Idling control system for an automatic transmission providing anti roll back action
US4648289A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1985 |
| Grant date | Mar 10, 1987 |
| Priority date | — |
| Expiry date | Aug 26, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/207
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An automatic transmission has a gear transmission mechanism with a forward clutch which is engaged when the gear transmission mechanism is engaged to a forward speed stage, a one way clutch which is in cooperation with the forward clutch provides a first speed stage by rotation prevention, and a brake which, when engaged, in cooperation with the one way clutch prevents the power output shaft of the gear transmission mechanism from rotating in the direction to allow reverse motion of the vehicle. An idling control system for the transmission includes a first mechanism for engaging the forward clutch selectively either to a maximum amount or to an intermediate amount substantially lower than the maximum amount; a second mechanism for engaging the brake, when the forward clutch is thus engaged to the intermediate amount by the first mechanism; and a third mechanism for, when the automatic transmission is being operated in a forward driving mode, the vehicle is substantially stationary, and the engine is in substantially idling condition, actuating the first mechanism thus to engage the forward clutch to the intermediate amount and the second mechanism thus to engage the brake. Thereby…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.