| 摘要 |
<p>A vehicle belt-type continuously variable transmission expands the operating range in which belt slip control is permitted with maintained estimated accuracy of a belt slip condition, to reduce drive energy consumption owing to a reduction in belt friction. It includes a primary pulley (42) and a secondary pulley (43) around which a belt (44) is wound to control gear ratio by controlling primary and secondary hydraulic pressures, a belt slip control means ( Fig. 8 ) for controlling secondary hydraulic pressure according to a phase difference (¸) between oscillation components due to oscillation included in an actual gear ratio and in an actual secondary hydraulic pressure, and a transmission speed limiting means (step S23 in Fig. 12 ) for determining whether or not to limit vehicle acceleration according to a predetermined acceleration limit permitting condition (steps S21, S22, S26) and limiting a transmission speed to less than a predetermined value when determining to limit the vehicle acceleration.</p> |
