Ignition coil

Spark plug

Carburetor

Fuel injector

Fuel pump

Fuel injector

Governor

Carburetor

To reduce mass of the engine per brake power

To reduce space occupied by the engine

To increase the power output of an engine when greater power is required

All of the above

F.P = B.P - I.P

F.P = I.P - B.P

F.P = B.P / I.P

F.P = I.P / B.P

Mechanical efficiency

Overall efficiency

Indicated thermal efficiency

Volumetric efficiency