Process and apparatus for regulating pressure application of setting mechanisms of transmission elements of vehicular transmission systems
US5103954A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1989 |
| Grant date | Apr 14, 1992 |
| Priority date | — |
| Expiry date | Mar 24, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H59/46
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A process is described for application of pressure on setting mechanisms of transmission elements, e.g., band brakes or disk clutches, of an automatic transmission, particularly of the transmission system of a vehicle. In the process the control pressure applied to the setting mechanism is varied in dependence on the operating conditions. In order to eliminate transition errors and improve adaptation of the meshing behavior of the switching element, the slide of the switching element is regulated at a value adapted to the operating condition involved of the transmission and/or the vehicle. Apparatus for the implementation of the process is also described, as well as a hydraulic control system for supplying the operational chamber of a setting mechanism at a transmission element, which operational chamber has a continual leakage. In this regard, a valve device, by which the operational chamber can be rapidly filed by activation of the setting mechanism, is installed parallel to a rapid-response control valve, with which the pressure force of the transmission element parts can be influenced in a targeted manner. In this manner, it is possible for driver to feel a spontaneous reaction…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.