Most truck and automotive diesel engines use a cycle reminiscent of a four-stroke cycle, but with a compression heating ignition system, rather than needing a separate ignition system. This variation is called the diesel cycle. In the diesel cycle, diesel fuel is injected directly into the cylinder so that combustion occurs at constant pressure, as the piston moves.
Otto 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.
PV diagram for Otto cycle On the PV-diagram, 1-2: Intake: suction stroke 2-3: Isentropic Compression stroke 3-4: Heat addition stroke 4-5: Exhaust stroke (Isentropic expansion) 5-2: Heat rejection The distance between points 1-2 is the stroke of the engine. By dividing V2/V1, we get: r
where r is called the compression ratio of the engine.
Other articles related to "diesel cycle, diesel, cycle, cycles":
... Many model airplanes use very simple "glow" and "Diesel" engines ... "Diesel" model airplane engines have variable compression ratios ... established the thermodynamic value of compression.) A historical implication of this is that the Diesel engine would eventually have been invented without the aid of electricity ...
... Diesel pusher A motorcoach with its engine in the rear, instead of the front ... For many years, all such coaches featured diesel engines ... a single year might be considered full-time, paying an increased premium.) Gasoline pusher See Diesel pusher Generator A gasoline, diesel or propane-powered device for generating 120 or 240 ...
... The diesel engine is a technical refinement of the 1876 Otto Cycle engine ... fuel mixture prior to its ignition, Rudolph Diesel wanted to develop a more efficient type of engine that could run on much heavier fuel ... With the same motivation as Otto, Diesel wanted to create an engine that would give small industrial concerns their own power source to enable them to compete against larger ...
... The Carnot cycle is reversible and thus represents the upper limit on efficiency of an engine cycle ... Practical engine cycles are irreversible and thus have inherently lower efficiency than the Carnot efficiency when operated between the same temperatures and ... The Carnot cycle achieves maximum efficiency because all the heat is added to the working fluid at the maximum temperature, and removed at the minimum ...
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