发明名称 |
HYDRAULIC CONTROL SYSTEM OF CONTINUOUSLY VARIABLE TRANSMISSION |
摘要 |
A hydraulic control system of continuously variable transmission includes: a first sheave pressure regulating valve (17) that regulates a line pressure (Pl), which is used for hydraulic control as a source pressure, to obtain a first sheave pressure (Pin); a fail-safe valve (19) that selects and outputs any one of the first sheave pressure (Pin) or a fail-safe hydraulic pressure (second sheave pressure Pout) that is applied to a drive pulley (21) at the time of a failure due to an excessive first sheave pressure (Pin) to the drive pulley (21); and an orifice (25) that is provided in an oil passage (24) between the fail-safe valve (19) and the drive pulley (21). Then, a hydraulic pressure in the oil passage (24) on the drive pulley (21) side of the orifice (25) is supplied to the first sheave pressure regulating valve (17) as a feedback pressure. |
申请公布号 |
EP2238371(A1) |
申请公布日期 |
2010.10.13 |
申请号 |
EP20080869489 |
申请日期 |
2008.12.23 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
OGATA, YUSUKE;AOYAMA, TOSHIHIRO |
分类号 |
F16H61/12;F16H9/00;F16H59/68;F16H61/00;F16H61/66;F16H61/662 |
主分类号 |
F16H61/12 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|