4FONTANA G,GALLONI E.Variable valve timing for fuel economy improvement in a small spark-ignition engine[J].Applied Energy,2009,86(1):96-105.
5KOSUKE N,HIROYUKI K,KAZUYA K.Valve timing and valve lift control mechanism for engines[J].Mechatronics,2006,16(2):121-129.
6VERHELST S,DEMUYNCK J,SIERENS R,et al.Impact of variable valve timing on power,emissions and backfire of abi-fuel hydrogen/gasoline engine[J].International Journal of Hydrogen Energy,2010,35(9):4399-4408.
7KREUTER P,HEUSER P,SCHEBLTZ M.Strategies to improve SI-Engine performance by means of variable intake lift-timing and duration[C]//SAE Paper.Detroit,USA:SAE International,1992:No.920449.
