Shift control apparatus of belt type continuously variable transmission
US7387589B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2006 |
| Grant date | Jun 17, 2008 |
| Priority date | — |
| Expiry date | Dec 13, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/66254
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A shift control apparatus of a belt type continuously variable transmission is comprised of a controller which is arranged to set a first hydraulic pressure controlled variable based on a first target transmission ratio determined based on a vehicle traveling condition, to set a second hydraulic controlled variable based on a second target transmission ratio determined based on a predetermined transfer characteristic, to steplessly control the transmission ratio by controlling hydraulic pressures of primary and secondary pulleys hydraulic based on the first and second hydraulic pressure controlled variables, to detect at least one of the hydraulic pressures of the primary and secondary pulleys, and to correct the second target transmission ratio based on the detected hydraulic pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.