Work Vehicle Fuel Tank Shielding Liquid Tank Heat
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Solution Overview
Problem
Existing work vehicles with urea water solution tanks for exhaust gas purification are exposed to hot air from engines, leading to expansion issues and inefficient supply structures, with no effective protection from heat and potential mixing of fuels and reductants during supply.
Innovation Solution
A work vehicle design where the fuel tank shields the liquid tank from hot air, using a recessed structure to accommodate the liquid tank and incorporating a heat exchanger for cooling, with separate and angled inlets to prevent mixing and allow for expansion space, ensuring the liquid tank is protected from heat and efficiently supplied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the liquid tank is arranged in the space between the vehicle body and the ground to utilize space, then space utilization is improved, but the tank is exposed to hot air from the engine causing the purification liquid to expand
Solution Approach 1:
The liquid tank is nested within the fuel tank structure, specifically utilizing the fuel tank as a protective outer shell. The fuel tank's robust construction and positioning create a thermal barrier that shields the liquid tank from engine heat while maintaining compact space utilization.
Solution Approach 2:
The fuel tank serves as an intermediary element between the engine (heat source) and the liquid tank. By positioning the liquid tank within or adjacent to the fuel tank, the fuel tank acts as a thermal mediator that blocks hot air from directly contacting the purification liquid.
2Ease of operation
If the urea water solution inlet and fuel inlet are arranged close to each other with a common cap, then workability during supply is improved, but there is risk of mistaken supply and scattering of liquids
Solution Approach 1:
The supply inlets are segmented into separate, distinct openings rather than using a common cap. The fuel inlet and liquid inlet are positioned at different locations with different orientations, creating physical separation that prevents mixing errors while maintaining ease of access for supply operations.
Solution Approach 2:
The inlets are designed with asymmetric characteristics - different shapes, orientations, or positions - that allow operators to easily distinguish between the fuel inlet and liquid inlet. This asymmetric design prevents mistaken supply while keeping the supply process simple and efficient.
3Volume of moving object
If the liquid tank is exposed to space below the vehicle body, then space utilization is improved, but no protection is provided against hot air from the engine
Solution Approach 1:
The liquid tank is positioned within the structural envelope of the fuel tank, utilizing the fuel tank's volume and positioning to create a protected niche. This nesting arrangement allows the liquid tank to occupy available space while being thermally protected by the fuel tank's location relative to the engine.
Solution Approach 2:
The fuel tank, which could be considered a separate component taking up space, is instead utilized as a protective shield. The very structure that occupies space becomes the thermal barrier that protects the liquid tank, converting a potential spatial conflict into a beneficial protective relationship.
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 fuel tank effectively blocks hot air from reaching the liquid tank, preventing expansion and mixing issues, while the heat exchanger maintains the reductant solution's stability, and the angled inlets simplify and secure the supply process, enhancing safety and efficiency.
Implementation Method 1
the tank is exposed to hot air from the engine, and this is disadvantageous for the urea water solution that expands when heated
Implementation Method 2
incorporating a heat exchanger for cooling
Data Source
Figure 1
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AI summary
A work vehicle includes an engine, a fuel tank that has a fuel supply inlet and stores engine fuel, and a liquid tank that has a liquid supply inlet and stores purification liquid that is used in purification of engine exhaust gas. The liquid tank is protected by the fuel tank so that the liquid tank is not directly exposed to hot air from the engine.