Multistage automatic shift control apparatus
US4727772A · kind A · utility
13Cited by
19References
7Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Mar 31, 1986 |
| Grant date | Mar 1, 1988 |
| Priority date | — |
| Expiry date | Mar 31, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H63/44
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A rotational speed detecting device for detecting the rotational speed of a predetermined element of a shifting unit is provided for at least one of a main shifting unit and a sub-shifting unit. A control is provided for controlling a predetermined friction engaging element of at least one of the shifting units according to signals from the rotational speed detecting device, so that shifting operations of both the shifting units will be synchronized when both the units are shifted. Therefore, the output of speed of the transmission is not temporarily increased or decreased and thus, smooth shifting is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.