Lateral pressure control apparatus for a continuously variable transmission and torque ratio estimation device for a continuously variable transmission

摘要

Transfer characteristic fluctuation component of any input shaft element has, the torque ratio is the ratio of the actual transfer torque to the maximum transmittable torque of the continuously variable transmission and (Tr) is transmitted to the output shaft element via a friction element phase delay at the time of estimating on the basis of, and the index of the phase difference of the fluctuation component of the two elements sliding identifier with an index of the amplitude difference of the fluctuation component of the two components or (IDslip), from (Δφ) torque ratio ( It can therefore estimate the Tr), and to improve the power transmission efficiency by accurately estimate (Tr) torque ratio which very closely related to the power transfer efficiency of the continuously variable transmission. Moreover, it is possible since the estimated phase lag slip or identifier (IDslip) from (Δφ) torque ratio (Tr), to achieve a reduction in costs by minimizing the number of sensors necessary to estimate it.