CN111255578A - Device for engine double-fuel mixing and oil consumption measurement - Google Patents
Device for engine double-fuel mixing and oil consumption measurement Download PDFInfo
- Publication number
- CN111255578A CN111255578A CN202010122752.0A CN202010122752A CN111255578A CN 111255578 A CN111255578 A CN 111255578A CN 202010122752 A CN202010122752 A CN 202010122752A CN 111255578 A CN111255578 A CN 111255578A
- Authority
- CN
- China
- Prior art keywords
- oil
- fuel
- engine
- pump
- control system
- 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
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
- F02D19/081—Adjusting the fuel composition or mixing ratio; Transitioning from one fuel to the other
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0623—Failure diagnosis or prevention; Safety measures; Testing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02D19/0665—Tanks, e.g. multiple tanks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02D19/0673—Valves; Pressure or flow regulators; Mixers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/78—Direct mass flowmeters
- G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
- G01F1/84—Coriolis or gyroscopic mass flowmeters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F9/00—Measuring volume flow relative to another variable, e.g. of liquid fuel for an engine
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
-
- 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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Biomedical Technology (AREA)
- Health & Medical Sciences (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention provides a device for dual-fuel mixing and oil consumption measurement of an engine, which comprises a mixing system, an oil consumption measurement system and an electric control system, wherein the mixing system realizes the supply of two fuels in a specific proportion through two independently adjustable flow pumps, and an ultrasonic oscillation mixer is used for realizing the full mixing of the two fuels. The measuring system uses the Coriolis mass flowmeter to measure oil consumption, the main measuring oil path realizes unidirectional pressure stabilization oil supply to the engine by the pressure feedback control fuel pump, and the interference factor of the measuring precision of the mass flowmeter is eliminated by the initial oil filling and exhausting design. The invention can realize automatic preparation of the mixed fuel according to the set mixing proportion, simultaneously accurately measure the oil consumption value of the engine in real time and provide data for the performance test of the dual-fuel engine.
Description
Technical Field
The invention relates to the field of engine bench performance test equipment, in particular to a device for dual-fuel mixing and oil consumption measurement of an engine.
Background
With the exhaustion of traditional petroleum resources and the serious pollution of the atmosphere environment caused by the exhaust gas of traditional fuel engines, the application of alternative fuels to engines becomes a research focus of researchers. Methanol, ethanol, polyoxymethylene dimethyl ether (PODE), coal-based oil, biodiesel and the like are all used as alternative fuels by researchers at home and abroad for partially or completely replacing diesel oil or gasoline so as to reduce the consumption of petroleum resources, optimize in-cylinder combustion and improve pollutant emission.
In the application mode of the current alternative fuel, the diesel oil and the alternative fuel or the two alternative fuels are mixed and combusted according to a certain proportion, which is an important and simple application method. In the research of the dual-fuel blended combustion engine, researchers often need to prepare mixed fuel according to different volume proportions and respectively carry out experimental research and measurement. It is a heavy task to manually configure different proportions of fuel each time and then perform the experiment separately. Meanwhile, among performance indexes of the internal combustion engine, the fuel consumption rate is an important index for measuring the economy of the internal combustion engine, and particularly, for oxygen-containing fuels such as methanol and PODE, the mass consumption rate is significantly higher than that of diesel oil under the same power because the calorific value is low, and the consideration of the fuel consumption rate is particularly important. It is therefore desirable to ensure that this physical quantity measurement is accurate enough to accurately gauge the fuel economy of the engine.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a device for dual-fuel blending and oil consumption measurement of an engine, which can automatically configure mixed fuel with a certain volume proportion according to the set value of a rack control computer, continuously and stably supply the mixed fuel into an oil supply circulation loop of the engine, and simultaneously accurately measure the oil consumption rate of the engine in real time, thereby providing effective data support for the research of a dual-fuel blending combustion engine.
The present invention achieves the above-described object by the following technical means.
A device for dual-fuel mixing and oil consumption measurement of an engine comprises a mixing system, an oil consumption measurement system and an electric control system;
the blending system comprises a first oil tank, a second oil tank, a first oil inlet pipe, a second oil inlet pipe, a first flow pump, a second flow pump and an ultrasonic oscillation mixer, wherein the first oil tank and the second oil tank are respectively used for storing two different fuels, one end of the first oil inlet pipe and one end of the second oil inlet pipe are respectively connected with the two oil tanks in a one-to-one correspondence manner, the other ends of the first oil inlet pipe and the second oil inlet pipe are respectively connected with the ultrasonic oscillation mixer, the first flow pump is arranged on the first oil inlet pipe, and the second flow pump is arranged on the second oil inlet pipe;
the oil consumption measuring system comprises a main measuring oil path, the main measuring oil path comprises an exhaust buffer tank, a fuel pump and a mass flowmeter, the ultrasonic oscillation mixer, the exhaust buffer tank, the fuel pump and the mass flowmeter are sequentially connected, and an exhaust valve is arranged at the top of the exhaust buffer tank;
the mass flowmeter is connected with an engine oil supply circulation loop of the engine;
the electronic control system is connected with the first flow pump, the second flow pump, the ultrasonic oscillation mixer and the mass flow meter, the electronic control system controls two fuels to be mixed according to a certain volume flow rate by controlling the first flow pump, the second flow pump and the ultrasonic oscillation mixer, and the electronic control system feeds back the oil consumption value of the engine in real time according to a signal measured by the mass flow meter.
Preferably, the blending system further comprises a first electromagnetic valve and a second electromagnetic valve, the blending system further comprises a first liquid level sensor, the first liquid level sensor is installed on the ultrasonic oscillation mixer, the first electromagnetic valve, the second electromagnetic valve and the first liquid level sensor are all connected with the electric control system, and the electric control system controls the opening and closing of the first electromagnetic valve, the second electromagnetic valve and the ultrasonic oscillation mixer according to signals of the first liquid level sensor.
Preferably, the main measurement oil path further includes a first pressure sensor and a second pressure sensor, the first pressure sensor is mounted at an oil outlet of the fuel filter, the second pressure sensor is mounted at an oil inlet of the mass flow meter, and the electronic control system adjusts the input voltage of the fuel pump according to signals of the first pressure sensor and the second pressure sensor.
Preferably, a check valve is installed on a pipe between the fuel pump and the mass flow meter.
Preferably, the oil consumption measuring system further comprises an oil return path, the oil return path comprises a pressure relief oil loop, and the pressure relief oil return path is communicated to the exhaust buffer tank from an outlet of the one-way valve through a constant pressure valve.
Preferably, the oil return oil path further comprises a main oil return loop, the main oil return oil path starts from an oil return opening of an engine oil supply circulation loop and is communicated to the exhaust buffer tank through an oil return switch electromagnetic valve and a liquid level indicator, a second liquid level sensor is installed in the night vision indicator, and the second liquid level sensor is connected with the electric control system.
Preferably, the maximum fueling rates of the first and second flow pumps are each greater than the maximum fueling rate of the fuel pump.
Preferably, the mass flow meter is a coriolis mass flow meter.
The invention has the beneficial effects that:
1. the invention can accurately realize automatic oil distribution according to the set dual-fuel mixing proportion, can automatically obtain dual-fuel mixed fuel with different mixing proportions only by changing the set value on the electric control system, does not need to distribute oil in advance, and is convenient for dual-fuel engine bench experiments under different mixing proportions.
2. The invention can be applied to various dual-fuel mixed combustion experiments of the engine, in particular to a dual-fuel mixed combustion engine which is still in an early research stage, and the problem can be effectively avoided by adopting an existing preparation method during the experiment because the problems of precipitation and layering after the two fuels are mixed are not solved.
3. The invention realizes the one-way pressure-stabilizing oil supply of the oil consumption measuring oil path to the oil supply circulating oil path of the engine through the pressure feedback control, and ensures the continuity and the stability of the oil supply and the operation of the engine.
4. The Coriolis mass flowmeter is used for measuring the oil consumption, and high-precision transient direct measurement of the fuel flow can be realized. Because the device has no oil return process in the normal operation process, the device supplies oil for one-way pressure stabilization, ensures that the fuel mass flow measured by the mass flow meter is the oil consumption of the engine, effectively eliminates interference factors on the measurement precision of the mass flow meter through the exhaust design of the measurement oil way, and ensures the accuracy of the measurement result.
Drawings
Fig. 1 is a system diagram of an apparatus for dual fuel blending and oil consumption measurement of an engine according to an embodiment of the invention.
Fig. 2 is a schematic structural diagram of an apparatus for dual fuel blending and oil consumption measurement of an engine according to an embodiment of the invention.
Reference numerals:
00. the dual-fuel fixed-ratio blending and oil consumption measuring system comprises a control cabinet, a first oil tank, a second oil tank, a first flow pump, a second flow pump, a first electromagnetic valve, a second oil tank, a third oil tank, a liquid level sensor, a fourth oil tank, a sixth oil tank, a fifth oil tank, a sixth oil tank, a fifth oil tank, a sixth oil tank, a.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The following describes a device for dual-fuel blending and oil consumption measurement of an engine according to an embodiment of the invention with reference to the accompanying drawings.
Referring to fig. 1 and 2, the fuel tank of the engine includes a first fuel tank 1 and a second fuel tank 2, and the first fuel tank (1) and the second fuel tank (2) are respectively used for storing two different fuels. The device 00 for dual-fuel blending and oil consumption measurement of the engine comprises a blending system for respectively drawing two kinds of fuel from two fuel tanks and mixing the two kinds of fuel according to a given volume ratio, an oil consumption measuring system for measuring the consumption of the mixed fuel, and an electric control system for monitoring the flowing condition of the fuel in an oil way and controlling the operation of related components so as to obtain the oil consumption of the engine.
Specifically, the blending system comprises a first oil inlet pipe, a second oil inlet pipe, a first flow pump 3, a second flow pump 4, a first electromagnetic valve 5, a second electromagnetic valve 6, an ultrasonic oscillation mixer 7 and a first liquid level sensor 8, wherein the first oil inlet pipe is connected with a first oil tank 1 and the ultrasonic oscillation mixer 7, the second oil inlet pipe is connected with a second oil tank 2 and the ultrasonic oscillation mixer 7, the first flow pump 3 and the first electromagnetic valve 5 are arranged on the first oil inlet pipe, and the second flow pump 4 and the second electromagnetic valve 6 are arranged on the second oil inlet pipe. The first flow pump 3 and the second flow pump 4 are both adjustable precise flow pumps, and precise oil supply of two kinds of fuel according to different set flow rates can be respectively realized through the flow pumps under the control of an electric control system. The two fuels are respectively conveyed to an ultrasonic oscillation mixer 7 through a first electromagnetic valve 5 and a second electromagnetic valve 6 by corresponding two flow pumps, and the two fuels are mixed in the mixer.
Further, be equipped with first level sensor 8 in the suitable position in ultrasonic oscillation blender 7 upper portion, two upper and lower induction points are located to first level sensor 8, can monitor the liquid level in ultrasonic oscillation blender 7, when the fuel liquid level that gets into ultrasonic oscillation blender 7 reached upper limit, first level sensor 8 will send feedback signal to electrical system, electrical system controls two flow pump time-outs and carries out the oil transfer in to the blender afterwards, first solenoid valve 5, second solenoid valve 6 is closed simultaneously to ensure that the fuel can not flow back. The ultrasonic oscillation mixer 7 is used for carrying out oscillation mixing on two fuels input according to a given ratio and conveying the two fuels into an exhaust buffer tank 10 of a fuel consumption measuring system. When the liquid level in the mixer drops to the lower limit, the first liquid level sensor 8 sends a feedback signal to the electronic control system again, so that the electronic control system controls the first electromagnetic valve 5 and the second electromagnetic valve 6 to be opened, and the first flow pump 3 and the second flow pump 4 continue to convey oil.
Specifically, the oil consumption measuring system comprises a main measuring oil path and an oil return oil path. The main metering circuit receives the blended fuel from the blending system and feeds it to the engine oil supply circuit 22. The oil return oil way comprises a main oil return oil way and a pressure relief oil return oil way.
Specifically, the main measurement oil path comprises an exhaust buffer tank 10, the exhaust buffer tank 10 is communicated with the ultrasonic oscillation mixer 7, and an exhaust valve 9 is arranged at the top of the exhaust buffer tank and has the functions of oil storage and exhaust. The mixed fuel entering the main measuring oil path is buffered by the exhaust buffer box 10, and is pumped into the main measuring oil path by the fuel pump 13, and is input into the mass flow meter 17 through the fuel filter 11 and the check valve 14, and the fuel flows into the oil supply circulation loop 22 of the engine from the measuring system oil outlet 18 after flowing through the mass flow meter 17.
Preferably, the mass flowmeter 17 is a coriolis mass flowmeter, which is a device for directly measuring mass flow by using the principle that coriolis force proportional to mass flow is generated when fluid flows in a vibrating conduit, and is composed of a flow detection element and a transducer, so that direct and accurate transient measurement of mass flow is realized, and a flow blocking element and a movable part are not arranged in a fluid passage, so that the coriolis mass flowmeter has good application performance in the aspect of oil consumption measurement. Since the gas content in the liquid can significantly affect the measurement accuracy, it is necessary to exhaust the measurement oil path.
Further, in order to monitor the pressure change on the main measurement oil path, a first pressure sensor 12 and a second pressure sensor 16 are respectively arranged at the oil outlet of the fuel filter 11 and the oil inlet of the mass flow meter 17, the two pressure sensors feed the pressure in the oil path back to the electric control system in real time, and the electric control system adjusts the input voltage of the fuel pump 13 through the switching power supply 24 according to the feedback signal, so that the operation of the fuel pump 13 is controlled, and the pressure in the oil path is kept at a reasonable value.
Further, in order to ensure that the oil pressure of the main measurement oil line does not exceed a safety value, a pressure relief oil return line is arranged at the outlet of the one-way valve 14 and communicated with the exhaust buffer tank 10 through a constant pressure valve 15. The constant pressure valve is a normally closed valve, and is opened when and only when the pressure reaches the limit value, the oil way is abnormal in the initial oil way oil filling process and the engine operation, and the constant pressure valve 15 is opened under the condition that the pressure exceeds the safety value, so that the redundant fuel oil flows back to the exhaust buffer tank 10, and the safety of related equipment in the oil way, particularly the safety of the mass flow meter 17, is ensured.
Further, the oil is led back to the exhaust buffer tank 10 from the oil supply circulation loop through an oil return port 19, an oil return switch electromagnetic valve 20 and a liquid level indicator 21 to form a main oil return path, a second liquid level sensor is installed in the liquid level indicator 21 and connected with an electronic control system, and the oil return switch electromagnetic valve 20 is opened only when the engine initially runs and is closed in the normal running process.
It should be further explained that the corresponding functions of the blending system and the oil consumption measuring system are controlled by the electric control system. The electronic control system comprises an A/D converter 23, a switching power supply 24, a single chip microcomputer 25 and lines leading to various sensors and actuators in the device. The electric control system is connected with the rack control cabinet 01, receives a control instruction from the rack control computer, monitors the flowing condition of fuel oil in an oil way according to feedback signals of various sensors, and controls related components to operate so as to realize the function of the device; and meanwhile, the measured oil consumption result is fed back to the bench control computer, so that experimenters can accurately obtain the bench oil consumption condition of the dual-fuel engine in real time.
The device of the invention works:
for a diesel-PODE dual-fuel blended combustion engine, diesel oil is in the first oil tank 1, and PODE is in the second oil tank 2. When the engine starts to run, the electronic control system receives a control signal from the bench control cabinet 01 and a set blending ratio of diesel oil and PODE, so that the respective oil delivery flow rates of the first flow pump 3 and the second flow pump 4 are calculated. The electric control system controls the first electromagnetic valve 5 and the second electromagnetic valve 6 to be opened, the first flow pump 3 and the second flow pump 4 respectively convey two kinds of fuel, namely diesel oil and PODE (diesel oil and diesel oil) from the oil tank to an oil inlet pipeline of the blending system according to given volume flow under the control of the electric control system, and the two kinds of fuel enter the ultrasonic oscillation mixer 7 along the respective oil inlet pipelines. A first liquid level sensor 8 is arranged at a proper position on the upper part of the ultrasonic oscillation mixer 7, and sensing points are arranged at the upper proper liquid level position and the lower proper liquid level position of the inner cavity of the mixer of the first liquid level sensor 8. When the liquid level in the ultrasonic oscillation mixer 7 exceeds the upper limit, the sensor sends a feedback signal to the electric control system, the electric control system further controls the first electromagnetic valve 5 and the second electromagnetic valve 6 to be closed, and meanwhile, the first flow pump 3 and the second flow pump 4 stop supplying oil. The ultrasonic oscillation mixer 7 mixes the fuel oil by ultrasonic oscillation, and conveys the mixed fuel oil after being fully mixed to an exhaust buffer box 10 of the oil consumption measuring system. And when the liquid level measured by the first liquid level sensor 8 is lower than the lower limit, the first electromagnetic valve 5 and the second electromagnetic valve 6 are opened, and the first flow pump 3 and the second flow pump 4 respectively start oil supply again. When the device needs to stop running, the first electromagnetic valve 5 and the second electromagnetic valve 6 are closed simultaneously.
It should be noted that in the dual fuel blending and fuel consumption measuring device of the present invention, the fuel is intermittently supplied to the blending system oil path, while in the fuel consumption measuring system, the fuel flow in the main measuring oil path is continuous and stable to ensure stable oil delivery to the engine oil supply circulation loop 22 and the measurement accuracy and operation stability of the mass flow meter 17. In order to prevent the main measurement oil circuit from being lack of oil, the maximum oil supply rates of the first flow pump 3 and the second flow pump 4 are both greater than the maximum oil supply rate of the fuel pump 13, and the proper oil supply of the blending system to the oil consumption measurement system is realized through the oil cut-off mechanism.
Further, the mixed fuel from the blending system enters the fuel consumption measuring system and flows into the exhaust gas buffer tank 10. The exhaust buffer tank 10 can buffer the mixed fuel from the blending system and is supplied to the main metering oil passage by the fuel pump 13. Meanwhile, the filter screen can separate bubbles in the fuel, and gas is discharged from the exhaust valve 9 at the top, so that the measurement precision and the working stability of the system are ensured. The mixed fuel flows into the mass flow meter 17 through the fuel filter 11, the fuel pump 13, and the check valve 14 along the main measurement line, and the mass flow meter 17 measures the mass flow rate of the fuel flowing through the main measurement line.
Further, the fuel flowing out of the mass flow meter 17 flows into the engine oil supply circulation circuit 22 from the measurement system oil outlet 18. During normal operation of the engine, the electronic control system adjusts the input voltage of the fuel pump 13 through the switching power supply 24 according to the feedback signals from the first pressure sensor 12 and the second pressure sensor 16, so as to control the operation of the fuel pump 13 and ensure that the pressure in the oil path is kept at a reasonable value. Fuel in the engine fuel supply circuit 22 circulates into the engine and the engine is running consuming fuel in the fuel supply circuit. The main measuring oil circuit inputs fuel into the engine oil supply circulation loop 22 in time with proper pressure to supplement the fuel consumption in the loop and ensure the oil pressure of the oil supply circulation loop to be stable. At this time, no fuel flows back from the oil supply circulation oil path 22 of the engine through the oil return switch solenoid valve 20, so that the mass flow meter 17 arranged on the main measurement oil path can measure the mass flow of the fuel input into the oil supply circulation loop from the oil consumption measurement system in real time, namely the fuel consumption rate of the engine. The mass flow signal sent by the mass flowmeter 17 is fed back to the electric control system, and is processed by the singlechip 25 and then fed back to the rack control computer, so that the oil consumption value of the engine can be obtained.
It should be noted that the internal piping and related components of the fuel consumption measuring system are empty before the engine is started and the dual fuel blending and fuel consumption measuring device is used. Therefore, the oil consumption measuring system needs to be filled with oil for the first time, and air in the pipeline and relevant parts is discharged, so that the oil consumption measuring system can work stably and reliably. During the primary oil filling process, the electronic control system sends out control signals to open all pipelines and components simultaneously, fuel enters the exhaust buffer tank 10 from the mixing system, and then flows into the engine oil supply circulation loop 22 from the exhaust buffer tank 10 along the main measuring oil path. At this time, the fuel pump 13 is not regulated by the switching power supply, and only delivers the fuel at a relatively high flow rate. The oil return switch electromagnetic valve 20 is opened, and redundant fuel in the engine oil supply circulation loop 22 flows back to the exhaust buffer tank 10 from the main oil return oil circuit through the oil return switch electromagnetic valve 20, so that the condition of overhigh pressure in the engine oil supply circulation loop 22 is avoided, and pipelines and parts of the oil supply circulation loop and the oil consumption measurement system are flushed. When the hydraulic mirror 21 is full in the main oil return path, it can be determined that the pipeline is full of fuel and the air in the pipeline and related parts is exhausted. At this time, the second liquid level sensor in the liquid level indicator 21 sends a feedback signal to the electronic control system, the oil return switch electromagnetic valve 20 is closed, the first pressure sensor 12, the second pressure sensor 16 and the switching power supply 24 start to work, and the whole dual-fuel mixing and oil consumption measuring device enters a normal working state. At this time, the oil consumption measuring system supplies oil to the engine oil supply circulation loop 22 in a one-way stable pressure mode, and the mass flow of the mixed fuel measured by the mass flow meter 17 is the oil consumption rate of the engine.
It should be noted that, in addition to the diesel fuel and the PODE in the above embodiments, the device of the present invention can also be directly used or slightly modified for any two other fuels with mutual solubility.
The invention designs a dual-fuel fixed-ratio mixing and oil consumption measuring device by utilizing an ultrasonic oscillation mixer and a Coriolis mass flowmeter according to the requirements of a dual-fuel mixing combustion engine bench experiment. The device can automatically realize real-time fixed-ratio mixing and supply of dual fuels, does not need to distribute oil in advance, can also conveniently adjust the mixing ratio in the experiment process, and can accurately measure the oil consumption rate of the engine in real time in the running process of the engine. Through reasonable electric control feedback control and the design of air exhaust and oil return, the safe, stable and reliable work of the device is ensured. Because the main measurement oil way supplies oil to the oil supply circulation oil way of the engine in a one-way pressure-stabilizing way in the normal working process, the interference factor on the oil consumption measurement precision of the mass flowmeter is effectively eliminated, and the oil consumption measurement precision is greatly improved. The device can effectively reduce the workload of the engine dual-fuel co-combustion experimental research, and can accurately measure the fuel consumption condition of the dual fuel in real time, so that researchers can more effectively master the performances of the dual fuel engine such as economy, dynamic property and the like under different mixing proportions.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.
Claims (8)
1. A device for dual-fuel mixing and oil consumption measurement of an engine is characterized by comprising a mixing system, an oil consumption measurement system and an electric control system;
the blending system comprises a first oil tank (1), a second oil tank (2), a first oil inlet pipe, a second oil inlet pipe, a first flow pump (3), a second flow pump (4) and an ultrasonic oscillation mixer (7), wherein the first oil tank (1) and the second oil tank (2) are respectively used for storing two different fuels, one end of the first oil inlet pipe and one end of the second oil inlet pipe are respectively connected with the two oil tanks in a one-to-one correspondence manner, the other ends of the first oil inlet pipe and the second oil inlet pipe are respectively connected with the ultrasonic oscillation mixer (7), the first flow pump (3) is arranged on the first oil inlet pipe, and the second flow pump (4) is arranged on the second oil inlet pipe;
the oil consumption measuring system comprises a main measuring oil path, the main measuring oil path comprises an exhaust buffer tank (10), a fuel pump (13) and a mass flow meter (17), the ultrasonic oscillation mixer (7), the exhaust buffer tank (10), the fuel pump (13) and the mass flow meter (17) are sequentially connected, and an exhaust valve (9) is arranged at the top of the exhaust buffer tank (10);
the mass flow meter (17) is connected with an engine oil supply circulation loop (22) of the engine;
the electronic control system is connected with the first flow pump (3), the second flow pump (4), the ultrasonic oscillation mixer (7) and the mass flow meter (17), the electronic control system controls the two fuels to be mixed according to a certain volume flow rate by controlling the first flow pump (3), the second flow pump (4) and the ultrasonic oscillation mixer (7), and the electronic control system feeds back the oil consumption value of the engine in real time according to a signal measured by the mass flow meter (17).
2. The engine dual-fuel blending and oil consumption measuring device according to claim 1, characterized in that the blending system further comprises a first electromagnetic valve (5) and a second electromagnetic valve (6), the blending system further comprises a first liquid level sensor (8), the first liquid level sensor (8) is installed on the ultrasonic oscillation mixer (7), the first electromagnetic valve (5), the second electromagnetic valve (6) and the first liquid level sensor (8) are all connected with the electric control system, and the electric control system controls the opening and closing of the first electromagnetic valve (5), the second electromagnetic valve (6) and the ultrasonic oscillation mixer (7) according to a signal of the first liquid level sensor (8).
3. The engine dual-fuel blending and fuel consumption measuring device according to claim 1, characterized in that the main measuring oil circuit further comprises a first pressure sensor (12) and a second pressure sensor (16), the first pressure sensor (12) is installed at an oil outlet of the fuel filter (11), the second pressure sensor (16) is installed at an oil inlet of the mass flow meter (17), and the electronic control system adjusts the input voltage of the fuel pump (13) according to signals of the first pressure sensor (12) and the second pressure sensor (16).
4. The engine dual fuel blending and oil consumption measuring device according to claim 1, characterized in that a one-way valve (14) is installed on the pipeline between the fuel pump (13) and the mass flow meter (17).
5. The engine dual-fuel blending and oil consumption measuring device according to claim 4, characterized in that the oil consumption measuring system further comprises an oil return line, the oil return line comprises a pressure relief oil loop, and the pressure relief oil return line is communicated from an outlet of the one-way valve (14) to the exhaust buffer tank (10) through a constant pressure valve (15).
6. The engine dual-fuel blending and oil consumption measuring device according to claim 5, wherein the oil return circuit further comprises a main oil return circuit, the main oil return circuit starts from an oil return port (19) of an engine oil supply circulation circuit (22) and is communicated to the exhaust buffer tank (10) through an oil return switch electromagnetic valve (20) and a liquid level indicator (21), a second liquid level sensor is installed in the night vision mirror (21), and the second liquid level sensor is connected with the electronic control system.
7. The engine dual fuel blending and fuel consumption measurement device according to claim 1, characterized in that the maximum fueling rate of the first flow pump (3) and the second flow pump (4) are both greater than the maximum fueling rate of the fuel pump (13).
8. The engine dual fuel blending and oil consumption measuring device according to claim 1, characterized in that the mass flow meter (17) is a coriolis mass flow meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010122752.0A CN111255578A (en) | 2020-02-27 | 2020-02-27 | Device for engine double-fuel mixing and oil consumption measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010122752.0A CN111255578A (en) | 2020-02-27 | 2020-02-27 | Device for engine double-fuel mixing and oil consumption measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111255578A true CN111255578A (en) | 2020-06-09 |
Family
ID=70947509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010122752.0A Pending CN111255578A (en) | 2020-02-27 | 2020-02-27 | Device for engine double-fuel mixing and oil consumption measurement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111255578A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112169615A (en) * | 2020-09-28 | 2021-01-05 | 同济大学 | On-board double-fuel switchable biodiesel blending device |
| CN113530727A (en) * | 2021-07-20 | 2021-10-22 | 湘潭大学 | Methanol/polymethoxy dimethyl ether ultrasonic mixed combustion supply system |
-
2020
- 2020-02-27 CN CN202010122752.0A patent/CN111255578A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112169615A (en) * | 2020-09-28 | 2021-01-05 | 同济大学 | On-board double-fuel switchable biodiesel blending device |
| CN113530727A (en) * | 2021-07-20 | 2021-10-22 | 湘潭大学 | Methanol/polymethoxy dimethyl ether ultrasonic mixed combustion supply system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5708201A (en) | Fuel delivery measurement system with automatic pump matching | |
| CN111255578A (en) | Device for engine double-fuel mixing and oil consumption measurement | |
| EP2426335A1 (en) | Multi-fuel co-injection system and method for internal combustion and turbine engines | |
| CN203784021U (en) | Multifunctional comprehensive hydraulic experiment device | |
| JPS6085230A (en) | Reciprocal fuel electronic control and supply apparatus of internal combustion engine | |
| JP2016525682A (en) | Apparatus and method for continuously measuring the dynamic fuel consumption of an internal combustion engine | |
| CN201672946U (en) | Mass flow type fuel oil consumption measuring instrument | |
| CN109488466A (en) | Light fluid module for marine low-speed dual-fuel diesel engine | |
| CN211777729U (en) | Device for engine double-fuel mixing and oil consumption measurement | |
| CA2364260A1 (en) | Method and device for producing a fuel mixture for an internal combustion engine | |
| CN208040592U (en) | Boat diesel engine lighter hydrocarbons/diesel blended fuel feed system | |
| CN112882453A (en) | Fuel system flow resistance test bed based on PLC control and test method thereof | |
| CN201245630Y (en) | Gas-phase blending device for dimethyl ether and liquefied petroleum gas or natural gas | |
| CN201835962U (en) | Flow test device for spray beams of multiple specifications of engine | |
| CN201325867Y (en) | Methanol and fuel mixed filling system | |
| CN209704729U (en) | A kind of double-fuel diesel engine oil circuit improvement structure | |
| CN209083455U (en) | A kind of common rail system performance testing platform | |
| CN201364177Y (en) | Liquid pressure fuel tester | |
| CN2735786Y (en) | Feedstuff grease adding device | |
| CN2536799Y (en) | Fuel injection characteristic tester | |
| CN215408884U (en) | Oil pump liquid level detection device | |
| CN111734534A (en) | Engine fuel supply flow control system and control method thereof | |
| CN208518799U (en) | A kind of engine pedestal fuel oil on-line mixing feed system | |
| CN211777950U (en) | Portable oil pump test bench | |
| CN212320838U (en) | Tanker aircraft examination metering tank |
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 |