Steuerungsanlage für ein stufenloses Getriebe.

摘要

An apparatus for controlling a continuously variable vehicle transmission (4) includes a fixed pulley member (6,12) and a movable pulley member (8,14) which is supported for movement toward and away from the fixed pulley member (6,12). A groove defined between the pulley members (6,8,12,14) has a width which is decreased and increased to thereby respectively increase and decrease the rotational radius of a belt (2A) which is received in the groove. A control arrangement executes speed change control to change the transmission ratio. The control arrangement includes a control unit (82) which receives throttle opening degree and vehicle velocity detection signals and determines first and second target engine rotational speeds which are based respectively on these detection signals. The control unit determines an optimum target engine rotational speed based on the first and second target engine rotational speeds and sets upper and lower limit values of the optimum target engine rotational speed in accordance with predetermined conditions. The control unit processes the optimum target engine rotational speed to obtain a final target engine rotational speed which is used to control the transmission.