Speed controller and control methods of continuously variable transmission
US6174261A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1999 |
| Grant date | Jan 16, 2001 |
| Priority date | — |
| Expiry date | Jun 11, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/66254
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A first final target input rotation speed is calculated according to a throttle opening and a vehicle speed, and a second final target input rotation speed is calculated by applying an upper limit to the first final target input rotation speed. The upper limit is determined so as to reduce noise outside the vehicle. A second final target speed ratio is set from the vehicle speed and second final target input rotation speed, and a time constant of a speed ratio variation is determined from the vehicle speed and first final target input rotation speed. By transiently controlling the speed ratio variation using the second final target speed ratio and time constant thus obtained, an excessive increase of engine rotation speed is prevented while retaining a desirable feeling of acceleration when there is a kickdown operation of the vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.