Why is dual cycle better than Diesel cycle?

The dual cycle is a better approximation to the modern high speed compression ignition engine than either the Diesel cycle or the Otto cycle. With further increase in compression ratio, the power output decreases with increasing pressure ratio and decreasing cut-off ratio.

Is dual cycle more efficient than Diesel cycle?

In dual cycle, injection of fuel starts little before piston reaches TDC. So cut-off ratio of dual cycle is less than that of diesel cycle so its efficiency will be higher than diesel cycle for same compression ratio.

What is the difference between Otto Diesel and dual cycle?

The main difference between otto, diesel and dual cycle depends on the thermodynamic process concerned is how you add heat. In Otto cycle heat addition is Isochoric, i.e Heat is added to the engine when the piston is at the top dead center. Dual cycle is a conatant pressure and constant volume heat addition cycle.

How does the dual combustion cycle differ from the Diesel cycle?

Otto cycle is used by petrol ignition whereas diesel engine uses the diesel cycle. The main difference that separates these two cycles is the way they supply heat to the engine to begin the ignition.

Which cycle is more efficient?

Explanation: Otto cycle is more efficient than Diesel cycle for a given compression ratio. 6. For constant maximum pressure and heat input, the air standard efficiency of the gas power cycle is in the order.

What is the purpose of the ideal dual cycle?

An ideal cycle that better approximates the actual performance of a compression-ignition engine is the dual cycle, in which the combustion process is modeled by two heat-addition processes: a constant-volume process and a constant-pressure process, as shown in Fig. 8.11.

Why is the Diesel engine more efficient than the Otto engine?

3. 6 Diesel 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.

Which has higher efficiency Otto or Diesel or dual?

Explanation: Otto cycle is more efficient than Diesel cycle for a given compression ratio. For constant maximum pressure and heat input, the air standard efficiency of the gas power cycle is in the order.

Why efficiency of Otto cycle is greater than diesel cycle?

Complete combustion means improved efficiency. In addition Diesel engine has lots of subsidiary parts which increases the weight and hence reduces the efficiency. It means that otto cycle gives more work than diesel cycle for same compression ratio. so, otto cycle has higher efficiency than diesel cycle.

Which processes are same in Otto Diesel and dual combustion cycle?

Diesel cycle has the least efficiency. The dual cycle has the efficiency between the Otto and diesel cycle. Same as the same compression ratio and hear addition.

Why petrol engines and diesel engines are called as SI and CI engines respectively?

in S.I engines,ignition process is carried out with the help of a spark plug which ignites a mixture of air and fuel that is compressed in the combustion chamber. Whereas,a diesel engine also known as Compression Ignition (C.I) engine works on the basis of Diesel cycle or Constant pressure heat addition 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.