Otto & Diesel-Cycle Analysis, Performance and Comparison

What is the primary difference between the Otto Cycle and Diesel Cycle?

• Compression ratio

• Fuel type

• Number of strokes

• Ignition method

Explain the key components of the Otto Cycle Analysis.

• Adiabatic compression, constant pressure heat addition, adiabatic expansion, constant pressure heat rejection

• Isentropic compression, constant volume heat addition, isentropic expansion, constant pressure heat rejection

• Isentropic compression, constant volume heat addition, isentropic expansion, constant volume heat rejection

• Isentropic compression, constant pressure heat addition, isentropic expansion, constant pressure heat rejection

How does the efficiency of the Diesel Cycle compare to the Otto Cycle?

• The efficiency of the Diesel Cycle is lower than the Otto Cycle.

• The efficiency of the Diesel Cycle is equal to the Otto Cycle.

• The efficiency of the Diesel Cycle is not relevant to the Otto Cycle.

• The efficiency of the Diesel Cycle is higher than the Otto Cycle.

Calculate the efficiency of an engine using the Otto Cycle.

• Efficiency = 1 - (1 / compression ratio ^ (gamma + 1))

• Efficiency = 1 - (1 / compression ratio ^ (gamma - 2))

• Efficiency = 1 - (1 / compression ratio ^ (gamma - 1))

• Efficiency = 1 - (1 / compression ratio ^ (gamma))

Discuss the performance comparison between the Otto and Diesel Cycles.

• The Otto cycle is more efficient at low speeds and loads, while the Diesel cycle is more efficient at high speeds and loads.

• Both the Otto and Diesel cycles involve constant volume heat addition.

• The main difference between the Otto and Diesel cycles is the type of fuel they use.

• The Otto cycle is ideal for gasoline engines, while the Diesel cycle is ideal for diesel engines. The main difference lies in the combustion process: Otto cycle involves constant volume heat addition, while Diesel cycle involves constant pressure heat addition. The Otto cycle is more efficient at high speeds and loads, while the Diesel cycle is more efficient at low speeds and loads.