Crankcase Ventilation Oil Separator Valve Body
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Solution Overview
Problem
Existing devices for separating oil particles from crankcase ventilation gas in internal combustion engines have low separation efficiency for fine particles and require complex designs or high technical effort, with limited ability to adjust gas volume flow.
Innovation Solution
A device with a valve body forming the impact surface, preloaded to adjust with differential pressure, featuring a grid-like or perforated plate structure dividing the inflow cross-section into multiple partial cross-sections for sharp flow deflection and enhanced centrifugal separation of oil particles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a bypass channel with opening/closing means is used to adjust gas volume flow, then gas flow control is achieved, but the device complexity increases and oil separation efficiency decreases
Solution Approach 1:
The inflow cross-section is divided into multiple partial inflow cross-sections arranged in parallel, allowing independent control of each section's opening area to adjust gas volume flow while maintaining simple impact separation structure
Solution Approach 2:
The valve body serves dual functions: as the impact surface for oil separation and as the flow control element for gas volume adjustment, eliminating the need for separate bypass channel components
2Adaptability or versatility
If a bypass channel with means for opening and closing is provided, then gas flow control is possible, but the oil separation effect becomes relatively poor
Solution Approach 1:
The inflow cross-section is divided into multiple partial inflow cross-sections that can be independently controlled, allowing optimization of flow distribution to the impact surface while maintaining effective oil separation
Solution Approach 2:
The valve body integrates both flow control and impact surface functions, ensuring that gas flow adjustment does not compromise oil separation effectiveness
3Reliability
If the inflow cross-section is divided into multiple partial inflow cross-sections, then flow deflection and centrifugal separation are enhanced, but the device complexity increases
Solution Approach 1:
The inflow cross-section is divided into multiple partial inflow cross-sections arranged in parallel, each contributing to enhanced flow deflection and centrifugal separation while maintaining manageable structural complexity
Solution Approach 2:
The multiple partial inflow cross-sections are integrated into a single valve body structure, combining flow control and impact surface functions in one component to avoid additional complexity
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
Significantly improves oil separation efficiency for fine particles with simple design and low technical effort, while also controlling gas volume flow, maintaining pressure within target ranges and preventing hydrocarbon emissions.
Implementation Method 1
the impact surface being formed on a valve body which is located behind the partial inflow cross-sections, viewed in the direction of flow of the crankcase ventilation gas, and which is preloaded with a force in the closing direction and which is caused by the differential pressure between the crankcase and the intake tract can be adjusted in the opening direction against the pre-loading force by means of the crankcase ventilation gas
Implementation Method 2
A device with a valve body forming the impact surface, preloaded to adjust with differential pressure, featuring a grid-like or perforated plate structure dividing the inflow cross-section into multiple partial cross-sections for sharp flow deflection and enhanced centrifugal separation of oil particles
Implementation Method 3
sharp flow deflection and enhanced centrifugal separation of oil particles
Data Source
Figure 1~6
Figure 7
Figure 8~9
AI summary
The invention relates to a device (1) for eliminating oil particles (17) from the crankcase ventilation gas of an internal combustion engine (10), said device being located in the flow duct (11) of the gas that runs from the crankcase (12) to an induction tract (13) of the internal combustion engine (10). The device (1) comprises an oil separator (2) in the form of an outlet (20) for the gas with a deflection of the flow, causing the oil particles (17) to be deposited on a baffle surface (30) and thus to be eliminated from the crankcase ventilation gas flow. The device is characterised in that an infeed cross-section (21), which lies upstream of the baffle surface (30) when viewed from the flow direction of the crankcase ventilation gas, is sub-divided into several infeed sub-sections (22, 22'), the baffle surface (30) is a solid surface that is devoid of perforations and said baffle surface (30) is configured on a valve body (3), which lies downstream of the infeed sub-sections (22, 22') when viewed in the flow direction of the gas and which is pre-tensioned by a force. The valve body can be displaced in the opening direction in opposition to the pre-tension, as a result of the differential pressure in the gas between the crankcase (12) and the induction tract (13).