INPUT ROTATION SPEED PREDICTING DEVICE FOR CONTINUOUSLY VARIABLE TRANSMISSION, INPUT INERTIAL TORQUE CALCULATING DEVICE THEREFOR, CONTROL DEVICE THEREFOR EQUIPPED WITH ANY ONE OF THEM, INPUT ROTATION SPEED PREDICTING METHOD THEREFOR, AND INPUT INERTIAL TORQUE THEREFOR

摘要

PPROBLEM TO BE SOLVED: To inhibit the slip of the V belt of a continuously variable transmission and to improve fuel efficiency. PSOLUTION: A hydraulic oil flow quantity QSBmodel/SB(n) flowing in a primary oil chamber 30c is calculated with a physical model (S105). The prediction value of a speed change ratio SBmodel/SB(n+T) after a prescribed time T is calculated with the flow quantity QSBmodel/SB(n), and the rotation speed prediction value NINSBmodel/SB(n+T) of an input shaft 26 after the prescribed time T is calculated (S106-S108). Then, input inertial torque TRQI(n) is calculated with the prediction value NINSBmodel/SB(n+T), and belt pinch pressure PSBout/SB(n) is increased in consideration of the torque TRQI(n) (S109-S111). PCOPYRIGHT: (C)2003,JPO