There is only one intake stroke in a four-stroke engine. The other three strokes are compression, power, and exhaust. The intake stroke is a down stroke of the piston in which fuel is drawn into the cylinder while the fuel intake valve is open. The next stroke is the compression stroke in which the valves are closed and the fuel is compressed for combustion. The following stroke is the power stroke - a downward stroke of the piston after fuel combustion that drives the crankshaft. The final stroke is the exhaust stroke, an upward stroke of the piston as the exhaust valve opens to relieve the exhaust fuel fumes.
A two stroke engine fires (an explosion in the motor) twice as often as a four stroke. A stroke is every time the piston in the engine changes direction. (From up to down) A two stroke engine fires every time the piston comes to the top where a four stroke will fire every other time. So if two single cylinder engines are running at 1,000 RPMs a two stroke will fire 1,000 times a four stroke will fire only 500 times. With twice as many explosions it will be hotter.
Each piston has one TDC position, when it is at its maximum height. During the four stroke cycle, each cylinder has two TDC events. Those are compression and exhaust.
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In a typical four-stroke engine, a piston moves up and down twice in one full cycle. Therefore, in an engine running at 3000 RPM, each piston would move up and down 3000 times per minute, or 50 times per second.
180 degrees per stroke.
90 degrees would be a half stroke.
A two stroke engine has half the strokes of an otto (or four stroke) engine, therefore it takes two crankshaft roatations to complete a cycle on a four stroke engine and only one revolution in a two stroke engine. There are several types of two stroke engines, the different types have to do with how the receive the air/fuel mixture, also you have two stroke diesel engines.
4 rings....
A stroke is half of a revolution.2 revs is 4 strokesone another is the samea 4 stroke engine goes through 2 revolutions to complete one cyclea cycle is an X number of strokes to complete combustion and power process in an internal combustion engine'The intake stroke is the first downward movement of the piston, half of a revolution. The next half of a rev is the compression stroke, then power stroke, and exhaust stroke.
A stroke is half of a revolution.2 revs is 4 strokesone another is the samea 4 stroke engine goes through 2 revolutions to complete one cyclea cycle is an X number of strokes to complete combustion and power process in an internal combustion engine'The intake stroke is the first downward movement of the piston, half of a revolution. The next half of a rev is the compression stroke, then power stroke, and exhaust stroke.
The spark plug will fire once every four strokes, at the end of the compression stroke.