Oil rail, engine and vehicle

Abstract

The utility model provides an oil rail, an engine and a vehicle, and the oil rail comprises a rail body which is provided with a plurality of oil outlets which are sequentially arranged at intervals along the length direction of the rail body; the multiple oil outlet seats are arranged in one-to-one correspondence with the multiple oil outlets, all the oil outlet seats are arranged on the rail body in a sleeving mode, and all the oil outlet seats are provided with containing cavities communicating with the corresponding oil outlets; the multiple flow limiters and the multiple oil outlet bases are arranged in a one-to-one correspondence mode, all the flow limiters are installed in the containing cavities, outer shells of all the flow limiters comprise hexagonal heads, and all the containing cavities comprise first cylindrical cavities used for containing the corresponding hexagonal heads; the plurality of O-shaped sealing rings are arranged in one-to-one correspondence with the plurality of flow limiters and the plurality of oil outlet seats, and each O-shaped sealing ring is clamped between the corresponding hexagonal head and the corresponding first cylindrical cavity, so that the problem that the centering performance of the flow limiters in the oil outlet seats of the machined long oil rail in the prior art is poor is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, and more specifically, to an oil rail, an engine and a vehicle. Background Technique

[0002] In the field of marine diesel engines, a machined long oil rail is used to meet the fuel anti-leakage requirements of ship regulations. A double-layer oil rail is manufactured by machining, and the machining length of some oil rails has reached more than 1000 mm.

[0003] The restrictor is a mechanical component set according to the requirements of ship regulations to prevent excessive fuel injection. In the common rail system pipeline, the restrictor is arranged in the oil outlet seat of the machined long oil rail and is located at one end of the oil outlet seat close to the rail body. An elastic corrugated gasket is installed at the end of the restrictor. The elastic corrugated gasket has limited restraint on the radial movement of the restrictor. The radial movement of the restrictor mainly depends on the fit clearance of 0.2 mm between the outer peripheral surface of the restrictor and the inner wall surface of the oil outlet seat, and the restrictor is prone to poor centering. In addition, whether the gasket is well centered during the installation of the elastic corrugated gasket will also have a certain impact on the centering of the restrictor.

[0004] Among them, the centering consistency means that theoretically the center lines of the oil outlet ports of the oil rail should be in the same plane. However, due to the long length of the oil rail, the oil outlet seat is sleeved on the outer casing and is positioned by a pre-positioning screw so that the oil rail can slightly shake, and due to the poor positioning of the restrictor in the oil outlet seat and other reasons, the centering consistency is poor.

[0005] The oil rail is fixed at the installation position through four combined brackets. The assembly steps of the four combined brackets are relatively complex, and the assembly performance in the narrow space of the engine is poor. Moreover, the four combined brackets are all surrounding brackets that surround the cylindrical rail body of the machined long oil rail, and it is impossible to only position each oil outlet seat, and thus it is impossible to ensure the centering consistency of each oil outlet port.

[0006] In summary, the machined long oil rail is used to supply oil to the high-pressure oil pipe. There are two sealing settings between them. If the oil outlet seat or the restrictor on the rail body is poorly positioned, the centering consistency will be poor, resulting in the failure of the sealing fit with the high-pressure oil pipe pier head. Once harsh working conditions such as high rail pressure are reached, high-pressure fuel leakage problems will occur. Summary of the Utility Model

[0007] The main purpose of the utility model is to provide an oil rail, an engine and a vehicle to solve the problem of poor centering of the restrictor in the oil outlet seat of the existing machined long oil rail.

[0008] In order to achieve the above object, according to the first aspect of the present utility model, an oil rail is provided, which includes: a rail body, on which a plurality of oil outlets are arranged, and the plurality of oil outlets are arranged at intervals in sequence along the length direction of the rail body; a plurality of oil outlet seats, which are arranged in one-to-one correspondence with the plurality of oil outlets, each oil outlet seat is sleeved on the rail body and is located at the corresponding oil outlet, and each oil outlet seat is provided with a receiving cavity communicating with the corresponding oil outlet; a plurality of restrictors, which are arranged in one-to-one correspondence with the plurality of oil outlet seats, each restrictor is installed in the receiving cavity, and the outer shell of each restrictor includes a hexagonal head, and each receiving cavity includes a first cylindrical cavity for receiving the corresponding hexagonal head; a plurality of O-ring seals, which are arranged in one-to-one correspondence with the plurality of restrictors and the plurality of oil outlet seats, and each O-ring seal is clamped between the corresponding hexagonal head and the corresponding first cylindrical cavity.

[0009] Further, an annular installation groove is provided on the inner wall surface of the first cylindrical cavity, the outer side of the O-ring seal contacts the groove bottom surface of the annular installation groove, and the inner side of the O-ring seal contacts each side edge angle of the hexagonal head and is spaced from each side surface of the hexagonal head; and / or the inner diameter of the O-ring seal is smaller than the distance between any two relatively arranged side edge angles of the hexagonal head and larger than the distance between any two relatively arranged side surfaces of the hexagonal head; and / or the minimum distance between the end of the hexagonal head away from the rail body and the end surface on the side of the first cylindrical cavity away from the rail body is 0.3 mm; and / or the volume ratio of the O-ring seal is 71% to 77%, the compression ratio of the O-ring seal is 20% to 25%, and the hardness of the O-ring seal is 70±5HA.

[0010] Further, the oil outlet seat includes a first seat body and a second seat body that are connected to each other to jointly enclose the receiving cavity. One end of the first seat body is sleeved on the rail body, and the other end of the first seat body is inserted into the second seat body; the first cylindrical cavity includes a first cavity provided in the first seat body and a second cavity provided in the second seat body, the inner diameter of the first cavity is smaller than the inner diameter of the second cavity, and the inner diameter of the first cavity is larger than the distance between any two relatively arranged side edge angles of the hexagonal head; wherein, the annular installation groove is located in the second cavity.

[0011] Further, the receiving cavity includes a second cylindrical cavity that communicates with the first cylindrical cavity and is located at the end of the first cylindrical cavity close to the rail body; the restrictor includes a first restricting portion, a part of the first restricting portion away from the rail body is inserted into the outer shell, and the other part of the first restricting portion close to the rail body is a first cylindrical section, and the first cylindrical section is inserted into the second cylindrical cavity and is in clearance fit with the second cylindrical cavity; wherein, the clearance A between the outer peripheral surface of the first cylindrical section and the inner wall surface of the second cylindrical cavity is 0 mm to 0.15 mm.

[0012] Further, the outer housing includes a second cylindrical section located between the hexagonal head and the first cylindrical section; the accommodating cavity includes a third cylindrical cavity located between the first cylindrical cavity and the second cylindrical cavity, and the second cylindrical section is inserted into the third cylindrical cavity and is in clearance fit with the third cylindrical cavity; wherein, the clearance B between the outer peripheral surface of the second cylindrical section and the inner wall surface of the third cylindrical cavity is 0.1 mm to 0.3 mm.

[0013] Further, the fuel rail further includes: a plurality of fixing brackets, which are correspondingly arranged on a plurality of oil outlet seats one by one; a plurality of first fastening components, which are correspondingly arranged with the plurality of fixing brackets one by one, and the first ends of the respective fixing brackets are connected to the respective oil outlet seats through the corresponding first fastening components; a plurality of second fastening components, which are correspondingly arranged with the plurality of fixing brackets one by one, and the second ends of the respective fixing brackets are connected to the connection position to be installed through the corresponding second fastening components.

[0014] Further, the outer surface of each oil outlet seat includes an installation side surface parallel to the length direction of the rail body for installing the fixing bracket, and each fixing bracket includes a connected first support block and a second support plate; wherein, the first support block includes a first contact surface and a second contact surface which are spaced apart and both parallel to the installation side surface, the first contact surface is located on the side close to the installation side surface of the second contact surface, and the first support block is connected to the corresponding oil outlet seat through the corresponding first fastening component; the second support plate is perpendicular to the installation side surface and is located on the side of the first support block away from the oil outlet seat, and the second support plate is connected to the connection position to be installed through the corresponding second fastening component.

[0015] Further, the first fastening component includes a stud, a nut and two spherical washers. A first through hole for the stud to pass through is provided on the first support block, and a first threaded hole is provided on the oil outlet seat. The first end of the stud passes through the first through hole and is tightened in the first threaded hole. A nut is installed at the second end of the stud. One spherical washer is sleeved on the stud and is located between the first support block and the oil outlet seat, and the other spherical washer is sleeved on the stud and is located between the first support block and the nut; and / or the second fastening component includes a bolt and a gasket. A second through hole for the bolt to pass through is provided on the second support plate, and a second threaded hole is provided at the connection position to be installed. The threaded end of the bolt passes through the second through hole and is tightened in the second threaded hole. The gasket is sleeved on the bolt and is located between the second support plate and the nut end of the bolt.

[0016] According to the second aspect of the present invention, an engine is provided, including the above-mentioned fuel rail.

[0017] According to the third aspect of the present invention, a vehicle is provided, including the above-mentioned engine.

[0018] Applying the technical solution of the present utility model, the fuel rail of the present utility model includes: a rail body, on which a plurality of oil outlets are provided, and the plurality of oil outlets are arranged at intervals in sequence along the length direction of the rail body; a plurality of oil outlet seats, which are arranged in one-to-one correspondence with the plurality of oil outlets, each oil outlet seat is sleeved on the rail body and is located at the corresponding oil outlet, and each oil outlet seat is provided with a receiving cavity communicating with the corresponding oil outlet; a plurality of restrictors, which are arranged in one-to-one correspondence with the plurality of oil outlet seats, each restrictor is installed in the receiving cavity, and the outer shell of each restrictor includes a hexagonal head, and each receiving cavity includes a first cylindrical cavity for receiving the corresponding hexagonal head; a plurality of O-ring seals, which are arranged in one-to-one correspondence with the plurality of restrictors and the plurality of oil outlet seats, and each O-ring seal is clamped between the corresponding hexagonal head and the corresponding first cylindrical cavity. In this way, by arranging an O-ring seal between the receiving cavity of the oil outlet seat and the hexagonal head of the restrictor, the restrictor is centered, ensuring the centering of the restrictor, solving the problem of poor centering of the restrictor in the oil outlet seat of the machined long fuel rail in the prior art, and can play a certain damping effect, effectively avoiding fuel leakage, improving the safety and reliability of the fuel system, ensuring the integrity of the fuel system under extreme pressure, avoiding the decline of engine performance and potential safety hazards caused by fuel leakage, and significantly improving the reliability and fuel efficiency of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0020] Figure 1 shows a schematic structural diagram of an embodiment of a fuel rail according to the present utility model;

[0021] Figure 2 shows Figure 1 a cross-sectional view of the fuel rail shown;

[0022] Figure 3 shows Figure 1 a cross-sectional view of the fuel rail at the oil outlet seat shown;

[0023] Figure 4 shows Figure 1 a cross-sectional view of the oil outlet seat of the fuel rail shown;

[0024] Figure 5 shows Figure 1 a cross-sectional view of the fuel rail at the oil outlet seat shown without including the restrictor and the O-ring seal;

[0025] Figure 6 shows Figure 1Schematic structural diagram of the flow limiter of the fuel rail shown

[0026] Figure 7 Shows Figure 1 Front view of the flow limiter of the fuel rail shown

[0027] Figure 8 Shows Figure 1 Partial enlarged view of the fixed bracket of the fuel rail shown in one direction

[0028] Figure 9 Shows Figure 1 Partial enlarged view of the fixed bracket of the fuel rail shown without including the second fastening assembly

[0029] Figure 10 Shows Figure 1 Partial enlarged view of the fixed bracket of the fuel rail shown in another direction

[0030] Among them, the above-mentioned drawings include the following reference numerals

[0031] 1, rail body

[0032] 2, oil outlet seat; 21, accommodation cavity; 210, annular mounting groove; 211, first cylindrical cavity; 212, first cavity; 213, second cavity; 214, second cylindrical cavity; 215, third cylindrical cavity; 216, fourth cylindrical cavity; 22, first seat body; 23, second seat body; 24, mounting side

[0033] 3, flow limiter; 31, external housing; 311, hexagonal head; 312, second cylindrical section; 32, first flow limiting part; 321, first cylindrical section; 33, second flow limiting part; 331, third cylindrical section

[0034] 4, O-ring

[0035] 5, fixed bracket; 51, first support block; 52, second support plate

[0036] 6, first fastening assembly; 61, stud; 62, nut; 63, spherical washer

[0037] 7, second fastening assembly; 71, bolt; 72, gasket Detailed implementation manners

[0038] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments

[0039] As Figures 1 to 10As shown in the figure, the present utility model provides an oil rail, including: a rail body 1, on which a plurality of oil outlets are arranged, and the plurality of oil outlets are arranged at intervals in sequence along the length direction of the rail body 1; a plurality of oil outlet seats 2, which are arranged in one-to-one correspondence with the plurality of oil outlets, each oil outlet seat 2 is sleeved on the rail body 1 and is located at the corresponding oil outlet, and each oil outlet seat 2 is provided with a receiving cavity 21 communicated with the corresponding oil outlet; a plurality of restrictors 3, which are arranged in one-to-one correspondence with the plurality of oil outlet seats 2, each restrictor 3 is installed in the receiving cavity 21, and the outer shell 31 of each restrictor 3 includes a hexagonal head 311, and each receiving cavity 21 includes a first cylindrical cavity 211 for receiving the corresponding hexagonal head 311; a plurality of O-ring seals 4, which are arranged in one-to-one correspondence with the plurality of restrictors 3 and the plurality of oil outlet seats 2, and each O-ring seal 4 is clamped between the corresponding hexagonal head 311 and the corresponding first cylindrical cavity 211.

[0040] In this way, by arranging the O-ring seal 4 between the receiving cavity 21 of the oil outlet seat 2 and the hexagonal head 311 of the restrictor 3, a centering effect is exerted on the restrictor 3, ensuring the centering of the restrictor 3, solving the problem of poor centering of the restrictor in the oil outlet seat of the machined long oil rail in the prior art, and can play a certain vibration damping effect, effectively avoiding fuel leakage, improving the safety and reliability of the fuel system, being able to ensure the integrity of the fuel system under extreme pressure, avoiding the decline of engine performance and safety hazards caused by fuel leakage, and significantly improving the reliability and fuel efficiency of the engine.

[0041] As Figures 3 to 5 shown in the figure, an annular installation groove 210 is provided on the inner wall surface of the first cylindrical cavity 211, the outer side of the O-ring seal 4 contacts the groove bottom surface of the annular installation groove 210, and the inner side of the O-ring seal 4 contacts the side edges of each side of the hexagonal head 311 and is spaced from each side surface of the hexagonal head 311; and / or the inner diameter of the O-ring seal 4 is less than the distance between any two relatively arranged side edges of the hexagonal head 311 and greater than the distance between any two relatively arranged side surfaces of the hexagonal head 311.

[0042] In this way, for the smoothness of the leakage oil passage, the O-ring seal 4 only contacts the six-edge of the hexagonal head 311, and does not seal the inner wall surface of the first cylindrical cavity 211 and the entire gap between the hexagonal head 311, so that the O-ring seal 4 does not block the leakage oil passage.

[0043] Specifically, the minimum distance between the end of the hexagonal head 311 away from the rail body 1 and the end surface on the side of the first cylindrical cavity 211 away from the rail body 1 is 0.3 mm.

[0044] Among them, the volume ratio of the O-ring 4 is 71% to 77%, the compression ratio of the O-ring 4 is 20% to 25%, and the hardness of the O-ring 4 is 70±5HA.

[0045] Preferably, the distance between any two relatively arranged side edges of the hexagonal head 311 is 30.1mm, and its tolerance is H9 (0mm to 0.052mm); the volume ratio of the O-ring 4 is 74%, the compression ratio of the O-ring 4 is 23.3%, the hardness of the O-ring 4 is 70±5HA, and the size of the O-ring 4 is 30±0.34×2.65±0.09 (GB3452.1).

[0046] In this way, by precisely controlling the size and performance parameters of the O-ring 4, its good sealing performance is ensured when it withstands high-pressure fuel impact, and it is applicable to various harsh engine operating environments, such as high temperature, high pressure, and high vibration conditions, extending the service life of the fuel rail. During the operation of the engine, this precisely controlled sealing ring can maintain a stable shape under high temperature and high pressure, effectively ensuring the centering and stability of the restrictor 3, which enables the fuel rail to operate continuously and efficiently in extreme environments, ensuring fuel injection accuracy and engine performance under high-speed driving and aggressive driving conditions.

[0047] As Figures 3 to 5 shown, the oil outlet seat 2 includes a first seat body 22 and a second seat body 23 that are connected to each other to jointly enclose a receiving cavity 21. One end of the first seat body 22 is sleeved on the rail body 1, and the other end of the first seat body 22 is inserted into the second seat body 23; the first cylindrical cavity 211 includes a first cavity 212 provided in the first seat body 22 and a second cavity 213 provided in the second seat body 23. The inner diameter of the first cavity 212 is smaller than the inner diameter of the second cavity 213, and the inner diameter of the first cavity 212 is larger than the distance between any two relatively arranged side edges of the hexagonal head 311; among them, the annular mounting groove 210 is located in the second cavity 213.

[0048] As Figures 3 to 7 shown, the receiving cavity 21 includes a second cylindrical cavity 214 that is communicated with the first cylindrical cavity 211 and is located at one end of the first cylindrical cavity 211 close to the rail body 1; the restrictor 3 includes a first restricting portion 32. A part of the first restricting portion 32 away from the rail body 1 is inserted into the external housing 31, and another part of the first restricting portion 32 close to the rail body 1 is a first cylindrical section 321. The first cylindrical section 321 is inserted into the second cylindrical cavity 214 and has a clearance fit with the second cylindrical cavity 214; among them, the clearance A between the outer peripheral surface of the first cylindrical section 321 and the inner wall surface of the second cylindrical cavity 214 is 0mm to 0.15mm.

[0049] Specifically, the outer diameter of the outer peripheral surface of the first cylindrical section 321 is 27 mm, and its tolerance is f9 (-0.072 mm to -0.02 mm); the inner diameter of the inner wall surface of the second cylindrical cavity 214 is 27 mm, and its tolerance is H9 (0 mm to 0.052 mm).

[0050] In this way, by reducing the gap between the first cylindrical section 321 and the second cylindrical cavity 214, the centering, stability, and positioning accuracy of the flow restrictor 3 in the receiving cavity 21 are ensured, further improving the sealing performance of the fuel rail. It is applicable to engines with high requirements for fuel injection accuracy, ensuring the reliable operation of the fuel rail under various working conditions, enabling precise fuel injection, and improving the power output and response speed of the engine.

[0051] As Figures 3 to 7 shown, the outer housing 31 includes a second cylindrical section 312 located between the hexagonal head 311 and the first cylindrical section 321; the receiving cavity 21 includes a third cylindrical cavity 215 located between the first cylindrical cavity 211 and the second cylindrical cavity 214. The second cylindrical section 312 is inserted into the third cylindrical cavity 215 and is in clearance fit with the third cylindrical cavity 215. Among them, the gap B between the outer peripheral surface of the second cylindrical section 312 and the inner wall surface of the third cylindrical cavity 215 is 0.1 mm to 0.3 mm.

[0052] Specifically, the outer diameter of the outer peripheral surface of the second cylindrical section 312 is 30 mm, and its tolerance is f9 (-0.1 mm to 0 mm); the inner diameter of the inner wall surface of the third cylindrical cavity 215 is 30.1 mm, and its tolerance is H9 (0 mm to 0.052 mm).

[0053] In this way, the centering of the flow restrictor 3 is ensured, and the buffering effect of the flow restrictor 3 when subjected to external impacts is achieved. At the same time, it also helps with heat dissipation. It is applicable to engines operating under complex working conditions, can effectively cope with the impacts and high temperatures caused by frequent starts and stops, ensures the long-term stable operation of the fuel rail, and reduces the maintenance frequency and cost.

[0054] In addition, the flow restrictor 3 further includes a second flow restricting portion 33. One end of the second flow restricting portion 33 is installed inside the outer housing 31, and the other end of the second flow restricting portion 33 is located outside the outer housing 31. The second flow restricting portion 33 includes a third cylindrical section 331 located on the side of the outer housing 31 away from the rail body 1. A fourth cylindrical cavity 216 for inserting the third cylindrical section 331 is provided on the second seat body 23 of the oil outlet seat 2, and the inner wall surface of the fourth cylindrical cavity 216 is in clearance fit with the outer peripheral surface of the third cylindrical section 331.

[0055] As Figure 1 and Figures 8 to 9As shown, the fuel rail further includes: a plurality of fixing brackets 5, which are respectively arranged on a plurality of oil outlet seats 2 in a one-to-one correspondence; a plurality of first fastening components 6, which are respectively arranged corresponding to the plurality of fixing brackets 5, and the first end of each fixing bracket 5 is connected to the corresponding oil outlet seat 2 through the corresponding first fastening component 6; a plurality of second fastening components 7, which are respectively arranged corresponding to the plurality of fixing brackets 5, and the second end of each fixing bracket 5 is connected to the connection position at the installation position through the corresponding second fastening component 7.

[0056] In this way, by directly installing the fixing bracket 5 on the oil outlet seat 2, compared with the setting of the combined bracket in the prior art that surrounds the cylindrical rail body, it not only enhances the centering of the oil outlet seat and the installation stability of the fuel rail, solves the problem of poor centering consistency that easily occurs at each oil outlet of the machined long fuel rail in the prior art, but also improves the assemblability of the fuel rail, and improves its anti-vibration performance during the operation of the engine. It is applicable to various types of engines, such as automotive engines, marine engines, and aviation engines, ensuring the reliable operation of the fuel rail under various working conditions, so that the fuel rail can maintain a good position and function under complex and changeable working conditions.

[0057] As Figures 8 to 9 shown, the outer surface of each oil outlet seat 2 includes an installation side surface 24 parallel to the length direction of the rail body 1 for installing the fixing bracket 5. Each fixing bracket 5 includes a connected first support block 51 and a second support plate 52; wherein, the first support block 51 includes a first contact surface and a second contact surface that are spaced apart and both parallel to the installation side surface 24, the first contact surface is on the side close to the installation side surface 24 of the second contact surface, and the first support block 51 is connected to the corresponding oil outlet seat 2 through the corresponding first fastening component 6; the second support plate 52 is perpendicular to the installation side surface 24 and is located on the side of the first support block 51 away from the oil outlet seat 2, and the second support plate 52 is connected to the connection position at the installation position through the corresponding second fastening component 7.

[0058] In this way, the design not only improves the installation accuracy of the fuel rail, but also facilitates the adjustment and positioning of the fixing bracket 5, is applicable to engines that require precise control of the fuel rail position, ensures the accurate alignment between the fuel rail and the injector, improves the efficiency and accuracy of fuel injection, improves the combustion efficiency, reduces fuel consumption, and at the same time reduces emissions, which is of great significance for improving vehicle performance and environmental performance.

[0059] Specifically, the first fastening assembly 6 includes a stud 61, a nut 62 and two spherical washers 63. A first through hole for the stud 61 to pass through is provided on the first support block 51, and a first threaded hole is provided on the oil outlet seat 2. The first end of the stud 61 passes through the first through hole and is tightened in the first threaded hole. A nut 62 is installed at the second end of the stud 61. One spherical washer 63 is sleeved on the stud 61 and is located between the first support block 51 and the oil outlet seat 2, and the other spherical washer 63 is sleeved on the stud 61 and is located between the first support block 51 and the nut 62; and / or the second fastening assembly 7 includes a bolt 71 and a gasket 72. A second through hole for the bolt 71 to pass through is provided on the second support plate 52, and a second threaded hole is provided at the installation position to be installed. The threaded end of the bolt 71 passes through the second through hole and is tightened in the second threaded hole. The gasket 72 is sleeved on the bolt 71 and is located between the second support plate 52 and the nut end of the bolt 71.

[0060] In this way, not only is the stable connection between the fixing bracket 5 and the oil outlet seat 2 and the installation position ensured, but also the vibration during the operation of the engine is absorbed through the elastic deformation of the spherical washer 63 and the gasket 72. It is applicable to engines under various working conditions, such as urban bus vehicles, heavy trucks and construction machinery. During the frequent start and brake processes, it can effectively absorb the impacts caused by road unevenness and engine vibration, etc., improve the service life of the oil rail and the operation stability of the engine, and improve the reliability of the vehicle and the comfort of passengers.

[0061] The utility model provides an engine, including the above-mentioned oil rail.

[0062] In this way, due to its excellent sealing performance and installation stability, the oil rail of the utility model can significantly improve the fuel efficiency, anti-vibration performance and environmental protection performance of the engine, reduce fuel leakage, lower the failure rate of the engine, and is applicable to various types of engines, such as automobile engines, ship engines and aero engines, etc., providing an effective solution for improving the engine performance and reducing the maintenance cost.

[0063] The utility model also provides a vehicle, including the above-mentioned engine.

[0064] In this way, it can ensure the stable operation of the vehicle under various working conditions, improve the fuel economy and environmental protection performance of the vehicle, and at the same time provide a guarantee for the safety and driving experience of the vehicle. It is applicable to various types of vehicles, such as passenger cars, commercial vehicles and special vehicles, etc., making an important contribution to improving the overall performance of the vehicle and reducing the operation cost of the vehicle.

[0065] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0066] The oil rail of the present utility model includes: a rail body 1, on which a plurality of oil outlets are provided, and the plurality of oil outlets are arranged at intervals in sequence along the length direction of the rail body 1; a plurality of oil outlet seats 2, which are arranged in one-to-one correspondence with the plurality of oil outlets, each oil outlet seat 2 is sleeved on the rail body 1 and is located at the corresponding oil outlet, and each oil outlet seat 2 is provided with a receiving cavity 21 communicating with the corresponding oil outlet; a plurality of restrictors 3, which are arranged in one-to-one correspondence with the plurality of oil outlet seats 2, each restrictor 3 is installed in the receiving cavity 21, and the outer shell 31 of each restrictor 3 includes a hexagonal head 311, and each receiving cavity 21 includes a first cylindrical cavity 211 for receiving the corresponding hexagonal head 311; a plurality of O-ring seals 4, which are arranged in one-to-one correspondence with the plurality of restrictors 3 and the plurality of oil outlet seats 2, and each O-ring seal 4 is clamped between the corresponding hexagonal head 311 and the corresponding first cylindrical cavity 211. In this way, by arranging the O-ring seal 4 between the receiving cavity 21 of the oil outlet seat 2 and the hexagonal head 311 of the restrictor 3, a centering effect is exerted on the restrictor 3, ensuring the centering of the restrictor 3, solving the problem of poor centering of the restrictor in the oil outlet seat of the machined long oil rail in the prior art, and can play a certain vibration damping effect, effectively avoiding fuel leakage, improving the safety and reliability of the fuel system, being able to ensure the integrity of the fuel system under extreme pressure, avoiding the decline of engine performance and safety hazards caused by fuel leakage, and significantly improving the reliability and fuel efficiency of the engine.

[0067] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0068] Unless otherwise specifically stated, the relative arrangements of the components and steps set forth in these embodiments, numerical expressions, and numerical values do not limit the scope of the present application. At the same time, it should be understood that for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0069] In the description of the present application, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description. Without contrary description, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present application; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0070] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "upper...", etc. can be used here to describe the spatial positional relationship between a device or feature shown in the drawings and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation other than the orientation described in the drawings for the device. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0071] In addition, it should be noted that the use of words such as "first", "second", etc. to limit components is only for the convenience of differentiating the corresponding components. Without separate declaration, the above words have no special meaning. Therefore, it should not be construed as a limitation on the protection scope of the present application.

[0072] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A fuel rail, characterized in that: include: A rail body (1), wherein a plurality of oil outlets are arranged on the rail body (1), and the plurality of oil outlets are arranged in sequence and at intervals along the length direction of the rail body (1); A plurality of oil outlet seats (2), the plurality of oil outlet seats (2) being arranged in one-to-one correspondence with the plurality of oil outlets, each of the oil outlet seats (2) being sleeved on the rail body (1) and being located at the corresponding oil outlet, and each of the oil outlet seats (2) being provided with a receiving cavity (21) communicating with the corresponding oil outlet; a plurality of flow limiters (3), the plurality of flow limiters (3) being arranged in one-to-one correspondence with the plurality of oil outlet seats (2), each of the flow limiters (3) being installed in the accommodating cavity (21), the outer shell (31) of each of the flow limiters (3) comprising a hexagonal head (311), and each of the accommodating cavities (21) comprising a first cylindrical cavity (211) for accommodating the corresponding hexagonal head (311); A plurality of O-type sealing rings (4), the plurality of O-type sealing rings (4) being arranged in one-to-one correspondence with the plurality of flow limiters (3) and the plurality of oil outlet seats (2), and each of the O-type sealing rings (4) being sandwiched between a corresponding hexagonal head (311) and a corresponding first cylindrical cavity (211).

2. The fuel rail according to claim 1, characterized in that: An annular mounting groove (210) is provided on the inner wall surface of the first cylindrical cavity (211), the outer side of the O-ring (4) contacts the bottom surface of the annular mounting groove (210), the inner side of the O-ring (4) contacts the side edges of the hexagonal head (311) and is spaced apart from the side surfaces of the hexagonal head (311); and / or The inner diameter of the O-ring (4) is smaller than the distance between any two oppositely disposed side corners of the hexagonal head (311) and larger than the distance between any two oppositely disposed side faces of the hexagonal head (311); and / or The minimum distance between the end of the hexagonal head (311) away from the rail body (1) and the end surface of the first cylindrical cavity (211) away from the rail body (1) is 0.3 mm; and / or The volume ratio of the O-type sealing ring (4) is 71% to 77%, the compression ratio of the O-type sealing ring (4) is 20% to 25%, and the hardness of the O-type sealing ring (4) is 70±5HA.

3. The fuel rail according to claim 2, characterized in that: The oil outlet seat (2) comprises a first seat body (22) and a second seat body (23) which are connected to each other to jointly enclose the accommodating cavity (21); one end of the first seat body (22) is sleeved on the rail body (1), and the other end of the first seat body (22) is inserted into the second seat body (23); The first cylindrical cavity (211) comprises a first cavity (212) arranged on the first seat body (22) and a second cavity (213) arranged on the second seat body (23); the inner diameter of the first cavity (212) is smaller than the inner diameter of the second cavity (213); and the inner diameter of the first cavity (212) is larger than the distance between any two oppositely arranged side edges of the hexagonal head (311); Wherein, the annular mounting groove (210) is located in the second cavity (213).

4. The fuel rail according to claim 1, characterized in that: The accommodating cavity (21) comprises a second cylindrical cavity (214) which is in communication with the first cylindrical cavity (211) and is located at an end of the first cylindrical cavity (211) close to the rail body (1); The flow limiter (3) comprises a first flow limiter (32), a portion of the first flow limiter (32) away from the rail body (1) is inserted into the outer shell (31), and another portion of the first flow limiter (32) close to the rail body (1) is a first cylindrical section (321), and the first cylindrical section (321) is inserted into the second cylindrical cavity (214) and is clearance-matched with the second cylindrical cavity (214); Wherein, a gap A between the outer peripheral surface of the first cylindrical section (321) and the inner wall surface of the second cylindrical cavity (214) is 0 mm to 0.15 mm.

5. The fuel rail according to claim 4, characterized in that: The outer shell (31) includes a second cylindrical section (312) located between the hexagonal head (311) and the first cylindrical section (321); The accommodating cavity (21) comprises a third cylindrical cavity (215) located between the first cylindrical cavity (211) and the second cylindrical cavity (214); the second cylindrical segment (312) is inserted into the third cylindrical cavity (215) and is in clearance fit with the third cylindrical cavity (215); Wherein, a gap B between the outer peripheral surface of the second cylindrical section (312) and the inner wall surface of the third cylindrical cavity (215) is 0.1 mm to 0.3 mm.

6. The fuel rail according to any one of claims 1 to 5, characterized in that The oil rail also includes: A plurality of fixed brackets (5), wherein the plurality of fixed brackets (5) are arranged on the plurality of oil outlet seats (2) in a one-to-one correspondence; a plurality of first fastening assemblies (6), the plurality of first fastening assemblies (6) being arranged in one-to-one correspondence with the plurality of fixing brackets (5), and the first end of each fixing bracket (5) being connected to the corresponding oil outlet seat (2) via the corresponding first fastening assemblies (6); A plurality of second fastening components (7), wherein the plurality of second fastening components (7) are arranged in one-to-one correspondence with the plurality of fixing brackets (5), and the second end of each of the fixing brackets (5) is connected to a position to be installed via a corresponding second fastening component (7).

7. The fuel rail according to claim 6, characterized in that: The outer surface of each of the oil outlet seats (2) comprises a mounting side surface (24) parallel to the length direction of the rail body (1) for mounting the fixing bracket (5), and each of the fixing brackets (5) comprises a first supporting block (51) and a second supporting plate (52) connected to each other; wherein: The first support block (51) comprises a first contact surface and a second contact surface which are arranged at intervals and are both parallel to the installation side surface (24), the first contact surface being located on a side of the second contact surface close to the installation side surface (24), and the first support block (51) is connected to the corresponding oil outlet seat (2) via the corresponding first fastening assembly (6); The second support plate (52) is perpendicular to the installation side surface (24) and is located on a side of the first support block (51) away from the oil outlet seat (2). The second support plate (52) is connected to the location to be installed via the corresponding second fastening assembly (7).

8. The fuel rail according to claim 7, characterized in that: The first fastening assembly (6) comprises a stud (61), a nut (62) and two spherical washers (63); the first support block (51) is provided with a first through hole for the stud (61) to pass through; the oil outlet seat (2) is provided with a first threaded hole; the first end of the stud (61) passes through the first through hole and is screwed into the first threaded hole; the second end of the stud (61) is mounted with the nut (62); one of the spherical washers (63) is sleeved on the stud (61) and is located between the first support block (51) and the oil outlet seat (2); the other of the spherical washers (63) is sleeved on the stud (61) and is located between the first support block (51) and the nut (62); and / or The second fastening assembly (7) comprises a bolt (71) and a gasket (72); the second support plate (52) is provided with a second through hole for the bolt (71) to pass through; a second threaded hole is provided at the position to be installed; the threaded end of the bolt (71) passes through the second through hole and is tightened in the second threaded hole; the gasket (72) is sleeved on the bolt (71) and is located between the second support plate (52) and the nut end of the bolt (71).

9. An engine, characterized in that: The fuel rail comprises the fuel rail according to any one of claims 1 to 8.

10. A vehicle, characterized in that: Comprising the engine as claimed in claim 9.

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