Coolant Reservoir Tank Segmented Flow Passages
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Solution Overview
Problem
Conventional reservoir tanks for coolant in internal combustion engines experience coolant leakage due to liquid surface vibration when traveling on rough roads, as the coolant flows directly upward and reaches the breathing hole, leading to increased component complexity and cost when attempting to mitigate this with labyrinth structures.
Innovation Solution
A reservoir tank design featuring a tank chamber with first, second, and third communication passages that disperse coolant flow upward, preventing it from reaching the breathing hole by guiding it through lateral and vertical passages, ensuring it does not leak, while maintaining a simpler configuration compared to labyrinth structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a labyrinth structure is formed near the breathing hole to suppress coolant leakage, then coolant leakage prevention is improved, but the number of component parts increases and manufacturing cost increases
Solution Approach 1:
The invention divides the auxiliary chamber into multiple segments (first auxiliary chamber and second auxiliary chamber) separated by a partition wall. Each chamber has its own breathing hole, distributing the ventilation function across multiple simpler components rather than using a single complex labyrinth structure. This segmentation reduces overall device complexity while maintaining reliable coolant containment.
2Productivity
If the cross-sectional area of the auxiliary chamber is increased to allow coolant flow, then coolant circulation is improved, but liquid surface vibration increases and coolant leakage occurs
Solution Approach 1:
The auxiliary chamber is segmented into first and second auxiliary chambers with separate breathing holes. This segmentation reduces the liquid surface area in each individual chamber, thereby suppressing liquid surface vibration while maintaining adequate coolant circulation capacity through the combined volume of both chambers.
Solution Approach 2:
A partition wall acts as an intermediary structure between the first and second auxiliary chambers. This partition wall with its associated breathing holes controls and regulates coolant flow between chambers, preventing direct uncontrolled flow paths that would cause liquid surface vibration and leakage, while still allowing necessary coolant circulation.
3Device complexity
If a single large auxiliary chamber is used, then device complexity is reduced, but coolant leakage occurs due to liquid surface vibration
Solution Approach 1:
Rather than using a single large auxiliary chamber, the invention employs two smaller auxiliary chambers (first and second auxiliary chambers) separated by a partition wall. Each chamber has its own breathing hole configuration. This segmentation approach prevents coolant leakage by reducing liquid surface vibration in each chamber while maintaining relatively simple overall device structure.
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
Effectively suppresses coolant liquid surface vibration and prevents leakage through the breathing hole, ensuring reliable operation without the need for complex labyrinth structures, while allowing easy coolant injection and replenishment.
Implementation Method 1
a first communication passage 6, a second communication passage 7, and a third communication passage 8 that respectively communicate with the opening 5 and the tank chamber 4... the coolant moves from the tank chamber through at least one of the first to third communication passages to the opening side on an upper side
Data Source
AI summary
The present invention relates to a reservoir tank for coolant that stores the coolant for cooling an internal combustion engine. The reservoir tank includes: a tank chamber that stores the coolant; an opening, which is disposed in an upper part of the tank chamber, through which the coolant flows in and flows out, and in a circumferential wall of which a breathing hole is formed; and a first communication passage, a second communication passage, and a third communication passage that respectively communicate with the opening and the tank chamber.