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Dual-Fuel Injectors

Single-needle DF injectors:
A simplified injection system

 

We have developed a simplified injection system for dual-fuel engines with homogeneous combustion. Since less space in the cylinder head is needed, a suitable injection system is available for close to all engine sizes.

 


 

FEATURES & FUNCTIONALITY

 

Despite their many advantages, such as high flexibility and operating reliability, current dual-fuel injection systems have one disadvantage: They are large and complex and therefore need correspondingly large installation space. Single-needle injection systems simplify dual-fuel engine layouts. We have developed a simplified injection system for dual-fuel engines with homogeneous combustion. It consists of a single fuel circuit with one high-pressure pump plus one injector per engine cylinder. This allows major improvements in terms of installation space and complexity. Only one injector with one nozzle or one needle is necessary per cylinder. The injector features a single-needle nozzle, which injects the pilot quantity and full load in the liquid-fuel operation. The proposed single-nozzle dual-fuel technology is expected to result in a simplified system layout for dual-fuel engines. Due to the reduced dimensions of the injector, less space in the cylinder head is needed and therefore, a suitable injection system is available for almost all engine sizes. Remaining challenges for further improvement of low NOx applications (1 g/kWh) are enhanced spray penetration as well as spray pattern symmetry for a pilot fuel amount below 1%. Promising measures are currently under development and will soon be ready for engine tests. We are also developing a new high-gas-pressure injection system for heterogeneous combustion engines.

 


 

KEY FEATURES

 

  • Simplified design for low- pressure dual-fuel systems.
  • A suitable injection system is available for almost all engine sizes.
  • Only one injector with one nozzle or one needle is necessary per cylinder.
  • Major improvements in terms of installation space and complexity.
  • The proposed single-nozzle dual-fuel technology is expected to lead to a simplified system layout for dual-fuel engines.
  • Our injectors are well-suited to deliver the required shot-to-shot stability.

 

  • Robust design to reach highest service life expectations.
  • High precision and exceptional reliability.
  • Technical support from concept development to aftersales service.
  • Leading engine manufacturers (OEM) trust in our products.

 


 

 


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CONTACT OUR SALES TEAM WITH ANY QUESTIONS: 

SALES.LORANGE@WOODWARD.COM