Lock-up disengagement control device for automatic transmission
US11460103B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 17, 2019 |
| Grant date | Oct 4, 2022 |
| Priority date | — |
| Expiry date | Jun 13, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/147
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A lockup disengagement control device for an automatic transmission including a torque converter including a lockup clutch, and a lockup control section, the lockup disengagement control device includes: when a brake is operated from a brake OFF to a brake ON during a coast traveling in an engagement state of the lockup clutch, the lockup control section being configured to sense an initial deceleration by the brake ON operation, and to set a lockup release vehicle speed to be higher as an absolute value of the initial deceleration is greater, and when a vehicle speed is sensed to be equal to or smaller than the set lockup release vehicle speed in a middle of a brake deceleration scene by the brake ON operation, the lockup control section being configured to disengage the lockup clutch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.