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通过两种拟合方案———高次多项式函数法和Ｎ次谐波逼近法的对比，表明用Ｎ次谐波逼近法拟合ＥＱ６１００型汽油机的进气凸轮型线更精确，拟合出的升程曲线与原设计升程曲线最大偏差小于０．００２ｍｍ，得到的速度和加速度曲线均连续光滑。
The comparison between the two fitting schemes --- the high order polynomial function method and the Nth harmonic approximation method shows that fitting the intake cam profile of the EQ6100 gasoline engine with the Nth harmonic approximation method is more accurate. The maximum deviation between the lift curve and the original design lift curve is less than 0.002mm, and the obtained curves of speed and acceleration are continuous and smooth.