Table of Contents
What is the basic Diesel cycle?
Diesel Cycles have four stages: compression, combustion, expansion, and cooling.
What is Otto cycle and Diesel cycle?
Otto cycle is used for petrol or spark ignition engine while diesel cycle is used for diesel or compression ignition engine. The main difference between Otto cycle and Diesel cycle is that in Otto cycle heat addition takes place at constant volume and in diesel cycle heat addition takes places at constant pressure.
Which cycle is used in Diesel engine?
1 Otto Cycle. The Otto cycle is an air-standard cycle which approximates the processes in petrol or diesel engines. It is based on constant volume heat addition (combustion) and heat rejection processes, and isentropic compression and expansion. The diagram is shown in Fig.
What is cycle in engine?
Cycle, Engine a sequence of processes that regularly recur in an internal or external combustion engine and form the basis of the engine’s operation. An engine cycle may be plotted as a closed curve in coordinates of the volume and pressure (V, p) or the entropy and temperature (S, T) of the working fluid.
Why is it important for Diesel cycle?
The high-speed four-stroke-cycle diesel engine produces superior fuel economy, lower noise factors, and ease of meeting exhaust emissions regulations over its two-stroke-cycle counterpart.
What is the other name of Diesel cycle?
constant pressure cycle
Explanation: Diesel cycle is also known as constant pressure cycle as pressure is constant in this cycle.
Why is Diesel cycle better than Otto cycle?
Although for a given compression ratio the Otto cycle has higher efficiency, because the Diesel engine can be operated to higher compression ratio, the engine can actually have higher efficiency than an Otto cycle when both are operated at compression ratios that might be achieved in practice.
What is the other name for Diesel cycle?
Explanation: Diesel cycle is also known as constant pressure cycle as pressure is constant in this cycle.
Which cycle is more efficient Otto or Diesel?
Who uses Diesel fuel?
Diesel engines in trucks, trains, boats, and barges help transport nearly all products people consume. Diesel fuel is commonly used in public buses and school buses. Diesel fuel powers most of the farm and construction equipment in the United States.
What is an ideal diesel cycle?
The Diesel cycle is an ideal air standard cycle which consists of four processes: 1 to 2: Isentropic compression. 2 to 3: Reversible constant pressure heating. 3 to 4: Isentropic expansion.
Why does cut-off ratio in Diesel cycle?
ηDiesel is the maximum thermal efficiency of a Diesel cycle α is the cut-off ration V 3 /V 2 (i.e. the ratio of volumes at the end and start of the combustion phase) It is very useful conclusion, because it is desirable to achieve a high compression ratio to extract more mechanical energy from a given mass of the fuel.
What is the air fuel ratio in a Diesel cycle?
Typical operating ranges of diesel engines spread between an air/fuel ratio of 18 and up to 70, depending on the operation point. A/F ratio is the air to fuel ratio.
What is cut off ratio in Diesel cycle?
Cut off ratio in diesel engine is the ratio of volume after combustion to before combustion Or ratio of expansion volume to the clearance volume. So, thereotically in the aboveP-V diagram of diesel cycle ,cut off can be said as ratio of V3 to V2 (V = volume ). i.e, Cutoff ratio =V3/V2.