Final answer:
A variable displacement pump can vary the amount of fuel discharged regardless of speed by adjusting the volume of fluid being discharged based on the speed of the pump motor.
Step-by-step explanation:
The type of pump that can vary the amount of fuel discharged regardless of speed is a variable displacement pump. This pump adjusts the volume of fluid being discharged based on the speed of the pump motor, allowing for precise control of fuel flow. It accomplishes this by using adjustable mechanisms such as swash plates or pistons to change the displacement or stroke volume of the pump.
For example, in the case of a variable displacement axial piston pump, the angle of the swash plate can be adjusted to change the stroke length of the pistons, thereby controlling the volume of fluid being discharged. This allows the pump to deliver different amounts of fuel at different speeds, ensuring optimal performance under varying operating conditions.
Other types of pumps, such as fixed displacement pumps, deliver a fixed amount of fluid per revolution and do not have the ability to vary the amount of fuel discharged regardless of speed.