A fuel filter with integrated hydrocarbon injection function

Abstract

The present invention relates to the technical field of engine fuel systems, and specifically discloses a fuel filter with integrated hydrocarbon injection function. The fuel filter comprises a spin-on filter and a filter base installed on the spin-on filter; the spin-on filter input end is connected to the oil supply pipeline, the spin-on filter output end is connected to the fuel system through a first oil outlet channel, the spin-on filter output end is connected to the hydrocarbon injection unit through a second oil outlet channel, a fuel control valve is provided on the second oil outlet channel, the fuel control valve is used to connect or block the second oil outlet channel, and the air intake channel can be connected to the air supply pipeline and the part of the second oil outlet channel between the fuel control valve and the hydrocarbon injection unit. By redesigning the oil channel, the space occupied by the subsequent hydrocarbon injection unit is reduced, the fuel that has passed through the spin-on filter is used to regenerate the DPF, the risk of failure of the hydrocarbon injection unit is reduced, and the working efficiency of the hydrocarbon injection unit is improved.

Description

Technical Field

[0001] The invention relates to the technical field of engine fuel systems, and in particular to a fuel filter with integrated hydrocarbon injection function. Background Art

[0002] Diesel engines produce carbon particles during the incomplete combustion of the fuel and air mixture; at the same time, the sulfur content and high injection pressure in diesel will also increase the generation of particles, which will appear in the form of soot (nanoparticles of black carbon). In addition to stricter regulations on the emission of nitrogen oxides and PM, the National Phase VI Motor Vehicle Pollutant Emission Standard also stipulates emission limits for CO, HC, NH3, etc., and also increases the monitoring of PM emissions. The generation conditions of nitrogen oxides and PM are inherently contradictory. While reducing the nitrogen oxide value through the EGR system, the emission of PM particles will increase. In order to deal with the emission of PM particles, a DPF (Diesel Particulate Filter) is added to the post-treatment system to deal with and capture PM. However, when the DPF captures a certain amount of PM (i.e., carbon load), it needs to increase the emission temperature to regenerate the DPF, so a hydrocarbon injection system is produced. The main purpose of the hydrocarbon injection system is to inject a certain amount of fuel into the exhaust pipe of the hydrocarbon injection unit during regeneration to increase the regeneration temperature of the DPF.

[0003] Taking into account the strict emission requirements of the national sixth stage motor vehicle pollutant emission standards, the vehicle's after-treatment system is stacked with multiple processing units such as EGR, DOC, DPF, SCR, ASC, and the addition of the AHI hydrocarbon injection system. The additional piping system configuration has high space requirements and will also increase additional costs. Summary of the invention

[0004] The object of the present invention is to provide a fuel filter with an integrated hydrocarbon injection function so as to utilize fuel to regenerate the DPF.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A fuel filter with integrated hydrocarbon injection function, comprising a spin-on filter and a filter base; the filter base is installed on the spin-on filter, and the filter base is provided with a first oil outlet channel, an air intake channel and a second oil outlet channel; the spin-on filter input end is connected to an oil supply pipeline, the spin-on filter output end is connected to a fuel system through the first oil outlet channel, the spin-on filter output end is connected to a hydrocarbon injection unit through the second oil outlet channel, a fuel control valve is provided on the second oil outlet channel, the fuel control valve is used to connect or block the second oil outlet channel, and the air intake channel can be connected to the air supply pipeline and the part of the second oil outlet channel located between the fuel control valve and the hydrocarbon injection unit.

[0007] Wherein, a pressure sensor is installed on the filter base, and the pressure sensor is used to detect the pressure of the fuel flowing out of the output end of the spin-on filter.

[0008] Furthermore, a pressure detection pipeline is provided on the filter base, the pressure detection pipeline is connected to the output end of the spin-on filter, and a pressure sensor is provided on the pressure detection pipeline.

[0009] Furthermore, the second oil outlet passage is connected to the pressure detection pipeline and the hydrocarbon injection unit, and the first oil outlet passage is connected to the pressure detection pipeline and the fuel system.

[0010] Preferably, the pressure detection pipeline is connected to a central screw, the central screw is a tubular structure, the outer side wall of the central screw is provided with a first thread, the spin-on filter output end is provided with a second thread, and the first thread is cooperatively connected with the second thread.

[0011] Preferably, a fuel metering valve is further provided on the second oil outlet passage, and the fuel metering valve is located between the fuel control valve and the hydrocarbon injection unit, and is used to adjust the flow rate of the second oil outlet passage.

[0012] Further, the air intake passage is connected to the second fuel outlet passage between the fuel control valve and the fuel metering valve.

[0013] Preferably, an air control valve is provided on the air intake passage, and the air control valve is used to connect or block the air intake passage.

[0014] Preferably, an oil inlet channel is provided on the filter base, and the oil inlet channel is connected with the oil supply pipeline and the spin-on filter input end.

[0015] Preferably, a base positioning hole is provided on the filter base, and a connecting piece can pass through the base positioning hole to fix the fuel filter with integrated hydrocarbon injection function in an external environment.

[0016] Beneficial effects of the present invention:

[0017] The fuel filter with integrated hydrocarbon injection function can integrate the structure applied to the hydrocarbon injection unit with the fuel filter body by redesigning the oil passage in the filter base, so that the fuel discharged from the spin filter can be used to the maximum extent for DPF regeneration. By using the on-off setting of the fuel control valve and the air intake passage, it can be ensured that when the hydrocarbon injection unit needs fuel, the fuel discharged from the output end of the spin filter can flow from the first oil outlet passage to the fuel system and from the second oil outlet passage to the hydrocarbon injection unit by blocking the fuel control valve passage and the air intake passage, thereby ensuring the timely supply of fuel; after the demand for fuel ends, the second oil outlet passage and the output end of the spin filter are blocked by disconnecting the fuel control valve and connecting the air intake passage, so that the air intake passage and the second oil outlet passage located between the fuel control valve and the hydrocarbon injection unit are connected, so that the subsequent purge action of the air supply pipeline can be completed smoothly, and the residual fuel can be purged in time, which can improve the stability of the second oil outlet passage in long-term use, thereby reducing the occurrence of failures. The above structure not only reduces the space occupied by the subsequent hydrocarbon injection unit device, but also reduces the complexity of the system layout related to the fuel filter and the subsequent hydrocarbon injection unit, and reduces the manufacturing cost of the corresponding system; at the same time, the fuel entering the hydrocarbon injection unit is clean fuel filtered by the spin-on filter. The above design reduces the risk of failure of the hydrocarbon injection unit and improves the working efficiency of the hydrocarbon injection unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a fuel filter with integrated hydrocarbon injection function provided by an embodiment of the present invention;

[0019] Figure 2 yes Figure 1 Cross-sectional view of the AA plane;

[0020] Figure 3 yes Figure 1 Cross-sectional view of the middle BB plane;

[0021] Figure 4 yes Figure 1 Cross-sectional view of the CC plane.

[0022] In the figure:

[0023] 100, filter base; 101, base positioning hole; 110, air inlet passage; 120, second oil outlet passage; 130, oil inlet passage; 131, first connecting hole; 140, first oil outlet passage; 150, center screw;

[0024] 210, pressure sensor; 220, fuel control valve; 230, air control valve; 240, fuel metering valve; 300, spin-on filter. DETAILED DESCRIPTION

[0025] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0029] like Figure 1-Figure 4As shown, this embodiment provides a fuel filter with integrated hydrocarbon injection function, including a spin-on filter 300 and a filter base 100; the filter base 100 is installed on the spin-on filter 300, and the filter base 100 is provided with a first oil outlet channel 140, an air intake channel 110 and a second oil outlet channel 120; the input end of the spin-on filter 300 is connected to the oil supply pipeline, the output end of the spin-on filter 300 is connected to the fuel system through the first oil outlet channel 140, and the output end of the spin-on filter 300 is connected to the hydrocarbon injection unit through the second oil outlet channel 120, and a fuel control valve 220 is provided on the second oil outlet channel 120, and the fuel control valve 220 is used to connect or block the second oil outlet channel 120, and the air intake channel 110 can be connected to the air supply pipeline and the part of the second oil outlet channel 120 located between the fuel control valve 220 and the hydrocarbon injection unit.

[0030] The fuel filter with integrated hydrocarbon injection function can integrate the structure used for the hydrocarbon injection unit with the fuel filter body by redesigning the filter base 100, thereby making the most of the fuel discharged from the spin-on filter 300 for regeneration of the DPF. By utilizing the on-off setting of the fuel control valve 220 and the air intake channel 110, it can be ensured that when the hydrocarbon injection unit needs fuel, the fuel control valve 220 is opened and the air intake channel 110 is blocked, so that the fuel discharged from the output end of the spin-on filter 300 can flow from the first oil outlet channel 140 to the fuel system and from the second oil outlet channel 120 to the hydrocarbon injection unit at the same time, thereby ensuring the timely supply of fuel; after the demand for fuel ends, the second oil outlet channel 120 and the output end of the spin-on filter 300 are blocked by disconnecting the fuel control valve 220 and connecting the air intake channel 110, so that the air intake channel 110 is connected to the part of the second oil outlet channel 120 located between the fuel control valve 220 and the hydrocarbon injection unit, so that the subsequent purging action of the air supply pipeline can be completed smoothly. Timely purging of residual fuel can improve the stability of the second oil outlet channel 120 in long-term use, thereby reducing the occurrence of failures. The above structure not only reduces the space occupied by the subsequent hydrocarbon injection unit device, but also reduces the complexity of the system layout related to the fuel filter and the subsequent hydrocarbon injection unit, and reduces the manufacturing cost of the corresponding system; at the same time, the fuel entering the hydrocarbon injection unit is clean fuel filtered by the spin-on filter 300. The above design reduces the risk of failure of the hydrocarbon injection unit and improves the working efficiency of the hydrocarbon injection unit.

[0031] Preferably, the fuel filter with integrated hydrocarbon injection function is also communicatively connected to an external control system. When the external control system receives a signal indicating that the DPF carbon load is full, it controls the fuel filter to supply fuel to the hydrocarbon injection unit, thereby performing a regeneration operation of the DPF. The setting of the external control system greatly improves the degree of automation of the fuel filter.

[0032] Specifically, a filter element is provided inside the spin-on filter 300, and the spin-on filter 300 can complete the filtering operation of the fuel with the help of the filter paper on the filter element; when the fuel filter with integrated hydrocarbon injection function is operating normally, the fuel will enter the input end of the spin-on filter 300 from the filter base 100, and after being filtered by the filter element inside the spin-on filter 300, the clean fuel will flow out from the output end of the filter base 100, and then enter the fuel system or the hydrocarbon injection unit.

[0033] In this embodiment, a pressure sensor 210 is installed on the filter base 100, and the pressure sensor 210 is used to detect the pressure of the fuel flowing out of the output end of the spin-on filter 300. Regardless of whether the hydrocarbon injection unit is connected to the spin-on filter 300, the fuel flowing out of the output end of the spin-on filter 300 after being filtered by the spin-on filter 300 will flow through the pressure sensor 210. The above design allows customers to monitor the fuel pressure in real time through the pressure sensor 210.

[0034] Specifically, the pressure sensor 210 can be linked to the high-pressure oil pump in the above-mentioned fuel system. By means of the pressure sensor 210 and the high-pressure oil pump being respectively connected to the external control system in communication, the external control system can control the pressure control valve in the high-pressure oil pump according to the signal sent by the pressure sensor 210, thereby realizing real-time monitoring of the opening of the high-pressure oil pump.

[0035] Furthermore, a pressure detection pipeline is provided on the filter base 100, and the pressure detection pipeline is connected to the output end of the spin-on filter 300, and a pressure sensor 210 is provided on the pressure detection pipeline. The pressure sensor 210 can obtain the fuel pressure flowing out of the output end of the spin-on filter 300 by detecting the fuel pressure flowing through the pressure detection pipeline. The above structure is simple and reliable, ensuring that the fuel pressure flowing out of the output end of the spin-on filter 300 can be accurately measured. Specifically, the two ends of the pressure detection pipeline are respectively connected to the pressure sensor 210 and the output end of the spin-on filter 300.

[0036] Furthermore, the second oil outlet channel 120 is connected to the pressure detection pipeline and the hydrocarbon injection unit, and the first oil outlet channel 140 is connected to the pressure detection pipeline and the fuel system. The above design enables the pipelines flowing to the fuel system and the hydrocarbon injection unit to be connected to the pressure detection pipeline, thereby ensuring that the data measured by the pressure sensor 210 can be simultaneously applied to the subsequent processing of the fuel system and the hydrocarbon injection unit.

[0037] Preferably, the pressure detection pipeline is connected to a central screw 150, which is a tubular structure. The outer wall of the central screw 150 is provided with a first thread, and the output end of the spin-on filter 300 is provided with a second thread, and the first thread and the second thread are matched and connected. The setting of the central screw 150 not only enables the spin-on filter 300 to be detachably connected to the filter base 100, but also ensures the sealing effect of the connection between the pressure detection pipeline and the output end of the spin-on filter 300. The above structure is simple and reliable, easy to disassemble and assemble, and has low production cost.

[0038] Specifically, the central screw 150 is inserted into an end of the pressure detection pipe away from the pressure sensor 210 .

[0039] In this embodiment, a fuel metering valve 240 is also provided on the second oil outlet channel 120. The fuel metering valve 240 is located between the fuel control valve 220 and the hydrocarbon injection unit, and is used to adjust the flow of the second oil outlet channel 120. The fuel metering valve 240 can be used to adjust the fuel flow in the second oil outlet channel 120. The above design is effective and reliable, ensuring that the flow of the fuel discharged from the second oil outlet channel 120 is adjustable, so that the fuel can be better used to achieve the regeneration operation of the DPF. By the external control system being simultaneously connected to the fuel metering valve 240 and the pressure sensor 210 in communication, the external control system can control the fuel metering valve 240 according to the signal sent by the pressure sensor 210, thereby achieving real-time monitoring of the flow of the second oil outlet channel 120. At the same time, the purge action of the air supply pipeline on the residual fuel in the second oil outlet channel can also improve the stability of the fuel metering valve 240 in long-term use.

[0040] Furthermore, the air intake channel 110 is connected to the second oil outlet channel 120 between the fuel control valve 220 and the fuel metering valve 240. The air intake channel 110 is connected to the second oil outlet channel 120 through the second connecting hole. The above design makes the fuel metering valve 240 on the second oil outlet channel 120 not located between the second connecting hole and the fuel control valve 220. Since there is no need to consider the need to set components on this section of the second oil outlet channel 120, the length between the second connecting hole and the fuel control valve 220 can be effectively reduced, so that the part of the second oil outlet channel 120 that is difficult to be completely purged due to the lack of a smooth passage can be effectively adjusted and controlled.

[0041] In this embodiment, an air control valve 230 is provided on the air intake passage 110, and the air control valve 230 is used to connect or block the air intake passage 110. The above design is simple and reliable, and can ensure that the connection and blocking operations of the air intake passage 110 can be completed smoothly and efficiently.

[0042] Specifically, the pressure sensor 210, the fuel control valve 220, the fuel metering valve 240 and the air control valve 230 are respectively connected to the external control system for communication, and the external control system can control the corresponding components to perform corresponding actions by processing the above-mentioned received signals.

[0043] In other implementations of this embodiment, the fuel filter further includes a control module, which replaces the external control system, and has the same connection relationship with the external control system and the same functions, which are not described in detail here.

[0044] Preferably, the filter base 100 is provided with an oil inlet channel 130, which connects the oil supply pipeline and the input end of the spin-on filter 300. Specifically, the oil inlet channel 130 is provided with a first connecting hole 131, which connects the oil inlet channel 130 and the input end of the spin-on filter 300.

[0045] Furthermore, there are multiple first oil outlet channels 140 and multiple oil inlet channels 130. The above design provides multiple paths for the cleaned fuel flowing from the oil supply pipeline to the fuel filter and the clean fuel flowing from the fuel filter to the fuel system, which greatly improves the working efficiency of the fuel filter.

[0046] In this embodiment, a base positioning hole 101 is provided on the filter base 100, and a connecting piece can pass through the base positioning hole 101 to fix the fuel filter with integrated hydrocarbon injection function in an external device. The provision of the base positioning hole 101 improves the stability of the fuel filter when installed in an external environment, and ensures that the fuel filter can operate stably.

[0047] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A fuel filter with integrated hydrocarbon injection function, characterized in that: include: Spin-on filter (300); A filter base (100) is installed on the spin-on filter (300), and the filter base (100) is provided with a first oil outlet channel (140), an air intake channel (110), and a second oil outlet channel (120); The input end of the spin-on filter (300) is in communication with the oil supply pipeline, the output end of the spin-on filter (300) is in communication with the fuel system through the first oil outlet channel (140), the output end of the spin-on filter (300) is in communication with the hydrocarbon injection unit through the second oil outlet channel (120), a fuel control valve (220) is provided on the second oil outlet channel (120), the fuel control valve (220) is used to connect or block the second oil outlet channel (120), and the air intake channel (110) can be connected to and disconnected from the air supply pipeline and the second oil outlet channel (120) located between the fuel control valve (220) and the hydrocarbon injection unit; A pressure sensor (210) is installed on the filter base (100), and the pressure sensor (210) is used to detect the pressure of the fuel flowing out of the output end of the spin-on filter (300); The air intake passage (110) is provided with an air control valve (230), and the air control valve (230) is used to connect or block the air intake passage (110).

2. The fuel filter with integrated hydrocarbon injection function according to claim 1, characterized in that: The filter base (100) is provided with a pressure detection pipeline, the pressure detection pipeline is connected to the output end of the spin-on filter (300), and a pressure sensor (210) is provided on the pressure detection pipeline.

3. The fuel filter with integrated hydrocarbon injection function according to claim 2, characterized in that: The second oil outlet passage (120) is connected to the pressure detection pipeline and the hydrocarbon injection unit, and the first oil outlet passage (140) is connected to the pressure detection pipeline and the fuel system.

4. The fuel filter with integrated hydrocarbon injection function according to claim 2, characterized in that: The pressure detection pipeline is connected to a central screw (150), the central screw (150) is a tubular structure, the outer wall of the central screw (150) is provided with a first thread, the output end of the spin-on filter (300) is provided with a second thread, and the first thread is matched with the second thread.

5. The fuel filter with integrated hydrocarbon injection function according to claim 1, characterized in that: The second oil outlet passage (120) is also provided with a fuel metering valve (240), which is located between the fuel control valve (220) and the hydrocarbon injection unit and is used to adjust the flow rate of the second oil outlet passage (120).

6. The fuel filter with integrated hydrocarbon injection function according to claim 5, characterized in that: The air intake passage (110) is connected to the second oil outlet passage (120) between the fuel control valve (220) and the fuel metering valve (240).

7. The fuel filter with integrated hydrocarbon injection function according to claim 1, characterized in that: The filter base (100) is provided with an oil inlet channel (130), and the oil inlet channel (130) is connected to the oil supply pipeline and the input end of the spin-on filter (300).

8. The fuel filter with integrated hydrocarbon injection function according to any one of claims 1 to 7, characterized in that: The filter base (100) is provided with a base positioning hole (101), and a connecting piece can pass through the base positioning hole (101) to fix the fuel filter with integrated hydrocarbon injection function in an external environment.

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