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New split-cycle concept to control diesel HCCI combustion

Green Car Congress

Increasing engine speed from 2000 to 6000 rpm, indicated thermal efficiency decreases from 47% to 45% for the turbocharged case and from 46% to 44% for the naturally aspirated one due to higher pressure losses in the transfer phase. Pollutant emission behavior vs. engine speed.confirms the validity of the HCPC combustion concept.

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