Nozzle for an engine, and engine

The use of a displaceable sliding body in the fuel line, utilizing pressure differences, addresses the weight challenge of traditional valves by offering a lightweight and efficient fuel flow mechanism for aviation engines.

US20260168673A1Pending Publication Date: 2026-06-18ROLLS ROYCE DEUT LTD & CO KG
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
ROLLS ROYCE DEUT LTD & CO KG
Filing Date
2025-11-05
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

Existing nozzle designs for aviation engines with pressure-jet atomizers face challenges in providing weight-optimized mechanisms for connecting and disconnecting fuel mass flow due to the high weight of traditional valve systems.

⚗Method used

A displaceable sliding body is used in the second fuel line, which blocks or opens the fuel line fluid-tightly based on pressure differences within the fuel and combustion chamber, utilizing a hydro-pneumatic adjustment mechanism without active control, allowing passive displacement for weight optimization.

🎯Benefits of technology

This design provides a simple and reliable mechanism for connecting and disconnecting fuel flow, reducing weight and maintaining efficient fuel supply across varying engine power conditions.

✦ Generated by Eureka AI based on patent content.

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Abstract

A nozzle for an engine includes a nozzle main body oriented along an axis, a central fuel supply unit on the axis and a fuel nozzle body including a downstream central pressure-jet atomizer for injecting atomized liquid fuel into a combustion chamber. A central fuel line opens into a central injection arrangement, and a second fuel supply surrounds the central fuel supply with a second fuel line opening into a second injection arrangement. The second fuel line has radial inner and outer walls with an air duct arranged around the fuel supply unit. A weight-optimized design of a fuel connection and disconnection device is achieved by arranging, in the second fuel line, an axially displaceable, sliding body, which, in a first position, blocks the second fuel line in a fluid-tight manner and, in a second position, releases the second fuel line to allow fuel to pass through.
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