유동 및 고주파 점화 특성이 기관성능에 미치는 영향Effects of Flow and High Frequency Ignition Characteristics on the Engine Performance

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Lean burn combustion became an important concept for improving fuel economy and reducing exhaust emissions. However. lean burning is associated with increased cycle-to-cycle combustion variations due t o the ignition instabilities and reduced propagation rates. Engine stability under lean mixture conditions could be improved by increasing burning rates through enhanced flow characteristics and by securing ignitability with better ignition systems. The effects of flow and ignition characteristics on the combustion performances are investigated in a 4-valve SI engine. Flow characteristics of tumble-swirl were varied with 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 burn performance by the optimum flow and ignition characteristics was discussed.
Description
기계공학전공
Publisher
한국자동차공학회
Issue Date
1997-06
Language
Korean
Keywords

희박가연한계; 희박연소; 사이클 변동; 스월조절밸브; 고주파점화장치; 광역산소센서

Citation

한국자동차공학회 1997년 춘계학술대회 v.97 no. pp.152 - 159

URI
http://hdl.handle.net/10203/15732
Link
http://www.ksae.org/
Appears in Collection
ME-Conference Papers(학술회의논문)

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