Shift control device of vehicular automatic transmission
US7740559B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2006 |
| Grant date | Jun 22, 2010 |
| Priority date | — |
| Expiry date | Sep 4, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2306/54
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A shift control device of a vehicular automatic transmission, if during a first shift in a power-off state, a second shift judgment for a second shift that is a power-on downshift is made, performs a second shift control of lowering an input shaft rotation speed to a synchronous rotation speed of a post-second shift gear step through an engagement control of the friction engagement devices, and when the second shift is performed, performs a control of reducing a throttle valve opening degree of the engine to a predetermined degree that causes the engine to output a torque that is able to bring the input shaft rotation speed to a rotation speed that is higher than the synchronous rotation speed of the post-second shift gear step. The control device also executes a retardation control of retarding an ignition timing of the engine when the input shaft rotation speed is dropped through the second shift control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.