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      KCI등재 SCOPUS

      혼합기의 유동과 점화특성이 기관성능에 미치는 영향

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      다국어 초록 (Multilingual Abstract)

      Lean burn combustion is an important concept for improving the fuel consumption and exhaust emissions. However, the lean burning is associated with increased cy치e-to-cycle combustion variations due to the ignition instabilities and reduced flame propagation rates. Engine stability under lean mixture conditions could be improved by increasing flame speed through enhanced flow characteristics and by securing ignitability with improvment of ig-nition systems.<br/>
      The effects of flow motion and ignition characteristics on the combustion performances were investigated in a 4-valve SI engine. Flow motions of tumble -swirl were varied with a swirl control valve attached at the inlet ports, while ignition energy and its distribution were controlled in a high-frequency ignition system by changing spark duration and spark frequency. The improvement of lean bum performance by the optimum flow motion and ignition characteristics is discussed.<br/>
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      Lean burn combustion is an important concept for improving the fuel consumption and exhaust emissions. However, the lean burning is associated with increased cy치e-to-cycle combustion variations due to the ignition instabilities and reduced flame pro...

      Lean burn combustion is an important concept for improving the fuel consumption and exhaust emissions. However, the lean burning is associated with increased cy치e-to-cycle combustion variations due to the ignition instabilities and reduced flame propagation rates. Engine stability under lean mixture conditions could be improved by increasing flame speed through enhanced flow characteristics and by securing ignitability with improvment of ig-nition systems.<br/>
      The effects of flow motion and ignition characteristics on the combustion performances were investigated in a 4-valve SI engine. Flow motions of tumble -swirl were varied with a swirl control valve attached at the inlet ports, while ignition energy and its distribution were controlled in a high-frequency ignition system by changing spark duration and spark frequency. The improvement of lean bum performance by the optimum flow motion and ignition characteristics is discussed.<br/>

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