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en.wikipedia.org/wiki/Four-stroke_engine

A four-stroke (also four-cycle) engine is an internal combustion (IC) engine in which the piston completes four separate strokes while turning the crankshaft. A stroke refers to the full travel of the piston along the cylinder, in either direction. The four separate strokes are termed: Intake: Also known as induction or suction.

www.briggsandstratton.com/na/en_us/support/videos/browse/4-cycle-theory.html

How a 4-Cycle Engine Works. The Briggs & Stratton 4-cycle engine powers an array of outdoor power equipment, including lawn mowers, generators, lawn tractors and tillers. ... This is called the compression stroke of the 4-cycle engine process. The air-fuel mixture is compressed between the piston and cylinder head.

mechstuff.com/how-does-a-4-stroke-engine-work

A stroke refers to the piston travelling full in either of the direction. A cycle gets completed when all the 4 strokes get completed. The four stroke engine was first demonstrated by Nikolaus Otto in 1876, hence it is also known as the Otto cycle. Let us come to the parts which a 4 stroke engine has,

motors-bay.com/tech-info/286-4-stroke-engine.html

The four-stroke engines have many advantages. But still, there are some disadvantages either in comparison with two-stroke engines. Nowadays almost every vehicle freighter or light motor cars are equipped with 4-stroke type of motor. Cycles as of 4-stroke engine, so of its analogue consist of 4 separate stages. The first one is injection.

www.mechanicalbooster.com/2014/02/how-does-a-four-stroke-diesel-engine-or...

The power generation process in four stroke diesel engine is also divided into four parts. Each part is known as piston stroke. In IC engine, stroke is referred to the maximum distance travel by the piston in a single direction. The piston is free to move only in upward and downward direction.

www.mechanicalbooster.com/2015/11/four-stroke-engine.html

The four stroke engine are of two types and these are. 1. Petrol engine/ gasoline engine: when petrol is used as a fuel in four stroke engine then it is called as four stroke petrol engine. The construction of petrol engine is slightly different from the diesel engine. In petrol engine there is a spark plug for the combustion of the fuel.

courses.washington.edu/engr100/Section_Wei/engine/UofWindsorManual/Four Stroke Cycle...

Four Stroke Cycle Engines. A four-stroke cycle engine is an internal combustion engine that utilizes four distinct piston strokes (intake, compression, power, and exhaust) to complete one operating cycle. The piston make two complete passes in the cylinder to complete one operating cycle. An operating cycle requires two revolutions (720°) of the crankshaft.

www.berrymanproducts.com/two-stroke-vs-four-stroke-engines

As far as efficiency goes, the 4-stroke certainly wins. This is due to the fact that fuel is consumed once every 4 strokes. Four-stroke engines are heavier; they weigh upwards of 50% more than a comparable 2stroke engine. Typically, a 2-stroke engine creates more torque at a higher RPM, while a 4-stroke engine creates a higher torque at a lower ...

www.brighthubengineering.com/machine-design/1501-how-a-four-stroke-spark...

In a four-stroke spark ignition (SI) engine the cycle of operations of the engine are completed in strokes of the piston inside the cylinder. The four strokes of the piston are: suction, compression, expansion or power, and exhaust.

www.animatedengines.com/otto.html

Four Stroke Engine. 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. It powers almost all cars and trucks.