Internal Combustion Engine Oil Supply Inlet Offset Design
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Solution Overview
Problem
The existing oil supply inlet system for internal combustion engines is inefficient in supplying oil to the oil pan reservoir chamber, requiring a low introduction rate to avoid overflowing due to a short horizontal oil supply passageway, which prolongs the time needed to fill the chamber.
Innovation Solution
The system includes an obliquely downwardly extending oil supply inlet with a horizontally bent passageway connected to an offset oil pan inlet port, featuring a trapezoidal upstream end for air-oil separation and a downstream passageway with a smaller cross-sectional area to prevent air entry, allowing for a longer passageway and reduced introduction rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the horizontal oil supply passageway is made short to arrange components in a straight line, then the device complexity is reduced and manufacturing is easier, but the passageway cannot retain oil and requires low introduction rate, increasing the time to supply oil
Solution Approach 1:
The patent positions the oil pan inlet port offset from the vertical plane of the oblique oil supply inlet, creating a three-dimensional spatial relationship. This offset positioning allows the horizontal oil supply passageway to extend in a different spatial dimension, increasing its length and oil-retention capability without increasing overall device footprint, thereby enabling faster oil supply.
2Productivity
If the horizontal oil supply passageway is made elongate to retain oil, then the productivity is improved by reducing fill time, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The oil supply inlet is divided into distinct segments: an oblique oil supply inlet portion extending downward from the oil supply port, and a horizontal oil supply passageway portion extending horizontally from the lower end of the oblique portion. This segmentation allows each portion to be optimized independently for its specific function while simplifying the overall manufacturing process.
Solution Approach 2:
The patent applies different geometric characteristics to different portions of the oil supply inlet. The oblique portion has a specific inclination angle optimized for gravity-assisted flow, while the horizontal portion has an offset configuration optimized for oil retention. This local differentiation of geometric properties enables each section to perform its function optimally without complicating the entire structure.
3Productivity
If oil is introduced at a high rate to reduce fill time, then the productivity is improved, but oil may overflow from the passageway
Solution Approach 1:
The horizontal oil supply passageway is designed with sufficient length and offset positioning before oil introduction begins. This preliminary configuration ensures that the passageway is already in position to retain oil effectively, allowing high-rate introduction without overflow risk.
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 enables the oil supply system to maintain oil within the passageway, reducing the time required to fill the oil pan reservoir chamber without overflowing and enhancing air-oil separation, thus improving the efficiency of oil supply.
Implementation Method 1
the horizontal oil supply passageway bent and extending substantially horizontally from the lower end of the oil supply inlet that extends obliquely downwardly from the oil supply port at the upper end is connected to the oil pan inlet port disposed in the position offset from the vertical plane including the oblique oil supply inlet
Implementation Method 2
the horizontal oil supply passageway may have an upstream end to which the oil supply inlet is connected, a cross-sectional plane of the upstream end may be of a trapezoidal shape having an upper side connected to the oil supply inlet longer than a lower side thereof
Data Source
AI summary
There is provided an internal combustion engine in which oil can be kept in an oil passageway when oil is supplied, so that the time required to supply oil can be reduced. In an internal combustion engine in which an oil supply inlet for replenishing, with oil, an oil pan reservoir chamber disposed in a lower portion of a crankcase extends obliquely downwardly from an oil supply port at an upper end thereof, the oil pan reservoir chamber has an oil pan inlet port disposed in a position offset from a vertical plane, including the oblique oil supply inlet, and a horizontal oil supply passageway bent and extending substantially horizontally from a lower end of the oil supply inlet is connected to the oil pan inlet port.