Diesel Exhaust Fluid Cooling for Crankcase Particulate Capture
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing closed crankcase ventilation systems struggle to effectively capture vapors and particulates in diesel engine exhaust gases, leading to buildup on turbocharger components and reduced engine performance.
Innovation Solution
A diesel exhaust fluid (DEF) cooling system is integrated to condense vapors in crankcase exhaust gases, facilitating easier removal of particulate matter by the ventilation system and preventing compressor degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a closed crankcase ventilation system is used to filter and recirculate exhaust gases, then emissions are reduced and engine performance is improved, but vapor and particulate capture remains insufficient leading to buildup on turbocharger components
Solution Approach 1:
The system changes the temperature parameter of the exhaust gases by introducing a cooling mechanism. The exhaust gases are cooled below their dew point, causing vapors to condense into liquid or semi-liquid form. This phase change transforms the harmful vapors into condensate that can be easily collected and removed, significantly improving particulate capture efficiency while maintaining emission reduction benefits
Solution Approach 2:
The invention utilizes the phase transition of exhaust vapors from gas to liquid/semi-liquid state through cooling. By reducing the temperature of exhaust gases below the dew point, water vapor and oil aerosols condense into condensate that can be effectively separated and removed by the ventilation system, resolving the insufficient capture problem
2Object-generated harmful factors
If filters are used to capture particulates in exhaust gases, then emissions are reduced, but uncaptured particles continue to accumulate on turbocharger surfaces degrading compressor efficiency
Solution Approach 1:
The system performs preliminary condensation of vapors before the exhaust gases reach the turbocharger compressor. By cooling the exhaust gases and condensing vapors into condensate upstream, the particulates are transformed into a form that can be easily captured and removed by the ventilation system, preventing their deposition on turbocharger surfaces and protecting compressor efficiency
Solution Approach 2:
The invention converts the harmful effect of hot exhaust vapors that cause particulate deposition into a beneficial process. By intentionally cooling the exhaust gases below dew point, the vapors condense into removable condensate, transforming the problem of vapor-related particulate buildup into an opportunity for effective particulate removal that protects turbocharger components
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 DEF cooling system efficiently condenses oil aerosol particulates, reducing emissions and preventing particulate buildup on engine components, thereby maintaining compressor efficiency and improving engine performance.
Implementation Method 1
cooling the crankcase exhaust gases, by the DEF cooling system, to condense vapors in the crankcase exhaust gases
Implementation Method 2
use the DEF to cool the crankcase exhaust gases passing therethrough
Data Source
AI summary
A vehicle includes a diesel engine having a crankcase and a crankcase ventilation system connected to the crankcase and configured to ventilate crankcase exhaust gases. The vehicle also includes a diesel exhaust fluid (DEF) reservoir including DEF therein, the DEF configured to reduce emissions of the diesel engine, and a DEF cooling system operably connected to the crankcase and the DEF reservoir. The DEF cooling system is configured to receive the DEF and use the DEF to cool the crankcase exhaust gases passing therethrough.