Ejector Separation Device for Engine Blow-by Gas
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Solution Overview
Problem
Existing separating devices for impurities from oil mist-containing blow-by gas streams in combustion engines lack simplicity, reliability, and efficiency in separating impurities, particularly in creating sufficient pressure for effective separation.
Innovation Solution
A separating device comprising an ejector device, a supply device for drive media such as compressed supply air and exhaust gas, and a control device to manage the drive medium's composition and flow rate, utilizing a jet pump to enhance separation efficiency by adjusting pressure and flow rates based on engine operating states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional separating devices are used, then separation function is provided, but device complexity increases and reliability decreases
Solution Approach 1:
The separating device is divided into functionally independent modules: a separating body for impurity separation, an ejector device for pressure generation, and a supply device for drive medium delivery. This segmentation allows each component to be optimized independently, improving reliability while maintaining manageable complexity through modular design.
Solution Approach 2:
The ejector device utilizes the engine's own compressed supply air and exhaust gas as drive media, eliminating the need for external power sources or additional compression systems. This self-service approach reduces device complexity and potential failure points while maintaining separation reliability.
2Productivity
If pressure is increased for effective separation, then separation efficiency improves, but energy consumption increases
Solution Approach 1:
The system converts waste exhaust gas, which would otherwise be discharged uselessly, into a useful drive medium for the ejector device. This exhaust gas recovery approach provides the necessary pressure for effective separation while converting a harmful waste product into a beneficial resource, improving separation efficiency without proportionally increasing energy consumption.
Solution Approach 2:
The supply device recovers and reuses compressed supply air and exhaust gas that would otherwise be wasted in the engine system. By capturing these gases and redirecting them to drive the ejector, the system maintains high separation efficiency while minimizing additional energy consumption, as the drive media are already compressed and pressurized from engine operations.
3Adaptability or versatility
If fixed drive medium composition is used, then system simplicity is maintained, but adaptability to different operating states decreases
Solution Approach 1:
The supply device dynamically adjusts the composition and flow rate of the drive medium based on real-time engine operating conditions. The system can selectively use compressed supply air, exhaust gas, or mixtures of both, with flow rates that automatically adapt to varying engine loads and speeds. This dynamic adaptability ensures optimal separation performance across all operating states without requiring complex manual intervention.
Solution Approach 2:
The control system continuously monitors engine operating parameters and uses this feedback to automatically adjust the drive medium composition and flow rate. This closed-loop control enables the separating device to adapt to changing engine conditions, maintaining high separation efficiency while managing control complexity through automated feedback-based adjustment rather than manual intervention.
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
The solution enables reliable and efficient separation of impurities by optimizing pressure and flow rates, improving the separation efficiency and operational flexibility of the device.
Implementation Method 1
an ejector device for producing a suction effect on an exit side of the at least one separating body
Data Source
AI summary
In order to provide a separating device which has a simple design and is operable reliably and efficiently, it is proposed that the separating device comprises the following: at least one separating body for separating the impurities; an ejector device for producing a suction effect on an exit side of the at least one separating body; a supply device for supplying a drive medium to the ejector device, wherein, by means of the supply device, selectively a) compressed supply air from a supply air tract of the combustion engine, b) exhaust gas from an exhaust gas tract of the combustion engine and/or c) a mixture of compressed supply air and exhaust gas is suppliable as drive medium to the ejector device.