Method of and system for deciding failures of automatic transmission
US6125316A · kind A · utility
12Cited by
17References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 13, 1996 |
| Grant date | Sep 26, 2000 |
| Priority date | — |
| Expiry date | May 13, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/1276
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A gear shift failure of an automatic transmission to a wrong gear other than an indented gear is made by estimating slippage theoretically caused in a torque converter on the basis of an engine speed and a turbine speed theoretically determined for an intended gear according to the vehicle speed and comparing the estimating slippage with predetermined reference slippage. When the estimated slippage exceeds the predetermined threshold slippage, it is decided that there has occurred a wrong shift to a gear other than the intended gear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.