BELT-TYPE CONTINUOUSLY VARIABLE TRANSMISSION CONTROL APPARATUS

摘要

PROBLEM TO BE SOLVED: To conduct control so that regularly required surplus pressure can be reduced to a minimum required amount.

SOLUTION: Surplus pressure (PMA) is obtained from a difference between a hydraulic pressure value detected by a hydraulic pressure sensor and a target supplied hydraulic pressure. A determination is made about whether a hydraulic pressure after the lapse of a prescribed time becomes equal to or lower than a minimum required hydraulic pressure based on a current surplus pressure (PMA) and the charging rate of the surplus pressure (PMA). When it is predicted that the hydraulic pressure is equal to or lower than the minimum required hydraulic pressure, correction is conducted to increase supplied hydraulic pressure.

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