Method for checking an electrohydraulic vehicle power brake system of an autonomously driving land vehicle for the presence of air in the brake fluid
US11975701B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2020 |
| Grant date | May 7, 2024 |
| Priority date | — |
| Expiry date | May 26, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T2270/413
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
To check an electrohydraulic power vehicle brake system of a passenger car traveling autonomously on public roads for air in the brake fluid, the method provides for a consecutive generation of a brake pressure using a first power brake-pressure generator and a redundant, second power brake-pressure generator. The brake pressure is intermittently lowered to ambient pressure. In the method, a comparison of the brake fluid volumes required for generating the brake pressure is provided. If the brake fluid volume required for generating the brake pressure using the second power brake-pressure generator is greater, then the presence of air in a brake fluid of the vehicle brake system is inferred.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.