5. The brief history of internal combustion engines.
What is an internal combustion engine?
Why do we need them in today’s world?
What do we use them for?
How do they work?
A brief discussion on diesel engines.
6.
7. Many designs have been made over the last 4
centuries but only a few men were recognized as
inventors.
The first person to invent a working internal
combustion engine automobile was Francois Isaac
de Rivaz of Switzerland in 1807. Mixing hydrogen
and oxygen for fuel.
The first gasoline powered engine was built in 1864
by a man named Siegfried Marcus and was said to
be the forerunner to the modern automobile. It
reached speeds up to ten mph.
In 1876 two of the greatest engines were invented.
The two and four stroke engine by Nikolaus August
Otto and Sir Dougald clerk. Starting the rise of
even better and more efficient machine.
12. The internal combustion of an engine is
considered to be the heart of the automobile.
They are defined as any engine that uses an
explosive combustion of fuel and air to push a
piston within a cylinder. Forming the repeating
cycle known as the strokes.
Intake, Compression, Power Stroke, and Exhaust
are the four actions of one stroke.
The difference between the two cycle and four
cycle engine is the number of strokes it uses to
start the fuel reaction of internal combustion.
Diesel engines unlike gasoline do not need spark
plugs to ignite the fuel. Instead it uses
compression but undergoes the same principle of
a stroke.
13.
14. This starts at the
highest point known
as top dead center
and ends at bottom
dead center
The intake stroke
allows the piston to
suck fuel and air into
the combustion
chamber through the
intake valve port.
15.
16. Compression starts at
bottom dead center
and ends at top dead
center.
The second motion of
the stroke takes all
the fuel and air that
was stored and
compresses it into
one tenth its original
sizes. Making the
air/fuel mixture
increase in
temperature
preparing it for the
next stage in its
combustion cycle.
17.
18. The power stroke
starts as soon as
the piston reaches
top dead center
allowing the spark
plug to ignite.
This electric
current created by
the spark plug
ignites the fuel and
air mixture
sending the piston
back down the
cylinder with a
pressure reaching
high as 600 PSI.
19.
20. The final stage of
the stroke releases
all the burned fuel
through the
exhaust valve.
As the piston
moves from bottom
dead center to top
dead center it takes
all the burned fuel
and pushes it out
of the cylinder,
preparing it for the
next cycle of
strokes.
24. Diesel engines work on the same principle
as the two and four stroke engines. They do
not need a spark plug to ignite the fuel.
During the intake stroke, air does not mixed
with the fuel in the cylinder. Instead as the
air reaches high enough compression Fuel
is then sprayed into the cylinder creating
ignition. This pushes the piston down the
cylinder at a pressure of 500 PSI, starting
the stroke all over again.
25. Internal combustion engines have ultimately
revolutionized the way we live.
With the small and light weight design of the two
cycle engine tasks like trimming the hedges and
cutting down weeds became easier and more
efficient. With the power of the four stroke we are
now able to dig up dirt and cut down trees with out
even breaking a sweat. Internal combustion
engines have made life easier since the first one
was built in the early 1800’s .
