Control device for a continuously variable transmission
US6695742B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2001 |
| Grant date | Feb 24, 2004 |
| Priority date | — |
| Expiry date | Sep 26, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/66281
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A CVT has a torque convener (T/C) speed ratio calculation section that determines the speed ratio from the engine speed and the primary pulley speed. The calculation section then calculates the torque ratio from the speed ratio. An input torque estimation section then estimates the input torque input into CVT from the torque ratio and the determined engine output torque. The T/C speed ratio calculation section, having a correction amount calculation section, reduces the speed ratio when the accelerator pedal is depressed to less than Np/Ne. Because the disparity with real value of the speed ratio occurring in the dead time of the respective revolution sensors can be decreased and the input torque properly estimated, slippage between the V belt and the variable pulley is prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.