Fuel oil magnetizing device for direct injection compression ignition methanol machine

Abstract

The invention provides a fuel oil magnetizing device for a direct injection compression ignition methanol machine, which relates to the technical field of fuel oil modification and comprises a magnetizing device, one end of the magnetizing device is communicated with a fuel oil tank, the other end of the magnetizing device is communicated with a high-pressure oil rail, and a plurality of groups of oil injectors are arranged on the high-pressure oil rail. The magnetizing device is installed at the position close to the high-pressure oil rail, magnetized methanol can be rapidly conveyed to the oil sprayer to be sprayed and combusted, it is ensured that methanol is combusted immediately when the magnetizing effect is optimal, and therefore the combustion performance is remarkably improved; the magnetizing device can dynamically adjust the magnetic field intensity; when the spraying amount is low, a weak magnetic field is adopted to avoid excessive magnetization, and when the spraying amount is high, a strong magnetic field is provided to fully magnetize methanol and realize full utilization of the magnetic field, magnetic dipole moments of magnetized methanol molecules are rearranged, macromolecular clusters are dispersed into smaller molecular clusters, and molecular gaps are increased, so that the methanol can be fully magnetized. Oxygen and fuel are combined more sufficiently, so that the combustion efficiency is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and more particularly, to a fuel magnetization device for a direct injection compression ignition methanol engine. Background Art

[0002] In the current era background of "carbon peak and carbon neutrality", with the increasingly serious problems of energy shortage and air pollution, introducing clean alternative fuels, improving vehicle fuel efficiency and reducing tailpipe emissions have become one of the green environmental protection solutions to accelerate the transformation towards a low-carbon economic society. Methanol fuel has advantages such as cleanness, renewability and economy, and methanol engines (referred to as methanol engines for short) using methanol as fuel have thus become a current research hotspot.

[0003] According to the differences in the ignition methods of methanol engines, methanol engines can be roughly divided into spark ignition (SI) and compression ignition (CI). SI methanol engines use port injection of methanol or direct injection of methanol into the cylinder. Methanol is mixed with the intake air and forms a mixture in the cylinder, and then the mixture is ignited by a spark plug. However, methanol engines have the disadvantages of difficult cold start, high HC and CO emissions after combustion, and low thermal efficiency. CI methanol engines use direct injection into the cylinder, and the mixture of methanol and air in the cylinder is compressed until it reaches the self-ignition temperature and pressure, thus triggering combustion. Regardless of which combustion method, there are incomplete combustion and emission problems during the combustion of methanol. Methods such as optimizing the structure of the injector, adjusting the ignition timing and injection strategy can effectively improve fuel efficiency and reduce emissions. The magnetization technology is a low-cost, easy-to-implement, environmentally friendly and simple-to-operate energy-saving and emission-reduction technology, which is often used to save fuel and reduce tailpipe emissions. The magnetization fuel-saving technology uses a magnetic field to break the hydrogen bonds between fuel molecules and rearrange the molecular orientation, weaken the intermolecular force, and change the physical and chemical properties of the fuel (such as reducing the surface tension and viscosity), thereby improving fuel atomization and mixture formation and promoting more complete combustion. There have been experimental results showing that after magnetizing the fuel, the fuel combustion efficiency is improved, and the engine coking and emission conditions are improved. The fuel magnetization device is installed in the fuel tank or on the fuel pipeline. These devices process the fuel by generating a strong magnetic field, with a simple structure and convenient installation, and do not require complex modification of the existing structure. Therefore, fuel magnetization is a low-cost method to improve engine performance.

[0004] Existing direct injection compression ignition methanol engines are usually modified from diesel engines. The engine injection system uses a multi-hole injector to inject methanol, compressing the methanol and air mixture to a sufficiently high temperature and pressure, so that the mixture self-ignites and initiates the combustion process. The magnetization device mostly uses multiple permanent magnets arranged on the fuel line before the injector, or directly arranges the magnetization device inside the fuel tank. During the working process, the strong magnetic field formed between the permanent magnets reduces the attraction between methanol molecules, disperses the methanol molecular clusters and rearranges the methanol, enhancing its ability to combine with oxygen. After magnetization, the physical properties of methanol such as viscosity and surface tension change, the methanol atomization effect is improved, and the combustion is more complete, ultimately achieving methanol savings and reducing emissions. The document "Experimental Study on the Effect of Magnetic Field on Spark Ignition Engine Performance, Combustion and Emission Characteristics" publishes a magnetization device used in a four-stroke gasoline engine. The magnetization device is arranged on the fuel line between the fuel tank and the engine, with a maximum magnetic flux of 9000G.

[0005] The existing fuel magnetization devices for direct injection compression ignition methanol engines have many deficiencies in practical applications. Since methanol molecules often exist in the form of large agglomerates, the magnetic field strength of existing devices is usually low (such as less than 9000G), which makes it difficult to effectively destroy these agglomerate structures, resulting in the failure to fully disperse the magnetized fuel molecules and difficulty in significantly improving the combustion efficiency. In addition, since the magnetization device mostly uses permanent magnets for magnetization, the magnetic field strength cannot be adjusted with the changes in working conditions during operation. At low loads, the magnetic field strength is too large, resulting in excessive magnetization, and at high loads, the magnetic field strength is insufficient, resulting in incomplete magnetization. Methanol molecules that are not fully magnetized not only cannot improve the combustion performance, but may also interfere with the atomization effect of the magnetized molecules, further exacerbating the unevenness of combustion. On the other hand, the existing magnetization devices mostly use exposed permanent magnet magnets, which are easily affected by methanol corrosion or affect other devices after long-term use, reducing the service life of the device and the stability of the magnetization performance. In addition, most of these devices are of general design, and they are not fully optimized in combination with the short-chain polar molecular characteristics of methanol and the high methanol injection volume, resulting in poor adaptability to magnetic field strength and distribution, and it is difficult to meet the actual needs under different working conditions. Therefore, the existing technology is insufficient in improving combustion efficiency and stability, and it is difficult to achieve the ideal energy-saving and emission reduction effect.

[0006] Therefore, the existing methanol engine magnetization device has an unsatisfactory fuel magnetization effect due to insufficient magnetic field strength or poor magnetic field stability. At the same time, due to the relatively low calorific value of methanol, a larger injection volume is usually required to ensure the engine output power, which further puts higher requirements on the performance of the magnetization device. Therefore, it is urgent to optimize the design of the methanol engine magnetization device to achieve full magnetization of the fuel and solve the problems of insufficient magnetization effect, unstable magnetic field and poor combustion performance in the current direct injection compression ignition methanol engine, thereby significantly improving the fuel economy of the methanol engine and effectively reducing its impact on the environment. Summary of the Invention

[0007] In view of the technical problem that the existing magnetization device for methanol engines has insufficient magnetic field strength or poor magnetic field stability, resulting in unsatisfactory fuel magnetization effect, a fuel magnetization device for direct injection compression ignition methanol engines is provided. In the present invention, the main magnetization device is installed at a position close to the high-pressure oil rail, and the magnetized methanol can be quickly sent to the injector for injection and combustion, ensuring that the methanol burns immediately when the magnetization effect is optimal, thereby significantly improving the combustion performance.

[0008] The technical means adopted in the present invention are as follows:

[0009] A fuel magnetization device for direct injection compression ignition methanol engines includes a fuel tank, a magnetization device, a high-pressure oil rail, and an injector; one end of the magnetization device is communicated with the fuel tank, and the other end is communicated with the high-pressure oil rail, and multiple groups of injectors are arranged on the high-pressure oil rail.

[0010] Further, the magnetization device includes a housing, a fixing plate, an electromagnetic coil, silicon steel sheets, and a magnetic flux permeable tube;

[0011] The electromagnetic coils are vertically and uniformly distributed inside the housing, the magnetic flux permeable tubes are distributed inside the electromagnetic coils, and silicon steel sheets are arranged on the outer surface of the magnetic flux permeable tubes.

[0012] Further, the fixing plates are respectively arranged at the top and bottom inside the housing for fixing the electromagnetic coils. The fixing plates are made of insulating materials, and a silicon rubber protective layer is provided on the outer side of the fixing plates, and the protective layer is a soft and high-temperature resistant material.

[0013] Further, the housing is made of an aluminum alloy and ceramic fiber composite material, and a heat insulation coating is provided on the outer surface of the housing.

[0014] Further, silicon steel sheets are arranged on the outer surface of the magnetic flux permeable tubes arranged in parallel with the electromagnetic coils. The composite material and the silicon steel sheets jointly magnetize methanol and confine the magnetic field inside the housing.

[0015] Further, the magnetic flux permeable tube is made of polytetrafluoroethylene.

[0016] Further, the magnetic flux permeable tube has a serpentine structure inside the magnetic induction coil, and part of the flow channel axis is perpendicular to the direction of the magnetic induction lines.

[0017] Further, two groups of magnetic flux permeable tubes are distributed inside the electromagnetic coil. The inlet ends and outlet ends of the two groups of magnetic flux permeable tubes are arranged in opposite directions, and the magnetic flux permeable tubes are arranged to cross each other.

[0018] Further, both ends of the magnetic flux permeable tube pass through the housing respectively. One end of the magnetic flux permeable tube is connected to the fuel tank, and the other end is connected to the high-pressure oil rail.

[0019] Further, the electromagnetic coil is made of copper wire.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] The magnetization device of the present invention is installed at a position close to the high-pressure fuel rail, and the magnetized methanol can be quickly sent to the injector for injection and combustion, ensuring that the methanol burns immediately when the magnetization effect is optimal, thereby significantly improving the combustion performance.

[0022] By varying the magnetic field strength, the magnetization device can dynamically adjust the magnetic field strength according to different methanol injection amounts and working conditions; at low injection amounts, a weaker magnetic field is used to avoid over-magnetization, while at high injection amounts, a stronger magnetic field is provided to fully magnetize the methanol; through this dynamic adjustment mechanism, the full utilization of the magnetic field is achieved, the magnetic dipole moments of the magnetized methanol molecules are rearranged, the large molecular clusters are dispersed into smaller molecular clusters, the molecular gaps increase, and the combination of oxygen and fuel is more sufficient, thereby significantly improving the combustion efficiency. The magnetized methanol burns more fully, effectively reducing the emissions of unburned hydrocarbons (HC), carbon monoxide (CO), and other harmful gases, achieving the environmental protection goal of energy conservation and emission reduction and effectively improving the smoothness and power performance of the engine operation.

[0023] With anti-corrosion design and heat-insulating coating protection, the magnetic flux tube is not easily demagnetized under high-temperature working conditions, and the magnetic field strength is stable for a long time, ensuring the consistency and reliability of the magnetization effect.

[0024] Therefore, the magnetization device of the present invention not only significantly improves the economy and combustion stability of the methanol engine, but also solves the hazards caused by carbon deposition of hydrocarbon fuels and the emissions of formaldehyde and other harmful gases generated by incomplete combustion of methanol. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic diagram of the installation position of the magnetization device of the present invention.

[0027] Figure 2 It is a schematic cross-sectional structure diagram of the magnetization device of the present invention.

[0028] Figure 3 It is a schematic diagram of the internal pipeline layout of the housing of the magnetization device of the present invention.

[0029] Figure 4Schematic diagram of the arrangement of methanol molecules under magnetization.

[0030] Figure 5 Schematic diagram for comparing methanol spray with and without magnetization; among them, (a) is the schematic diagram of methanol spray with magnetization; (b) is the schematic diagram of methanol spray without magnetization.

[0031] In the figure: 1, fuel tank; 2, magnetization device; 21, housing; 22, fixing plate; 23, electromagnetic coil; 24, silicon steel sheet; 25, magnetic flux permeable tube; 3, high-pressure fuel rail; 4, injector. Detailed implementation manners

[0032] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0033] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The description of at least one exemplary embodiment below is actually only illustrative and in no way restrictive of the present invention and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise clearly specified in the context, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the protection scope of the present invention: the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0036] Such as Figures 1-5As shown in the figure, the present invention provides a magnetization device for a direct injection compression ignition methanol engine. The fuel magnetization device is composed of a fuel tank 1, a magnetization device 2, a high-pressure fuel rail 3, and an injector 4;

[0037] The magnetization device is composed of a housing 21, a fixing plate 22, an electromagnetic coil 23, silicon steel sheets 24, and a magnetic flux permeable tube 25;

[0038] The fixing plates 22 are arranged at the top and bottom of the housing 21. The fixing plates 22 are made of an insulating material and are attached with a silicone rubber protective layer on the outside. The protective layer is a soft and high-temperature resistant material to protect the fixed electromagnetic coil 23 from external damage;

[0039] Preferably, the material of the housing 21 is an aluminum alloy and ceramic fiber composite material, and there is a thermal insulation coating on the outside. Under the premise of a relatively light weight, the selected composite material magnetizes methanol together with the silicon steel sheets 24 and confines the magnetic field within the housing 21 as much as possible to prevent the magnetic field of the magnetization device 2 from interfering with the electromagnetic control system of the injector, resulting in instability of the fuel injection quantity, injection timing, or injection mode, and causing deterioration of the methanol combustion condition. Compared with gasoline and diesel, methanol is a short-chain polar molecule, and magnetization directly acts on the hydrogen bond; while diesel and gasoline are mostly non-polar molecules, and magnetization mainly indirectly affects through van der Waals forces or electron cloud effects. Therefore, methanol is more easily magnetized and is more sensitive to changes in the magnetic field. Due to the limitation of the installation position, the working environment of the magnetization device 2 may have a relatively high temperature. The thermal insulation coating on the outer layer of the housing 21 ensures that the magnetic field inside the housing will not fluctuate due to sudden external temperature changes; the magnetic properties of the silicon steel sheets 24 will decline at high temperatures;

[0040] Preferably, the magnetic flux permeable tube 25 is made of polytetrafluoroethylene (PTFE), which has almost no magnetism and has no obstructive effect on the passage of magnetic induction lines, and will not affect the magnetic field direction and intensity. The magnetic flux permeable tube 25 is arranged inside the electromagnetic coil 23. Since the magnetic field formed by the electromagnetic coil 23 is mainly concentrated inside the electromagnetic coil 23 and the magnetic field direction is distributed along the axial direction, the fuel flow direction should be perpendicular to the magnetic induction line direction to ensure that fuel molecules can fully cut the magnetic induction lines, thereby realizing the full magnetization of methanol. Therefore, the magnetic flux permeable tube 25 has a serpentine structure inside the magnetic induction coil 23, and the axes of some flow channels are perpendicular to the magnetic induction line direction. This arrangement can ensure the maximum contact area between the magnetic field and the fuel, thereby improving the magnetization efficiency.

[0041] To further optimize the space utilization, the magnetic flux permeable tube 25 adopts a design with simultaneous flow on both sides, such as Figure 3As shown, the two cross each other, making full use of the internal space of the electromagnetic coil. The design of increasing the flow area can effectively reduce the flow velocity of methanol in the pipe, thereby increasing the magnetization time and further improving the magnetization effect. At the pipe where the axis is perpendicular to the magnetic induction line, in order to strengthen the magnetic field intensity, silicon steel sheets 24 with the same orientation as the magnetic induction line direction are attached to the pipe to achieve the effect of increasing the magnetic flux. The relative magnetic permeability μr of the silicon steel sheets 24 is in the range of 2000 - 5000, which can make full use of the magnetic field and effectively reduce design parameters such as the number of turns and coil diameter of the required electromagnetic coil 23.

[0042] Preferably, the electromagnetic coil 23 is made of 2 - mm copper wire, which has good electrical conductivity and thermal conductivity, can safely carry a current of less than 20 A, and has a relatively low cost. It is placed inside the housing 21 and fixed on the upper and lower sides by fixing plates 22. When the electromagnetic coil 23 is energized, it will generate a certain amount of heat. This part of the heat can not only effectively heat methanol, promote the thermal motion of methanol molecules, and improve the magnetization effect, but also take away part of the heat through the flow of methanol to prevent the electromagnetic coil 23 from overheating. Through this design, while providing the magnetization effect, the electromagnetic coil 23 avoids performance degradation caused by overheating. A current protection device is provided between the electromagnetic coil 23 and the vehicle-mounted power supply to cut off the power supply in time in case of current overload, overheating or short circuit to protect the equipment. It is controlled by the vehicle-mounted ECU electronic control unit, adjusts the current according to the real-time working conditions, and controls the current protection device to cut off the power supply when an abnormality occurs to ensure the safe operation of the system.

[0043] Preferably, the best methanol injection pressure, injection timing, etc. are determined by the operating conditions of the methanol engine.

[0044] Example 1

[0045] For a direct injection compression ignition methanol engine using a magnetization device to magnetize fuel, when the magnetization device is working, methanol flows out from the fuel tank 1. At the same time, using the feedback signal of the injector 4, the magnetic field intensity is adjusted based on the real-time injection volume. The control system adjusts the current magnitude to control the magnetic field generated by the energized electromagnetic coil 23. When the methanol injection volume is small, a weaker magnetic field is used; when the injection volume is large, a stronger magnetic field is used. In addition, the concentration of emissions can be monitored in real time, and the magnetic field can be finely adjusted according to the monitoring results of emissions to optimize the combustion effect and reduce emissions.

[0046] In this embodiment, the electromagnetic coil used is made of 2-mm thick copper wire with a coil diameter of 50 mm, and a relatively safe 10-A current is provided by the vehicle-mounted power supply. The relative magnetic permeability μr of the silicon steel sheet 24 used is 2000 - 5000. Assuming the magnetic permeability is 3000, the number of coil turns is 27. The silicon steel sheet adopts an arc structure with a certain thickness and is adhered to the outer side of the pipe whose axis is perpendicular to the magnetic field direction using epoxy resin. The inner diameter of the silicon steel sheet 24 is 3.2 mm, slightly larger than the pipe diameter, and the outer diameter is 4 mm to ensure sufficient guidance of the magnetic field. The thickness of the silicon steel sheet used is 0.3 mm, and insulating coatings are applied on both sides to minimize eddy current loss as much as possible. The orientation of the silicon steel sheet 24 is parallel to the magnetic field direction, and the pipe whose axis is perpendicular to the magnetic induction line direction is covered by stacking the silicon steel sheets 24, and epoxy resin is used for bonding between adjacent silicon steels 24. According to this design, a magnetic field intensity of approximately 1 T can be formed inside the magnetic flux transmission tube 25 under the action of the silicon steel sheet 24.

[0047] When methanol enters the magnetic flux transmission tube 25 from the inlet end, it first divides into two paths and enters the internal serpentine flow channels. There are multiple pipes in the serpentine flow channels whose axes are perpendicular to the magnetic induction line direction, and methanol cuts the magnetic induction lines multiple times during the entire flow process. Through this design, the frequency of cutting the magnetic induction lines by methanol when passing through the magnetic field increases, thereby improving the magnetization effect. During this process, methanol will be magnetized by the high-intensity magnetic field. After magnetization, the magnetic dipole moments of methanol molecules will be rearranged in the direction of the applied magnetic field, and the large methanol molecular clusters will be dispersed into small methanol molecular clusters. Therefore, the intermolecular attraction decreases, the molecular arrangement becomes more dispersed, and the increase in the voids between methanol molecules facilitates the entry of oxygen, that is, enhances the ability of molecules to combine with oxygen and realizes the complete combustion of methanol. The schematic diagram of the arrangement of methanol molecules after magnetization is shown in Figure 4.

[0048] It should be noted that since the fuel used in the methanol engine is methanol and the calorific value of methanol is approximately half that of diesel, a larger methanol injection amount is required to achieve the power of the engine. The magnetic field intensity of the existing magnetization device is fixed, and in some cases, the magnetic field intensity is insufficient. Although it will also have a certain magnetization effect on methanol, methanol molecules cannot be fully magnetized, and the large molecular clusters are not completely dispersed, and the energy-saving and emission-reduction effects cannot meet the expectations. Existing literature also proposes that the magnetization effect of methanol with a low magnetic field intensity is poor.

[0049] The magnetic field intensity of the magnetization device 2 is variable and is controlled by the ECU. When abnormal fuel consumption or excessive emissions concentration is detected, the ECU can dynamically adjust the magnetic field intensity. At a current of 10 A, a magnetic field intensity of 1 T can be generated. If the magnetization effect is not ideal under high load conditions, the current is increased to enhance the magnetic field intensity to achieve full dispersion of methanol molecular clusters. After methanol flows out of the outlet end of the magnetization device 2, the external magnetic field restraint disappears, and the methanol molecules undergo a discrete effect, enabling better combination of methanol molecules with oxygen. The magnetization device 2 is located close to the high-pressure fuel rail 3, and the magnetized methanol quickly enters the injector 4 for injection. The magnetization effect does not decay before injection, and the methanol has a good ability to combine with oxygen, achieving full combustion of methanol and the effect of fuel savings and emissions reduction. After methanol is magnetized, the reduction of surface tension makes the droplets easier to atomize, forming more uniform and finer spray particles as Figure 4 shown.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fuel magnetization device for a direct injection compression ignition methanol engine, characterized in that, It includes a fuel tank (1), a magnetization device (2), a high-pressure fuel rail (3), and an injector (4); one end of the magnetization device (2) is communicated with the fuel tank (1), and the other end is communicated with the high-pressure fuel rail (3), and multiple groups of injectors (4) are arranged on the high-pressure fuel rail (3).

2. The fuel magnetization device for a direct injection compression ignition methanol engine according to claim 1, characterized in that, The magnetization device (2) includes a housing (21), a fixing plate (22), an electromagnetic coil (23), silicon steel sheets (24), and a magnetic flux permeable tube (25); The electromagnetic coils (23) are vertically and uniformly distributed inside the housing (21), the magnetic flux permeable tubes (25) are distributed inside the electromagnetic coils (23), and silicon steel sheets (24) are arranged on the outer surface of the magnetic flux permeable tubes (25).

3. The fuel magnetization device for a direct injection compression ignition methanol engine according to claim 2, characterized in that, The fixing plates (22) are respectively arranged at the top and bottom inside the housing (21) for fixing the electromagnetic coils (23). The fixing plates (22) are made of an insulating material, and a silicon rubber protective layer is provided on the outside of the fixing plates (22), and the protective layer is a soft and high-temperature resistant material.

4. The fuel magnetization device for a direct injection compression ignition methanol engine according to claim 2, characterized in that, The housing (21) is made of an aluminum alloy and ceramic fiber composite material, and a heat insulation coating is provided on the outer surface of the housing (21).

5. The fuel magnetization device for a direct injection compression ignition methanol engine according to claim 4, characterized in that, Silicon steel sheets (24) are arranged on the outer surface of the magnetic flux permeable tubes (25) arranged in parallel with the electromagnetic coils (23). The composite material and the silicon steel sheets (24) jointly magnetize methanol and confine the magnetic field inside the housing (21).

6. The fuel magnetization device for a direct injection compression ignition methanol engine according to claim 2, characterized in that, The magnetic flux permeable tube (25) is made of polytetrafluoroethylene.

7. The fuel magnetization device for a direct injection compression ignition methanol engine according to claim 2, characterized in that, The magnetic flux permeable tube (25) has a serpentine structure inside the magnetic induction coil (23), and part of the flow channel axis is perpendicular to the direction of the magnetic induction lines.

8. The fuel magnetization device for a direct injection compression ignition methanol engine according to claim 2, wherein, Two groups of magnetic flux permeable tubes (25) are distributed inside the electromagnetic coil (23). The inlet ends and outlet ends of the two groups of magnetic flux permeable tubes (25) are arranged in opposite directions, and the magnetic flux permeable tubes (25) are arranged to cross each other.

9. The fuel magnetization device for a direct injection compression ignition methanol engine according to claim 7 or 8, characterized in that, Both ends of the magnetic flux permeable tube (25) pass through the housing (21) respectively. One end of the magnetic flux permeable tube (25) is connected to the fuel tank (1), and the other end is connected to the high-pressure fuel rail (3).

10. The fuel magnetization device for a direct injection compression ignition methanol engine according to claim 2, wherein The electromagnetic coil (23) is made of copper wire.

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