| 摘要 |
PURPOSE:To effectively prevent occurrence of a belt slip due to excitation during operation of an antilock brake system by locating a damper, damping acceleration and deceleration during operation of the antilock brake system, in the middle of a drive system running from a secondary shaft to a drive wheel. CONSTITUTION:When a risk of a wheel block occurs during brake effected by a pedal 31 on a low mu road during running of a vehicle, a wheel speed VW is rapidly reduced compared with a car body speed VB, and an antilock brake system is operated. In which case, a brake force during rapid brake is exerted on a part between a secondary pulley 8 and a belt 11 and a primary pulley 7 through a reduction gear 12 and a secondary shaft 6 from a drive wheel 16. But, in this case, a brake force is transmitted in a state to be damped through a drive system having a damper 50. During operation of the antilock brake system right after transmission of the brake force, a restoration force is exerted in a similar manner described above from the drive wheel 16, but since the current restoration force is also transmitted in a state to be damped by the damper 50. Thus, acceleration and deceleration of the primary pulley 7 and the part between the secondary pulley 8 and the belt 11 are varied to a low value and a slow state.
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