fixed ergonomic positioning and driver alertness during long journeys
Solution Approach 2:
The control unit operates the fluid chambers in periodic cycles, alternating between expansion and contraction phases. This periodic action generates rhythmic micro-movements in the seat cushion that stimulate blood circulation and prevent muscle fatigue, thereby maintaining driver attention and reaction time without compromising ergonomic adjustment
2Ease of manufacture
If the seat cushion part is made rigid for structural stability, then manufacturing and assembly are simplified, but it cannot generate micro-movements to reduce static discomfort and muscle fatigue
Solution Approach 1:
The seat cushion part is constructed as a flexible shell structure that can deform in response to fluid chamber expansion. This flexible design allows the cushion to generate micro-movements and adapt to driver movements, eliminating static discomfort while remaining manufacturable through standard molding techniques for the shell structure
Solution Approach 2:
Fluid chambers are integrated within the seat cushion structure to provide controlled expansion and contraction. This pneumatic/hydraulic system enables the rigid-looking cushion to generate subtle micro-movements that reduce static discomfort, while the overall structure remains manufacturable using composite materials and standardized fluid chamber components
3Object-affected harmful factors
If fluid chambers are added to the seat structure to generate micro-movements, then static discomfort and muscle fatigue are reduced, but device complexity increases
Solution Approach 1:
The fluid chambers are merged with the existing seat cushion structure, integrating the comfort-enhancing mechanism into the already-present components. The control unit leverages the existing power steering pump to drive the fluid chambers, combining multiple functions into existing systems and minimizing additional complexity while effectively reducing static discomfort
4Reliability
If multiple fluid chambers are used to create varied micro-movements, then driver comfort and attention are improved, but manufacturing precision and assembly difficulty increase
Solution Approach 1:
The seat cushion is divided into multiple segmented fluid chambers that can be independently controlled. This segmentation allows varied micro-movements across different zones of the seat, enhancing driver comfort and attention. The modular chamber design simplifies assembly by allowing pre-fabricated units to be installed in standardized positions, offsetting the complexity of precise positioning
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 effectively reduces static discomfort, muscle fatigue, and improves attention and reaction times by generating micro-movements that deform the seat cushion, enhancing driver comfort and safety during long journeys.
Implementation Method 1
designed to introduce and to remove a fluid into/from the at least two fluid chambers so that an expansion in the height axis of the at least two fluid chambers can be controlled
Implementation Method 2
The seat cushion part is preferably made of a flexible, reversibly deformable material, preferably a rigid foam
Data Source
AI summary
The invention relates to a vehicle seat having an upper seat part for receiving a person, which upper seat part comprises a seat plate part and a seat cushion part, the seat cushion part being arranged above the seat plate part in relation to a height axis of the vehicle seat and the seat plate part and the seat cushion part being arranged so as to at least partially overlap in relation to the height axis, forming an intermediate first overlap region, a fluid chamber unit having at least two fluid chambers being arranged at least partially within the first overlap region between the seat plate part and the seat cushion part, a control unit being provided, designed to introduce and to remove a fluid into/from the at least two fluid chambers so that an expansion in the height axis of the at least two fluid chambers can be controlled.