Today we will discuss about Otto cycle.
Otto Cycle:
The Otto cycle is a set of processes used by
spark ignition internal combustion engines (2-stroke or 4-stroke cycles).
Otto Cycle is named
after Nikolus Otto (Nikolaus Otto a German Scientist developed Otto Cycle (Idealized
Thermodynamic Cycle) for Internal Combustion Engine. Nikolus was born in 1832
and died 1891).
The Otto cycle is constructed from:
1) Top and bottom of the loop: a pair of
quasi-parallel and ISENTROPIC PROCESSES (Friction less, adiabatic
reversible).
2) Left and right sides of the loop: a pair of
parallel ISOCHORIC PROCESSES (constant volume).
The Cycle Process-
1-2: Compression Stroke. Adiabatic Compression of
air/Fuel Mixture in the cylinder. Isentropic Compression.
2-3: Ignition of the compressed air/fuel mixture at
the top of the compression stroke while the volume is essentially constant.
Constant Volume Heating.
3-4: Expansion (Power Stroke). Adiabatic Expansion
of the hot gases in the cylinder. Isentropic Expansion.
4-1: Exhaust stroke. Ejection of the spent, hot
gases. Constant volume cooling.
What is Isentropic Processes?
In thermodynamics, an isentropic process is an
idealized thermodynamic process that is both
adiabatic and reversible. The work transfers of the system are friction less,
and there is no transfer of heat or matter.
What is an Isochoric process?
An isochoric process, also called a constant-volume process, an iso volumetric process, or an isometric process, is a thermodynamic process during which
the volume of the closed system undergoing such a process remains constant.
Some Links related to Otto Cycle Mathematical Problems with answers-
