| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an air inflow prevention device of a belt continuously variable transmission which can prevent air from flowing into a pulley oil chamber to prevent a belt from slipping. <P>SOLUTION: This air inflow prevention device of a belt continuously variable transmission includes an air introduction passage 92 and a check valve 94. One end of the air introduction passage is connected to a supply/discharge oil path 41 for supplying/discharging hydraulic oil to/from the pulley oil chamber 13 and the other end comprises a vent hole 93 at a position higher than the top part of the pulley oil chamber 13. The check valve is installed in the air introduction passage at the position higher than the top part of the pulley oil chamber 13, and prohibits the outflow of the hydraulic oil when the hydraulic oil is supplied to the air introduction passage and allows the inflow of air through the vent hole 93 when the hydraulic oil in the air introduction passage is drained. Since the check valve 94 is opened first and the air flows into the air introduction passage 92 when the hydraulic pressure in the pulley oil chamber 13 is discharged, the inflow of the air into the pulley oil chamber 13 can be retarded. <P>COPYRIGHT: (C)2012,JPO&INPIT |
