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1. SUBJECT : ELEMENTS OF MECHANICAL
TOPIC: TWO- STROKE DIESEL ENGINE

2.  A two-stroke, or two-cycle, engine is a type of
internal combustion engine which completes a power
cycle with two strokes (up and down movements) of
the piston during only one crankshaft revolution.
 This is in contrast to a "four-stroke engine", which
requires four strokes of the piston to complete a
power cycle. In a two-stroke engine, the end of the
combustion stroke and the beginning of the
compression stroke happen simultaneously, with the
intake and exhaust (or scavenging) functions
occurring at the same time.

4.  The Diesel cycle is a combustion process of a
reciprocating internal combustion engine. In it, fuel is
ignited by heat generated during the compression of
air in the combustion chamber, into which fuel is
then injected. This is in contrast to igniting the fuel-
air mixture with a spark plug as in the Otto cycle
(four-stroke/petrol) engine. Diesel engines are used
in aircraft, automobiles, power generation, diesel-
electric locomotives, and both surface ships and
submarines

5.  Diesel engines have the lowest specific fuel
consumption of any large internal combustion engine
employing a single cycle, 0.26 lb/hp·h (0.16 kg/kWh)
for very large marine engines (combined cycle power
plants are more efficient, but employ two engines
rather than one).
 Two-stroke diesels with high pressure forced
induction, particularly turbocharging, make up a
large percentage of the very largest diesel engines.

6.  Process 1 to 2 is isentropic
compression of the fluid
(blue)
 Process 2 to 3 is reversible
constant pressure heating
(red)
 Process 3 to 4 is isentropic
expansion (yellow)
 Process 4 to 1 is reversible
constant volume cooling
(green

7.  The 2-stroke diesel engine is an internal combustion engine with
the five events common to all such engines.
 First is intake, when a blower forces air alone into the cylinder.
 Compression, squeezing the air into a small volume. This is
when fuel is sprayed into the chamber.
 Ignition. Just as with a 4-stroke diesel engine, the heat of the
compressed air ignites the mixture of air and fuel. There is no
spark plug.
 Power, forcing the piston down.
 Exhaust, removing burned gases.
 All in just two strokes. The whole process is a cycle. Everything is
back where it began, ready to run again.

8.  The 2-stroke diesel
engine is an internal
combustion engine with
the five events common
to all such engines.
 First is intake, when a
blower forces air alone
into the cylinder.
 Compression, squeezing
the air into a small
volume. This is when fuel
is sprayed into the
chamber.

9.  Ignition. Just as with a 4-stroke diesel engine, the
heat of the compressed air ignites the mixture of air
and fuel. There is no spark plug.
 Power, forcing the piston down.
 Exhaust, removing burned gases.
 All in just two strokes. The whole process is a cycle.
Everything is back where it began, ready to run again.

10.  INJECTER
 PISTON
 CONNECTING ROD
 CRANK SHAFT
 INLET PORT
 EXHUST PORT
 TRANSPHER PORT

11.  High engine speeds of about 3000 rpm.
 Lighter in a weight because maximum pressure
and temperature is less.
 Less initial cost.
 Less maintenance cost.

12.  HIGH compression ratio ranging from 15 to 17.
 The thermal efficiency is HIGHER due to HIGHER
compression ratio.
 Running cost higher because petrol is costlier.

13.  AUTOMOBILE VEHICLE MOPED
 GENERATER

14.  https://en.wikipedia.org/w/index.php?search=TWO+STROK+DIESEL
+ENGINE+WORKIMG&title=Special%3ASearch&go=Go
 https://www.google.co.in/search?q=TWO+STROK+DIESEL+ENGENE
+PHOTO&ie=utf-8&oe=utf-
8&gws_rd=cr&ei=iyFlVsiJIoSY0gTWxqrQBA