EGR Cooler Coolant Guide for Uniform Tube Cooling
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Solution Overview
Problem
The existing cooled EGR system faces reduced cooling efficiency due to uneven coolant distribution within the EGR cooler, leading to potential boiling issues and increased material costs, which hinders the expansion of its applications.
Innovation Solution
Incorporating a tapered coolant guide that directs coolant from the engine's water jacket to the gaps between EGR cooler tubes, ensuring even distribution and improved cooling performance by dividing the space into sections to facilitate uniform coolant flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If coolant flows through the gap between adjacent tubes in the EGR cooler, then the EGR gas is cooled, but the coolant distribution becomes uneven causing peripheral tubes to be over-cooled while central tubes are under-cooled
Solution Approach 1:
A coolant guide structure is introduced as an intermediary component between the coolant inlet and the tube gaps. This guide structure actively directs and distributes coolant to multiple locations, ensuring uniform coolant supply to both peripheral and central tubes, thereby resolving the uneven distribution issue and improving overall cooling efficiency
Solution Approach 2:
The coolant guide structure provides different coolant flow paths and distribution characteristics to different regions of the EGR cooler. By creating localized flow channels that direct coolant specifically to areas needing cooling (both peripheral and central regions), the system achieves uniform temperature distribution across all tubes
2Ease of manufacture
If the EGR cooler is inserted into the cylinder block or cylinder head, then material cost is reduced, but the available space for coolant distribution is limited
Solution Approach 1:
The coolant guide structure utilizes the vertical dimension and three-dimensional space within the constrained volume of the cylinder block or head. By designing the guide structure to extend in multiple directions and utilize available vertical space, the system achieves effective coolant distribution without requiring additional horizontal space, thus maintaining cost-effectiveness while improving 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 solution enhances cooling performance by ensuring even coolant distribution across all tubes, reducing the risk of boiling and potentially lowering material costs, thus expanding the system's applicability.
Implementation Method 1
a coolant guide that guides a coolant to the plurality of tubes
Implementation Method 2
the coolant cools the EGR gas flowing through the tubes
Data Source
AI summary
An exhaust gas recirculation (EGR) cooler is provided and includes a plurality of tubes that are spaced apart from each other and a cavity that is disposed on an engine to receive the plurality of tubes. A coolant guide guides a coolant to the plurality of tubes and a cover then closes the cavity. The cavity has an inlet port that communicates with a water jacket of the engine and the cavity receives the coolant from the water jacket of the engine through the inlet port.