Brake device
US6805415B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 2001 |
| Grant date | Oct 19, 2004 |
| Priority date | — |
| Expiry date | Feb 8, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T17/22
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
When the increasing gradient of the operating power is larger than a predetermined gradient, if a master pressure PM2 corresponding to a second predetermined operating power F2 is larger than a second predetermined fluid pressure Pth2, a servo function failure in the brake operation is determined; if it is smaller than the second predetermined fluid pressure Pth2, fluid leakage failure (S23, S26, S27) is determined. Furthermore, if the master pressure PM0 corresponding to the first predetermined operating power F0 is larger than a first predetermined fluid pressure Pth1, small amount fluid leakage failure is determined; if it is smaller than the first predetermined fluid pressure Pth1, large amount fluid leakage failure (S28, S29, S30) is determined. On the other hand, when the increasing gradient of the operating power is smaller than a predetermined gradient, if the master pressure PM0 is smaller than the first predetermined fluid pressure Pth1, servo function failure is determined; if it is larger than the first predetermined fluid pressure Pth1, the normal condition (S32, S33) is determined. Therefore, the type of the failure can be detected based on both the operating power an…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.