A fuel injector fuel supply fuel injection pipe assembly

Abstract

This invention relates to the field of internal combustion engine fuel supply systems and discloses a fuel injector fuel supply pipe assembly, including a fuel delivery mechanism. The fuel delivery mechanism includes a filter housing, with two inlets and one outlet at the left end of the filter housing. A filter mechanism is connected inside the filter housing. The filter mechanism is located inside the filter housing and includes a short connecting pipe. The left end of the short connecting pipe is fixedly connected to the outlet, and the right end of the short connecting pipe is connected to a filter unit. A check valve unit is connected to both the short connecting pipe and the outlet. This fuel injector fuel supply pipe assembly effectively solves the problem in the prior art where, during winter starts of diesel-powered vehicles, the increased viscosity of diesel fuel prevents the filter element in the filter from filtering properly, causing the bypass valve to open every time the vehicle is started in low temperatures, introducing impurities from the diesel fuel into the fuel injector and aggravating fuel injector wear.

Description

Technical Field

[0001] This invention relates to the field of internal combustion engine fuel supply systems, and more specifically to a fuel injection pipe assembly for fuel injector supply. Background Technology

[0002] The fuel injector fuel line assembly is a key component of the internal combustion engine fuel supply system. It is mainly used to transfer fuel from the fuel pump to each fuel injector. The fuel injector fuel line assembly includes a fuel tank, a filter, a fuel distribution pipe, and fuel lines connecting the three. Fuel is stored in the fuel tank. During operation, the fuel pump first draws fuel from the fuel line to the filter, where the fuel is filtered to remove impurities. The filtered fuel is then transported along the fuel line to the fuel distribution pipe, and finally from the fuel distribution pipe to the fuel injectors.

[0003] The fuel filter mainly consists of four parts: housing, filter element, bypass valve, and check valve. During operation, the filter element adsorbs impurities in the fuel, while the bypass valve automatically opens when the filter element is clogged or under high pressure, allowing unfiltered fuel to pass through to prevent engine damage due to complete fuel line blockage. However, these unfiltered impurities can also enter the fuel injectors, causing wear on their internal components and reducing their lifespan. In some diesel-powered vehicles, when starting in winter, the viscosity of diesel fuel is normal at higher temperatures, and even with some impurities on the filter element, it can still filter the fuel normally. However, if the temperature is low, the viscosity of diesel fuel will increase significantly, resulting in poorer flowability. In this case, the resistance encountered by diesel fuel when passing through the filter element increases. Under these circumstances, the pressure difference across the filter element is large, which may cause the bypass valve to open every time the car is cold-started. If this situation is detected in time, the filter will be replaced, but even then, its lifespan will be reduced. If it is not detected in time, it will increase the probability of introducing impurities into the fuel injectors, accelerating their wear. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a fuel injection pipe assembly for fuel injectors, which effectively solves the problem in existing technologies where, during winter starts of diesel-powered vehicles, the increased viscosity of diesel fuel prevents the filter element in the filter from filtering properly, causing the bypass valve to open every time the vehicle is started in low temperatures, introducing impurities from the diesel fuel into the fuel injector and exacerbating fuel injector wear.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A fuel injector supply line assembly includes:

[0007] The oil delivery mechanism includes a filter housing. The left end of the filter housing is provided with two oil inlets and one oil outlet. The oil inlets are detachably connected to an external fuel tank via a No. 1 oil delivery pipe, and the oil outlet is detachably connected to an external fuel distribution pipe via a No. 2 oil delivery pipe.

[0008] The filter mechanism is located inside the filter housing. The filter mechanism includes a short connecting pipe. The left end of the short connecting pipe is fixedly connected to the oil outlet, and the right end of the short connecting pipe is connected to a filter unit for removing impurities from the fuel. A check valve unit is connected to both the short connecting pipe and the oil outlet.

[0009] The filtration unit includes a central filter tube, with mounting plates fixedly connected to both ends of the central filter tube. Rotary seats are rotatably connected to the center of each of the two mounting plates. A bypass assembly is connected between the two rotary seats. An annular connecting seat is also rotatably connected to the rotary seat. The annular connecting seat is fixedly connected to the inner circumference of the filter housing via a connector. A separation assembly for filtering impurities in the oil is connected to both annular connecting seats.

[0010] Furthermore, the bypass assembly includes an opening and closing seat, which is a funnel-shaped cavity structure with an opening at the right end. The right cylindrical section of the opening and closing seat is fixedly connected to the left end of the right mounting plate. A first piston that cooperates with the right rotating seat is also slidably connected inside the right cylindrical section of the opening and closing seat. The first piston and the opening and closing seat are fixedly connected by a first spring. A central rod is passed through and fixedly connected to the first piston. Both ends of the central rod are located inside the rotating seat and are connected to a rotating module. Multiple slots are opened circumferentially on the outer surface of the left cylindrical section of the opening and closing seat.

[0011] Furthermore, the rotating module includes a cylindrical grooved wheel, which is fixedly connected to the rotating seat via a connecting frame. The cylindrical grooved wheel is rotatably mounted on the central rod. The inner wall of the cylindrical grooved wheel is provided with a corrugated groove, and a contact block that mates with the corrugated groove is fixedly connected to the side wall of the central rod.

[0012] Furthermore, the separation component includes an arc-shaped isolator fixedly connected between two annular connecting seats. The two straight segments of the arc-shaped isolator are made of elastic rubber. A folded filter paper is provided on the outside of the central filter tube. The two ends of the folded filter paper abut against the two annular connecting seats. The folded filter paper has multiple wavy pleats, each pleat including a protruding part and a concave part. Both ends of the folded filter paper are connected to a spreading module. A pushing module that cooperates with the spreading module is connected to the rotating seat.

[0013] Furthermore, the unfolding module includes a backbone, which is fixedly connected to the recessed part of the folded filter paper. An annular track is fixedly connected to the end face of the mounting plate away from the filter element. Multiple sliding parts corresponding to the backbone are slidably connected on the annular track. The sliding parts and the backbone are rotatably connected, and a V-shaped spring is connected between two adjacent sliding parts.

[0014] Furthermore, the pushing module includes a central gear, which is fixedly sleeved on the rotating seat. Two driven gears mesh on the central gear, and both driven gears are rotatably connected to the mounting plate. The positions of the two driven gears correspond to the positions of the two straight segments of the arc-shaped isolator. A cam is fixedly connected to the driven gear, and the cam cooperates with the sliding member.

[0015] Furthermore, the check valve unit includes a partition plate, which is fixedly sleeved on the short connecting pipe and is fixedly connected to the inner circumferential surface of the filter housing. Multiple oil inlets are evenly and uniformly opened along the circumferential direction on the left end face of the partition plate. Each oil inlet is connected to an opening and closing component, wherein two opening and closing components are corresponding to the oil inlet and are connected to a clamping component together with the corresponding oil inlet.

[0016] Furthermore, the opening and closing assembly includes a second piston, a round rod is fixedly connected to the left end, an annular plate is fixedly sleeved on the round rod, the annular plate and the partition are connected by a second spring, a limiting seat that cooperates with the annular plate is fixedly connected to the partition, and the annular plate and the limiting seat are slidably connected.

[0017] Furthermore, the clamping assembly includes an extension rod, which is fixedly connected to the left end of a round rod corresponding to the oil inlet. A push block is fixedly connected to the left end of the extension rod. An annular sealing gasket abuts at the connection between the No. 1 oil pipe and the oil inlet. The inner diameter of the through hole in the annular sealing gasket gradually decreases from left to right. An annular abutting block is fixedly connected to the extension rod via a connecting bracket. The outer diameter of the annular abutting block gradually increases from left to right.

[0018] The technical solution provided by this invention has the following advantages compared with the prior art:

[0019] The folded design of the folded filter paper in this invention can effectively increase the actual working area of ​​the filter paper, thereby extending its service life. Simultaneously, some of the folds of the folded filter paper are located outside the arc-shaped separator to filter impurities in the fuel, while the other folds are located inside the arc-shaped separator in a relatively clean state. When the folds outside the arc-shaped separator cause the first piston to open due to changes in fuel concentration or excessive impurities, the movement of the first piston will cause the clean folds inside the arc-shaped separator to move out of the arc-shaped separator via the unfolding and pushing modules. Simultaneously, it will also cause the folds with residual impurities to enter the arc-shaped separator and fold, thus achieving the effect of automatically replacing the folded filter paper. While extending the service life of the folded filter paper, it can also reduce the frequency of the second piston movement caused by temperature changes, thereby reducing the amount of unfiltered fuel directly entering the central filter tube and reducing damage to the fuel injector. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0021] Figure 1 This is a three-dimensional structural schematic diagram of a fuel injection pipe assembly for supplying fuel to a fuel injector according to the present invention.

[0022] Figure 2 This is a three-dimensional structural diagram of the filter housing, filter unit, and check valve unit in the fuel injection pipe assembly for fuel injector supply according to the present invention.

[0023] Figure 3 This is a perspective sectional view of the filter housing, filter unit, and check valve unit in the fuel injection pipe assembly for fuel injector supply according to the present invention.

[0024] Figure 4 For the present invention Figure 3 A magnified view of a section at point A in the middle;

[0025] Figure 5 This is a three-dimensional structural diagram of the separation component in the fuel injection pipe assembly for fuel injector supply according to the present invention.

[0026] Figure 6 This is a three-dimensional structural diagram of the filter unit and check valve unit in the fuel injection pipe assembly for fuel injector supply according to the present invention.

[0027] Figure 7 This is a three-dimensional structural diagram of the bypass component in the fuel injection pipe assembly for fuel injector supply according to the present invention.

[0028] Figure 8 For the present invention Figure 3 A magnified view of a section at point B in the middle;

[0029] Figure 9 For the present invention Figure 3 A magnified view of a section at point C.

[0030] The labels in the diagram represent: 1. Filter housing; 11. Oil inlet; 12. Oil outlet; 2. Oil supply pipe No. 1; 3. Oil supply pipe No. 2; 4. Short connecting pipe; 5. Filter unit; 51. Central filter tube; 52. Mounting plate; 53. Rotary seat; 54. Bypass assembly; 541. Opening and closing seat; 542. Piston No. 1; 543. Spring No. 1; 544. Central rod; 545. Rotating module; 5451. Cylindrical groove wheel; 5452. Corrugated groove; 5453. Contact block; 55. Annular connecting seat; 56. Separation assembly; 561. Arc-shaped isolation component; 562. Folded filter paper; 563. Spreading module; 5631. Rib; 5632. Sliding component; 5633. V-shaped spring; 564. Pushing module; 5641. Central gear; 5642. Driven gear; 5643. Cam; 6. Check valve unit; 61. Partition plate; 62. Opening and closing assembly; 621. Piston No. 2; 622. Round rod; 623. Annular plate; 624. Spring No. 2; 625. Limiting seat; 63. Clamping assembly; 631. Extension rod; 632. Push block; 633. Annular sealing gasket; 634. Annular abutment block. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] The present invention will be further described below with reference to embodiments.

[0033] Example: See Figure 1 - Figure 9 A fuel injector fuel supply line assembly, comprising:

[0034] The oil delivery mechanism includes a filter housing 1. The left end of the filter housing 1 is provided with two oil inlets 11 and one oil outlet 12. The oil inlets 11 are detachably connected to an external fuel tank through a first oil delivery pipe 2, and the oil outlet 12 is detachably connected to an external fuel distribution pipe through a second oil delivery pipe 3.

[0035] The filter mechanism is located inside the filter housing 1. The filter mechanism includes a short connecting pipe 4. The left end of the short connecting pipe 4 is fixedly connected to the oil outlet 12. The right end of the short connecting pipe 4 is connected to a filter unit 5 for removing impurities from the fuel. A check valve unit 6 is connected to both the short connecting pipe 4 and the oil outlet 12.

[0036] The filter unit 5 includes a central filter tube 51, with mounting plates 52 fixedly connected to both ends of the central filter tube 51. A rotating seat 53 is rotatably connected to the center of each of the two mounting plates 52. A bypass assembly 54 is connected between the two rotating seats 53. The bypass assembly 54 is activated when the filter unit 5 is blocked to prevent the fuel in the fuel distribution pipe from being emptied. An annular connecting seat 55 is also rotatably connected to the rotating seat 53. The annular connecting seat 55 is fixedly connected to the inner circumference of the filter housing 1 through a connector. A separation assembly 56 for filtering impurities in the oil is connected to both annular connecting seats 55.

[0037] In practice, when fuel needs to be delivered to the fuel injector, the fuel in the fuel tank is pumped to the filter housing 1 through the No. 1 fuel supply pipe 2 and the fuel inlet 11 by the external fuel pump. The fuel entering the filter housing 1 is first filtered by the separation component 56 to remove impurities, then enters the central filter pipe 51, and finally enters the fuel distribution pipe through the central filter pipe 51, the short connecting pipe 4 and the fuel outlet 12.

[0038] The bypass assembly 54 includes an opening and closing seat 541, which is a funnel-shaped cavity structure with an opening at the right end. The right cylindrical section of the opening and closing seat 541 is fixedly connected to the left end of the right mounting plate 52. A first piston 542 that cooperates with the right rotating seat 53 is also slidably connected in the right cylindrical section of the opening and closing seat 541. The first piston 542 and the opening and closing seat 541 are fixedly connected by a first spring 543. A central rod 544 is passed through and fixedly connected to the first piston 542. Both ends of the central rod 544 are located in the rotating seat 53 and are connected to a rotating module 545. Multiple slots are opened circumferentially on the outer surface of the left cylindrical section of the opening and closing seat 541.

[0039] The rotating module 545 includes a cylindrical grooved wheel 5451, which is fixedly connected to the rotating seat 53 via a connecting frame. The cylindrical grooved wheel 5451 is rotatably sleeved on the central rod 544. The inner wall of the cylindrical grooved wheel 5451 is provided with a corrugated groove 5452, and the side wall of the central rod 544 is fixedly connected with a contact block 5453 that cooperates with the corrugated groove 5452.

[0040] The separation component 56 includes an arc-shaped isolation member 561, which is fixedly connected between two annular connecting seats 55. The two straight segments of the arc-shaped isolation member 561 are made of elastic rubber. A folded filter paper 562 is provided on the outside of the central filter tube 51. The two ends of the folded filter paper 562 abut against the two annular connecting seats 55. The folded filter paper 562 has multiple wavy pleats, each pleat including a protruding part and a concave part. Both ends of the folded filter paper 562 are connected to a spreading module 563. A pushing module 564 that cooperates with the spreading module 563 is connected to the rotating seat 53.

[0041] The unfolding module 563 includes a core rod 5631, which is fixedly connected to the recessed portion of the folded filter paper 562. An annular track is fixedly connected to the end face of the mounting plate 52 away from the filter element. Multiple sliding members 5632 corresponding to the core rod 5631 are slidably connected on the annular track. The sliding members 5632 and the core rod 5631 are rotatably connected, and a V-shaped spring sheet 5633 is connected between two adjacent sliding members 5632. The V-shaped spring sheet 5633 is always in an elastic compression state to ensure that the distance between the two elastic members located inside and outside the arc-shaped isolation member 561 is equal, thereby making each fold of the folded filter paper 562 unfold evenly and fully within a certain limit. The fold angle of the part of the folded filter paper 562 located between the arc-shaped isolation members 561 is smaller than that of the part located outside the arc-shaped isolation members 561.

[0042] The pushing module 564 includes a central gear 5641, which is fixedly sleeved on the rotating seat 53. Two driven gears 5642 mesh on the central gear 5641. Both driven gears 5642 are rotatably connected to the mounting plate 52, and the positions of the two driven gears 5642 correspond to the positions of the two straight segments of the arc-shaped isolator 561. A cam 5643 is fixedly connected to the driven gear 5642, and the cam 5643 cooperates with the sliding member 5632.

[0043] The check valve unit 6 includes a partition plate 61, which is fixedly sleeved on the short connecting pipe 4 and is fixedly connected to the inner circumferential surface of the filter housing 1. The left end face of the partition plate 61 has a plurality of oil inlets evenly opened along the circumference. Each oil inlet is connected to an opening and closing component 62, wherein two opening and closing components 62 correspond to the oil inlet 11 and are connected to a clamping component 63 together with the corresponding oil inlet 11.

[0044] The opening and closing assembly 62 includes a second piston 621, and a round rod 622 is fixedly connected to the left end. An annular piece 623 is fixedly sleeved on the round rod 622. The annular piece 623 and the partition plate 61 are connected by a second spring 624. The second spring 624 is always in an elastic compression state. A limiting seat 625 that cooperates with the annular piece 623 is fixedly connected to the partition plate 61. The annular piece 623 and the limiting seat 625 are slidably connected.

[0045] The clamping assembly 63 includes an extension rod 631, which is fixedly connected to the left end of a round rod 622 corresponding to the oil inlet 11. A push block 632 is fixedly connected to the left end of the extension rod 631. An annular sealing gasket 633 abuts against the connection between the No. 1 oil pipe 2 and the oil inlet 11. The inner diameter of the through hole in the annular sealing gasket 633 gradually decreases from left to right. An annular abutting block 634 is fixedly connected to the extension rod 631 through a connecting bracket. The outer diameter of the annular abutting block 634 gradually increases from left to right.

[0046] In practice, the fuel pump draws fuel from the tank along the No. 1 fuel supply pipe 2, the fuel inlet 11, and the short connecting pipe 4 into the cavity area formed by the filter housing 1, the partition 61, and the short connecting pipe 4. As fuel is continuously input, the hydraulic pressure in the cavity increases, causing the No. 2 piston 621, the round rod 622, and the annular plate 623 to slide synchronously to the right. A gap is created between the No. 2 piston 621 and the fuel inlet, and fuel enters the cavity formed by the partition 61, the pleated filter paper 562, and the filter housing 1 through the gap. Then, the fuel in this cavity passes through the pleated filter paper 562 into the central filter pipe 51, and then enters the external fuel distributor along the short connecting pipe 4, the fuel outlet 12, and the No. 2 fuel supply pipe 3, thereby cleaning the fuel. In this state, the No. 1 piston 542, under the action of the No. 1 spring 543, is always pressed against the cylindrical section on the right side of the opening and closing seat 541, sealing the opening and closing seat 541.

[0047] Some of the impurities filtered out will remain on the folds of the folded filter paper 562 on the outside of the arc-shaped separator 561. The folds inside the arc-shaped separator 561 have a smaller fold angle than the folds on the outside, and the distance between their depressions and protrusions is also larger than the distance between their depressions and protrusions inside the arc-shaped separator 561. Therefore, the protrusions will abut against the inner wall of the arc-shaped segment of the arc-shaped separator 561, and the folds of the folded filter paper 562 inside the arc-shaped separator 561 are in a relatively clean state.

[0048] Impurities remaining on the outer folds of the pleated filter paper 562 located on the arc-shaped separator 561 will affect the filtration effect of the pleated filter paper 562 before accumulating to a certain amount. However, under normal temperature conditions, the pleated filter paper 562 performs normal filtration. But after the temperature drops to a certain level, the viscosity of some types of fuel (especially diesel) will increase significantly. During filtration, the impurities remaining on the surface of the pleated filter paper 562 will increase the flow resistance of the fuel, thereby increasing the hydraulic pressure in the baffle 61, the pleated filter paper 562 and the filter housing 1. This will further compress the first spring 543, and the first piston 542 will slide to the left into the conical section of the opening and closing seat 541. At this time, the fuel can directly enter the central filter tube 51 along the right rotating seat 53.

[0049] As piston 542 moves to the left, it drives center rod 544 to move to the left in sync, which in turn drives contact block 5453 to move to the left in sync. The leftward movement of contact block 5453 causes cylindrical groove wheel 5451 to rotate through its corrugated groove, which in turn drives center gear 5641 to rotate. The rotation of center gear 5641 drives driven gear 5642 to rotate in sync, which in turn drives cam 5643 to rotate in sync. When both cams 5643 rotate, they will contact the corresponding sliding member 5632. The rotation of one cam 5643 causes one side of sliding member 5632 to disengage from the arc-shaped isolator 561. During this process, the two straight segments of the arc-shaped isolator 561 will deform, and the cleaned folds on the folded filter paper 562 can slide out from the arc-shaped isolator 561. The rotation of another cam 5643 causes the sliding member 5632 on the other side to slide into the arc-shaped separator 561. As a result, the folds of the pleated filter paper 562 with impurities fold and gather into the arc-shaped separator 561. At the same time, since the folds of each pleated filter paper 562 in the arc-shaped separator 561 are relatively independent, the impurities entering will not contaminate the clean folds that were originally located in the pleated filter paper 562. This process is repeated, which can automatically replace the folds of the pleated filter paper 562 in the arc-shaped separator 561. Since there are no impurities attached to the clean folds, the flow resistance is relatively small. Therefore, even if the fuel becomes viscous due to low temperature, it can still pass through the pleated filter paper 562 and enter the central filter tube 51 normally, and the opening and closing seat 541 will not be opened again.

[0050] The above-mentioned automatic pleat replacement process also occurs automatically when impurities accumulate to a certain amount on the external pleats of the arc-shaped separator 561, causing the pleated filter paper 562 to fail to function properly. This reduces the frequency of the second piston 621 opening, thereby improving the utilization rate and service life of the pleated filter paper 562.

[0051] Meanwhile, when the folded filter paper 562 has too many impurities or the fuel becomes viscous due to low temperature, resulting in increased fuel flow resistance, the internal hydraulic pressure of the filter housing 1 will also increase, and the pressure on the No. 1 oil supply pipe 2 and the oil inlet 11 will also increase. Excessive hydraulic pressure may affect the sealing performance at this point. Therefore, a clamping component 63 is set at the connection between the two. When the fuel enters the oil inlet 11 and pushes the No. 2 piston 621 to open, the annular pressing block 634 will be moved to the right through the round rod 622, the extension rod 631, the push block 632 and the connecting frame, pressing the annular sealing gasket 633 against the connection between the No. 1 oil supply pipe 2 and the oil inlet 11, thereby enhancing the sealing performance at the connection.

[0052] It is worth noting that the above-mentioned fuel injector supply line assembly has the following advantages:

[0053] Advantage 1: The folded design of the folded filter paper 562 effectively increases the actual working area of ​​the filter paper, thereby extending its service life. Simultaneously, some of the folds of the folded filter paper 562 are located outside the arc-shaped separator 561 to filter impurities in the fuel, while the other folds are folded inside the arc-shaped separator 561 in a relatively clean state. When the folds outside the arc-shaped separator 561 cause the first piston 542 to open due to changes in fuel concentration or excessive impurities, the movement of the first piston 542 will cause the clean folds inside the arc-shaped separator 561 to move out of the arc-shaped separator 561 via the unfolding module 563 and the pushing module 564. Simultaneously, it will also cause folds with residual impurities to enter the arc-shaped separator 561 and fold, thus achieving the effect of automatically replacing the working end of the folded filter paper 562. While extending the service life of the folded filter paper 562, it can also reduce the frequency of movement of the second piston 621 due to temperature changes, thereby reducing the amount of unfiltered fuel directly entering the central filter tube 51 and reducing damage to the fuel injector.

[0054] Advantage 2: The folds of the folded filter paper 562 inside the arc-shaped separator 561 have smaller fold angles than the folds on the outside, and the distance between its depressions and protrusions is also larger than the distance between the depressions and protrusions of the folds inside the arc-shaped separator 561. Therefore, its protrusions will abut against the inner wall of the arc-shaped section of the arc-shaped separator 561. Under the action of the V-shaped spring piece 5633, each fold of the folded filter paper 562 inside the arc-shaped separator 561 is fully and evenly unfolded within a certain limit. Each fold is relatively independent, so it is in a relatively clean state afterward. Therefore, the impurities that enter will not contaminate the clean folds of the folded filter paper 562 that were originally located therein.

[0055] Thirdly, when the pleated filter paper 562 has too many impurities or the fuel becomes viscous due to low temperature, resulting in increased fuel flow resistance, the internal hydraulic pressure of the filter housing 1 will also increase, and the pressure on the No. 1 fuel supply pipe 2 and the fuel inlet 11 will also increase. Therefore, a clamping component 63 is set at the connection between the two. When the fuel enters the fuel inlet 11 and pushes the No. 2 piston 621 to open, the round rod 622, the extension rod 631, the push block 632 and the connecting frame will drive the annular pressing block 634 to move to the right, pressing the annular sealing gasket 633 against the connection between the No. 1 fuel supply pipe 2 and the fuel inlet 11, thereby enhancing the sealing performance of the connection.

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fuel injection pipe assembly for fuel injector supply, characterized in that, include: The oil delivery mechanism includes a filter housing (1), and the left end of the filter housing (1) is provided with two oil inlets (11) and one oil outlet (12). The oil inlets (11) are detachably connected to the external oil tank through a first oil delivery pipe (2), and the oil outlet (12) is detachably connected to the external fuel distribution pipe through a second oil delivery pipe (3). The filter mechanism is located inside the filter housing (1). The filter mechanism includes a short connecting pipe (4). The left end of the short connecting pipe (4) is fixedly connected to the oil outlet (12). The right end of the short connecting pipe (4) is connected to a filter unit (5) for removing impurities in the fuel. A check valve unit (6) is connected to both the short connecting pipe (4) and the oil outlet (12). The filter unit (5) includes a central filter tube (51), both ends of which are fixedly connected to mounting plates (52). A rotating seat (53) is rotatably connected to the center of each of the two mounting plates (52). A bypass assembly (54) is connected between the two rotating seats (53). An annular connecting seat (55) is also rotatably connected to the rotating seat (53). The annular connecting seat (55) is fixedly connected to the inner circumference of the filter housing (1) through a connector. A separation assembly (56) for filtering impurities in the oil is connected to both annular connecting seats (55). The bypass assembly (54) includes an opening and closing seat (541), which is a funnel-shaped cavity structure with an opening at the right end. The right cylindrical section of the opening and closing seat (541) is fixedly connected to the left end of the right mounting plate (52). A first piston (542) that cooperates with the right rotating seat (53) is also slidably connected in the right cylindrical section of the opening and closing seat (541). The first piston (542) and the opening and closing seat (541) are fixedly connected by a first spring (543). A central rod (544) is connected through and fixedly connected to the first piston (542). Both ends of the central rod (544) are located in the rotating seat (53) and are connected to a rotating module (545). Multiple slots are opened circumferentially on the outer surface of the left cylindrical section of the opening and closing seat (541). The rotating module (545) includes a cylindrical groove wheel (5451), which is fixedly connected to the rotating seat (53) through a connecting frame. The cylindrical groove wheel (5451) is rotatably sleeved on the central rod (544). The inner wall of the cylindrical groove wheel (5451) is provided with a corrugated groove (5452), and the side wall of the central rod (544) is fixedly connected with a contact block (5453) that cooperates with the corrugated groove (5452). The separation component (56) includes an arc-shaped isolation member (561), which is fixedly connected between two annular connecting seats (55). The two straight segments of the arc-shaped isolation member (561) are made of elastic rubber. A folded filter paper (562) is provided on the outside of the central filter tube (51). The two ends of the folded filter paper (562) abut against the two annular connecting seats (55). The folded filter paper (562) has multiple wavy pleats, each pleat including a protruding part and a concave part. Both ends of the folded filter paper (562) are connected to a spreading module (563). A pushing module (564) that cooperates with the spreading module (563) is connected to the rotating seat (53). The unfolding module (563) includes a core rod (5631), which is fixedly connected to the recessed part of the folded filter paper (562). An annular track is fixedly connected to the end face of the mounting plate (52) away from the filter element. Multiple sliding parts (5632) corresponding to the core rod (5631) are slidably connected on the annular track. The sliding parts (5632) and the core rod (5631) are rotatably connected, and a V-shaped spring piece (5633) is connected between two adjacent sliding parts (5632). The pushing module (564) includes a central gear (5641), which is fixedly sleeved on the rotating seat (53). Two driven gears (5642) mesh on the central gear (5641). Both driven gears (5642) are rotatably connected to the mounting plate (52), and the positions of the two driven gears (5642) correspond to the positions of the two straight segments of the arc-shaped isolator (561). A cam (5643) is fixedly connected to the driven gear (5642), and the cam (5643) cooperates with the sliding member (5632).

2. The fuel injection pipe assembly for fuel injector supply according to claim 1, characterized in that: The check valve unit (6) includes a partition (61), which is fixedly sleeved on the short connecting pipe (4) and is fixedly connected to the inner circumferential surface of the filter housing (1). Multiple oil inlets are evenly opened along the circumferential direction on the left end face of the partition (61), and each oil inlet is connected to an opening and closing assembly (62). Two opening and closing assemblies (62) correspond to the oil inlet (11) and are connected together with a clamping assembly (63) on the corresponding oil inlet (11).

3. The fuel injection pipe assembly for fuel injector supply according to claim 2, characterized in that: The opening and closing assembly (62) includes a second piston (621), and a round rod (622) is fixedly connected to the left end. An annular piece (623) is fixedly sleeved on the round rod (622). The annular piece (623) and the partition plate (61) are connected by a second spring (624). A limiting seat (625) that cooperates with the annular piece (623) is fixedly connected on the partition plate (61). The annular piece (623) and the limiting seat (625) are slidably connected.

4. The fuel injection pipe assembly for fuel injector supply according to claim 3, characterized in that: The clamping assembly (63) includes an extension rod (631), which is fixedly connected to the left end of a round rod (622) corresponding to the oil inlet (11). A push block (632) is fixedly connected to the left end of the extension rod (631). An annular sealing gasket (633) abuts against the connection between the No. 1 oil pipe (2) and the oil inlet (11). The inner diameter of the through hole in the annular sealing gasket (633) gradually decreases from left to right. An annular abutting block (634) is fixedly connected to the extension rod (631) through a connecting bracket. The outer diameter of the annular abutting block (634) gradually increases from left to right.

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