New Woodward fuel injectors for large engines using Power-to-X fuels

A new range of fuel injection systems for large marine engines using ‘Power-to-X’ fuels, including ammonia and methanol, has been released by Woodward.

First displayed at SMM 2024 in Hamburg, the fuel injectors have been added to medium-pressure injection (MPI) and high-pressure dual-fuel (HPDF) product lines.

The new MPI product line has direct actuated technology for port fuel injection or medium pressure direct injection. These injectors are designed for large marine engines using different fuels and combustion strategies, supporting liquid fuels (methanol, ethanol or ammonia) and gaseous fuels (hydrogen) injection with electronically controlled common rail technology, with up to 250 bar injection pressure. The injectors can be customised to match an engine’s requirement in terms of nozzle positioning, fuel inlet and packaging, while maintaining high commonality with the family.

The HPDF product line has a twin nozzle concept, with two injectors in one unit. One side of the injector is for ammonia or methanol injection up to 700 bar injection pressure with electronically controlled common rail technology, and the other side for diesel injection for pilot-ignition or full back-up capability. The diesel-side is offered with mechanical injection (pump-line-nozzle technology) or common rail technology, depending on engine requirements.

Woodward noted the twin-needle dual-fuel injector concept is much easier to integrate into a cylinder head compared with two separate injectors as both nozzles are in the centre of the cylinder for optimised combustion.