# What is the dual combustion cycle?

## What is the dual combustion cycle?

Dual Combustion Cycle is a combination of Otto Cycle and Diesel Cycle. Semi diesel engine works on this cycle, so it is also known as Semi-Diesel Cycle. This cycle is mainly used in high speed diesel engines. In this cycle heat addition is done at constant pressure and constant volume.

## What are the process involved in dual combustion cycle?

Dual Combustion Cycle is a combination of Otto cycle and Diesel cycle. It is sometimes called semi-diesel cycle, because semi-diesel engines work on this cycle. The ideal dual combustion cycle consists of two reversible adiabatic or isentropic, two constant volume and a constant pressure processes.

What is dual combustion cycle name the process of dual combustion cycle?

The dual combustion cycle is the combustion of Otto and diesel cycles. It is also called the semi-diesel cycle because semi-diesel engines work on this cycle. In this cycle, heat is absorbed partially at constant pressure. It has two adiabatic, two constant volume, and constant pressure processes.

What is the formula of Otto cycle?

Efficiency of Otto and Diesel engines vs compression ratios. (3.17) η = 1 – r 1 – γ r c γ – 1 γ ( r c – 1 ) , where r c ≡ V 3 ′ / V 2 (Figure 3.8) is called the cutoff ratio and is the expansion ratio during the combustion period.

### Which statement is correct of dual cycle?

Explanation: None. Explanation: Another name for Dual cycle is a mixed cycle. Explanation: Since, Dual Cycle is a combination of Otto cycle and Diesel cycle, so in Dual cycle, generally heat addition takes place first at constant volume then at constant pressure.

### Where is dual combustion cycle used?

Dual combustion cycle is a combination of both Otto and Diesel cycles. This cycle finds application in working of Diesel engines. The air standard efficiency of this cycle is greater than Diesel cycle and less than Otto cycle. Dual combustion cycle finds application in Diesel engines.

What are the three factors that governs the efficiency of dual cycle?

For dual cycle, efficiency depends not only on compression ratio but also on how much heat is added at constant volume and constant pressure. For same amount of heat added, efficiency will increase if its share in constant volume heat addition is increased and vice versa.

What is the efficiency of dual cycle?

#### How many processes are there to execute a dual cycle?

Dual combustion cycle finds application in Diesel engines. This cycle consists of five processes (two isentropic, one constant pressure and two constant volume). Here heat is added at constant volume and later at constant pressure and the heat rejection is at constant volume.

#### Which fuel is used in dual cycle?

Diesel
As the name indicates, dual cycle is a combination of Otto and Diesel cycles. By using this cycle, one can arrive the comparison of Otto and Diesel cycle air standard efficiencies. This is a closed and used as a cycle for Diesel as a fuel. Dual combustion cycle is a combination of both Otto and Diesel cycles.

Who is the inventor of the dual combustion cycle?

∂ T {\\displaystyle \\partial T}. The dual combustion cycle (also known as the mixed cycle, Trinkler cycle, Seiliger cycle or Sabathe cycle) is a thermal cycle that is a combination of the Otto cycle and the Diesel cycle, first introduced by Russian-German engineer Gustav Trinkler, who never claimed to have developed the cycle though.

What are the processes in the dual cycle?

It consists of two adiabatic and two constant volume and one constant pressure processes. The dual cycle consists of following operations: Process 2-3: Addition of heat at constant volume. Process 3-4: Addition of heat at constant pressure. Process 4-5: Isentropic expansion. Process 5-1: Rejection of heat at constant volume.

## How big is the bore of an Otto dual cycle engine?

Otto, Diesel & Dual cycles all having same CR and heat input Problem 45.1: An engine working on dual cycle has bore of 20 cm & stroke of 40 cm. Compression ratio is 14.5 & pressure ratio at constant volume heat addition process is 1.5. The constant volume heat addition cut-off takes place at 4.9 % of the stroke.

## Why is the dual cycle used for hot spot ignition?

Because of lagging characteristics of fuel this cycle is invariably used for Diesel and hot spot ignition engines. It consists of two adiabatic and two constant volume and one constant pressure processes. The dual cycle consists of following operations: Process 2-3: Addition of heat at constant volume.