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INTERNAL COMBUSTION ENGINES PPT
The document provides an overview of internal combustion engines, including types such as two-stroke and four-stroke engines, along with their advantages and disadvantages. It discusses the working principles of various engine types, including diesel and Wankel rotary engines, and touches on their applications in transportation and power generation. Key concepts include Carnot's theorem, fuel mixture combustion, and differences in efficiency and construction complexity among the engine types.
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Overview of internal combustion engines and team names from Bhausaheb Vartak Polytechnic.
Introduction to various types of heat engines including internal and external combustion engines.
Defines internal combustion engines and their applications in various fields like automotive and aviation.
Explains Carnot's theorem regarding efficiency limits of engines between heat reservoirs.
Mechanism and operation of two-stroke engines, along with their advantages and drawbacks.
Details the operational stages of four-stroke engines, including advantages and disadvantages.
Advantages and disadvantages of diesel engines compared to other types of engines.
Various cylinder layouts for multi-cylinder engines including examples and their configurations.
Discusses engine characteristics, cooling mechanisms, and turbocharged engines.
Final slide expressing gratitude for attention.
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INTERNAL COMBUSTION ENGINES PPT
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- 2. Bhausaheb Vartak Polytechnic •Internal Combustion Engines • PRESENTATION PREPARED BY • JUDE RODRIGUES - 2128 • AKASH PANCHAL - 2124 • TUSHAR SHETTY - 2133 • RIDDHISH PARAB - 2125 • TYPT
- 3. types of heatengines external combustion internal combustion steam engines turbines Stirling engine Otto engine Diesel engine Vankel engine Internal Combustion Engines
- 4. Internal Combustion Engines Theinternal combustion engine is an engine in which the combustion of fuel-oxidizer mixture occurs in a confined space applied in: automotive rail transportation power generation ships aviation garden appliances
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- 7. Internal Combustion Engines –Theorem Carnot cycle - Carnot's theorem is a formal statement of this fact: No engine operating between two heat reservoirs can be more efficient than a Carnot engine operating between those same reservoirs.
- 8. Internal Combustion Engines –Carnot cycle - TH is the absolute of cold reservoir TC is the absolute of hot reservoir
- 9. Internal Combustion Engines –two stroke - 1. Power / Exhaust a. ignition b. piston moves downward compressing fuel-air mixture in the crankcase c. exhaust port opens 2. Intake / Compression a. inlet port opens b. compressed fuel-air mixture rushes into the cylinder c. piston upward movement provides further compression
- 10. Internal Combustion Engines –two stroke - Advantages: lack of valves, which simplifies construction and lowers weight fire once every revolution, which gives a significant power boost can work in any orientation good power to weight ratio Drawbacks: lack of a dedicated lubrication system makes the engine to wear faster. necessity of oil addition into the fuel low efficiency produce a lot of pollution
- 11. Internal Combustion Engines –four stroke - starting position a. piston starts moving down b. intake valve opens c. air-fuel mixture gets in 1. intake a. piston moves up b. both valves closed c. air-fuel mixture gets compressed 2. compression
- 12. Internal Combustion Engines –four stroke - ignition a. air-fuel mixture explodes driving the piston down 3. power a. piston moves up b. exhaust valve opens c. exhaust leaves the cylinder 4. exhaust
- 13. Internal Combustion Engines –four stroke - Advantages: •dedicated lubrication system makes to engine more wear resistant •better efficiency that 2-stroke engine •no oil in the fuel – less pollution Drawbacks: •complicated constriction •should work in horizontal position due to lubrication
- 14. Internal Combustion Engines –four stroke - air intake compression fuel injection combustion exhaust exhaust /intake
- 15. Internal Combustion Engines –Diesel - Advantages: •self ignition (without electrical spark plug) •better efficiency •reliability •higher durability •supplied with worse fuels Drawbacks: •more expensive production •more weight •louder •lower revolutions
- 16. Internal Combustion Engines –Diesel -
- 17. Internal Combustion Engines –multi-cylinder - Cylinder layouts
- 18. Internal Combustion Engines –multi-cylinder - Cylinder layouts flat inline V TYPE
- 19. Internal Combustion Engines –multi-cylinder - inline flat „boxer” V
- 20. Internal Combustion Engines –multi-cylinder - 14 cylinder Diesel engine (80 MW)
- 21. Internal Combustion Engines –multi-cylinder - Cylinder layouts radial
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- 26. Internal Combustion Engines Wankelrotary engine Advantages: •higher power output •no reciprocating mass •simpler and lighter construction Drawbacks: •increased wear of rubbing parts •higher fuel consumption •requirement for better materials
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