Hydraulic pressure control system for torque converter
US8813927B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 27, 2012 |
| Grant date | Aug 26, 2014 |
| Priority date | — |
| Expiry date | Oct 4, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7793
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic pressure control system for a torque converter includes a lock-up clutch operated according to pressure difference between an engagement and disengagement side oil chambers, a first hydraulic line communicated with the disengagement side oil chamber, second and third hydraulic lines communicated with the engagement side oil chamber, and a lock-up switch valve and a torque converter hydraulic pressure control valve that generate pressure difference between the second and the third hydraulic line communicated so that fluid within the engagement side oil chamber is circulated in lock-up on state of the lock-up clutch, and the lock-up switch valve and the torque converter hydraulic pressure control valve generate pressure difference between the second and the third hydraulic line in slip state of the lock-up clutch higher than the pressure difference between the second and the third hydraulic line in the lock-up on state of the lock-up clutch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.