Controller of power transmission system for vehicle
US10738883B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 13, 2019 |
| Grant date | Aug 11, 2020 |
| Priority date | — |
| Expiry date | Mar 13, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/1284
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A controller of a power transmission system for a vehicle includes an electronic control unit. When a difference between a secondary pressure set by use of a command pressure of the electromagnetic control valve for the secondary pulley, and an actual pressure obtained by a hydraulic pressure sensor, is larger than a predetermined pressure difference, the electronic control sets a primary pressure and the secondary pressure such that a speed ratio of a continuously variable transmission becomes substantially equal to a maximum value. The electronic control unit determines that there is an abnormality that an output pressure of the electromagnetic control valve for a secondary pulley is low, when the speed ratio is smaller than a predetermined first determination value, and determines that there is an abnormality in the hydraulic pressure sensor, when the speed ratio is larger than a predetermined second determination value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.