Fuel pump with electronic controlled pressure regulation and failure mitigation
US11920536B1 · kind B1 · utility
Inventors
Key dates
| Filing date | May 17, 2022 |
| Grant date | Mar 5, 2024 |
| Priority date | — |
| Expiry date | May 17, 2042 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/50
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel pump system for aircraft includes an auxiliary fuel pump in-line with the primary pump, and an electric motor driving the auxiliary fuel pump at an operational motor speed. The system includes an electric control circuit (ECC) and a pressure sensor to regulate the speed of the electric motor based on the output pressure from the sensor to maintain a constant predetermined output pressure. The system may have additional fault mitigation circuitry configured to automatically switch from a processor-controlled to a fixed voltage as a source of power driving the electric motor at either a regulated speed or a constant fixed speed, respectively. The system may include a switch having user-selectable operational modes, including ECC-controlled mode and a high boost mode selectable if the ECC fails. In high boost mode, the ECC is bypassed to drive the electric motor at a fixed safe speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.