Control system for automotive vehicle equipped with automatic transmission
US5520594A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 1995 |
| Grant date | May 28, 1996 |
| Priority date | — |
| Expiry date | Feb 6, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In order to prevent occurrence of engine stall even when a quick braking is made in a state where a torque converter of an automatic transmission is locked up, the torque converter is locked up in accordance with a throttle opening degree and a vehicle speed, and the lock-up is released at least when the braking operation is carried out. The opening degree B of an idle speed control valve (ISCV) for bypassing a throttle valve simultaneously with the lock-up is set, and the opening degree B is set as an actual control opening degree IV of ISCV when the opening degree B is larger than the opening degree IAV of ISCV which is set in accordance with the load of an engine. When the release of the lock-up is started, the actual control opening degree IV is gradually reduced to the opening degree IAV by a prescribed attenuation amount K. As a result, the engine stall due to a response delay to the release of the lock-up clutch can be prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.