Liquid-Cooled Engine Cooling Jacket Segmentation
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Solution Overview
Problem
Existing large, high-performance engines face challenges in achieving uniform and efficient heat dissipation from thermally stressed areas with minimal manufacturing effort.
Innovation Solution
The engine design incorporates a block cooling jacket with two separate cooling jackets surrounding the cylinder liner, connected by flow passages that traverse diametrically opposed longitudinal sides, and a coolant flow path that transversely intersects the engine's longitudinal plane, ensuring comprehensive cooling around the cylinder liner and effective heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a single cooling chamber design is used in the cylinder head, then the structure is simple, but uniform cooling of thermally stressed areas cannot be achieved
Solution Approach 1:
The cooling chamber is divided into a first cooling chamber and a second cooling chamber that are spatially separated and independently controllable. This segmentation allows different cooling strategies to be applied to different regions, achieving uniform cooling across thermally stressed areas while maintaining manageable structural complexity through modular design
2Temperature
If coolant flow path is extended to cover all thermally stressed areas, then cooling effectiveness improves, but manufacturing complexity increases
Solution Approach 1:
By dividing the cooling system into two separate chambers with distinct inlet and outlet connections, the patent enables independent optimization of flow paths for different thermal zones. This segmentation allows manufacturers to fabricate each chamber separately using standardized processes, reducing overall manufacturing complexity while ensuring comprehensive cooling coverage
Solution Approach 2:
Each cooling chamber is designed with specific flow path characteristics tailored to its thermal requirements. The first cooling chamber addresses certain thermally stressed areas while the second chamber addresses others, allowing localized optimization of cooling effectiveness without requiring a single complex flow path that would be difficult to manufacture
3Temperature
If separate cooling chambers are introduced for different thermal zones, then targeted cooling is achieved, but system complexity increases
Solution Approach 1:
The cooling system is segmented into two independently controllable chambers, each capable of targeted cooling for specific thermal zones. This segmentation achieves the desired targeted cooling capability while keeping system complexity manageable through modular architecture that can be independently designed, manufactured, and maintained
Solution Approach 2:
Both cooling chambers utilize the same basic structural design and cooling mechanism, allowing the system to achieve targeted cooling for different zones while maintaining design universality. This multi-functionality with a standardized approach reduces the actual complexity increase that would result from completely different cooling systems for each zone
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 achieves optimal and uniform cooling of both the cylinder head and cylinder block, particularly focusing on thermally critical areas, with a structurally compact and efficient coolant flow path.
Implementation Method 1
the coolant is supplied via an inlet channel in the cylinder block, flows through a cooling chamber surrounding the cylinder in the cylinder block
Implementation Method 2
flows through a cooling chamber surrounding the cylinder in the cylinder block and is supplied directly to the upper partial cooling chamber of the cylinder head
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a liquid-cooled internal combustion engine (1), comprising: - a cylinder head (2) having a top-down cooling concept, with a head cooling chamber (15) with a first head partial cooling chamber (16) spaced apart from the fire deck (4) and with a second head partial cooling chamber (17), which adjoins the fire deck (4) of the cylinder head (2) and is separated from the first head partial cooling chamber (16) by an intermediate deck (18), the first head partial cooling chamber (16) and the second head partial cooling chamber (17) being fluidically interconnected, in the region of a central component (19), by means of a passage channel (21) in the intermediate deck (18); - a main feed channel (32), which is disposed in the cylinder block (3) and is connected to the first head partial cooling chamber (16) by means of a first flow passage (34) in the fire deck (4) of the cylinder head (2) and by means of a supply channel (35); - a block cooling jacket (41), which is fluidically connected to the second head partial cooling chamber (17) by means of a second flow passage (36) in the fire deck (4) of the cylinder head (2). According to the invention, in order to improve the cooling, the block cooling jacket (41) has a first block partial cooling jacket (29), which is near the fire deck (4) and into which the second flow passage (36) leads, and a second block partial cooling jacket (30), which is separated from the first block partial cooling jacket (29) and is remote from the fire deck (4), the first block cooling jacket (29) being fluidically connected to the second block cooling jacket (30) by means of a third flow passage (37) which is diametrically opposite the second flow passage (36), and the second block partial cooling jacket (30) being connected to a main discharge channel (33) which is disposed in the cylinder block (2).