| 摘要 |
PROBLEM TO BE SOLVED: To accurately determine a Wiebe function parameter for expressing a heat generation pattern in a cylinder of an internal combustion engine regarding a determination method and a determination device for a Wiebe function parameter. SOLUTION: In the determination method of the Wiebe function parameter, upon determining the Wiebe function parameter expressed by formula (I) (here, Q[J]:heat generation amount in the cylinder of the internal combustion engine; Q<SB>total</SB>[J]: calorific value of fuel supplied to the cylinder;θ[degCA]: elapsed crank angle after start of heat generation;θ<SB>p</SB>[degCA]: combustion period; m: shape parameter; and k: efficiency), an actual combustion rateαat a crank angle where the actual heat generation rate is the maximum in the cylinder of the internal combustion engine. Based on the actual combustion rateα, by formula (II), the value of the shape parameter m is determined. COPYRIGHT: (C)2007,JPO&INPIT
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