The document compares petrol and diesel engines. Petrol engines use spark ignition and gasoline as fuel, were invented in 1876, and operate on the Otto cycle. They have higher rpm, lighter weight, and lower costs but lower efficiency. Applications include cars, motorcycles, aircraft and small engines. Diesel engines were invented later and have higher compression ratios and efficiency. They rely on air compression instead of spark plugs. Diesel engines have better efficiency and reliability but also more emissions and noise. They are often used in trucks, buses, generators and irrigation pumps.

1. PETROL ENGINE
VS
DIESEL ENGINE
PRESENTED BY:
KUNJAL KUMAR SINHA (MEB14043)

2. PETROL ENGINE
INTRODUCTION
A petrol engine (known as a gasoline engine) is an internal
combustion engine with the spark ignition. so it is also known as
spark ignition(s.i engine).
it was invented in 1876 in Germany by German inventor Nicolaus
august Otto.
fuel used in a petrol engine is a gasoline ( petrol ) and similar volatile
fuel.
the petrol engine works on principle of theoretically Otto
cycle(constant volume cycle).

3. WORKING OF FOUR STOKE CYCLE

4. ADVANTAGES OF PETROL ENGINE
high engine speeds of about 3000 rpm.
lighter in a weight because maximum pressure and temperature is less.
less initial cost.
less maintenance cost.
DISADVANTAGES OF PETROL ENGINE
low compression ratio ranging from 6 to 10.
the thermal efficiency is lower due to lower compression ratio.
running cost higher because petrol is costlier

5. APPLICATIONS
PETROL ENGINES HAVE MANY APPLICATIONS, INCLUDING:
motor cars
motorcycles
aircraft
motorboats
small engines, such as lawn mowers, chainsaws and portable engine-generators

6. DIESEL ENGINE
INTRODUCTION
Invented by Rudolf diesel
the diesel engine (also known as a compression-ignition engine) is an internal
combustion engine.
it has the highest thermal efficiency due to its very high compression ratio.
Diesel engines work by compressing only the air.

7. WORKING

8. ADVANTAGES:
self ignition (without electrical spark plug)
better efficiency
reliability
higher durability
supplied with worse fuels
DRAWBACKS:
more NOx production
more expensive production
more weight
louder
lower revolutions

9. APPLICATION
TRANSPORT USES-
larger transport applications (trucks, buses, etc.) also benefit from the diesel
reliability and high torque output.
NON TRANSPORT USES-
irrigation pumps, corn grinders, generators.

10. REFRENCES
HTTPS://WWW.SLIDESHARE.NET/KANHAIYA879314/PETROL-ENGINE-VS-
DIESEL-ENGINE
HTTPS://WWW.SLIDESHARE.NET/AKASH1001/INTERNAL-COMBUSTION-
ENGINES-PPT
WIKIPEDIA

11. THANK YOU