| 摘要 |
An abnormality detection device for a continuously variable transmission, wherein an abnormality determination means (U) that determines whether a metal ring of a metal belt (15) of a continuously variable transmission (TM) is broken calculates the compression stiffness (k) of the metal belt (15) from the amplitude ratio (m) of the variation component of the rotational speed of an input shaft (11) and the variation component of the rotational speed of an output shaft (12), from a phase delay (φp.DN) that is obtained by indexing the phase difference between the variation component of the rotational speed of the input shaft (11) and the variation component of the rotational speed of the output shaft (12), and from the belt pitch radius (RDR, RDN) of a drive pulley (13) or of a driven pulley (14), compares the compression stiffness (k) of the metal belt (15) with a preset reference compression stiffness so as to determine whether the metal ring is broken, and can thereby quickly and certainly determine whether the metal ring is broken without the need for a special sensor. |
