Manual operation control of automatic transmission
US6442466B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2000 |
| Grant date | Aug 27, 2002 |
| Priority date | — |
| Expiry date | Oct 18, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2059/0243
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A first switch (2) which can select a manual mode, and a second switch (5, 6) which can select one of an upshift and a downshift, are provided. A microprocessor (1) varies a speed ratio of an automatic transmission (10) according to the specification of the second switch (5, 6) when the first switch (2) has previously selected the manual mode, and the second switch (5, 6) subsequently specifies one of the upshift and the downshift (S20, S21, S33, S40, S41, S34, S36, S37, S53, S54, S55). On the other hand, variation of the speed ratio of the automatic transmission (10) according to the specification of the second switch (5, 6) is prohibited when the second switch (5,6) specifies one of the upshift and the downshift at a timing not later than a timing at which the manual mode is selected by the first switch (2) (S20, S22, S33, S40, S38, S34, S36, S38, S53, S54, S56). Due to this processing, an unexpected speed ratio variation is prevented from occurring simultaneously when the first switch (2) selects the manual mode in the state where the second switch (5.6) has been fixed in the ON state due to malfunction or misoperation of the second switch (5, 6).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.