Positive Crankcase Ventilation Chamber with Segmented Flow Paths
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current engine positive crankcase ventilation systems face challenges in effectively managing blowby gases, which can lead to contamination and reduced engine performance due to inadequate ventilation and separation of air and oil within the crankcase.
Innovation Solution
The engine assembly incorporates a cylinder head cover assembly with a positive crankcase ventilation chamber and a separator, featuring multiple outlet flow paths and valves that communicate with the intake assembly, allowing for controlled flow of gases between the crankcase and intake system, ensuring efficient ventilation and separation of air and oil.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a traditional single outlet positive crankcase ventilation system is used, then the structure is simple, but the ventilation efficiency and oil-air separation performance are inadequate
Solution Approach 1:
The patent divides the single outlet ventilation system into multiple outlet flow paths (first outlet flow path and second outlet flow path) with separate valves. This segmentation allows different regions of the crankcase to be vented through dedicated paths, improving ventilation efficiency and oil-air separation performance while managing the increased structural complexity through modular design
2Reliability
If multiple outlet flow paths with valves are implemented, then oil-air separation performance improves, but the device complexity increases
Solution Approach 1:
The ventilation system is segmented into multiple outlet flow paths, each with its own valve and separator. This allows oil-air separation to occur in dedicated regions, improving reliability by ensuring thorough separation while organizing complexity into manageable modular segments
Solution Approach 2:
Separators are introduced as intermediary components between the crankcase and the atmosphere in each outlet flow path. These separators act as mediators that facilitate oil-air separation, improving reliability by ensuring proper separation function while providing a structured approach to managing system 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
This configuration enhances the management of blowby gases, improving engine performance by maintaining a clean air supply and preventing oil contamination, thereby extending engine life and efficiency.
Implementation Method 1
a separator coupled to the cover member. The separator may define an inlet providing communication between the crankcase and the positive crankcase ventilation chamber
Implementation Method 2
A first valve may be located in the first outlet flow path in communication with a first region of the intake assembly
Data Source
AI summary
An engine assembly may include an engine structure, an intake assembly and a cylinder head cover assembly. The engine structure may define a combustion chamber and a crankcase in communication with a fresh air supply. The intake assembly may be in communication with the combustion chamber. The cylinder head cover assembly may be fixed to the engine structure and may include a cover member defining a positive crankcase ventilation chamber and a separator coupled to the cover member. The separator may define an inlet providing communication between the crankcase and the positive crankcase ventilation chamber. The cylinder head cover assembly may include a first outlet flow path in communication with the intake assembly and a second outlet flow path in communication with the intake assembly. A first valve may be located in the first outlet flow path.