Method and transmission control apparatus for operating a multiple-speed vehicle transmission
US11773967B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 8, 2022 |
| Grant date | Oct 3, 2023 |
| Priority date | — |
| Expiry date | Sep 8, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/60
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method is disclosed for operating a multi-gear vehicle transmission in a motor vehicle during a coasting phase. The coasting phase includes an overrun phase with a driving gear engaged and a freewheeling phase with the neutral gear engaged. It is determined whether the motor vehicle is in the overrun phase of the coasting phase, whether a condition for a transition to the freewheeling phase of the coasting phase is fulfilled, and whether a transmission condition with elevated drag losses exists. If the motor vehicle is in the overrun phase of the coasting phase, if the condition for transition to the freewheeling phase is fulfilled, and if a transmission condition with elevated drag losses exists, then at least one further shifting element (D, E) is closed in addition to the shifting elements (A, B, C) of the driving gear, which are closed during the overrun phase of the motor vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.