What are the major differences between Otto and Diesel?

The Otto cycle has less compression ratio (7:1 to 10:1) but in diesel cycle the compression ratio is high (11:1 to 22:1). In Otto cycle as well as in diesel cycle heat rejection takes place at constant volume. The efficiency of Otto cycle is less as compared with the Diesel cycle.

How does the Diesel cycle differ from the ideal Otto cycle?

The most significant difference between the ideal Otto cycle and the ideal Diesel cycle is the method of igniting the fuel-air mixture. The continuation of the cycle including the expansion and exhaust processes are essentially identical to that of the ideal Diesel cycle.

Do Diesel engines use the Otto cycle?

The Diesel cycle is a combustion process of a reciprocating internal combustion engine. This is in contrast to igniting the fuel-air mixture with a spark plug as in the Otto cycle (four-stroke/petrol) engine.

What is Carnot cycle Otto and Diesel cycle?

Otto and Diesel These cycles are not as efficient as carnot cycle as process are not reversible. Carnot cycle is an ideal cycle proposed by said carnot, ideal cycle. An Otto cycle is an idealized thermodynamic cycle that describes the functioning of a typical spark ignition piston engine.

Is the Otto cycle reversible?

The Otto cycle is another example of a reversible cycle that only exists in theory. We study the Otto cycle to understand what takes place inside the internal combustion engine. The Otto cycle consists of four reversible processes, two being adiabatic processes and two being isovolumetric processes.

Why is diesel cycle more efficient than Otto cycle?

The simple answer is ,In the otto the energy available is fully used to raise the pressure in the cylinder. Higher the pressure implies larger work done. But in diesel cycle, Part of the energy is added only during the expansion, So it does not contribute to the work. Hence Otto cycle is more efficient.

What is the difference between diesel cycle and dual combustion cycle?

The diesel cycle is a constant pressure heat addition cycle. In Dual Cycle heat addition is at isochoric and at isobaric i.e Heat addition to the engine is at constant pressure and at constant volume. Dual cycle is a conatant pressure and constant volume heat addition cycle.

Why is Otto more efficient than diesel cycle?

Which engine works on Otto cycle?

internal combustion engines
The Otto Cycle, describes how heat engines turn gasoline into motion. Like other thermodynamic cycles, this cycle turns chemical energy into thermal energy and then into motion. The Otto cycle describes how internal combustion engines (that use gasoline) work, like automobiles and lawn mowers.

What fuels do Otto engines use?

The Otto Cycle engine was eventually adopted to run on Ligroin and eventually gasoline, and many gases. During WWII Otto engines were run on more than 62 different fuels, such as wood gas, coal gas, propane, hydrogen, benzene, and many more. The engine is limited to light fuels.

Which fuel is used in Otto cycle?

gasoline
The Otto cycle engine uses a spark to ignite a mixture of air and – traditionally – gasoline2 compressed by the piston within the engine cylinder. This spark ignition causes an explosive release of heat energy which increases the gas pressure in the cylinder, forcing the piston outwards as the gas tries to expand.

How is the Otto cycle different from the Diesel cycle?

1. Otto cycle has low thermal efficiency. The diesel cycle has high thermal efficiency. 2. It has a low compression ratio. But This one works on a high compression ratio. 3. Otto cycle is also called a Constant volume cycle. The diesel cycle is called a constant pressure cycle.

Who was the inventor of the Otto cycle?

The idea of Otto cycle was first unveiled by Nicolas Otto back then in 1876. The diesel cycle was proposed by Dr. Rudolph Diesel in 1897. Uses the spark plugs to light the charge, which is a mixture of air and fuel.

When does adiabatic expansion occur in a Diesel cycle?

In the diesel cycle, the adiabatic expansion takes place when the heat addition is cut-off. It has a comparatively higher compression ratio. It ranges from 11:1 to 22:1 After drawing air during the intake stroke, fuel is injected by an injector.

How does the Diesel cycle work in a car?

Diesel engines work on the principle of diesel cycle whereby fuel injectors are required to supply fuel into the combustion chamber. The diesel cycle works on four different processes which are adiabatic compression, heat addition, adiabatic expansion and then heat rejection.