Urea Water Tank Ventilation Device Preventing Overflow
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Solution Overview
Problem
The existing urea water systems in diesel engine vehicles face issues with urea water overflowing due to increased pressure in the urea water tank, which is not efficiently relieved, leading to overflow when the leveling pipe is clogged and the urea water injection gun operation is stopped.
Innovation Solution
A device with an enhanced ventilation flow path, including an air communicating part and an exhaust hole with a sliding opening and closing member, provides a second ventilation path to efficiently relieve internal pressure in the urea water tank, preventing overflow by discharging air and reducing pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a urea water injection gun with smaller outer diameter is used to create ventilation space, then ventilation is realized through the space between injection hole inner surface and injection gun outer surface, but pressure relief is insufficient and urea water still overflows
Solution Approach 1:
The invention divides the ventilation function into two separate components: the original ventilation space between the injection gun and injection hole, and a newly added exhaust hole with an opening/closing member. This segmentation allows each component to perform its function optimally - the space provides initial ventilation while the exhaust hole provides additional pressure relief capability.
Solution Approach 2:
The exhaust hole is equipped with an opening/closing member that dynamically adjusts the ventilation path based on operational needs. The member opens the exhaust hole when the injection gun is inserted and closes it when removed, optimizing the ventilation system's response to different operational states and improving pressure relief effectiveness.
2Reliability
If pressure relief space is created between injection hole inner surface and injection gun outer surface, then some ventilation is achieved, but the space is insufficient to completely relieve the pressure generated in the tank
Solution Approach 1:
The ventilation system is segmented into multiple paths: the original annular space between the injection gun and injection hole, and the additional exhaust hole. This segmentation increases the total ventilation capacity and ensures adequate pressure relief that the single original path could not provide alone.
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 device effectively prevents urea water overflow by creating a secondary ventilation path that complements the primary path, ensuring pressure is managed within the tank, thus preventing urea water from overflowing even when the tank is full and the leveling pipe is clogged.
Implementation Method 1
air in the urea water tank flows into the internal space of air communicating part through a hole communicating with the inside of the urea water tank
Implementation Method 2
an elastic member pushing the exhaust hole opening and closing member
Data Source
AI summary
The present disclosure relates to a device for preventing overflow of urea water out of an injection hole of a urea water tank when urea water is injected into the injection hole. The device is configured to enhance the function of a ventilation flow path, thus efficiently relieving pressure in the urea water tank when urea water is injected into the urea water tank.