An internal-combustion engine goes through four strokes:
intake, compression, combustion (power), and exhaust
. As the piston moves during each stroke, it turns the crankshaft.
What is a four stroke type spark ignition engine?
A four-stroke spark-ignition engine is
an Otto cycle engine
. It consists of following four strokes: suction or intake stroke, compression stroke, expansion or power stroke, exhaust stroke.
What are the 4 parts of a 4-stroke engine?
- Piston.
- Crankshaft.
- Camshaft.
- Spark plug.
- Cylinder.
- Valves.
- Carburetor.
- Flywheel.
What are the 4 strokes in the Otto four stroke engine?
The four strokes of the cycle are
intake, compression, power, and exhaust
. Each corresponds to one full stroke of the piston; therefore, the complete cycle requires two revolutions of the crankshaft to complete.
Which stroke in the four stroke cycle does the spark plug ignite?
What Are the Strokes of a 4-Cycle Engine?
At the end of the compression (previous) stroke
, the spark plug fires and ignites the compressed air/fuel mixture. This ignition/explosion forces the piston back down the cylinder bore and rotates the crankshaft, propelling the vehicle forward.
What is the difference between a 2-stroke engine and a 4-stroke engine?
In a 2-stroke engine, all five functions of the cycle are completed in only two strokes of the piston (or one revolution of the crankshaft). In a 4-stroke engine, the five functions require
four strokes
of the piston (or two revolutions of the crankshaft).
How can you tell the difference between a 2 stroke and a 4 stroke?
The main difference between a 4-stroke engine and a 2-stroke engine is that
a 4-stroke engine goes through four stages
, or two complete revolutions, to complete one power stroke, while a 2-stroke engine goes through 2 stages, or one complete revolution, to complete one power stroke.
What are 4 strokes in an engine?
An internal-combustion engine goes through four strokes:
intake, compression, combustion (power), and exhaust
. As the piston moves during each stroke, it turns the crankshaft. Encyclopædia Britannica, Inc.
What are the advantages and disadvantages of a 4 stroke engine?
More fuel efficiency :- 4 stroke engines have greater fuel efficiency than 2 stroke ones because fuel is consumed once every 4 strokes.
Less pollution
:- As power is generated once every 4 strokes & also as no oil or lubricant is added to the fuel; 4 stroke engine produces less pollution.
What is the difference between actual and ideal spark ignition cycle?
The largest difference between the two diagrams is the
simplification of the intake and exhaust strokes
in the ideal cycle. In the exhaust stroke, heat Q
out
is ejected to the environment, in a real engine, the gas leaves the engine and is replaced by a new mixture of air and fuel.
How many cylinders does a 4-stroke engine have?
All engines these days are 4-stroke engines (intake, compression, power, exhaust). With a
4 cylinder
engine, the overall balancing is perfect. Through every stroke made in a 4 cylinder engine, one cylinder is always in the power stroke and the rest are all at different positions than each other.
What is the most important part of a car engine?
Flywheel
is one of the most important engine components. It is a large and heavy metal wheel. Flywheel is attached to the back of the crankshaft to smooth out the firing impulses. It provides inertia to keep the crankshaft turning smoothly during the periods when no power is being applied.
What are the 3 main engine systems?
- Lubricating Oil System. …
- Main Bearing Oil System. …
- Crosshead Bearing Oil System. …
- Cylinder Lubrication System. …
- Cooling Water System. …
- Cooling Water System Description. …
- Fuel Oil System. …
- Circulation System.
Are cars 4 stroke?
The four-stroke engine is the
most common types
of internal combustion engines and is used in various automobiles (that specifically use gasoline as fuel) like cars, trucks, and some motorbikes (many motorbikes use a two stroke engine).
What is ideal Otto cycle?
In the ideal Otto cycle the fuel-air mixture is introduced during the induction stroke and compressed to a much lower compression ratio (around
8:1
) and is then ignited by a spark. The combustion results in a sudden jump in pressure while the volume remains essentially constant.
What is the correct sequence of strokes in four-stroke cycle engines?
Explanation: This is the functioning of a four-stroke internal combustion engine. Explanation: The correct sequence is
intake->compression->expansion->exhaust
and expansion stroke is also called power stroke.
