Apparatus and method for using transmission output torque data to control gear change
US8224538B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 11, 2009 |
| Grant date | Jul 17, 2012 |
| Priority date | — |
| Expiry date | Oct 10, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2059/148
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An automatic transmission includes gears, torque-transmitting mechanisms, interconnecting members, an input member and an output member. A method of controlling the automatic transmission includes data acquisition from the output shaft torque sensor, commanding a hydraulic fluid pressure pulse time and a pressure pulse value to engage a first torque-transmitting mechanism, calculating a rate-of-change of a first data output from the output shaft torque sensor, calculating a rate-of-change of a second data output from the output shaft torque sensor, comparing the results of the rate-of-change calculations and adjusting the hydraulic fluid pressure pulse time and a pressure pulse value if the rate of change of the second data output is not equal to the rate-of-change of the first data output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.