In my previous articles, I gave an introduction to Otto cycle and derived the air-standard efficiency of Otto cycle. In this article, I will derive the mean effective pressure (m.e.p) of Otto cycle. What is Mean Effective Pressure? Mean effective pressure is the ratio of work done (W) during the working stroke(s) of a cycle [...]

## Derivation of air-standard efficiency of Otto Cycle

In my previous article, I gave a short introduction to Otto cycle and discussed the processes in it. In this article, I will derive the air-standard efficiency of Otto cycle. p-V and T-s Diagrams of Otto Cycle: p-V Diagram T-s Diagram Basic terms used in derivation of air-standard efficiency of Otto cycle: Total Cylinder Volume: [...]

## Otto Cycle – Processes with p-V and T-s Diagrams

Otto cycle is a gas power cycle that is used in spark-ignition internal combustion engines (modern petrol engines). This cycle was introduced by Dr. Nikolaus August Otto, a German Engineer. An Otto cycle consists of four processes: Two isentropic (reversible adiabatic) processes Two isochoric (constant volume) processes These processes can be easily understood if we [...]