Patent US4496367A successfully refreshed from Google Patents.
Patent US3777480A successfully refreshed from Google Patents.
US3777480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas turbine fuel control
Assignee: Motors Liquidation Co
•
Filing: 1972-03-20
•
Granted: 1973-12-11
•
Expires: 1992-03-20
Abstract
Abstract A fuel control disclosed in connection with a gas-coupled gas tubine engine for shaft power output purposes. The fuel control is supplied by a transfer pump and a pressure pump in series and delivers fuel to a nozzle in the engine combustion apparatus. The control receives an input of gas generator speed and an input of compressor discharge pressure. It receives electrical inputs serving to limit turbine inlet temperature and power turbine speed, and may include an electrical On-Off input. Flow of fuel to the engine is directly controlled by a slave valve which responds to pressure of fuel delivered to the nozzle and to a control pressure derived from the pressure pump outlet. The control pressure is developed between an upstream orifice and parallel downstream valves which include a solenoid valve operated to limit turbine inlet temperature and power turbine speed, a valve responsive to compressor discharge pressure, and a governor valve responsive to gas generator turbine speed. The OnOff control bleeds the nozzle to the fuel tank when the engine is turned off. During engine deceleration, the slave valve stops fuel flow without emptying the nozzle and the fuel line to it. The metering head across the slave valve is controlled by a differential pressure responsive by-pass valve which discharges excess fuel to the pressure pump inlet. The by-pass valve may define a passage for fuel to maintain a pilot flame during deceleration.
Inventors
- 👤 D Stoltman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:19
CPC Classifications
F; F02; F02C; F02C9/00; F02C9/26; F02C9/32; F02C9/36
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
212 words
A fuel supply system for a gas turbine engine comprising, in combination, a pressure pump and fuel control means connected between the pressure pump and the engine fuel line, the fuel control means including a fuel controlling valve supplied by the pressure pump, the fuel controlling valve including closing means biased to close the valve by engine fuel pressure and opening means biased to open the valve by a control pressure, the fuel controlling valve having a closed condition blocking flow to the engine; means for generating the control pressure including a conduit connected for flow from the pump in series through an orifice, an intermediate conduit section, and controllable valve means downstream of the intermediate conduit section, the intermediate conduit section being connected to the said opening means so that the fuel controlling valve responds to the condition of the controllable valve means; the said controllable valve means being connected in parallel and including a variably settable governor valve responsive to speed of an engine component indicative of engine power level and a limiting valve effective to limit a condition of engine operation; the said controllable valve means being connected to discharge to the pressure pump inlet; and means effective to maintain a controlled pressure drop across the fuel controlling valve.
Claim 2
Dependent Claim
212 words
A fuel supply system for a gas turbine engine comprising, in combination, a pressure pump and fuel control means connected between the pressure pump and the engine fuel line, the fuel control means including a fuel controlling valve supplied by the pressure pump, the fuel controlling valve including closing means biased to close the valve by engine fuel pressure and opening means biased to open the valve by a control pressure, the fuel controlling valve having a closed condition blocking flow to the engine; means for generating the control pressure including a conduit connected for flow from the pump in series through an orifice, an intermediate conduit section, and controllable valve means downstream of the intermediate conduit section, the intermediate conduit section being connected to the said opening means so that the fuel controlling valve responds to the condition of the controllable valve means; the said controllable valve means being connected in parallel and including a variably settable governor valve responsive to speed of an engine component indicative of engine power level and a limiting valve effective to limit a condition of engine operation; the said controllable valve means being connected to discharge to the pressure pump inlet; and means effective to maintain a controlled pressure drop across the fuel controlling valve.
Claim 3
Dependent Claim
236 words
A fuel supply system for a gas turbine engine comprising, in combination, a pressure pump and fuel control means connected between The pressure pump and the engine fuel line, the fuel control means including a fuel controlling valve supplied by the pressure pump, the fuel controlling valve including closing means biased to close the valve by engine fuel pressure and opening means biased to open the valve by a control pressure, the fuel controlling valve having a closed condition blocking flow to the engine; means for generating the control pressure including a conduit connected for flow from the pump in series through an orifice, an intermediate conduit section, and controllable valve means downstream of the intermediate conduit section, the intermediate conduit section being connected to the said opening means so that the fuel controlling valve responds to the condition of the controllable valve means; the said controllable valve means being connected in parallel and including a variably settable governor valve responsive to speed of an engine component indicative of engine power level and a limiting valve effective to limit a condition of engine operation; the said controllable valve means being connected to discharge to the pressure pump inlet; means effective to maintain a controlled pressure drop across the fuel controlling valve; and optionally operable means effective to bleed the engine fuel line to the fuel tank only when the fuel controlling valve is in closed condition.
Claim 4
Dependent Claim
236 words
A fuel supply system for a gas turbine engine comprising, in combination, a pressure pump and fuel control means connected between The pressure pump and the engine fuel line, the fuel control means including a fuel controlling valve supplied by the pressure pump, the fuel controlling valve including closing means biased to close the valve by engine fuel pressure and opening means biased to open the valve by a control pressure, the fuel controlling valve having a closed condition blocking flow to the engine; means for generating the control pressure including a conduit connected for flow from the pump in series through an orifice, an intermediate conduit section, and controllable valve means downstream of the intermediate conduit section, the intermediate conduit section being connected to the said opening means so that the fuel controlling valve responds to the condition of the controllable valve means; the said controllable valve means being connected in parallel and including a variably settable governor valve responsive to speed of an engine component indicative of engine power level and a limiting valve effective to limit a condition of engine operation; the said controllable valve means being connected to discharge to the pressure pump inlet; means effective to maintain a controlled pressure drop across the fuel controlling valve; and optionally operable means effective to bleed the engine fuel line to the fuel tank only when the fuel controlling valve is in closed condition.
Claim 5
Dependent Claim
246 words
A fuel supply system for a gas turbine engine comprising, in combination, a pressure pump and fuel control means connected between the pressure pump and the engine fuel line, the fuel control means including a fuel controlling valve supplied by the pressure pump, the fuel controlling valve including closing means biased to close the valve by engine fuel pressure and opening means biased to open the valve by a control pressure, the fuel controlling valve having a closed condition blocking flow to the engine; means for generating the control pressure including a conduit connected for flow from the pump in series through an orifice, an intermediate conduit section, and controllable valve means downstream of the intermediate conduit section, the intermediate conduit section being connected to the said opening means so that the fuel controlling valve responds to the condition of the controllable valve means; the said controllable valve means being connected in parallel and including a variably settable governor valve responsive to speed of an engine component indicative of engine power level, a limiting valve effective to limit a condition of engine operation, and a pressure limiting valve group, the pressure limiting valve group comprising a relief valve and a valve opened at a predetermined compressor discharge pressure, the valves of the said group being connected in series; the said controllable valve means being connected to discharge to the pressure pump inlet; and means effective to maintain a controlled pressure drop across the fuel controlling valve.
Claim 6
Dependent Claim
246 words
A fuel supply system for a gas turbine engine comprising, in combination, a pressure pump and fuel control means connected between the pressure pump and the engine fuel line, the fuel control means including a fuel controlling valve supplied by the pressure pump, the fuel controlling valve including closing means biased to close the valve by engine fuel pressure and opening means biased to open the valve by a control pressure, the fuel controlling valve having a closed condition blocking flow to the engine; means for generating the control pressure including a conduit connected for flow from the pump in series through an orifice, an intermediate conduit section, and controllable valve means downstream of the intermediate conduit section, the intermediate conduit section being connected to the said opening means so that the fuel controlling valve responds to the condition of the controllable valve means; the said controllable valve means being connected in parallel and including a variably settable governor valve responsive to speed of an engine component indicative of engine power level, a limiting valve effective to limit a condition of engine operation, and a pressure limiting valve group, the pressure limiting valve group comprising a relief valve and a valve opened at a predetermined compressor discharge pressure, the valves of the said group being connected in series; the said controllable valve means being connected to discharge to the pressure pump inlet; and means effective to maintain a controlled pressure drop across the fuel controlling valve.
Claim 7
Dependent Claim
299 words
A fuel supply system for a gas turbine engine comprising, in combination, a fuel tank, a transfer pump supplied by the tank, a pressure pump supplied by the transfer pump, and fuel control means connected between the pressure pump and the engine fuel line, the fuel control means including a fuel controlling valve supplied by the pressure pump, the fuel controlling valve including closing means biased to close the valve by engine fuel pressure and opening means biased to open the valve by a control pressure, the fuel controlling valve having a closed condition blocking flow to the engine; means for generating the control pressure including a conduit connected for flow from the pressure pump in series through an orifice, an intermediate conduit section, and controllable valve means downstream of the intermediate conduit section, the intermediate conduit section being connected to the said opening means so that the fuel controlling valve responds to the condition of the controllable valve means; the said controllable valve means being connected in parallel and including a Variably settable governor valve responsive to speed of an engine component indicative of engine power level, a limiting valve effective to limit a condition of engine operation, and a pressure limiting valve group, the pressure limiting valve group comprising a relief valve and a valve opened at a predetermined compressor discharge pressure, the valves of the said group being connected in series; the said controllable valve means being connected to discharge to the pressure pump inlet; a metering head regulating by-pass valve connected between the pressure pump outlet and inlet effective to maintain a controlled pressure drop across the fuel controlling valve; and optionally operable means effective to bleed the engine fuel line to the fuel tank only when the fuel controlling valve is in closed condition.
Claim 8
Dependent Claim
299 words
A fuel supply system for a gas turbine engine comprising, in combination, a fuel tank, a transfer pump supplied by the tank, a pressure pump supplied by the transfer pump, and fuel control means connected between the pressure pump and the engine fuel line, the fuel control means including a fuel controlling valve supplied by the pressure pump, the fuel controlling valve including closing means biased to close the valve by engine fuel pressure and opening means biased to open the valve by a control pressure, the fuel controlling valve having a closed condition blocking flow to the engine; means for generating the control pressure including a conduit connected for flow from the pressure pump in series through an orifice, an intermediate conduit section, and controllable valve means downstream of the intermediate conduit section, the intermediate conduit section being connected to the said opening means so that the fuel controlling valve responds to the condition of the controllable valve means; the said controllable valve means being connected in parallel and including a Variably settable governor valve responsive to speed of an engine component indicative of engine power level, a limiting valve effective to limit a condition of engine operation, and a pressure limiting valve group, the pressure limiting valve group comprising a relief valve and a valve opened at a predetermined compressor discharge pressure, the valves of the said group being connected in series; the said controllable valve means being connected to discharge to the pressure pump inlet; a metering head regulating by-pass valve connected between the pressure pump outlet and inlet effective to maintain a controlled pressure drop across the fuel controlling valve; and optionally operable means effective to bleed the engine fuel line to the fuel tank only when the fuel controlling valve is in closed condition.
Claim 9
Dependent Claim
285 words
A fuel supply system for a gas turbine engine comprising, in combination, a pressure pump and fuel control means connected between the pressure pump and the engine fuel line, the fuel control means including a fuel controlling valve supplied by the pressure pump, the fuel controlling valve including closing means biased to close the valve by engine fuel pressure and opening means biased to open the valve by a control pressure, the fuel controlling valve having a closed condition blocking flow to the engine; means for generating the control pressure including a conduit connected for flow from the pump in series through an orifice, an intermediate conduit section, and controllable valve means downstream of the intermediate conduit section, the intermediate conduit section being connected to the said opening means so that the fuel controlling valve responds to the condition of the controllable valve means; the said controllable valve means being connected in parallel and including a variably settable governor valve responsive to speed of an engine component indicative of engine power level and a limiting valve effective to limit a condition of engine operation; the said controllable valve means being connected to discharge to the pressure pump inlet; and means effective to maintain a controlled pressure drop across the fuel controlling valve, the last-named means being a by-pass valve including a valve cylinder, a valve piston in the cylinder subjected to the fuel pressures at inlet and outlet to the fuel controlling valve exerted on opposed faces of the piston, means biasing the piston to maintain a predetermined differential between the said pressures; and means defining an orifice through the piston for flow of fuel at a predetermined minimum rate to the engine fuel line.
Claim 10
Dependent Claim
285 words
A fuel supply system for a gas turbine engine comprising, in combination, a pressure pump and fuel control means connected between the pressure pump and the engine fuel line, the fuel control means including a fuel controlling valve supplied by the pressure pump, the fuel controlling valve including closing means biased to close the valve by engine fuel pressure and opening means biased to open the valve by a control pressure, the fuel controlling valve having a closed condition blocking flow to the engine; means for generating the control pressure including a conduit connected for flow from the pump in series through an orifice, an intermediate conduit section, and controllable valve means downstream of the intermediate conduit section, the intermediate conduit section being connected to the said opening means so that the fuel controlling valve responds to the condition of the controllable valve means; the said controllable valve means being connected in parallel and including a variably settable governor valve responsive to speed of an engine component indicative of engine power level and a limiting valve effective to limit a condition of engine operation; the said controllable valve means being connected to discharge to the pressure pump inlet; and means effective to maintain a controlled pressure drop across the fuel controlling valve, the last-named means being a by-pass valve including a valve cylinder, a valve piston in the cylinder subjected to the fuel pressures at inlet and outlet to the fuel controlling valve exerted on opposed faces of the piston, means biasing the piston to maintain a predetermined differential between the said pressures; and means defining an orifice through the piston for flow of fuel at a predetermined minimum rate to the engine fuel line.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |