Hydraulic supply system for a hydraulically actuated automatic transmission
US8353805B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2008 |
| Grant date | Jan 15, 2013 |
| Priority date | — |
| Expiry date | Jul 2, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/66286
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic supply system for a hydraulically actuated automatic transmission, in particular for a belt-driven conical-pulley transmission. The system includes a primary pump driven by a primary drive system to provide pressure in a supply line connected to a regulating valve. The supply line is connected through a pilot valve to a control line in which a control valve is situated, with which the pressure that determines the setting of a transmission ratio adjusting valve is set. An auxiliary pump driven by an auxiliary drive system that is separate from the primary drive system includes an outlet line connected to the control line through a first valve that opens in the direction of the control line, and is connected to the supply line through a second valve that opens in the direction of the supply line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.