Adaptive pressure control method for achieving synchronous upshifts in a multiple-ratio transmission
US6994647B2 · kind B2 · utility
13Cited by
11References
35Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 13, 2003 |
| Grant date | Feb 7, 2006 |
| Priority date | — |
| Expiry date | Mar 22, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/062
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An adaptive shift control method for a geared multiple ratio transmission having friction elements for clutches and brakes to establish and disestablish gear ratio changes wherein at least one ratio change involves engagement of one friction element in synchronism with disengagement of another friction element. Operating parameters are adapted throughout the life of the transmission to reduce synchronous errors by developing and learning pressure and time adjustments for the friction elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.