SPEED CHANGE CONTROL METHOD OF CONTINUOUSLY VARIABLE TRANSMISSION

摘要

PURPOSE:To improve reliability of speed change control by controlling speed change so that limiting value may be varied in accordance with the difference between an engine speed trigger or target engine speed in a stationary condition and final target engine speed. CONSTITUTION:At the time of transitional correction of target engine speed (NESPR) in a stationary condition, filter processing (301) is applied to the target engine speed NESPR in a stationary condition (301) and variation quantity of final target engine speed (NESPRF) per unit time is set in accordance with limitation taking the preceding final target engine speed NESPRF into consideration. Speed change then is controlled (302) so as to vary the limiting value in accordance with the difference between the engine speed trigger or the target engine speed NESPR in a stationary condition and the final target engine speed NESPRF. Thus transitional correction of the target engine speed NESPR in a stationary condition can be prevented from exceeding the necessary quantity and the reliability of speed change control is improved.