Electro-hydraulic brake valve performance monitoring
US8849535B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 30, 2012 |
| Grant date | Sep 30, 2014 |
| Priority date | — |
| Expiry date | Dec 15, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/686
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In a machine having an electro-hydraulic brake valve, issues in providing a desired brake pressure may be determined by comparing an actual brake output pressure of the brake valve to an acceptable brake pressure range for an output brake command current provided to the brake valve to generate the desired brake pressure. Where the actual brake output pressure is outside the acceptable brake pressure range, the brake pressure difference and time-rate-of-change of the brake pressure may be used to determine a weighted brake pressure difference that is accumulated over a series of sample cycles and compared to an integration limit to determine whether the operator should be warned of the brake pressure difference. The integration limit may be based on a factor indicative of the responsiveness of the machine, such as the oil temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.