Engine accessory gear train and vehicle

Abstract

The invention provides an engine accessory gear train and a vehicle, and belongs to the technical field of vehicles. The engine accessory gear train comprises a water pump belt wheel, a torsion damper belt wheel, a generator belt wheel, an air compressor belt wheel and a poly V-belt. The water pump belt wheel, the torsion damper belt wheel, the generator belt wheel and the air compressor belt wheel are located on the same side of the engine, make contact with the poly V-belt and are in transmission connection through the poly V-belt. Due to the fact that the water pump belt wheel, the torsion damper belt wheel, the generator belt wheel and the air compressor belt wheel are located on the same side of the engine, the engine accessory gear train is compact in structure and small in occupied space. And moreover, the length of the poly V-belt can be short, abnormal sound caused by excessive shaking of the poly V-belt is avoided, and oil consumption can be reduced. In addition, an idle wheel does not need to be arranged in the engine accessory gear train, so that the number of parts in the engine accessory gear train is reduced, and the weight of the engine accessory gear train is reduced.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle technology, and in particular to an engine accessory wheel system and a vehicle. Background Technology

[0002] The engine accessory gear train is the transmission system in the engine used to drive various auxiliary devices (such as water pumps, generators, air conditioning compressors, etc.). Its design directly affects the engine's efficiency, weight reduction, and reliability.

[0003] In related technologies, the engine accessory pulley system includes a water pump pulley, a torsional damper pulley, a generator pulley, an air compressor pulley, and a multi-ribbed belt. The water pump pulley, torsional damper pulley, generator pulley, and air compressor pulley are connected by a multi-ribbed belt.

[0004] However, the engine accessory pulley system in related technologies is relatively large, resulting in a large space occupation. Furthermore, it leads to excessively long multi-ribbed belt segments, resulting in an overly long belt, high cost, and a tendency for excessive vibration, abnormal noise, and reliability issues. Summary of the Invention

[0005] This disclosure provides an engine accessory wheel system and a vehicle that can solve the technical problems existing in the related art. The technical solution of the engine accessory wheel system and the vehicle is as follows.

[0006] In a first aspect, this disclosure provides an engine accessory pulley system, which includes a water pump pulley, a torsional damper pulley, a generator pulley, an air compressor pulley, and a multi-ribbed belt; The water pump pulley, the torsional damper pulley, the generator pulley, and the air compressor pulley are located on the same side of the engine and are all in contact with the multi-ribbed belt, and are connected by the multi-ribbed belt drive.

[0007] In one possible implementation, the water pump pulley, the torsional damper pulley, the generator pulley, and the air compressor pulley are all located on the intake side of the engine.

[0008] In one possible implementation, the front side of the multi-wedge belt contacts the torsional damper pulley, the generator pulley, and the air compressor pulley; The water pump pulley is located between the generator pulley and the air compressor pulley, and the back side of the multi-ribbed belt is in contact with the water pump pulley.

[0009] In one possible implementation, the engine accessory pulley system further includes a tensioner pulley; The tensioner pulley and the generator pulley are located on the same side of the engine. The tensioner pulley is located between the generator pulley and the torsional damper pulley, and the tensioner pulley and the multi-ribbed belt are in contact on the side opposite to the water pump pulley.

[0010] In one possible implementation, let the length of the multi-wedge belt between the torsional damper pulley and the tensioner pulley be L1, and the length of the multi-wedge belt between the tensioner pulley and the generator pulley be L2, then L2 > L1.

[0011] In one possible implementation, L2 / L1 ≥ 1.1.

[0012] In one possible implementation, let the length of the multi-wedge belt between the water pump pulley and the generator pulley be L3, and the length of the multi-wedge belt (5) between the water pump pulley and the air compressor pulley be L4, then L4 > L3.

[0013] In one possible implementation, L4 / L3 ≥ 1.1.

[0014] In one possible implementation, let the length of the multi-wedge belt between the water pump pulley and the air compressor pulley be L4, and the length of the multi-wedge belt between the air compressor pulley and the torsional damper pulley be L5, then L5 / L4≥1.1, or L4 / L5≥1.1.

[0015] In a second aspect, this disclosure provides a vehicle, characterized in that the vehicle includes the engine accessory wheel system as described in any one of the first aspects.

[0016] The technical solution provided in this disclosure includes at least the following beneficial effects: This disclosure provides an engine accessory pulley system. Because the water pump pulley, torsional damper pulley, generator pulley, and air compressor pulley are located on the same side of the engine, the engine accessory pulley system has a compact structure and occupies less space. Furthermore, it allows for a shorter multi-ribbed belt, reducing costs and preventing excessive vibration and abnormal noise. It also reduces the frictional work of the multi-ribbed belt, thus improving overall vehicle fuel consumption to some extent.

[0017] Furthermore, since the water pump pulley, torsional damper pulley, generator pulley, and air compressor pulley are located on the same side of the engine, there is no need to arrange idler pulleys in the engine accessory gear train, thereby reducing the number of parts in the engine accessory gear train and reducing the weight of the engine accessory gear train.

[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. In the drawings: Figure 1 This is a schematic diagram of the structure of an engine accessory gear train according to an embodiment of the present disclosure; Figure 2 This is a schematic diagram of the structure of an engine accessory gear train according to an embodiment of the present disclosure; Figure 3 This is a schematic diagram of the structure of an engine accessory wheel system shown in an embodiment of this disclosure.

[0020] Legend: 1. Water pump pulley; 2. Torsional damper pulley; 3. Generator pulley; 4. Air compressor pulley; 5. Multi-wedge belt; 6. Tensioner pulley; 100. Engine; 200. Timing cover; 300. First bolt; 400, Second Bolt; 500, the third bolt.

[0021] The accompanying drawings have illustrated specific embodiments of this disclosure, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this disclosure to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings.

[0023] The terminology used in the embodiments of this disclosure is for illustrative purposes only and is not intended to limit the disclosure. Unless otherwise defined, the technical or scientific terms used herein should be understood in their ordinary sense by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” “third,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “a” or “one,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising,” “including,” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected,” “linked,” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0024] It is further understood that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the two components; they can refer to a direct connection between two components without the presence of other components, or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0025] The engine accessory gear train is the transmission system within the engine used to drive various auxiliary devices (such as water pumps, generators, and air conditioning compressors). Its design directly affects the engine's efficiency, lightweight design, and reliability. With the rapid development of passenger vehicles and more families owning private cars, although new energy vehicles are developing rapidly, some customers still prefer pure gasoline-powered cars. However, national regulations on emissions and fuel consumption for passenger vehicles are becoming increasingly stringent. Therefore, many passenger cars today are small-displacement vehicles. Furthermore, to achieve better fuel economy, there is a strong demand for lightweight and compact design of automotive components, especially engines. The front compartment of the engine has extremely limited space, resulting in very limited space for the generator, a crucial peripheral component of the engine. Therefore, a more compact engine accessory gear train is more advantageous for matching and applying different engine components.

[0026] In related technologies, the engine accessory pulley system includes a water pump pulley, a torsional damper pulley, a generator pulley, an air compressor pulley, and a multi-ribbed belt. The water pump pulley, torsional damper pulley, generator pulley, and air compressor pulley are connected by multi-ribbed belts. The engine accessory pulley system drives the engine water pump pulley, mechanical compressor pulley, and 12V generator pulley through one or more (2-3) multi-ribbed belts. To ensure effective driving and stable operation of the multi-ribbed belts, a tensioner is used to provide tension, necessitating the use of one or more idler pulleys to improve the layout of the accessory pulley system. Furthermore, the water pump pulley, torsional damper pulley, generator pulley, and air compressor pulley are distributed on the intake and exhaust sides of the engine.

[0027] However, the engine accessory pulley system in related technologies is relatively large, resulting in a large space occupation. Furthermore, it leads to excessively long multi-ribbed belt segments, resulting in an overly long belt, high cost, and a tendency for excessive vibration, abnormal noise, and reliability issues.

[0028] In view of the above-mentioned technical problems, this disclosure provides an engine accessory wheel system, such as... Figure 1 As shown, the engine accessory pulley system includes a water pump pulley 1, a torsional damper pulley 2, a generator pulley 3, an air compressor pulley 4, and a multi-ribbed belt 5. The water pump pulley 1, torsional damper pulley 2, generator pulley 3, and air compressor pulley 4 are located on the same side of the engine 100 and are all in contact with the multi-ribbed belt 5, and are connected by transmission through the multi-ribbed belt 5.

[0029] Among them, the multi-wedge belt 5 can also be called a transmission belt. The multi-wedge belt refers to an annular rubber transmission belt with a flat belt as the base and longitudinal trapezoidal wedges arranged at equal intervals on the inner surface. Its working surface is the side of the wedge.

[0030] The water pump pulley 1 is connected to the water pump. When the engine 100 is working, the crankshaft of the engine 100 drives the water pump pulley to rotate, which in turn drives the water pump impeller to rotate. The crankshaft of the engine 100 drives the generator pulley 3 to rotate, which in turn drives the generator to work. The crankshaft of the engine 100 drives the air compressor pulley 4 to rotate, which in turn drives the air compressor to work. When the engine 100 is working, it drives the torsional damper to work, which in turn drives the torsional damper pulley 2. The torsional damper pulley 2 drives the water pump pulley 1, the generator pulley 3, and the air compressor pulley 4 to work.

[0031] The technical solution provided in this disclosure allows for a more compact engine accessory pulley system structure and smaller footprint because the water pump pulley 1, torsional damper pulley 2, generator pulley 3, and air compressor pulley 4 are located on the same side of the engine 100. Furthermore, the shorter length of the multi-ribbed belt 5 reduces costs and prevents excessive vibration and abnormal noise. The shorter belt length also avoids the risk of slapping noise and detachment caused by excessive vibration. Additionally, it reduces the frictional work of the multi-ribbed belt 5, thus improving overall vehicle fuel consumption to some extent.

[0032] Furthermore, since the water pump pulley 1, torsional damper pulley 2, generator pulley 3, and air compressor pulley 4 are located on the same side of the engine 100, there is no need to arrange idler pulleys in the engine accessory gear train, thereby reducing the number of parts in the engine accessory gear train and reducing the weight of the engine accessory gear train.

[0033] It should be noted that if other pulleys are arranged in the engine accessory pulley system, all pulleys can still be arranged on the same side of the engine 100, thereby reducing the volume of the engine accessory pulley system in sequence.

[0034] In related technologies, water pump pulleys, torsional damper pulleys, generator pulleys, air compressor pulleys, and multi-ribbed belts are distributed on the intake and exhaust sides of the engine. Typically, the water pump pulley is located on the exhaust side of the engine. Understandably, since the water pump pulley serves as the power input end of the water pump, the water pump itself is also positioned on the exhaust side. However, because the engine exhaust side emits high-temperature exhaust gases after combustion, the exhaust temperature is relatively high. Placing the water pump on the exhaust side would result in a higher water temperature within the pump, thus affecting its cooling performance.

[0035] Therefore, in some examples, the water pump pulley 1, the torsional damper pulley 2, the generator pulley 3, and the air compressor pulley 4 are all located on the intake side of the engine 100. Correspondingly, the water pump is also arranged on the intake side of the engine 100. It is understood that the intake side of the engine 100 receives fresh air at room temperature or low temperature. When the vehicle is in motion, the air entering through the front air intake grille can be used to ensure the cooling of the engine 100, water pump, air compressor, generator, and multi-ribbed belt 5, thereby improving the cooling performance of the water pump and increasing the operating efficiency of the generator and air compressor.

[0036] Of course, in other examples, the water pump pulley 1, the torsional damper pulley 2, the generator pulley 3, and the air compressor pulley 4 can all be arranged on the exhaust side of the engine 100, and this disclosure does not specifically limit this.

[0037] In some examples, such as Figure 1As shown, the front of the multi-wedge belt 5 contacts the torsional damper pulley 2, the generator pulley 3, and the air compressor pulley 4. The water pump pulley 1 is located between the generator pulley 3 and the air compressor pulley 4, and the back of the multi-wedge belt 5 contacts the water pump pulley 1. The front of the multi-wedge belt 5 has a trapezoidal wedge, and the back is a smooth surface.

[0038] This increases the wrap angle of the multi-ribbed belt 5 at the water pump pulley 1, generator pulley 3, and air compressor pulley 4, thereby increasing the contact area between the multi-ribbed belt 5 and the water pump pulley 1, generator pulley 3, and air compressor pulley 4. This, in turn, increases the friction and transmission capacity between the multi-ribbed belt 5 and the water pump pulley 1, generator pulley 3, and air compressor pulley 4, preventing the multi-ribbed belt 5 from slipping during engine accessory pulley system operation, thus ensuring the stable operation of the engine accessory pulley system.

[0039] In some examples, such as Figure 1 As shown, the engine accessory pulley system also includes a tensioner pulley 6. The tensioner pulley 6 and the generator pulley 3 are located on the same side of the engine 100. The tensioner pulley 6 is located between the generator pulley 3 and the torsional damper pulley 2, and the tensioner pulley 6 and the multi-ribbed belt 5 are in contact on the side opposite to the water pump pulley 1.

[0040] This increases the wrap angle of the multi-ribbed belt 5 at the generator pulley 3 and the torsional damper pulley 2, thereby increasing the contact area between the multi-ribbed belt 5 and the generator pulley 3 and torsional damper pulley 2. This, in turn, improves the friction and transmission capacity of the multi-ribbed belt 5 and the generator pulley 3 and torsional damper pulley 2, preventing slippage of the multi-ribbed belt 5 during engine accessory pulley system operation. Furthermore, the tensioner pulley 6 prevents the multi-ribbed belt 5 from loosening, ensuring it maintains appropriate tension. The tensioner pulley 6 also reduces vibration of the multi-ribbed belt 5 during transmission, thus lowering the noise generated during operation.

[0041] In some examples, such as Figure 1 As shown, let the length of the multi-wedge belt 5 between the torsional damper pulley 2 and the tensioner pulley 6 be L1, and the length of the multi-wedge belt 5 between the tensioner pulley 6 and the generator pulley 3 be L2, then L2 > L1.

[0042] The length of the multi-wedge belt 5 between the torsional damper pulley 2 and the tensioner pulley 6 can also be referred to as the span of the multi-wedge belt 5 in the entry section of the tensioner pulley 6, specifically the distance between the last contact point between the multi-wedge belt 5 and the torsional damper pulley 2 and the first contact point between the multi-wedge belt 5 and the tensioner pulley 6. Similarly, the length of the multi-wedge belt 5 between the tensioner pulley 6 and the generator pulley 3 can also be referred to as the span of the multi-wedge belt 5 in the exit section of the tensioner pulley 6, specifically the distance between the last contact point between the multi-wedge belt 5 and the tensioner pulley 6 and the first contact point between the multi-wedge belt 5 and the generator pulley 3.

[0043] As mentioned earlier, the contact surface between the multi-ribbed belt 5 and the tensioner pulley 6 is a smooth plane without wedge groove guidance, making it prone to lateral deviation. Setting L2 > L1, meaning the entry span is smaller than the exit span, results in a shorter free section for the multi-ribbed belt 5 before entering the tensioner pulley 6. This provides greater lateral stiffness and reduces swaying, allowing it to enter the tensioner pulley 6 with a more stable posture and a more accurate center plane, thus reducing the risk of deviation. When the multi-ribbed belt 5 exits the tensioner pulley 6, it has completed its reverse bending and gradually resumes straight motion. At this point, the bending stress is being unloaded, and the tension on the output side of the tensioner pulley 6 is typically low, allowing for a larger exit span without significantly affecting lifespan or stability. Furthermore, setting L2 > L1 also mitigates the risk of alignment noise.

[0044] In some examples, L2 / L1 ≥ 1.1. This allows the span of the multi-wedge belt 5 at the entry and exit sections of the tensioner pulley 6 to differ significantly, resulting in a large difference in the natural frequencies of the entry and exit sections, thus avoiding resonance noise between the entry and exit sections.

[0045] In some examples, such as Figure 1 As shown, let the length of the multi-wedge belt 5 between the water pump pulley 1 and the generator pulley 3 be L3, and the length of the multi-wedge belt 5 between the water pump pulley 1 and the air compressor pulley 4 be L4, then L4 > L3.

[0046] The length of the multi-ribbed belt 5 between the water pump pulley 1 and the generator pulley 3 can also be referred to as the span of the multi-ribbed belt 5 in the entry section of the water pump pulley 1, specifically the distance between the last contact point of the multi-ribbed belt 5 with the generator pulley 3 and the first contact point of the multi-ribbed belt 5 with the water pump pulley 1. Similarly, the length of the multi-ribbed belt 5 between the water pump pulley 1 and the air compressor pulley 4 can also be referred to as the span of the multi-ribbed belt 5 in the exit section of the water pump pulley 1, specifically the distance between the last contact point of the multi-ribbed belt 5 with the water pump pulley 1 and the first contact point of the multi-ribbed belt 5 with the air compressor pulley 4.

[0047] As mentioned earlier, the contact surface between the multi-ribbed belt 5 and the pump pulley 1 is a smooth plane without wedge groove guidance, making it prone to lateral deviation. Setting L4 > L3, meaning the entry span is smaller than the exit span, results in a shorter free section for the multi-ribbed belt 5 before entering the pump pulley 1. This provides greater lateral stiffness and reduces swaying, allowing it to enter the pump pulley 1 with a more stable posture and a more accurate center plane, thus reducing the risk of deviation. When the multi-ribbed belt 5 leaves the pump pulley 1, it has already completed its reverse bending and gradually resumes straight motion. At this point, the bending stress is being unloaded, and the tension on the output side of the pump pulley 1 is typically low (slack side), allowing for a larger exit span without significantly affecting lifespan or stability. Furthermore, setting L4 > L3 also mitigates alignment noise risks.

[0048] In some examples, L4 / L3 ≥ 1.1. This allows for a significant difference in the span between the entry and exit sections of the multi-wedge belt 5 at the tensioner pulley 6, resulting in a larger difference in the natural frequencies of the entry and exit sections, thus preventing resonance noise between them.

[0049] In some examples, such as Figure 1 As shown, let the length of the multi-wedge belt 5 between the water pump pulley 1 and the air compressor pulley 4 be L4, and the length of the multi-wedge belt 5 between the air compressor pulley 4 and the torsional damper pulley 2 be L5. Then L5 / L4≥1.1, or L4 / L5≥1.1.

[0050] The length of the multi-ribbed belt 5 between the water pump pulley 1 and the air compressor pulley 4 can also be referred to as the span of the multi-ribbed belt 5 in the entry section of the air compressor pulley 4. Specifically, it refers to the distance between the last contact point between the multi-ribbed belt 5 and the water pump pulley 1 and the first contact point between the multi-ribbed belt 5 and the air compressor pulley 4. Similarly, the length of the multi-ribbed belt 5 between the air compressor pulley 4 and the torsional damper pulley 2 can also be referred to as the span of the multi-ribbed belt 5 in the exit section of the air compressor pulley 4. Specifically, it refers to the distance between the last contact point between the multi-ribbed belt 5 and the air compressor pulley 4 and the first contact point between the multi-ribbed belt 5 and the torsional damper pulley 2.

[0051] Setting L5 / L4 ≥ 1.1, or L4 / L5 ≥ 1.1, means that the span of the multi-wedge belt 5 at the entry section and the exit section of the air compressor pulley 4 differs by at least 10%. This ensures a significant difference in the natural frequencies of the multi-wedge belt 5 at the entry and exit sections of the air compressor pulley 4, thereby preventing resonance noise between the entry and exit sections.

[0052] In some examples, the span of the multi-wedge belt 5 at the entry and exit sections of the torsional damper pulley 2 differs by at least 10%. That is, L5 / L1 ≥ 1.1, or L1 / L5 ≥ 1. This results in a significant difference in the natural frequencies of the multi-wedge belt 5 at the entry and exit sections of the torsional damper pulley 2, thus preventing resonance noise between the entry and exit sections.

[0053] It should be noted that if there are other pulleys in the engine accessory pulley system that are in contact with the multi-ribbed belt 5, the span of the multi-ribbed belt 5 at the pulley entry section and the span at the exit section will differ by at least 10%, so that the natural frequencies of the entry section and the exit section will differ significantly, thereby avoiding resonance noise in the entry section and the exit section.

[0054] In some examples, such as Figure 1 and Figure 2 As shown, the generator pulley 3 is located at the top of the air intake side of the engine 100, the air compressor pulley 4 is located at the bottom of the air intake side of the engine 100, and the water pump pulley 1 is located between the generator pulley 3 and the air compressor pulley 4. The torsional damper pulley 2 is located to the left of the air compressor pulley 4, and the tensioner pulley 6 is located between the torsional damper pulley 2 and the generator pulley 3.

[0055] The present invention does not limit the specific arrangement of the various components on the exhaust side of the engine 100. Technicians can arrange them according to the actual space of the vehicle.

[0056] In some instances, such as Figure 2 and Figure 3 As shown, the tensioner is fixed to the timing cover 200 by two first bolts 300, and the generator is fixed to the cylinder head and cylinder block of the engine 100 by two second bolts 400. The water pump is fixed to the cylinder block of the engine 100 by four third bolts 500. The air compressor is fixed to the cylinder block and oil pan cover of the engine 100 by four fourth bolts 600. This direct fixing of each component to the engine 100 improves the modal characteristics of the components, thus avoiding resonance noise at high engine speeds and mitigating reliability issues caused by resonance noise. It also saves on the brackets used to fix the components, making the engine accessory gear train lighter and smaller. Furthermore, it reduces the frictional work of the engine accessory gear train, improving overall vehicle fuel consumption to some extent.

[0057] The technical solution provided in this disclosure allows for a more compact engine accessory pulley system structure and a smaller overall size, as all pulleys are arranged on the intake side of the engine 100. The short length of the multi-ribbed belt 5 also avoids excessive vibration, which can lead to slapping noises and the risk of detachment. Furthermore, arranging the pulleys on the intake side of the engine 100 facilitates cooling of the water pump, air compressor, and multi-ribbed belt, improving water pump cooling performance and generator / air compressor efficiency, while also preventing overheating of the multi-ribbed belt 5. Due to the compact structure of the engine accessory pulley system, only one multi-ribbed belt 5 is needed, avoiding slippage noises, misalignment noises, resonance noises from the multi-ribbed belt strands, and excessive vibration noises. Moreover, the engine accessory pulley system does not use brackets to fix the pulleys, reducing the number of components and preventing resonance noises at high engine speeds when the components are in low-modality states, thus mitigating resonance noise and reliability issues caused by resonance.

[0058] This disclosure also provides a vehicle, characterized in that the vehicle includes the aforementioned engine accessory wheel system.

[0059] This disclosure does not specifically limit the type of vehicle, such as cars, buses, trucks, sport utility vehicles (SUVs), etc. The vehicle can be a gasoline vehicle or a hybrid electric vehicle (HEV), such as range-extended or plug-in hybrid.

[0060] The technical solution provided in this disclosure provides a compact engine accessory wheel system in the vehicle, thereby reducing the space occupied by the engine accessory wheel system in the vehicle, which is beneficial for the arrangement of other components in the vehicle and for the miniaturization design of the vehicle. In addition, since the engine accessory wheel system does not require the use of idler gears, it is lighter in weight, which is beneficial for the lightweighting of the vehicle.

[0061] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this disclosure should be included within the protection scope of this disclosure. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary technical means in the art not disclosed in this disclosure. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the scope of claims.

Claims

1. An engine accessory train, characterized by, The engine accessory pulley system includes a water pump pulley (1), a torsional damper pulley (2), a generator pulley (3), an air compressor pulley (4), and a multi-ribbed belt (5). The water pump pulley (1), the torsional damper pulley (2), the generator pulley (3) and the air compressor pulley (4) are located on the same side of the engine (100) and are all in contact with the multi-ribbed belt (5) and are connected by transmission through the multi-ribbed belt (5).

2. The engine accessory train of claim 1, wherein, The water pump pulley (1), the torsional damper pulley (2), the generator pulley (3), and the air compressor pulley (4) are all located on the intake side of the engine (100).

3. The engine accessory train of claim 1, wherein, The front of the multi-wedge belt (5) contacts the torsional damper pulley (2), the generator pulley (3), and the air compressor pulley (4); The water pump pulley (1) is located between the generator pulley (3) and the air compressor pulley (4), and the back side of the multi-wedge belt (5) is in contact with the water pump pulley (1).

4. The engine accessory train of claim 1, wherein, The engine accessory gear train also includes a tensioner pulley (6); The tensioner pulley (6) and the generator pulley (3) are located on the same side of the engine (100), the tensioner pulley (6) is located between the generator pulley (3) and the torsional damper pulley (2), and the tensioner pulley (6) and the multi-ribbed belt (5) are in contact on the side opposite to the water pump pulley (1).

5. The engine accessory train of claim 4, wherein, Let the length of the multi-wedge belt (5) between the torsional damper pulley (2) and the tensioner pulley (6) be L1, and the length of the multi-wedge belt (5) between the tensioner pulley (6) and the generator pulley (3) be L2, then L2 > L1.

6. The engine accessory gear train according to claim 5, characterized in that, L2 / L1≥1.

1.

7. The engine accessory gear train according to claim 1, characterized in that, Let the length of the multi-wedge belt (5) between the water pump pulley (1) and the generator pulley (3) be L3, and the length of the multi-wedge belt (5) between the water pump pulley (1) and the air compressor pulley (4) be L4, then L4 > L3.

8. The engine accessory gear train according to claim 7, characterized in that, L4 / L3≥1.

1.

9. The engine accessory gear train according to claim 1, characterized in that, Let the length of the multi-wedge belt (5) between the water pump pulley (1) and the air compressor pulley (4) be L4, and the length of the multi-wedge belt (5) between the air compressor pulley (4) and the torsional damper pulley (2) be L5, then L5 / L4 ≥ 1.1, or L4 / L5≥1.

1.

10. A vehicle, characterized in that, The vehicle includes the engine accessory wheel system as described in any one of claims 1-9.

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