Shift control system for automatic transmissions
US5097725A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 5, 1991 |
| Grant date | Mar 24, 1992 |
| Priority date | — |
| Expiry date | Jul 5, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2059/186
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A shift control system for shifting an automatic transmission of a vehicle up or down by supplying an actuator of the transmission with a shift control signal provided according to a predetermined shift control schedule. The shift control system includes a retarder for delaying the shift control signal for a predetermined time when current vehicle speed is lower than a specified speed and a shift canceling arrangement for canceling the shift control signal when the vehicle slows down with a throttle valve near or in its idle position. The control system further includes a delay canceling arrangement for disabling the retarder so as not to delay the shift control signal when current vehicle speed is higher than the specified speed within the predetermined time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.