Hi..got a question on pistons.

For a 4-stroke internal combustion engine, I do know that during the 3rd stroke(power), the spark plug ignites the air/fuel mixture which creates a pressure which forces down the piston.

But what causes the piston to move up and down during the other 3 strokes? namely, intake, compression and exhaust.

Do correct me where I'm wrong.

Thank you.

Inertia? other cilinders on power stroke?

The flywheel keeps the crank spinning

The flywheel keeps the crank spinning
Actually the crank keeps the flywheel spinning. The piston is brought back up by the piston on the other side of the block when it gets pushed down the opposite one goes up..

look here...http://auto.howstuffworks.com/engine3.htm

You are saying what I said, don't you?

It's simply the other pistons like Joso said..........

OFF TOPIC: How long has it been since I've posted here?

Actually the crank keeps the flywheel spinning. The piston is brought back up by the piston on the other side of the block when it gets pushed down the opposite one goes up..
In a single cylinder engine?

<In a single cylinder engine?>

The inertia of rotation -- as was said above... any engine turning a couple of hundred revs has enough to go through a couple of 4-cycle cycles before it spins to a stop -- although one-lungers tend to have heavier flywheels to help smooth `em out as well (see your lawn-mower... mass of the blade also helps in this case)

If you've ever pull started (or kick started) as small engine and not had it fire, you can hear it spin a couple of times... and that is usually in the order of 150rpms, well below most engine's idle speed...

Larry
Virginia, USA

Actually the crank keeps the flywheel spinning. The piston is brought back up by the piston on the other side of the block when it gets pushed down the opposite one goes up..
the civicproject is 100% correct.do some more research

<In a single cylinder engine?>

The inertia of rotation -- as was said above... any engine turning a couple of hundred revs has enough to go through a couple of 4-cycle cycles before it spins to a stop -- although one-lungers tend to have heavier flywheels to help smooth `em out as well (see your lawn-mower... mass of the blade also helps in this case)

If you've ever pull started (or kick started) as small engine and not had it fire, you can hear it spin a couple of times... and that is usually in the order of 150rpms, well below most engine's idle speed...

Larry
Virginia, USA
Exactly, what keeps inertia? A big metal plate.
And thermodynamics, you are in no place to tell people to do research.

Actually the crank keeps the flywheel spinning. The piston is brought back up by the piston on the other side of the block when it gets pushed down the opposite one goes up..
Tell us what is the use of the flywheel

To give the crank shaft and therefore everything conected to it inertia.

To give the crank shaft and therefore everything conected to it inertia.
to give the crankshaft what ?

http://images-eu.amazon.com/images/P/0198613474.02.LZZZZZZZ.jpg
Please read it.

you should have typed ...to give the crankshaft and every thing connected to it inertia
there was no need for therefore

you should reda it ,you suppose to state what was given to the crankshaft before you used a conjuntion

There's no need for this stupidity, there's no need for two extra warnings in your sig, there's no need for god aweful punctuation, there's no need for your last 35 posts. We deal with it, why don't you?

read your private messages

what did I say was so offensive.....just go to show you know your are wrong

I am wrong that the flywheel is designed to keep inertia on the crank? Look it up dude. When everyone in the world disagrees with you, most of the time it's 'cause your wrong

because of your laungage not the inertia part thats correct

Yet again I say you are in no place to judge.

And once more a flame war! Please don't convert almost every thread into a fight. Pleaseeeeeeeeee :p

A 3.0L/250 Ferarri V-12 would run just fine with no flywheel. It has a firing impulse every 60 degrees. In practice they had the least flywheel that they could bolt a clutch to.

Yet again I say you are in no place to judge.
What you are basicly saying that the flywheel is powering the crank.. thats funny.. lets all walk backwards please!
Got any expirence in cars? I smell not.

Ahhhh yet another one who can't read for sh*t. INERTIA you idiots, INERTIA.

What you are basicly saying that the flywheel is powering the crank.. thats funny.. lets all walk backwards please!
Got any expirence in cars? I smell not.

Bofomills. If a engine had no flywheel, the engine won't run properly. It would stall after every combustion.

Like I allways say, you should inform yourself before talking about something you really doesn't know too much. Specially when you are telling someone he is wrong.

Bofomills. If a engine had no flywheel, the engine won't run properly. It would stall after every combustion.

Like I allways say, you should inform yourself before talking about something you really doesn't know too much. Specially when you are telling someone he is wrong.
You're talking about something different, thats now what we are talking about or are we ? I don't know maybe I should post when im awake ><