At what pressure range do electronic controls open the nozzles in variable nozzle systems?

In variable nozzle systems, electronic controls are designed to open the nozzles at a pressure range that allows for precise control over the flow of fluid, optimizing performance in various operational conditions. The correct pressure range, which encompasses 5500 to 20000 psi (379 to 1379 bar), reflects the high-pressure capabilities of these systems, ensuring they can efficiently handle demanding applications in heavy-duty machinery.

This range is particularly important because it supports the effective operation of hydraulic systems that require adaptability to varying load demands. By operating within this range, the nozzles can respond dynamically to changes in pressure, allowing for improved fuel efficiency, reduced emissions, and enhanced performance of the equipment.

The other options listed provide pressure ranges that either do not cover the required upper limit or fall short of the optimal performance metrics needed for electronic control systems in variable nozzle applications. Hence, the specified range in the correct answer situates it well within the operational parameters expected for maximal efficacy in these high-demand environments.