Gas Valve Train 

Purpose

The overall goal is to increase the pressure of gas injected to two-stroke engines from 30 MPa to 60 MPa.A new gas valve train will be developed to enable the use of a higher gas pressure in two-stroke gas engines. The new gas valve train is a complex technology and each part has to be developed for a higher gas pressure and incorporated.

Outcome of project

The project has resulted in a new gas valve train (GVT) for 60 MPa natural gas fuelled two-stroke engines. The GVT enables the two-stroke engine to combust a larger variety of gasses in order to reduce emissions and improve fuel economy. In general, the project has resulted in a product expected to meet future market requirements.Among the involved partners, new features, technologies and methods have been implemented:
  • New sealing concept
  • Optimised flow through computational fluid dynamics (CFD) simulations
  • Modular-based double walled pipe design
  • Temperature compensation of pipe elongation
  • New optimised cartridge-based valve design
  • Surface treatment material with diamond like carbon (DLC)
  • Optimised online gas composition unit
  • Optimised mass flow measurement unit
  • Low maintenance demand
  • Class approval support of design

Partners

  • MAN Diesel & Turbo
  • Eltronic
  • Lloyd’s Register
  • LR-Marine
  • Dansk Analyse
  • Aalborg University, Dep. of Chemistry and Bioscience
  • Aalborg University, Dep. of Energy Technology