EP4092268A1 - Système de pompe de dosage à déplacement variable doté d'une rétroaction multivariée - Google Patents

Système de pompe de dosage à déplacement variable doté d'une rétroaction multivariée Download PDF

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Publication number
EP4092268A1
EP4092268A1 EP22171646.7A EP22171646A EP4092268A1 EP 4092268 A1 EP4092268 A1 EP 4092268A1 EP 22171646 A EP22171646 A EP 22171646A EP 4092268 A1 EP4092268 A1 EP 4092268A1
Authority
EP
European Patent Office
Prior art keywords
actuator
flow sensing
displacement
variable displacement
sensing valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22171646.7A
Other languages
German (de)
English (en)
Inventor
Morgan O'rorke
Ryan SUSCA
Matej Rutar
Todd Haugsjaahabink
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hamilton Sundstrand Corp
Original Assignee
Hamilton Sundstrand Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hamilton Sundstrand Corp filed Critical Hamilton Sundstrand Corp
Publication of EP4092268A1 publication Critical patent/EP4092268A1/fr
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/225—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves with throttling valves or valves varying the pump inlet opening or the outlet opening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B1/141—Details or component parts
    • F04B1/146—Swash plates; Actuating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/26—Control
    • F04B1/28—Control of machines or pumps with stationary cylinders
    • F04B1/29—Control of machines or pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
    • F04B1/295—Control of machines or pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block by changing the inclination of the swash plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/05—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by internal-combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/002—Hydraulic systems to change the pump delivery
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/26—Control
    • F04B1/30—Control of machines or pumps with rotary cylinder blocks
    • F04B1/32—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block
    • F04B1/324—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block by changing the inclination of the swash plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2201/00—Pump parameters
    • F04B2201/06—Valve parameters
    • F04B2201/0606—Opening width or height
    • F04B2201/06062—Opening width or height of the outlet valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/09—Flow through the pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/11—Outlet temperature

Definitions

  • the present disclosure relates to a pump system, and in particular to a metering pump system.
  • Metering pump systems supply fuel to an engine of a vehicle.
  • metering pump systems can supply fuel to a jet turbine engine of an aircraft or to an engine of an automobile.
  • An improved metering pump system is disclosed hereafter.
  • a metering pump system in one example, includes a variable displacement pump having an inlet and an outlet, a flow sensing valve fluidically connected to the outlet of the variable displacement pump, and an actuator mechanically coupled to a displacement mechanism of the variable displacement pump.
  • the metering pump system also includes an electronic engine controller in communication with the flow sensing valve.
  • An electrohydraulic servo valve is electrically connected to the electronic engine controller and is hydraulically connected to the actuator. The electrohydraulic servo valve is configured to hydraulically drive the actuator to move the displacement mechanism to change displacement of the variable displacement pump.
  • a metering pump system in another example, includes a variable displacement pump, an actuator mechanically coupled to the variable displacement pump, and a drive unit connected to the actuator.
  • the metering pump system also includes an electronic engine controller electronically connected to the drive unit, a linear variable displacement transducer on the actuator and configured to measure a position of the actuator.
  • the linear variable displacement transducer is in communication with the electronic engine controller.
  • the metering pump system also includes a flow sensing valve fluidically connected to an outlet of the variable displacement pump.
  • the flow sensing valve includes a resistance temperature detector configured to measure a temperature of fuel flow in the flow sensing valve.
  • the resistance temperature detector is electrically connected to the electronic engine controller.
  • the flow sensing valve also includes a second linear variable displacement transducer configured to measure a linear displacement of the flow sensing valve.
  • the linear variable displacement transducer is electrically connected to the electronic engine controller.
  • a method of pumping in a system includes pumping fuel through the system with a variable displacement pump, wherein the variable displacement pump comprises a displacement mechanism mechanically connected to an actuator.
  • the fuel is directed through a flow sensing valve connected to an outlet of the variable displacement pump.
  • a temperature of the fuel flowing through the flow sensing valve is sensed via a resistance differential transducer.
  • a linear displacement of the flow sensing valve is sensed via a linear variable differential transducer.
  • the method also includes communicating the temperature of the fuel flowing through the flow sensing valve and the linear displacement of the flow sensing valve to an electronic engine controller.
  • An electrical current is delivered to a servo valve by the electronic engine controller.
  • the servo valve moves the actuator to actuate the displacement mechanism of the variable displacement pump and alter displacement of the variable displacement pump.
  • FIG. 1 is a schematic diagram of a metering pump system.
  • a metering pump system includes a variable displacement pump, a flow sensing valve, an actuator, an electronic engine controller, and a servo valve.
  • the flow sensing valve includes a resistance temperature detector and a linear variable differential transducer configured to measure the temperature of fuel flow through the flow sensing valve and a linear displacement of the flow sensing valve.
  • the actuator is connected to a displacement mechanism of the variable differential pump.
  • the actuator includes another linear variable differential transducer configured to sense or measure the linear displacement of the actuator.
  • the electronic engine controller can calculate a flow rate of fuel exiting the variable displacement pump using the sensed temperature of fuel flow through the flow sensing valve and sensed linear displacement of the flow sensing valve.
  • the electronic engine controller can also calculate a predicted flow rate of fuel leaving the variable displacement pump using the linear displacement of the actuator.
  • the electronic engine controller can compare the calculated flow rate through the flow sensing valve and the predicted flow out of the variable displacement pump to determine the wear of the variable displacement pump.
  • the metering pump system can use the actuator to adjust the displacement mechanism of the variable displacement pump based on the flow rate through the flow sensing valve to optimize the performance of the system. The metering pump system will be discussed with reference to FIG. 1 .
  • FIG. 1 is a schematic diagram of metering pump system 10.
  • Metering pump system 10 includes variable displacement pump 12, flow sensing valve 20, actuator 30, electronic engine controller 50, and drive unit 58 with servo valve 60.
  • Variable displacement pump 12 includes inlet 14, outlet 16, and displacement mechanism 18.
  • Flow sensing valve 20 includes resistance temperature detector 22 and linear variable differential transducer 24.
  • Actuator 30 is a piston assembly including housing 32, piston cylinder 34, fluid chamber 36, spring chamber 38, piston rod 40, and linear variable differential transducer 42.
  • Flow sensing valve 20 is fluidically connected to outlet 16 of variable displacement pump 12.
  • Resistance temperature detector 22 is in contact with an interior of flow sensing valve 20 and is configured to measure a temperature of fuel flow through flow sensing valve 20.
  • Linear variable differential transducer is also in contact with an interior of flow sensing valve 20 and is configured to measure a linear displacement of flow sensing valve 20.
  • flow sensing valve 20 can be the valve disclosed in U.S. Patent Pub. 2010/0251814 , which is incorporated herein by reference.
  • flow sensing valve 20 can be any other valve used to determine the flow rate of a fluid within a system.
  • Actuator 30 is mechanically coupled to displacement mechanism 18 of variable displacement pump 12. Piston cylinder 34, fluid chamber 36, and spring chamber 38 are contained inside housing 32 of actuator 30. Fluid chamber 36 is on a first side of piston cylinder 34. Spring chamber 38 is opposite fluid chamber 36 relative to piston cylinder 34. Piston rod 40 is attached to piston cylinder 34 and extends outside of housing 32. Piston rod 40 is operably connected to displacement mechanism 18 of variable displacement pump 12. Linear variable differential transducer 42 of actuator 30 is configured to measure a linear displacement of actuator 30. Linear variable differential transducer 42 of actuator 30 can measure a liner displacement of actuator 30 by measuring a linear displacement of piston cylinder 34 and/or piston rod 40.
  • Electronic engine controller 50 is in communication with flow sensing valve 20. More specifically, electronic engine controller 50 is in communication with resistance temperature detector 22 and linear variable differential transducer 24 of flow sensing valve 20. Electronic engine controller 50 is also in communication with linear variable differential transducer 42 of actuator 30. Thus, resistance temperature detector 22 and linear variable differential transducer 24 of flow sensing valve 20, linear variable differential transducer 42 of actuator 30, and electronic engine controller 50 form a continuous positive feedback loop.
  • Drive unit 58 includes servo valve 60.
  • Servo valve 60 is electrically connected to electronic engine controller 50 and hydraulically connected to actuator 30.
  • Servo valve 60 is configured to hydraulically drive actuator 30 to move displacement mechanism 18 to change displacement of variable displacement pump 12.
  • Servo valve 60 can be an electrohydraulic servo valve that drives actuator 30 by directing fuel from outlet 16 of variable displacement pump 12 to fluid chamber 36 of actuator 30.
  • servo valve 60 can direct fuel or fluid from inlet 14 of variable displacement pump 12, or any other suitable source, to fluid chamber 36 of actuator 30.
  • displacement mechanism 18 can be a swashplate.
  • displacement mechanism 18 can be any other mechanism that alters the displacement of variable displacement pumps.
  • servo valve 60 can be an electropneumatic, electromechanical, or any other kind of servo valve.
  • variable displacement pump 12 In operation, variable displacement pump 12 generates fuel flow in metering pump system 10 and pulls fuel through inlet 14. The fuel flow is pushed out outlet 16 of variable displacement pump 12 and through flow sensing valve 20.
  • Resistance temperature detector 22 senses a temperature of the fuel flowing through flow sensing valve 20.
  • Linear variable differential transducer 24 senses a linear displacement of sensing valve 20. Resistance temperature detector 22 and linear variable differential transducer 24 communicate the sensed temperature of the fuel flowing through flow sensing valve 20 and the sensed linear displacement of sensing valve 20 to electronic engine controller 50.
  • Electronic engine controller 50 determines an actual flow rate of fuel through flow sensing valve 20 using the sensed temperature of the fuel flowing through flow sensing valve 20 and sensed linear displacement of flow sensing valve 20. After receiving the sensed temperature of the fuel flowing through flow sensing valve 20 and the sensed linear displacement of flow sensing valve 20, electronic engine controller 50 calculates the actual flow rate of the fuel flowing through flow sensing valve 20. In response to the calculated flow rate of fuel flowing through flow sensing valve 20, electronic engine controller delivers an electrical current to servo valve 60. In response to the electrical current received by servo valve 60, servo valve 60 sends hydraulic fluid to actuator 30 or releases hydraulic fluid from actuator 30 to adjust the output of variable displacement pump 12.
  • piston rod 40 is operably connected to displacement mechanism (i.e., swashplate) 18 of variable displacement pump 12.
  • displacement mechanism 18 of variable displacement pump 12.
  • piston rod 40 actuates displacement mechanism 18 of variable displacement pump 12.
  • displacement of variable displacement pump 12 changes. Therefore, the displacement of variable displacement pump 12 is changed in response to the temperature of the fuel flowing through flow sensing valve 20 and the linear displacement of flow sensing valve 20.
  • Electronic engine controller 50 determines a predicted flow rate of fuel out of variable displacement pump 12 using the linear displacement of actuator 30.
  • Linear variable differential transducer 42 of actuator 30 senses a linear displacement of actuator 30 and communicates the linear displacement of actuator 30 to electronic engine controller 50.
  • Metering pump system 10 can be pre-calibrated such that electronic engine controller 50 can convert a position measurement of actuator 30 to a position measurement of displacement mechanism 18.
  • Electronic engine 50 can be pre-programed to convert the position measurement of displacement mechanism 18 to a predicted flow rate of variable displacement pump 12.
  • Electronic engine controller 50 can compare the actual flow rate of the fuel flow through flow sensing valve 20 with the predicted flow rate of the fuel out of variable displacement pump 12 to analyze the performance of variable displacement pump 12.
  • variable displacement pump 12 can be worn. Additionally, in response to the variance between the actual flow rate of fuel flow through flow sensing valve 20 with the predicted flow rate of the fuel out of variable displacement pump 12, electronic engine controller 50 can increase the current sent to servo valve 60. Servo valve 60 can then increase the hydraulic fluid sent to actuator 30, which will further actuate displacement mechanism 18, which will increase the pumping rate of variable displacement pump 12 to compensate for the difference between the predicted flow rate and the actual flow rate.
  • Metering pump system 10 includes one or more processors and computer-readable memory can contain software that is executable to produce an actual flow rate of fuel through flow sensing valve 20 using the sensed temperature of the fuel flowing through flow sensing valve 20 and sensed linear displacement of flow sensing valve 20. Further, the one or more processors and computer-readable memory can include software that is executable to convert the position measurement of displacement mechanism 18 to a predicted flow rate of variable displacement pump 12. Lastly, the one or more processors and computer-readable memory can contain software that compares the actual flow rate of the fuel flow through flow sensing valve 20 with the predicted flow rate of the fuel out of variable displacement pump 12 to analyze the performance of variable displacement pump 12.
  • a metering pump system includes a variable displacement pump having an inlet and an outlet, a flow sensing valve fluidically connected to the outlet of the variable displacement pump, and an actuator mechanically coupled to a displacement mechanism of the variable displacement pump.
  • the metering pump system also includes an electronic engine controller in communication with the flow sensing valve.
  • An electrohydraulic servo valve is electrically connected to the electronic engine controller and is hydraulically connected to the actuator. The electrohydraulic servo valve is configured to hydraulically drive the actuator to move the displacement mechanism to change displacement of the variable displacement pump.
  • the metering pump of the preceding paragraph can optionally include, additionally and/or alternatively, any one or more of the following features, configurations and/or additional components:
  • a metering pump system includes a variable displacement pump, an actuator mechanically coupled to the variable displacement pump, and a drive unit connected to the actuator.
  • the metering pump system also includes an electronic engine controller electronically connected to the drive unit, a linear variable displacement transducer on the actuator and configured to measure a position of the actuator.
  • the linear variable displacement transducer is in communication with the electronic engine controller.
  • the metering pump system also includes a flow sensing valve fluidically connected to an outlet of the variable displacement pump.
  • the flow sensing valve includes a resistance temperature detector configured to measure a temperature of fuel flow in the flow sensing valve.
  • the resistance temperature detector is electrically connected to the electronic engine controller.
  • the flow sensing valve also includes a second linear variable displacement transducer configured to measure a linear displacement of the flow sensing valve.
  • the linear variable displacement transducer is electrically connected to the electronic engine controller.
  • the metering pump of the preceding paragraph can optionally include, additionally and/or alternatively, any one or more of the following features, configurations and/or additional components:
  • a method of pumping in a system includes pumping fuel through the system with a variable displacement pump, wherein the variable displacement pump comprises a displacement mechanism mechanically connected to an actuator.
  • the fuel is directed through a flow sensing valve connected to an outlet of the variable displacement pump.
  • a temperature of the fuel flowing through the flow sensing valve is sensed via a resistance differential transducer.
  • a linear displacement of the flow sensing valve is sensed via a linear variable differential transducer.
  • the method also includes communicating the temperature of the fuel flowing through the flow sensing valve and the linear displacement of the flow sensing valve to an electronic engine controller.
  • An electrical current is delivered to a servo valve by the electronic engine controller.
  • the servo valve moves the actuator to actuate the displacement mechanism of the variable displacement pump and alter displacement of the variable displacement pump.
  • the method of the preceding paragraph can optionally include, additionally and/or alternatively, any one or more of the following features, configurations and/or additional components:
  • actuator 30 can be any actuator that uses electricity, pneumatics, hydraulics, and/or any other combination of energy.
  • Actuator 30 can be a linear screw drive and drive unit 58 for actuator 30 can be an electric motor.
  • many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment(s) disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
EP22171646.7A 2021-05-18 2022-05-04 Système de pompe de dosage à déplacement variable doté d'une rétroaction multivariée Pending EP4092268A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US17/324,014 US20220372968A1 (en) 2021-05-18 2021-05-18 Variable displacement metering pump system with multivariate feedback

Publications (1)

Publication Number Publication Date
EP4092268A1 true EP4092268A1 (fr) 2022-11-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP22171646.7A Pending EP4092268A1 (fr) 2021-05-18 2022-05-04 Système de pompe de dosage à déplacement variable doté d'une rétroaction multivariée

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EP (1) EP4092268A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6443705B1 (en) * 2000-11-28 2002-09-03 Ingersoll-Rand Company Direct drive variable displacement pump
US20100251814A1 (en) 2009-04-06 2010-10-07 Woodward Governor Company Flow Sensing Shutoff Valve
US20110182752A1 (en) * 2010-01-22 2011-07-28 Josef Frank Method for controlling the feed rate of a feed pump
US20180340501A1 (en) * 2017-05-23 2018-11-29 Weishun Willaim Ni Variable displacement fuel pump with position sensor
US20200125123A1 (en) * 2018-10-18 2020-04-23 Parker-Hannifin Corporation Hydraulic pump health monitoring

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5326476A (en) * 1991-04-19 1994-07-05 Althin Medical, Inc. Method and apparatus for kidney dialysis using machine with programmable memory
DE4327667A1 (de) * 1993-08-17 1995-02-23 Sauer Sundstrand Gmbh & Co Steuerungsvorrichtung für verstellbare Hydromaschinen
US6102001A (en) * 1998-12-04 2000-08-15 Woodward Governor Company Variable displacement pump fuel metering system and electrohydraulic servo-valve for controlling the same
JP4582981B2 (ja) * 1999-07-14 2010-11-17 油研工業株式会社 油圧パワー供給システム
JP4355792B2 (ja) * 2002-08-29 2009-11-04 東京瓦斯株式会社 熱式流量計
WO2017160904A1 (fr) * 2016-03-15 2017-09-21 The Coca-Cola Company Système d'étalonnage de pompe de distributeur
KR20170135576A (ko) * 2016-05-31 2017-12-08 (주)엘오티베큠 진공펌프의 자가진단장치 및 방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6443705B1 (en) * 2000-11-28 2002-09-03 Ingersoll-Rand Company Direct drive variable displacement pump
US20100251814A1 (en) 2009-04-06 2010-10-07 Woodward Governor Company Flow Sensing Shutoff Valve
US20110182752A1 (en) * 2010-01-22 2011-07-28 Josef Frank Method for controlling the feed rate of a feed pump
US20180340501A1 (en) * 2017-05-23 2018-11-29 Weishun Willaim Ni Variable displacement fuel pump with position sensor
US20200125123A1 (en) * 2018-10-18 2020-04-23 Parker-Hannifin Corporation Hydraulic pump health monitoring

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