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In this section it is shown an ideal Otto cycle in which there are a lot of assumptions differs from actual Otto cycle.
The term arose from the original engine's inventor, Nikolaus Otto. 3. It is a gas power cycle that is used in spark ignition engine (i.e. The entire modern petrol engine works on Otto cycle. Otto's patent was overturned in 1886 in favor of the patent granted to Alphonse Beau de Roaches for his four-stroke engine. 5 The Internal combustion engine (Otto Cycle) [VW, S & B: 9.13] The Otto cycle is a set of processes used by spark ignition internal combustion engines (2-stroke or 4-stroke cycles). But here it is difficult comparatively Otto cycle. It consist of four processes, Two isentropic (reversible adiabatic) processes and two isochoric (constant volume) processes. One of the most important landmarks in engine design comes from Nicolaus Otto who in 1876 invented an effective gas motor engine—the first practical alternative to the steam engine. Let the engine cylinder contains m kg of air at point 1. Another noteworthy difference is that the Otto cycle heat occurs at constant volume, whereas the diesel cycle works on constant pressure. petrol engine) for its working. He created an engine that would evolve into the four-stroke engine mass produced for most vehicles. The four stroke engine was first demonstrated by Nikolaus Otto in 1876 1, hence it is also known as the Otto cycle.The technically correct term is actually four stroke cycle.The four stroke engine is probably the most common engine type nowadays. In 1876 Otto built an internal-combustion engine utilizing the four-stroke cycle (four strokes of the piston for each ignition). An Otto cycle is an idealized thermodynamic cycle that describes the functioning of a typical spark ignition piston engine.It is the thermodynamic cycle most commonly found in automobile engines. The main difference that separates these two cycles is the way they supply heat to the engine to begin the ignition.

In reality, the ideal cycle does not occur and there are many losses associated with each process. On this page we discuss the Otto Thermodynamic Cycle which is used in all internal combustion engines. The Otto cycle was given by Dr. Nikolaus August Otto. 1. The Air Standard Otto cycle is the ideal cycle for Spark-Ignition (SI) internal combustion engines, first proposed by Nikolaus Otto over 130 years ago, and which is currently used most motor vehicles. The entire modern petrol engine works on Otto cycle. Otto cycle is used by petrol ignition whereas diesel engine uses the diesel cycle.

Chapter 3: The First Law of Thermodynamics for Closed Systems d) The Air-Standard Otto Cycle (Spark-Ignition) Engine. 5 The Internal combustion engine (Otto Cycle) [VW, S & B: 9.13] The Otto cycle is a set of processes used by spark ignition internal combustion engines (2-stroke or 4-stroke cycles). Otto Cycle – Otto Engine.