| 摘要 |
PROBLEM TO BE SOLVED: To avoid the wire breakage and a belt slide of an input rotation sensor of a belt-type continuously variable transmission which is connected to a power plant via a clutch.SOLUTION: An instantaneous rotation speed Nm of an input shaft is calculated from an input cycle of a pulse signal from a rotation sensor, a rotation speed Nf is calculated by filter-processing the instantaneous rotation speed Nm, it is determined that a belt slip occurs when a state that the rotation speed Nf is not lower than a slip determination speed Nfor a slip determination time Tor longer when a vehicle is stopped, and the proximate rotation speed Nf is maintained until a time of the non-input of a pulse signal exceeds a wheel lock corresponding time Twhich is longer than the slip determination time T. When the instantaneous rotation speed Nm is in a zone between a first reference speed Nand a second reference speed Nwithin a reference time Tafter the signal non-input is brought into an input state, the instantaneous rotation speed is instantaneously set to zero by the generation of the non-input of the pulse signal, and when the instantaneous rotation speed Nm is in a zone of the second reference speed Nor longer, a value of the proximate rotation speed Nf is maintained. |
