Control device for continuously variable transmission
US10323744B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2015 |
| Grant date | Jun 18, 2019 |
| Priority date | — |
| Expiry date | Dec 16, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/66204
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Control device for continuously variable transmission (4) with auxiliary transmission having variator (20); hydraulic pressure control circuit (11) having primary pressure solenoid (11b); and transmission ratio controller (12) controlling the transmission ratio of variator (20) by feedback control. The transmission ratio controller (12) has a high limiter control unit (FIG. 5) that, when receiving a high transmission ratio limiting request, performs a high limiter control that limits the transmission ratio to a High limit line. The transmission ratio controller (12) also has a primary pressure lower limit regulation control unit (FIG. 4) that, when operation of the high limiter control is started during a time period when the transmission ratio is present at a High transmission ratio side with respect to the high limit transmission ratio, regulates a decrease of a primary command pressure to the primary pressure solenoid up to a High limiter-operated final target primary lower limit pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.