Internal Combustion Engine Cooling Structure Flow Regulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing cooling structure for internal combustion engines often results in insufficient cooling water flow rates to the exhaust side, leading to inadequate cooling of the cylinder bore wall, particularly near the combustion chamber, due to the division of cooling water flow between the intake and exhaust sides.
Innovation Solution
A cooling structure with a regulation portion integrated with a spacer in the cylinder block, which dams up or throttles the cooling water flow to ensure a larger flow rate to the exhaust side by regulating the flow to the cylinder head side, preventing overcooling near the cooling water introducing port and optimizing the flow distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling water flow is divided between intake side and exhaust side without flow regulation, then cooling water can reach both sides of the cylinder bore wall, but the flow rate to the exhaust side becomes insufficient leading to inadequate cooling
Solution Approach 1:
The patent applies local quality by providing different flow channel cross-sectional areas in different regions of the water jacket. Specifically, the flow channel cross-sectional area on the exhaust side is made larger than that on the intake side, creating locally optimized flow distribution that ensures sufficient cooling water supply to the exhaust side while maintaining appropriate flow to the intake side.
Solution Approach 2:
The patent changes the geometric parameter of the flow channel by adjusting the cross-sectional area ratio between the exhaust side and intake side. This parameter change directly influences the flow rate distribution, ensuring that the exhaust side receives adequate cooling water flow despite the branching flow path.
2Temperature
If cooling water flow rate to exhaust side is increased to improve cooling, then cooling capability of cylinder bore wall on exhaust side improves, but flow rate to cylinder head side may become insufficient
Solution Approach 1:
The patent implements local quality optimization by creating distinct flow channel characteristics in different regions. The water jacket is designed with larger cross-sectional area on the exhaust side to prioritize cooling water supply to the exhaust side, while the intake side maintains adequate flow through its own flow path, thus locally optimizing cooling for each region without compromising the other.
3Quantity of substance
If regulation portion is provided to control cooling water flow distribution, then flow rate to exhaust side can be ensured, but device complexity increases
Solution Approach 1:
The patent avoids complex regulation portions by instead applying local quality principles directly to the water jacket geometry. The flow distribution is controlled through locally optimized cross-sectional areas in different regions of the water jacket, eliminating the need for additional regulation mechanisms while achieving the desired flow rate distribution.
Solution Approach 2:
The patent extracts the flow regulation function from a separate regulation portion and integrates it directly into the water jacket structure itself. By incorporating the flow distribution control within the water jacket geometry through varying cross-sectional areas, the design eliminates the need for separate regulation components, thus reducing overall device complexity.
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 ensures a sufficient cooling water flow rate to the exhaust side, enhancing the cooling capability of the cylinder bore wall, particularly near the combustion chamber, while maintaining the necessary flow rate to the cylinder head side.
Implementation Method 1
The flow of cooling water introduced from the cooling water introducing port cools the cylinder bore wall heated by heat from the combustion chambers
Implementation Method 2
The cooling water from the water jacket of the cylinder block flows into the water jacket of the cylinder head
Data Source
AI summary
A cooling structure of an internal combustion engine includes: a cooling water introducing port provided on one end side of a cylinder block; and a water jacket provided so as to surround a cylinder bore wall, wherein cooling water is introduced from the cooling water introducing port into the water jacket, the cooling water is branched to flow to a portion on an intake side and a portion on an exhaust side of the water jacket of the cylinder block of the internal combustion engine, and the cooling water is supplied from a cylinder block side to a cylinder head side, the cooling structure of the internal combustion engine, further comprising a first regulation portion that regulates a flow of the cooling water supplied to the cylinder head side.