Method for controlling automatic transmission of a vehicle on a downhill slope
US7987034B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 18, 2003 |
| Grant date | Jul 26, 2011 |
| Priority date | — |
| Expiry date | Jun 18, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/0234
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention concerns a method for controlling automatic transmission (3) of a vehicle comprising an engine (2) driving the transmission (3) which consists in: detecting a downhill situation of the vehicle, and selecting a transmission ratio so that the engine absorbs energy, storing a longitudinal speed of downhill start (Vmin) when the vehicle starts going downhill, and while the vehicle is running downhill, comparing the current speed (V) of the vehicle with the downhill start speed (Vmin) such that the current speed (V) exceeds the downhill start speed (Vmin) by a predetermined difference (VS), then controlling the transmission to trigger downshifting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.