Direct injection methanol engine and vehicle with same

Abstract

The invention discloses a direct injection methanol engine and a vehicle with the same. The plurality of fuel injectors are in one-to-one correspondence with the plurality of air cylinders and are used for conveying methanol fuel to the corresponding air cylinders; the heating assembly is used for heating methanol fuel conveyed to the corresponding air cylinder by the fuel injector; the multiple temperature sensors are used for detecting the temperature of methanol fuel conveyed by the corresponding fuel injectors, and the controller is used for controlling the power of the heating assembly according to temperature information of the methanol fuel. By arranging the heating assembly, the temperature sensor and the controller, methanol fuel injected by the fuel injector can be heated, the temperature of the injected methanol fuel can be accurately detected in real time, and the controller can control the power of the heating assembly so as to control the methanol fuel heating capacity of the heating assembly; therefore, the temperature of the methanol fuel conveyed into the air cylinder can be closer to the preset temperature, the problem of cold start of the in-cylinder direct injection methanol engine can be solved, and the reliability and the application prospect of the in-cylinder direct injection methanol engine are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to an in-cylinder direct injection methanol engine and a vehicle having the same. Background Art

[0002] In related technologies, methanol is a clean energy source, and its emissions of hydrocarbons, nitrogen oxides and particulate matter in combustion exhaust gas are significantly lower than those of traditional petrochemical fuels such as gasoline and diesel. The development prospects of methanol engines are broad. However, the cold start of methanol engines is relatively difficult, which affects the reliability and application prospects of methanol engines. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide an in-cylinder direct injection methanol engine, which can heat the methanol fuel injected by the fuel injector and detect the temperature of the injected methanol fuel in real time and accurately, thereby solving the problem of cold start of the in-cylinder direct injection methanol engine.

[0004] The present invention further proposes a vehicle having the above-mentioned in-cylinder direct injection methanol engine.

[0005] According to an embodiment of the present invention, the in-cylinder direct injection methanol engine includes: an engine body, the engine body defines a plurality of cylinders; a fuel tank, the fuel tank storing methanol fuel; a fuel pump and a plurality of fuel injectors, the fuel pump is connected between the fuel tank and the fuel injectors for conveying the methanol fuel in the fuel tank toward the fuel injectors, the plurality of fuel injectors correspond one-to-one to the plurality of cylinders, and the plurality of fuel injectors are used to convey the methanol fuel to the corresponding cylinders; a heating assembly, the heating assembly is provided at the plurality of fuel injectors and is used to heat the methanol fuel conveyed by the fuel injectors to the corresponding cylinders; a controller and a plurality of temperature sensors, the plurality of temperature sensors are separately provided at the plurality of fuel injectors and are used to detect the temperature of the methanol fuel conveyed by the corresponding fuel injectors, the controller is connected to the plurality of temperature sensors and the heating assembly and is constructed to control the power of the heating assembly according to the temperature information of the methanol fuel.

[0006] According to the in-cylinder direct injection methanol engine of an embodiment of the present invention, by providing a heating component, a temperature sensor and a controller, the methanol fuel injected by the fuel injector can be heated and the temperature of the injected methanol fuel can be detected in real time and accurately. The controller can control the power of the heating component to control the ability of the heating component to heat the methanol fuel so that the temperature of the methanol fuel delivered to the cylinder can be closer to the preset temperature, thereby solving the problem of cold start of the in-cylinder direct injection methanol engine and improving the reliability and application prospects of the in-cylinder direct injection methanol engine.

[0007] In some embodiments of the present invention, the heating assembly comprises: a plurality of sub-heating elements, and the plurality of sub-heating elements correspond one-to-one to the plurality of fuel injectors.

[0008] In some embodiments of the present invention, the sub-heating element includes: an electric heating wire, and the electric heating wire surrounds the corresponding fuel injector.

[0009] In some embodiments of the present invention, the sub-heating element further includes: a mounting shell, the mounting shell is sleeved on the corresponding fuel injector and defines an accommodating cavity, the electric heating wire is arranged in the accommodating cavity and around the inner wall of the accommodating cavity.

[0010] In some embodiments of the present invention, the in-cylinder direct injection methanol engine further comprises: a power supply component, wherein the power supply component is connected to the electric heating wire.

[0011] In some embodiments of the present invention, the power supply includes: a motor and / or an energy storage battery.

[0012] In some embodiments of the present invention, the heating assembly further includes: a PTC heating plate, the sub-heating element includes: a mounting shell, the mounting shell is sleeved on the corresponding fuel injector and defines a accommodating cavity, and the PTC heating plate and the accommodating cavity form a medium circulation loop.

[0013] In some embodiments of the present invention, the methanol direct injection engine further comprises: a fuel rail, the plurality of fuel injectors are arranged on the fuel rail, and the fuel pump is connected between the fuel tank and the fuel rail to transport the methanol fuel in the fuel tank to the fuel rail.

[0014] In some embodiments of the present invention, the in-cylinder direct injection methanol engine further includes a pressure sensor, which is arranged on the fuel rail and is used to detect the pressure of the methanol fuel in the fuel rail, and the controller is connected to the pressure sensor and the fuel pump and is configured to control the power of the fuel pump according to the pressure information of the methanol fuel.

[0015] A vehicle according to an embodiment of the present invention includes the above-mentioned in-cylinder direct injection methanol engine.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is a schematic diagram of an in-cylinder direct injection methanol engine according to an embodiment of the present invention;

[0019] Figure 2 is a schematic diagram of a fuel injector according to an embodiment of the present invention.

[0020] Reference numerals:

[0021] Fuel tank 1; Fuel pump 2;

[0022] Fuel injector 3; nozzle 31; mounting plate 32;

[0023] Sub-heating element 41; mounting shell 411; accommodating cavity 412; power supply element 42;

[0024] Temperature sensor 5; fuel rail 6; controller 7;

[0025] A methanol direct injection engine 100. DETAILED DESCRIPTION

[0026] 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] Reference below Figure 1 and Figure 2 A methanol direct injection engine 100 and a vehicle having the same according to an embodiment of the present invention are described.

[0028] like Figure 1 and Figure 2As shown, the in-cylinder direct injection methanol engine 100 according to an embodiment of the present invention includes: an engine body, a fuel tank 1, a fuel pump 2, a plurality of fuel injectors 3, a heating assembly, a controller 7 and a plurality of temperature sensors 5, the engine body defines a plurality of cylinders, methanol fuel is stored in the fuel tank 1, the fuel pump 2 is connected between the fuel tank 1 and the fuel injectors 3 for conveying the methanol fuel in the fuel tank 1 toward the fuel injectors 3, the plurality of fuel injectors 3 correspond one-to-one to the plurality of cylinders, the plurality of fuel injectors 3 are used to convey the methanol fuel to the corresponding cylinders, the heating assembly is provided at the plurality of fuel injectors 3 and is used to heat the methanol fuel conveyed by the fuel injectors 3 to the corresponding cylinders, the plurality of temperature sensors 5 are separately provided at the plurality of fuel injectors 3 and are used to detect the temperature of the methanol fuel conveyed by the corresponding fuel injectors 3, the controller 7 is connected to the plurality of temperature sensors 5 and the heating assembly and is constructed to control the power of the heating assembly according to the temperature information of the methanol fuel.

[0029] Among them, the in-cylinder direct injection methanol engine 100 uses methanol as fuel, and methanol can be stored in the fuel tank 1 of the in-cylinder direct injection methanol engine 100. The fuel pump 2 of the in-cylinder direct injection methanol engine 100 can transport the methanol fuel into multiple fuel injectors 3 of the in-cylinder direct injection methanol engine 100. The fuel pump 2 can increase the pressure of the methanol fuel to a preset pressure value. The engine body of the in-cylinder direct injection methanol engine 100 defines multiple cylinders, and the multiple fuel injectors 3 correspond to the multiple cylinders one by one. The multiple fuel injectors 3 can all transport methanol to the corresponding cylinders in a timely and quantitative manner. The multiple fuel injectors 3 can all have nozzles 31. The heating component of the in-cylinder direct injection methanol engine 100 can be arranged at the nozzle 31 of the fuel injector 3. The heating component is used to heat the methanol fuel in the fuel injector 3 so that the methanol fuel transported to the in-cylinder direct injection methanol engine 100 by the fuel injector 3 can reach a preset temperature, so as to achieve the effect of solving the difficulty of cold starting of the in-cylinder direct injection methanol engine 100.

[0030] It can be understood that the heating component can increase the temperature of the methanol fuel to accelerate the evaporation rate of the methanol fuel to achieve better evaporation and atomization effects, and can reduce the amount of wall collision to make the methanol fuel easier to burn to improve the thermal efficiency of the methanol fuel.

[0031] The multiple temperature sensors 5 of the direct-injection methanol engine 100 can be respectively arranged at the nozzles 31 of the multiple fuel injectors 3. The temperature sensors 5 are used to detect the temperature of the methanol fuel delivered to the direct-injection methanol engine 100 by the corresponding fuel injectors 3. The temperature sensor 5 can transmit the temperature information of the methanol fuel at the nozzle 31 to the controller 7. The controller 7 can be integrated into the vehicle controller, or the controller 7 can be the controller of the direct-injection methanol engine 100.

[0032] The controller 7 is connected to multiple temperature sensors 5 and heating components. The controller 7 is used to control the power of the heating component according to the temperature information of the methanol fuel. When the temperature of the methanol fuel at the nozzle 31 is significantly lower than the preset temperature, the controller 7 can control the heating component of the direct-injection methanol engine 100 to increase the power of the heating component to increase the temperature of the methanol fuel at the nozzle 31 more quickly. When the temperature of the methanol fuel at the nozzle 31 is lower than the preset temperature but the difference is not large, the controller 7 can control the heating component of the direct-injection methanol engine 100 to reduce the power of the heating component to reduce the heating capacity of the methanol fuel at the nozzle 31 so that the temperature of the methanol fuel at the nozzle 31 rises relatively slowly. When the temperature of the methanol fuel at the nozzle 31 is higher than the preset temperature, the controller 7 can control the heating component of the direct-injection methanol engine 100 to reduce the power of the heating component or directly turn off the heating component to slow down the heating capacity of the methanol fuel at the nozzle 31 or temporarily stop heating. Such a configuration can accurately control the temperature of the methanol fuel delivered by the fuel injector 3 to the in-cylinder direct injection methanol engine 100, so as to achieve the effect of solving the cold start problem of the in-cylinder direct injection methanol engine 100.

[0033] In addition, by arranging the temperature sensor 5 and the heating component at the nozzle 31 of the fuel injector 3, the heat of the heating component can be better transferred to the methanol fuel at the nozzle 31, which can improve the energy utilization rate. It can be understood that if the location of the heating component is far away from the nozzle 31, the methanol fuel needs to flow through a long distance after passing through the heating component to reach the nozzle 31. In this process, the heat will be lost, so the heating component is required to heat the methanol fuel to a higher temperature to offset this part of the loss, resulting in energy waste. In addition, the temperature detected by the temperature sensor 5 can be made closer to the temperature of the methanol fuel delivered to the direct injection methanol engine 100 by the fuel injector 3, so as to further accurately control the temperature of the methanol fuel delivered to the direct injection methanol engine 100 by the fuel injector 3, so as to better solve the cold start problem of the direct injection methanol engine 100.

[0034] In the above embodiment, by setting a heating component, a temperature sensor 5 and a controller 7, the methanol fuel injected by the fuel injector 3 can be heated and the temperature of the injected methanol fuel can be detected in real time and accurately. The controller 7 can control the power of the heating component to control the ability of the heating component to heat the methanol fuel so that the temperature of the methanol fuel delivered to the cylinder can be closer to the preset temperature, thereby solving the problem of cold start of the direct injection methanol engine 100 and improving the reliability and application prospects of the direct injection methanol engine 100.

[0035] In some embodiments of the present invention, Figure 2As shown, the heating assembly includes: a plurality of sub-heating elements 41 , and the plurality of sub-heating elements 41 correspond to the plurality of fuel injectors 3 one by one.

[0036] Among them, the heating component may include multiple sub-heating elements 41, the number of which may be but not limited to four, six, eight, etc., and the multiple sub-heating elements 41 may correspond one-to-one to the multiple fuel injectors 3. The multiple sub-heating elements 41 may be used to heat the corresponding fuel injectors 3 to increase the temperature of the methanol fuel in the corresponding fuel injectors 3, so that the temperature of the methanol fuel in the fuel injectors 3 can be close to the preset temperature, thereby solving the problem of cold start of the in-cylinder direct injection methanol engine 100.

[0037] At the same time, by arranging an independent sub-heating element 41 on each fuel injector 3, the corresponding sub-heating element 41 can be accurately controlled according to the methanol fuel in each fuel injector 3, so that the degree of heating of the methanol fuel in each fuel injector 3 can be roughly the same, so that the temperature of the methanol fuel delivered to the corresponding cylinder is roughly the same, to ensure that each cylinder can have methanol fuel with roughly the same evaporation and atomization effects, to ensure that the thermal efficiency of each cylinder is roughly the same, thereby improving the thermal efficiency of the direct-injection methanol engine 100 as a whole.

[0038] In some embodiments of the present invention, the sub-heating element 41 includes: an electric heating wire, which surrounds the corresponding fuel injector 3 .

[0039] Among them, the electric heating wire of the sub-heating element 41 can be arranged around the corresponding fuel injector 3, and the electric heating wire can be wound around the outer wall of the fuel injector 3, so that the heat of the electric heating wire can be transferred to the fuel injector 3 more directly, so as to improve the efficiency of heating the methanol fuel in the fuel injector 3, and can improve the heat transfer efficiency of the heating component, thereby improving the reliability of the direct injection methanol engine 100.

[0040] In some embodiments of the present invention, Figure 2 As shown, the sub-heating element 41 further includes: a mounting shell 411 , which is sleeved on the corresponding fuel injector 3 and defines an accommodating cavity 412 , and the electric heating wire is arranged in the accommodating cavity 412 and around the inner wall of the accommodating cavity 412 .

[0041] Among them, the mounting shell 411 of the sub-heating element 41 can be sleeved on the corresponding fuel injector 3, the mounting shell 411 can define a receiving cavity 412, the electric heating wire can be arranged in the receiving cavity 412, and the electric heating wire can be arranged around the inner wall of the receiving cavity 412, so that the heat of the electric heating wire can be transferred to the fuel injector 3 more directly, so as to improve the efficiency of heating the methanol fuel in the fuel injector 3. In addition, the outer wall of the mounting shell 411 can have a certain heat insulation effect to reduce heat dissipation, so that the heat of the electric heating wire can be more effectively transferred to the fuel injector 3, so as to further improve the working efficiency of the heating component and enhance the reliability of the direct injection methanol engine 100.

[0042] Moreover, the mounting shell 411 can protect the electric heating wire within the accommodating cavity 412 defined by it, so as to reduce the risk of contact between the electric heating wire and other components, thereby improving the safety of use of the in-cylinder direct injection methanol engine 100.

[0043] In some embodiments of the present invention, Figure 2 As shown, the in-cylinder direct injection methanol engine 100 further includes: a power supply component 42, and the power supply component 42 is connected to the electric heating wire.

[0044] Among them, the power supply 42 of the in-cylinder direct injection methanol engine 100 can be connected to the electric heating wire, and the power supply 42 can be used to provide electrical energy to the electric heating wire. The power supply 42 can reliably supply power to the electric heating wire, so that the electric heating wire can generate heat and quickly heat the methanol fuel, so that the temperature of the methanol fuel delivered to the cylinder can quickly approach the preset temperature, thereby solving the problem of cold start of the in-cylinder direct injection methanol engine 100.

[0045] In some embodiments of the present invention, the power supply 42 includes: a motor and / or an energy storage battery.

[0046] Among them, the power supply component 42 may include a motor, which can provide electric energy to the electric heating wire so that the electric heating wire can heat the methanol fuel in the fuel injector 3, or the power supply component 42 may include an energy storage battery, which stores electric energy, and the energy storage battery can provide electric energy to the electric heating wire so that the electric heating wire can heat the methanol fuel in the fuel injector 3, or the power supply component 42 may include a motor and an energy storage battery, when the electric energy that the motor can provide is sufficient, the energy storage battery does not work, and when the electric energy that the motor can provide is insufficient, the energy storage battery starts to work, and the motor and the energy storage battery can jointly provide electric energy to the electric heating wire so that the electric heating wire can heat the methanol fuel in the fuel injector 3, so as to ensure the efficiency of heating the methanol fuel in the fuel injector 3, so that the temperature of the methanol fuel delivered to the cylinder can be closer to the preset temperature, thereby solving the problem of cold start of the direct injection methanol engine 100 and improving the reliability of the direct injection methanol engine 100.

[0047] In some embodiments of the present invention, the heating assembly further includes: a PTC heating plate, the sub-heating element 41 includes: a mounting shell 411, the mounting shell 411 is sleeved on the corresponding fuel injector 3 and defines a accommodating cavity 412, and the PTC heating plate and the accommodating cavity 412 form a medium circulation loop.

[0048] Among them, the mounting shell 411 of the sub-heating element 41 can be sleeved on the corresponding fuel injector 3, the mounting shell 411 can define a accommodating cavity 412, the PTC heating plate of the heating component can form a medium circulation loop with the accommodating cavity 412, the medium circulation loop has a medium, the medium can be but not limited to liquid medium, gas medium, phase change medium, etc., the PTC heating plate can heat the medium in the medium circulation loop, the medium can transfer the heat of the PTC heating plate to the fuel in the fuel injector 3, and then the temperature of the methanol fuel delivered to the cylinder can be closer to the preset temperature, thereby solving the problem of cold start of the direct injection methanol engine 100 in the cylinder.

[0049] In some embodiments of the present invention, Figure 1 As shown, the methanol direct injection engine 100 further includes a fuel rail 6 , a plurality of fuel injectors 3 are disposed on the fuel rail 6 , and a fuel pump 2 is connected between the fuel tank 1 and the fuel rail 6 to transport the methanol fuel in the fuel tank 1 to the fuel rail 6 .

[0050] Among them, multiple fuel injectors 3 are each provided with a mounting plate 32, and the mounting plate 32 can be connected to the fuel rail 6 of the in-cylinder direct injection methanol engine 100. Multiple fuel injectors 3 can be fixedly connected to the fuel rail 6 through their respective mounting plates 32. The fuel pump 2 can be connected between the fuel tank 1 and the fuel rail 6. The fuel pump 2 can be used to transport the methanol fuel in the fuel tank 1 to the fuel rail 6. The fuel rail 6 can evenly distribute the methanol fuel to each fuel injector 3. The fuel rail 6 can balance the pressure of each fuel injector 3 so that the pressure of the methanol fuel delivered to each corresponding cylinder is roughly the same, so that the combustion performance of the in-cylinder direct injection methanol engine 100 is stable and reliable.

[0051] In some embodiments of the present invention, the in-cylinder direct injection methanol engine 100 also includes a pressure sensor, which is arranged on the fuel rail 6 and is used to detect the pressure of the methanol fuel in the fuel rail 6. The controller 7 is connected to the pressure sensor and the fuel pump 2 and is configured to control the power of the fuel pump 2 according to the pressure information of the methanol fuel.

[0052] Among them, the pressure sensor of the direct injection methanol engine 100 can be arranged on the fuel rail 6. The pressure sensor can be used to detect the pressure of the methanol fuel in the fuel rail 6. The pressure sensor can transmit the pressure information of the methanol fuel in the fuel rail 6 to the controller 7. The controller 7 is connected to the pressure sensor and the fuel pump 2. The controller 7 is used to control the power of the fuel pump 2 according to the pressure information of the methanol fuel to control the pressure applied to the methanol fuel by the fuel pump 2 so that the methanol fuel reaches a preset pressure value, which is conducive to the evaporation and atomization of the methanol fuel, thereby reducing the amount of wall collision and improving the thermal efficiency of the methanol fuel.

[0053] As some embodiments of the present application, the fuel pump 2 may further include a solenoid valve, which is connected between the fuel rail 6 and the fuel tank 1. The solenoid valve may be connected to a controller 7, which may be used to control whether the solenoid valve is energized to control whether the pipeline between the fuel tank 1 and the fuel rail 6 is conductive.

[0054] The vehicle according to the embodiment of the present invention includes the above-mentioned in-cylinder direct injection methanol engine 100. By providing a heating component, a temperature sensor 5 and a controller 7, the methanol fuel injected by the fuel injector 3 can be heated and the temperature of the injected methanol fuel can be detected in real time and accurately. The controller 7 can control the power of the heating component to control the ability of the heating component to heat the methanol fuel so that the temperature of the methanol fuel delivered to the cylinder can be closer to the preset temperature, thereby solving the problem of cold start of the in-cylinder direct injection methanol engine 100 and improving the reliability and application prospects of the in-cylinder direct injection methanol engine 100.

[0055] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0056] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0057] In the description of the present invention, "plurality" means two or more.

[0058] In the description of the present invention, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0059] In the description of the present invention, “on”, “over” and “above” a first feature from a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0060] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative 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.

[0061] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A methanol direct injection engine (100), characterized in that: include: an engine body defining a plurality of cylinders; A fuel tank (1), wherein methanol fuel is stored in the fuel tank (1); A fuel pump (2) and a plurality of fuel injectors (3), wherein the fuel pump (2) is connected between the fuel tank (1) and the fuel injectors (3) to deliver the methanol fuel in the fuel tank (1) toward the fuel injectors (3), the plurality of fuel injectors (3) correspond one to one with the plurality of cylinders, and the plurality of fuel injectors (3) are used to deliver the methanol fuel to the corresponding cylinders; a heating component, the heating component being arranged on the plurality of the fuel injectors (3) and being used for heating the methanol fuel delivered by the fuel injectors (3) to the corresponding cylinders; A controller (7) and a plurality of temperature sensors (5), wherein the plurality of temperature sensors (5) are arranged on the plurality of fuel injectors (3) and are used to detect the temperature of the methanol fuel delivered by the corresponding fuel injectors (3); the controller (7) is connected to the plurality of temperature sensors (5) and the heating component and is configured to control the power of the heating component according to the temperature information of the methanol fuel.

2. The direct-injection methanol engine (100) according to claim 1, characterized in that: The heating assembly comprises: a plurality of sub-heating elements (41), and the plurality of sub-heating elements (41) correspond one-to-one to the plurality of fuel injectors (3).

3. The direct-injection methanol engine (100) according to claim 2, characterized in that: The sub-heating element (41) comprises an electric heating wire, wherein the electric heating wire surrounds the corresponding fuel injector (3).

4. The direct-injection methanol engine (100) according to claim 3, characterized in that: The sub-heating element (41) further comprises: a mounting shell (411), wherein the mounting shell (411) is sleeved on the corresponding fuel injector (3) and defines a receiving cavity (412), and the electric heating wire is arranged in the receiving cavity (412) and around the inner wall of the receiving cavity (412).

5. The direct-injection methanol engine (100) according to claim 3, characterized in that: Also includes: A power supply component (42), wherein the power supply component (42) is connected to the electric heating wire.

6. The direct-injection methanol engine (100) according to claim 5, characterized in that: The power supply (42) comprises: a motor and / or an energy storage battery.

7. The direct-injection methanol engine (100) according to claim 2, characterized in that: The heating assembly further comprises: a PTC heating plate; the sub-heating element (41) comprises: a mounting shell (411); the mounting shell (411) is sleeved on the corresponding fuel injector (3) and defines a receiving cavity (412); the PTC heating plate and the receiving cavity (412) form a medium circulation loop.

8. The in-cylinder direct injection methanol engine (100) according to any one of claims 1 to 7, characterized in that: Also includes: A fuel rail (6), a plurality of the fuel injectors (3) are arranged on the fuel rail (6), and the fuel pump (2) is connected between the fuel tank (1) and the fuel rail (6) to transport the methanol fuel in the fuel tank (1) to the fuel rail (6).

9. The direct-injection methanol engine (100) according to claim 8, characterized in that: The invention also includes a pressure sensor, which is arranged on the fuel rail (6) and is used to detect the pressure of the methanol fuel in the fuel rail (6); the controller (7) is connected to the pressure sensor and the fuel pump (2) and is configured to control the power of the fuel pump (2) according to the pressure information of the methanol fuel.

10. A vehicle, characterized in that: It comprises an in-cylinder direct injection methanol engine (100) according to any one of claims 1 to 9.

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