V-Type Engine Exhaust Layout for Thermal Shielding of Cooling Passages
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Solution Overview
Problem
In V-type engines, the heat from the exhaust passage can adversely affect the operation of electronic control components and intake portions due to their proximity in the upper portion of the engine.
Innovation Solution
The engine design includes a V-type configuration with exhaust passages positioned between the banks and extending in the front-rear direction, below cooling liquid passages, which helps to suppress the heat influence on surrounding components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the exhaust passage is disposed above the cooling liquid passages in a V-type engine, then the engine layout is compact and space-efficient, but the exhaust heat adversely affects the cooling liquid and surrounding components
Solution Approach 1:
The patent changes the spatial arrangement from a vertical stacking configuration (exhaust above cooling passages) to a horizontal layered configuration (exhaust below cooling passages). This dimensional reorganization maintains the compact V-type engine layout while eliminating the harmful thermal interaction by placing the heat-generating exhaust passage in a lower spatial zone where it cannot adversely affect the cooling liquid in the upper passages.
2Object-affected harmful factors
If the exhaust passage is moved below the cooling liquid passages to reduce heat influence, then the harmful heat effect is suppressed, but the engine layout complexity increases
Solution Approach 1:
The patent segments the engine's internal passages into distinct horizontal layers: the cooling liquid passages are positioned in an upper layer while the exhaust passage is positioned in a lower layer. This segmentation approach clearly separates the thermal zones, preventing heat transfer from exhaust to cooling liquid, while the modular layered structure actually simplifies the overall design compared to more complex three-dimensional routing arrangements.
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 effectively reduces the thermal impact on electronic components and intake systems by utilizing cooling liquid passages to manage heat from the exhaust, thereby maintaining optimal engine operation.
Implementation Method 1
a first cooling liquid passage and a second cooling liquid passage disposed between the first bank and the second bank
Implementation Method 2
cooling liquid passage...extending in a front-rear direction
Data Source
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AI summary
[Problem] To provide a technique, in a V-type engine, capable of suppressing the influence of heat from an exhaust passage on the surroundings. [Solution] An exemplary engine is a V-type engine including a first bank and a second bank arranged side by side in a leftright direction, the engine including: a first cooling liquid passage and a second cooling liquid passage disposed between the first bank and the second bank and extending in a front-rear direction; and an exhaust passage disposed between the first bank and the second bank and extending in a front-rear direction and disposed below the first cooling liquid passage and the second cooling liquid passage.