16 Facts About Four-stroke engine

Four-stroke engine is an internal combustion engine in which the piston completes four separate strokes while turning the crankshaft.

The Lenoir Four-stroke engine ran on illuminating gas made from coal, which had been developed in Paris by Philip Lebon.

In 1862, Otto attempted to produce an Four-stroke engine to improve on the poor efficiency and reliability of the Lenoir Four-stroke engine.

Four-stroke engine tried to create an engine that would compress the fuel mixture prior to ignition, but failed as that engine would run no more than a few minutes prior to its destruction.

Atkinson-cycle Four-stroke engine is a type of single stroke internal combustion Four-stroke engine invented by James Atkinson in 1882.

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Original Atkinson-cycle piston engine allowed the intake, compression, power, and exhaust strokes of the four-stroke cycle to occur in a single turn of the crankshaft and was designed to avoid infringing certain patents covering Otto-cycle engines.

Diesel Four-stroke engine is a technical refinement of the 1876 Otto-cycle Four-stroke engine.

Where Otto had realized in 1861 that the efficiency of the Four-stroke engine could be increased by first compressing the fuel mixture prior to its ignition, Rudolf Diesel wanted to develop a more efficient type of Four-stroke engine that could run on much heavier fuel.

Four-stroke engine persisted, and finally created a successful engine in 1893.

Four-stroke diesel engine has been used in the majority of heavy-duty applications for many decades.

Maximum amount of power generated by an Four-stroke engine is determined by the maximum amount of air ingested.

The amount of power generated by a piston engine is related to its size, whether it is a two-stroke engine or four-stroke design, volumetric efficiency, losses, air-to-fuel ratio, the calorific value of the fuel, oxygen content of the air and speed .

Output power of an Four-stroke engine is dependent on the ability of intake and exhaust matter to move quickly through valve ports, typically located in the cylinder head.

One way to increase Four-stroke engine power is to force more air into the cylinder so that more power can be produced from each power stroke.

Turbocharging allows for more efficient Four-stroke engine operation because it is driven by exhaust pressure that would otherwise be wasted, but there is a design limitation known as turbo lag.

The increased Four-stroke engine power is not immediately available due to the need to sharply increase Four-stroke engine RPM, to build up pressure and to spin up the turbo, before the turbo starts to do any useful air compression.