A device for measuring dual fuel mixing and fuel consumption of an engine

Abstract

The present invention provides a device for engine dual-fuel blending and fuel consumption measurement, including a blending system, a fuel consumption measurement system and an electronic control system. The blending system realizes the supply of two fuels in a specific ratio through two independently adjustable flow pumps, and uses an ultrasonic oscillation mixer to achieve full mixing of the two. The measurement system uses a Coriolis mass flowmeter to measure fuel consumption, and controls the fuel pump through pressure feedback to realize the one-way stable pressure supply of fuel to the engine by the main measurement oil circuit, and eliminates the interference factors of the mass flowmeter measurement accuracy through the initial oil filling and exhaust design. The present invention can realize the automatic preparation of mixed fuel according to the set blending ratio, and at the same time, measure the fuel consumption value of the engine in real time and accurately, providing data for dual-fuel engine performance testing.

Description

Technical Field

[0001] The invention relates to the field of engine bench performance testing equipment, and in particular to a device for measuring dual-fuel blending and fuel consumption of an engine. Background Art

[0002] As traditional oil resources are increasingly depleted and the atmospheric pollution caused by exhaust gas from traditional fuel engines is becoming increasingly serious, the application of alternative fuels in engines has become a hot topic for researchers. Methanol, ethanol, polyoxymethylene dimethyl ether (PODE), coal-to-liquids, biodiesel, etc. have been used by domestic and foreign researchers as alternative fuels to partially replace or completely replace the use of diesel or gasoline to reduce the consumption of oil resources, optimize in-cylinder combustion, and improve pollutant emissions.

[0003] Among the current alternative fuel applications, diesel and an alternative fuel or two alternative fuels mixed and burned in a certain ratio is an important and simple application method. In the study of dual-fuel mixed combustion engines, researchers often need to configure mixed fuels according to different volume ratios, and conduct experimental research and measurements separately. It would be a heavy task if different proportions of fuels had to be manually configured in advance and then experiments were conducted separately. At the same time, among the performance indicators of internal combustion engines, fuel consumption rate is an important indicator to measure the economy of internal combustion engines, especially for oxygen-containing fuels such as methanol and PODE. Due to their low calorific value, their mass consumption rate is significantly greater than diesel at the same power, so the examination of their fuel consumption rate is particularly important. Therefore, it is necessary to ensure that the measurement of this physical quantity is accurate enough to accurately measure the fuel economy of the engine. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a device for engine dual-fuel blending and fuel consumption measurement, which can automatically configure a mixed fuel of a certain volume ratio according to the set value of the test bench control computer, and continuously and stably supply it to the engine fuel supply circulation loop, and at the same time can accurately and real-time measure the engine's fuel consumption rate, thereby providing effective data support for the research of dual-fuel blended combustion engines.

[0005] The present invention achieves the above technical objectives through the following technical means.

[0006] An engine dual-fuel blending and fuel consumption measurement device, comprising a blending system, a fuel consumption measurement system and an electronic control system;

[0007] The blending system comprises a first fuel tank, a second fuel tank, a first fuel inlet pipe, a second fuel inlet pipe, a first flow pump, a second flow pump and an ultrasonic oscillation mixer. The first fuel tank and the second fuel tank are respectively used to store two different fuels. One end of the first fuel inlet pipe and one end of the second fuel inlet pipe are respectively connected to the two fuel tanks in a one-to-one correspondence, and the other ends are both connected to the ultrasonic oscillation mixer. The first flow pump is arranged on the first fuel inlet pipe, and the second flow pump is arranged on the second fuel inlet pipe.

[0008] The fuel consumption measurement system comprises a main measurement oil circuit, which comprises an exhaust cache box, a fuel pump and a mass flow meter. The ultrasonic oscillator mixer, the exhaust cache box, the fuel pump and the mass flow meter are connected in sequence, and an exhaust valve is provided on the top of the exhaust cache box.

[0009] The mass flow meter is connected to an engine fuel supply circulation loop of the engine;

[0010] The electronic control system is connected to the first flow pump, the second flow pump, the ultrasonic oscillation mixer and the mass flow meter. The electronic control system controls the first flow pump, the second flow pump and the ultrasonic oscillation mixer to control the two fuels to be mixed according to a certain volume flow rate. The electronic control system provides real-time feedback of the engine's fuel consumption value based on the signal measured by the mass flow meter.

[0011] Preferably, the mixing system also includes a first solenoid valve and a second solenoid valve, and the mixing system also includes a first liquid level sensor, the first liquid level sensor is installed on the ultrasonic oscillation mixer, the first solenoid valve, the second solenoid valve and the first liquid level sensor are all connected to the electronic control system, and the electronic control system controls the opening and closing of the first solenoid valve, the second solenoid valve and the ultrasonic oscillation mixer according to the signal of the first liquid level sensor.

[0012] Preferably, the main measuring oil circuit also includes a first pressure sensor and a second pressure sensor, the first pressure sensor is installed at the oil outlet of the fuel filter, and the second pressure sensor is installed at the oil inlet of the mass flow meter, and the electronic control system adjusts the input voltage of the fuel pump according to the signals of the first pressure sensor and the second pressure sensor.

[0013] Preferably, a one-way valve is installed on the pipeline between the fuel pump and the mass flow meter.

[0014] Preferably, the fuel consumption measurement system further includes an oil return circuit, the oil return circuit includes a pressure relief oil circuit, and the pressure relief oil return circuit is connected from the one-way valve outlet to the exhaust buffer box via a constant pressure valve.

[0015] Preferably, the oil return circuit also includes a main oil return circuit, which starts from the oil return port of the engine oil supply circulation circuit, and is connected to the exhaust buffer box through the oil return switch solenoid valve and the liquid sight glass. A second liquid level sensor is installed in the night vision goggle, and the second liquid level sensor is connected to the electronic control system.

[0016] Preferably, the maximum fuel supply rates of the first flow pump and the second flow pump are both greater than the maximum fuel supply rate of the fuel pump.

[0017] Preferably, the mass flow meter is a Coriolis mass flow meter.

[0018] Beneficial effects of the present invention:

[0019] 1. The present invention can accurately realize automatic oil distribution according to the set dual-fuel blending ratio. Dual-fuel mixed fuels with different blending ratios can be automatically obtained by simply changing the set value on the electronic control system. There is no need to distribute the oil in advance, which is convenient for dual-fuel engine bench tests under different blending ratios.

[0020] 2. The present invention can be applied to various dual-fuel mixed combustion experiments of engines, especially for dual-fuel blended combustion engines that are still in the early research stage. Since the precipitation and stratification problems after the two fuels are mixed may not be solved, the method of preparing and using them immediately during the experiment can effectively avoid this problem.

[0021] 3. The present invention realizes unidirectional pressure-stabilized oil supply from the fuel consumption measurement oil circuit to the engine fuel supply circulation oil circuit through pressure feedback control, thereby ensuring the continuity and stability of the engine fuel supply and operation.

[0022] 4. The present invention uses a Coriolis mass flowmeter to measure fuel consumption, which can achieve high-precision, transient direct measurement of fuel flow. Since there is no oil return process during normal operation of the device, it is a one-way stable pressure supply, ensuring that the fuel mass flow measured by the mass flowmeter is the fuel consumption of the engine. Through the exhaust design of the measuring oil circuit, the interference factors for the measurement accuracy of the mass flowmeter are effectively eliminated, ensuring the accuracy of the measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of a system of an apparatus for engine dual-fuel blending and fuel consumption measurement according to an embodiment of the present invention.

[0024] Figure 2 Schematic diagram of the structure of a device for engine dual-fuel blending and fuel consumption measurement according to an embodiment of the present invention.

[0025] Reference numerals:

[0026] 00. Dual-fuel constant ratio blending and fuel consumption measurement system, 01. Control cabinet, 1. First fuel tank, 2. Second fuel tank, 3. First flow pump, 4. Second flow pump, 5. First solenoid valve, 6. Second solenoid valve, 7. Ultrasonic oscillation mixer, 8. Liquid level sensor, 9. Exhaust valve, 10. Exhaust buffer box, 11. Fuel filter, 12. First pressure sensor, 13. Fuel pump, 14. Check valve, 15. Constant pressure valve, 16. Second pressure sensor, 17. Mass flow meter, 18. Measurement system oil outlet, 19. Return oil port, 20. Return oil switch solenoid valve, 21. Night vision goggles, 22. Engine fuel supply circulation loop, 23. A / D converter, 24. Switching power supply, 25. Single chip microcomputer. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Firstly, a device for engine dual-fuel blending and fuel consumption measurement according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] See also Figure 1 and Figure 2The fuel tank of the engine includes a first fuel tank 1 and a second fuel tank 2, wherein the first fuel tank (1) and the second fuel tank (2) are respectively used to store two different fuels. According to an embodiment of the present invention, an engine dual-fuel blending and fuel consumption measurement device 00 includes a blending system for extracting two fuels from two fuel tanks and mixing them in a given volume ratio, a fuel consumption measurement system for measuring the consumption of the mixed fuel, and an electronic control system for monitoring the flow of fuel in the oil circuit and controlling the operation of related components to obtain the fuel consumption of the engine.

[0032] Specifically, the blending system includes a first oil inlet pipe, a second oil inlet pipe, a first flow pump 3, a second flow pump 4, a first solenoid valve 5, a second solenoid valve 6, an ultrasonic oscillation mixer 7, and a first liquid level sensor 8. The first oil inlet pipe connects the first oil tank 1 and the ultrasonic oscillation mixer 7, the second oil inlet pipe connects the second oil tank 2 and the ultrasonic oscillation mixer 7, the first flow pump 3 and the first solenoid valve 5 are arranged on the first oil inlet pipe, and the second flow pump 4 and the second solenoid valve 6 are arranged on the second oil inlet pipe. Both the first flow pump 3 and the second flow pump 4 are adjustable precision flow pumps, through which the two fuels can be accurately supplied at different set flow rates under the control of the electronic control system. The two fuels are transported to the ultrasonic oscillation mixer 7 by the corresponding two flow pumps through the first solenoid valve 5 and the second solenoid valve 6, respectively, to achieve the mixing of the two fuels in the mixer.

[0033] Furthermore, a first liquid level sensor 8 is provided at a suitable position on the upper part of the ultrasonic oscillation mixer 7. The first liquid level sensor 8 has two upper and lower sensing points, which can monitor the liquid level in the ultrasonic oscillation mixer 7. When the liquid level of the fuel entering the ultrasonic oscillation mixer 7 reaches the upper limit, the first liquid level sensor 8 will send a feedback signal to the electronic control system, and then the electronic control system controls the two flow pumps to stop delivering oil to the mixer, and at the same time, the first solenoid valve 5 and the second solenoid valve 6 are closed to ensure that the fuel does not flow back. The ultrasonic oscillation mixer 7 oscillates and mixes the two fuels input in a given ratio, and delivers them to the exhaust buffer box 10 of the fuel consumption measurement system. When the liquid level in the mixer drops to the lower limit, the first liquid level sensor 8 will send a feedback signal to the electronic control system again, so that the electronic control system controls the first solenoid valve 5 and the second solenoid valve 6 to open, and the first flow pump 3 and the second flow pump 4 continue to deliver oil.

[0034] Specifically, the fuel consumption measurement system includes a main measurement oil circuit and a return oil circuit. The main measurement oil circuit receives mixed fuel from the blending system and supplies it to the engine fuel supply circulation circuit 22. The return oil circuit includes a main return oil circuit and a pressure relief return oil circuit.

[0035] Specifically, the main measurement oil circuit includes an exhaust cache box 10, which is connected to the ultrasonic oscillation mixer 7, and is provided with an exhaust valve 9 on the top thereof, which has the functions of storing oil and exhausting gas. The mixed fuel entering the main measurement oil circuit is cached by the exhaust cache box 10, and the fuel is pumped into the main measurement oil circuit by the fuel pump 13, and is input into the mass flow meter 17 through the fuel filter 11 and the one-way valve 14. After the fuel flows through the mass flow meter 17, it flows into the fuel supply circulation loop 22 of the engine through the oil outlet 18 of the measurement system.

[0036] Preferably, the mass flowmeter 17 is a Coriolis mass flowmeter, which is a device that directly measures the mass flow rate by using the principle that the Coriolis force generated when the fluid flows in the vibrating pipe is proportional to the mass flow rate. It is composed of a flow detection element and a converter, and realizes direct and accurate transient measurement of the mass flow rate. There are no obstruction elements and movable parts in the fluid channel, and it has good application performance in fuel consumption measurement. Since the gas content in the liquid will significantly affect its measurement accuracy, it is very necessary to measure the exhaust of the oil circuit.

[0037] Furthermore, in order to monitor the pressure changes in the main measuring oil circuit, a first pressure sensor 12 and a second pressure sensor 16 are respectively provided at the oil outlet of the fuel filter 11 and the oil inlet of the mass flow meter 17. The two pressure sensors feed back the pressure in the oil circuit to the electronic control system in real time. The electronic control system adjusts the input voltage of the fuel pump 13 through the switching power supply 24 according to the feedback signal, thereby controlling the operation of the fuel pump 13 to ensure that the pressure in the oil circuit is maintained at a reasonable value.

[0038] Furthermore, in order to ensure that the oil pressure in the main measuring oil circuit does not exceed the safety value, a pressure relief return oil circuit is provided at the outlet of the one-way valve 14, and the pressure relief return oil circuit is connected to the exhaust cache box 10 through the constant pressure valve 15. The constant pressure valve is a normally closed valve, which opens only when the pressure reaches the limit value. During the initial oil circuit filling process and when the oil circuit is abnormal during engine operation, if the pressure exceeds the safety value, the constant pressure valve 15 will open to return the excess fuel to the exhaust cache box 10, thereby ensuring the safety of related equipment in the oil circuit, especially the safety of the mass flow meter 17.

[0039] Furthermore, the oil supply circulation loop is returned to the exhaust buffer box 10 through the oil return port 19, the oil return switch solenoid valve 20, and the liquid sight glass 21, forming a main oil return oil circuit. A second liquid level sensor is installed in the liquid sight glass 21, and the second liquid level sensor is connected to the electronic control system. The oil return switch solenoid valve 20 is only opened when the engine is initially running, and is closed during normal operation.

[0040] It should be further explained that the corresponding functions of the blending system and the fuel consumption measurement system are all controlled and realized by the electronic control system. The electronic control system includes 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 electronic control system is connected to the test bench control cabinet 01, receives control instructions from the test bench control computer, and monitors the flow of fuel in the oil circuit according to the feedback signals of various sensors, controls the operation of related components, and realizes the function of the device; at the same time, the measured fuel consumption results are fed back to the test bench control computer, so that the experimenter can obtain the test bench fuel consumption of the dual-fuel engine in real time and accurately.

[0041] The working process of the device of the present invention is as follows:

[0042] For a diesel-PODE dual fuel blended combustion engine, the first tank 1 contains diesel and the second tank 2 contains PODE. When the engine starts to start, the electronic control system receives the control signal from the bench control cabinet 01 and the set blending ratio of diesel and PODE, thereby calculating the respective oil delivery flow of the first flow pump 3 and the second flow pump 4. The electronic control system controls the first solenoid valve 5 and the second solenoid valve 6 to open. Under the control of the electronic control system, the first flow pump 3 and the second flow pump 4 respectively deliver diesel and PODE from the tank to the oil inlet pipeline of the blending system according to the given volume flow, and the two fuels enter the ultrasonic oscillation mixer 7 along their respective oil inlet pipelines. A first liquid level sensor 8 is installed at a suitable position on the upper part of the ultrasonic oscillation mixer 7, and the first liquid level sensor 8 is provided with sensing points at two suitable liquid level positions above and below the inner cavity of the mixer. When the liquid level in the ultrasonic oscillation mixer 7 exceeds the upper limit, the sensor will send a feedback signal to the electronic control system, and the electronic control system will then control the first solenoid valve 5 and the second solenoid valve 6 to close, and at the same time, the first flow pump 3 and the second flow pump 4 stop supplying oil. The ultrasonic oscillating mixer 7 uses ultrasonic oscillation to mix the fuel and delivers the fully mixed mixed fuel to the exhaust buffer box 10 of the fuel consumption measurement system. When the liquid level measured by the first liquid level sensor 8 is lower than the lower limit, the first solenoid valve 5 and the second solenoid valve 6 are opened, and the first flow pump 3 and the second flow pump 4 also start to supply fuel again. When the device needs to stop running, the first solenoid valve 5 and the second solenoid valve 6 are closed at the same time.

[0043] It should be noted that in the dual-fuel blending and fuel consumption measurement device of the present invention, the supply of fuel in the blending system oil circuit is intermittent, while in the fuel consumption measurement system, the flow of fuel in the main measurement oil circuit is continuous and stable, so as to ensure the stable oil supply to the engine fuel supply circulation circuit 22, as well as the measurement accuracy and working stability of the mass flow meter 17. In order to prevent the main measurement oil circuit from being short of oil, the maximum oil supply rate 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 blending system is used to supply the fuel consumption measurement system with an appropriate amount of oil through the above-mentioned oil cut-off mechanism.

[0044] Furthermore, the mixed fuel from the blending system enters the fuel consumption measurement system and flows into the exhaust buffer box 10. The exhaust buffer box 10 can buffer the mixed fuel from the blending system and supply it to the main measurement oil circuit through the fuel pump 13. At the same time, it can also separate the bubbles in the fuel through the filter and discharge the gas from the exhaust valve 9 at the top to ensure the measurement accuracy and working stability of the system. The mixed fuel flows into the mass flowmeter 17 along the main measurement oil circuit through the fuel filter 11, the fuel pump 13, and the one-way valve 14, and the mass flowmeter 17 measures the mass flow of the fuel flowing through the main measurement oil circuit.

[0045] Furthermore, the fuel flowing out of the mass flow meter 17 flows into the engine fuel supply circulation loop 22 from the measuring system oil outlet 18. During the normal operation of the engine, the electronic control system adjusts the input voltage of the fuel pump 13 through the switch power supply 24 according to the feedback signal from the first pressure sensor 12 and the second pressure sensor 16, thereby controlling the operation of the fuel pump 13 and ensuring that the pressure in the oil circuit is maintained at a reasonable value. The fuel in the engine fuel supply circulation loop 22 circulates into the engine, and the engine continuously consumes the fuel in the fuel supply circulation loop during operation. The main measuring oil circuit timely inputs the fuel into the engine fuel supply circulation loop 22 at an appropriate pressure to supplement the fuel consumption in the circuit and ensure the stability of the oil pressure of the fuel supply circulation loop. At this time, no fuel will flow back from the engine fuel supply circulation oil circuit 22 through the return oil switch solenoid valve 20, so the mass flow meter 17 arranged in the main measuring oil circuit can measure the fuel mass flow rate input from the fuel consumption measurement system into the fuel supply circulation loop in real time, which is the fuel consumption rate of the engine. The mass flow signal sent by the mass flow meter 17 is fed back to the electronic control system, and after being processed by the single chip microcomputer 25, it is fed back to the test bench control computer to obtain the fuel consumption value of the engine.

[0046] It should be noted that before the engine is started and the dual fuel blending and fuel consumption measurement device is used, the internal pipelines and related components of the fuel consumption measurement system are empty. Therefore, it is necessary to perform the initial oil filling of the fuel consumption measurement system to discharge the air inside the pipelines and related components to ensure that the fuel consumption measurement system can work stably and reliably. During the initial oil filling process, the electronic control system sends a control signal to open each pipeline and component at the same time, and the fuel enters the exhaust buffer box 10 from the blending system, and then flows from the exhaust buffer box 10 along the main measurement oil circuit into the engine fuel supply circulation loop 22. At this time, the fuel pump 13 is not regulated by the switching power supply and only delivers oil at a higher flow rate. The return oil switch solenoid valve 20 is opened, and the excess fuel in the engine fuel supply circulation loop 22 will flow back to the exhaust buffer box 10 from the main return oil circuit through the return oil switch solenoid valve 20, avoiding the situation of excessive pressure in the engine fuel supply circulation loop 22, and realizing the flushing of the fuel supply circulation loop and the pipelines and components of the fuel consumption measurement system. When the sight glass 21 in the main oil return line is full, it can be determined that the pipeline has been filled with fuel, and the air in the pipeline and related components has been exhausted. At this time, the second liquid level sensor in the sight glass 21 sends a feedback signal to the electronic control system, the oil return switch solenoid valve 20 is closed, the first pressure sensor 12 and the second pressure sensor 16 and the switch power supply 24 start working, and the entire dual-fuel blending and fuel consumption measurement device enters a normal working state. At this time, the fuel consumption measurement system is a one-way regulated pressure supply for the engine fuel supply circulation loop 22, and the mass flow of the mixed fuel measured from the mass flow meter 17 is the fuel consumption rate of the engine.

[0047] It should be particularly noted that, in addition to diesel and PODE in the above embodiments, the device of the present invention can also be directly used or slightly modified to be used for any other two miscible fuels.

[0048] Aiming at the needs of the bench experiment of the dual-fuel blending combustion engine, the present invention designs a dual-fuel fixed-ratio blending and fuel consumption measurement device by using an ultrasonic oscillating mixer and a Coriolis mass flowmeter. The device can automatically realize the real-time fixed-ratio blending and supply of dual fuels, without the need for advance oil distribution, and can also easily adjust the blending ratio during the experiment. At the same time, the fuel consumption rate of the engine can be measured in real time and accurately during the operation of the engine. Through reasonable electronic control feedback control, as well as exhaust and oil return design, the safe, stable and reliable operation of the device is guaranteed. Since the main measurement oil circuit is a unidirectional pressure-stabilized oil supply to the engine oil supply circulation oil circuit during normal operation, the interference factors for the fuel consumption measurement accuracy of the mass flowmeter are effectively eliminated, and the fuel consumption measurement accuracy is greatly improved. This device can effectively reduce the workload of the engine dual-fuel blending experiment research, and can accurately and real-time measure the fuel consumption of dual fuels, so that researchers can more effectively grasp the economy, power and other performances of dual-fuel engines under different blending ratios.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0050] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. A device for engine dual fuel blending and fuel consumption measurement, characterized in that: Including blending system, fuel consumption measurement system and electronic 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); the first oil tank (1) and the second oil tank (2) are respectively used to store two different fuels; one end of the first oil inlet pipe and one end of the second oil inlet pipe are respectively connected to the two oil tanks in a one-to-one correspondence, and the other ends are both connected to 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 fuel consumption measurement system comprises a main measurement oil circuit, which comprises an exhaust cache box (10), a fuel pump (13) and a mass flow meter (17); a one-way valve (14) is installed on the pipeline between the fuel pump (13) and the mass flow meter (17); the ultrasonic oscillating mixer (7), the exhaust cache box (10), the fuel pump (13) and the mass flow meter (17) are connected in sequence; an exhaust valve (9) is provided on the top of the exhaust cache box (10); and 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); The fuel consumption measurement system further comprises an oil return circuit, the oil return circuit comprising a pressure relief oil return circuit, the pressure relief oil return circuit being connected from the outlet of the one-way valve (14) through a constant pressure valve (15) to the exhaust cache box (10); the oil return circuit further comprises a main oil return circuit, the main oil return circuit starting from the oil return port (19) of the engine oil supply circulation circuit (22), being connected to the exhaust cache box (10) through an oil return switch solenoid valve (20) and a liquid sight glass (21), a second liquid level sensor being installed in the liquid sight glass (21), the second liquid level sensor being connected to the electronic control system; The mass flow meter (17) is connected to an engine oil supply circulation circuit (22) of the engine; The electronic control system is connected to 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 first flow pump (3), the second flow pump (4) and the ultrasonic oscillation mixer (7) to control the two fuels to be mixed at a certain volume flow rate. The electronic control system feeds back the fuel consumption value of the engine in real time based on the signal measured by the mass flow meter (17).

2. The device for engine dual fuel blending and fuel consumption measurement according to claim 1, characterized in that: The mixing system further comprises a first solenoid valve (5) and a second solenoid valve (6), and the mixing system further comprises a first liquid level sensor (8), wherein the first liquid level sensor (8) is mounted on the ultrasonic oscillation mixer (7), and the first solenoid valve (5), the second solenoid valve (6) and the first liquid level sensor (8) are all connected to the electronic control system, and the electronic control system controls the opening and closing of the first solenoid valve (5), the second solenoid valve (6) and the ultrasonic oscillation mixer (7) according to a signal from the first liquid level sensor (8).

3. The device for engine dual fuel blending and fuel consumption measurement 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 mounted at the oil outlet of the fuel filter (11), and the second pressure sensor (16) is mounted at the oil inlet of the mass flow meter (17); the electronic control system adjusts the input voltage of the fuel pump (13) according to the signals of the first pressure sensor (12) and the second pressure sensor (16).

4. The device for engine dual fuel blending and fuel consumption measurement according to claim 1, characterized in that: The mass flow meter (17) is a Coriolis mass flow meter.

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