| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hydraulic controller capable of preventing the occurrence of a rapid deceleration condition, in a belt-type continuously variable transmission without having to add a new solenoid valve to it. <P>SOLUTION: This hydraulic controller is provided with a fail-safe valve 305 capable of switching oil pressure to be supplied into a primary pulley 41 between output oil pressure of a speed change oil pressure control valve 301 and line pressure PL. The fail-safe valve 305 is switched to a fail position for supplying line pressure PL into the primary pulley 41, if there is a possibility that the rapid decelerating condition occurs in the belt-type continuously variable transmission and otherwise, is switched to a normal position for supplying output oil pressure of the speed change oil pressure control valve 301 into the primary pulley 41. The switching of the fail-safe valve 305 is controlled by the control oil pressure PSLS of a linear solenoid (SLS) 202 and the control oil pressure PDSU of a duty solenoid (DSU) 203. <P>COPYRIGHT: (C)2010,JPO&INPIT |
