发明名称 |
Hydraulic control system for vehicular power transmitting mechanism |
摘要 |
A hydraulic control system for a vehicular drive system including a hydraulically operated belt-and-pulley type continuously variable transmission and a hydraulically operated frictional coupling device engaged for running of a vehicle, the hydraulic control system including: a first solenoid valve for regulating a belt-tensioning hydraulic pressure for tensioning a belt of the transmission, a second solenoid valve for regulating a transient coupling hydraulic pressure to be applied to the frictional coupling device in the process of an engaging action, a line-pressure regulating valve for regulating a line pressure used for hydraulically operated devices of the mechanism, and a hydraulic-circuit switching device operable to apply a control pressure of the second solenoid-operated valve to the line-pressure regulating valve after the frictional coupling device has been placed in a fully engaged state, and to apply a first control pressure of the first solenoid-operated valve to the line-pressure regulating valve while the frictional coupling device is in the process of the engaging action. |
申请公布号 |
US8066595(B2) |
申请公布日期 |
2011.11.29 |
申请号 |
US20050258873 |
申请日期 |
2005.10.27 |
申请人 |
OGATA YUSUKE;SOGA YOSHINOBU;HABUCHI RYOJI;TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
OGATA YUSUKE;SOGA YOSHINOBU;HABUCHI RYOJI |
分类号 |
F16H59/00;F16H7/08;F16H7/22;F16H61/00;F16H61/26;F16H61/662;F16H63/00 |
主分类号 |
F16H59/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|