| 摘要 |
When a method for operating a reference speed judges that an ABS control is being executed, the method judges whether the ABS control is being executed to a front wheel or not. When the method judges that the ABS control is not executed to the front wheel, the method considers that the lifting of a rear wheel does not occur, and makes the reference speed follow the fastest wheel speed VRH. When the method judges that the ABS control is being executed to the front wheel, and further judges that a reference body deceleration is a predetermined value or more, the method considers that the lifting of the rear wheel has occurred, and makes the reference speed follow a speed VRM. The speed VRM is a wheel speed calculated in accordance with the following formula: VRM=alphaVRL+(1-alpha)VRH (0<alpha<1), where a character VRL indicates the slowest wheel speed, and a character alpha indicates a default.
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