Engine fuel system, control method and drive system

Abstract

The present invention relates to the field of engine fuel systems and provides an engine fuel system, a control method and a drive system. A ventilation valve is installed on a ventilation duct of a ventilation device, and the ventilation device also includes an angle sensor electrically connected to the ventilation valve. When a carrier on which the engine fuel system is installed rolls over, the angle sensor detects that the angle value of the carrier exceeds a preset angle threshold, and then controls the ventilation valve to close, preventing fuel in a fuel tank from overflowing from the ventilation duct, thereby avoiding environmental pollution caused by the fuel and reducing the risk of combustion and explosion that may be caused by fuel leakage.

Description

Technical Field

[0001] The present invention relates to the field of engine fuel systems, and in particular to an engine fuel system, a control method and a drive system. Background Art

[0002] A fuel tank is a container for holding liquid fuel, which is connected to the engine of a vehicle, such as a motor vehicle or an internal combustion locomotive, through a fuel pipeline to provide fuel to the engine.

[0003] For a closed fuel tank, when the fuel tank is filled with fuel in a sealed manner, the pressure inside the fuel tank will increase as the fuel increases. During engine operation, the pressure inside the fuel tank will decrease as the fuel is continuously consumed. In order to prevent the fuel tank from deforming under the action of air pressure, a ventilation device needs to be installed for the fuel tank to ventilate and balance the excessively high or low pressure in the fuel tank.

[0004] In the related art, a naturally open ventilation device is usually provided directly on the fuel tank for ventilation. When the carrier rolls over, the fuel will leak out of the fuel tank through the naturally open ventilation device, which will not only pollute the environment but also create a higher risk of combustion and explosion. Summary of the Invention

[0005] The present invention provides an engine fuel system, a control method and a drive system, which are used to solve the problem in the prior art that when a carrier rolls over, fuel leaks out of the fuel tank through a naturally open ventilation device, which not only pollutes the environment but also creates a high risk of combustion and explosion. The system automatically closes the ventilation valve when the carrier rolls over to avoid leakage of fuel in the fuel tank.

[0006] The present invention provides an engine fuel system, comprising a fuel tank and at least one ventilation device for balancing the internal pressure of the fuel tank; the ventilation device comprises a ventilation line, at least one ventilation valve and an angle sensor for monitoring the tilt angle of a carrier; one end of the ventilation line is connected to the fuel tank, and the other end is connected to the atmosphere; the ventilation valve is installed on the ventilation line, the angle sensor is electrically connected to the ventilation valve, and the opening and closing of the ventilation valve can be controlled by comparing the monitored angle value with a preset angle threshold.

[0007] According to an engine fuel system provided by the present invention, the ventilation pipeline includes two ventilation branches, the ventilation valve is installed on one ventilation branch, and the first stop valve is installed on the other ventilation branch.

[0008] According to an engine fuel system provided by the present invention, a filter device is installed between the ventilation valve and the first shut-off valve and the air inlet of the ventilation line.

[0009] An engine fuel system provided according to the present invention further includes a fuel pipeline connected to the fuel tank, the fuel pipeline includes an oil supply pipeline and an oil return pipeline, a second shut-off valve is installed on the oil supply pipeline, and a third shut-off valve is installed on the oil return pipeline.

[0010] According to an engine fuel system provided by the present invention, a check valve is installed on the oil supply pipeline for preventing the fuel in the engine from flowing back to the fuel tank through the oil supply pipeline.

[0011] According to an engine fuel system provided by the present invention, the height of the ventilation device is greater than the height of the fuel tank.

[0012] According to an engine fuel system provided by the present invention, the ventilation device is installed outside the carrier, at least a portion of the ventilation device is located on a vertical line of the windward side or leeward side of the fuel tank, and the distance between the ventilation device and the fuel tank is less than a preset distance value.

[0013] According to an engine fuel system provided by the present invention, the ventilation device also includes an acceleration sensor, which is electrically connected to the ventilation valve and can control the opening and closing of the ventilation valve by comparing the monitored acceleration value with a preset acceleration threshold.

[0014] The present invention also provides an engine fuel system control method, comprising: an angle sensor monitoring a tilt angle of a carrier; when the tilt angle exceeds a preset threshold, the angle sensor controlling a ventilation valve to close; when the tilt angle does not exceed the preset threshold, the angle sensor controlling the ventilation valve to remain open;

[0015] or,

[0016] The ventilation device also includes an acceleration sensor, which is electrically connected to the ventilation valve and monitors the tilt angle of the carrier; when the acceleration exceeds a preset threshold, the acceleration sensor controls the ventilation valve to close; when the acceleration does not exceed the preset threshold, the acceleration sensor controls the ventilation valve to remain open.

[0017] The present invention also provides a drive system comprising at least one engine and the engine fuel system as described above, wherein the engine fuel system is connected to the engine and provides fuel to the engine.

[0018] The present invention provides an engine fuel system, which installs a ventilation valve on the ventilation duct of a ventilation device. The ventilation device also includes an angle sensor electrically connected to the ventilation valve. When a carrier on which the engine fuel system is installed rolls over, the angle sensor detects that the angle value of the carrier exceeds a preset angle threshold, and then controls the ventilation valve to close, preventing the fuel in the fuel tank from overflowing from the ventilation duct, thereby avoiding fuel pollution to the environment and reducing the risk of combustion and explosion caused by fuel leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is one of the structural diagrams of the engine fuel system provided by the present invention;

[0021] Figure 2 This is the second structural diagram of the engine fuel system provided by the present invention;

[0022] Figure 3 This is the third structural diagram of the engine fuel system provided by the present invention;

[0023] Figure 4 This is one of the flow charts of the engine fuel system control method provided by the present invention;

[0024] Figure 5 This is the second flow chart of the engine fuel system control method provided by the present invention.

[0025] Reference numerals:

[0026] 1: Fuel tank; 2: Ventilation device; 3: Fuel line; 4: Engine; 5: Filter device; 21: Ventilation line; 22: Ventilation valve; 23: Angle sensor; 24: First shut-off valve; 31: Oil supply line; 32: Oil return line; 33: Second shut-off valve; 34: Third shut-off valve; 35: Check valve. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0028] The following combination Figure 1-Figure 3 The engine fuel system of the present invention is described.

[0029] like Figure 1 As shown, the present invention provides an engine fuel system comprising a fuel tank 1 and at least one ventilation device 2 for balancing the internal pressure of the fuel tank 1. The fuel tank 1 is used to store liquid fuels, such as gasoline and diesel. In an optional embodiment of the present invention, the fuel tank 1 is mounted externally to a vehicle (e.g., a motor vehicle, a diesel locomotive, etc.). The ventilation device 2 is used to connect the fuel tank 1 to the outside atmosphere, balancing the pressure within the fuel tank 1 and preventing the pressure within the fuel tank 1 from being excessive or insufficient.

[0030] The ventilation device 2 includes a ventilation line 21, at least one ventilation valve 22 and an angle sensor 23 for monitoring the tilt angle of the carrier. Figure 1 As shown, one end of the ventilation line 21 is connected to the fuel tank 1, for example, to the top of the sidewall or ceiling of the fuel tank 1, while the other end of the ventilation line 21 is connected to the atmosphere. In an alternative embodiment of the present invention, the end of the ventilation line 21 connected to the atmosphere extends outside the vehicle. A ventilation valve 22 is mounted on the ventilation line 21. When the ventilation valve 22 is open, the fuel tank 1 is connected to the atmosphere, balancing the pressure within the fuel tank 1. When the ventilation valve 22 is closed, the fuel tank 1 is isolated from the atmosphere. An angle sensor 23 is electrically connected to the ventilation valve 22 on the ventilation line and controls its opening and closing. When the angle sensor 23 detects that the vehicle's current tilt angle does not exceed a preset angle threshold, the vehicle is in a normal state, and the angle sensor 23 controls the ventilation valve 22 to remain open. When the angle sensor 23 detects that the vehicle's current tilt angle exceeds the preset angle threshold, it indicates that the vehicle has rolled over, and the angle sensor 23 controls the ventilation valve 22 to remain closed to prevent the fuel in the fuel tank 1 from leaking out of the vehicle through the ventilation line 21. It should be understood that the preset angle threshold can be set based on actual conditions. For example, the preset angle threshold can be set to 45 degrees. This angle far exceeds the tilt angle range during normal operation of the carrier, and it is difficult for the carrier to return to the normal position after exceeding this angle. In an optional embodiment of the present invention, multiple ventilation valves 22 can be installed in the ventilation pipeline, and each is electrically connected to the angle sensor 23 and controlled by the angle sensor 23. This ensures that even if a single ventilation valve 22 malfunctions, it will not cause a failure in the seal of the fuel tank 1.

[0031] In an optional embodiment of the present invention, the engine fuel system further includes a fuel line connected to the fuel tank 1 . The fuel tank 1 is connected to at least one engine 4 through a fuel line 3 and provides fuel to the engine 4 .

[0032] like Figure 2As shown, in an optional embodiment of the present invention, when there are multiple engines 4, each engine 4 is equipped with a fuel line 3 connected to the fuel tank 1. In another optional embodiment of the present invention, when the pressure in the fuel tank 1 fluctuates greatly, more than one ventilation device 2 may be provided for ventilating the fuel tank 1.

[0033] In an optional embodiment of the present invention, the ventilation pipeline 21 includes two ventilation branches, the ventilation valve 22 is installed on one ventilation branch, and the first stop valve 24 is installed on the other ventilation branch. Figure 1 As can be seen, once either the ventilation valve 22 or the first shut-off valve 24 is opened, the fuel tank 1 can be connected to the atmosphere through the ventilation line. The first shut-off valve 24 is normally closed. If the ventilation valve 22 fails, the first shut-off valve 24 can be manually opened to ventilate the fuel tank 1.

[0034] In an optional embodiment of the present invention, a filter device 5 is installed between the ventilation valve 22 and the first stop valve 24 and the air inlet of the ventilation line 21. The filter device 5 can filter impurities in the external air during the ventilation process to prevent impurities from entering the fuel tank 1.

[0035] In an optional embodiment of the present invention, the fuel line 3 includes a supply line 31 and a return line 32. The supply line 31 is used to deliver fuel from the fuel tank 1 to the engine 4, while the return line is used to return fuel from the engine 4 back to the fuel tank 1. A second shutoff valve 33 is installed on the supply line 31, and a third shutoff valve 34 is installed on the return line 32. In exceptional circumstances, such as a vehicle accident, the second and third shutoff valves 33 and 34 can be closed to prevent fuel from entering the engine 4 and ensure safety.

[0036] In an optional embodiment of the present invention, a check valve 35 is installed on the fuel supply line 31 to prevent the fuel in the engine 4 from flowing back into the fuel tank 1 through the fuel supply line 31. The check valve 35 only allows the fuel to pass in one direction from the fuel tank 1 to the engine 4, thereby preventing the fuel in the engine 4 from flowing back into the fuel tank 1 through the fuel supply line under special circumstances.

[0037] In an optional embodiment of the present invention, the ventilation device 2 can be installed inside the vehicle, with the height of the ventilation device 2 being greater than that of the fuel tank 1. If the ventilation device 2 is positioned too low, the fuel in the fuel tank 1 will experience violent fluctuations during emergency braking of the vehicle, and the fuel may easily overflow from the ventilation line 21. By raising the position of the ventilation device 2, fuel overflow through the ventilation line 21 during emergency braking is prevented.

[0038] In an optional embodiment of the present invention, as Figure 3As shown, for a vehicle operating at a relatively low speed, even during emergency braking, the fuel level in fuel tank 1 will not fluctuate significantly. In this case, ventilation device 2 can be positioned not at a high position but rather on the exterior of the vehicle, closer to fuel tank 1, to prevent ventilation duct 21 from passing through the vehicle body. The distance between ventilation device 2 and fuel tank 1 should be less than a predetermined distance value, which can be determined based on the actual vehicle conditions. Preferably, at least a portion of ventilation device 2 is positioned perpendicular to the windward or leeward side of fuel tank 1. This reduces the area of ​​the windward surface formed by ventilation device 2 and fuel tank 1, thereby reducing ventilation resistance.

[0039] In an optional embodiment of the present invention, the ventilation device 2 further includes an acceleration sensor, which is electrically connected to the ventilation valve 22 and can control the opening and closing of the ventilation valve 22 by comparing the monitored acceleration value with a preset acceleration threshold, further preventing the fuel level in the fuel tank 1 from violently shaking and overflowing from the ventilation pipe during emergency braking of the vehicle. The preset acceleration threshold can be set according to the actual operating conditions of different vehicles. For example, if the vehicle is a diesel locomotive, the acceleration threshold can be set to -2m / s. 2 When the acceleration of the carrier during emergency braking exceeds -2m / s 2 When (for example, -2.1m / s 2 ), the acceleration sensor controls the ventilation valve 22 to close.

[0040] In summary, the present invention provides an engine fuel system, which installs a ventilation valve on the ventilation pipe 21 of the ventilation device 2. The ventilation device 2 also includes an angle sensor 23 electrically connected to the ventilation valve 22. When the carrier on which the engine fuel system is installed rolls over, the angle sensor 23 detects that the angle value of the carrier exceeds a preset angle threshold, and then controls the ventilation valve 22 to close, preventing the fuel in the fuel tank 1 from overflowing from the ventilation pipe 21, thereby avoiding fuel pollution to the environment and reducing the risk of combustion and explosion caused by fuel leakage.

[0041] Based on the same inventive concept, the present invention also provides an engine fuel system control method. The engine fuel system control method provided by the present invention is described below. The engine fuel system control method described below and the engine fuel system described above can be referenced to each other.

[0042] like Figure 4 As shown, the present invention provides an engine fuel system control method, comprising:

[0043] The angle sensor 23 monitors the tilt angle of the carrier.

[0044] When the tilt angle exceeds a preset threshold, the angle sensor 23 controls the ventilation valve 22 to close, isolating the fuel tank 1 from the atmosphere. It should be understood that the preset angle threshold can be set according to actual conditions. For example, the preset angle threshold can be set to 45 degrees. This angle far exceeds the tilt angle range during normal operation of the carrier, and it is difficult for the carrier to return to the normal position after exceeding this angle.

[0045] When the tilt angle does not exceed a preset threshold, the angle sensor 23 controls the ventilation valve 22 to open, so that the fuel tank 1 is connected to the atmosphere to balance the pressure in the fuel tank 1 .

[0046] When the ventilation device 2 in the engine fuel system described above further includes an acceleration sensor, the present invention also provides another engine fuel system control method, such as Figure 5 Shown, including:

[0047] The acceleration sensor monitors the acceleration of the carrier;

[0048] When the acceleration exceeds a preset threshold (e.g., during emergency braking), the acceleration sensor controls the ventilation valve 22 to close, isolating the fuel tank 1 from the atmosphere;

[0049] When the acceleration does not exceed the preset threshold, the acceleration sensor controls the ventilation valve 22 to open, so that the fuel tank 1 is connected to the atmosphere to balance the pressure in the fuel tank 1 .

[0050] In summary, the present invention provides an engine fuel system control method, which controls the ventilation valve 22 to close after the angle sensor 23 detects that the angle value of the carrier exceeds a preset angle threshold; or controls the ventilation valve 22 to close after the acceleration sensor detects that the acceleration value of the carrier exceeds a preset acceleration threshold, thereby preventing the fuel in the fuel tank 1 from overflowing from the ventilation line 21, avoiding fuel pollution to the environment, and reducing the risk of combustion and explosion that may be caused by fuel leakage.

[0051] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0052] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An engine fuel system, characterized in that: and a control panel comprising: a first control panel, wherein the control panel comprises a first control panel, and a second control panel is connected to the control panel to control the rotation of the control panel. The control panel comprises a first control panel, wherein the control panel has a first control panel and a second control panel. The first control panel comprises a second control panel, wherein the control panel has a first control panel and a second control panel. The control panel comprises a first control panel, wherein the control panel has a first control panel and a second control panel. When the angle sensor detects that the current tilt angle of the carrier exceeds the preset angle threshold, it indicates that the carrier has overturned. At this time, the angle sensor controls the ventilation valve to remain closed to prevent the fuel in the fuel tank from overflowing along the ventilation pipe to the outside of the carrier and leaking; the ventilation device is installed on the outside of the carrier, and at least a part of the ventilation device is located on the vertical line of the windward side or leeward side of the fuel tank, and the distance between the ventilation device and the fuel tank is less than the preset distance value; the ventilation device also includes an acceleration sensor, which is electrically connected to the ventilation valve and can control the opening and closing of the ventilation valve by comparing the monitored acceleration value with the preset acceleration threshold.

2. The engine fuel system according to claim 1, characterized in that The ventilation pipeline includes two ventilation branches, the ventilation valve is installed on one ventilation branch, and the first stop valve is installed on the other ventilation branch.

3. The engine fuel system according to claim 2, characterized in that: A filter device is installed between the ventilation valve, the first stop valve and the air inlet of the ventilation pipeline.

4. The engine fuel system according to claim 1, characterized in that The fuel pipeline is further comprised of a fuel line connected to the fuel tank. The fuel line comprises an oil supply line and an oil return line. A second shutoff valve is installed on the oil supply line, and a third shutoff valve is installed on the oil return line.

5. The engine fuel system according to claim 4, characterized in that A check valve is installed on the oil supply pipeline to prevent the fuel in the engine from flowing back to the fuel tank through the oil supply pipeline.

6. The engine fuel system according to claim 1, characterized in that The height of the ventilation device is greater than the height of the fuel tank.

7. An engine fuel system control method, applied to the engine fuel system according to any one of claims 1 to 6, characterized in that: include: An angle sensor monitors the tilt angle of the carrier; When the tilt angle exceeds a preset threshold, the angle sensor controls the ventilation valve to close; when the tilt angle does not exceed the preset threshold, the angle sensor controls the ventilation valve to remain open; or, The ventilation device also includes an acceleration sensor, which is electrically connected to the ventilation valve and monitors the acceleration of the carrier; when the acceleration exceeds a preset threshold, the acceleration sensor controls the ventilation valve to close; when the acceleration does not exceed the preset threshold, the acceleration sensor controls the ventilation valve to remain open.

8. A drive system, characterized in that: The driving system comprises at least one engine and the engine fuel system according to any one of claims 1 to 6, wherein the engine fuel system is connected to the engine and provides fuel to the engine.

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