Control apparatus for automatic transmission
US9709165B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2015 |
| Grant date | Jul 18, 2017 |
| Priority date | — |
| Expiry date | Dec 10, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/1224
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In an apparatus for controlling an automatic transmission connected to a prime mover mounted on a vehicle, having a torque converter equipped with a lock-up clutch, when the automatic transmission is gear-shifted to a predetermined gear at deceleration of the vehicle and it is determined that predetermined operating conditions of the vehicle are satisfied, a lock-up clutch engaging circuit is formed through a hydraulic supply circuit. Next it is determined whether engage-position sticking malfunction of the lock-up clutch has occurred based on a ratio of an input rotational speed of the automatic transmission relative to an output rotational speed of the prime mover when the lock-up clutch engaging circuit has been formed, and fail-safe control is then implement when the sticking is determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.