2-stroke ,4-stroke vehicles
2006-08-29 01:00:08 · 6 answers · asked by venom 1 in Cars & Transportation ➔ Motorcycles
movement of piston up & down in a second
2006-08-29 05:59:53 · answer #1 · answered by prince 6 · 0⤊ 2⤋
Defining strokee is simple, a two strok has no valves, it sucks gas and air into the crankcase on the up stroke and then from the crankcase in the cylinder on the down stroke firing the spark plug every time the piston reaches the top of the stroke.
A four stroke has valves and only fires once every two revolutions of the crank. starting with the firing of the plug the piston goes down, when It comes back up the exhaust valve opens allowing the burned fuel to be pushed out. when the piston get to the top there is not firing of the plug, down stroke following this the in take valve opens allowing fuel to be sucked into the cylinder. The up stroke compresses the fuel and the plug fires to cause the combustion stroke again.
PS the movement of the piston "up and down" in a minute is not stroke but rather RPM ( revolutions per minute)
2006-08-29 12:54:05 · answer #2 · answered by dreamwever4u2 5 · 0⤊ 0⤋
-When the piston moves from the bottem of the cylinder to the top, that's one stroke.
-When the piston moves from the top of the cylinder to the bottem, that's another stroke.
-When talking of 2 & 4 stroke engines, that's how many strokes an engine makes, to complete a cycle of sucking fuel in and blowing exhaust out.
-That's why engines are also refered to as 2 & 4 cycle engines.
-Here...watch a couple of videos of 2 & 4 stroke engines in action.
2 Stroke
http://www.howstuffworks.com/two-stroke2.htm
4 Stroke
http://www.howstuffworks.com/engine.htm
2006-08-29 03:52:00 · answer #3 · answered by guardrailjim 7 · 0⤊ 0⤋
(there's an echo in here!)
Stroke is the measurement of distance the piston travels in millimeters. Bore is the diameter of the barrel in which the piston travels. Specifications quote Stroke and Bore sizes. A "square" engine has both figures the same. Modern bikes tend to have a shorter stroke than the bore size, hence "short-stroke", these engines rev faster than old ones.
A 2-stroke goes up-bang-down-up-bang-down
so it has two strokes for each explosion
A 4-stroke goes up-bang-down-up (exhaust)-down-up-bang etc
so it has four strokes for each explosion
2006-08-29 01:48:25 · answer #4 · answered by XT rider 7 · 1⤊ 1⤋
piston movement... whether it makes a complete rotation, or a cycle, with two strokes or four stokes..... that matters the name.
2006-08-29 01:05:10 · answer #5 · answered by MADDY 3 · 0⤊ 1⤋
piston movement... whether it makes a complete rotation, or a cycle, with two strokes or four stokes..... that matters the name
2006-08-29 01:08:52 · answer #6 · answered by saquib M 2 · 0⤊ 3⤋