Engine lubricating system and engine

Abstract

The embodiment of the invention provides an engine lubricating system and an engine, and relates to the technical field of engines. The engine lubricating system comprises a cylinder body, a cam shaft and a rocker arm structure. The rocker arm structure comprises a plurality of rocker arm shafts, the rocker arm shafts are sequentially and coaxially arranged on the cylinder body in the first direction, first oil channels are formed in the rocker arm shafts, the cylinder body is provided with two oil inlet channels, the two oil inlet channels are arranged in the first direction, and the two oil inlet channels communicate with the two first oil channels on the outermost side correspondingly. The two oil inlet channels are arranged to communicate with the first oil channels in the two rockshafts on the outermost side correspondingly, so that engine oil can be injected from the two ends of the rockshafts at the same time, and a two-way flowing path is formed. Compared with a traditional single-end oil supply mode, engine oil does not need to flow from one end to the other end in a long distance, a transmission route is shortened, pressure loss of a single path is reduced, it is ensured that all shaft sections are evenly lubricated, and the lubricating effect of an engine lubricating system is improved.

Description

Technical Field

[0001] The present application relates to engine technology, and in particular to an engine lubrication system and an engine. Background Art

[0002] The engine is the core power component of a vehicle, capable of driving the vehicle. Currently, engines include methanol engines. Compared with traditional gasoline or diesel engines, methanol engines produce relatively less carbon dioxide during operation, which can greatly reduce pollutant emissions. In addition, the cost of methanol raw materials is usually lower than gasoline and diesel, which helps to reduce vehicle operating costs.

[0003] An engine typically has a lubrication system, consisting of an oil pan, a filter, an oil pump, an oil cooler, an oil filter, a main oil gallery, and other components. Oil is pumped from the oil pan through the filter and into the oil filter. After being filtered by the oil filter, the oil enters the oil cooler for cooling. It then enters the engine's main oil gallery, flows through various lubrication points, and finally returns to the oil pan through various return oil channels. In related art, when lubricating a rocker arm shaft, oil from the main oil gallery flows from one end to the other.

[0004] However, the rocker arm shaft is long, resulting in a long transmission path for the engine oil when lubricating the rocker arm shaft, and a poor lubrication effect. Summary of the Invention

[0005] In view of this, the present application provides an engine lubrication system and an engine, which can improve the lubrication effect of the engine lubrication system.

[0006] To achieve the above objectives, the present application provides an engine lubrication system and an engine, which adopt the following technical solutions:

[0007] In a first aspect, the present application provides an engine lubrication system, comprising a cylinder block, a camshaft, and a rocker arm structure;

[0008] The rocker arm structure includes a plurality of rocker arm shafts; the plurality of rocker arm shafts are coaxially arranged in sequence along a first direction on the cylinder body; a first oil passage is provided in the rocker arm shaft, the first oil passage can supply oil to the side wall of the rocker arm shaft, and the first oil passages of the plurality of rocker arm shafts are connected in sequence along the first direction;

[0009] The camshaft is rotatably disposed on the cylinder body, the camshaft extends along the first direction, and the camshaft is drivingly connected to the plurality of rocker arm shafts;

[0010] The cylinder body is provided with two oil inlet passages, the two oil inlet passages are arranged along the first direction, and the two oil inlet passages are respectively connected to the two outermost first oil passages;

[0011] The cylinder block is further provided with a second oil passage, which is communicated with the first oil passage and can supply oil to the camshaft.

[0012] In one possible implementation, the engine lubrication system provided by the present application, the cylinder body is provided with a plurality of mounting seats, the plurality of mounting seats are arranged along a first direction, and the mounting seats are provided with mounting cavities;

[0013] The rocker arm shaft has a mounting portion, and the mounting portion is located in the mounting cavity;

[0014] A first radial oil passage is defined in the mounting portion, a first end of the first radial oil passage is communicated with the first oil passage, and a second end of the first radial oil passage is communicated with the mounting cavity.

[0015] In one possible implementation, in the engine lubrication system provided in the present application, the mounting portion is provided with a first annular oil channel, the axis of the first annular oil channel coincides with the axis of the mounting portion, and the first annular oil channel connects the mounting cavity and the first radial oil channel.

[0016] In a possible implementation, the engine lubrication system provided by the present application, the cylinder body is provided with a rotating seat, the rotating seat is provided on the corresponding mounting seat; the rotating seat is provided with a rotating port;

[0017] The camshaft is provided with a rotating portion, and the rotating portion is inserted into the rotating opening;

[0018] A first end of the second oil passage is communicated with the installation cavity, and a second end of the second oil passage is communicated with the rotation port.

[0019] In one possible implementation, the engine lubrication system provided by the present application is configured such that a second annular oil passage and a second radial oil passage are formed on a portion of the rocker arm shaft where the mounting portion is not provided, and an axis of the second annular oil passage coincides with an axis of the rocker arm shaft.

[0020] A rocker arm member is rotatably provided on the rocker arm shaft, and the rocker arm member covers the second annular oil passage;

[0021] The second annular oil passage is connected to the first oil passage through the second radial oil passage. The second annular oil passage is also connected to the gap between the rocker arm member and the rocker arm shaft.

[0022] In a possible implementation, in the engine lubrication system provided by the present application, the cylinder body is provided with an oil pan, the oil pan is used to receive the oil from the rotating port, and the oil pan can supply oil to the oil inlet passage.

[0023] In one possible implementation, the engine lubrication system provided by the present application, the oil inlet passage has a first output port and a second output port that are independent of each other;

[0024] The oil inlet passage is connected to the first oil passage through the first output port, and the oil inlet passage can supply oil to the idler gear through the second output port.

[0025] In one possible implementation, the engine lubrication system provided by the present application, the cylinder body is provided with a mounting hole, the mounting hole extends along the first direction, and the cylinder body is provided with an end cover capable of closing the mounting hole;

[0026] The plurality of rocker shafts include a first rocker shaft and a second rocker shaft;

[0027] The first rocker arm shaft is provided with a retaining spring, and the first rocker arm shaft is connected to the cylinder body through the retaining spring; the end of the second rocker arm shaft away from the first rocker arm shaft abuts against the end cover.

[0028] In one possible implementation, the engine lubrication system provided by the present application has a plurality of rocker arm structures, the plurality of rocker arm structures are arranged along the second direction, and the oil inlet passage is connected to the first oil passages of the plurality of rocker arm structures;

[0029] The first direction is perpendicular to the second direction.

[0030] In a second aspect, the present application provides an engine, comprising a body and the above-mentioned engine lubrication system, wherein the body is connected to the engine lubrication system.

[0031] The present application provides an engine lubrication system and an engine, wherein the engine lubrication system includes a cylinder block, a camshaft, and a rocker arm structure. The rocker arm structure includes multiple rocker arm shafts, which are coaxially arranged in a first direction in the cylinder block. A first oil passage is provided within the rocker arm shaft, capable of supplying oil to the sidewalls of the rocker arm shafts, and the first oil passages of the multiple rocker arm shafts are connected in sequence along the first direction. A camshaft is rotatably arranged in the cylinder block, extending in the first direction, and is drivingly connected to the multiple rocker arm shafts. The cylinder block is provided with two oil inlet passages, which are arranged in the first direction and respectively connect to the two outermost first oil passages. The cylinder block is also provided with a second oil passage, which connects to the first oil passage and can supply oil to the camshaft. By providing two oil inlet passages, respectively connecting to the first oil passages of the two outermost rocker arm shafts, engine oil can be injected simultaneously from both ends of the rocker arm shaft, forming a bidirectional flow path. Compared with the traditional single-end oil supply method, the engine oil does not need to flow a long distance from one end to the other, which shortens the transmission route, reduces the pressure loss of a single path, ensures uniform lubrication of each shaft section, and improves the lubrication effect of the engine lubrication system.

[0032] In addition to the technical problems solved by the embodiments of the present application described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the technical solutions provided by the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation methods described here are only used to illustrate and explain the present application, and the present application is not limited to the specific implementation methods described below.

[0034] Figure 1 A schematic diagram of a portion of the structure of an engine provided in an embodiment of the present application;

[0035] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of part A;

[0036] Figure 3 A schematic diagram of a portion of the internal structure of an engine provided in an embodiment of the present application;

[0037] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of part B;

[0038] Figure 5 for Figure 3 Schematic diagram of the enlarged structure of part C;

[0039] Figure 6 A schematic diagram of a portion of the internal structure of a rocker arm shaft and a camshaft provided in an embodiment of the present application;

[0040] Figure 7 A schematic diagram of the internal structure of the first end of the cylinder provided in an embodiment of the present application;

[0041] Figure 8 A schematic diagram of the internal structure of the second end of the cylinder provided in an embodiment of the present application;

[0042] Figure 9 A schematic diagram of the flow channel structure of the engine oil in the cylinder provided by an embodiment of the present application;

[0043] Figure 10 A schematic diagram of the structure of an engine lubrication system provided in an embodiment of the present application;

[0044] Figure 11 This is a schematic structural diagram of the rocker arm shaft and retaining spring provided in an embodiment of the present application.

[0045] Description of reference numerals:

[0046] 10. Oil filter; 20. Oil cooler; 11. Oil pump; 30. Oil filter; 40. Main oil gallery; 50. Piston cooling nozzle; 60. Main bearing; 70. Crankshaft; 80. Connecting rod bearing; 90. Idle gear; 100. Cylinder block; 101. Oil inlet gallery; 102. Secondary oil gallery; 103. Mounting hole; 104. First oil outlet; 105. Secondary oil outlet; 200. Camshaft; 300. Rocker arm structure; 310. Rocker shaft; 320, rocker member; 310a, first rocker shaft; 310b, second rocker shaft; 301, first oil channel; 302, mounting portion; 303, first radial oil channel; 304, first annular oil channel; 305, second annular oil channel; 306, second radial oil channel; 400, mounting seat; 401, mounting cavity; 500, rotating seat; 501, rotating port; 600, oil pan; 700, end cover; 800, retaining ring.

[0047] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The embodiments of the present application are described in detail below in conjunction with the drawings.

[0049] In the description of the embodiments of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to a fixed connection, an indirect connection via an intermediate medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0050] In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0051] In the description of the embodiments of the present application, “plurality” means two or more, unless otherwise precisely and specifically specified.

[0052] The terms "first", "second", "third", "fourth", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0053] In addition, the terms "comprises" and "having" and any variations thereof are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, product or apparatus.

[0054] The engine is the core power component of a vehicle, capable of driving the vehicle. Currently, engines include methanol engines. Compared with traditional gasoline or diesel engines, methanol engines produce relatively less carbon dioxide during operation, which can greatly reduce pollution emissions. At the same time, in order to ensure national energy security and reduce dependence on oil, methanol is the best alternative energy source to oil. The price of methanol is usually lower than gasoline and diesel. Using methanol as fuel can reduce vehicle operating costs.

[0055] An engine typically has a lubrication system, consisting of an oil pan, oil filter, oil pump, oil cooler, oil filter, main oil gallery, and other components. Oil is pumped from the oil pan through the oil filter by the oil pump. After being filtered by the oil filter, the oil enters the oil cooler for cooling. It then enters the engine's main oil gallery, flows through various lubricated parts, and finally returns to the oil pan through various return channels.

[0056] To achieve the practicality of methanol engines, reducing fuel consumption, improving fuel economy, and reducing friction between friction pairs are crucial. The design of an efficient lubrication system is also crucial. This system can also cool engine components, promptly dissipating the significant heat generated during engine operation, preventing overheating and ensuring the engine operates within a suitable temperature range, thereby improving engine reliability and stability. In related technologies, oil flowing from the main oil channel flows from one end of the rocker shaft to the other when lubricating the rocker shaft. However, the long length of the rocker shaft results in a long oil transfer path, resulting in poor lubrication.

[0057] Based on the above technical problems, an embodiment of the present application provides an engine lubrication system and an engine. In this technical solution, the engine lubrication system includes a cylinder block, a camshaft, and a rocker arm structure. The rocker arm structure includes multiple rocker arm shafts, which are coaxially arranged in the cylinder block in a first direction. A first oil passage is provided within the rocker arm shaft, capable of supplying oil to the sidewalls of the rocker arm shafts, and the first oil passages of the multiple rocker arm shafts are connected in sequence along the first direction. A camshaft is rotatably arranged in the cylinder block, extending in the first direction, and is transmission-connected to the multiple rocker arm shafts. The cylinder block is provided with two oil inlet passages, which are arranged in the first direction and respectively connect to the two outermost first oil passages. The cylinder block is also provided with a second oil passage, which connects to the first oil passage and can supply oil to the camshaft. By providing two oil inlet passages, respectively connecting to the first oil passages of the two outermost rocker arm shafts, engine oil can be injected simultaneously from both ends of the rocker arm shaft, forming a bidirectional flow path. Compared with the traditional single-end oil supply method, the engine oil does not need to flow a long distance from one end to the other, which shortens the transmission route, reduces the pressure loss of a single path, ensures uniform lubrication of each shaft section, and improves the lubrication effect of the engine lubrication system.

[0058] The purpose is to reasonably arrange the distribution of engine oil in the engine lubrication system, and accurately deliver the engine oil to various key friction parts of the engine, such as the crankshaft main journal, connecting rod bearing diameter, piston cylinder hole, camshaft shaft diameter, rocker arm shaft diameter, rocker arm, gear and other friction pairs, to form a good oil film, effectively reduce the friction loss between parts, improve the mechanical efficiency of the engine, reduce engine fuel consumption, improve fuel economy, and extend the service life of the engine.

[0059] It should be noted that Figures 1 to 11 The schematic diagram of the engine lubrication system and the components in the engine is shown. The specific structure of the engine lubrication system and the other components in the engine are not limited to Figures 1 to 11 of examples.

[0060] The present application is described in detail below with reference to the accompanying drawings and specific embodiments:

[0061] An embodiment of the present application provides an engine lubrication system, which includes a cylinder block 100 , a camshaft 200 and a rocker arm structure 300 .

[0062] The rocker arm structure 300 includes a plurality of rocker arm shafts 310, and the plurality of rocker arm shafts 310 are coaxially arranged on the cylinder body 100 in sequence along the first direction. Figures 1 to 3 The first direction is the direction indicated by the X arrow in the figure. It should also be noted that, unless otherwise specified, the directions indicated by the X, Y, and Z arrows in the figures are perpendicular to each other in three-dimensional space. The multiple rocker arm shafts 310 in the same rocker arm structure 300 are coaxially arranged in sequence in the direction indicated by the X arrow.

[0063] A first oil passage 301 is provided within the rocker shaft 310. The first oil passage 301 of each of the rocker shafts 310 is interconnected sequentially along a first direction. The axis of the first oil passage 301 can coincide with or be parallel to the axis of the rocker shaft 310. To ensure uniform oil pressure on the sidewalls of the rocker shaft 310, the axis of the first oil passage 301 is aligned with the axis of the rocker shaft 310. The interconnection of the first oil passages 301 of each of the rocker shafts 310 allows oil to rapidly diffuse through adjacent first oil passages 301 to the center of the rocker shaft 310, reducing pressure loss along a single path and ensuring uniform lubrication across all shaft sections.

[0064] The rocker arm shafts 310 are coaxially arranged along the first direction, and the first oil passages 301 are connected in sequence, so that the number of rocker arm shafts 310 can be flexibly increased or decreased according to the length of the cylinder body 100 to adapt to different engine models.

[0065] The camshaft 200 can be rotatably arranged on the cylinder body 100, and the camshaft 200 extends along the first direction. The camshaft 200 is transmission-connected to multiple rocker arm shafts 310; the embodiment of the present application does not limit the specific structure of the camshaft 200. For ordinary technicians in this field, the transmission connection between the camshaft 200 and the rocker arm shaft 310 can be achieved in various forms. The present application does not limit the manner in which the camshaft 200 is transmission-connected to the multiple rocker arm shafts 310.

[0066] The cylinder body 100 is provided with two oil inlet passages 101, which are arranged along the first direction and are respectively connected to the two outermost first oil passages 301; the cylinder body 100 is also provided with a second oil passage 102, which is connected to the first oil passage 301, and the second oil passage 102 can supply oil to the camshaft 200.

[0067] In the above embodiment, two oil inlet passages 101 are provided, each connecting to the first oil passages 301 in the two outermost rocker shafts 310. This allows oil to be injected simultaneously from both ends of the rocker shafts 310, creating a bidirectional flow path. Compared to traditional single-ended oil supply methods, the oil does not need to flow a long distance from one end to the other. This shortens the oil transfer path, reduces pressure loss along a single path, ensures uniform lubrication across all shaft sections, and improves the lubrication efficiency of the engine lubrication system. The oil inlet passages 101 independently connect the two rocker shafts 310. If one section of the oil passage is blocked, oil flow can still be maintained at the other end, improving system fault tolerance.

[0068] First oil passage 301 supplies oil directly to the sidewalls of rocker shaft 310, covering the entire circumference of rocker shaft 310 and preventing localized oil shortages. Second oil passage 102 supplies oil to camshaft 200, achieving lubrication of both rocker shaft 310 and camshaft 200, reducing system complexity while ensuring sufficient lubrication for both.

[0069] In one possible implementation, refer to Figures 1 to 8 As shown, the cylinder body 100 is provided with a plurality of mounting seats 400 , which are arranged at intervals along the first direction, that is, the plurality of mounting seats 400 are arranged at intervals along the X direction, and the mounting seats 400 are provided with mounting cavities 401 .

[0070] The rocker arm shaft 310 has a mounting portion 302, which is located within the mounting cavity 401. It should be noted that the mounting portion 302 of the rocker arm shaft 310 is integrally formed with the rocker arm shaft 310, and the rocker arm shaft 310 is mounted on the mounting seat 400 through the engagement of the mounting portion 302 with the mounting cavity 401. This application does not limit the relative relationship between the rocker arm shaft 310 and the mounting seat 400; the rocker arm shaft 310 may be fixedly mounted on the mounting seat 400 or rotatably mounted on the mounting seat 400.

[0071] A first radial oil passage 303 is defined within the mounting portion 302. A first end of the first radial oil passage 303 communicates with the first oil passage 301, and a second end of the first radial oil passage 303 communicates with the mounting cavity 401. To improve the fluidity of the engine oil, the length of the first radial oil passage 303 is the same as the diameter of the rocker arm shaft 310. The first oil passage 301 can communicate with the middle of the first radial oil passage 303. The engine oil can flow into the mounting cavity 401 through both ends of the first radial oil passage 303, thereby increasing the flow path of the engine oil and improving its fluidity.

[0072] In the above embodiment, a first radial oil passage 303 is provided in the mounting portion 302 of the rocker shaft 310 to guide the engine oil from the first oil passage 301 directly to the mounting cavity 401, thereby avoiding the disadvantage of the engine oil flowing in one direction along the entire length of the rocker shaft 310. The engine oil does not need to flow from one end of the rocker shaft 310 to the other end, but directly reaches the mounting portion 302 through the first radial oil passage 303, thereby shortening the transmission distance. The second end of the first radial oil passage 303 is connected to the mounting cavity 401, and the engine oil can preferentially flow to the friction surface where the rocker shaft 310 and the cylinder body 100 cooperate, thereby reducing ineffective flow. The resistance to the oil circulation is reduced, the pumping pressure is reduced, and thus energy consumption is reduced. Through the oil collecting function of the mounting cavity 401, the engine oil forms a stable oil pressure before entering the rocker shaft 310, thereby avoiding turbulence and foaming caused by long-distance flow, and reducing the risk of oil leakage and oxidation pollution.

[0073] Furthermore, multiple mounting seats 400 are arranged along the first direction, with the mounting portion 302 of each rocker arm shaft 310 located within the corresponding mounting cavity 401. This improves the positioning accuracy and vibration resistance of the rocker arm shaft 310. The oil within the mounting cavity 401 provides a circumferential lubrication system for the rocker arm shaft 310, covering all friction surfaces around the shaft and avoiding localized oil shortages caused by the single direction of oil flow in conventional structures.

[0074] In a possible implementation, the mounting portion 302 defines a first annular oil passage 304 , the axis of the first annular oil passage 304 coincides with the axis of the mounting portion 302 , and the first annular oil passage 304 communicates with the mounting cavity 401 and the first radial oil passage 303 .

[0075] In the above-described embodiment, the axis of the first annular oil passage 304 coincides with the axis of the mounting portion 302, forming a closed annular oil chamber, which evenly distributes the engine oil around the circumference of the mounting portion 302 of the rocker arm shaft 310. The first annular oil passage 304 covers the entire circumference of the mounting portion 302, eliminating the problem of localized oil shortages caused by the single direction of oil flow in conventional structures. In particular, it provides all-around lubrication of the friction surface between the rocker arm shaft 310 and the mounting seat 400 of the cylinder block 100. The uniform coverage of the circumferential oil film reduces the risk of dry friction caused by localized oil film deficiency during the reciprocating motion of the rocker arm shaft 310, thereby extending the service life of the rocker arm shaft 310 and the mounting seat 400. The closed structure of the first annular oil passage 304 evens out the pressure within the oil chamber, allowing the engine oil to flow more stably to the friction surface, reducing turbulence and foaming, while also reducing ineffective oil circulation within the mounting chamber 401 and improving oil utilization. In addition, by providing the first annular oil channel 304, the gap between the mounting portion 302 and the inner wall of the mounting cavity 401 is increased, so that more engine oil can be accommodated between the mounting portion 302 and the mounting cavity 401 to form a better oil film and improve the lubrication effect.

[0076] The surrounding oil film formed by the engine oil in the first annular oil passage 304 provides additional support and damping for the rocker arm shaft 310 , thereby reducing oil film rupture or component fatigue caused by vibration.

[0077] In a possible implementation manner, the cylinder body 100 is provided with a rotating seat 500 , and the rotating seat 500 is arranged on the corresponding mounting seat 400 ; the rotating seat 500 is provided with a rotating opening 501 .

[0078] The camshaft 200 is provided with a rotating portion, which is inserted into the rotating opening 501. It should be noted that the rotating portion of the camshaft 200 is integrally formed with the camshaft 200, and the camshaft 200 is provided on the rotating seat 500 through the cooperation between the rotating portion and the rotating opening 501.

[0079] A first end of the second oil passage 102 is communicated with the mounting cavity 401 , and a second end of the second oil passage 102 is communicated with the rotation port 501 .

[0080] In the above embodiment, one end of the second oil passage 102 connects to the mounting cavity 401, and the other end connects to the rotating port 501, forming a linked oil supply path from the rocker shaft 310 to the camshaft 200. After oil flows out of the sidewall of the rocker shaft 310, it flows directly to the camshaft 200 through the second oil passage 102, reducing the need for repeated oil supply. The rotating port 501 serves as an oil distribution node, delivering oil from the second oil passage 102 directly to the rotating portion of the camshaft 200. This shortens the lubrication transmission path, ensures a stable oil film on the camshaft 200 at high speeds, and reduces friction and wear.

[0081] In one possible embodiment, the mounting base 400 and the rotating base 500 are integrally formed. The rotating base 500 and the mounting base 400 are integrated, and the second oil passage 102 directly connects the mounting cavity 401 and the rotating port 501, reducing the number of external oil pipes or joints and simplifying system complexity. This short-path, highly integrated design reduces the risk of oil leakage and improves vibration resistance.

[0082] In one possible implementation, refer to Figure 3 and Figure 9 As shown, a second annular oil passage 305 and a second radial oil passage 306 are provided on the portion of the rocker arm shaft 310 where the mounting portion 302 is not provided. The axis of the second annular oil passage 305 coincides with the axis of the rocker arm shaft 310 .

[0083] A rocker arm 320 is rotatably mounted on the rocker shaft 310, and the rocker arm 320 covers the second annular oil passage 305. It should be noted that the rocker arm 320 is easily conceivable by a person skilled in the art, and the specific structure of the rocker arm 320 is not limited in the present embodiment.

[0084] The second annular oil passage 305 is connected to the first oil passage 301 through the second radial oil passage 306 . The second annular oil passage 305 is also connected to the gap between the rocker arm 320 and the rocker shaft 310 .

[0085] In the above embodiment, a second annular oil passage 305 and a second radial oil passage 306 are added in the area of ​​the rocker arm shaft 310 where the mounting portion 302 is not provided. The second annular oil passage 305 communicates with the gap between the rocker arm member 320 and the rocker arm shaft 310, and directly transports the engine oil to the contact surface between the two, thereby forming a stable oil film, reducing dry friction during the swinging process of the rocker arm member 320, and reducing the risk of wear.

[0086] The axis of the second annular oil passage 305 coincides with the axis of the rocker arm shaft 310, ensuring uniform circumferential oil distribution, avoiding the potential for uneven oil supply caused by linear oil passages and improving lubrication stability. A second radial oil passage 306 directly connects the first oil passage 301 with the second annular oil passage 305. This eliminates the need for unidirectional oil flow along the entire length of the rocker arm shaft 310, reducing pressure loss during transmission and making it particularly suitable for efficient lubrication of long rocker arm shafts 310. The rocker arm 320 covers the second annular oil passage 305, ensuring continuous oil contact throughout the rocker arm 320's swing. This reduces frictional heat accumulation caused by high-frequency reciprocating motion and prevents oil film rupture, which can lead to strain or bonding failures.

[0087] In one possible embodiment, the cylinder body 100 is provided with an oil pan 600, which is used to receive oil from the rotating port 501 and supply oil to the oil inlet passage 101. In the direction indicated by the Z arrow in the figure, the oil pan 600 is provided at the bottom of the cylinder body 100.

[0088] In the above embodiment, the oil at the rotating port 501 can overflow to the outside of the rotating port 501, and the oil overflowing from the rotating port 501 will return to the oil pan 600, ensuring the complete circulation and flow of the oil in the cylinder body 100 and reducing the waste of oil.

[0089] In one possible implementation, refer to Figure 10 As shown, the oil flowing out of the oil pan 600 passes through the oil filter 10, oil cooler 20, and oil filter 30 in sequence before entering the main oil gallery 40. The specific structures of the oil filter 10, oil cooler 20, and oil filter 30 are not limited in this embodiment of the present application. The main oil gallery 40 connects to the two oil inlet galleries 101. In addition, the oil in the main oil gallery 40 can also lubricate the piston cooling nozzles 50 and main bearings 60, and then lubricate the crankshaft 70 and connecting rod bearings 80. In order to increase the pressure in the oil circuit, an oil pump 11 can also be provided between the oil filter 10 and the oil cooler 20.

[0090] In a possible implementation, the oil inlet passage 101 has a first output port 104 and a second output port 105 that are independent of each other.

[0091] The oil inlet passage 101 is in communication with the first oil passage 301 through the first output port 104 , and the oil inlet passage 101 can supply oil to the idler gear 90 through the second output port 105 .

[0092] The second output port 105 of the oil inlet passage 101 directly supplies oil to the idler gear 90, ensuring an independent and stable oil supply to the idler gear 90, thereby avoiding the risk of oil shortage in the idler gear 90 due to pressure fluctuations or oil blockage in the main oil passage 40.

[0093] As a key component of the transmission system, the lubrication reliability of the idler 90 directly impacts engine stability. The independent output port design optimizes oil supply based on the idler 90's speed and load characteristics, reducing friction and wear at high speeds. This is particularly suited for methanol engines operating at high explosion pressures and high speeds.

[0094] In the above embodiment, the present invention does not limit the number of idler gears 90. By providing the first output port 104 and the second output port 105, the oil inlet passage 101 can simultaneously lubricate the idler gears 90, thereby improving the lubrication effect of the engine oil.

[0095] In one possible implementation, refer to Figures 1 to 3 As shown, combined with Figure 7 、 Figure 8 and Figure 11 The cylinder body 100 is provided with a mounting hole 103, the mounting hole 103 extends along the first direction, and the cylinder body 100 is provided with an end cover 700 capable of closing the mounting hole 103; the plurality of rocker arm shafts 310 include a first rocker arm shaft 310a and a second rocker arm shaft 310b.

[0096] The annular first rocker arm shaft 310a is provided with a circlip 800, and the annular first rocker arm shaft 310a is connected to the cylinder body 100 through the circlip 800; the end of the second rocker arm shaft 310b away from the annular first rocker arm shaft 310a is in contact with the end cover 700. Figure 1 and Figure 7 As shown, the cylinder body 100 has a first end and a second end. The first end of the cylinder body 100 is defined as the rear end of the cylinder body 100, the idler wheel 90 is arranged at the first end of the cylinder body 100, and the second end of the cylinder body 100 is the front end of the cylinder body 100, that is, the second end of the cylinder body 100 is closer to the front side of the vehicle. Figure 8 Schematic diagram showing the internal structure of the second end of the cylinder 100.

[0097] In the above embodiment, by providing a mounting hole 103 extending along the first direction and sealing the end with an end cap 700, the end of the second rocker shaft 310b, distal from the annular first rocker shaft 310a, directly abuts the end cap 700, forming a rigid axial support. This effectively limits axial movement of the annular first and second rocker shafts 310a, preventing axial displacement caused by engine vibration or thermal expansion. This ensures the coaxiality of the rocker shaft 310 and the mounting seat 400 of the cylinder block 100, thereby ensuring precise alignment of each first oil passage 301 and reducing the risk of oil leakage. The annular first rocker shaft 310a is connected to the cylinder block 100 via a retaining spring 800. The elastic properties of the retaining spring 800 absorb vibration energy during engine operation, compensate for minor displacement caused by thermal expansion, and maintain the axial positioning of the rocker shaft 310. This flexible connection complements the rigid support provided by the end cap 700, balancing the requirements of structural rigidity and adaptability. In conventional structures, if the rocker arm shaft 310 shifts due to vibration or assembly errors, it can cause misalignment of the oil channel interface, leading to oil leakage or flow obstruction. The coordinated fixation of the end cap 700 and the retaining spring 800 ensures the coaxiality of the multiple rocker arm shafts 310 and the precision of the oil channel connection. This significantly improves the reliability of the sequential connection of the first oil channel 301 along the first direction and reduces oil loss due to seal failure.

[0098] Furthermore, as a separate component, the end cap 700 can be quickly removed for replacement of the second rocker arm shaft 310b or maintenance without disassembling the entire cylinder block 100. The standardized design of the retaining spring 800 also facilitates quick adjustment or replacement of the annular first rocker arm shaft 310a, reducing maintenance complexity and costs. This simple structure makes maintenance easier and more cost-effective than traditional mounting methods using a cap and bolts.

[0099] In one possible embodiment, there are multiple rocker arm structures 300, arranged along a second direction. The oil inlet passage 101 connects the first oil passages 301 of the multiple rocker arm structures 300. The first direction is perpendicular to the second direction. The second direction is indicated by the Y arrow in the figure. Arranging the multiple rocker arm structures 300 along the second direction accommodates the compact layout of a multi-cylinder engine, forming a grid-like oil circuit network. In a specific implementation, the number of rocker arm structures 300 can be two, arranged along the second direction. The oil inlet passage 101 can extend through the multiple rocker arm structures 300 along the second direction, avoiding the lateral space occupied by traditional linear oil circuits and improving the structural compactness of the cylinder block 100. By setting the number of rocker arm structures 300 to two, the multiple rocker arm shafts 310 include a first rocker arm shaft 310a and a second rocker arm shaft 310b. This arrangement allows for the use of four rocker arm shafts 310, each with a similar assembly configuration, reducing component design and development costs.

[0100] Optionally, the oil inlet passage 101 can be connected to the first oil passages 301 of multiple rocker arm structures 300 through branches to achieve modular oil supply, so as to allow the engine lubrication system provided in the embodiment of the present application to be flexibly expanded to more cylinders or rocker arm structures 300.

[0101] Furthermore, in one possible embodiment, the present application provides an engine comprising a main body and the aforementioned engine lubrication system, wherein the main body is connected to the engine lubrication system. The specific structure of the engine lubrication system has been described above and will not be repeated here. An engine equipped with the aforementioned engine lubrication system can improve the lubrication effect of the engine lubrication system.

[0102] The implementation principle of an engine lubrication system and an engine in an embodiment of the present application is as follows: the engine lubrication system includes a cylinder block 100, a camshaft 200 and a rocker arm structure 300. The rocker arm structure 300 includes multiple rocker arm shafts 310, which are coaxially arranged in the cylinder body 100 in sequence along the first direction. A first oil passage 301 is provided in the rocker arm shaft 310, and the first oil passage 301 can supply oil to the side wall of the rocker arm shaft 310. The first oil passages 301 of the multiple rocker arm shafts 310 are connected in sequence along the first direction; the camshaft 200 is rotatably arranged in the cylinder body 100, and the camshaft 200 extends in the first direction. The camshaft 200 is transmission-connected to the multiple rocker arm shafts 310; the cylinder body 100 is provided with two oil inlet passages 101, and the two oil inlet passages 101 are arranged in the first direction. The two oil inlet passages 101 are respectively connected to the two outermost first oil passages 301; the cylinder body 100 is also provided with a second oil passage 102, which is connected to the first oil passage 301, and the second oil passage 102 can supply oil to the camshaft 200. By providing two oil inlet passages 101, each connected to the first oil passages 301 in the two outermost rocker shafts 310, oil can be simultaneously injected from both ends of the rocker shaft 310, creating a bidirectional flow path. Compared to traditional single-end oil supply methods, oil does not need to flow a long distance from one end to the other, shortening the oil transfer path and reducing pressure loss along a single path. This ensures uniform lubrication across all shaft sections and improves the lubrication efficiency of the engine's lubrication system.

[0103] Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein.

[0104] The embodiments of this application are intended to cover any variations, uses, or adaptations of the present application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered merely as exemplary, and the true scope and spirit of this application are indicated by the claims.

[0105] It should be understood that the present application is not limited to the exact structure described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. An engine lubrication system, characterized in that: Including cylinder block, camshaft and rocker arm structure; The rocker arm structure includes a plurality of rocker arm shafts; the plurality of rocker arm shafts are coaxially arranged in sequence along a first direction on the cylinder body; a first oil passage is provided in the rocker arm shaft, the first oil passage can supply oil to the side wall of the rocker arm shaft, and the first oil passages of the plurality of rocker arm shafts are connected in sequence along the first direction; The camshaft is rotatably disposed on the cylinder body, the camshaft extends along the first direction, and the camshaft is drivingly connected to the plurality of rocker arm shafts; The cylinder body is provided with two oil inlet passages, the two oil inlet passages are arranged along the first direction, and the two oil inlet passages are respectively connected to the two outermost first oil passages; The cylinder block is further provided with a second oil passage, which is communicated with the first oil passage and can supply oil to the camshaft.

2. The engine lubrication system according to claim 1, characterized in that: The cylinder body is provided with a plurality of mounting seats, the plurality of mounting seats are arranged along a first direction, and the mounting seats are provided with mounting cavities; The rocker arm shaft has a mounting portion, and the mounting portion is located in the mounting cavity; A first radial oil passage is defined in the mounting portion, a first end of the first radial oil passage is communicated with the first oil passage, and a second end of the first radial oil passage is communicated with the mounting cavity.

3. The engine lubrication system according to claim 2, characterized in that: The mounting portion defines a first annular oil passage, the axis of the first annular oil passage coincides with the axis of the mounting portion, and the first annular oil passage communicates with the mounting cavity and the first radial oil passage.

4. The engine lubrication system according to claim 3, characterized in that: The cylinder body is provided with a rotating seat, and the rotating seat is arranged on the corresponding mounting seat; the rotating seat is provided with a rotating port; The camshaft is provided with a rotating portion, and the rotating portion is inserted into the rotating opening; A first end of the second oil passage is communicated with the installation cavity, and a second end of the second oil passage is communicated with the rotation port.

5. The engine lubrication system according to claim 3, characterized in that: A second annular oil passage and a second radial oil passage are formed on a portion of the rocker arm shaft where the mounting portion is not provided, and an axis of the second annular oil passage coincides with an axis of the rocker arm shaft; A rocker arm member is rotatably provided on the rocker arm shaft, and the rocker arm member covers the second annular oil passage; The second annular oil passage is connected to the first oil passage through the second radial oil passage. The second annular oil passage is also connected to the gap between the rocker arm member and the rocker arm shaft.

6. The engine lubrication system according to claim 4, characterized in that: The cylinder body is provided with an oil pan, and the oil pan is used to receive the oil from the rotating port, and the oil pan can supply oil to the oil inlet passage.

7. The engine lubrication system according to claim 1, characterized in that: The oil inlet passage has a first output port and a second output port which are independent of each other; The oil inlet passage is connected to the first oil passage through the first output port, and the oil inlet passage can supply oil to the idler gear through the second output port.

8. The engine lubrication system according to any one of claims 1 to 7, characterized in that: The cylinder body is provided with a mounting hole, the mounting hole extending along the first direction, and the cylinder body is provided with an end cover capable of closing the mounting hole; The plurality of rocker shafts include a first rocker shaft and a second rocker shaft; The first rocker arm shaft is provided with a retaining spring, and the first rocker arm shaft is connected to the cylinder body through the retaining spring; the end of the second rocker arm shaft away from the first rocker arm shaft abuts against the end cover.

9. The engine lubrication system according to any one of claims 1 to 7, characterized in that: There are multiple rocker arm structures, and the multiple rocker arm structures are arranged along the second direction. The oil inlet passage is connected to the first oil passages of the multiple rocker arm structures; The first direction is perpendicular to the second direction.

10. An engine, characterized in that: The invention comprises a body and an engine lubrication system according to any one of claims 1 to 9, wherein the body is connected to the engine lubrication system.

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