Cylinder cover lubricating system and engine

Abstract

The invention relates to the technical field of engines, and provides a cylinder cover lubricating system and an engine, one end of a first supply unit communicates with a cylinder body oil duct, and the other end of the first supply unit communicates with an air inlet side lubricating part and an exhaust side lubricating part so as to supply lubricating oil to the air inlet side lubricating part and the exhaust side lubricating part; one end of the second supply unit is communicated with the cylinder body oil duct, and the other end of the second supply unit is communicated with an air inlet side cam bearing hole and an air outlet side cam bearing hole which are located at the foremost end of the cylinder cover. Therefore, on the premise that lubricating oil is supplied to the air inlet side lubricating part and the exhaust side lubricating part, the lubricating oil supply can be intensified in a targeted mode for the front end timing exhaust bearing hole and the front end timing exhaust bearing hole area which are large in stress, so that a friction pair large in stress can rapidly form an oil film at the initial stage of starting of an engine, and the lubricating oil supply efficiency is improved. Abrasion is reduced, the working reliability and stability of an engine are improved, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engines, in particular to a cylinder head lubrication system and an engine. BACKGROUND

[0002] In the related art, when the engine stops working, the lubricating oil on each friction pair in the engine will flow back to the oil pan. When the engine starts, whether a mechanical oil pump or an electronic oil pump is used, the pumped lubricating oil needs a certain time to move to each friction pair and form an oil film, resulting in hard friction without lubrication protection for the friction pair at the initial stage of engine start, and even causing the camshaft or crankshaft to be clamped. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a cylinder head lubrication system that can form an oil film more timely to reduce friction pair wear, especially to reduce the friction pair that is under greater stress at the initial stage of engine start, and can quickly form an oil film to improve the working reliability and stability of the engine, reduce wear, and prolong the service life.

[0004] The present application also provides an engine with the above-mentioned cylinder head lubrication system.

[0005] In a first aspect, the present application provides a cylinder head lubrication system, comprising: an intake side lubrication part, an exhaust side lubrication part, a first supply unit, and a second supply unit, the intake side lubrication part and the exhaust side lubrication part are both multiple, the intake side lubrication part is an intake side cam bearing hole and an intake valve tappet mounting hole, and the exhaust side lubrication part is an exhaust side cam bearing hole and an exhaust valve tappet mounting hole; one end of the first supply unit is in communication with a cylinder body oil gallery, and the other end is in communication with the intake side lubrication part and the exhaust side lubrication part to supply lubricating oil to the intake side lubrication part and the exhaust side lubrication part; one end of the second supply unit is in communication with the cylinder body oil gallery, and the other end is in communication with one of the intake side cam bearing holes and one of the exhaust side cam bearing holes located at the most front end of the cylinder head; wherein The first supply unit and the second supply unit introduce lubricating oil from both ends of the length of the cylinder head.

[0006] According to the cylinder head lubrication system of the present application, by providing the first supply unit and the second supply unit, the lubricating oil supply to the intake side lubrication part and the exhaust side lubrication part can be realized, and the lubricating oil supply to the front end timing exhaust bearing hole and the front end timing exhaust bearing hole area that are under greater stress can be strengthened, so that the friction pair under greater stress at the initial stage of engine start can quickly form an oil film to reduce wear, improve the working reliability and stability of the engine, and prolong the service life.

[0007] According to some embodiments of the present application, the first supply unit comprises: a first upper oil passage, a first branch oil passage, an intake side branch oil passage and an exhaust side branch oil passage, an intake side supply oil passage, an exhaust side supply oil passage, one end of the first upper oil passage is communicated with the cylinder block oil passage, the other end is communicated with the first branch oil passage, the first branch oil passage is communicated with the intake side branch oil passage and the exhaust side branch oil passage, the exhaust side branch oil passage is communicated with the exhaust side supply oil passage and the exhaust valve tappet mounting hole, the intake side branch oil passage is communicated with the intake side supply oil passage and the intake valve tappet mounting hole, the intake side supply oil passage is communicated with the intake side cam bearing hole, and the exhaust side supply oil passage is communicated with the exhaust side cam bearing hole; the second supply unit comprises: a second upper oil passage, a second branch oil passage, and a timing intake upper oil passage and a timing exhaust upper oil passage, one end of the second upper oil passage is communicated with the cylinder block oil passage, the other end is communicated with the second branch oil passage, the second branch oil passage is communicated with the timing intake upper oil passage and the timing exhaust upper oil passage, the timing exhaust upper oil passage is communicated with the front end timing exhaust bearing hole located at the most front end of the cylinder head, and the timing intake upper oil passage is communicated with the front end timing intake bearing hole located at the most front end of the cylinder head.

[0008] According to some embodiments of the present application, in the length direction of the cylinder head, the timing intake upper oil passage is arranged at the rear end of the front end timing intake bearing hole, and the corresponding intake side supply oil passage is located at the front end of the front end timing intake bearing hole; and the timing exhaust upper oil passage is arranged at the rear end of the front end timing exhaust bearing hole, and the corresponding exhaust side supply oil passage is located at the front end of the front end timing exhaust bearing hole.

[0009] According to some embodiments of the present application, the cylinder head lubrication system further comprises: a high-pressure oil pump lubrication part, the high-pressure oil pump lubrication part comprises: an oil pump supply oil passage, a ring oil passage, a vertical oil passage, and a horizontal oil passage, one end of the oil pump supply oil passage is communicated with the first supply unit, the other end of the oil pump supply oil passage is communicated with the ring oil passage, the ring oil passage, the vertical oil passage, and the horizontal oil passage are sequentially communicated, and the horizontal oil passage is communicated with the oil pump tappet mounting hole to lubricate the high-pressure oil pump.

[0010] According to some embodiments of the present application, the ring oil passage is arranged around one intake side cam bearing hole, and the oil pump supply oil passage is located at the side of the intake side cam bearing hole, and the intake side cam bearing hole is located at the last end of the cylinder head.

[0011] According to some embodiments of the present application, in the height direction of the cylinder head, the intake side branch oil passage is located above the exhaust side branch oil passage.

[0012] According to some embodiments of the present application, an included angle a1 between an axis of the first oil supply channel and an axis of the first branch oil channel is 90-150°.

[0013] According to some embodiments of the present application, the cylinder head supply system further comprises a pre-supply unit, the pre-supply unit comprising a plurality of intake-side oil grooves and a plurality of exhaust-side oil grooves, the intake-side oil grooves being arranged corresponding to the intake-side cam bearing holes, the exhaust-side oil grooves being arranged corresponding to the exhaust-side cam bearing holes, the pre-supply unit being spaced apart from the first supply unit and adapted to store lubricating oil.

[0014] In a second aspect, the present application provides an engine, comprising: a cylinder head and a cylinder block, the cylinder head having the cylinder head lubrication system in the above embodiments, the cylinder block having a cylinder block lubrication system, the cylinder block lubrication system comprising: a cylinder block front end oil supply channel and a cylinder block rear end oil supply channel, the cylinder block front end oil supply channel being in communication with the second supply unit, the cylinder block rear end oil supply channel being in communication with the first supply unit.

[0015] According to some embodiments of the present application, a one-way valve or a stop valve is arranged in the first oil supply channel of the first supply unit, the second oil supply channel of the second supply unit, or the cylinder block front end oil supply channel and the cylinder block rear end oil supply channel.

[0016] Additional aspects and advantages of the present application will be made apparent from the following description of embodiments, which proceeds with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description of embodiments, taken in conjunction with the accompanying drawings. Figure 1 is a schematic view of an engine according to embodiments of the present application; Figure 2 is a schematic view of an engine lubrication system, an intake camshaft, and an exhaust camshaft according to embodiments of the present application; Figure 3 is a schematic view of a cylinder head lubrication system according to embodiments of the present application; Figure 4 is a schematic view of a cylinder head lubrication system according to embodiments of the present application; Figure 5 is a schematic view of a cylinder head according to embodiments of the present application; Figure 6 is a schematic view of a cylinder block according to embodiments of the present application; Figure 5 is a cross-sectional view along the center line A-A; Figure 7 is a schematic view of a high-pressure oil pump and a cylinder head according to embodiments of the present application.

[0018] Reference signs: Engine 1000, Cylinder head lubrication system 100, cylinder block lubrication system 200, cylinder head 300, intake camshaft 400, exhaust camshaft 500, high-pressure oil pump 600, engine lubrication system 700, Intake side lubrication portion 110, intake side cam bearing hole 111, front end timing intake bearing hole 1111, intake valve lifter mounting hole 112, Exhaust side lubrication portion 120, exhaust side cam bearing hole 121, front end timing exhaust bearing hole 1211, exhaust valve lifter mounting hole 122, First supply unit 130, first upper oil passage 131, first branch oil passage 132, intake side oil distribution passage 133, exhaust side oil distribution passage 134, intake side supply oil passage 135, exhaust side supply oil passage 136, Second supply unit 140, second upper oil passage 141, second branch oil passage 142, timing intake upper oil passage 143, timing exhaust upper oil passage 144, branch oil passage 145, Pre-supply unit 150, intake side oil groove 151, exhaust side oil groove 152, High-pressure oil pump lubrication portion 160, oil pump supply oil passage 161, ring oil passage 162, vertical oil passage 163, horizontal oil passage 164, oil pump lifter mounting hole 165, Cylinder block front end upper oil passage 210, cylinder block rear end upper oil passage 220, Camshaft thrust journal 01, high-pressure oil pump drive cam 02, Fourth circumferential hole segment a, third circumferential hole segment b, second circumferential hole segment c, first circumferential hole segment d, Angle a1 between the axis of the first upper oil passage and the axis of the first branch oil passage. DETAILED DESCRIPTION

[0019] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, all terms used in disclosing the application, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms used in the description of the disclosed subject matter should not be interpreted as identifying key

[0021] Reference throughout this application to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same embodiment, nor are they necessarily all mutually exclusive or alternative embodiments.

[0022] In the description of the application, it is necessary to note that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "attaching" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0023] The term "and / or" in this application is only a description of the association relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B, which can represent the existence of A alone, the existence of A and B together, and the existence of B alone. In addition, the character " / " in this application generally represents that the front and rear associated objects have an "or" relationship.

[0024] In the embodiments of the application, the same reference signs represent the same parts, and for the sake of brevity, the detailed description of the same parts is omitted in different embodiments. It should be understood that the thickness, length and width of various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length and width of the integrated device, are only exemplary and should not constitute any limitation on the application.

[0025] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0026] In the description of the present application, the first feature "above" or "below" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them.

[0027] In the description of the present application, the first feature "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in height than the second feature.

[0028] "Multiple" appearing in the present application refers to two or more (including two).

[0029] In the related art, when the engine stops working, the lubricating oil on each friction pair inside the engine will flow back to the oil pan, and when the engine starts, whether a mechanical oil pump or an electronic oil pump is used, the pumped lubricating oil needs a certain time to move to each friction pair and form an oil film, resulting in hard friction without lubrication protection for the friction pair at the initial stage of engine start, and even causing the camshaft or crankshaft to be seized.

[0030] Based on this, the present application proposes a cylinder head lubrication system which can quickly form an oil film between friction pairs to reduce wear and prolong service life.

[0031] First, referring to the drawings, the structure of the engine 1000 of the embodiment of the present application is described in detail.

[0032] As shown in Figure 1 , Figure 2 and Figure 3 , the engine 1000 comprises a cylinder block (not shown in the figure) and a cylinder head 300, the cylinder block is provided with a cylinder block lubrication system 200, the cylinder head 300 is provided with a cylinder head lubrication system 100, and the cylinder block lubrication system 200 supplies lubricating oil to the cylinder head lubrication system 100 through a cylinder block front end oil supply channel 210 and a cylinder block rear end oil supply channel 220.

[0033] The cylinder head lubrication system 100 comprises: an intake side lubrication part 110, an exhaust side lubrication part 120, a first supply unit 130, a second supply unit 140, a pre-supply unit 150, and a high-pressure oil pump lubrication part 160.

[0034] The intake side lubrication part 110 comprises a plurality of intake side cam bearing holes 111 and a plurality of intake valve tappet mounting holes 112, the exhaust side lubrication part 120 comprises a plurality of exhaust side cam bearing holes 121 and a plurality of exhaust valve tappet mounting holes 122, one of the plurality of intake side cam bearing holes 111 located at the most front end is defined as a front-end timing intake bearing hole 1111, one of the plurality of exhaust side cam bearing holes 121 located at the most front end is defined as a front-end timing exhaust bearing hole 1211, and the first supply unit 130 and the second supply unit 140 are respectively communicated with a cylinder block front-end oil gallery 210 and a cylinder block rear-end oil gallery 220, the first supply unit 130 is communicated with the intake side lubrication part 110, the exhaust side lubrication part 120, and the high-pressure oil pump lubrication part 160 to supply lubricating oil to the three parts respectively, and the second supply unit 140 is communicated with the front-end timing intake bearing hole 1111 and the front-end timing exhaust bearing hole 1211 to realize targeted lubricating oil supply to the bearing holes that are subjected to greater stress at the initial engine 1000 start.

[0035] It should be noted that the high-pressure oil pump lubrication part 160 is arranged above the intake side cam bearing hole 111 located at the rear end of the cylinder head 300, and is arranged adjacent to the entry end of the first supply unit 130, so that the high-pressure oil pump lubrication part 160 can also be lubricated preferentially.

[0036] It can be understood that the engine 1000 of the embodiment of the application is applied to a traditional fuel vehicle, can form an oil film more quickly to reduce the wear of the engine 1000 and prolong the service life, and is especially suitable for an oil-electric hybrid vehicle scenario.

[0037] Specifically, for an oil-electric hybrid vehicle (such as a plug-in hybrid vehicle and a range-extending hybrid vehicle), the engine 1000 needs to be started when there is a charging demand or the pure-electric cruising range is insufficient, and therefore the engine 1000 is in a non-running state for a long time, and the lubricating oil of each friction pair inside the engine 1000 flows back to the oil pan. When the engine 1000 is started, the oil-electric hybrid vehicle has a strong power demand or power demand, and the engine 1000 is pulled up to a medium-high speed and load within a few seconds.

[0038] However, no matter mechanical oil pump or electronic oil pump is adopted, a certain flow time is needed for the lubricating oil pumped out from the oil pump to reach each friction pair, leading to unavoidable friction of the friction pair without lubricating oil at the initial start of the engine 1000. The longer the start interval of the engine 1000 is, the greater the influence of the friction of the friction pair without lubricating oil at the re-start is, and the extreme state of dry friction exists, leading to shaft holding of the camshaft or the crankshaft. The conventional short-time friction of the friction pair without lubricating oil has less influence on the friction pair, but has greater influence on the friction pair under initial start, such as the front end timing intake bearing hole 1111, the front end timing exhaust bearing hole 1211 of the VVT (variable valve timing) or timing sprocket installed at the front end of the cylinder head 300, and the intake side cam bearing hole 111 of the cylinder head 300 at the rear end supporting the high-pressure oil pump drive cam 02.

[0039] Among them, the front end timing intake bearing hole 1111 and the front end timing exhaust bearing hole 1211 need to bear the timing chain force of the timing system in operation, and the intake side cam bearing hole 111 mainly bears the reaction force of the normal operation of the high-pressure oil pump 600, so the surface quality of the above three cam bearing holes is obviously worse than that of other cam bearing holes, and the present application can realize the preferential lubrication of the cam bearing holes in the setting area of the high-pressure oil pump 600 through the first supply unit 130 cooperating with the high-pressure oil pump lubricating part 160, and realize the targeted lubrication of the front end timing intake bearing hole 1111 and the front end timing exhaust bearing hole 1211 through the second supply unit 140, so as to delay the wear of the three, and improve the service life of the engine 1000.

[0040] Further, the present application also provides the pre-supply unit 150, which is spaced apart from the first supply unit 130, the second supply unit 140 and the like, so as to store a certain amount of lubricating oil without backflowing into the oil pan, facilitate the rapid formation of oil film at the initial start of the engine 1000, and further reduce the friction loss.

[0041] In summary, the engine lubrication system 700 (defined by the cylinder body lubrication system 200 and the cylinder head lubrication system 100) of the embodiment of the present application is particularly suitable for the use scenario that the engine 1000 is not started for a long time and needs to be instantaneously increased to medium-high speed and load after starting, can avoid abnormal wear or even shaft holding of the friction pair due to insufficient lubrication or no lubricating oil of the friction pair, can form a local oil film between the friction pairs by the pre-supply unit 150 before the engine 1000 is started, form a complete oil film after the camshaft (intake camshaft and exhaust camshaft) rotates, can quickly supply lubricating oil to the friction pair with large initial starting stress when the engine 1000 is started, quickly form an oil film between the friction pairs before the working oil pressure of the lubricating oil is stable, thereby reducing the friction between the friction pairs, reducing the wear between the camshaft and the cam bearing hole, reducing the abnormal wear between the friction pairs, improving the operation reliability of the engine 1000, and effectively improving the operation reliability of the vehicle.

[0042] Reference will be made to Figures 1-7 The cylinder head lubrication system 100 and the engine 1000 according to the embodiment of the present application are described below.

[0043] As Figure 3 shown, the present application provides a cylinder head lubrication system 100, comprising: an intake side lubrication part 110, an exhaust side lubrication part 120, a first supply unit 130, and a second supply unit 140.

[0044] The intake side lubrication part 110 and the exhaust side lubrication part 120 are both multiple, the intake side lubrication part 110 is an intake side cam bearing hole 111 and an intake valve tappet mounting hole 112, and the exhaust side lubrication part 120 is an exhaust side cam bearing hole 121 and an exhaust valve tappet mounting hole 122, that is, the intake camshaft is provided with multiple intake cams, each intake cam corresponds to an intake valve tappet, the exhaust camshaft is provided with multiple exhaust cams, each exhaust cam corresponds to an exhaust valve tappet, the exhaust valve tappet is mounted in the exhaust valve tappet mounting hole 122, the intake valve tappet is mounted in the intake valve tappet mounting hole 112, and the intake valve tappet, the exhaust valve tappet, the intake camshaft 400, and the exhaust camshaft 500 all move relative to the cylinder head 300, so they need to be lubricated, and the intake side lubrication part 110 and the exhaust side lubrication part 120 are formed accordingly.

[0045] Exemplarily, the intake side cam bearing hole 111 includes a front end timing intake bearing hole 1111 configured to connect a timing structure and a plurality of intake side cam bearing holes 111 located behind the front end timing intake bearing hole 1111, and a high-pressure oil pump 600 can be arranged above the last end intake side cam bearing hole 111. The exhaust side cam bearing hole 121 includes a front end timing exhaust bearing hole 1211 configured to connect a timing structure and a plurality of exhaust side cam bearing holes 121 located behind the front end timing exhaust bearing hole 1211. For example, if the engine 1000 is a four-cylinder engine, there is one front end timing exhaust bearing hole 1211, one front end timing intake bearing hole 1111, four exhaust side cam bearing holes 121, and four intake side cam bearing holes 111.

[0046] One end of the first supply unit 130 is in communication with the cylinder oil gallery (the upper oil gallery at the rear end of the cylinder 220), and the other end is in communication with the intake side lubricating portion 110 and the exhaust side lubricating portion 120 to supply lubricating oil to the intake side lubricating portion 110 and the exhaust side lubricating portion 120. One end of the second supply unit 140 is in communication with the cylinder oil gallery (the upper oil gallery at the front end of the cylinder 210), and the other end is in communication with one intake side cam bearing hole 111 (the front end timing intake bearing hole 1111) and one exhaust side cam bearing hole 121 (the front end timing exhaust bearing hole 1211) located at the front end of the cylinder head 300. The first supply unit 130 and the second supply unit 140 introduce lubricating oil from both ends of the length of the cylinder head 300.

[0047] Specifically, when the engine 1000 is started, the first supply unit 130 can supply pressurized lubricating oil to the intake side cam bearing hole 111 (including the front end timing intake bearing hole 1111), the intake valve tappet mounting hole 112, the exhaust side cam bearing hole 121 (including the front end timing exhaust bearing hole 1211), and the exhaust valve tappet mounting hole 122 to lubricate the intake side camshaft, the exhaust side camshaft, the intake valve tappet, and the exhaust valve tappet.

[0048] The second supply unit 140 quickly supplies lubricating oil to the front end timing exhaust bearing hole 1211 and the front end timing intake bearing hole 1111, which are initially subjected to greater stress, to lubricate the intake side camshaft and the camshaft thrust journal 01 and the exhaust side camshaft and the camshaft thrust journal 01, and cooperate with the first supply unit 130 to supply lubricating oil to the front end timing intake bearing hole 1111 and the front end timing exhaust bearing hole 1211, to ensure that the front end timing intake bearing hole 1111 and the front end timing exhaust bearing hole 1211 each have two lubricating oil supply paths to supply lubricating oil. Before the working oil pressure of the lubricating oil is stable, an oil film is quickly formed in the area of the camshaft thrust journal 01, which is subjected to greater stress, thereby reducing the friction between the friction pairs subjected to greater stress and reducing the wear between the camshaft and the bearing hole.

[0049] It should be noted that the first supply unit 130 supplies lubricating oil from the rear end of the cylinder head 300, and the second supply unit 140 supplies lubricating oil from the front end of the cylinder head 300. The second supply unit 140 is closer to the front end timing exhaust bearing hole 1211 and the front end timing exhaust bearing hole 1211, and can supply lubricating oil to the front end timing exhaust bearing hole 1211 and the front end timing exhaust bearing hole 1211 more quickly.

[0050] According to the cylinder head lubrication system 100 of the embodiment of the application, by providing the first supply unit 130 and the second supply unit 140, the lubricating oil supply to the intake side lubrication part 110 and the exhaust side lubrication part 120 can be realized, and the lubricating oil supply to the front end timing exhaust bearing hole 1211 and the front end timing exhaust bearing hole 1211 area with greater stress can be strengthened, so that the friction pair with greater stress in the initial stage of starting the engine 1000 can quickly form an oil film, thereby reducing wear, improving the working reliability and stability of the engine 1000, and prolonging the service life.

[0051] As shown in FIGS. 1 to 4, the first supply unit 130 includes a first upper oil passage 131, a first branch oil passage 132, an intake side oil passage 133 and an exhaust side oil passage 134, an intake side supply oil passage 135, and an exhaust side supply oil passage 136. One end of the first upper oil passage 131 is in communication with the cylinder block oil passage, and the other end is in communication with the first branch oil passage 132. The first branch oil passage 132 is in communication with the intake side oil passage 133 and the exhaust side oil passage 134. The exhaust side oil passage 134 is in communication with the exhaust side supply oil passage 136 and the exhaust valve tappet mounting hole 122. The intake side oil passage 133 is in communication with the intake side supply oil passage 135 and the intake valve tappet mounting hole 112. The intake side supply oil passage 135 is in communication with the intake side cam bearing hole 111. The exhaust side supply oil passage 136 is in communication with the exhaust side cam bearing hole 121. Figure 2 Figure 3 Specifically, the first supply unit 130 has two lubricating oil supply paths. Path one is: the first upper oil passage 131→the first branch oil passage 132→the intake side oil passage 133→the intake valve tappet mounting hole 112 and the intake side supply oil passage 135→the intake side cam bearing hole 111. Path two is: the first upper oil passage 131→the first branch oil passage 132→the exhaust side oil passage 134→the exhaust valve tappet mounting hole 122 and the exhaust side supply oil passage 136→the exhaust side cam bearing hole 121.

[0052] Specifically, the first supply unit 130 has two lubricating oil supply paths. Path one is: the first upper oil passage 131→the first branch oil passage 132→the intake side oil passage 133→the intake valve tappet mounting hole 112 and the intake side supply oil passage 135→the intake side cam bearing hole 111. Path two is: the first upper oil passage 131→the first branch oil passage 132→the exhaust side oil passage 134→the exhaust valve tappet mounting hole 122 and the exhaust side supply oil passage 136→the exhaust side cam bearing hole 121.

[0053] ​The second supply unit 140 includes a second upper oil passage 141, a second branch oil passage 142, and a timing intake upper oil passage 143 and a timing exhaust upper oil passage 144, one end of the second upper oil passage 141 is communicated with the cylinder block oil passage, the other end is communicated with the second branch oil passage 142, the second branch oil passage 142 is communicated with the timing intake upper oil passage 143 and the timing exhaust upper oil passage 144, the timing exhaust upper oil passage 144 is communicated with the front end timing exhaust bearing hole 1211 located at the most front end of the cylinder head 300, and the timing intake upper oil passage 143 is communicated with the front end timing intake bearing hole 1111 located at the most front end of the cylinder head 300.

[0054] Specifically, the second supply unit 140 has two lubricating oil supply paths, path three is: the second upper oil passage 141→the second branch oil passage 142→the timing intake upper oil passage 143→the front end timing intake bearing hole 1111; and path four is: the second upper oil passage 141→the second branch oil passage 142→the timing exhaust upper oil passage 144→the front end timing exhaust bearing hole 1211.

[0055] Therefore, through the four lubricating oil supply paths, not only the lubrication of the intake camshaft 400, the exhaust camshaft 500, the intake valve tappet, and the exhaust valve tappet can be realized, but also the front end timing intake bearing hole 1111 and the front end timing exhaust bearing hole 1211 are communicated with two lubricating oil supply paths, so as to realize rapid supply of lubricating oil, ensure that the amount of lubricating oil meets the lubrication demand, enhance lubrication for the high load area, effectively reduce wear, and prolong the service life of the engine 1000.

[0056] It should be noted that the second branch oil passage 142 and the timing intake upper oil passage 143 and the timing exhaust upper oil passage 144 can be communicated through the branch oil passage 145.

[0057] In combination Figure 3 As shown, according to some embodiments of the present application, in the length direction of the cylinder head 300, the timing intake upper oil passage 143 is arranged at the rear end of the front end timing intake bearing hole 1111, and the corresponding intake side supply oil passage 135 is located at the front end of the front end timing intake bearing hole 1111; and the timing exhaust upper oil passage 144 is arranged at the rear end of the front end timing exhaust bearing hole 1211, and the corresponding exhaust side supply oil passage 136 is located at the front end of the front end timing exhaust bearing hole 1211.

[0058] It should be noted that in combination Figure 7As shown, the rear end journal of the camshaft drives the valve rocker arm assembly at the rear end of the cylinder head 300, and the front end thrust journal 01 of the camshaft drives the variable valve timing (VVT) and timing chain system to operate, the force acting on the camshaft by the timing chain system is much larger than the force acting on the camshaft by the valve rocker arm assembly, which causes the clearance between the rear thrust surface of the front end timing intake bearing hole 1111 and the rear thrust surface of the front end timing exhaust bearing hole 1211 and the rear thrust surface of the front end timing exhaust bearing hole 1211 of the camshaft thrust journal 01 to be small, and the force acting on the rear thrust surface is larger than the force acting on the front thrust surface during the initial rotation of the engine 1000.

[0059] Based on this, the timing intake oil supply passage 143 and the timing exhaust oil supply passage 144 are arranged at the rear end of the front end timing intake bearing hole 1111 and the front end timing exhaust bearing hole 1211, respectively, close to the rear thrust surface of the camshaft thrust journal 01, and the intake side oil supply passage 135 and the exhaust side oil supply passage 136 are arranged at the front end of the front end timing intake bearing hole 1111 and the front end timing exhaust bearing hole 1211, respectively, close to the front thrust surface of the camshaft thrust journal 01, and the flow path length of the cylinder head front end oil supply passage 210 to the front end timing intake bearing hole 1111 (i.e. path three) and the flow path length of the cylinder head front end oil supply passage 210 to the front end timing exhaust bearing hole 1211 (i.e. path four) are shorter than the flow path length of path one to the front end timing intake bearing hole 1111 and the flow path length of path two to the front end timing exhaust bearing hole 1211, so that the lubricating oil of path three and path four can reach the rear thrust surface of the camshaft thrust journal 01 more quickly, so that during the start of the engine 1000, the lubricating oil is quickly supplied to the rear thrust surface of the camshaft thrust journal 01 which is under greater initial starting stress, and before the working oil pressure of the lubricating oil stabilizes, an oil film is quickly formed on the rear thrust surface of the camshaft thrust journal 01 which is under greater stress, thereby reducing the friction between the stress greater friction pairs and reducing the wear caused by the initial poor lubrication between the friction pairs.

[0060] As shown in Figure 4 , Figure 5 and Figure 6 According to some embodiments of the present application, in the height direction of the cylinder head 300, the intake side oil distribution passage 133 is located above the exhaust side oil distribution passage 134.

[0061] Therefore, the intake side oil distribution passage 133 corresponding to the intake side where the high-pressure oil pump 600 is arranged is higher than the exhaust side oil distribution passage 134 where the high-pressure oil pump 600 is not arranged, which can improve the lubrication capacity of the intake camshaft and the intake side cam bearing hole 111, the drive tappet and the oil pump tappet mounting hole 165.

[0062] In combination with Figure 3 and Figure 4As shown, according to some embodiments of the present application, the included angle a1 between the axis of the first upper oil passage 131 and the axis of the first branch oil passage 132 is 90-150°.

[0063] Specifically, the first upper oil passage 131 and the axis of the first branch oil passage 132 form an obtuse angle (i.e. greater than 90°), which can make more lubricating oil of the first upper oil passage 131 enter the intake side oil passage 133 after impacting the inner wall of the first branch oil passage 132, thereby increasing the amount of lubricating oil supplied to the intake side oil passage 133 when the engine 1000 starts, before the working oil pressure of the lubricating oil is stable, and quickly forming an oil film between the friction pairs with greater stress (the oil pump driving tappet and the oil pump tappet mounting hole 165), thereby reducing the friction between the friction pairs with greater stress.

[0064] At the same time, the included angle a1 between the first upper oil passage 131 and the axis of the first branch oil passage 132 should be less than 150° (i.e. 90-150°, not including the endpoints), to prevent too much lubricating oil from being supplied to the intake side oil passage 133 when the engine 1000 starts, causing insufficient lubricating oil on the exhaust side, to ensure reliable and stable lubrication of the exhaust side lubricating part 120.

[0065] Next, the structure of the pre-supply unit 150 of the embodiments of the present application will be described in detail.

[0066] First of all, it should be pointed out that the current solutions to the problem of wear and tear of engine 1000 parts after the engine 1000 has been started for a long time mainly use the following three modes, which are as follows: (1) On the basis of the existing cylinder head lubrication system 100, an auxiliary lubrication electronic oil pump and oil passage are added to pump lubricating oil to the oil passage before starting, but this will increase the design and development and procurement costs of the engine 1000, but the electronic oil pump has insufficient anti-particle ability and is prone to jamming problems, which leads to a decrease in auxiliary lubrication performance and fails to achieve the desired effect; (2) An electric heating system is added to heat the temperature of the lubricating oil, which will also increase the design and development and procurement costs of the engine 1000, and the power consumption is high, which will exacerbate the loss of electric power; (3) The wear resistance of the bearing is increased, and high wear-resistant materials are used, which can increase the reliability of the engine 1000 during operation, but does not solve the problem of wear and tear.

[0067] Based on this, the pre-provision unit 150 is arranged in the cylinder cover lubrication system 100, a local oil film is formed before the engine 1000 starts through the pre-provision unit 150, a complete oil film is formed after the camshaft (the intake camshaft 400 and the exhaust camshaft 500) rotates, thereby reducing the friction between the friction pairs, reducing the wear between the camshaft and the bearing hole, reducing the abnormal wear between the friction pairs, improving the operation reliability of the engine 1000, and reducing the design and development cost of the engine 1000.

[0068] As shown in Figure 2 and Figure 3 , the application provides a cylinder cover lubrication system 100, which comprises: an intake side lubrication part 110, an exhaust side lubrication part 120, a first supply unit 130, and a pre-provision unit 150, the intake side lubrication part 110 and the exhaust side lubrication part 120 are both multiple, the intake side lubrication part 110 is an intake side cam bearing hole 111 and an intake valve tappet mounting hole 112, the exhaust side lubrication part 120 is an exhaust side cam bearing hole 121 and an exhaust valve tappet mounting hole 122; one end of the first supply unit 130 is in communication with the cylinder body oil way, and the other end is in communication with the intake side lubrication part 110 and the exhaust side lubrication part 120, so as to supply lubricating oil to the intake side lubrication part 110 and the exhaust side lubrication part 120; the pre-provision unit 150 comprises: multiple intake side oil grooves 151 and multiple exhaust side oil grooves 152, and the intake side oil grooves 151 are arranged corresponding to the intake side cam bearing holes 111, and the exhaust side oil grooves 152 are arranged corresponding to the exhaust side cam bearing holes 121, the pre-provision unit 150 is spaced apart from the first supply unit 130 and is adapted to store lubricating oil.

[0069] Among them, the intake side lubrication part 110 comprises multiple intake side cam bearing holes 111 and multiple intake valve tappet mounting holes 112, the exhaust side lubrication part 120 comprises multiple exhaust side cam bearing holes 121 and multiple exhaust valve tappet mounting holes 122, and the first supply unit 130 is in communication with the cylinder body rear end oil way 220, and the first supply unit 130 is in communication with the intake side lubrication part 110 and the exhaust side lubrication part 120.

[0070] The pre-provision unit 150 can realize the establishment of the initial oil film in the intake side cam bearing hole 111 and the exhaust side cam bearing hole 121 before the engine 1000 starts, that is, when the engine 1000 is not started for a long time, the last time the oil film formed between the camshaft and the cam bearing hole will flow back to the oil pan, and it is easy to appear the state that there is no lubricating oil between the camshaft and the cam bearing hole.

[0071] Furthermore, when the engine 1000 starts, the lubricating oil stored in the intake side oil groove 151 and exhaust side oil groove 152 for a short period of time before the working oil pressure of the lubricating oil stabilizes can form an initial oil film before the working oil pressure stabilizes, thereby reducing the dry friction between the camshaft and the cam bearing hole, which are subjected to greater forces, and reducing the wear between the camshaft and the cam bearing hole.

[0072] It is understandable that the intake side oil groove 151 and the exhaust side oil groove 152 are separated from the first supply unit 130, that is, separated from the intake side oil distribution channel 133 and the exhaust side oil distribution channel 134. This ensures that when the engine 1000 is stopped, the lubricating oil stored in the intake side oil groove 151 and the exhaust side oil groove 152 will not flow back to the oil pan. At the same time, when the engine is stopped, the oil pump operates under the rotational inertia force of the crankshaft or camshaft, and the oil pressure drops rapidly. When the lubricating oil pressure is insufficient to overcome gravity to transport the lubricating oil to the intake side oil distribution channel 133 and the exhaust side oil distribution channel 134, the lubricating oil in the intake side oil groove 151 and the exhaust side oil groove 152 can make up for the camshaft lubrication during the shutdown phase.

[0073] According to the cylinder head lubrication system 100 of the present application embodiment, the pre-supply unit 150 establishes an initial oil film before the engine 1000 starts, and in conjunction with the first supply unit 130, quickly maintains the stability of the oil film after the engine 1000 starts, which can improve the working stability of the engine 1000, effectively alleviate the wear of the friction pair, and extend the service life of the engine 1000.

[0074] like Figure 6 As shown, according to some embodiments of this application, the intake side oil groove 151 is located at the bottom end of the intake side cam bearing hole 111, and the exhaust side oil groove 152 is located at the bottom end of the exhaust side cam bearing hole 121.

[0075] In this way, when the engine 1000 is in a stopped state, the lubricating oil that lubricates the intake camshaft 400 and the exhaust camshaft 500 can flow back into the intake side oil groove 151 and the exhaust side oil groove 152 under the action of its own gravity, so as to achieve the preservation of lubricating oil.

[0076] It is understood that in the embodiments of this application, the arc length of the exhaust-side oil groove 152 is less than or equal to half the arc length of the exhaust-side cam bearing hole 121, the arc length of the intake-side oil groove 151 is less than or equal to half the arc length of the intake-side cam bearing hole 111, and / or the width of the exhaust-side oil groove 152 is less than or equal to the width of the exhaust-side cam bearing hole 121, and the width of the intake-side oil groove 151 is less than or equal to the width of the intake-side cam bearing hole 111.

[0077] In this way, the two sides of the intake side oil groove 151, the two axial sides of the exhaust side oil groove 152, and at least one of the two axial sides are not connected, which can improve the retention effect of lubricating oil and prevent lubricating oil from flowing back to the oil pan.

[0078] It should be noted that the cylinder head 300 includes a cylinder head body and a cylinder head cover. The cylinder head body and the cylinder head cover enclose a space for accommodating the camshaft. The exhaust-side oil groove 152 and the intake-side oil groove 151 are both formed on the cylinder head body. Two rows of multiple arc-shaped grooves are opened on the cylinder head body, and two rows of multiple arc-shaped grooves are also opened on the cylinder head cover. The two are combined to form a row of multiple intake-side cam bearing holes 111 and a row of multiple exhaust-side cam bearing holes 121. Half of the arc length of the intake-side cam bearing hole 111 as defined in this application refers to half of the arc length of the arc-shaped groove on the cylinder head body that defines the intake-side cam bearing hole 111, and half of the arc length of the exhaust-side cam bearing hole 121 refers to half of the arc length of the arc-shaped groove on the cylinder head body that defines the exhaust-side cam bearing hole 121.

[0079] In this way, the two sides of the intake side oil groove 151, the two axial sides of the exhaust side oil groove 152, and at least one of the two axial sides are not connected, which can improve the retention effect of lubricating oil and prevent lubricating oil from flowing back to the oil pan.

[0080] According to some embodiments of this application, in the vertical direction, the area where the intake side oil groove 151 intersects with the intake side cam bearing hole 111 is located below the area where the intake side supply oil passage 135 intersects with the intake side cam bearing hole, and the area where the exhaust side oil groove 152 intersects with the exhaust side cam bearing hole 121 is located below the area where the exhaust side supply oil passage 136 intersects with the exhaust side cam bearing hole.

[0081] In this way, the position of the intake side oil groove 151 can be relatively lower than the intake side camshaft bearing hole 111 and lower than the intersection area between the intake side oil supply passage 135 and the intake side camshaft bearing hole 111. Similarly, the position of the exhaust side oil groove 152 can be relatively lower than the exhaust side camshaft bearing hole 121 and lower than the intersection area between the exhaust side oil supply passage 136 and the exhaust side camshaft bearing hole 121. This allows the exhaust side oil groove 152 and the intake side oil groove 151 to be deeper and have a better isolation effect. This not only prevents the lubricating oil in the intake side oil groove 151 and the exhaust side oil groove 152 from flowing back to the oil pan, but also allows more lubricating oil to be retained, thereby improving the initial oil film establishment effect before the engine 1000 starts.

[0082] like Figure 6 As shown, according to some embodiments of this application, the intake side oil groove 151 is located at the front end of the intake side oil supply passage 135 in the rotation direction of the intake camshaft 400, and the exhaust side oil groove 152 is located at the front end of the exhaust side oil supply passage 136 in the rotation direction of the exhaust camshaft 500.

[0083] That is, relative to the intake side supply oil passage 135 and the exhaust side supply oil passage 136, the intake side oil groove 151 and the exhaust side oil groove 152 are arranged at the front end in the camshaft rotation direction, and in the normal operation process of the camshaft, with the rotation of the camshaft, the oil film is formed between the camshaft and the cam bearing hole, at the same time, the inertia thrown out lubricating oil can be collected and stored by the exhaust side oil groove 152 and the intake side oil groove 151, and the lubricating oil collection difficulty of the exhaust side oil groove 152 and the intake side oil groove 151 is reduced.

[0084] In combination Figure 3 , Figure 4 and Figure 6 , according to some embodiments of the present application, the cylinder head lubrication system 100 further comprises: a high-pressure oil pump lubrication part 160, the high-pressure oil pump lubrication part 160 comprises: an oil pump supply oil passage 161, a ring oil passage 162, a vertical oil passage 163, and a horizontal oil passage 164, one end of the oil pump supply oil passage 161 is in communication with the first supply unit 130, the other end of the oil pump supply oil passage 161 is in communication with the ring oil passage 162, the ring oil passage 162, the vertical oil passage 163, and the horizontal oil passage 164 are sequentially communicated, and the horizontal oil passage 164 is in communication with the oil pump tappet mounting hole 165 to lubricate the high-pressure oil pump 600 (i.e. the driving tappet of the high-pressure oil pump 600).

[0085] Specifically, the pressure lubricating oil in the intake side branch oil passage 133 enters the ring oil passage 162 through the oil pump supply oil passage 161, and the ring oil passage 162 is arranged on the intake side cam bearing hole 111 as a part of the intake side cam bearing hole 111, part of the lubricating oil in the ring oil passage 162 lubricates the intake side cam bearing hole 111 where the ring oil passage 162 is located, and part of the lubricating oil enters the oil pump tappet mounting hole 165 through the vertical oil passage 163 and the horizontal oil passage 164 to lubricate the driving tappet in the oil pump tappet mounting hole 165, thereby reducing the friction and wear between the driving tappet and the oil pump tappet mounting hole 165.

[0086] As shown in Figure 3 and Figure 4 , according to some embodiments of the present application, the ring oil passage 162 is arranged around one intake side cam bearing hole 111, and the oil pump supply oil passage 161 is located on the side of the intake side cam bearing hole 111, and the intake side cam bearing hole 111 is located at the last end of the cylinder head 300.

[0087] Among them, the ring oil passage 162 surrounds the intake side cam bearing hole 111 located at the last end of the cylinder head 300, and the side of the intake side cam bearing hole 111 is provided with the oil pump supply oil passage 161 and the intake side supply oil passage 135, which can ensure that the lubricating oil distributed to the intake side branch oil passage 133 by the first branch oil passage 132 first enters the intake side cam bearing hole 111 provided with the ring oil passage 162 through the intake side supply oil passage 135, so as to lubricate the intake camshaft and the intake side cam bearing hole 111.

[0088] At the same time, the oil supplied by the oil pump supply channel 161 enters the ring oil channel 162, the vertical oil channel 163, the horizontal oil channel 164 to the oil pump tappet mounting hole 165, lubricates the driving tappet and the oil pump tappet mounting hole 165, and can quickly supply lubricating oil to the friction pair with large initial starting stress when the engine 1000 starts. Before the working oil pressure of the lubricating oil is stable, an oil film is quickly formed between the friction pairs with large stress, thereby reducing the friction between the friction pairs with large stress, reducing the wear between the driving tappet and the oil pump tappet mounting hole 165, reducing the wear caused by poor initial lubrication between the friction pairs, improving the working stability and reliability of the high-pressure pump, and reducing the wear and improving the service life.

[0089] It can be understood that the cylinder head 300 includes a cylinder head body and a cylinder head cover, and the intake side cam bearing hole 111 provided with the ring oil channel 162 can be divided into four regions, which are a first circumferential hole section d from one end of the vertical oil channel 163 to the intake side supply oil channel 135, a second circumferential hole section c from the intake side supply oil channel 135 to the intake side oil groove 151, a third circumferential hole section b from the intake side supply oil channel 135 to the side end of the cylinder head 300, and a fourth circumferential hole section a from the side end of the cylinder cover to the end of the vertical oil channel 163.

[0090] The ring oil channel 162 surrounds the intake side cam bearing hole 111 at the last end of the cylinder head 300, and the intake side cam bearing hole 111 at the last end is subjected to a larger reaction force than other intake side cam bearing holes 111 during normal operation of the driving high-pressure oil pump 600. The intake side cam bearing hole 111 is provided with the intake side oil groove 151, so that at least part of the lubricating oil in the intake side oil groove 151 can flow through the ring oil channel 162, the vertical oil channel 163, and the horizontal oil channel 164 to lubricate the driving tappet, the oil pump tappet mounting hole 165, and the fourth circumferential hole section a.

[0091] At least part of the lubricating oil in the ring oil channel 162 can also flow back into the first circumferential hole section d under the dual action of the rotation of the intake camshaft 400 and gravity, and sequentially lubricate the first circumferential hole section d, the second circumferential hole section c, and the third circumferential hole section b, completing the segmented and regional lubrication of the entire intake camshaft 400 bearing hole. The lubrication path length of the lubricating oil is effectively reduced, the oil film coverage of the entire intake side cam bearing hole 111 before the working oil pressure is stabilized is ensured, the wear between the driving tappet and the oil pump tappet mounting hole 165, the intake side camshaft, and the intake side cam bearing hole 111 is reduced, and the wear caused by poor initial lubrication is reduced.

[0092] Exemplarily, the cross-sectional shape of the intake side oil groove 151 and the exhaust side oil groove 152 is any one of a circle, an ellipse, and a rectangle.

[0093] In this way, the projection profiles of the exhaust-side oil groove 152 and the intake-side oil groove 151 are regular, the machining difficulty can be reduced, and the lubricating oil storage effect can be good.

[0094] It can be understood that the cylinder head lubricating system 100 in the embodiment of the application is arranged in the cylinder head 300, and the application provides a cylinder head 300, which comprises the cylinder head lubricating system 100 in the above embodiment. The cylinder head 300 adopting the cylinder head lubricating system 100 in the embodiment of the application can improve the lubricating effect inside the cylinder head 300, reduce the wear of the cylinder head 300, and prolong the service life of the cylinder head 300.

[0095] As shown in FIGS. Figure 1 and Figure 2 The application provides an engine 1000, which comprises a cylinder head 300 and a cylinder body. The cylinder head 300 is provided with the cylinder head lubricating system 100 in the above embodiment. The cylinder body is provided with a cylinder body lubricating system 200. The cylinder body lubricating system 200 comprises a cylinder body front-end oil supply passage 210 and a cylinder body rear-end oil supply passage 220. The cylinder body front-end oil supply passage 210 is in communication with the second supply unit 140. The cylinder body rear-end oil supply passage 220 is in communication with the first supply unit 130.

[0096] Therefore, the lubricating oil in the oil pan can be effectively lubricated to the friction pairs in the cylinder body through the cylinder body lubricating system 200, and further supplied to the cylinder head lubricating system 100 through the cylinder body lubricating system 200 to effectively lubricate the friction pairs in the cylinder head 300, so as to improve the lubricating effect of the engine lubricating system 700. In particular, the oil film can be quickly established when the engine 1000 is initially started, so as to effectively reduce the wear of the engine 1000 and prolong the service life of the engine 1000.

[0097] According to some embodiments of the application, a one-way valve or a stop valve is arranged in the first oil supply passage 131 of the first supply unit 130, the second oil supply passage 141 of the second supply unit 140, or the cylinder body front-end oil supply passage 210 and the cylinder body rear-end oil supply passage 220.

[0098] Specifically, in order to further improve the initial lubricating effect when the engine 1000 is started, a one-way valve can be arranged in the first oil supply passage 131 of the first supply unit 130, the second oil supply passage 141 of the second supply unit 140, or the cylinder body front-end oil supply passage 210 and the cylinder body rear-end oil supply passage 220. When the engine 1000 is running, the one-way valve is opened to allow the lubricating oil to enter the cylinder head lubricating system 100. After the engine 1000 is stopped, the one-way valve is closed to retain the lubricating oil in the cylinder head lubricating system 100. The next time the engine 1000 is started, the lubricating oil can be used for lubricating the related friction pairs to quickly establish the oil film.

[0099] Of course, the same technical effects can be achieved by setting a check valve in the first oil supply passage 131 of the first supply unit 130, the second oil supply passage 141 of the second supply unit 140, the cylinder front end oil supply passage 210, and the cylinder rear end oil supply passage 220, and a detailed description is not repeated here.

[0100] As shown in FIG. 1, Figure 1 The engine 1000 provided by the application comprises a cylinder, a cylinder head 300, and a cylinder head lubricating system 100 arranged on the cylinder, and the cylinder head lubricating system 100 is arranged on the cylinder head 300.

[0101] The engine 1000 provided by the application can improve the working stability of the engine 1000, prolong the service life of the engine 1000, and make the engine 1000 applicable to a use scenario in which the engine 1000 is not frequently started, and after being started, the engine 1000 needs to be operated at a medium or high load for a short time.

[0102] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0103] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A cylinder head lubrication system, characterized in that, include: The intake-side lubrication section (110) and the exhaust-side lubrication section (120) are multiple. The intake-side lubrication section (110) is an intake-side camshaft bearing hole (111) and an intake valve tappet mounting hole (112). The exhaust-side lubrication section (120) is an exhaust-side camshaft bearing hole (121) and an exhaust valve tappet mounting hole (122). The first supply unit (130) has one end connected to the cylinder oil passage and the other end connected to the intake side lubrication section (110) and the exhaust side lubrication section (120) to supply lubricating oil to the intake side lubrication section (110) and the exhaust side lubrication section (120). The second supply unit (140) has one end connected to the cylinder block oil passage and the other end connected to an intake-side camshaft bearing hole (111) and an exhaust-side camshaft bearing hole (121) located at the front end of the cylinder head (300); wherein The first supply unit (130) and the second supply unit (140) introduce lubricating oil from both ends of the length of the cylinder head (300).

2. The cylinder head lubrication system according to claim 1, characterized in that, The first supply unit (130) includes: a first upper oil passage (131), a first branch oil passage (132), an intake-side branch oil passage (133), an exhaust-side branch oil passage (134), an intake-side supply oil passage (135), and an exhaust-side supply oil passage (136). One end of the first upper oil passage (131) is connected to the cylinder block oil passage, and the other end is connected to the first branch oil passage (132). The first branch oil passage (132) is connected to the intake-side branch oil passage (133) and the exhaust-side branch oil passage (136). 4) Connected, the exhaust side oil distribution channel (134) is connected to the exhaust side supply oil channel (136) and the exhaust valve tappet mounting hole (122), the intake side oil distribution channel (133) is connected to the intake side supply oil channel (135) and the intake valve tappet mounting hole (112), the intake side supply oil channel (135) is connected to the intake side camshaft bearing hole (111), and the exhaust side supply oil channel (136) is connected to the exhaust side camshaft bearing hole (121); The second supply unit (140) includes: a second upper oil passage (141), a second branch oil passage (142), a timing intake upper oil passage (143), and a timing exhaust upper oil passage (144). One end of the second upper oil passage (141) is connected to the cylinder block oil passage, and the other end is connected to the second branch oil passage (142). The second branch oil passage (142) is connected to the timing intake upper oil passage (143) and the timing exhaust upper oil passage (144). The timing exhaust upper oil passage (144) is connected to the front timing exhaust bearing hole (1211) located at the front end of the cylinder head (300). The timing intake upper oil passage (143) is connected to the front timing intake bearing hole (1111) located at the front end of the cylinder head (300).

3. The cylinder head lubrication system according to claim 2, characterized in that, Along the length of the cylinder head (300), the timing intake upper oil passage (143) is located at the rear end of the front timing intake bearing hole (1111), and the corresponding intake side supply oil passage (135) is located at the front end of the front timing intake bearing hole (1111); the timing exhaust upper oil passage (144) is located at the rear end of the front timing exhaust bearing hole (1211), and the corresponding exhaust side supply oil passage (136) is located at the front end of the front timing exhaust bearing hole (1211).

4. The cylinder head lubrication system according to claim 2, characterized in that, Also includes: The high-pressure oil pump lubrication section (160) includes: an oil pump supply passage (161), an annular oil passage (162), a vertical oil passage (163), and a horizontal oil passage (164). One end of the oil pump supply passage (161) is connected to the first supply unit (130), and the other end of the oil pump supply passage (161) is connected to the annular oil passage (162). The annular oil passage (162), the vertical oil passage (163), and the horizontal oil passage (164) are connected in sequence, and the horizontal oil passage (164) is connected to the oil pump tappet mounting hole (165) to lubricate the high-pressure oil pump (600).

5. The cylinder head lubrication system according to claim 4, characterized in that, The annular oil passage (162) is arranged around an intake-side camshaft bearing hole (111), and the oil pump supply passage (161) is located on the periphery of the intake-side camshaft bearing hole (111), which is located at the rear end of the cylinder head (300).

6. The cylinder head lubrication system according to claim 4, characterized in that, In the height direction of the cylinder head (300), the intake side oil passage (133) is located above the exhaust side oil passage (134).

7. The cylinder head lubrication system according to claim 6, characterized in that, The angle α1 between the axis of the first upper oil passage (131) and the axis of the first branch oil passage (132) is 90°-150°.

8. The cylinder head lubrication system according to any one of claims 1-7, characterized in that, Also includes: The pre-supply unit (150) includes: a plurality of intake-side oil grooves (151) and a plurality of exhaust-side oil grooves (152), wherein the intake-side oil grooves (151) are provided corresponding to the intake-side cam bearing hole (111), and the exhaust-side oil grooves (152) are provided corresponding to the exhaust-side cam bearing hole (121). The pre-supply unit (150) is spaced apart from the first supply unit (130) and is adapted to store lubricating oil.

9. An engine, characterized in that, include: Cylinder head, the cylinder head having a cylinder head lubrication system as described in any one of claims 1-8; The cylinder block has a cylinder lubrication system (200), which includes an upper oil passage (210) at the front end of the cylinder block and an upper oil passage (220) at the rear end of the cylinder block. The upper oil passage (210) at the front end of the cylinder block is connected to the second supply unit (140), and the upper oil passage (220) at the rear end of the cylinder block is connected to the first supply unit (130).

10. The engine according to claim 9, characterized in that, A check valve or a shut-off valve is provided in the first oil passage (131) of the first supply unit (130) and the second oil passage (141) of the second supply unit (140), or a check valve or a shut-off valve is provided in the oil passage (210) at the front end of the cylinder and the oil passage (220) at the rear end of the cylinder.

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