What is the primary function of the high-pressure engine driven pump?

The primary function of the high-pressure engine-driven pump is to deliver fuel under very high pressure to the Fuel Control Unit (FCU). This is crucial for the proper operational efficiency of jet engines. The FCU regulates the amount of fuel delivered to the engine based on various operating conditions, such as throttle position and altitude. By supplying fuel at high pressure, the pump ensures that the FCU can precisely control the fuel flow, which is essential for maintaining optimum engine performance, efficient combustion, and overall engine responsiveness.

In the context of turbine engines, if the fuel were not supplied under high pressure, it would be difficult to achieve the necessary atomization for proper combustion, leading to inefficiency and potential engine performance issues. The high-pressure system thus plays a vital role in the functionality and reliability of modern jet engines.