System for determining an abnormal operating condition in speed ratios of an automatic transmission and a method therefor
US5598334A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1994 |
| Grant date | Jan 28, 1997 |
| Priority date | — |
| Expiry date | Dec 30, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19153
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present invention discloses a system and a method for easily determining an abnormal operating condition in speed ratios of an automatic transmission by checking a speed ratio that does not perform normally and the condition of the system connected to the speed ratio, if the automatic transmission does not operate normally. The inventive system for determining an abnormal operating condition in speed ratios of an automatic transmission of an automotive vehicle includes a shift lever position sensing member, a turbine rotating frequency sensing member, an output shaft rotating frequency determination, a transmission oil temperature sensing device, a shift controlling member, and a data storing and information display device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.