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1·Experiments conducted with moderate compression ratios (10.4 and 15) and using two modes of HCCI control, i. e. intake heating and NVO (Negative Valve Overlap) received the expected results.

试验在一个专用于HCCI研究的单缸发动机上实施，采用两种中等的压缩比(10.4和15)和两种HCCI模式(进气加热和负气门叠开)，试验结果证实了这种期望。