Extension of operating range of feedback in CVT ratio control
US6839617B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2003 |
| Grant date | Jan 4, 2005 |
| Priority date | — |
| Expiry date | May 29, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/6648
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Operating range of feedback in CVT ratio control has been extended by use of stabilized values as an actual value of CVT ratio. The actual value of CVT ratio is derived from first and second pulse train signals provided by input and output speed sensors. Updating of rotational speed of the input member is repeated at intervals governed by the first pulse train. Updating of rotational speed of the output member is repeated at intervals governed by the second pulse train. Updating of an old value of a ratio between the latest value of the rotational speed of the input member and the latest value of the rotational speed of the output member to a new value thereof is repeated each time immediately after the rotational speeds of the input and output members have been updated since the latest updating of an old value of the ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.