초록 ▼

A fuel control system is provided in a single compact modular unit. The unit includes a motor driving a highly accurate cam-operated double-acting piston metering pump, both of which are contained in a liquid fuel environment. As the liquid fuel is pumped it works to cool internal components includi

A fuel control system is provided in a single compact modular unit. The unit includes a motor driving a highly accurate cam-operated double-acting piston metering pump, both of which are contained in a liquid fuel environment. As the liquid fuel is pumped it works to cool internal components including the motor. An electronic motor drive is contained in a dry chamber of the unit for controlling operation of the motor and pump and is cooled indirectly by the fuel as well. A pressure sensitive flow divider is also included for selectively providing one or multiple output fuel flow paths depending upon whether a pressure threshold is reached, for example to send fuel to primary and secondary burner nozzles. Filter, filter bypass, pressure relief, and fuel shut-off components are also integrated into the single modular unit.

대표청구항 ▼

What is claimed is: 1. A fuel control module for controlling the flow of fuel from a fuel supply to a fuel consuming device having at least two consumption components, the fuel control module comprising a housing having an inlet and an outlet, including a first outlet port in communication with a f

What is claimed is: 1. A fuel control module for controlling the flow of fuel from a fuel supply to a fuel consuming device having at least two consumption components, the fuel control module comprising a housing having an inlet and an outlet, including a first outlet port in communication with a first of the consumption components and a second outlet port in communication with a second of the consumption components, and containing a drive section, a pump section and a flow divider section, the drive section including a motor and an electronic motor drive, the pump section having an operating member moved by the motor in response to a signal from the motor drive to effect flow of fuel between the inlet and the outlet of the housing, the flow divider section having first and second passageways in communication with the respective first and second outlet ports and having a valve controlling fuel flow through the first passageway such that when the valve is closed fuel is directed only to the second outlet port for delivery to the second consumption component and when the valve is open fuel is directed to both the first and second outlet ports for delivery to the respective first and second consumption components, wherein the housing includes a filter section having a filter element disposed in communication with the inlet of the housing and the pump section and a filter bypass valve which opens to allow fuel flow from the inlet to the pump section without passing through the filter element, wherein the filter bypass valve is asymmetric having an enlarged downstream end such that it is pressure activated to open when sufficient pressure acts on the enlarged end. 2. The module of claim 1, wherein the flow divider valve is pressure operated to provide the at least two outlet flow paths when at a pressure higher than a threshold pressure. 3. The module of claim 2, wherein the fuel consuming device is a turbine engine and the first and second consumption components are respective primary and secondary nozzles of the turbine engine. 4. The module of claim 1, further including a pressure sensor sensing pressure downstream from the filter and electrically coupled to a user interface to provide indication of the state of the filter element. 5. The module of claim 1, wherein the housing contains a pressure relief section having a relief valve for controlling return flow from an outlet pressure side of the pump section to an inlet side of the pump section. 6. The module of claim 1, wherein the housing contains a shut-off section having a shut-off valve in communication with the pump section and the outlet of the housing for positively closing off flow through the outlet. 7. The module of claim 1, wherein the operating member of the pump includes at least one cam-operated double-ended spool piston. 8. A fuel control module for controlling the flow of fuel from a fuel supply to a fuel consuming device having first and second consumption components, the fuel control module comprising: a housing having an inlet and first and second ports of an outlet and containing a drive section, a pump section, a filter section, a flow divider section, and a shut-off section; the drive section including a motor and an electronic motor drive; the pump section having a piston moved by the motor in response to a signal from the motor drive to effect flow of fuel between the inlet and the outlet of the housing; the filter section having a filter element disposed in communication with the inlet of the housing and the pump section and having a filter bypass valve which opens to allow fuel flow from the inlet to the pump section without passing through the filter element, wherein the filter bypass valve is asymmetric having an enlarged downstream end such that it is pressure activated to open when sufficient pressure acts on the enlarged end; the shut-off section having a shut-off valve in communication with the pump section and the outlet of the housing; and the flow divider section having first and second passageways in communication with the respective first and second outlet ports and having a valve controlling fuel flow through the first passageway such that when the valve is closed fuel is directed only to the second outlet port for delivery to the second consumption component and when the valve is open fuel is directed to both the first and second outlet ports for delivery to the respective first and second consumption components. 9. A fuel control module for controlling the flow of fuel from a fuel supply to a fuel consuming device having first and second consumption components, the fuel control module comprising: a housing defining an interior including a fluid chamber and a dry chamber and having an inlet and an outlet, including first and second outlet ports, in communication with the fluid chamber, the fluid chamber receiving fuel through the inlet and the dry chamber being isolated from fuel; an electronic motor drive disposed in the dry chamber; a motor having a stator and a rotor both disposed in the fluid chamber; a pump having a movable operating member disposed in the fluid chamber and driven by the motor to move fuel from the inlet through the fluid chamber to the outlet; and a flow divider defining first and second passageways in communication with the respective first and second outlet ports and having a valve controlling fuel flow through the first passageway such that when the valve is closed fuel is directed only to the second outlet port for delivery to the second consumption component and when the valve is open fuel is directed to both the first and second outlet ports for delivery to the respective first and second consumption components; a filter assembly having a filter element disposed in communication with the inlet of the housing and the pump and having a filter bypass valve which opens to allow fuel flow from the inlet to the pump without passing through the filter element, wherein the filter bypass valve is asymmetric having an enlarged downstream end such that it is pressure activated to open when sufficient pressure acts on the enlarged end. 10. The module of claim 9, wherein the flow divider valve is pressure operated to open when at a pressure higher than a threshold pressure. 11. The module of claim 9, further including a pressure relief section having a relief valve for controlling return flow from an outlet pressure side of the pump to an inlet side of the pump. 12. The module of claim 9, further including a shut-off section having a shut-off valve in communication with the pump and the outlet of the housing for positively closing off flow through the outlet. 13. The module of claim 9, wherein the operating member of the pump is at least one cam-operated double-ended spool piston. 14. The module of claim 13, wherein the piston has one or more circumferential pressure balancing grooves.