Procedure for operating a transmission device, particularly a 9-speed-transmission
US9404569B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 2014 |
| Grant date | Aug 2, 2016 |
| Priority date | — |
| Expiry date | Jun 12, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/2094
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method for operating a 9-speed transmission which changes operating states by actuating shift elements. At least one of the shift elements is a form-locking shift element, which disengages to implement a defined transmission operating state during which the power flow, between transmission input and output shafts, is present or interrupted. A sensor is associated with the locking shift element. An operating state of the locking shift element can be determined by the sensor. Upon a request to disengage the locking shift element, a disengagement control signal is generated and the locking shift element is actuated in the disengagement direction, depending on the disengagement control signal. The transmission is shifted to a safe operating state, in which at least the transmission output shaft can rotate, when an engaged operating state of the locking shift element is determined by the sensor even though a disengagement control signal was generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.