Inline Engine Cooling Channel Segmentation for Cylinder Temperature Uniformity
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Solution Overview
Problem
Existing internal combustion engine cooling systems experience a decline in cooling performance from the upstream to the downstream part of the water jacket, leading to non-uniform cylinder cooling and temperature variations.
Innovation Solution
The engine features a cooling channel configuration with separate inner and outer channels on each side wall, where the second cooling medium maintains high performance by flowing through the second outer channel, connected to the second inner channel via connection channels, ensuring uniform cooling across multiple cylinders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If cooling water flows sequentially along multiple cylinders in turn, then the cooling channel structure is simple, but the cooling performance decreases from upstream to downstream causing non-uniform cylinder cooling
Solution Approach 1:
The cooling channel is segmented into multiple independent parallel channels (first inner channel, first outer channel, second inner channel, second outer channel) that flow cooling water simultaneously to different cylinder positions. This segmentation allows each channel to maintain independent cooling performance, preventing the temperature degradation that occurs in sequential flow systems.
Solution Approach 2:
Different channels are positioned to provide optimized cooling to specific local areas: inner channels cool the side walls directly while outer channels cool the outer surfaces. This local quality differentiation ensures uniform cooling distribution across all cylinders by addressing the specific thermal needs of each region.
2Area of stationary object
If the cooling channel is arranged to cool all cylinders, then comprehensive cooling coverage is achieved, but temperature variation between cylinders increases due to downstream temperature rise
Solution Approach 1:
The cooling system transitions from a single-dimension sequential flow to a multi-dimensional parallel flow architecture. Multiple channels flow in parallel dimensions, allowing cooling water to reach all cylinders simultaneously at similar temperature levels, thereby maintaining uniform cooling across the entire cooling coverage area.
Solution Approach 2:
Multiple cooling channels are merged into a unified cooling system that works synergistically. The inner and outer channels on each side wall combine to provide comprehensive cooling coverage, while the parallel architecture ensures that temperature variation between cylinders is minimized.
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 maintains high cooling performance and reduces temperature variations between cylinders by ensuring consistent cooling medium flow rates and temperatures, enhancing overall engine cooling efficiency.
Implementation Method 1
a cooling channel arranged around a side wall of the cylinder structure, and through which a cooling medium flows
Data Source
AI summary
A cylinder structure includes cylinders arranged inline. A cooling channel facing a first side wall of the cylinder structure includes a first inner channel and a first outer channel. The first inner channel is arranged for a first cooling medium to flow through. The first outer channel is away from the first side wall than the first inner channel is, and arranged for a second cooling medium to flow through. A cooling channel facing a second side wall of the cylinder structure includes a second outer channel and a second inner channel. An upstream part of the second outer channel is connected to a downstream part of the first outer channel. The second inner channel is close to the second side wall than the second outer channel is. Connection channels connecting between the second outer channel and the second inner channel are respectively provided at positions facing the cylinders.