CN114718737B - Flow open-loop control method of electric fuel pump - Google Patents
Flow open-loop control method of electric fuel pump Download PDFInfo
- Publication number
- CN114718737B CN114718737B CN202210371870.4A CN202210371870A CN114718737B CN 114718737 B CN114718737 B CN 114718737B CN 202210371870 A CN202210371870 A CN 202210371870A CN 114718737 B CN114718737 B CN 114718737B
- Authority
- CN
- China
- Prior art keywords
- flow
- gear pump
- loop control
- fuel
- electric
- 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.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C9/00—Controlling gas-turbine plants; Controlling fuel supply in air- breathing jet-propulsion plants
- F02C9/26—Control of fuel supply
- F02C9/30—Control of fuel supply characterised by variable fuel pump output
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention relates to a flow open-loop control method of an electric fuel pump, which comprises the following steps: the controller converts the received mass flow instruction Wref into a required volume flow instruction Qref according to the fuel temperature T; and 2, performing linear interpolation query according to a relation table between the calibrated volume flow and the pressure difference of the fuel nozzle and the pressure difference between the volume flow and the pressure difference of the pressurizing metering valve by the volume flow command Qref to obtain the pressure difference fatter Pnzl of the fuel nozzle and the pressure difference fatter Pfpv of the pressurizing metering valve. The invention has simple structure and small occupied space; the method realizes the accurate metering of the fuel flow of the electric fuel pump in an open loop manner, and solves the problem that closed loop control cannot be completed when the displacement measurement of the booster metering valve fails in the closed loop control process of the electric fuel pump.
Description
Technical Field
The invention belongs to the field of fuel flow control of aeroengines, and relates to a flow open-loop control method of an electric fuel pump.
Background
The multi-electric engine is an aviation turbine engine, replaces the traditional hydraulic mechanical control system by utilizing a motor-driven system, has the advantages of less fuel loss and high safety and reliability, and is a trend of the next generation of advanced engines. The electric fuel pump measures the fuel flow by using the flowmeter, and the fuel flow flowing through the flowmeter and the displacement of the flowmeter are in a linear relation under the condition that the pressure difference between the front and the rear of the flowmeter is constant. Therefore, the flow output of the fuel pump is controlled by directly controlling the rotational speed of the motor and performing closed-loop control on the displacement of the flow meter. When the displacement measurement of the flowmeter fails, closed-loop control of the valve displacement is disabled. It is desirable to introduce an open loop control method of flow as an alternative to closed loop control. Meanwhile, the open loop control method does not need a flowmeter to reduce the cost and improve the reliability in the current requirements of the medium and small aeroengines on the cost reduction of the electric fuel pump.
Disclosure of Invention
The invention aims to provide a flow open-loop control method of an electric fuel pump, which can solve the problem that closed-loop control of valve displacement cannot be performed when displacement measurement of a flowmeter fails.
According to the technical scheme provided by the invention: an open-loop control method for the flow of an electric fuel pump comprises the following steps:
step 1, the controller converts a received mass flow instruction Wref into a required volume flow instruction Qref according to the fuel temperature T;
step 2, carrying out linear interpolation query according to a relation table between the calibrated volume flow and the pressure difference of the fuel nozzle and the pressure difference between the volume flow and the pressure difference of the pressurizing metering valve by the volume flow command Qref to obtain the pressure difference delta Pnzl of the fuel nozzle and the pressure difference delta Pfpv of the pressurizing metering valve;
step 3, calculating to obtain a gear pump differential pressure delta Php by utilizing a fuel nozzle differential pressure delta Pnzl and a booster metering valve differential pressure delta Pfpv and combining engine combustion chamber back pressure CDP and fuel inlet pressure P0; when the booster metering valve is eliminated in a low cost solution, then there is no booster metering valve differential pressure Δpfpv;
step 4, calculating the volume internal leakage flow Qleak by utilizing the gear pump differential pressure delta Php and combining the calculated internal leakage gap Aleak of the gear pump;
step 5, taking the sum of the volume internal leakage flow Qleak and the volume flow command Qref as a total volume flow command Qsum, and carrying out linear interpolation query according to a relation table between the volume flow and the rotating speed of the gear pump to obtain a given rotating speed command omega ref;
and 6, outputting a given rotating speed command omega ref to a motor rotating speed ring, and driving the motor through a controller after the rotating speed ring is operated, so as to control the rotating speed of the gear pump, thereby realizing the open-loop control of the flow of the electric fuel pump.
As a further improvement of the invention, in the step 4, the internal leakage clearance Aleak of the gear pump is obtained by calibration calculation, and when the gear pump is calibrated, the internal leakage flow Qleak of the gear pump is obtained by calculating the difference value between the volume flow command Qref of the electric fuel pump and the actual flow Qfb, the differential pressure delta Php of the gear pump before and after the moment is tested, and the internal leakage clearance Aleak and Cd of the gear pump are obtained by calculating a flow formula as a flow coefficient, wherein the calculation formula is as follows:
。
as a further development of the invention, the mass flow command Wref is sent by the aircraft engine controller.
1. The invention has simple structure and small occupied space; the method realizes the accurate metering of the fuel flow of the electric fuel pump in an open loop manner, and solves the problem that closed loop control cannot be completed when the displacement measurement of the booster metering valve fails in the closed loop control process of the electric fuel pump.
2. The open-loop control method of the invention is in face of the requirement of the current market on the cost reduction of the electric fuel pump, and the supercharging metering valve and the displacement measuring sensor thereof are not needed, so that the cost reduction and the reliability improvement are realized.
Drawings
Fig. 1 is a schematic diagram of the electric fuel pump drive of the present invention.
Fig. 2 is a schematic diagram of an electric flow open-loop control method of the present invention.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the invention herein. Furthermore, the terms "include" and "have," and the like, mean that other content not already listed may be "included" and "provided" in addition to those already listed in "include" and "provided; for example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements not expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In fig. 1-2, comprising a 1-electric controller, a 2-motor, a 3-gear pump, a 4-relief valve, a 5-flow meter 5, 6-fuel temperature sensor, a 7-fuel nozzle, the flow meter 5, wref-given mass flow, ρ -fuel density, qref-given volume flow, Δpnzl-nozzle differential pressure, Δpfpv-flow meter 5 differential pressure, which is not present in the low cost solution, CDP-combustion chamber back pressure, P0-fuel inlet pressure, Δphp-gear pump differential pressure, aleak-gear pump internal leakage gap, qleak-gear pump internal leakage flow, qsum-given total flow, Ω ref-given rotational speed, Ω -actual rotational speed, qp-gear pump actual volume flow, wp-gear pump actual mass flow, cd-flow coefficient, etc. can be eliminated in the low cost solution.
As shown in fig. 1, the driving structure of the electric fuel pump comprises a gear pump 3, the gear pump 3 is driven by a motor 2, the motor 2 is controlled by an electric controller 1, the output end of the gear pump 3 is communicated with a fuel nozzle 7 through a pipeline, a flowmeter 5 and a fuel temperature sensor 6 are arranged on the pipeline of the output end of the gear pump 3 communicated with the fuel nozzle 7, and the signal output end of the fuel temperature sensor 6 is connected with the electric controller 1.
The electric controller 1 receives mass flow command signals, obtains volume flow command signals according to fuel densities at different temperatures, interpolates a flow pressure relation table of the fuel nozzle 7 and the flowmeter 5 to obtain nozzle pressure difference and pressurizing metering valve pressure difference, and obtains pressure difference of the gear pump by combining combustion chamber back pressure and gear pump inlet pressure, obtains internal leakage gap of the gear pump by calculation, obtains theoretical internal leakage flow and compensates the theoretical internal leakage flow into the volume flow command signals. The corresponding given rotating speed is obtained through linear interpolation by the gear pump flow rotating speed relation table, the control motor 2 drives the gear pump 3 to rotate to supply fuel, the open-loop control of the electric fuel pump flow is realized, and the problem that closed-loop control cannot be completed when the displacement measurement of the flowmeter 5 fails in the closed-loop control process of the electric fuel pump is solved. Meanwhile, the open loop control method in the invention can cancel the flowmeter 5 to play a role in reducing the cost and improving the reliability in facing the requirement of the current medium and small aeroengines on the cost reduction of the electric fuel pump.
As shown in fig. 2, the invention is a flow open loop control method of an electric fuel pump, comprising the following steps: step one, the electric controller 1 converts the received mass flow instruction Wref into a required volume flow instruction Qref according to the fuel temperature T;
the mass flow command Wref is sent by the aero-engine controller;
step two, the electric controller 1 carries out linear interpolation inquiry according to a relation table between the calibrated volume flow and the differential pressure of the fuel nozzle 7 and the differential pressure of the volume flow and the differential pressure of the flowmeter 5 by the volume flow command Qref to obtain the differential pressure delta Pnzl of the fuel nozzle and the differential pressure delta Pfpv of the flowmeter 5;
step three, the electric controller 1 calculates the gear pump differential pressure Δphp by using the fuel nozzle differential pressure Δpnzl and the flowmeter 5 differential pressure Δpfpv and combining the engine combustion chamber back pressure CDP and the fuel inlet pressure P0, and the calculation formula is as follows:
；
step four, the electric controller 1 calculates the volume internal leakage flow Qleak by utilizing the gear pump differential pressure delta Php and combining the calculated internal leakage gap Aleak of the gear pump;
step five, the electric controller 1 takes the sum of the volume internal leakage flow Qleak and the volume flow command Qref as a total volume flow command Qsum, and carries out linear interpolation query according to a relation table between the volume flow and the rotating speed of the gear pump 3 to obtain a given rotating speed command omega ref;
step six, the electric controller 1 outputs a given rotating speed instruction omega ref to a motor rotating speed ring, and the rotating speed ring drives the motor 2 through the electric controller 1 after operation, so as to control the rotating speed of the gear pump 3, thereby realizing the open-loop control of the flow of the electric fuel pump.
The internal leakage clearance Aleak of the gear pump can be obtained by a calibration calculation method, when the gear pump is calibrated, the internal leakage flow Qleak of the gear pump is calculated by the difference value between the volume flow command Qref of the electric fuel pump and the actual flow Qfb, the pressure difference delta Php of the gear pump before and after the moment is tested, the internal leakage clearance Aleak of the gear pump is calculated by a flow formula, and the calculation formula is as follows:
。
it is to be understood that the above embodiments are merely illustrative of the application of the principles of the present invention, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the invention, and are also considered to be within the scope of the invention.
Claims (3)
1. An open-loop control method for the flow of an electric fuel pump is characterized in that: the method comprises the following steps:
step one, an electric controller (1) converts a received mass flow instruction Wref into a required volume flow instruction Qref according to a fuel temperature T;
step two, the electric controller (1) carries out linear interpolation inquiry according to a relation table between the calibrated volume flow to the pressure difference of the fuel nozzle (7) and the volume flow to the pressure difference of the flowmeter (5) by the volume flow command Qref to obtain the pressure difference delta Pnzl of the fuel nozzle and the pressure difference delta Pfpv of the flowmeter (5);
step three, the electric controller (1) calculates the gear pump differential pressure delta Php by utilizing the differential pressure delta Pnzl of the fuel nozzle and the differential pressure delta Pfpv of the flowmeter (5) and combining the back pressure CDP of the engine combustion chamber and the fuel inlet pressure P0, wherein the calculation formula is as follows:
；
step four, the electric controller (1) calculates the volume internal leakage flow Qleak by utilizing the gear pump differential pressure delta Php and combining the calculated internal leakage gap Aleak of the gear pump;
step five, the electric controller (1) takes the sum of the volume internal leakage flow Qleak and the volume flow instruction Qref as a total volume flow instruction Qsum, and carries out linear interpolation query according to a relation table between the volume flow and the rotating speed of the gear pump (3) to obtain a given rotating speed instruction omega ref;
step six, the electric controller (1) outputs a given rotating speed instruction omega ref to a motor rotating speed ring, and the rotating speed ring drives the motor (2) through the electric controller (1) after operation, so as to control the rotating speed of the gear pump (3), thereby realizing open-loop control of the flow of the electric fuel pump.
2. The method for open-loop control of flow rate of an electric fuel pump according to claim 1, characterized in that,
in the step 4, the internal leakage clearance Aleak of the gear pump is obtained by calibration calculation, during calibration, the internal leakage flow Qleak of the gear pump is obtained by calculation of the difference value between the volume flow command Qref of the electric fuel pump and the actual flow Qfb, the differential pressure delta Php of the gear pump before and after the moment is tested, the internal leakage clearance Aleak of the gear pump is obtained by calculation of a flow formula, and Cd is the flow systemThe number and the calculation formula are as follows:。
3. the method of open loop control of flow of an electric fuel pump of claim 1, wherein the mass flow command Wref is sent by an aircraft engine controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210371870.4A CN114718737B (en) | 2022-04-11 | 2022-04-11 | Flow open-loop control method of electric fuel pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210371870.4A CN114718737B (en) | 2022-04-11 | 2022-04-11 | Flow open-loop control method of electric fuel pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114718737A CN114718737A (en) | 2022-07-08 |
| CN114718737B true CN114718737B (en) | 2023-09-05 |
Family
ID=82241513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210371870.4A Active CN114718737B (en) | 2022-04-11 | 2022-04-11 | Flow open-loop control method of electric fuel pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114718737B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116146357B (en) * | 2023-02-27 | 2023-09-26 | 贵州航天林泉电机有限公司 | Feedforward control method of electric fuel pump |
| CN116146483B (en) * | 2023-02-27 | 2023-10-27 | 贵州航天林泉电机有限公司 | Composite control method of electric fuel pump |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4338902A (en) * | 1978-07-14 | 1982-07-13 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Fuel supplying device for internal combustion engine |
| US5042445A (en) * | 1988-09-23 | 1991-08-27 | Cummins Engine Company, Inc. | Electronic controlled fuel supply system for high pressure injector |
| JP2000045905A (en) * | 1998-07-29 | 2000-02-15 | Nippon Soken Inc | Fuel supply system for direct injection type internal combustion engine |
| GB0015063D0 (en) * | 1999-07-08 | 2000-08-09 | Moog Inc | Method and apparatus for starting a gas turbine engine |
| JP2008128125A (en) * | 2006-11-22 | 2008-06-05 | Hitachi Ltd | Fuel supply device for internal combustion engine |
| JP2012117391A (en) * | 2010-11-29 | 2012-06-21 | Ihi Corp | Fuel supply system |
| CN104948310A (en) * | 2014-03-31 | 2015-09-30 | 福特环球技术公司 | Rapid zero flow lubrication methods for a high pressure pump |
| JP2016008553A (en) * | 2014-06-25 | 2016-01-18 | スズキ株式会社 | Fuel injection control device |
| CN105422296A (en) * | 2015-12-24 | 2016-03-23 | 苏州达菲特过滤技术股份有限公司 | High-pressure common-rail fuel injection pressure control method and system |
| CN106246382A (en) * | 2015-06-08 | 2016-12-21 | 福特环球技术公司 | The method and system controlled for fuel system |
| EP3179077A1 (en) * | 2015-12-11 | 2017-06-14 | Airbus Operations, S.L. | Fuel control system for a gas turbine engine of an aircraft |
| CN107829994A (en) * | 2017-12-04 | 2018-03-23 | 昆山江锦机械有限公司 | Boat diesel engine fuel injection system test fluid power system |
| CN107917803A (en) * | 2018-01-09 | 2018-04-17 | 中科合肥微小型燃气轮机研究院有限责任公司 | A kind of fuel solenoid valve test platform and test method |
| CN209724549U (en) * | 2019-03-22 | 2019-12-03 | 潍坊辰翔动力科技有限公司 | A kind of fuel filter assembly |
| CN110850788A (en) * | 2019-12-06 | 2020-02-28 | 中国航发控制系统研究所 | Multi-electric distributed control system architecture for aircraft engine |
| CN113357189A (en) * | 2021-06-23 | 2021-09-07 | 中国航发湖南动力机械研究所 | Radial outflow impeller back cavity air-entraining structure and gas turbine engine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6712045B1 (en) * | 2002-08-08 | 2004-03-30 | Detroit Diesel Corporation | Engine control for a common rail fuel system using fuel spill determination |
| US10330023B2 (en) * | 2015-02-19 | 2019-06-25 | United Technologies Corporation | Fuel flow estimation and control system and method in a gas turbine engine |
| EP3712415B1 (en) * | 2017-11-16 | 2024-03-06 | IHI Corporation | Fuel supply control device |
| EP3763927B1 (en) * | 2018-03-08 | 2024-03-13 | Ihi Corporation | Fuel supply control device |
-
2022
- 2022-04-11 CN CN202210371870.4A patent/CN114718737B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4338902A (en) * | 1978-07-14 | 1982-07-13 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Fuel supplying device for internal combustion engine |
| US5042445A (en) * | 1988-09-23 | 1991-08-27 | Cummins Engine Company, Inc. | Electronic controlled fuel supply system for high pressure injector |
| JP2000045905A (en) * | 1998-07-29 | 2000-02-15 | Nippon Soken Inc | Fuel supply system for direct injection type internal combustion engine |
| GB0015063D0 (en) * | 1999-07-08 | 2000-08-09 | Moog Inc | Method and apparatus for starting a gas turbine engine |
| JP2008128125A (en) * | 2006-11-22 | 2008-06-05 | Hitachi Ltd | Fuel supply device for internal combustion engine |
| JP2012117391A (en) * | 2010-11-29 | 2012-06-21 | Ihi Corp | Fuel supply system |
| CN104948310A (en) * | 2014-03-31 | 2015-09-30 | 福特环球技术公司 | Rapid zero flow lubrication methods for a high pressure pump |
| JP2016008553A (en) * | 2014-06-25 | 2016-01-18 | スズキ株式会社 | Fuel injection control device |
| CN106246382A (en) * | 2015-06-08 | 2016-12-21 | 福特环球技术公司 | The method and system controlled for fuel system |
| EP3179077A1 (en) * | 2015-12-11 | 2017-06-14 | Airbus Operations, S.L. | Fuel control system for a gas turbine engine of an aircraft |
| CN105422296A (en) * | 2015-12-24 | 2016-03-23 | 苏州达菲特过滤技术股份有限公司 | High-pressure common-rail fuel injection pressure control method and system |
| CN107829994A (en) * | 2017-12-04 | 2018-03-23 | 昆山江锦机械有限公司 | Boat diesel engine fuel injection system test fluid power system |
| CN107917803A (en) * | 2018-01-09 | 2018-04-17 | 中科合肥微小型燃气轮机研究院有限责任公司 | A kind of fuel solenoid valve test platform and test method |
| CN209724549U (en) * | 2019-03-22 | 2019-12-03 | 潍坊辰翔动力科技有限公司 | A kind of fuel filter assembly |
| CN110850788A (en) * | 2019-12-06 | 2020-02-28 | 中国航发控制系统研究所 | Multi-electric distributed control system architecture for aircraft engine |
| CN113357189A (en) * | 2021-06-23 | 2021-09-07 | 中国航发湖南动力机械研究所 | Radial outflow impeller back cavity air-entraining structure and gas turbine engine |
Non-Patent Citations (1)
| Title |
|---|
| 直驱泵控电液伺服泄露补偿保压方法研究;高峰;罗莹莹;李艳;芮宏斌;周飞;;机械科学与技术(09);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114718737A (en) | 2022-07-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114718737B (en) | Flow open-loop control method of electric fuel pump | |
| JP2017096266A (en) | Method and system for improving parameter measurement | |
| CN114323667A (en) | Air compressor high-altitude environment test system and adjusting method | |
| CN111473941B (en) | Closed cycle turbine characteristic test method | |
| CN110161851B (en) | A design method of fault-tolerant controller for aviation electric fuel pump actuator | |
| CN111336019B (en) | Fuel system for a heat engine | |
| EP3620797A1 (en) | System and computer-readable storage medium for variable alignment aerodynamic probes | |
| EP3447268A1 (en) | Engine control system | |
| CN211477612U (en) | Testing system for floating thrust bearing of axial flow turbine supercharger | |
| JP5664176B2 (en) | Fuel supply system | |
| Terdich | Impact of electrically assisted turbocharging on the transient response of an off-highway diesel engine | |
| Morioka et al. | Development of the electric fuel system for the more electric engine | |
| CN210343517U (en) | Power balance control system for two sides of V-shaped gas engine | |
| CN111751078B (en) | Method for simulating turbine engine performance parameters in test and multi-electric high-temperature turbine simulator | |
| CN114961891B (en) | Method and device for measuring leakage quantity of aero-engine comb tooth sealing structure | |
| CN116146483B (en) | Composite control method of electric fuel pump | |
| CN116108633B (en) | Method for calculating air supplementing quantity of pressure oil tank of speed regulator and control flow thereof | |
| CN112610520B (en) | Method for testing mechanical performance of inert gas closed circulation radial flow impeller | |
| CN116146357B (en) | Feedforward control method of electric fuel pump | |
| CN114739677A (en) | Automatically controlled air compressor machine rack testing arrangement that economizes on fuel | |
| CN114645858A (en) | Test bench device for centrifugal compressor performance under variable engine conditions | |
| Schwarzmann et al. | Modelling of the air-system of a two-stage turbocharged passenger car diesel engine,” | |
| CN112639271A (en) | Method for calculating set position of heat engine turbocharger | |
| CN112612217B (en) | Method for modeling compressor speed of turbocharger | |
| RU2459099C1 (en) | Jet turbine engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |