Research on Effect of Center Direct Injection in Natural Gas Lean-Burn Engine

DOI

Bibliographic Information

Other Title
  • 天然ガス希薄燃焼エンジンにおけるセンタ直噴の効果に関する研究
  • ―天然ガスエンジンの熱効率向上―
  • - Thermal Efficiency Improvement of Natural Gas Engine -

Abstract

Center direct injection with supercharging engine is known as the method for improvement of engine output. To improve the thermal efficiency of the automotive spark-ignition engine with CNG, we applied lean combustion by using center direct injection. We tried to improve thermal efficiency by using single cylinder engine, and furthermore, we analyzed the engine data by fundamental experiment with Rapid Compression Machine (RCM) and numerical calculation. By optimization of the toroidal combustion chamber and swirl port and injection pattern and injection pressure, it was possible to optimize the air-fuel mixture distribution around spark plug. Therefore, it was possible to expand the lean limit A/F. Direct injection improved thermal efficiency compared to conventional port injection.

Journal

Keywords

Details 詳細情報について

  • CRID
    1390282679589497984
  • NII Article ID
    130006321590
  • DOI
    10.11351/jsaeronbun.47.1013
  • ISSN
    18830811
    02878321
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

Report a problem

Back to top