Engine with good power performance

Abstract

The utility model belongs to the technical field of engines, and provides an engine with good power performance, an oil storage chamber cover is positioned on one side of an engine main body, a lubricating oil chamber is formed on the side part of the engine main body, and an oil pan is arranged at the bottom of the engine main body and receives lubricating oil flowing down from the inner wall of the engine main body; a high-pressure oil pump and an oil scavenger pump are arranged in the engine body, an input port of the high-pressure oil pump and an input port of the oil scavenger pump are both communicated with an inner cavity of the oil pan, an output port of the high-pressure oil pump is connected with a high-pressure runner on the engine body, an output port of the oil scavenger pump is communicated with the lubricating oil chamber, and all valves of the engine body are connected with hydraulic compensation assemblies. The problem that when the engine main body inclines, the high-pressure oil pump cannot pump lubricating oil can be avoided, it is guaranteed that all parts of the engine main body can be fully lubricated and cooled under various road conditions, and then the performance of the engine is improved.

Description

Technical Field

[0001] An engine with good power performance, belonging to the field of engine technology. Background Art

[0002] Snowmobiles typically use reciprocating piston engines, which include four-stroke and two-stroke engines. Heavier snowmobiles tend to use four-stroke engines, while lighter recreational vehicles may use two-stroke engines.

[0003] Existing engines typically have the following problems during operation: 1) The lubricating oil in existing engines is usually stored in the oil pan at the bottom of the engine. Engines used in all-terrain vehicles or snowmobiles often encounter poor driving performance and frequently encounter road conditions such as climbing hills. When tilted, the high-pressure oil pump may not be able to draw lubricating oil. Secondly, due to the limited area at the bottom of the engine, the heat dissipation area of ​​the lubricating oil is small, resulting in poor heat dissipation and reduced cooling effect of the lubricating oil on various components. 2) During the power stroke, the engine block must be tightly sealed to ensure engine power. This requires the valves to completely seal the intake and exhaust ports. During the intake or exhaust stroke, the valves must fully open the intake or exhaust ports to quickly achieve the intake and exhaust actions. To avoid mutual interference, the valves must close and open smoothly. In existing engines, a certain clearance is required between the valve and the camshaft when the valve separates from the camshaft cam to avoid problems such as valve not closing properly or valve and piston interfering with each other. Due to the existence of the clearance, the engine will have a lot of noise when it is running. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an engine with good lubrication and heat dissipation, and to eliminate the problem of excessive noise caused by the gap between the valve and the camshaft.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an engine valve train structure, including a camshaft, valves, valve springs and hydraulic compensation components. Intake ports and exhaust ports are respectively provided on both sides of the cylinder head. A valve is installed in each intake port and exhaust port. A hydraulic compensation component is slidably installed on the upper part of each intake port and exhaust port. Each valve is slidably connected to the corresponding hydraulic compensation component, and a valve spring is provided between each valve and the hydraulic compensation component.

[0006] Furthermore, the hydraulic compensation assembly includes a hydraulic cylinder and a support plate. The bottom of the hydraulic cylinder is open, and the support plate is slidably disposed inside the hydraulic cylinder. The support plate and the hydraulic cylinder are sealed together. The valve stem is fixedly connected to the support plate. The valve spring is disposed between the support plate and the cylinder head. The side of the hydraulic cylinder is provided with a liquid inlet hole, which is set higher than the support plate.

[0007] Furthermore, an annular platform is provided around the center of the inner wall of the hydraulic cylinder, and a support plate is provided on the lower side of the annular platform.

[0008] Furthermore, an annular groove is provided around the outer wall of the hydraulic cylinder, with the annular groove and the annular platform facing each other, and the inlet hole is located between the annular groove and the annular platform.

[0009] Furthermore, a flexible sealing assembly is provided between the valve and the cylinder head.

[0010] Furthermore, the flexible sealing assembly includes a sealing sleeve, which is fitted over the valve. The bottom of the sealing sleeve is fixedly connected to the cylinder head, and the top of the sealing sleeve is detachably connected to the valve stem. The sealing sleeve is sealed to both the cylinder head and the valve.

[0011] Furthermore, the inner walls of the cylinder head's intake and exhaust ports are provided with guide sleeves, and the valve stems are detachably connected to the guide sleeves.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The high-performance engine's oil reservoir is located on one side of the engine block, which increases the heat dissipation area and ensures rapid cooling of the lubricating oil. This allows the lubricating oil to fully lubricate and cool all parts, resulting in excellent cooling performance. Secondly, because the oil reservoir is located on one side, the oil pan only collects the lubricating oil that falls from the engine block and circulates it through a high-pressure oil pump and a return oil pump. This avoids the problem of the high-pressure oil pump being unable to draw lubricating oil when the engine block is tilted, ensuring that all parts of the engine block receive adequate lubrication and cooling under various road conditions, thereby improving engine performance. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a 3D schematic diagram of the oil pan;

[0016] Figure 3 This is a schematic diagram showing the installation locations of the engine's high-pressure oil pump and return oil pump;

[0017] Figure 4 This is a schematic diagram of the front sectional view of the cylinder head;

[0018] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.

[0019] In the diagram: 1. Engine body; 2. Oil reservoir cover; 3. Dipstick; 4. Oil inlet; 5. Receiving groove; 6. Lubricating oil groove; 7. Oil filter; 8. First return oil groove; 9. Second return oil groove; 10. Second oil passage; 11. First oil passage; 12. Connecting hole; 13. High-pressure oil pump; 14. Return oil pump; 15. Cylinder head; 16. Air inlet; 17. Valve; 18. Guide sleeve; 19. Hydraulic cylinder; 1901. Annular platform; 1902. Annular groove; 20. Valve spring; 21. Support plate; 22. Sealing sleeve. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments. However, those skilled in the art should understand that the detailed description given here with reference to the accompanying drawings is for better explanation. The structure of the present invention may exceed the limited embodiments described herein. Some equivalent alternatives or common means will not be described in detail here, but they still fall within the protection scope of this application.

[0021] Figures 1-5 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figures 1-5 The present invention will be further described below.

[0022] See attached document Figures 1-5An engine with good power performance includes an engine body 1, a hydraulic compensation assembly, an oil pan, and an oil reservoir cover 2. The oil reservoir cover 2 is located on one side of the engine body 1 and forms a lubricating oil chamber on the side of the engine body 1. The oil pan is located at the bottom of the engine body 1 and receives the lubricating oil flowing down the inner wall of the engine body 1. A high-pressure oil pump 13 and a return oil pump 14 are installed inside the engine body 1. The inlet of the high-pressure oil pump 13 and the inlet of the return oil pump 14 are both connected to the inner cavity of the oil pan. The outlet of the high-pressure oil pump 13 is connected to the high-pressure flow channel on the engine body 1, and the outlet of the return oil pump 14 is connected to the lubricating oil chamber. Each valve 17 of the engine body 1 is connected to the hydraulic compensation assembly. The oil reservoir of this high-performance engine is located on one side of the engine block 1, which increases the heat dissipation area of ​​the oil reservoir and ensures rapid heat dissipation of the lubricating oil. This ensures that the lubricating oil can fully lubricate and cool all parts to be lubricated, resulting in good cooling effect. Secondly, since the oil reservoir of the engine block 1 is located on one side, the oil pan is only used to collect the lubricating oil falling from the engine block 1 and circulates it through the high-pressure oil pump 13 and the return oil pump 14. This avoids the problem that the high-pressure oil pump 13 cannot draw lubricating oil when the engine block 1 is tilted, ensuring that all parts of the engine block 1 can receive sufficient lubrication and cooling under various road conditions. The hydraulic compensation component can realize hydraulic compensation. The valve 17 is in constant contact with the camshaft through the hydraulic compensation component, thereby avoiding noise caused by the gap between the valve 17 and the camshaft. Moreover, since the hydraulic compensation component can be compressed, and the compression only pushes out the hydraulic oil without rigid damage, it can avoid the problem of valve 17 not closing properly due to mutual interference between valve 17 and piston.

[0023] Specifically, an oil reservoir cover 2 is provided on one side of the engine body 1, and an oil dipstick 3 is provided on one side of the oil reservoir cover 2. The oil dipstick 3 is used to measure the amount of lubricating oil in the oil reservoir. In this embodiment, three cylinders are arranged side by side on the engine body 1.

[0024] The oil pan is detachably installed at the bottom of the engine body 1, and a receiving part for receiving lubricating oil is provided on the oil pan.

[0025] Specifically, the receiving part includes an oil return channel, a lubrication channel and a receiving groove 5 provided on the top of the oil pan, wherein the oil return channel includes a first oil passage 11 and a second oil passage 10.

[0026] The receiving groove 5 is located in the middle of the oil pan. The receiving groove 5 corresponds one-to-one with the cylinder block of the engine body 1 and is set directly below the corresponding cylinder block, so as to collect the lubricating oil flowing down from the cylinder block. In this embodiment, the engine body 1 is provided with three cylinder blocks, so there are three receiving grooves 5 arranged side by side.

[0027] The first oil passage 11 is located on one side of the three receiving grooves 5. A guide section is provided on the first oil passage 11. A connecting hole 12 is provided on the side of each receiving groove 5 near the first oil passage 11. Each guide section communicates with the corresponding connecting hole 12. A first return oil groove 8 is provided at one end of the first oil passage 11. The receiving grooves 5 receive the lubricating oil flowing down from the cylinder block. The lubricating oil flows through the connecting hole 12 and the guide section into the first oil passage 11, and then flows through the first oil passage 11 into the first return oil groove 8.

[0028] The second oil passage 10 is arranged side by side with the first oil passage 11. The first oil passage 11 is located between the second oil passage 10 and each receiving groove 5. The second oil passage 10 is provided with a second oil return groove 9 at one end near the first oil return groove 8. The other end of the second oil passage 10 bends towards the receiving groove 5 and communicates with the oil inlet 4 provided on one side of the oil pan. The second oil passage 10 receives the lubricating oil flowing down from each lubrication part. At the same time, the oil inlet 4 can receive the lubricating oil flowing back from the outside and flow back to the second oil return groove 9 through the second oil passage 10.

[0029] The lubrication channel is located on the side of the receiving groove 5 away from the first oil passage 11. Several extensions are provided on the lubrication channel, and an extension is provided between each pair of adjacent receiving grooves 5. A lubricating oil groove 6 is provided at the end of the first oil passage 11 near the first return oil groove 8. The lubricating oil passage receives the lubricating oil flowing down from the cylinder block of the engine body 1 and allows it to flow back to the lubricating oil groove 6 through the lubricating oil passage.

[0030] Both the high-pressure oil pump 13 and the return oil pump 14 are located inside the engine block 1. The inlet of the high-pressure oil pump 13 is connected to the lubricating oil tank 6, and the inlet of the return oil pump 14 is connected to both the first return oil tank 8 and the second return oil tank 9. Oil filters 7 are installed between the inlet of the high-pressure oil pump 13 and the lubricating oil tank 6, between the inlet of the return oil pump 14 and the first return oil tank 8, and between the inlet of the return oil pump 14 and the second return oil tank 9. These filters can filter the lubricating oil returned to the lubricating oil chamber and the lubricating oil sent into the high-pressure flow channel to prevent impurities in the lubricating oil from damaging the engine block 1.

[0031] The output port of the high-pressure oil pump 13 is connected to the high-pressure flow channel, and delivers lubricating oil to various parts of the engine body 1 that need lubrication. Delivering lubricating oil to various lubrication points of the engine body 1 via the high-pressure flow channel is existing technology, and its specific structure and working principle will not be elaborated here.

[0032] In this embodiment, the engine body 1 is an exhaust gas turbocharged engine, and the oil outlet of the exhaust gas turbocharger is connected to the oil inlet 4, so that the lubricating oil that lubricates the exhaust gas turbocharger can flow back into the second oil passage 10.

[0033] Each side of the cylinder head 15 has at least one intake port 16 and at least one exhaust port. Camshafts are symmetrically mounted on both sides of the cylinder head 15, and each camshaft corresponds to a valve 17 on the corresponding side. The two camshafts are connected to the crankshaft via a timing belt.

[0034] The structure and working principle of the air intake 16 are the same as those of the exhaust port. In this embodiment, the structure of the air intake 16 is used as an example to illustrate the specific structure and working principle of the air distribution structure.

[0035] An intake passage connected to the intake port 16 is provided on one side of the cylinder head 15, and the intake passage is located on one side of the hydraulic compensation assembly. A guide sleeve 18 is provided on the cylinder head 15, located above the intake passage, and the guide sleeve 18 is aligned with the intake port 16. The stem of the valve 17 is slidably connected to the guide sleeve 18. The guide sleeve 18 can guide the valve 17 to ensure that the valve 17 is aligned with the intake port 16, thereby ensuring reliable sealing of the intake port 16.

[0036] A mounting cavity is also provided on the top of the cylinder head 15. The mounting cavity is directly opposite the air inlet 16. The mounting cavity is located on one side of the air intake channel, and the guide sleeve 18 is located between the mounting cavity and the air inlet 16.

[0037] The valve train structure of this engine also includes a sealing sleeve 22, which is fitted on the outside of the valve stem of the valve 17. The sealing sleeve 22 is located at the bottom of the mounting cavity, and the bottom of the sealing sleeve 22 is fixed and sealed to the bottom of the mounting cavity. The top of the sealing sleeve 22 is detachably connected to the valve stem of the valve 17, and the top of the sealing sleeve 22 is sealed to the valve 17. The sealing sleeve 22 is made of rubber to avoid hindering the operation of the valve 17.

[0038] In this embodiment, the sealing sleeve 22 is connected to the valve 17 via a snap ring, which facilitates the disassembly of the valve 17.

[0039] The hydraulic compensation assembly includes a hydraulic cylinder 19 and a support plate 21. The hydraulic cylinder 19 is a cylinder with an open bottom and a closed top. An annular platform 1901 is provided in the middle of the inner wall of the hydraulic cylinder 19, and an annular groove 1902 is provided in the outer wall of the hydraulic cylinder 19, with the annular groove 1902 facing the annular platform 1901. A fluid inlet is provided on the side of the hydraulic cylinder 19, located between the annular platform 1901 and the annular groove 1902. The support plate 21 is slidably disposed inside the hydraulic cylinder 19, and the support plate 21 is sealed to the hydraulic cylinder 19. The support plate 21 is located below the annular platform 1901, so that the annular platform 1901 can push the support plate 21 downward and limit the support plate 21, ensuring that the fluid inlet is always located above the support plate 21. The lubricating oil entering the hydraulic cylinder 19 can cause relative movement between the support plate 21 and the hydraulic cylinder 19. The lower part of the hydraulic cylinder 19 can slide into the mounting cavity.

[0040] The valve spring 20 is sleeved on the outside of the valve stem of the valve 17 and is located on the lower side of the support plate 21. The valve spring 20 is in a compressed state, and one end of the valve spring 20 is supported on the cylinder head 15.

[0041] In this embodiment, the inlet port is connected to the high-pressure oil pump 13 on the cylinder head 15, thereby enabling the delivery of lubricating oil to the inside of the hydraulic cylinder 19. When the valve 17 completely closes the air inlet 16, the hydraulic cylinder 19 moves upward relative to the support plate 21 under the action of the lubricating oil, thus ensuring that the hydraulic cylinder 19 is always in contact with the camshaft. When the air inlet 16 is opened, the camshaft squeezes the hydraulic cylinder 19, and the hydraulic cylinder 19 pushes the valve 17 downward through the hydraulic oil and valve spring 20, thereby opening the air inlet 16. During this process, the lubricating oil in the hydraulic cylinder 19 will be discharged from the inlet port as needed, thus adapting to the movement of the valve 17. This ensures that the hydraulic cylinder 19 and the camshaft remain in contact at all times, while also allowing relative movement between the valve 17 and the hydraulic cylinder 19, thereby avoiding mutual interference between the valve 17 and the piston and eliminating the noise problem caused by the gap between the valve 17 and the camshaft.

[0042] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. An engine with good power performance, characterized in that: The engine body (1), hydraulic compensation components, oil pan, and oil reservoir cover (2) are included. The oil reservoir cover (2) is located on one side of the engine body (1) and forms a lubricating oil chamber on the side of the engine body (1). The oil pan is located at the bottom of the engine body (1) and receives the lubricating oil flowing down the inner wall of the engine body (1). The engine body (1) is equipped with a high-pressure oil pump (13) and a return oil pump (14). The inlet of the high-pressure oil pump (13) and the inlet of the return oil pump (14) are both connected to the inner cavity of the oil pan. The outlet of the high-pressure oil pump (13) is connected to the high-pressure flow channel on the engine body (1). The outlet of the return oil pump (14) is connected to the lubricating oil chamber. Each valve (17) of the engine body (1) is connected to the hydraulic compensation components.

2. The engine with good power performance according to claim 1, characterized in that: It also includes a dipstick (3), which is located on the same side of the engine body (1) as the oil reservoir cover (2).

3. The engine with good power performance according to claim 1, characterized in that: The engine body (1) has three cylinders arranged side by side.

4. The engine with good power performance according to claim 1, characterized in that: An oil return channel and a lubricating oil channel are provided on the upper side of the oil pan. The oil return channel and the lubricating oil channel are set independently. The inlet of the oil return pump (14) is connected to the oil return channel, and the inlet of the high-pressure oil pump (13) is connected to the lubricating channel.

5. The engine with good power performance according to claim 1, characterized in that: The hydraulic compensation assembly includes a hydraulic cylinder (19) and a support plate (21). The bottom of the hydraulic cylinder (19) is open. The support plate (21) is slidably disposed inside the hydraulic cylinder (19). The support plate (21) and the hydraulic cylinder (19) are sealed together. The rod of the valve (17) is fixedly connected to the support plate (21). The valve spring (20) of the engine body (1) is disposed between the support plate (21) and the cylinder head (15). The side of the hydraulic cylinder (19) is provided with a liquid inlet hole, which is set higher than the support plate (21).

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