Decisive manner and decisive device null of Wiebe functional

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_total[J]: calorific value of fuel supplied to the cylinder; θ[degCA]: elapsed crank angle after start of heat generation; θ_p[degCA]: combustion period; m: shape parameter; and k: efficiency), an actual combustion rate α at 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 rate α, by formula (II), the value of the shape parameter m is determined.;COPYRIGHT: (C)2007,JPO&INPIT