Invention Application
- Patent Title: VARIABLE DISPLACEMENT METERING SYSTEM WITH MODE SELECTION
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Application No.: US17324009Application Date: 2021-05-18
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Publication No.: US20220372941A1Publication Date: 2022-11-24
- Inventor: Ryan Susca , Morgan O'Rorke , Matej Rutar , Todd Haugsjaahabink , Weishun William Ni , Benjamin T. Harder , Ryan Shook
- Applicant: Hamilton Sundstrand Corporation
- Applicant Address: US NC Charlotte
- Assignee: Hamilton Sundstrand Corporation
- Current Assignee: Hamilton Sundstrand Corporation
- Current Assignee Address: US NC Charlotte
- Main IPC: F02M37/04
- IPC: F02M37/04 ; F15B13/04 ; F15B5/00

Abstract:
A fuel metering system includes a pump with an inlet and an outlet, a first flow path including a first valve fluidically connected to the outlet of the pump, and a second flow path including a second valve fluidically connected to the outlet of the pump, a third valve, and a fourth valve. An electrohydraulic servo valve in a first position hydraulically connects the inlet of the pump to the first, third, and fourth valves to close the first valve, open the third valve, open a first window of the fourth valve, and close a second window of the fourth valve. The electrohydraulic servo valve in a second position hydraulically connects the outlet of the pump to the first, third, and fourth valves to open the first valve, close the third valve, close the first window of the fourth valve, and open the second window of the fourth valve.
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