Cylinder Head Coolant Inlet Segmentation for Combustion Chamber Cooling
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Solution Overview
Problem
Current cylinder head designs face challenges in intensively supplying coolant to the combustion chamber side, leading to reduced coolant flow speed and increased metal surface temperatures, which result in knocking and unstable combustion.
Innovation Solution
A cylinder head design featuring separated combustion chamber and exhaust coolant inlets, with a unique head water jacket configuration that includes a lower, side, and upper jacket, along with specific rib formations and flow channels, ensures coolant flows to the combustion chamber in an expanded state, enhancing cooling performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If coolant is distributed to both combustion chamber side and exhaust manifold side through a single inlet, then the structure is simple, but the amount of coolant supplied to the combustion chamber side is insufficient
Solution Approach 1:
The single coolant inlet is segmented into two separate inlets: a combustion chamber coolant inlet and an exhaust coolant inlet. This segmentation allows independent control of coolant flow to each region, enabling increased coolant supply to the combustion chamber side without compromising structural simplicity
2Device complexity
If coolant flow path is shared between combustion chamber and exhaust manifold, then the structure is compact, but coolant flow speed is reduced
Solution Approach 1:
The shared coolant flow path is segmented into separate flow channels: a combustion chamber flow channel and an exhaust flow channel. This separation ensures that coolant flows independently through each channel, maintaining high flow speed in the combustion chamber channel while keeping the overall structure compact
3Ease of operation
If coolant flow speed is reduced in the water jacket, then the structure allows easy flow distribution, but temperature of coolant increases rapidly
Solution Approach 1:
Different flow distribution characteristics are provided in different regions: the combustion chamber side receives high-speed coolant flow through a dedicated inlet and channel for effective cooling, while the exhaust manifold side has its own flow path. This local differentiation allows easy flow distribution overall while preventing rapid temperature increase in the combustion chamber region
4Device complexity
If coolant flow to combustion chamber is insufficient, then the system operates with simple coolant distribution, but metal surface temperature of combustion chamber increases locally
Solution Approach 1:
The coolant distribution system is segmented to provide dedicated coolant supply to the combustion chamber through a separate inlet and flow channel. This segmentation ensures sufficient coolant flow to the combustion chamber, effectively controlling metal surface temperature without excessive system complexity
Solution Approach 2:
Enhanced coolant flow and cooling capability are provided locally at the combustion chamber region through the dedicated combustion chamber coolant inlet and optimized flow channel, while other regions maintain standard cooling. This local quality enhancement effectively reduces metal surface temperature where needed most
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 design increases coolant flow rate to the combustion chamber, reduces metal surface temperatures, and improves cooling performance, thereby stabilizing combustion and increasing engine torque and driving performance.
Implementation Method 1
coolant absorbing heat from the engine while circulating in the water jacket
Implementation Method 2
introduced to a radiator, in which heat exchange is performed
Implementation Method 3
the combustion chamber coolant inlet and the exhaust coolant inlet being separated from each other such that the coolant introduced through the combustion chamber coolant inlet flows to the combustion chamber side in an expanded state
Data Source
AI summary
A cylinder head configured for dividing coolant introduced thereinto to a combustion chamber side and an exhaust manifold side to increase the amount of coolant introduced to the combustion chamber side, improving cooling performance, may include a head water jacket having a combustion chamber coolant inlet, through which coolant is introduced from a cylinder block to a combustion chamber side, and an exhaust coolant inlet, through which the coolant is introduced from the cylinder block to an exhaust manifold side, the combustion chamber coolant inlet and the exhaust coolant inlet being separated from each other such that the coolant introduced through the combustion chamber coolant inlet flows to the combustion chamber side in an expanded state.