Crankcase Gas Cleaner Direct Mount Valve Cover
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Solution Overview
Problem
Existing crankcase gas cleaners for internal combustion engines require external lines for gas delivery and take a long time to reach operating temperature, especially in cold conditions, leading to issues with condensation and blockages.
Innovation Solution
A centrifugal separator device with direct mounting on the valve cover, featuring a gas inlet that communicates directly with the crankcase gas space, and a hydraulically driven rotor supported in a turbine housing, allowing rapid heating and eliminating the need for external lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the crankcase gas cleaner is mounted externally with separate feed lines, then the device structure is simple and easy to manufacture, but it requires external lines for gas delivery and takes a long time to reach operating temperature
Solution Approach 1:
The gas cleaner is merged with the valve cover to form an integrated unit. The housing is designed with a mounting flange that directly attaches to the valve cover, eliminating the need for external mounting and separate feed lines. The gas inlet opens directly into the crankcase through the valve cover integration, creating a compact combined structure that solves both the heating time issue and structural complexity.
Solution Approach 2:
The centrifugal separator components (rotor, separating discs, turbine wheel) are nested within the housing that is itself integrated with the valve cover. The rotor is supported by bearings housed within the turbine housing, which is contained within the main housing. This nested arrangement maximizes space utilization and enables rapid heating while maintaining a compact integrated structure.
2Ease of manufacture
If the crankcase gas cleaner is mounted externally, then the components can be separately manufactured and assembled, but it requires separate insulation and takes a long time to heat up in cold conditions
Solution Approach 1:
By merging the gas cleaner housing with the valve cover, the entire assembly benefits from the engine's operating heat directly. The integrated structure eliminates gaps and thermal bridges that would exist in externally mounted systems, enabling rapid heating to operating temperature while still allowing modular assembly of the cleaner components onto the pre-heated valve cover.
Solution Approach 2:
The valve cover acts as a self-heating element that provides thermal energy to the gas cleaner components. The hot crankcase gases and engine operation naturally heat the valve cover, which in turn heats the integrated gas cleaner without requiring external insulation or separate heating systems. The structure serves its own thermal needs.
3Adaptability or versatility
If external feed lines are used for crankcase gas delivery, then the device can be independently positioned, but it increases the risk of condensation and blockages
Solution Approach 1:
The gas inlet path is merged with the valve cover structure, creating a direct, short, and heated pathway from the crankcase to the centrifugal separator. This eliminates long external feed lines that would be prone to condensation and blockages. The integrated design maintains positioning flexibility through the mounting flange while ensuring reliable gas flow through the heated valve cover passage.
4Extent of automation
If the rotor is hydraulically driven by a turbine wheel, then the separator can operate without external power, but the turbine wheel must be protected from separated oil
Solution Approach 1:
The turbine wheel and rotor are extracted as separate functional components with distinct protection mechanisms. The turbine wheel is housed in a separate turbine housing that isolates it from the separated oil collection area. Oil seals and directional flow design extract the harmful oil away from the turbine wheel while allowing the turbine to remain exposed to crankcase gas for self-driven operation.
Data Source
AI summary
Device for cleaning crankcase gases from an internal combustion engine by means of a centrifugal separator (14), comprising a housing (16) with a rotor (22), which is rotatably supported in the housing and has a plurality of tightly separated separating discs (20). The housing (16) has an interface surface, which is designed for direct mounting of the housing (16) over a corresponding opening in a valve cover of the internal combustion engine.