Engine Water Jacket with Dividing Blades for Exhaust Cooling
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Solution Overview
Problem
Existing engine cooling systems face inefficiencies in distributing cooling water effectively across the cylinder block and head, leading to suboptimal cooling performance and increased fuel consumption, particularly around high-temperature exhaust ports.
Innovation Solution
The engine incorporates a divided block water jacket with horizontal dividing blades and inserts that create a cross-flow design, allowing cooling water to flow from the exhaust side of the head water jacket to the intake side, eliminating the need for separate water chambers and reducing weight, while the water pump and control valve manage the flow to enhance cooling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling water passages are installed around the exhaust port in the cylinder head, then cooling performance around the exhaust port is improved, but device complexity increases
Solution Approach 1:
The block water jacket is divided into upper and lower parts using horizontal dividing blades and inserts with flow preventing protrusions. This segmentation allows independent control of cooling water flow in different regions, enabling targeted cooling of the exhaust port area without requiring complex additional passages throughout the entire system.
Solution Approach 2:
The patent implements cross-flow design specifically in the upper part of the block water jacket around the exhaust port, while the lower part uses conventional flow. This local differentiation provides enhanced cooling performance where it is most needed (exhaust port area) without unnecessarily complicating the entire cooling system.
2Temperature
If separate water chambers are added to improve cooling efficiency, then cooling performance is improved, but weight increases
Solution Approach 1:
The block water jacket is segmented into upper and lower parts using inserts and dividing blades rather than adding separate water chambers. This segmentation achieves independent temperature control and improved cooling efficiency while utilizing the existing water jacket space, thereby avoiding additional weight from extra chambers.
Solution Approach 2:
Instead of adding separate water chambers (adding volume/dimension), the patent creates flow separation within the existing water jacket volume using horizontal dividing blades and inserts. This dimensional reorganization of the flow paths achieves independent cooling zones without increasing the overall volume or weight of the cooling system.
3Device complexity
If cooling water flows through the block water jacket in a conventional manner, then system simplicity is maintained, but cooling efficiency around exhaust port is insufficient
Solution Approach 1:
The block water jacket is divided into upper and lower parts with the upper part implementing cross-flow design. This segmentation allows the system to maintain relative simplicity in the lower conventional flow region while achieving superior cooling efficiency in the upper exhaust port region through the cross-flow configuration.
Solution Approach 2:
The cross-flow cooling design is applied locally to the upper part of the block water jacket where the exhaust port is located, while the lower part maintains conventional flow. This localized improvement enhances cooling efficiency where it is most needed without requiring complete system redesign, thus maintaining overall system simplicity.
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 improves cooling efficiency, reduces fuel consumption, and increases knocking characteristics by ensuring effective cooling of both the cylinder block and head, resulting in enhanced performance and fuel efficiency without the need for additional water chambers.
Implementation Method 1
a water pump coupled to the cylinder block to pump cooling water to one end of the lower part of the exhaust side of the block water jacket
Implementation Method 2
cooling water flowing through the upper part of the block water jacket flows from the exhaust side of a head water jacket to the intake side
Data Source
AI summary
An engine having a water jacket may include a cylinder block in which cylinder liners forming a combustion chamber may be disposed from a first end to a second end of the cylinder block, and a block water jacket may be formed around the cylinder liners, a cylinder head having a head water jacket coupled to a top of the cylinder block, receiving cooling water from an exhaust side of the block water jacket and discharging cooling water to an intake side of the block water jacket, and inserts that may be inserted into the block water jacket and that may have horizontal dividing blades dividing the block water jacket into upper and lower parts, legs extending downward from the horizontal dividing blades, and flow preventing protrusions protruding upward from the horizontal dividing blades to divide the upper part of the block water jacket.