|
Sl
No.
|
Spark
Ignition Engine
|
Combustion
Ignition Engine
|
|
|
 |
 |
|
1
|
Works on Otto Cycle
|
Works on diesel Engine
|
|
2
|
Spark Plug is used
|
Fuel Injector is used
|
|
3
|
These are High Speed engines
|
These are Low Speed engines
|
|
4
|
These have Low Thermal
Efficiency
|
These have High Thermal
Efficiency
|
|
5
|
Petrol is Commonly used.
It has
high self ignition temperature.
|
Diesel is Commonly used.
It has
low self ignition temperature
|
|
6
|
Knocking takes place at the end of Combustion
|
Knocking takes place at the
beginning of Combustion
|
|
7
|
It is Constant Volume Cycle
|
It is Constant Pressure Cycle
|
|
8
|
High Pressure is generated as
it uses Homogeneous fuel mixture
|
Low Pressure is generated as it
uses Heterogeneous fuel mixture
|
|
9
|
Compression ratio is less
|
Compression ratio is High
|
