Could you know that difference between 2 stroke and 4 stroke engines?

Answer 1

These guys all have good answers but a couple of corrections need to be made. A two stroke completes a cycle in one revolution, not two and a four stroke completes it's cycle in two revolutions of the crankshaft not four.
As far as diesel engines all being two stroke the Detroit 53, 71, 92 and 110 series engines and some small stationary engines are two stroke but most diesel engines are four cycle.

Answer 2

2 stroke - 2 strokes per cycle - the spark plug sparks every revolution - so the cycle consists of a fuel intake stoke (piston going down and a compression stroke (piston going up) the compression and exhaust stokes happen with in these strokes - so basically the engine takes in fuel and releases exhaust on the down stroke, and compresses and combusts on the upstroke making it a 2 stroke cycle. The advantages of these engines are first and foremost - their useability in different area's - since their is no oil well (the engine actually burns oil with gas to keep the pistons lubed) you can flip these engines any which way and they will still work, they are more powerful - since you get the cycle only takes 2 strokes, they have better power to weight ratio's, they are more inexpensive, they are simpler. Disadvantages - they are less fuel efficient (you will lose unburned fuel through the exhaust / intake stroke since you are taking in new gas and releasing old fuel at the same time, they are louder, you need to add oil, etc.

4 Stroke - there are 4 strokes to the cycle - where the plug fires once every 4th stroke. the cycle goes - intake stroke (piston goes down) compression stroke (piston goes up) combustion stroke (piston goes back down with the plug firing) and exhaust stroke (piston goes back up) - the advantages here are that it is much more fuel efficient - since exhaust and intake have their own steps in the cycle. Compression has it's own stroke, and the more compressed the fuel is the more power you will get from it - so it takes less fuel at that compression to give you the power, no burning oil (like your car their is an oil well which strictly lubricates the pistons and crank (does not burn it) quieter, but at the same time they are heavier, slower and less powerful. For a boat I would only buy 4 strokes now, or if you want that extra kick - go with a HPDI - a high pressure direct injection 2 stroke (which gives you the quiet ness and reliability of the 4 with the power of the 2 and it burns almost no oil - but in any case all new outboards are very expensive.... and just for ease of use - 4 stroke is the way to go

Answer 3

A 2-stroke engine is different from a 4-stroke engine in two basic ways. First, the combustion cycle is completed within a single piston stroke as oppose to two piston strokes, and second, the lubricating oil for the engine is mixed in with the petrol or fuel. The 4 stroke will be generally less polluting, last longer, but may have less power than 2-stroke.

Check the link below for more detailed information with graphics and animation to explain better.

Answer 4

the 2 stroke engine is one complete cycle of the cylinder, one stroke up, to compress the fuel,air mixture and fires and exhaust all gases and then one stroke down to pull in the fuel air mixture and then the cycle starts again, as for a 4 stroke it is kinda similar but the strokes take twice as long. up stroke the fuel air mixture is compressed and the cylinder fires down stroke, then the next up stroke pushes out all burnt gasses to exhaust then the down stroke pulls fresh fuel air mixture into the cylinder, the cycle is complete, it starts all over again, yes all form of 2 stroke has some sort of lubricant in the fuel, diesel engines are 2 stroke engines, that why diesel is is a little oily to the touch. i hope this helps

Answer 5

A two stroke engine requires oil to be mixed with the fuel, whereas a four stroke engine has the engine oil within the case.

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Answer 6

the only thing they have in common is that they all work on the suck squeeze bank and blow method just the 2 stroke does it in 2 revolutions and the four stroke does it in 4

Answer 7

Yes

Answer 8

Well I do.Do you need any help