Regulation of hydraulic pressure in a system having multiple pressure sources
US5513732A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 5, 1994 |
| Grant date | May 7, 1996 |
| Priority date | — |
| Expiry date | Aug 5, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/0021
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A bypass pressure regulator valve, having first and second regulator ports connected to a sump and each port supplied from the output side of a first and second pump, regulates the magnitude of line pressure in response to a control pressure produced by a variable force solenoid. A high pump feed select valve alternately connects the output of the first pump and the sump to the inlet of the second pump. Output from the first pump is directed through a torque converter clutch pressure regulator valve and a converter charge pressure regulator valve to a first inlet of the torque converter causing the torque converter to open and to a second inlet causing the torque converter to close. Hydraulic fluid is directed to lubrication circuits and through a transmission oil cooler.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.