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1.发明申请
公开(公告)号：WO0060239A3
公开(公告)日：2001-01-18
申请号：PCT/US0005939
申请日：2000-03-07
Applicant: UNITED TECHNOLOGIES CORP
Inventor： DYER GERALD P , REUTER CHARLES E
CPC classification number: F02C7/236 , F04D13/14 , F04D15/0005 , F04D15/0072 , Y10T137/2572
Abstract: A system for allowing pumps to run in parallel and preventing back flow through a non-operational pump. The system includes a first pump in parallel with a second pump. The system further includes a check valve in fluid communication with the first pump for preventing flow through the first pump when the first pump is not operating. The system further includes a sensing valve in fluid communication with the first pump and the second pump. The system also includes a load sharing valve in fluid communication with the check valve, the sensing valve, and the second pump for controlling a system flow, wherein the system flow is provided by the first pump when the second pump is not operating, and wherein the system flow is provided by the second pump when the first pump is not operating, and wherein the system flow includes a portion of flow from both the first and second pumps when both pumps are operational.
Abstract translation: 一种允许泵并联运行并防止通过非操作泵的回流的系统。 该系统包括与第二泵并联的第一泵。 该系统还包括与第一泵流体连通的止回阀，用于当第一泵不工作时防止流过第一泵。 该系统还包括与第一泵和第二泵流体连通的传感阀。 该系统还包括与止回阀，感测阀和用于控制系统流量的第二泵流体连通的负载共享阀，其中当第二泵不工作时，系统流由第一泵提供，并且其中 当第一泵不运行时，系统流由第二泵提供，并且其中当两个泵都可操作时，系统流包括来自第一和第二泵的一部分流。
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公开(公告)号：GB2325025A
公开(公告)日：1998-11-11
申请号：GB9710689
申请日：1997-05-24
Applicant: UNITED TECHNOLOGIES CORP
Inventor： VEILLEUX JR LEO J , REUTER CHARLES E
Abstract: In an electronic control for a variable delivery, positive displacement fuel pump 104 a flow sensor 132 provides a signal, indicative of actual fuel flow to the engine, to an electronic engine control 140, which compares actual fuel flow with desired fuel flow, and upon any difference therebetween commands an electrohydraulic servo valve 156 to position a pump control actuator 108. Fuel flow upstream of the flow sensor is bypassed in a line 196 to another section of the electrohydraulic servo valve. The electronic engine control commands a small amount of fuel to be bypassed during normal operating conditions but upon the occurrence of a transient condition, it causes more or less fuel to be bypassed back to the pump inlet.
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公开(公告)号：CA2206919A1
公开(公告)日：1998-12-04
申请号：CA2206919
申请日：1997-06-04
Applicant: UNITED TECHNOLOGIES CORP
Inventor： GAUDET TIMOTHY J , REUTER CHARLES E
Abstract: A hydromechanical control system for a variable delivery, positive displacement fuel pump includes a variable area orifice metering window through which fuel from the pump outlet passes on its way to a gas turbine aircraft engine. The fuel pressures on either side of the fuel metering window are ported to corresponding sides of a spool of a pump control valve. The position of the valve spool controls the fuel flow to either side of a pump control actuator, whose movement varies the displacement of the pump. A bypass fuel flow upstream of the fuel metering valve is also ported to the pump control valve. During steady-state pump operation, a relatively small and constant value of fuel flow is bypassed through the pump control valve and back to the pump inlet. However, upon increasing or decreasing pump speed transients, the bypass fuel flow is increased or decreased in a proportional amount. In this way, improved control of the pump during transient conditions is achieved.
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公开(公告)号：GB2320063B
公开(公告)日：1998-07-15
申请号：GB9804316
申请日：1994-12-09
Applicant: UNITED TECHNOLOGIES CORP
Inventor： DYER GERALD P , REUTER CHARLES E , DONNELLY BRIAN G
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公开(公告)号：DE19722402A1
公开(公告)日：1998-12-03
申请号：DE19722402
申请日：1997-05-28
Applicant: UNITED TECHNOLOGIES CORP
Inventor： REUTER CHARLES E , GAUDET TIMOTHY J
Abstract: A hydromechanical control system for a variable delivery, positive displacement fuel pump includes a variable area orifice metering window through which fuel from the pump outlet passes on its way to a gas turbine aircraft engine. The fuel pressures on either side of the fuel metering window are ported to corresponding sides of a spool of a pump control valve. The position of the valve spool controls the fuel flow to either side of a pump control actuator, whose movement varies the displacement of the pump. A bypass fuel flow upstream of the fuel metering valve is also ported to the pump control valve. During steady-state pump operation, a relatively small and constant value of fuel flow is bypassed through the pump control valve and back to the pump inlet. However, upon increasing or decreasing pump speed transients, the bypass fuel flow is increased or decreased in a proportional amount. In this way, improved control of the pump during transient conditions is achieved.
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Patent Agency Ranking
公开(公告)号：GB2285285A
公开(公告)日：1995-07-05
申请号：GB9424888
申请日：1994-12-09
Applicant: UNITED TECHNOLOGIES CORP
Inventor： DYER GERALD P , REUTER CHARLES E , DONNELLY BRIAN G
Abstract: The system comprises a main fuel manifold (58) being coupled downstream of a sequence valve (28), and a plurality of main fuel nozzles (66) each coupled to the main fuel manifold (58) through a respective main nozzle shut-off valve (96). A first set of pilot nozzles (82) is coupled to the main fuel manifold (58) through the sequence valve (28), and a second set of pilot nozzles (86) is coupled to the main fuel manifold (58) through the sequence valve (28). At low engine speeds, in the first and/or second pilot open positions, fuel flows to either pilot nozzle (82, 86) through the main fuel manifold (58), and the main fuel nozzles (66) are isolated from the main fuel manifold (58) by the main nozzle shut-off valves (96). Then, at higher engine speeds, the main nozzle shut-off valves (96) are opened, and the sequence valve (28) splits the fuel flow from a fuel inlet line (14) between the main fuel manifold (58) and the first and second pilot nozzles (82, 86). The fuel in the main fuel manifold (58) flows to the main fuel nozzles (66), and the remainder of the fuel split off by the sequence valve (28) flows to the first and second pilot nozzles (82, 86).
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公开(公告)号：GB2285285B
公开(公告)日：1998-07-15
申请号：GB9424888
申请日：1994-12-09
Applicant: UNITED TECHNOLOGIES CORP
Inventor： DYER GERALD P , REUTER CHARLES E , DONNELLY BRIAN G
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公开(公告)号：GB2325025B
公开(公告)日：2001-06-27
申请号：GB9710689
申请日：1997-05-24
Applicant: UNITED TECHNOLOGIES CORP
Inventor： VEILLEUX JR LEO J , REUTER CHARLES E
Abstract: An electronic control for a variable delivery, positive displacement fuel pump includes a flow sensor located at the fuel outlet to the engine. The flow sensor provides a signal, indicative of actual fuel flow to the engine, to an electronic engine control. The electronic engine control compares actual fuel flow with desired fuel flow, and upon any difference therebetween commands an electrohydraulic servo valve to position a pump control actuator. The pump control actuator controls the amount of fuel delivered by the pump. Also, fuel flow upstream of the flow sensor is bypassed in a line to another section of the electrohydraulic servo valve. The electronic engine control commands a small amount of fuel to be bypassed back to the pump inlet during normal operating conditions. However, upon the occurrence of a transient condition, the electronic engine control causes more or less fuel to be bypassed back to the pump inlet. In this way, improved transient response of the pump is achieved by the electronic control of the present invention.
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公开(公告)号：GB2325493B
公开(公告)日：2001-06-13
申请号：GB9710691
申请日：1997-05-24
Applicant: UNITED TECHNOLOGIES CORP
Inventor： REUTER CHARLES E , GAUDET TIMOTHY J
Abstract: A hydromechanical control system for a variable delivery, positive displacement fuel pump includes a variable area orifice metering window through which fuel from the pump outlet passes on its way to a gas turbine aircraft engine. The fuel pressures on either side of the fuel metering window are ported to corresponding sides of a spool of a pump control valve. The position of the valve spool controls the fuel flow to either side of a pump control actuator, whose movement varies the displacement of the pump. A bypass fuel flow upstream of the fuel metering valve is also ported to the pump control valve. During steady-state pump operation, a relatively small and constant value of fuel flow is bypassed through the pump control valve and back to the pump inlet. However, upon increasing or decreasing pump speed transients, the bypass fuel flow is increased or decreased in a proportional amount. In this way, improved control of the pump during transient conditions is achieved.
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公开(公告)号：CA2206917A1
公开(公告)日：1998-12-04
申请号：CA2206917
申请日：1997-06-04
Applicant: UNITED TECHNOLOGIES CORP
Inventor： VEILLEUX LEO J JR , REUTER CHARLES E
Abstract: An electronic control for a variable delivery, positive displacement fuel pump includes a flow sensor located at the fuel outlet to the engine. The flow sensor provides a signal, indicative of actual fuel flow to the engine, to an electronic engine control. The electronic engine control compares actual fuel flow with desired fuel flow, and upon any difference therebetween commands an electrohydraulic servo valve to position a pump control actuator. The pump control actuator controls the amount of fuel delivered by the pump. Also, fuel flow upstream of the flow sensor is bypassed in a line to another section of the electrohydraulic servo valve. The electronic engine control commands a small amount of fuel to be bypassed back to the pump inlet during normal operating conditions. However, upon the occurrence of a transient condition, the electronic engine control causes more or less fuel to be bypassed back to the pump inlet. In this way, improved transient response of the pump is achieved by the electronic control of the present invention.
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