Shift control apparatus for step-variable automatic transmission
US7337051B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2004 |
| Grant date | Feb 26, 2008 |
| Priority date | — |
| Expiry date | Jan 23, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/20067
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A shift control apparatus for controlling shifting actions of a step-variable automatic transmission having a plurality of selectable groups of forward-drive positions (e.g., normal-spread group and narrow-spread or wide-spread group) having respective different sets of speed ratios, the automatic transmission having an automatic shifting mode in which the shifting actions take place automatically and a manual shifting mode in which the shifting actions are manually controllable, the shift control apparatus including a drive-position-group selecting portion operable upon switching of a shifting mode of the automatic transmission from the automatic shifting mode to the manual shifting mode, to select one of the selectable groups of forward-drive positions in the manual shifting mode, on the basis of the group which was selected last in the automatic shifting mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.