Automatic speed changer controller, automatic speed changer control method, and recording medium having program for method recorded thereon

Abstract

It is an object of the present invention to provide an automatic transmission control apparatus in which the durability of a continuously variable transmission (10) can be improved and the torque transmission efficiency can be increased, an automatic transmission control method and a recording medium with its program recorded. The invention comprises a primary pulley (126), a secondary pulley (131), a belt (132) stretched between the primary pulley (126) and the secondary pulley (131), pinching pressure generation means for generating a pinching pressure for the belt (132), travel environment detection means (91) for detecting the travel environment of a vehicle, torque variation estimation processing means (92) for estimating the transmission torque variation during travel, and pinching pressure change processing means (93) for changing the pinching pressure based on the estimated results. The pinching pressure is prevented from constantly increasing, since the transmission torque variation during travel is estimated, and the pinching pressure for the belt (132) is changed based on the estimated results. Accordingly, the torque transmission efficiency can be increased, and the fuel efficiency can thus be improved.

Dependencies are inferred from the claim text.