We already discussed about automobile engine in our previous post. Now we will discuss about 2-stroke and 4-stroke engine in detail along with their basic differences in this post.Normally 2-stroke and 4-stroke both engine performs suction , compression, power and exhaust strokes.So,now lets discuss about this strokes in 2-stroke engine.
2-stroke engine
- Suction stroke
It is the initial stage of an engine. when we start the engine and mesh the gears suction stroke is performed by engine. In suction stroke piston moves T.D.C (top dead center) to B.D.C (bottom dead center). In that position fuel enters in combustion chamber.This is the small chamber where fuel burns.After this moment crank shaft rotates 0 to 90 degree.In this stroke inlet port remains open and outlet port becomes close.The entire process done by piston surface only.After this process compression stroke begins.
- Compression stroke
In this stroke piston moves B.D.C to T.D.C and fuel is compressed by piston top surface.In this stroke crank shaft rotates 90 to 180 degree.The stroke inlet and outlet both port remains close.In 2-stroke engine suction and compression both stroke performs together..
- Power stroke
In this stroke piston moves T.D.C to B.D.C again.and crank shaft rotates 180 to 270 degree.Here stroke inlet and outlet both port remains close. In that stroke spark plug gives the spark to fuel and fuel burns.So it is the most important stroke of engine.Just because of this stroke engine starts.
- Exhaust stroke
2 – stroke engines are generally used in two wheeler and mopeds.Though currently in all vehicles we're using 4 – stroke engine.
4 – Stroke engine
As we stated before 2 stroke and 4 stroke both engine performs same strokes.So now lets understand suction , compression , power and exhaust stroke in 4- stroke engine.
- Suction stroke
- Compression stroke
- Power stroke
- Exhaust stroke
Now we are knowledgeable about 2 stroke and 4 stroke engine.As we knew that in both engine all the processes are same but there are little difference between two stroke and four stroke engine.
Basic Differences
- In 2 stroke engine we use port for passing the fuel whereas in 4 stroke engine we use valves for passing the fuel.
- 2 stroke engine made in single cylinder it has no firing order whereas 4 stroke engine are made in multi – cylinder so this has a firing order as per cylinder used.
- 2- stroke engine is less efficient and more fuel consumptive whereas 4-stroke engine is more efficient and less fuel consumptive comparatively.
- 2 – stroke engines uses in mopeds and 2 wheelers only whereas 4 stroke engines are used in cars and other commercial vehicles.
I have a question which kinds of cars need a 2 stroke engine and which needs a 4 stroke engine?
ReplyDeleteThis is a good help for engine information..Thank you for sharing!
ReplyDeleteIt's nice to know the difference between 2 strokes and 4 strokes engines.
ReplyDelete