PROBLEM TO BE SOLVED: To provide a valve opening degree measurement method, a valve opening degree measurement program, and a vehicular simulator, which enable an easy and accurate measurement of an opening degree of an open-close valve driven by a brushless motor.;SOLUTION: When zero-point learning is started for an EGR valve 20 driven by a brushless motor 21, the number of cumulative steps ST is reset, and then a cumulative addition of steps is started. When the zero-point learning is finished for the EGR valve 20, the number of cumulative steps ST counted at the finishing is stored as the number of in-learning steps ST0. Further, when the EGR valve 20 is opened and closed, the number of correction steps ST1 is calculated by subtracting the number of in-learning steps ST0 from the number of cumulative steps ST, and an opening degree OP1 of the EGR valve 20 is measured on the basis of the calculated number of correction steps ST1.;SELECTED DRAWING: Figure 5;COPYRIGHT: (C)2016,JPO&INPIT
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