A study for high-efficiency and low NOx emission potential of High pressure Direct Injection Hydrogen Engine

  • Akira Katohno, Hydrogen Energy Research Center,Musashi Institute of Technology, Japan
  • Mr Tohru Honda, Hydrogen Energy Research Center,Musashi Institute of Technology, Japan
  • Mr Kaname Naganuma, Hydrogen Energy Research Center,Musashi Institute of Technology, Japan
  • Prof Kimitaka Yamane, Hydrogen Energy Research Center,Musashi Institute of Technology, Japan
  • Prof&Dr Yasuo Takagi, Hydrogen Energy Research Center,Musashi Institute of Technology, Japan
  • Dr Yoshio Sato, National Traffic Safety and Environment Laboratory, Japan
  • Dr Yuichi Goto, National Traffic Safety and Environment Laboratory, Japan

    • A compact flame travel combustion which is required for hydrogen SI engine to extract its high potential was realized in hydrogen SI engines with the combination of high injection rate based on high pressure direct injection of up to 20 MPa and the optimized strategy of fuel injection and spark ignition.
    Concept of the strategy is to achieve a minimum cobustion period in the high injection rate by the high pressure. In this study, it is obtained that injection shape is caused to a conbustion period even in the character of hydorogen combustion.
    As a result high output power, high thermal efficiency and low NOx emissions leveled competable to conventional diesel engine were achieved in high engine speed operating conditions.