Fuel supply system and vehicle

Abstract

The present invention belongs to the technical field of automobiles, and discloses a fuel supply system and a vehicle. The fuel supply system includes a main fuel supply mechanism, a secondary fuel supply mechanism, a diesel filter, and a degassing switching mechanism. The main fuel supply mechanism includes a main fuel tank, the main fuel tank is connected to the engine through a return oil pipeline, a fuel filter and a heater are arranged in the main fuel tank, the fuel filter is used for purifying the fuel in the main fuel tank, and the heater is used for heating the fuel in the main fuel tank; the secondary fuel supply mechanism includes a secondary fuel tank; the inlet of the diesel filter is connected to the outlet of the fuel filter, and the outlet of the diesel filter is connected to the engine through a fuel supply pipeline; the main fuel tank, the secondary fuel tank, and the diesel filter are respectively connected to the degassing switching mechanism, and the degassing switching mechanism has at least three states: in the first state, the diesel filter is connected to the main fuel tank; in the second state, the secondary fuel tank is connected to the diesel filter; in the third state, the secondary fuel tank is connected to the main fuel tank, and the diesel filter is connected to the degassing switching mechanism. The fuel supply control mode of the fuel supply system is simplified and convenient to operate.

Description

Technical Field

[0001] The present invention relates to the technical field of automobiles, and particularly to a fuel supply system and a vehicle. Background Art

[0002] Diesel commercial vehicles have characteristics such as long vehicle operating mileage and high timeliness, and are generally equipped with a relatively large fuel tank volume. Due to the influence of the overall vehicle layout, the fuel tank volume cannot be increased infinitely.

[0003] To solve the above problems, the prior art discloses a dual fuel tank oil supply device. The dual fuel tank oil supply device includes a main fuel tank, a secondary fuel tank, and a diesel filter. The main fuel tank is connected to the engine through an oil return passage and an oil supply passage. The outlet pipe of the secondary fuel tank is connected to the oil return passage, and can supply oil to the main fuel tank, and an electromagnetic valve is used to control the on-off of the outlet pipe. The dual fuel tank oil supply device also includes an electric pump, which is connected to the diesel filter and the oil return passage, extracts the gas in the diesel filter, and pumps the gas back to the main fuel tank.

[0004] The gas return function and refueling function of the main fuel tank of the above dual fuel tank oil supply device need to be realized by using an electromagnetic valve and an electric pump respectively, and the operation is cumbersome.

[0005] Therefore, there is an urgent need for a fuel supply system and a vehicle to solve the above problems. Summary of the Invention

[0006] According to one aspect of the present invention, an object is to provide a fuel supply system, in which the oil supply control method of the fuel supply system is simplified and the operation is convenient.

[0007] To achieve this purpose, the present invention adopts the following technical solutions:

[0008] A fuel supply system, comprising:

[0009] A main oil supply mechanism, the main oil supply mechanism includes a main fuel tank, the main fuel tank is connected to the engine through an oil return pipeline, a fuel filter and a heater are arranged in the main fuel tank, the fuel filter is used for purifying the fuel in the main fuel tank, and the heater is used for heating the fuel in the main fuel tank;

[0010] A secondary oil supply mechanism, the secondary oil supply mechanism includes a secondary fuel tank;

[0011] A diesel filter, the inlet of the diesel filter is connected to the outlet of the fuel filter, and the outlet of the diesel filter is connected to the engine through an oil supply pipeline;

[0012] An air removal switching mechanism, the main fuel tank, the secondary fuel tank and the diesel filter are respectively connected to the air removal switching mechanism, and the air removal switching mechanism includes at least three states:

[0013] In the first state, the diesel filter is connected to the main fuel tank;

[0014] In the second state, the auxiliary fuel tank is communicated with the diesel filter.

[0015] In the third state, the auxiliary fuel tank is communicated with the main fuel tank, and the diesel filter is communicated with the degassing switching mechanism.

[0016] As a preferred solution of the fuel supply system provided by the present invention, the degassing switching mechanism includes a valve body, a valve core and a degassing pump. The degassing pump is integrated in the valve body and is used to remove the gas inside the valve body. The valve core is rotatably arranged coaxially in the valve body, and the valve core can rotate around its own axis so that the degassing switching mechanism can be switched between three states.

[0017] As a preferred solution of the fuel supply system provided by the present invention, the valve body includes an inner cylinder and an outer cylinder sleeved coaxially. A valve cavity is formed in the inner cylinder, and the degassing pump can remove the gas in the valve cavity. The valve core is rotatably inserted between the inner cylinder and the outer cylinder. The valve body is provided with a first through hole and a second through hole penetrating through its circumferential side part. The first through hole is communicated with the main fuel tank, and the second through hole is communicated with the auxiliary fuel tank.

[0018] In the first state, among the first through hole and the second through hole, only the first through hole is communicated with the valve cavity.

[0019] In the second state, among the first through hole and the second through hole, only the second through hole is communicated with the valve cavity.

[0020] In the third state, the valve cavity is communicated with both the first through hole and the second through hole.

[0021] As a preferred solution of the fuel supply system provided by the present invention, a third through hole is also penetrated through the circumferential side wall of the valve body. A flow collecting part is arranged on the outer wall of the outer cylinder. The flow collecting part is provided with a flow collecting through hole communicated with the auxiliary fuel tank. Both the second through hole and the third through hole are located in the inner cavity of the flow collecting part. A third middle hole capable of being communicated with the third through hole is also opened on the circumferential side wall of the valve core. The first through hole includes a first main through hole and a second main through hole distributed at intervals along the circumferential direction of the valve body. A first middle hole capable of being communicated with the first through hole and a second middle hole capable of being communicated with the second through hole are opened on the side wall of the valve core. Among them,

[0022] In the first state, the first middle hole is communicated with the first main through hole.

[0023] In the second state, the second middle hole is communicated with the second through hole.

[0024] In the third state, the first middle hole is communicated with the second main through hole, and the third middle hole is communicated with the third through hole.

[0025] As a preferred embodiment of the fuel supply system provided by the present invention, a bottom through-hole is formed at the bottom of the inner cylinder, the bottom through-hole communicates with the valve cavity, a filter hole is formed at the bottom of the valve core, and the filter hole communicates with the bottom through-hole; the filter hole includes first, second, and third filter holes that are spaced apart. When the valve core rotates, the bottom through-hole can selectively communicate with the first filter hole, the second filter hole, or the third filter hole;

[0026] In the first state, the first filter hole communicates with the bottom through-hole;

[0027] In the second state, the second filter hole communicates with the bottom through-hole;

[0028] In the third state, the third filter hole communicates with the bottom through-hole.

[0029] As a preferred embodiment of the fuel supply system provided by the present invention, the fuel filter integrates a water heating pipeline, and both ends of the water heating pipeline communicate with the inlet and outlet of the engine cooling water tank respectively.

[0030] As a preferred embodiment of the fuel supply system provided by the present invention, the fuel filter includes a housing, a filter element, and an electric heating component. A middle hole is formed in the housing, the filter element is arranged in the middle hole, a part of the electric heating component is arranged in the filter element, and another part of the electric heating component is arranged on the inner wall of the housing.

[0031] As a preferred embodiment of the fuel supply system provided by the present invention, the main fuel supply mechanism further includes a first liquid level sensor, which is integrated in the main fuel tank and used to measure the liquid level in the main fuel tank.

[0032] As a preferred embodiment of the fuel supply system provided by the present invention, the auxiliary fuel supply mechanism further includes a second liquid level sensor, which is integrated in the auxiliary fuel tank and used to measure the liquid level in the auxiliary fuel tank.

[0033] According to another aspect of the present invention, an object is to provide a vehicle, which includes the fuel supply system according to any one of the above solutions.

[0034] Advantages of the present invention:

[0035] The fuel supply system provided by the present invention includes a main fuel supply mechanism, a secondary fuel supply mechanism, a diesel filter, and a degassing and switching mechanism. The main fuel supply mechanism includes a main fuel tank, which is connected to the engine through a return oil pipeline. A fuel filter and a heater are provided in the main fuel tank. That is to say, the fuel filter is used to preliminarily purify the fuel in the main fuel tank, and the heater is used to heat the fuel in the main fuel tank. The inlet of the diesel filter is connected to the outlet of the fuel filter, and the outlet of the diesel filter is connected to the engine through a fuel supply pipeline. Through the diesel filter, the fuel supplied to the engine can be further purified and degassed. The secondary fuel supply mechanism includes a secondary fuel tank. The main fuel tank, the secondary fuel tank, and the diesel filter are respectively connected to the degassing and switching mechanism, and the degassing and switching mechanism has at least three states. That is to say, only through the degassing and switching mechanism, the switching of the states of exhausting air from the diesel filter to the main fuel tank, opening the passage between the main fuel tank and the secondary fuel tank, and supplying fuel from the secondary fuel tank to the main fuel tank can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the content of the embodiments of the present invention and these drawings.

[0037] Figure 1 is a schematic diagram of the fuel supply system provided by the embodiment of the present invention;

[0038] Figure 2 is a schematic structural diagram of the degassing and switching mechanism provided by the embodiment of the present invention;

[0039] Figure 3 is the structural decomposition of the degassing and switching mechanism provided by the embodiment of the present invention Figure 1 ;

[0040] Figure 4 is the structural decomposition of the degassing and switching mechanism provided by the embodiment of the present invention Figure 2 ;

[0041] Figure 5 is a half-sectional view of the degassing and switching mechanism provided by the embodiment of the present invention in the first state;

[0042] Figure 6 is a half-sectional view of the degassing and switching mechanism provided by the embodiment of the present invention in the second state;

[0043] Figure 7 is a half-sectional view of the degassing and switching mechanism provided by the embodiment of the present invention in the third state.

[0044] In the figure:

[0045] 100. Engine

[0046] 1. Main fuel tank; 11. Fuel filter; 12. Heater

[0047] 2. Return oil pipeline

[0048] 3. Auxiliary fuel tank; 31. Fuel delivery pipe

[0049] 4. Diesel filter; 41. Degassing pipe

[0050] 5. Fuel supply pipeline

[0051] 6. Degassing switching mechanism; 61. Valve body; 611. Inner cylinder; 6111. Bottom through hole; 612. Outer cylinder; 613. First through hole; 6131. First main through hole; 6132. Second main through hole; 614. Second through hole; 615. Third through hole; 616. Flow collecting part; 6161. Flow collecting through hole; 62. Spool; 621. First middle hole; 622. Second middle hole; 623. Third middle hole; 624. Filtering air hole; 6241. First filtering air hole; 6242. Second filtering air hole; 6243. Third filtering air hole; 63. Degassing pump

[0052] 7. First liquid level sensor

[0053] 8. Second liquid level sensor Detailed implementation manners

[0054] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all the structures.

[0055] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0056] In the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0057] In the description of this embodiment, the orientation or positional relationships such as "up", "down", "right", "left", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0058] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0059] Referring to Figure 1 , this embodiment provides a fuel supply system. The fuel supply system includes a main fuel supply mechanism, a secondary fuel supply mechanism, a diesel filter 4 and a deaeration switching mechanism 6.

[0060] Specifically, the main fuel supply mechanism includes a main fuel tank 1. The main fuel tank 1 is connected to the engine 100 through a return oil pipeline 2. A fuel filter 11 and a heater 12 are provided in the main fuel tank 1. The fuel filter 11 is used to preliminarily purify the fuel in the main fuel tank 1, and the heater 12 is used to heat the fuel in the main fuel tank 1 and melt it.

[0061] More specifically, the fuel filter 11 is integrally provided with the main fuel tank 1, without occupying space outside the main fuel tank 1, having a compact structure and reasonable utilization of the installation space. After the electrically heated fuel is completely melted, impurities and gases are filtered under the action of the filter, and clean fuel is supplied for the engine 100 to operate. During the preheating stage of the engine 100, the melted fuel circulates in the cavity of the integrated fuel filter 11 to ensure sufficient fuel supply during the preheating stage. After the engine 100 completes preheating, the heater 12 stops electric heating.

[0062] More specifically, the auxiliary fuel supply mechanism includes an auxiliary fuel tank 3, and an oil delivery pipe 31 communicating with its inner cavity is provided on the auxiliary fuel tank 3. The inlet of the diesel filter 4 communicates with the outlet of the fuel filter 11, and the outlet of the diesel filter 4 communicates with the engine 100 through a fuel supply pipeline 5. That is to say, through the diesel filter 4, further purification of the fuel can be achieved. The main fuel tank 1, the auxiliary fuel tank 3, and the diesel filter 4 are respectively connected to the degassing switching mechanism 6.

[0063] More specifically, the fuel filter 11 integrates a water heating pipeline, and both ends of the water heating pipeline communicate with the inlet and outlet of the engine cooling water tank respectively. The fuel filter 11 can be heated by the engine circulating cooling water.

[0064] Preferably, the fuel filter 11 includes a housing, a filter element, and an electric heating component. A middle hole is formed in the housing, the filter element is arranged in the middle hole, a part of the electric heating component is arranged in the filter element, and the other part of the electric heating component is arranged on the inner wall of the housing.

[0065] The degassing switching mechanism 6 provided in this embodiment includes at least three states:

[0066] In the first state, the diesel filter 4 is communicated with the main fuel tank 1;

[0067] In the second state, the auxiliary fuel tank 3 is communicated with the diesel filter 4;

[0068] In the third state, the auxiliary fuel tank 3 is communicated with the main fuel tank 1, and the diesel filter 4 is communicated with the degassing switching mechanism 6.

[0069] Refer to Figures 2 - 7 , specifically, the degassing switching mechanism 6 includes a valve body 61, a valve core 62, and a degassing pump 63. The degassing pump 63 is integrated in the valve body 61 and is used to remove the gas inside the valve body 61. The valve core 62 is rotatably arranged coaxially in the valve body 61, and the valve core 62 can rotate around its own axis to realize the switching of three states.

[0070] Specifically, the valve body 61 includes an inner cylinder 611 and an outer cylinder 612 which are coaxially sleeved. A valve cavity is formed in the inner cylinder 611, and the degassing pump 63 can remove the gas in the valve cavity. The valve body 61 is provided with a first through hole 613 and a second through hole 614 penetrating through its circumferential part. The first through hole 613 communicates with the main fuel tank 1, and the second through hole 614 communicates with the auxiliary fuel tank 3. A first middle hole 621 capable of communicating with the first through hole 613 and a second middle hole 622 capable of communicating with the second through hole 614 are formed on the side wall of the valve core 62.

[0071] Specifically, a third through hole 615 is also formed through the side wall of the valve body 61 in a penetrating manner, and a flow collecting portion 616 is arranged on the outer wall of the outer cylinder 612. A flow collecting through hole 6161 communicating with the auxiliary fuel tank 3 is formed in the flow collecting portion 616. Both the second through hole 614 and the third through hole 615 are located in the inner cavity of the flow collecting portion 616. A third middle hole 623 capable of communicating with the third through hole 615 is further formed in the side wall of the valve core 62. Among them, in the second state, the second middle hole 622 is communicated with the second through hole 614; in the third state, the third middle hole 623 is communicated with the third through hole 615.

[0072] Referring to Figure 6 , in the second state, the second middle hole 622 is only communicated with the second through hole 614. At this time, the fuel in the fuel filter 4 flows into the inner cavity of the flow collecting portion 616 through the valve cavity, the second middle hole 622 and the second through hole 614, and flows to the fuel pipeline 31 through the flow collecting through hole 6161 on the flow collecting portion 616. Referring to Figure 7 , in the third state, the third middle hole 623 is communicated with the third through hole 615. At this time, the fuel in the auxiliary fuel tank 3 flows into the inner cavity of the flow collecting portion 616 through the flow collecting through hole 6161, then flows into the valve cavity through the third through hole 615 and the third middle hole 623, and then flows into the main fuel tank 1 through the first middle hole 621 and the first through hole 613. Through the arrangement of the flow collecting portion 616, the second through hole 614 and the third through hole 615, the main fuel tank 1 can supply fuel to the fuel pipeline 31 and the auxiliary fuel tank 3 can supply fuel to the main fuel tank 1 respectively using the second through hole 614 and the third through hole 615, preventing blockage when only using one second through hole 614 to communicate the valve cavity and the auxiliary fuel tank 3, and improving the reliability of the degassing switching mechanism 6.

[0073] More specifically, the first through hole 613 includes a first main through hole 6131 and a second main through hole 6132 which are distributed at intervals along the circumferential direction of the valve body 61. Among them, in the first state, among the first middle hole 621 and the second middle hole 622, only the first middle hole 621 is communicated with the first main through hole 6131; in the second state, among the first middle hole 621 and the second middle hole 622, only the second middle hole 622 is communicated with the second through hole 614; in the third state, the first middle hole 621 is communicated with the second main through hole 6132, and the third middle hole 623 is communicated with the third through hole 615. By arranging the first middle hole 621, the second middle hole 622 and the third middle hole 623 on the valve core 62, and arranging the first main through hole 6131, the second main through hole 6132, the second through hole 614 and the third through hole 615 on the valve body 61, only by reasonably setting the positions and relative positions of each hole can the switching of the three states of the degassing switching mechanism 6 be realized in sequence when the valve core 62 rotates. The structure is simple, the processing difficulty and processing cost are reduced, and at the same time, the fuel supply control method is simplified.

[0074] Continuing to refer toFigures 2 - 7 , a bottom through-hole 6111 is formed at the bottom of the inner cylinder 611. The bottom through-hole 6111 communicates with the valve cavity. A filter hole 624 is formed at the bottom of the valve core 62, and the filter hole 624 communicates with the bottom through-hole 6111.

[0075] Specifically, the filter hole 624 includes a first filter hole 6241, a second filter hole 6242, and a third filter hole 6243 that are circumferentially spaced apart. When the valve core 62 rotates, the bottom through-hole 6111 can selectively communicate with the first filter hole 6241, the second filter hole 6242, or the third filter hole 6243. In the first state, the first filter hole 6241 communicates with the bottom through-hole 6111; in the second state, the second filter hole 6242 communicates with the bottom through-hole 6111; in the third state, the third filter hole 6243 communicates with the bottom through-hole 6111. When the first filter hole 6241, the second filter hole 6242, and the third filter hole 6243 rotate with the valve core 62, they can sequentially communicate with the bottom through-hole 6111, thereby communicating with the valve cavity, so that the fuel in the fuel filter 4 and the gas in the fuel enter the valve cavity and are degassed by the degassing pump 63. The first filter hole 6241 and the second filter hole 6242 are respectively connected to the fuel filter 4 by different connecting pipes, and the third filter hole 6243 is connected to the fuel filter 4 through the degassing pipe 41.

[0076] Preferably, the aperture of the third filter hole 6243 is smaller than the aperture of the bottom through-hole 6111. The third filter hole 6243 is a small hole relative to the first filter hole 6241 and the second filter hole 6242. In the third state, that is, when the third filter hole 6243 communicates with the valve cavity, it is difficult for the fuel in the main fuel tank 1 to enter the valve cavity through the smaller-diameter third hole 2043 after passing through the fuel filter 4. Only the gas in the fuel can enter the valve cavity through the degassing pipe 41 and the third filter hole 6243 and be degassed by the degassing pump 63. At this time, the degassing pump 63 also degasses the fuel flowing from the auxiliary fuel tank 3 to the main fuel tank 1.

[0077] Preferably, the main fuel supply mechanism further includes a first liquid level sensor 7, which is integrated in the main fuel tank 1 and is used to sense the liquid level signal in the main fuel tank 1. Similarly, the auxiliary fuel supply mechanism further includes a second liquid level sensor 8, which is integrated in the auxiliary fuel tank 3 and is used to sense the liquid level signal in the auxiliary fuel tank 3.

[0078] This embodiment also provides a vehicle, which includes the fuel supply system provided in this embodiment. The fuel supply control method of the fuel supply system is simplified, making the engine fuel supply control of the vehicle more convenient.

[0079] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A fuel supply system, characterized in that, Comprising: The main fuel supply mechanism, the main fuel supply mechanism includes a main fuel tank (1), the main fuel tank (1) is connected to the engine (100) through a return oil pipeline (2), a fuel filter (11) and a heater (12) are arranged in the main fuel tank (1), the fuel filter (11) is used to purify the fuel in the main fuel tank (1), and the heater (12) is used to heat the fuel in the main fuel tank (1); The auxiliary fuel supply mechanism, the auxiliary fuel supply mechanism includes an auxiliary fuel tank (3); The diesel filter (4), the inlet of the diesel filter (4) is connected to the outlet of the fuel filter (11), and the outlet of the diesel filter (4) is connected to the engine (100) through a fuel supply pipeline (5); The degassing switching mechanism (6), the main fuel tank (1), the auxiliary fuel tank (3) and the diesel filter (4) are respectively connected to the degassing switching mechanism (6), and the degassing switching mechanism (6) has at least three states: In the first state, the diesel filter (4) is connected to the main fuel tank (1); In the second state, the auxiliary fuel tank (3) is connected to the diesel filter (4); In the third state, the auxiliary fuel tank (3) is connected to the main fuel tank (1), and the diesel filter (4) is connected to the degassing switching mechanism (6); The degassing switching mechanism (6) includes a valve body (61), a valve core (62) and a degassing pump (63), the degassing pump (63) is integrated in the valve body (61) and is used to remove the gas inside the valve body (61); the valve core (62) is rotatably arranged coaxially in the valve body (61), and the valve core (62) can rotate around its own axis to enable the degassing switching mechanism (6) to switch between three states; The valve body (61) includes an inner cylinder (611) and an outer cylinder (612) sleeved coaxially, a valve cavity is formed in the inner cylinder (611), and the degassing pump (63) can remove the gas in the valve cavity; the valve core (62) is rotatably inserted between the inner cylinder (611) and the outer cylinder (612); the valve body (61) is provided with a first through hole (613) and a second through hole (614) penetrating through its circumferential side part, the first through hole (613) is connected to the main fuel tank (1), and the second through hole (614) is connected to the auxiliary fuel tank (3); In the first state, among the first through hole (613) and the second through hole (614), only the first through hole (613) is connected to the valve cavity; In the second state, among the first through hole (613) and the second through hole (614), only the second through hole (614) is connected to the valve cavity; In the third state, the valve cavity is connected to both the first through hole (613) and the second through hole (614).

2. The fuel supply system according to claim 1, characterized in that, A third through hole (615) is also formed through the circumferential side wall of the valve body (61). A flow collecting portion (616) is provided on the outer wall of the outer cylinder (612). A flow collecting through hole (6161) communicating with the auxiliary fuel tank (3) is formed in the flow collecting portion (616). Both the second through hole (614) and the third through hole (615) are located in the inner cavity of the flow collecting portion (616). A third middle hole (623) capable of communicating with the third through hole (615) is further formed in the circumferential side wall of the valve core (62). The first through hole (613) includes a first main through hole (6131) and a second main through hole (6132) that are circumferentially spaced apart along the valve body (61). A first middle hole (621) capable of communicating with the first through hole (613) and a second middle hole (622) capable of communicating with the second through hole (614) are formed in the side wall of the valve core (62). Wherein, In the first state, the first middle hole (621) communicates with the first main through hole (6131); In the second state, the second middle hole (622) communicates with the second through hole (614); In the third state, the first middle hole (621) communicates with the second main through hole (6132), and the third middle hole (623) communicates with the third through hole (615).

3. The fuel supply system according to claim 1, characterized in that, A bottom through hole (6111) is formed at the bottom of the inner cylinder (611). The bottom through hole (6111) communicates with the valve cavity. A filter air hole (624) is formed at the bottom of the valve core (62). The filter air hole (624) communicates with the bottom through hole (6111). The filter air hole (624) includes a first filter air hole (6241), a second filter air hole (6242), and a third filter air hole (6243) that are spaced apart. When the valve core (62) rotates, the bottom through hole (6111) can selectively communicate with the first filter air hole (6241), the second filter air hole (6242), or the third filter air hole (6243); In the first state, the first filter air hole (6241) communicates with the bottom through hole (6111); In the second state, the second filter air hole (6242) communicates with the bottom through hole (6111); In the third state, the third filter air hole (6243) communicates with the bottom through hole (6111).

4. The fuel supply system according to claim 1, characterized in that, The fuel filter (11) integrates a water heating pipeline, and both ends of the water heating pipeline communicate with the inlet and outlet of the engine cooling water tank respectively.

5. The fuel supply system according to claim 1, characterized in that, The fuel filter (11) includes a housing, a filter element, and an electric heating component. A middle hole is formed in the housing. The filter element is arranged in the middle hole. A part of the electric heating component is arranged in the filter element, and another part of the electric heating component is arranged on the inner wall of the housing.

6. The fuel supply system according to claim 1, characterized in that The main fuel supply mechanism further includes a first liquid level sensor (7). The first liquid level sensor (7) is integrated in the main fuel tank (1) and is used to measure the liquid level in the main fuel tank (1).

7. The fuel supply system according to claim 1, wherein, The auxiliary fuel supply mechanism further includes a second liquid level sensor (8). The second liquid level sensor (8) is integrated in the auxiliary fuel tank (3) and is used to measure the liquid level in the auxiliary fuel tank (3).

8. A vehicle, characterized in that, Comprising the fuel supply system according to any one of claims 1-7.

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