Chassis Floor Tank Relocation for Depollution Agent Storage
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Solution Overview
Problem
Existing motor vehicle chassis assemblies face challenges in accommodating variable wheelbase lengths and insufficient depollution agent storage volume, particularly when using modular platforms and integrating SCR systems, which complicates assembly and reduces operational autonomy.
Innovation Solution
The assembly relocates the depollution agent tank to the front zone of the chassis floor, partially positioning it in a deformable lateral zone for impact absorption, allowing for a constant pipe length and increased storage volume, while integrating a single-piece tank with a fuel compartment and sealed junction zone, along with gauge-pump modules and fixing lugs for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If the depollution agent tank is located under the rear load floor, then the storage volume is sufficient, but the pipe length varies with wheelbase which complicates assembly
Solution Approach 1:
The patent relocates the depollution agent tank from the rear load floor to the front zone under the passenger seats, utilizing the lateral deformable zone. This spatial repositioning in a different dimension (from rear to front lateral zone) resolves the contradiction by providing both sufficient storage volume and constant pipe length connectivity to the SCR catalyst, eliminating assembly complexity across different wheelbase configurations.
2Strength
If another element such as an exhaust silencer is installed under the load floor, then the structural integrity is maintained, but the tank volume becomes insufficient for target performance
Solution Approach 1:
The patent extracts the depollution agent tank from the rear load floor zone where it conflicts with exhaust silencer installation, and relocates it to the front lateral deformable zone. This extraction resolves the spatial conflict, allowing both the exhaust silencer to be installed under the load floor and the tank to achieve sufficient volume in the front zone without compromising structural integrity.
3Volume of stationary object
If the tank is positioned in the deformable lateral zone, then the storage volume increases, but the safety during impact may be compromised
Solution Approach 1:
The patent utilizes the deformable lateral zone's impact absorption characteristics to protect the depollution agent tank. The deformable zone acts as a cushion during side impacts, converting the harmful impact energy into beneficial deformation that protects the tank. This resolves the contradiction by transforming the potential vulnerability of the deformable zone into a protective feature that safeguards the tank while maintaining adequate storage volume.
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 simplifies assembly by eliminating pipe length variability and enhances depollution agent storage capacity, achieving extended operational autonomy of up to 20,000 km before refilling, while ensuring safety and compatibility with modular platforms.
Implementation Method 1
a pipe associated with an electric cable acting as an electrical resistance capable of heating the depollution agent which is sensitive at low temperatures
Data Source
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Figure 2a~2c
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AI summary
The invention relates mainly to an assembly for a motor vehicle chassis comprising a floor (1) having a front area (2) formed by a first portion (21) located under a seat of a driver and under a seat of a front passenger of the vehicle, and a second portion (22) located under the back passenger seats of the vehicle, as well as a tank (8) comprising a first compartment (10) defining a hollow volume for storing a pollutant removal agent. According to the invention, the first compartment (10) of the tank (8) is arranged in the front area (2) of the floor at least partially in a side area (19) that is deformable in the event of an impact of the vehicle. The invention also relates to the corresponding motor vehicle provided with such an assembly for a chassis.