Engine Oil Filter Layout for Short Hydraulic Oil Passages
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Solution Overview
Problem
Internal combustion engines with hydraulic clutches and oil filters face challenges in miniaturization due to the large size and length of oil passages caused by the overlap of oil filters with hydraulic pressure adjustment apparatuses and oil pumps, leading to increased engine dimensions.
Innovation Solution
The oil filter is positioned on the oil pan at a lower location, not overlapping with the oil pump and hydraulic pressure adjustment apparatus, allowing for a neighboring relationship without significantly increasing oil passage length, with the hydraulic pressure sensor fixed to the oil pan for external operation and wiring, and passages disposed in parallel to minimize space occupation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the oil filter is disposed in the crankcase overlapping with the hydraulic pressure adjustment apparatus and oil pump, then the oil filter can be positioned within the engine structure, but the crankcase width increases and the oil passage length increases
Solution Approach 1:
The oil filter is repositioned from the crankcase to the oil pan, utilizing the vertical dimension below the hydraulic components. This dimensional relocation allows the filter to be positioned in the lower region of the engine, separating it from the oil pump and hydraulic pressure adjustment apparatus horizontally, thus reducing oil passage length while maintaining compact engine dimensions.
2Device complexity
If the oil filter is disposed in the crankcase overlapping with the hydraulic pressure adjustment apparatus, then the oil filter can be integrated into the engine structure, but the crankcase width increases
Solution Approach 1:
The oil filter is relocated to the oil pan in the lower region of the engine, utilizing vertical space below the hydraulic components. This dimensional relocation eliminates the need for increased crankcase width while maintaining structural integration, as the filter is positioned in the lower assembly area rather than expanding the crankcase horizontally.
3Ease of manufacture
If the oil filter is positioned near the outer side of the crankcase, then the oil filter can be disposed within the engine, but the oil passage length significantly increases
Solution Approach 1:
The oil filter is extracted from the crankcase assembly and repositioned to the oil pan. This separation removes the filter from the constrained crankcase space, allowing it to be positioned in the lower region where it can be easily accessed for installation and maintenance, while simultaneously reducing oil passage length by positioning it near the oil pump.
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 miniaturization of the internal combustion engine by reducing oil passage length and engine width, allowing for efficient oil filtration and hydraulic pressure management without increasing the engine's overall size, and facilitates easier maintenance and reduced space occupation.
Implementation Method 1
an oil filter (71) is configured to purify the oil to be fed under pressure from the oil pump (105) to the hydraulic pressure adjustment apparatus (75)
Data Source
AI summary
An internal combustion engine which can be miniaturized, even where it includes an oil filter between a hydraulic clutch and an oil pump, without significantly increasing the length of an oil passage for the hydraulic clutch, the oil pump and a hydraulic pressure adjustment apparatus. A second oil filter is provided on an oil pan at a lower portion of the internal combustion engine so as to be disposed at a position at which the second oil filter does not overlap with any of a controlling oil pump and a hydraulic pressure adjustment apparatus as viewed in side elevation and which is lower than those of the oil pump and the hydraulic pressure adjustment apparatus.