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Otto Cycle to Diesel Cycle

Otto Cycle to Diesel Cycle. P M V Subbarao Professor Mechanical Engineering Department. Creation of Religious Engines…. Clue to Achieve Higher Efficiency. Hardware Feasibility of Otto Cycle. Net cycle work:. Piston Displacement volume. Work done per unit piston displacement volume:.

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Otto Cycle to Diesel Cycle

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  1. Otto Cycle to Diesel Cycle P M V Subbarao Professor Mechanical Engineering Department Creation of Religious Engines…

  2. Clue to Achieve Higher Efficiency

  3. Hardware Feasibility of Otto Cycle Net cycle work: Piston Displacement volume Work done per unit piston displacement volume:

  4. Measure of Size & Feasibility AIR P 3 Qin 4 Wcycle 2 1 V2 V1

  5. Factors Affecting Work per Cycle The net cycle work of an engine can be increased by either: i) Increasing the r (12’) ii) Increase Qin (23”) 3’’ P (ii) 3 4’’ 3’C Qin 4 Wcycle 4’C 2 (i) 1 2’ V2 V1

  6. Creation of Compact Engines Using Otto Cycle (200 CC) Qin = 500J/cycle) MEP, MPa Qin = 200J/cycle) Qin = 100J/cycle) rv

  7. The Historical Event in Automobiles • In 1893, the Benz Velo became the world's first inexpensive, mass-produced car. • 12000 unites were produced. • 0.7 hp and 958cc!!! • The Mercedes 35 HP (German: Mercedes 35 PS) was a radical early car model designed in 1901. • Engine volume: 5,918CC. • The racecar was of a disappointing performance by multiple technical complications and enduring just for few laps.

  8. SI Engine for Propulsion

  9. Thermo-chemical Feasibility Fuel/Air Mixture Compression Stroke

  10. Engine Damage From Severe Knock Damage to the engine is caused by a combination of high temperature and high pressure. Piston crown Piston Aluminum cylinder head Cylinder head gasket

  11. Critical Compression Ratio Formula Name Critical r CH4 Methane 12.6 C3H8 Propane 12.2 C8H18 Isooctane 7.3

  12. History of Wildfires

  13. Generalized Flammability Map

  14. Flash Point Design Constraints: Flammability Characteristics Rich Mixture Stoichiometric Line Flammable Vapour Flammable mist Spontaneous Ignition Inflammable mist Lean Mixture Line Burning Impossible Mixture Temperature

  15. Inflammability of Fuels

  16. Spontaneous (Auto) Ignition Temperature of Fules

  17. Rudolf Christian Karl Diesel • Diesel published a treatise entitled, Theory and Construction of a Rational Heat-engine to Replace the Steam Engine and Combustion Engines Known Today. • This formed the basis for his work on and invention of, the diesel engine. • In his engine, fuel was injected at the end of compression and the fuel was ignited by the high temperature resulting from compression.

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