Woodward has patented a redundant fuel metering system for multi-stage combustors. The system uses a less critical stage’s fuel metering valve as a backup to the main valve in case of failure. A transfer system switches control seamlessly, ensuring continuous operation of the main combustor. GlobalData’s report on Woodward gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Woodward, Photovoltaic drones was a key innovation area identified from patents. Woodward's grant share as of May 2024 was 49%. Grant share is based on the ratio of number of grants to total number of patents.
Redundant fuel metering system for multi-stage combustion
A recently granted patent (Publication Number: US12000346B2) discloses a fuel metering system designed for a multi-stage combustion system, featuring a main combustion stage and at least one secondary combustion stage. The system comprises a main fuel metering system supplying fuel to the main combustion stage and a secondary fuel metering system supplying fuel to the secondary combustion stage. The main and secondary systems are equipped with electro-hydraulic servo valves (EHSVs) fluidly connected to fuel metering valves (FMVs) through a transfer valve. The transfer valve, including a multi-land piston, facilitates control pressures from the EHSVs to the FMVs, ensuring precise fuel metering during normal and backup modes of operation.
Furthermore, the patent details a method for metering fuel in a multi-stage combustion system, involving controlling the position of FMVs through EHSVs during normal operation and utilizing the secondary EHSV to control the main FMV during a backup mode. The system also includes failsafe mechanisms such as driving the secondary FMV to a failsafe position and blocking EHSVs from controlling FMV positions during backup mode, ensuring operational safety and reliability. The innovative design of the transfer valve, with a multi-land piston and dual coil EHSVs, enhances the efficiency and effectiveness of fuel metering in combustion systems with multiple stages, offering a robust solution for various applications.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
