Folded Intake Port System for Compact Engine Design
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Solution Overview
Problem
Existing internal combustion engines with intake devices face challenges in achieving a simple and compact structure while ensuring effective sealing and minimizing flow resistance, particularly in utilizing the available installation space efficiently.
Innovation Solution
The intake device features a port system with sections guided in the air trunking, where the flow direction in each section is aligned with the longitudinal center axis, allowing for opposite directions in different sections, enabling a compact design and easy sealing, with the air trunking extending through the air filter to optimize space usage and incorporating a deflecting section with a curved face to maintain low flow resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the port is extended into the air filter to achieve a long port length, then the pressure wave influence is improved, but the device complexity and sealing difficulty increase
Solution Approach 1:
The port is arranged in a folded manner within the air trunking, changing from a straight linear arrangement to a multi-dimensional folded configuration. This allows the port to achieve a long effective length while fitting within the compact three-dimensional space of the air filter housing, thereby improving pressure wave influence without proportionally increasing device complexity
Solution Approach 2:
The port sections are nested within the air trunking structure, with the folded port configuration integrated into the existing air filter housing. This nesting approach allows the port to be accommodated within the available space without requiring additional external components, maintaining device simplicity while achieving the desired port length
2Productivity
If the port is extended into the air filter to achieve a long port length, then the pressure wave influence is improved, but the sealing difficulty increases
Solution Approach 1:
The port sections are nested within the air trunking structure, which provides a enclosed pathway. This nesting configuration naturally contains the port within a defined boundary, making it easier to seal against the environment and preventing bypass air leakage compared to external port arrangements
Solution Approach 2:
By arranging the port in a folded configuration within the air trunking, the sealing surfaces are concentrated within the enclosed air trunking structure rather than extending externally. This concentrates the sealing requirements to specific interfaces within the air trunking, simplifying the overall sealing strategy while maintaining long port length for pressure wave influence
3Volume of moving object
If the port flow direction is aligned with the longitudinal center axis in opposite directions, then the compact structure is improved, but the flow resistance may increase
Solution Approach 1:
The deflecting section incorporates a curved deflecting face that smoothly guides the flow from the first direction to the second direction. This curved transition minimizes flow separation and turbulence, reducing flow resistance while enabling the port to change direction and achieve a compact folded configuration within the air trunking
Solution Approach 2:
The port is divided into multiple sections (first section, deflecting section, second section) with distinct functions. The deflecting section acts as an intermediate element that smoothly transitions the flow between the two opposite directions aligned with the longitudinal center axis. This segmentation allows each section to be optimized for its specific function, maintaining low flow resistance while achieving compact overall structure
Data Source
AI summary
An internal combustion engine has an intake device having an air filter and at least one port. Combustion air is sucked in from the clean side of the air filter to the internal combustion engine via the port. The intake device has air trunking, in which at least a first section and a second section of the port are guided. The air trunking has a longitudinal center axis, wherein combustion air flows in the first section of the port in a first direction of flow running in the direction of the longitudinal center axis. The combustion air flows in the second section of the port in a second direction of flow oriented in an opposite direction to the first direction of flow and in the direction of the longitudinal center axis. As a result, a compact overall size is achieved with port length.