Engine Coolant Cross-Flow Design for Uniform Cylinder Cooling
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Solution Overview
Problem
The existing coolant circulation systems for engines, which rely on upward and downward coolant flow through a water jacket, face inefficiencies due to the complex shape of the water jacket, leading to non-uniform cylinder cooling and increased weight from high-capacity electronic water pumps, which conflicts with the goal of improving fuel efficiency.
Innovation Solution
A coolant circulation system that incorporates a cross flow design, featuring an intake block water jacket, exhaust block water jacket, intake side chamber, exhaust side chamber, and a head water jacket, allowing coolant to circulate in the length direction of the engine, thereby improving cooling efficiency while minimizing the electronic water pump's capacity and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a water jacket with complicated shape is used to cool the engine, then the cooling coverage is improved, but the flow resistance increases and cooling uniformity deteriorates
Solution Approach 1:
The water jacket is divided into multiple separate jackets (intake block water jacket, exhaust block water jacket, head water jacket) that are arranged in parallel rather than one complicated continuous jacket. Each jacket serves a specific zone, simplifying the overall structure while maintaining comprehensive cooling coverage.
Solution Approach 2:
The coolant flow path is extended from simple upward-downward motion to include lateral cross-flow through the introduction of side chambers. The intake side chamber and exhaust side chamber enable coolant to move horizontally across the cylinder block, adding a dimensional aspect to the cooling path that improves uniformity without increasing complexity.
2Device complexity
If coolant flows only upward and downward through the water jacket, then the system structure is simple, but cooling uniformity across cylinders deteriorates
Solution Approach 1:
The cooling system is segmented into multiple independent water jackets (intake block, exhaust block, head) and side chambers, allowing each segment to be optimized for its specific function while collectively achieving uniform cooling across all cylinders.
Solution Approach 2:
The coolant circulation is extended from vertical flow to include horizontal cross-flow through side chambers. This multi-directional flow pattern ensures that heat is dissipated more uniformly across all cylinders by exposing different zones to cooled coolant.
3Temperature
If a high-capacity electronic water pump is used to increase cooling efficiency, then the engine cooling performance is improved, but the vehicle weight increases
Solution Approach 1:
The cooling system is divided into multiple parallel water jackets and chambers, increasing the total heat dissipation surface area and improving cooling efficiency without requiring a larger pump. Each segment contributes to overall cooling, allowing the use of a smaller, lighter pump.
Solution Approach 2:
The cross-flow design through side chambers creates additional flow paths that enhance cooling efficiency. This multi-directional circulation improves heat transfer effectiveness, allowing reduced pump capacity while maintaining adequate cooling performance.
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 cross flow design enhances engine cooling efficiency, reduces the need for a large electronic water pump, and decreases vehicle weight, thereby improving fuel efficiency.
Implementation Method 1
a water pump for supplying coolant to the engine
Implementation Method 2
the coolant supplied to the engine may cool the cylinder block while circulating in the length direction of the engine along the intake side chamber and the exhaust side chamber
Implementation Method 3
a radiator provided to cool the coolant that passes through the intake block water jacket, the exhaust block water jacket, the intake side chamber, the exhaust side chamber, and the head water jacket
Data Source
AI summary
A coolant circulation system for an engine efficiently cools the engine to prevent the capacity of an electronic water pump from being excessively increased. The system includes: a water pump; a cylinder block; a cylinder head; an intake block water jacket formed on one side of the cylinder block; an exhaust block water jacket formed on another side of the cylinder block; an intake side chamber provided on one surface of the cylinder block in a length direction of the engine about which a plurality of cylinders are arranged in parallel; an exhaust side chamber provided on the other surface of the cylinder block; and a head water jacket formed in the cylinder head to allow the intake block water jacket and the exhaust block water jacket to communicate with each other and the intake side chamber and the exhaust side chamber to communicate with each other.