What is Otto cycle process?
The four-stroke Otto cycle is made up of the following four internally reversible processes: 1–2, isentropic compression; 2–3, constant-volume heat addition; 3–4, isentropic expansion; and 4–1, constant-volume heat rejection
What is the use of Otto cycle?
The Otto Cycle provides the energy for most transportation and was essential for the modern world Specifically, the vast majority of automobiles seen on the road today use the Otto Cycle to convert gasoline into motion
What is Otto cycle also known as?
constant pressure cycle
Is there a difference between an Otto cycle and a 4 cycle?
While the original Otto cycle engine used gasoline as a fuel source, diesel engines use the same 4-cycle operation through mixing a fuel/air mixture, fuel compression, downward combustion and exhaust The difference being a diesel fuel/air mixture is ignited by compression instead of a spark
What is the difference between Otto cycle and diesel cycle?
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
Is Otto cycle a petrol engine?
Otto cycle The Otto Cycle is named after Nikolaus Otto (1832–1891, German) who is credited as the first creator of a petroleum fuel based internal combustion engine operating under a four stroke cycle
What are the 4 stages of the Otto cycle?
The Otto cycle consists of isentropic compression, heat addition at constant volume, isentropic expansion, and rejection of heat at constant volume
Why is Otto cycle more efficient?
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 fuel is used in Otto cycle?
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 heat added into the Otto cycle?
Through the combustion of fuel, heat is added in a constant volume (isochoric process) process, followed by an adiabatic expansion process power (C) stroke The cycle is closed by the exhaust (D) stroke, characterized by isochoric cooling and isobaric compression processes
What is the compression ratio for diesel engine?
Diesel engines normally have compression ratios between 14:1 to 25:1 Higher compression ratios mean a higher thermal efficiency, which means that theoretically maximum efficiency can be achieved at an infinite compression ratio
What is the difference between petrol engine and diesel engine?
The primary difference (as most of you already know), is that petrol engines use spark plugs to ignite the air-fuel mixture, while diesel engines rely on heavily compressed air without any spark plugs Diesel engines are more efficient and use 15−20% less fuel translating into cheaper running costs
Do diesels use the Otto cycle?
Both these cycle are air standard cycles of automobile engines Otto cycle is used for petrol or spark ignition engine while diesel cycle is used for diesel or compression ignition engineDiesel cycle vs Otto Cycle: SNo Otto Cycle Diesel Cycle 1 Otto cycle is given by the Nicolas Otto in 1876 It was given by Dr Rudolph Diesel in 1897
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 Otto more efficient than diesel?
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 is more efficient diesel or Otto cycle?
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
What is the advantage of a Diesel cycle over the 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
Why is a 4 stroke called a 4 stroke?
As for 4-stroke engines, they run on gasoline without any oil mixed in and the piston goes up and down two times for every combustion cycle, hence it’s called a “4-stroke” However, 4-stroke engines require valves for both the intake and exhaust that must operate with high precision, making this engine format more
Which engine is more powerful petrol or diesel?
Apart from the fact that diesel engines are more powerful than petrol engines, they also have higher torque, and hence they give a smoother drive In petrol engines, the power developed is low due to the compression ratio, whereas in diesel engines, the power is more
What is the beginning of the Otto cycle?
Using the engine stage numbering system, we begin at the lower left with Stage 1 being the beginning of the intake stroke of the engine The pressure is near atmospheric pressure and the gas volume is at a minimum Between Stage 1 and Stage 2 the piston is pulled out of the cylinder with the intake valve open