Hydraulic accumulator pre-charge pressure detection for hydraulic braking system
US9358966B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2014 |
| Grant date | Jun 7, 2016 |
| Priority date | — |
| Expiry date | Dec 11, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T17/04
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A system and method for detecting a pre-charge pressure of a hydraulic braking system are disclosed. A controller receives pressure readings from a pressure sensor indicative of the pressure of a hydraulic brake accumulator or the lower pressure of more than one accumulator. In response to fluid being provided to the hydraulic accumulator, the controller determines a first rate of pressure change, a second rate of pressure change different than the first rate, and a transition pressure between the first and second rates. The controller determines an approximate pre-charge pressure of the hydraulic brake accumulator based on the transition pressure. A warning can be provided to the operator or another when the determined pre-charge pressure is lower than a reference pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.