Lockup control device for transmission
US6537178B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2000 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | Nov 30, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H59/72
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
After an engine (1) has started, a controller (6) starts determining whether lockup should be prohibited or permitted based on the cooling water temperature of an engine (1) or the oil temperature of a transmission (2). Once it has been determined that lockup should be permitted, the controller (6) stops determining whether lockup should be prohibited or permitted until the next time the engine (1) is started. In this way, once the conditions for determining that lockup should be permitted hold, lockup prohibition or permission based on the engine cooling water temperature or transmission oil temperature is no longer determined, so repeat engaging and disengaging of the lockup clutch (5) due to fluctuations of engine cooling water temperature or transmission oil temperature, is prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.