By plunger

By control sleeve

By control rack

By injection

Completing combustion

Delaying combustion

Advance combustion

Initiating combustion

To supply more fuel to filter

To send back excess diesel to fuel tank

To supply clean diesel

To take the leaking fuel

Minimize the slashing of fuel in the tank

To strengthen the fuel tank

To make chambers in the fuel tank

To make square and lengthy fuel tank

To assist easy starting under cold condition

To assist stop under cold condition

To provide rich fuel under cold condition

To provide very less fuel supply