Four stroke and two stroke engines

[pandaeyes23]

What are the major difference between a two stroke and four stroke engine cycle?

[scotman]

Amazing invention Google

http://www.deepscienc...articles/engines.html

[MarkRae]

Blimey, how on earth did you find that? You mean that there's a website called Google where you can look things up? I've never heard of it before. I'm guessing it must be really difficult to use....

[ummmm]

Any need for that Mark?

[dotty.]

you tell 'im ummmm

[douglas9401]

Yeah, it almost renders Answerbank and it's wittier regulars redundant. Oh, and you.

[ummmm]

It just annoys me. It's a question and answer site.

Ed has said plenty of times...if you don't know the answer don't comment. Sarcastic answers like Marks is hardly going to encourage people to come back...!!!

[DTCwordfan]

Give Mark some headway, he probably had six pints of oj for Xmas Eve lunch and is sporting a major citric hangover, given his level of acidity this afternoon

[dotty.]

plus, it would be good if someone who knew the answer, were to actually answer it, we can all google but me with my low attention span would only need to read the pertinent points

[MarkRae]

> Give Mark some headway

Quite, and I didn't even point out the grammatical error in douglas' purple prose either...

[scotman]

Calm down people.

I guesstimate that, of the regulars, 5-6 could probably give a reasonable answer to that question(myself included).

I doubt it could be done in less that 2 replies-worth of space and I am not inclined to do that much typing for one question. Much easier to point to a web site.

I have just looked and this is OP's first time on AB, perhaps we can all try not to scare her away.

Merry Christmas to all

[wildwood]

HI pandaeyes. Welcome to Answerbank. Sorry you had to strike the resident grouch on your first visit. Hope you have a great Xmas.

[Clanad]

Mean while... back to the original question... Simply put, all engines; internal combustion, or even turbojet engines on aircraft, work with the same basic principal... suck and squeeze, blow and go... meaning fuel is "sucked" into the combustion chamber, squeezed (or compressed), ignited for power and the remnants (gases) are dumped overboard befoe starting all over again.

4 cycle (also called 4 stroke) simply means that all I'v just described takes four strokes of each piston to accomplish. The major difference is that the intake and exhaust strokes require complicated timing of valves opening and closing. Additionally, all the moving parts are lubricated by an engine driven oil pump and the oil is routed to various areas within the engine. Whereas a 2 cycle (2 stroke) engine accomplishes the same thing in only (wait for it) 2 strokes. There are no valves and the engine is lubricated by the oil that's suspended in the gas...
Simple as that. The two stroke engines are required to rev at higher RPM's to achieve power and so, relative to the 4 cycle engine, are less durable. Generally speaking, they are usually much smaller for lightweight applications (chainsaws, some lawnmowers, etc.)

[ChuckFickens]

I'm assuming that Clanad's "suck and squeeze, blow and go" is an Americanism, although It certainly works it would more often be referred to as "suck, squeeze, bang, blow" in the UK