A new list of the most common words and phrases in the English language in 2013 was overwhelmingly negative. 404 â as in the error message that appears when a web page can't load â and toxic politics both earned top spots, with surveillance, drones and federal shutdown also appearing on the list, from Global Language Monitor.
3. 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).
The very first internal combustion engines did not compress the mixture. The first part of the piston downstroke drew in a fuel-air mixture, then the inlet valve closed and, in the remainder of the down-stroke, the fuel-air mixture fired.The exhaust valve opened for the piston upstroke.tto cycle: Otto cycle is the typical cycle for most of the cars internal combustion engines, that work using gasoline as a fuel. Otto cycle is exactly the same one that was described for the four-stroke engine. It consists of the same four major steps: Intake, compression, ignition and exhaust.