Control of an automatic vehicle power transmission
US4899624A · kind A · utility
5Cited by
8References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1988 |
| Grant date | Feb 13, 1990 |
| Priority date | — |
| Expiry date | Apr 19, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/0488
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic control system for an automatic transmission including a pressure regulating valve responsive to a pilot pressure to produce a regulated line pressure which is applied through a switching valve to an actuator of a clutch. The switching valve is also responsive to the pilot pressure to allow the pilot pressure to be introduced to the actuator when the pilot pressure is below the predetermined value and passes the line pressure to the actuator when the pilot pressure is above the predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.