公开(公告)号：US11920536B1

公开(公告)日：2024-03-05

申请号：US17746709

申请日：2022-05-17

申请人： Gary Schultz ,  Conrad P. Lindberg ,  Charles Duffie

发明人： Gary Schultz ,  Conrad P. Lindberg ,  Charles Duffie

IPC分类号： F02D41/22 ,  F02D41/30 ,  F02C7/236 ,  F02C9/30

CPC分类号： F02D41/222 ,  F02D41/221 ,  F02D41/3082 ,  F02C7/236 ,  F02C9/30 ,  F02D2041/223 ,  F02D2041/226 ,  F02D2041/228 ,  F02D2200/0602 ,  F02D2200/50

摘要： 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.