Electric shift apparatus
US4841793A · kind A · utility
Inventors
Key dates
| Filing date | Sep 14, 1987 |
| Grant date | Jun 27, 1989 |
| Priority date | — |
| Expiry date | Sep 14, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/1926
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An electric shift apparatus for use with a motor vehicle having an automatic transmission. The apparatus includes a power module adapted to be mounted on the housing of the transmission proximate the transmission mode select shaft and a control module adapted to be mounted in the passenger compartment of the vehicle. The power module includes an electric motor driving a speed reduction unit and the lower exposed end of the output shaft of the reduction unit is adapted to be drivingly coupled to the exposed upper end of the mode select shaft of the automatic transmission. The control module includes a plurality of push button members corresponding respectively to the transmission shift positions. An encoder wheel positioned in the housing of the speed reduction unit provides a constant coded signal indicating the instantaneous position of the transmission mode select shaft and this coded signal is compared by comparator means in the logic of the control unit with the selected shift position. The comparator means generates a signal to the motor assembly to move the mode select shaft in a direction to achieve the selected shift position and stops the motor assembly when the encoder si…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.