Camshaft bearing cap, engine, vehicle, and manufacturing method for camshaft bearing cap

Abstract

The present disclosure relates to a camshaft bearing cap, an engine, a vehicle, and a manufacturing method for the camshaft bearing cap, belonging to the technical field of automobiles. The camshaft bearing cap comprises a camshaft bearing lower cap and a camshaft bearing upper cap, wherein the camshaft bearing lower cap is mounted on a cylinder head of an engine cylinder, and the camshaft bearing upper cap is mounted on the camshaft bearing lower cap; a first surface of the camshaft bearing lower cap is provided with two lower mounting half-grooves, and a second surface of the camshaft bearing upper cap is provided with two upper mounting half-grooves; the two lower mounting half-grooves each cooperate with one upper mounting half-groove, so as to form two bearing mounting bores; a bearing cap main oil passage is provided between the first surface and the second surface, the bearing cap main oil passage being in communication with the bearing mounting bores; and the camshaft bearing lower cap is provided with a bearing cap oil inlet passage, the bearing cap oil inlet passage being in communication with the bearing cap main oil passage and an oil outlet of a cylinder head main oil passage of the cylinder head. The present disclosure can simplify the manufacturing process of the camshaft bearing cap.

Description

Camshaft bearing cap, engine, vehicle, and manufacturing method of camshaft bearing cap

[0001] This application claims priority to Chinese Patent Application No. 202510197715.9, filed on February 21, 2025, entitled "Camshaft Bearing Cover, Engine, Vehicle and Method for Manufacturing Camshaft Bearing Cover", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of automotive technology, and in particular to a camshaft bearing cover, an engine, a vehicle, and a method for manufacturing the camshaft bearing cover. Background Technology

[0003] With the development of the automotive industry, the requirements for engine economy and power are becoming increasingly stringent, leading to harsher working environments for components and consequently, higher demands on the engine lubrication system. In existing engines, the camshaft lubrication circuit typically involves the oil entering from the main oil passage in the cylinder head, then flowing into the oil inlet passage of the camshaft bearing housing, and finally into the main oil passage of the lower bearing cover. The main oil passage then delivers lubricating oil to both the intake and exhaust camshaft bearings, thus lubricating the camshaft. However, due to the change in the direction of the oil passages, this process often requires machining to alter the direction, resulting in a complex manufacturing process for the camshaft bearing cover. Summary of the Invention

[0004] Therefore, this disclosure provides a camshaft bearing cover, an engine, a vehicle, and a method for manufacturing the camshaft bearing cover, which simplifies the manufacturing process of the camshaft bearing cover. The technical solution is as follows:

[0005] In a first aspect, a camshaft bearing cover is provided, the camshaft bearing cover comprising a lower camshaft bearing cover and an upper camshaft bearing cover;

[0006] The lower camshaft bearing cover is adapted to be installed on the cylinder head of the engine cylinder, and the upper camshaft bearing cover is installed on the lower camshaft bearing cover;

[0007] The first surface of the camshaft bearing lower cover has two spaced-apart lower mounting half-grooves, and the second surface of the camshaft bearing upper cover has two spaced-apart upper mounting half-grooves. The second surface fits against the first surface, such that the two lower mounting half-grooves each mate with one upper mounting half-groove to form two bearing mounting holes.

[0008] A bearing cover main oil passage is provided between the first surface and the second surface, and both ends of the bearing cover main oil passage are respectively connected to a bearing mounting hole;

[0009] The third surface of the camshaft bearing lower cover has a bearing cover oil inlet passage. The first end of the bearing cover oil inlet passage is connected to the main oil passage of the bearing cover, and the third surface is in contact with the cylinder head, so that the second end of the bearing cover oil inlet passage is adapted to be connected to the oil outlet of the main oil passage of the cylinder head.

[0010] In one possible implementation, the main oil passage of the bearing cap is located on the first surface.

[0011] In one possible implementation, the lower camshaft bearing cover and / or the upper camshaft bearing cover further have two arc-shaped oil passages, each extending around the bearing mounting hole on the hole wall of the bearing mounting hole, and the two arc-shaped oil passages are respectively connected to both ends of the main oil passage of the bearing cover.

[0012] In one possible implementation, the main oil passage of the bearing cover and the two arc-shaped oil passages are both located on the lower cover of the camshaft bearing.

[0013] In one possible implementation, the cross-sectional area of ​​the second end port is larger than the cross-sectional area of ​​the oil outlet, and the second end port completely covers the oil outlet.

[0014] In one possible implementation, the diameter of the main oil passage in the cylinder head is larger than the diameter of the first end.

[0015] In a second aspect, an engine is provided, the engine comprising a cylinder, an intake-side camshaft, an exhaust-side camshaft, and a camshaft bearing cap as described in any of the first aspects;

[0016] The cylinder has a cylinder head, the lower cover of the camshaft bearing is mounted on the cylinder head, the cylinder head has a main oil passage, and the oil outlet is connected to the second end;

[0017] The intake-side camshaft is mounted in one of the bearing mounting holes via a bearing;

[0018] The exhaust-side camshaft is mounted in another bearing mounting hole via a bearing.

[0019] In one possible implementation, the diameter of the first end is 6mm to 8mm, and the diameter of the main oil passage in the cylinder head is 8mm to 10mm.

[0020] Thirdly, a vehicle is provided, the vehicle comprising an engine as described in any of the second aspects.

[0021] Fourthly, a method for manufacturing a camshaft bearing cover is provided, the method being used to manufacture a camshaft bearing cover as described in any of the first aspects, and comprising:

[0022] The camshaft bearing lower cover is manufactured by casting, such that the first surface forms the main oil passage of the bearing cover, and the third surface forms the oil inlet passage of the bearing cover.

[0023] By means of mechanical processing, the portion of the lower cover of the camshaft bearing located between the oil inlet passage of the bearing cover and the main oil passage of the bearing cover is penetrated, so that the oil inlet passage of the bearing cover is connected to the main oil passage of the bearing cover through the first end.

[0024] In the scheme disclosed herein, the main oil passage of the bearing cap, which communicates with the bearing mounting hole, is located between the first surface of the lower camshaft bearing cover and the second surface of the upper camshaft bearing cover. The oil inlet passage of the bearing cap, which communicates with both the main oil passage of the bearing cap and the main oil passage of the cylinder head, is located on the third surface, allowing the oil inlet passage and the main oil passage of the bearing cap to be formed by casting. This makes the design of the oil inlet passage and the main oil passage of the bearing cap more flexible and easier to manufacture, reduces the machining steps of the lower camshaft bearing cover, and simplifies the manufacturing process of the camshaft bearing cap. Furthermore, since the oil inlet passage and the main oil passage of the bearing cap do not require sealing plugs, the engine weight is also reduced. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 is a partial front view of a camshaft bearing lower cover mounted on a cylinder head according to an embodiment of the present disclosure;

[0027] Figure 2 is a partial structural diagram of the AA cross-section of Figure 1 provided in an embodiment of this disclosure;

[0028] Figure 3 is a cross-sectional schematic diagram of an oil inlet passage for a bearing cover provided in an embodiment of this disclosure;

[0029] Figure 4 is a schematic diagram of the AA cross-sectional structure of a camshaft bearing cover provided in an embodiment of this disclosure;

[0030] Figure 5 is a schematic diagram of the AA cross-sectional structure of a camshaft bearing cover provided in an embodiment of this disclosure;

[0031] Figure 6 is a partial structural diagram of the AA cross-section of a camshaft bearing lower cover provided in an embodiment of this disclosure;

[0032] Figure 7 is a partial structural diagram of a cylinder head in cross-section AA provided in an embodiment of this disclosure.

[0033] Explanation of reference numerals in the attached drawings: 1. Lower camshaft bearing cover; 11. First surface; 111. Lower mounting half-groove; 112. Main oil passage of bearing cover; 13. Third surface; 131. Oil inlet of bearing cover; 1311. First end; 1312. Second end; 14. Arc-shaped oil passage; 15. Branch oil passage of bearing cover; 16. Mounting hole; 2. Cylinder head; 21. Main oil passage of cylinder head; 211. Oil outlet; 22. Fourth surface; 23. Tappet lubrication passage; 3. Upper camshaft bearing cover; 31. Second surface; 311. Upper mounting half-groove; 4. Bearing mounting hole. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0035] This embodiment relates to a camshaft bearing cover. Figure 1 shows a partial front view of the camshaft bearing lower cover installed on the cylinder head 2. Figure 2 shows a partial structural diagram of the AA section of Figure 1. Figure 3 shows a cross-sectional structural diagram of the bearing cover oil inlet passage 131. Figure 4 shows a cross-sectional structural diagram of the camshaft bearing cover. Figure 5 shows a cross-sectional structural diagram of the AA section of the camshaft bearing upper cover 3. Figure 6 shows a partial cross-sectional structural diagram of the AA section of the camshaft bearing lower cover 1. Figure 7 shows a partial cross-sectional structural diagram of the AA section of the cylinder head 2.

[0036] Referring to Figure 4, the camshaft bearing cover includes a lower camshaft bearing cover 1 and an upper camshaft bearing cover 3. As shown in Figure 2, the lower camshaft bearing cover 1 is adapted to be fixedly installed on the cylinder head 2 of the engine cylinder, and the upper camshaft bearing cover 3 is fixedly installed on the lower camshaft bearing cover 1.

[0037] Correspondingly, the camshaft bearing cover may also include a fixing element, and the upper camshaft bearing cover 3, the lower camshaft bearing cover 1, and the cylinder head 2 can be fixedly connected by the fixing element.

[0038] For example, the fastener can be rod-shaped. The camshaft bearing upper cover 3, camshaft bearing lower cover 1, and cylinder head 2 all have mounting holes 16, as shown in Figure 1. Each of these three mounting holes 16 can have three fasteners. Correspondingly, the fastener can also have three fasteners. The rod-shaped fastener can pass sequentially through one mounting hole 16 in the camshaft bearing upper cover 3, one mounting hole 16 in the camshaft bearing lower cover 1, and one mounting hole 16 in the cylinder head 2. Thus, the camshaft bearing upper cover 3, camshaft bearing lower cover 1, and cylinder head 2 are fixedly connected by the fasteners.

[0039] In one example, the fastener can be a bolt. The nut at the first end of the bolt abuts against the upper cover 3 of the camshaft bearing, and the second end of the bolt passes through the mounting hole 16 of the upper cover 3 of the camshaft bearing and the mounting hole 16 of the lower cover 1 of the camshaft bearing in sequence, and is screwed into the mounting hole 16 of the cylinder head 2, wherein the mounting hole 16 of the cylinder head 2 is a bolt hole.

[0040] In another example, the fastener can be a pin with a pin cap at the first end, which abuts against the upper cover 3 of the camshaft bearing, and the second end of the pin passes through the mounting hole 16 of the upper cover 3 of the camshaft bearing and the mounting hole 16 of the lower cover 1 of the camshaft bearing in sequence, and is riveted to the cylinder head 2.

[0041] In another example, the fastener can be a screw with a screw head at the first end, which abuts against the upper cover 3 of the camshaft bearing, and the second end of the screw passes through the mounting hole 16 of the upper cover 3 of the camshaft bearing and the mounting hole 16 of the lower cover 1 of the camshaft bearing in sequence, and is screwed into the mounting hole 16 of the cylinder head 2, wherein the mounting hole 16 of the cylinder head 2 is a screw hole.

[0042] Referring to Figure 4 and in conjunction with Figures 5 and 6, the first surface 11 of the camshaft bearing lower cover 1 has two spaced-apart lower mounting half-grooves 111, and the second surface 31 of the camshaft bearing upper cover 3 has two spaced-apart upper mounting half-grooves 311. The second surface 31 fits against the first surface 11, so that the two lower mounting half-grooves 111 respectively mate with one upper mounting half-groove 311 to form two bearing mounting holes 4.

[0043] Furthermore, as shown in Figure 4, there is a bearing cover main oil passage 112 between the first surface 11 and the second surface 31, and both ends of the bearing cover main oil passage 112 are respectively connected to a bearing mounting hole 4.

[0044] For example, in Figure 6, a first oil groove may be formed on the first surface 11, and the second surface 31 may be in contact with the first surface 11, so that the second surface 31 and the first oil groove are enclosed to form the main oil passage 112 of the bearing cover.

[0045] Alternatively, a second oil groove can be provided on the second surface 31, and the first surface 11 and the second surface 31 can be attached to each other, so that the first surface 11 and the second oil groove surround each other to form the main oil passage 112 of the bearing cover.

[0046] For example, a first oil groove can be formed on the first surface 11 and a second oil groove can be formed on the second surface 31. The first surface 11 and the second surface 31 are in contact with each other, and the positions of the first oil groove and the second oil groove can be adapted to each other, so that the first oil groove and the second oil groove surround each other to form the main oil passage 112 of the bearing cover.

[0047] Referring again to Figure 6, the third surface 13 of the camshaft bearing lower cover 1 has a bearing cover oil inlet passage 131. The first end 1311 of the bearing cover oil inlet passage 131 communicates with the bearing cover main oil passage 112, and the third surface 13 is in contact with the cylinder head 2, so that the second end 1312 of the bearing cover oil inlet passage 131 is adapted to communicate with the oil outlet 211 of the cylinder head main oil passage 21 of the cylinder head 2. For example, as shown in Figure 2, the third surface 13 can be in contact with the fourth surface 22 of the cylinder head 2, and the oil outlet 211 is located on the fourth surface 22. When the camshaft bearing lower cover 1 and the cylinder head 2 are assembled together, the oil outlet 211 is opposite to the second end 1312, so that the second end 1312 can communicate with the oil outlet 211.

[0048] As described above, since the main oil passage 112 of the bearing cap, which communicates with the bearing mounting hole 4, is located between the first surface 11 of the lower camshaft bearing cover 1 and the second surface 31 of the upper camshaft bearing cover 3, and the oil inlet passage 131 of the bearing cap, which communicates with the main oil passage 112 of the bearing cap and the main oil passage 21 of the cylinder head, is located on the third surface 13, the oil inlet passage 131 of the bearing cap and the main oil passage 112 of the bearing cap can be formed by casting. Therefore, the design of the oil inlet passage 131 of the bearing cap and the main oil passage 112 of the bearing cap is more flexible and easier to manufacture. The machining steps of the lower camshaft bearing cover 1 are reduced, the manufacturing process of the camshaft bearing cover is simplified, and the oil inlet passage 131 of the bearing cap and the main oil passage 112 of the bearing cap do not need to be sealed with sealing plugs, thus reducing the weight of the engine.

[0049] In one example, to facilitate communication between the main oil passage 112 of the bearing cover and the oil inlet passage 131 of the bearing cover, as shown in Figures 2 and 6, the main oil passage 112 of the bearing cover can be located on the first surface 11. For example, a first oil groove can be formed on the first surface 11, and a second surface 31 can be attached to the first surface 11, such that the second surface 31 and the first oil groove enclose each other to form the main oil passage 112 of the bearing cover.

[0050] Since both the main oil passage 112 and the oil inlet passage 131 of the bearing cover are located on the lower cover 1 of the camshaft bearing, it is convenient to make the positions of the main oil passage 112 and the oil inlet passage 131 of the bearing cover correspond. This is beneficial to directly connect the main oil passage 112 and the oil inlet passage 131 of the bearing cover when forming them.

[0051] Therefore, the main oil passage 112 of the bearing cover will not be located on the upper cover 3 of the camshaft bearing, while the oil inlet passage 131 of the bearing cover will be on the lower cover 1 of the camshaft bearing. This would prevent a situation where, after connecting the upper cover 3 of the camshaft bearing and the lower cover 1 of the camshaft bearing, the main oil passage 112 of the bearing cover and the oil inlet passage 131 of the bearing cover would be misaligned and unable to connect.

[0052] In one example, the lower camshaft bearing cover 1 and / or the upper camshaft bearing cover 3 also have two arc-shaped oil passages 14. The two arc-shaped oil passages 14 extend around the bearing mounting hole 4 on the hole wall, and are respectively connected to both ends of the main oil passage 112 of the bearing cover. For example, as shown in Figure 2, both ends of the main oil passage 112 of the bearing cover can extend into one of the arc-shaped oil passages 14, thereby achieving communication between the main oil passage 112 of the bearing cover and the arc-shaped oil passage 14.

[0053] As shown in Figure 2, for example, the two arc-shaped oil passages 14 can both be located on the lower cover 1 of the camshaft bearing, extending around the bearing mounting hole 4 on the groove wall of a lower mounting half groove 111.

[0054] However, the two arc-shaped oil passages 14 can also be located on the upper cover 3 of the camshaft bearing, extending around the bearing mounting hole 4 on the groove wall of an upper mounting half groove 311.

[0055] For example, an arc-shaped oil passage 14 may be located on the lower cover 1 of the camshaft bearing, extending around the bearing mounting hole 4 on the groove wall of a lower mounting half groove 111, and another arc-shaped oil passage 14 may be located on the upper cover 3 of the camshaft bearing, extending around the bearing mounting hole 4 on the groove wall of an upper mounting half groove 311.

[0056] For example, a single arc-shaped oil passage 14 may have two parts, one part being located on the lower cover 1 of the camshaft bearing and extending around the bearing mounting hole 4 on the groove wall of a lower mounting half groove 111, and the other part being located on the upper cover 3 of the camshaft bearing and extending around the bearing mounting hole 4 on the groove wall of an upper mounting half groove 311. The two parts of the arc-shaped oil passage 14 may be interconnected to form a complete arc-shaped oil passage 14.

[0057] As such, the lubricating oil can enter the arc-shaped oil passage 14 and flow along the arc-shaped oil passage 14, providing more thorough lubrication to the bearing in the bearing mounting hole 4.

[0058] In one example, continuing to refer to Figure 2, the bearing cover oil inlet passage 131 can be connected to the bearing cover main oil passage 112 indirectly by connecting with an arc-shaped oil passage 14. In this way, lubricating oil can enter the bearing cover oil inlet passage 131, an arc-shaped oil passage 14, the bearing cover main oil passage 112 and another arc-shaped oil passage 14 sequentially from the cylinder head main oil passage 21 through the oil outlet 211, thereby lubricating the bearing in the bearing mounting hole 4.

[0059] In another example, the bearing cover oil inlet passage 131 can also be directly connected to the bearing cover main oil passage 112. In this way, lubricating oil can enter the bearing cover oil inlet passage 131, the bearing cover main oil passage 112 and the two arc-shaped oil passages 14 sequentially from the cylinder cover main oil passage 21 through the oil outlet 211, thereby lubricating the bearing in the bearing mounting hole 4.

[0060] In one example, the main oil passage 112 of the bearing cover and the two arc-shaped oil passages 14 are both located on the lower cover 1 of the camshaft bearing.

[0061] Since the main oil passage 112, the oil inlet passage 131, and the two arc-shaped oil passages 14 of the bearing cover are all located on the lower cover 1 of the camshaft bearing, it is convenient to make the positions of the main oil passage 112, the oil inlet passage 131, and the two arc-shaped oil passages 14 correspond. This is beneficial to directly connect the main oil passage 112, the oil inlet passage 131, and the two arc-shaped oil passages 14 when forming them.

[0062] Therefore, the main oil passage 112 or the two arc-shaped oil passages 14 of the bearing cover will not be located on the upper cover 3 of the camshaft bearing, while the oil inlet passage 131 of the bearing cover is on the lower cover 1 of the camshaft bearing. This would prevent the main oil passage 112 and the two arc-shaped oil passages 14 from being misaligned with the oil inlet passage 131 of the bearing cover after the upper cover 3 of the camshaft bearing and the lower cover 1 of the camshaft bearing, thus preventing them from connecting.

[0063] Since it is impossible to guarantee that the port of the main oil passage 21 and the oil outlet 211 of the cylinder head are concentrically aligned after the installation of the lower camshaft bearing cover 1 and the cylinder head 2, in one example, the cross-sectional area of ​​the second end 1312 port is larger than the cross-sectional area of ​​the oil outlet 211, and the port of the second end 1312 completely covers the oil outlet 211. In this way, even if there is a certain degree of misalignment between the port of the main oil passage 21 and the oil outlet 211 of the cylinder head after the installation of the lower camshaft bearing cover 1 and the cylinder head 2, the connection between the main oil passages 21 and 211 can be guaranteed.

[0064] In one example, the diameter of the cylinder head main oil passage 21 is larger than the diameter of the first end 1311. This helps to ensure that the lubricating oil has sufficient pressure after entering the bearing cover oil inlet 131 from the cylinder head main oil passage 21 and flows into the bearing cover main oil passage 112, thereby enabling sufficient lubrication of the bearing in the bearing mounting hole 4.

[0065] In this embodiment, since the main oil passage 112 of the bearing cap, which communicates with the bearing mounting hole 4, is located between the first surface 11 of the lower camshaft bearing cover 1 and the second surface 31 of the upper camshaft bearing cover 3, and the oil inlet passage 131 of the bearing cap, which communicates with the main oil passage 112 of the bearing cap and the main oil passage 21 of the cylinder head, is located on the third surface 13, the oil inlet passage 131 of the bearing cap and the main oil passage 112 of the bearing cap can be formed by casting. Therefore, the design of the oil inlet passage 131 of the bearing cap and the main oil passage 112 of the bearing cap is more flexible and easier to manufacture, the machining steps of the lower camshaft bearing cover 1 are reduced, and the manufacturing process of the camshaft bearing cover is simplified. At the same time, the oil inlet passage 131 of the bearing cap and the main oil passage 112 of the bearing cap do not need to be sealed with sealing plugs, thus reducing the weight of the engine.

[0066] This embodiment also provides an engine, which includes a cylinder, an intake-side camshaft, an exhaust-side camshaft, and a camshaft bearing cover as described in the first aspect. The cylinder has a cylinder head 2, and a lower camshaft bearing cover 1 is mounted on the cylinder head 2. The cylinder head 2 has a main oil passage 21, and an oil outlet 211 communicates with a second end 1312. The intake-side camshaft is mounted in a bearing mounting hole 4 via a bearing, and the exhaust-side camshaft is mounted in another bearing mounting hole 4 via a bearing.

[0067] In one example, the diameter of the first end 1311 is 6mm to 8mm, and the diameter of the cylinder head main oil passage 21 is 8mm to 10mm, with the diameter of the first end 1311 being smaller than the diameter of the cylinder head main oil passage 21. For example, the diameter of the first end 1311 can be 6mm, and the diameter of the cylinder head main oil passage 21 can be 8mm; another example is that the diameter of the first end 1311 can be 7mm, and the diameter of the cylinder head main oil passage 21 can be 8.5mm; yet another example is that the diameter of the first end 1311 can be 8mm, and the diameter of the cylinder head main oil passage 21 can be 10mm.

[0068] In this way, the diameters of the cylinder head main oil passage 21 and the bearing cover oil inlet passage 131 are not too small, ensuring the flow of lubricating oil in the cylinder head main oil passage 21 and the bearing cover oil inlet passage 131. At the same time, the diameters of the cylinder head main oil passage 21 and the bearing cover oil inlet passage 131 are not too large, which helps to ensure that the lubricating oil has sufficient pressure after entering the bearing cover oil inlet passage 131 from the cylinder head main oil passage 21 and flows into the bearing cover main oil passage 112, thereby providing sufficient lubrication to the bearing in the bearing mounting hole 4.

[0069] In one example, referring to Figure 2 and in conjunction with Figures 6 and 7, the cylinder head 2 may also have multiple tappet lubrication passages 23, and the camshaft bearing lower cover 1 may also have multiple bearing cover branch oil passages 15. Each of the multiple bearing cover branch oil passages 15 can communicate with the main bearing cover oil passage 112. Each bearing cover branch oil passage 15 corresponds one-to-one with a tappet lubrication passage 23, and the corresponding bearing cover branch oil passages 15 and tappet lubrication passages 23 are interconnected.

[0070] For example, as shown in Figure 6, one end of the bearing cover oil passage 15 can extend to the third surface 13, and the other end can extend into the bearing cover main oil passage 112. As shown in Figure 7, one end of the tappet lubrication passage 23 can extend to the fourth surface 22, and the other end can extend to the journal or tappet of the intake-side camshaft or exhaust-side camshaft. Thus, lubricating oil can enter each bearing cover oil passage 15 from the bearing cover main oil passage 112 and flow into the tappet lubrication passage 23 to lubricate the journal or tappet of the intake-side camshaft or exhaust-side camshaft.

[0071] In this embodiment, since the main oil passage 112 of the bearing cap, which communicates with the bearing mounting hole 4, is located between the first surface 11 of the lower camshaft bearing cover 1 and the second surface 31 of the upper camshaft bearing cover 3, and the oil inlet passage 131 of the bearing cap, which communicates with the main oil passage 112 of the bearing cap and the main oil passage 21 of the cylinder head, is located on the third surface 13, the oil inlet passage 131 of the bearing cap and the main oil passage 112 of the bearing cap can be formed by casting. Therefore, the design of the oil inlet passage 131 of the bearing cap and the main oil passage 112 of the bearing cap is more flexible and easier to manufacture, the machining steps of the lower camshaft bearing cover 1 are reduced, and the manufacturing process of the camshaft bearing cover is simplified. At the same time, the oil inlet passage 131 of the bearing cap and the main oil passage 112 of the bearing cap do not need to be sealed with sealing plugs, thus reducing the weight of the engine.

[0072] This embodiment also provides a vehicle that includes an engine as described in any of the second aspects.

[0073] In this embodiment, since the main oil passage 112 of the bearing cap, which communicates with the bearing mounting hole 4, is located between the first surface 11 of the lower camshaft bearing cover 1 and the second surface 31 of the upper camshaft bearing cover 3, and the oil inlet passage 131 of the bearing cap, which communicates with the main oil passage 112 of the bearing cap and the main oil passage 21 of the cylinder head, is located on the third surface 13, the oil inlet passage 131 of the bearing cap and the main oil passage 112 of the bearing cap can be formed by casting. Therefore, the design of the oil inlet passage 131 of the bearing cap and the main oil passage 112 of the bearing cap is more flexible and easier to manufacture, the machining steps of the lower camshaft bearing cover 1 are reduced, and the manufacturing process of the camshaft bearing cover is simplified. At the same time, the oil inlet passage 131 of the bearing cap and the main oil passage 112 of the bearing cap do not need to be sealed with sealing plugs, thus reducing the weight of the engine.

[0074] This embodiment also provides a method for manufacturing a camshaft bearing cover. The method is used to manufacture a camshaft bearing cover as described in any of the first aspects, and includes:

[0075] The camshaft bearing lower cover 1 is manufactured by casting, such that the first surface 11 forms the bearing cover main oil passage 112, and the third surface 13 forms the bearing cover oil inlet passage 131.

[0076] By means of machining, for example by drilling, the portion of the camshaft bearing lower cover 1 located between the bearing cover oil inlet passage 131 and the bearing cover main oil passage 112 can be penetrated, so that the bearing cover oil inlet passage 131 is connected to the bearing cover main oil passage 112 through the first end.

[0077] In this embodiment, the bearing cover oil inlet passage 131 and the bearing cover main oil passage 112 of the camshaft bearing lower cover 1 are formed by casting. This makes the design of the bearing cover oil inlet passage 131 and the bearing cover main oil passage 112 more flexible and easier to manufacture, thus reducing the number of machining steps for the camshaft bearing lower cover 1 and simplifying the manufacturing process of the camshaft bearing cover. Furthermore, the manufactured camshaft bearing cover oil inlet passage 131 and bearing cover main oil passage 112 do not require sealing plugs, thus reducing the weight of the engine.

[0078] It should be noted that the terms "first," "second," etc., used in the specification and claims of this disclosure are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this disclosure can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class, and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0079] The above are merely preferred embodiments of this disclosure and are not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A camshaft bearing cover, wherein, The camshaft bearing cover includes a lower camshaft bearing cover (1) and an upper camshaft bearing cover (3); The lower camshaft bearing cover (1) is adapted to be installed on the cylinder head (2) of the engine cylinder, and the upper camshaft bearing cover (3) is installed on the lower camshaft bearing cover (1); The first surface (11) of the camshaft bearing lower cover (1) has two spaced-apart lower mounting half-grooves (111), and the second surface (31) of the camshaft bearing upper cover (3) has two spaced-apart upper mounting half-grooves (311). The second surface (31) fits against the first surface (11), so that the two lower mounting half-grooves (111) respectively cooperate with one upper mounting half-groove (311) to form two bearing mounting holes (4). There is a bearing cover main oil passage (112) between the first surface (11) and the second surface (31). The two ends of the bearing cover main oil passage (112) are respectively connected to a bearing mounting hole (4). The bearing cover main oil passage (112) is located on the first surface (11). The third surface (13) of the camshaft bearing lower cover (1) has a bearing cover oil inlet passage (131), the first end (1311) of the bearing cover oil inlet passage (131) is connected to the bearing cover main oil passage (112), and the third surface (13) is in contact with the cylinder head (2), so that the second end (1312) of the bearing cover oil inlet passage (131) is adapted to be connected to the oil outlet (211) of the cylinder head main oil passage (21) of the cylinder head (2).

2. The camshaft bearing cover according to claim 1, wherein, The lower cover (1) and / or upper cover (3) of the camshaft bearing also have two arc-shaped oil passages (14), which extend around the bearing mounting hole (4) on the hole wall of the bearing mounting hole (4) respectively, and the two arc-shaped oil passages (14) are respectively connected to both ends of the main oil passage (112) of the bearing cover.

3. The camshaft bearing cover according to claim 2, wherein, The main oil passage (112) of the bearing cover and the two arc-shaped oil passages (14) are both located on the lower cover (1) of the camshaft bearing.

4. The camshaft bearing cover according to claim 1, wherein, The cross-sectional area of ​​the second end (1312) port is larger than the cross-sectional area of ​​the oil outlet (211), and the second end (1312) port completely covers the oil outlet (211).

5. The camshaft bearing cover according to claim 4, wherein, The diameter of the main oil passage (21) in the cylinder head is larger than the diameter of the first end (1311).

6. An engine, wherein, The engine includes a cylinder, an intake-side camshaft, an exhaust-side camshaft, and a camshaft bearing cap as described in any one of claims 1 to 5; The cylinder has a cylinder head (2), the lower cover (1) of the camshaft bearing is mounted on the cylinder head (2), the cylinder head (2) has a cylinder head main oil passage (21), and the oil outlet (211) is connected to the second end (1312); The intake-side camshaft is mounted in one of the bearing mounting holes (4) via a bearing; The exhaust-side camshaft is mounted in another bearing mounting hole (4) via a bearing.

7. The engine according to claim 6, wherein, The diameter of the first end (1311) is 6mm to 8mm, and the diameter of the main oil passage (21) of the cylinder head is 8mm to 10mm.

8. A vehicle, wherein, The vehicle includes the engine as described in any one of claims 6 to 7.

9. A method for manufacturing a camshaft bearing cover, wherein, The method for manufacturing the camshaft bearing cap is used to manufacture the camshaft bearing cap as described in any one of claims 1 to 5, and includes: The camshaft bearing lower cover (1) is manufactured by casting such that the first surface (11) forms the main oil passage (112) of the bearing cover, and the third surface (13) forms the oil inlet passage (131) of the bearing cover. By means of machining, the portion of the camshaft bearing lower cover (1) located between the bearing cover oil inlet passage (131) and the bearing cover main oil passage (112) is penetrated, so that the bearing cover oil inlet passage (131) is connected to the bearing cover main oil passage (112) through the first end.

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