| 摘要 |
<p>A control method controls a belt-and-pulley continuously variable transmission having driver (H) and driven (K) pulleys mounted respectively on input and output shafts, a V-belt (I) engaged around the driver (H) and driven (K) pulleys, and an oil pressure source and an oil drain unit operatively coupled to first and second hydraulic pressure chambers (21A,53A) for axially moving the movable conical members (21,51) of the driver (H) and driven (K) pulleys to vary effective diameters of the driver (H) and driven (K) pulleys for controlling a transmission ratio. The movable conical members (21,51) of the driver (H) and driven (K) pulleys are movable in synchronism with each other. The hydraulic pressure chamber (21A,51A) of one of the driver (H) and driven (K) pulleys which is to increase the effective diameter thereof at a time, is first brought into communication with the oil pressure source. Then, the hydraulic pressure chamber (21A,51A) of the other of the driver (H) and driven (K) pulleys which is to reduce the effective diameter thereof at the time, is brought into communication with the oil drain unit, for thereby starting to move the movable conical members (21,51).</p> |
