The Effect of Fuel Composition on Knock in Lean Burn SI Engine


Super lean burn is conceived as a method for improving the thermal efficiency of SI engine. Also, to improve the thermal efficiency, the ignition timing is advanced to advance the combustion phase. However, when the combustion phase is excessively advanced, knocking occurs, which hinders the improvement of thermal efficiency. It is necessary to avoid knocking because the amplitude of the large pressure wave may cause noise and damage to the engine. In this study, SIP surrogate fuels (S5H, S5R) were used to investigate the effect of differences in fuel compositions on knocking characteristics in lean burn SI engine. It was found that toluene suppresses knocking and n-heptane promotes in five fuel components.SIエンジンの熱効率向上の手法としてスーパーリーンバーンが構想されている.しかし,ノッキングの発生による弊害があるため,希薄予混合気のノッキング特性を把握する必要がある.本研究は,SIPサロゲート燃料(S5H,S5R)を用いて,燃料組成の違いが希薄運転時のノッキング特性に及ぼす影響について調査した.


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  • Accession Number: 01670668
  • Record Type: Publication
  • Source Agency: Japan Science and Technology Agency (JST)
  • Files: TRIS, JSTAGE
  • Created Date: Mar 31 2018 3:01PM