Engine timing system, engine and vehicle
By adding a first and second auxiliary oil passage to the engine cylinder block, the problem of poor lubrication of the timing chain and tensioner in motorcycle engines was solved, thereby improving the engine's durability and comfort.
Patent Information
- Application Number
- CN202520411385.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-03-10
AI Technical Summary
The existing arrangement of timing chains and mechanical tensioners in motorcycle engines has poor lubrication, which leads to a decrease in engine durability and reliability. Uneven contact between the chain and the tensioner plate causes increased abnormal noise. Internal components of the tensioner may jam or break due to fatigue load overload, affecting engine durability and noise level.
A first and a second oil passage are added to the engine cylinder block. The first oil passage sprays oil to the contact point between the timing chain and the tensioner for lubrication, while the second oil passage directly lubricates the inside of the tensioner. The buffering and heat dissipation capacity of the lubricating oil is used to reduce impact load, increase the fatigue life of the coil spring, and optimize the overall reliability and comfort of the engine.
It effectively alleviates vibration and noise from the timing chain and tensioner, extends the fatigue life of the tensioner, improves engine durability and comfort, and reduces the failure rate.
Smart Images
Figure CN223578004U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of engine technology, and in particular to an engine timing system, an engine, and a vehicle. Background Technology
[0002] Current motorcycle engine timing chain and mechanical tensioner arrangements have the following characteristics: To achieve a smaller installation space and better vibration damping, the engine tensioner is generally located at the lower end of the cylinder head or the upper end of the cylinder block to better support the tensioner plate, minimize chain extension distance, and reduce vibration and noise. Simultaneously, the timing chain and mechanical tensioner utilize splash lubrication and internal oil mist lubrication, achieving a rigid connection between the chain and tensioner for vibration and noise reduction based on limited lubrication. However, the current arrangement of engine timing chains and mechanical tensioners on the market still has the following drawbacks:
[0003] 1. Wear on the inner side of the chain and scratches on the contact surface of the tensioner plate: Because the drive chain is splash lubricated, insufficient lubrication occurs during the engine start-up phase, resulting in fatigue wear due to dry friction with parts such as the tensioner plate and timing driven gear. After long-term use, uneven contact between the chain and the tensioner plate causes increased abnormal noise in the chain cavity, affecting the engine's durability, smoothness, and noise level.
[0004] 2. Tensioner fatigue noise or damage: Since most mechanical tensioners are located near the cylinder head, they rely primarily on splash lubrication to lubricate the contact points and internal components such as the spiral springs and bushings. This arrangement, due to long-term and significant vibration and impact, especially with increased vibration in the chain cavity later on, can cause the spiral springs inside the tensioner to become stuck or break due to fatigue overload. Increased vibration of the support rod can lead to wear of the limit bushings, resulting in excessive clearance and causing abnormal noise or failure of the tensioner.
[0005] Therefore, there are still shortcomings and deficiencies in the existing technology. How to provide an engine timing system, engine and vehicle that can improve the lubrication method and ensure the durability and reliability of the engine is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0006] The purpose of this invention is to provide an engine timing system that solves the technical problem that the current arrangement of engine timing chains and mechanical tensioners on the market results in poor lubrication and reduced engine durability and reliability.
[0007] To achieve the above objectives, this utility model provides an engine timing system, comprising:
[0008] Timing chain, installed on the engine;
[0009] A tensioner and a tension plate are installed in an engine, the tensioner is used to support the tension plate to adjust the tightness of the timing chain through the tension plate;
[0010] A first sub-oil passage is arranged in the cylinder block of the engine and communicates with the main oil passage of the cylinder block of the engine, the oil outlet of the first sub-oil passage is directed to the contact position of the timing chain and the tension plate;
[0011] A second sub-oil passage is arranged in the cylinder block of the engine and communicates with the main oil passage of the cylinder block and the inside of the tensioner, the second sub-oil passage is used to spray lubricating oil into the inside of the tensioner for lubrication.
[0012] Preferably, the cylinder block of the engine is further provided with a pressurized oil passage, the pressurized oil passage respectively communicates with the second sub-oil passage and the inside of the tensioner, the size of the pressurized oil passage is smaller than the size of the second sub-oil passage.
[0013] Preferably, the tensioner comprises:
[0014] A housing and a top cover, the top cover is used to contact and abut with the tension plate to provide tension force to the tension plate;
[0015] A support rod arranged in the inside of the housing is used to provide tension force to the tension plate through the top cover;
[0016] A spiral spring arranged in the inside of the housing is used to provide continuous tension force to the support rod;
[0017] A bushing arranged in the inside of the housing.
[0018] Preferably, the top cover is located between the housing and the tension plate, the top cover is movably arranged in the housing.
[0019] Preferably, the side of the top cover used to contact the tension plate is provided with an oil outlet hole, the oil outlet hole communicates with the inside of the tensioner, so that the lubricating oil flows from the inside of the tensioner to the contact position of the top cover and the tension plate through the oil outlet hole.
[0020] Preferably, the inside of the tensioner is provided with an internal oil passage, the lubricating oil flows to the oil outlet hole through the internal oil passage.
[0021] Preferably, the first sub-oil passage forms an oil spray groove on the upper end surface of the cylinder block of the engine, the oil spray groove is directed to the contact position of the timing chain and the tension plate.
[0022] Preferably, the tensioner is installed in the engine through a tensioner seat, the tensioner seat is provided with a limiting groove, the second sub-oil passage is located below the limiting groove, the lubricating oil enters the inside of the tensioner through the limiting groove from the second sub-oil passage.
[0023] The utility model also provides an engine, including the engine timing system of any prior art scheme provided.
[0024] The utility model also provides a vehicle, including the engine of prior art scheme provided.
[0025] Relative to above-mentioned background art, the engine timing system provided by the utility model, the cylinder block main oil way of engine has added two oil ways, through first vice oil way can spray lubricating oil to the contact position of timing chain and tensioning plate, alleviate the wear and tear of timing chain, tensioning plate contact surface pull mark, through second vice oil way can lubricate inside directly, utilize the buffer and heat dissipation capacity of lubricating oil and reduce the impact load of timing chain transmission, thereby effectively alleviate the vibration abnormal sound of engine timing chain and tensioning plate, increase the fatigue life of tensioner, optimize the overall reliability and comfort of engine.
[0026] The vehicle and the engine can produce the same technical effects as the engine timing system. BRIEF DESCRIPTION OF DRAWINGS
[0027] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in embodiment or prior art description, obviously, the drawings in the following description only are the embodiments of the utility model, for ordinary skilled person in the art, under the premise of not paying creative labor, still can obtain other drawings according to the provided drawings.
[0028] Figure 1 It is the schematic diagram of engine provided by the utility model embodiment;
[0029] Figure 2 It is the partial structure schematic diagram of engine provided by the utility model embodiment;
[0030] Figure 3 It is the schematic diagram of tensioner, tensioning plate, timing chain in engine provided by the utility model embodiment;
[0031] Figure 4 It is the schematic diagram of engine cylinder block main oil way and first vice oil way in engine provided by the utility model embodiment;
[0032] Figure 5 It is the sectional structure schematic diagram of tensioner provided by the utility model embodiment.
[0033] Figures 1 to 510, timing chain; 20, tensioner; 21, housing; 22, top cover; 221, oil outlet hole; 23, support rod; 24, spiral spring; 25, bushing; 30, tension plate; 40, cylinder block main oil passage; 41, first sub oil passage; 42, second sub oil passage; 43, pressurized oil passage; 100, engine. DETAILED DESCRIPTION
[0034] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0035] In order for those skilled in the art to better understand the utility model solutions, the utility model will be further described in detail below with reference to the drawings and specific embodiments.
[0036] The utility model provides a kind of engine timing system, and two oil passages are added to the cylinder block main oil passage 40 of engine 100, and the contact position of timing chain 10 and tension plate 30 can be sprayed with lubricating oil by first sub oil passage 41, to alleviate the wear of timing chain 10, tension plate 30 contact surface pull mark, the interior of tensioner 20 can be directly lubricated by second sub oil passage 42 and pressurized oil passage 43, effectively solve the problem of fatigue abnormal sound or damage of tensioner 20.
[0037] Please refer to Figures 1 to 5 The engine timing system provided by the utility model includes timing chain 10, tensioner 20, tension plate 30, first sub oil passage 41 and second sub oil passage 42.
[0038] Timing chain 10 is installed on engine 100, mainly used to connect the crankshaft of engine 100 and cylinder head timing wheel, to ensure that the intake and exhaust are synchronized, to ensure the efficient coordination of engine 100 working process.
[0039] Tensioner 20 and tension plate 30 are installed on engine 100, and tensioner 20 is used to support tension plate 30 to adjust the tightness of timing chain 10 through tension plate 30.
[0040] First sub oil passage 41 is arranged in the cylinder block of engine 100, and first sub oil passage 41 is communicated with the cylinder block main oil passage 40 of engine 100, and the oil outlet of first sub oil passage 41 is directed to the contact position of timing chain 10 and tension plate 30.
[0041] The second auxiliary oil passage 42 is located in the cylinder block of the engine 100. The second auxiliary oil passage 42 is connected to the main oil passage 40 of the cylinder block of the engine 100 and the inside of the tensioner 20. The second auxiliary oil passage 42 is used to spray lubricating oil into the inside of the tensioner 20 for lubrication.
[0042] During operation, lubricating oil from the main oil passage 40 of the engine block 100 enters the first auxiliary oil passage 41 and is sprayed through the oil outlet of the first auxiliary oil passage 41 onto the contact point between the timing chain 10 and the tensioner 30. This improves the lubrication effect between the timing chain 10 and the tensioner 30. Compared to splash lubrication, this reduces fatigue wear caused by dry friction of parts and solves the problem of uneven contact between the timing chain 10 and the tensioner 30 after long-term use, which causes increased abnormal noise in the chain cavity and affects the durability, smoothness, and noise level of the engine 100. At the same time, another stream of lubricating oil enters the second auxiliary oil passage 42 and is sprayed into the interior of the tensioner 20. This lubricates the internal components of the tensioner 20, such as the coil spring 24, bushing 25, and support rod 23, solving the problem of fatigue noise or damage to the tensioner 20, improving the durability and reliability of the engine 100, and reducing the failure rate.
[0043] The timing chain 10 can be directly lubricated through the first auxiliary oil passage 41, alleviating wear on the inner side of the timing chain 10 and scratches on the contact surface of the tensioner 30, and reducing dry friction wear during startup. The tensioner 20 can be directly lubricated through the second auxiliary oil passage 42, utilizing the buffering and heat dissipation capabilities of the lubricating oil to reduce the impact load transmitted by the timing chain 10 and increase the fatigue life of the coil spring 24. The lubricating oil also reduces the impact force between the support rod 23 and the bushing 25 and reduces wear on the bushing 25. This configuration effectively alleviates vibration and abnormal noise between the timing chain 10 and the tensioner 30 of the engine 100, increases the fatigue life of the tensioner 20, and optimizes the overall reliability and comfort of the engine 100.
[0044] Please refer to this as well. Figures 1 to 5 The cylinder block of the engine 100 is also provided with a pressurized oil passage 43, which is connected to the second auxiliary oil passage 42 and the tensioner 20 respectively. The size of the pressurized oil passage 43 is smaller than the size of the second auxiliary oil passage 42.
[0045] By setting up a pressurized oil passage 43, the lubricating oil in the main oil passage 40 of the cylinder block of the engine 100 can enter the tensioner 20 through the second auxiliary oil passage 42 and the pressurized oil passage 43 in sequence. Since the size of the pressurized oil passage 43 is smaller than the size of the second auxiliary oil passage 42, the lubricating oil is pressurized after entering the pressurized oil passage 43 from the second auxiliary oil passage 42. By reducing the flow area and increasing the oil pressure, the lubricating oil is sprayed into the mechanical tensioner 20 to lubricate the coil spring 24, bushing 25, support rod 23 and other components inside the tensioner 20.
[0046] Please refer to this as well. Figures 1 to 5The utility model provides an engine timing system, the tensioner 20 includes the shell 21, the top cap 22, the support rod 23, the vortex spring 24 and the bushing 25.
[0047] The top cap 22 is located at one side of the shell 21, and the top cap 22 is used to contact and abut against the tensioning plate 30 to provide tensioning force to the tensioning plate 30; the support rod 23 is arranged inside the shell 21 and is used to provide tensioning force to the tensioning plate 30 through the top cap 22; the vortex spring 24 is arranged inside the shell 21 and is used to provide continuous tension to the support rod 23; and the bushing 25 is arranged inside the shell 21.
[0048] Please refer to Figures 1 to 5 The top cap 22 is located between the shell 21 and the tensioning plate 30, and the top cap 22 is movably arranged in the shell 21.
[0049] Under the action of the vortex spring 24 and the support rod 23, the support rod 23 contacts the top cap 22, thereby driving the top cap 22 to move, so that the top cap 22 contacts and abuts against the tensioning plate 30, and the tensioning plate 30 is used to adjust the tightness of the timing chain 10.
[0050] Please refer to Figures 1 to 5 One side of the top cap 22, which is used to contact the tensioning plate 30, is provided with an oil outlet hole 221, the oil outlet hole 221 is in communication with the inside of the tensioner 20, so that the lubricating oil flows from the inside of the tensioner 20 to the contact position of the top cap 22 and the tensioning plate 30 through the oil outlet hole 221.
[0051] Preferably, the inside of the tensioner 20 is provided with an internal oil channel, and the lubricating oil is guided to the oil outlet hole 221 through the internal oil channel.
[0052] Since the engine 100 is a vertically inclined cylinder head, the lubricating oil is guided from the oil outlet hole 221 to the contact position of the top cap 22 and the tensioning plate 30 of the tensioner 20 through the internal oil channel of the tensioner 20, the impact load borne by the vortex spring 24 inside the tensioner 20 is reduced by increasing the oil film, and the fatigue life of the vortex spring 24 is improved, and the purpose of reducing the chain cavity vibration noise of the engine 100 is achieved.
[0053] Preferably, the first auxiliary oil channel 41 forms an oil injection groove on the upper end surface of the cylinder block of the engine 100, and the oil injection groove is directed to the contact position of the timing chain 10 and the tensioning plate 30.
[0054] The oil injection groove is arranged on the upper end surface of the cylinder block of the engine 100, so that the machining is facilitated, the processing cost is reduced, and the quality risk is easily controlled.
[0055] Preferably, the tensioner 20 is installed on the engine 100 through a tensioner seat, the tensioner seat is provided with a limiting groove, the second auxiliary oil channel 42 is located below the limiting groove, and the lubricating oil enters the inside of the tensioner 20 from the second auxiliary oil channel 42 through the limiting groove.
[0056] The engine timing system provided by this utility model adds two oil passages to the main oil passage 40 of the cylinder block of the engine 100. The first auxiliary oil passage 41 can spray lubricating oil to the contact position between the timing chain 10 and the tensioner 30, reducing wear on the inner side of the timing chain 10 and scratches on the contact surface of the tensioner 30, and alleviating dry friction wear during the starting phase. The second auxiliary oil passage 42 and the pressurized oil passage 43 can directly lubricate the inside of the tensioner 20, using the buffering and heat dissipation capacity of the lubricating oil to reduce the impact load transmitted by the timing chain 10 and increase the fatigue life of the coil spring 24. The lubricating oil reduces the impact force between the support rod 23 and the bushing 25 and reduces the wear of the bushing 25. The lubricating oil is guided from the oil outlet 221 to the contact position between the top cover 22 of the tensioner 20 and the tensioner 30 through the built-in oil passage of the tensioner 20. By increasing the oil film, the impact load on the coil spring 24 inside the tensioner 20 is reduced, thereby improving the fatigue life of the coil spring 24 and reducing the vibration noise of the engine 100 chain cavity.
[0057] This configuration effectively reduces vibration and noise between the timing chain 10 and the tensioner 30 of the engine 100, increases the fatigue life of the tensioner 20, and optimizes the overall reliability and comfort of the engine 100.
[0058] In addition to the engine timing systems disclosed in the above embodiments, this utility model also provides an engine 100 including the above-described engine timing systems.
[0059] In addition to the engine 100 disclosed in the above embodiments, the present invention also provides a vehicle including the engine 100.
[0060] Since the vehicle and engine 100 include the aforementioned engine timing system, they are able to produce the same technical effects as the engine timing system.
[0061] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.
[0062] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.
Claims
1. An engine timing system characterized by, The engine timing system comprises: a timing chain (10) installed on an engine (100); a tensioner (20) and a tensioner plate (30) installed on the engine (100), the tensioner (20) being used to support the tensioner plate (30) to adjust the tightness of the timing chain (10) through the tensioner plate (30); a first sub-oil passage (41) provided on a cylinder block of the engine (100) and communicating with a main oil passage (40) of the cylinder block of the engine (100), an oil outlet of the first sub-oil passage (41) facing a contact position of the timing chain (10) and the tensioner plate (30); a second sub-oil passage (42) provided on the cylinder block of the engine (100) and communicating with the main oil passage (40) and an inside of the tensioner (20), the second sub-oil passage (42) being used to spray lubricating oil into the inside of the tensioner (20) for lubrication.
2. The engine timing system of claim 1, wherein, The cylinder block of the engine (100) is further provided with a pressurized oil passage (43) respectively communicating with the second sub-oil passage (42) and the inside of the tensioner (20), the pressurized oil passage (43) having a size smaller than that of the second sub-oil passage (42).
3. The engine timing system of claim 1, wherein, The tensioner (20) comprises: a housing (21) and a top cover (22) used to contact and abut against the tensioner plate (30) to provide a tensioning force to the tensioner plate (30); a support rod (23) provided inside the housing (21) and used to provide the tensioning force to the tensioner plate (30) through the top cover (22); a spiral spring (24) provided inside the housing (21) and used to provide a continuous tension to the support rod (23); a bushing (25) provided inside the housing (21).
4. The engine timing system of claim 3, wherein, The top cover (22) is located between the housing (21) and the tensioner plate (30), and is movably provided in the housing (21).
5. The engine timing system of claim 4, wherein, One side of the top cover (22) used to contact the tensioner plate (30) is provided with an oil outlet hole (221) communicating with the inside of the tensioner (20) to make the lubricating oil flow from the inside of the tensioner (20) to the contact position of the top cover (22) and the tensioner plate (30) through the oil outlet hole (221).
6. The engine timing system of claim 5, wherein, The inside of the tensioner (20) is provided with an internal oil passage through which the lubricating oil is guided to the oil outlet hole (221).
7. The engine timing system of claim 1, wherein The first sub-oil passage (41) forms an oil spraying groove on an upper end surface of the cylinder block of the engine (100), the oil spraying groove facing the contact position of the timing chain (10) and the tensioner plate (30).
8. The engine timing system of claim 1, wherein, The tensioner (20) is installed on the engine (100) through a tensioner seat, the tensioner seat is provided with a limiting groove, the second sub-oil passage (42) is located below the limiting groove, and the lubricating oil enters the inside of the tensioner (20) through the limiting groove from the second sub-oil passage (42).
9. An engine (100) characterized by, The engine timing system comprises any one of the engines according to claims 1 to 8.
10. A vehicle characterized by comprising: The engine (100) comprises the engine timing system according to claim 9.