Today we will discuss about difference between Diesel cycle
vs Otto Cycle. Both these cycle are air standard cycles of automobile engines.
Otto cycle is used for petrol or spark ignition engine while diesel cycle is
used for diesel or compression ignition engine.
The main difference between Otto cycle and Diesel cycle is
that in Otto cycle heat addition takes place at constant volume and in diesel
cycle heat addition takes places at constant pressure. This is the major difference
between Otto cycle and diesel cycle. There are many other differences which are
described below.
Diesel cycle vs Otto Cycle:
S.No.
|
Otto Cycle
|
Diesel Cycle
|
1.
|
Otto cycle is given by the Nicolas Otto in 1876.
|
It was given by Dr. Rudolph Diesel in 1897.
|
2.
|
It is ideal cycle for petrol engine.
|
It is ideal cycle for diesel engine.
|
3.
|
Otto cycle has higher thermal efficiency.
|
It has lower thermal efficiency.
|
4.
|
This cycle has comparatively low compression ratio. It compresses
the mixture up to 11:1 ratio.
|
Diesel cycle has high compression ratio. It compresses the
mixture up to 22.1 ratios.
|
5.
|
Otto cycle engine used spark plunge to ignite the air fuel
mixture.
|
Fuel automatically ignites due to high temperature of compressed
gas.
|
6.
|
Heat addition takes place at constant volume.
|
Heat addition takes place at constant pressure.
|
7.
|
Air fuel mixture drawn into the cylinder during intake
stroke.
|
Once air is drawn into intake stroke. Fuel is injected
after end or compression stroke by an injector.
|
These are all about Otto cycle and diesel cycle. If we have
missed something, kindly let us know through commenting.