Control device for automatic transmission
US8374756B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2010 |
| Grant date | Feb 12, 2013 |
| Priority date | — |
| Expiry date | Oct 14, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/0241
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control device for an automatic transmission includes a speed change controller configured to generate a speed change instruction. A temperature calculator is configured to calculate a temperature of at least one frictional engagement element among frictional engagement elements. A rotation difference calculator is configured to calculate a rotation difference between an input and an output of the at least one frictional engagement element. A determining unit is configured to determine whether the frictional engagement element is engageable or non-engageable based on the temperature and the rotation difference of the frictional engagement element and a pattern of the speed change instruction. The delay unit is configured to delay engagement until the determining unit determines that the frictional engagement element is engageable, if the determining unit determines that the frictional engagement element is non-engageable when the speed change controller generates the speed change instruction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.