Control system for automatic transmissions
US5505673A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 1994 |
| Grant date | Apr 9, 1996 |
| Priority date | — |
| Expiry date | Sep 27, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/08
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control system for an automatic transmission, includes a first hydraulic servo adapted to be fed with oil for effecting a shift to a target gear stage; a second hydraulic servo adapted to be fed with the oil for effecting a shift to the target gear stage; a limit oil feed circuit formed through an oil limit flow limiting device; a quick oil feed circuit bypassing the oil flow limiting device; and an oil passage switch for switching and connecting the limit oil feed circuit and the quick oil feed circuit to the first hydraulic servo and the second hydraulic servo. The oil passage switch feeds oil from the quick oil feed circuit to the first hydraulic servo and the second hydraulic servo, when the engine load is high, and feeds oil from the limit oil feed circuit to at least the first hydraulic servo when the engine load is low.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.