Hydraulic control module for vehicle transmission and diagnostic detection method for the same
US8113988B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 5, 2008 |
| Grant date | Feb 14, 2012 |
| Priority date | — |
| Expiry date | Oct 17, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S477/906
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A detection scheme for diagnosing failure of clutch control components in a hydraulic control module of a power transmission utilizes pressure switch sensors to detect the position of each of the valves associated with the clutch control mechanization. The mechanization of these sensors with the valves provides the ability to clearly define the position of each of the valves, while also enabling the transmission electro-hydraulic control module (TEHCM) to diagnose the state of health of each pressure switch. The detection scheme may then differentiate between a failed switch and a failed (e.g., “stuck” or “out of position”) valve, while preventing unexpected and undesired shift sequencing within the transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.