Method for electrohydraulically controlling a motor vehicle transmission and electrohydraulic controller for a motor vehicle transmission
US6588291B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 4, 2002 |
| Grant date | Jul 8, 2003 |
| Priority date | — |
| Expiry date | Feb 4, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19274
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control current is converted into an activation pressure for a transmission actuator by a pressure regulating valve. Both a control current at a given time and the activation pressure at the given time are fed back to a regulator. A setpoint value for the activation pressure in a partial range of a torque to be transmitted is converted by the regulator into the control current in dependence on the control current at the given time and otherwise as a function of the activation pressure at a given time. The current measuring device for determining the control current at the given time is adjusted here in such a way that a high resolution is obtained in the partial range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.