Hydraulic accumulator health diagnosis
US9366269B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2012 |
| Grant date | Jun 14, 2016 |
| Priority date | — |
| Expiry date | Nov 19, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2201/51
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A system to diagnose a health of a hydraulic accumulator is provided. The hydraulic accumulator includes a first fluid chamber, a second fluid chamber, and a separator. The hydraulic accumulator has an associated pre-charge pressure. The system further includes a pressure sensor, a fluid source, a data processor, and a comparator. The pressure sensor and the fluid source are connected to the first fluid chamber. The data processor is configured to determine a first and second rate of pressure changes, and a transition pressure between the first and second rates. The approximate pre-charge pressure is determined based on the transition pressure. The comparator is configured to compare at least one of the determined pre charge pressure and the frictional forces with a pre-determined threshold range of pre-charge pressure and the frictional forces associated with the hydraulic accumulator to diagnose the health of the hydraulic accumulator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.