Industrial Consultancy & Sponsored Research (IC&SR) , IIT Madras
An Internal Combustion Engine Combustion Chamber with Baffles to Control In-Cylinder Flows
Categories for this Invention
Technology: Addition of Baffles to the combustion chamber of an IC engine. Category: Automobile & Transportation
Industry: Automotive
Application: IC Engine
Market: The global market size of (IC) engine was valued at USD 321.6 Billion in 2023 and is expected to reach USD 485.1 Billion by 2032 at a CAGR of 4.7%.
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Problem Statement
- Global efforts are being made to enhance the performance and emission characteristics of internal combustion engines, a crucial tool in the automotive industry.
- The combustion system, influenced by in-cylinder fluid dynamics, affects performance, emission control, and fuel economy.
- Techniques include directed and helical ports, valve shrouding, and piston profile modifications.
- However, these methods can increase manufacturing costs, reduce efficiency, and increase emissions.
- The goal is to improve performance and reduce engine knock without increasing costs.
Technology
An internal combustion engine consists of a cylinder and piston, with a combustion chamber shaped by baffles that divide incylinder flow into multiple zones, each with a separate vortex.
Baffles:
- Structure : Fin Type
- Types : Radial and circumferential.
- Function:Divide the entire in-cylinder flow into four regions, each with its own in-cylinder flow.
Combustion Chamber:
- During combustion, the baffles – fin-like structures steer the combustion waves in the longitudinal direction by dividing the global flow into zonal-wise flows.
- During the compression stroke, baffles partition a single tumble, confining the air-fuel combination in the combustion chamber regions.
- By rerouting radioactive combustion waves in a longitudinal direction, they improve the efficiency of internal combustion engines.
- Combustion chamber baffles stratify the dispersion of the air-fuel mixture and lessen wall wetness.
Key Features / Value Proposition
- Reduce engine knock in petrol, diesel, gasoline direct injection, homogeneous charge compression ignition, and all other types of internal combustion engines.
- Enhancement of in-cylinder flows in an internal combustion engine, improving air-fuel mixing and mixture distribution, and reducing spark ignition engine knocking.
- It does not affect combustion chamber space because of its compact size and shape.
- Increased air-fuel mixing and mixture distribution, lessen spark ignition engine knocking, and improved in-cylinder flows in internal combustion engines.
- Increases the efficiency of combustion, which boosts engine performance.
- The baffles also divide a single tumble during the compression stroke into many, limiting the air-fuel mixture distribution.
- At 1000 rev/min and 30 bar fuel injection pressure, EWB’s thermal efficiency and effective pressure improve by 9.1% and 3%, respectively, while CO and HC emissions decrease by 38.5% and 85%.
- It helps possibility of combustion even at lower engine speeds.
Questions about this Technology?
Contact For Licensing
sm-marketing@imail.iitm.ac.in
ipoffice2@iitm.ac.in
Research Lab
Prof. J. M. Mallikarjuna
Department of Mechanical Engineering.
Intellectual Property
- IITM IDF Ref. 2594
- Patent No: IN 533958
Technology Readiness Level
TRL-4
Experimentally validated in Lab