公开(公告)号：US11927164B2

公开(公告)日：2024-03-12

申请号：US17988946

申请日：2022-11-17

Applicant: Walbro LLC

Inventor： Gary J. Burns ,  Andreas D. M. Dixon ,  Eric G. Zbytowski ,  Albert L Sayers ,  Justin T. Dolane ,  David L Speirs ,  William E. Galka ,  Duried F. Rabban ,  Bradley J. Roche

IPC: F02M69/04 ,  F02D9/10 ,  F02M7/18 ,  F02M19/02 ,  F02M19/08 ,  F02M19/10 ,  F02M63/00

CPC classification number: F02M69/044 ,  F02D9/10 ,  F02M7/18 ,  F02M19/0207 ,  F02M19/08 ,  F02M19/10 ,  F02M63/0056

Abstract: A throttle body assembly for a combustion engine includes a throttle body having a pressure chamber including a supply of liquid fuel, and a throttle bore with an inlet through which air is received. A throttle valve is carried by the throttle body with a valve head movable relative to the throttle bore. A metering valve is coupled to the throttle body, and has a valve element that is movable between open and closed positions. A boost venturi is located in the throttle bore and has an inner passage that is open at both ends to the throttle bore. The boost venturi has an opening through which fuel flows into the inner passage when the valve element is in the open position, wherein fuel flows from the pressure chamber to the metering valve under the force of gravity or under a pressure of less than 6 psi.