车用发动机
車用髮動機
차용발동궤
2013年
4期
56-59,65
,共5页
张健%虞坚%滕勤
張健%虞堅%滕勤
장건%우견%등근
直喷汽油机%爆震%二次喷射%烟度
直噴汽油機%爆震%二次噴射%煙度
직분기유궤%폭진%이차분사%연도
gasoline diect injection engine%knock%double injection%smoke
为了研究缸内直喷发动机低速大负荷工况超级爆震的抑制措施，有效降低超级爆震的频次，基于优化后的单次喷射相位和燃油轨压，采用降低烟度方式确定二次喷射中后喷的相位和喷油比例，结合早燃（PI ）稳态测试循环，通过发动机台架试验比较了两种喷射方式下的超级爆震频次。结果表明，二次喷射能够有效地降低发动机烟度，并对超级爆震具有良好的抑制效果。
為瞭研究缸內直噴髮動機低速大負荷工況超級爆震的抑製措施，有效降低超級爆震的頻次，基于優化後的單次噴射相位和燃油軌壓，採用降低煙度方式確定二次噴射中後噴的相位和噴油比例，結閤早燃（PI ）穩態測試循環，通過髮動機檯架試驗比較瞭兩種噴射方式下的超級爆震頻次。結果錶明，二次噴射能夠有效地降低髮動機煙度，併對超級爆震具有良好的抑製效果。
위료연구항내직분발동궤저속대부하공황초급폭진적억제조시，유효강저초급폭진적빈차，기우우화후적단차분사상위화연유궤압，채용강저연도방식학정이차분사중후분적상위화분유비례，결합조연（PI ）은태측시순배，통과발동궤태가시험비교료량충분사방식하적초급폭진빈차。결과표명，이차분사능구유효지강저발동궤연도，병대초급폭진구유량호적억제효과。
In order to investigate the suppression measures of super-knock in a turbocharged gasoline direct injection (GDI) engine at low speed and high load as well as to reduce super-knock frequency effectively ,the post-injection phase and injection ratio of secondary injection were determined by reducing the smoke based on the optimized single injection phase and fuel rail pressure .Combined with the pre-ignition (PI) steady state test cycle ,the frequencies of super-knock in two injection modes were compared in the engine bench test .The results show that double injection can effectively reduce the engine smoke and has the good suppression effect on super-knock .
