How does a 2 stroke engine work, explain whats happening below the piston and above the piston?
when the piston is at the bottom there is no fuel and not much air above the piston head, then as the piston rises again the fuel and air mixture is forced into the bore and up above the piston, as the piston travels up the bore pressure above the piston rises until it is compressed so much it explodes. The piston is forced back down at a rapid rate as the exhaust is sucked out of the cylinder due to a vacuum effect, then it begins all over again...
Why do 2 stroke engines have caged roll bearings?
Rolling bearing are just two circular rings of metal that are joined together by a series of ball bearings. this means that they can withstand high speeds and are very durable as long as they are cooled while in use. they are used in the two stroke engines to reduce friction and are found around the shaft supporting the pistons.
Why do the 2 stroke piston have pins between the pison gap?
Will have to ask and fill in later...
Whats the difference between a 2 and 4 stroke engine?
"Stroke" is just referring to the movement of the piston in the engine block. 2 Stroke means one stroke in each direction. A 2 stoke engine will have a compression stroke followed by an explosion made from the mixed fuel and oxygen. On the return stroke new fuel mixture is inserted into the cylinder.
A 4 stroke engine has 1 compression stroke and 1 exhaust stoke. Each is followed by a return stroke. The compression stroke compresses the fuel air mixture prior to the gas explosion. The exhaust stroke simply pushes the burnt gases out the exhaust.
Here is a common list of all the advantages and disadvantages of the two stroke engine:
Advantages of 2 Stroke Engines:
- Two-stroke engines do not have valves, simplifying their construction.
- Two-stroke engines fire once every revolution (four-stroke engines fire once every other revolution). This gives two-stroke engines a significant power boost.
- Two-stroke engines are lighter, and cost less to manufacture.
- Two-stroke engines have the potential for about twice the power in the same size because there are twice as many power strokes per revolution.
- Two-stroke engines do not have valves, simplifying their construction.
- Two-stroke engines fire once every revolution (four-stroke engines fire once every other revolution). This gives two-stroke engines a significant power boost.
- Two-stroke engines are lighter, and cost less to manufacture.
- Two-stroke engines have the potential for about twice the power in the same size because there are twice as many power strokes per revolution.
Disadvantages of 2 Stroke Engines:
- Two-stroke engines don't live as long as four-stroke engines. The lack of a dedicated lubrication system means that the parts of a two-stroke engine wear-out faster. Two-stroke engines require a mix of oil in with the gas to lubricate the crankshaft, connecting rod and cylinder walls.
- Two-stroke oil can be expensive. Mixing ratio is about 4 ounces per gallon of gas: burning about a gallon of oil every 1,000 miles.
- Two-stroke engines do not use fuel efficiently, yielding fewer miles per gallon.
- Two-stroke engines produce more pollution.
From:
-- The combustion of the oil in the gas. The oil makes all two-stroke engines smoky to some extent, and a badly worn two-stroke engine can emit more oily smoke.
-- Each time a new mix of air/fuel is loaded into the combustion chamber, part of it leaks out through the exhaust port.
- Two-stroke engines don't live as long as four-stroke engines. The lack of a dedicated lubrication system means that the parts of a two-stroke engine wear-out faster. Two-stroke engines require a mix of oil in with the gas to lubricate the crankshaft, connecting rod and cylinder walls.
- Two-stroke oil can be expensive. Mixing ratio is about 4 ounces per gallon of gas: burning about a gallon of oil every 1,000 miles.
- Two-stroke engines do not use fuel efficiently, yielding fewer miles per gallon.
- Two-stroke engines produce more pollution.
From:
-- The combustion of the oil in the gas. The oil makes all two-stroke engines smoky to some extent, and a badly worn two-stroke engine can emit more oily smoke.
-- Each time a new mix of air/fuel is loaded into the combustion chamber, part of it leaks out through the exhaust port.
www.animatedengines.com/twostroke.shtml
awesome work
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