Diesel Engine

4 strokes SI engine -Intake, Compression, Power & Exhaust

1. WHAT IS A DIESEL ENGINE ?
1.1 RECIPROCATING ENGINE

pistons moving forward & backwards to
produce power as
opposed to ratory engines.
example : diesel, pertol & steam engines

rotary engine -> turbine

1.2 INTERNEL COMBUSTION ENGINE

fuel burn inside the engine cyclinder

1.3 COMPRESSION IGNITION ENGINE

2 main type : spark ignition engines & compression ignition engine

SI : petrol
engine control amount of petrol &
air misture are drawn into the engine cylinder,
compressed & ignited by spark through the spark plug.

CI : diesel
maximum air is drawn into the engine
compressed to a temperature sufficient
to ignite diesel.
Diesel fuel is then injected into the compressed air
inside the cylinder &
ignited by the compressed air.

1.4 TWO OR FOUR STROKE ENGINE




2. History


2.1 COMPRESSION IGNITION ENGINE WAS DEVELOPED BY RUDOLPH DIESEL AND PATENTED IN 1892
2.2 THE DIESEL ENGINE WAS ORIGINALLY DEVELOPED AS AN ALTERNATIVE TO STEAM ENGINE WHICH WAS CONSIDERED INEFFICIENT
2.3 IT FIRST USED PEANUT OIL AS A FUEL – THE ORIGINAL BIODIESEL. ONLY IN 1920 WAS FOSSIL FUEL USED.
2.4 DIESEL ENGINES WERE ONLY USED AS A STATIONARY PRIME MOVER UNTIL 1930 WHEN THEY WERE DEVELOPED FOR VEHICULAR USE.



3. HOW A DIESEL ENGINE WORKS
• THE FOUR STROKE DIESEL CYCLE
• THE TWO STROKE DIESEL CYCLE
•THE THERMODYNAMICS CYCLE