Hydraulic pressure sensor failure control system for belt-type continuously variable transmission
US7192372B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 25, 2003 |
| Grant date | Mar 20, 2007 |
| Priority date | — |
| Expiry date | Aug 16, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/122
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In case a primary hydraulic pressure sensor is normal, when reverse rotation of pulleys is detected a primary pulley (Plpri) torque capacity is calculated from a primary pressure detected by the primary hydraulic pressure sensor. When the primary hydraulic pressure sensor fails, a secondary hydraulic pressure sensor is checked, and when the secondary hydraulic pressure sensor is normal, the PLpri torque capacity is determined from a secondary pressure detected by the secondary hydraulic pressure sensor by using a map. On the other hand, when the secondary hydraulic pressure sensor fails too, the PLpri torque capacity is read out from the map by using a secondary pressure target value as the secondary pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.