Oil Separator Blow-by Gas Inlet Structure with Segmented Ribs
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Solution Overview
Problem
Conventional blow-by gas inlet structures in oil separators for internal combustion engines fail to effectively block oil splashed by intake and exhaust camshafts, allowing oil to enter the blow-by gas inlet opening from gaps on either side of the oil blocking plate.
Innovation Solution
A blow-by gas inlet structure with a plate forming the bottom wall of the oil separator, featuring a blow-by gas inlet opening divided into front and rear openings by an oil blocking structure with transverse and longitudinal ribs, which extend perpendicular and parallel to the inlet openings, respectively, to block oil from entering the separator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an oil blocking plate is provided below the blow-by gas inlet opening to block oil, then oil blocking capability is improved, but oil can still enter through open zones at both sides of the plate
Solution Approach 1:
The oil blocking plate is segmented by adding transverse ribs and longitudinal ribs that divide it into multiple sections. The transverse ribs extend in the transverse direction and the longitudinal ribs extend in the longitudinal direction, creating a grid-like structure that segments the plate into multiple zones. This segmentation prevents oil from bypassing the blocking plate through continuous open zones, as oil must now navigate through multiple blocked pathways rather than finding a continuous gap at the sides of a single flat plate.
Solution Approach 2:
The invention transitions from a two-dimensional flat blocking plate to a three-dimensional structured blocking surface by adding transverse and longitudinal ribs that protrude into the blow-by gas inlet opening. These ribs create multiple levels and zones within the blocking plate structure, effectively utilizing the third dimension (depth into the opening) to enhance oil blocking capability. The ribs create a multi-layered barrier that oil must penetrate through, rather than simply passing over a single flat surface.
2Reliability
If the blow-by gas inlet opening is divided into front and rear openings by the oil blocking structure, then oil blocking effectiveness is improved, but the structure becomes more complex
Solution Approach 1:
The blocking structure is segmented into functional zones using transverse ribs and longitudinal ribs that are integrated into a single blocking plate component. The transverse ribs divide the plate transversely while longitudinal ribs divide it longitudinally, creating front and rear openings as well as side zones. This segmentation is achieved within a single integrated structure rather than multiple separate components, thereby improving oil blocking effectiveness while limiting the increase in overall structural complexity.
Data Source
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AI summary
A blow-by gas inlet structure of an oil separator adapted to be placed above a cam chamber of an internal combustion engine, comprises a plate that forms a bottom wall of the oil separator; a blow-by gas inlet opening that is formed in the plate; an oil blocking structure that is provided below the blow-by gas inlet opening in a manner to divide the blow-by gas inlet opening into front and rear inlet openings through which the blow-by gas is led into the oil separator, the front and rear inlet openings being arranged in a first direction; and a transverse rib that is provided on the oil blocking structure and extends in a second direction that is perpendicular to the first direction.