Method for controlling gear ratio changes in an automatic transmission
US8145398B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2008 |
| Grant date | Mar 27, 2012 |
| Priority date | — |
| Expiry date | Nov 1, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/0234
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method of controlling an automatic transmission of a machine includes a step of identifying an upcoming gear ratio change from a current gear ratio to a proposed gear ratio. An estimated power output value, based on the proposed gear ratio and a current engine speed, is determined. The estimated power output value is adjusted based on a derated operating condition. If the estimated power output value is greater than or equal to a current power output value, a gear evaluation identifier is set to a first value. If the estimated power output value is less than the current power output value, the gear evaluation identifier is set to a second value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.