How does a Otto engine work?

The Otto engine operates with a mixture compressed in a cylinder by a piston. Shortly before the piston reaches the top the mixture is ignited with a spark, and the flame propagates at a normal velocity into the unburned mixture, increasing the pressure and moving the…

What 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.

Why is Miller cycle more efficient?

The Miller cycle has one additional benefit: When the intake air is compressed by a supercharger then cooled by an intercooler, it has a higher density and a lower temperature than that obtained by a piston compression alone, further increasing the engine’s efficiency.

What are four processes make up the ideal Otto cycle?

The ideal Otto cycle consists of four internal reversible processes: 2 Isentropic compression 3 Constant volume heat addition 4 Isentropic expansion 1 Constant volume heat rejection

What are the four parts of Otto cycle?

Four Stroke Otto cycle Engine Suction stroke. During suction stroke, the piston is moved downward by the crankshaft, which is revolved either by the momentum of the flywheel or by the power generated by the Compression stroke. During the compression stroke, the piston moves upward, thus compressing the charge. Working power of expansion stroke. Exhaust stroke.

What is the difference between Otto cycle and Diesel cycle?

In Otto cycle at the time of heat addition, the piston is at TDC where as in diesel cycle when the piston is in backward stroke, the heat addition begins and last at a portion of piston stroke. 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).

What are the advantages of the Otto cycle?

In the Otto cycle, heat addition takes place at constant volume At the time of heat addition, the piston is at the Top Dead Centre (TDC). The Otto cycle has compression ratio from 7:1 to 10:1 which is lesser than that of a diesel cycle. It has comparatively has higher thermal efficiency. It uses spark plugs to ignite the charge (fuel+air).