Motorcycle air cleaner structure with changeable intake passage

Abstract

The utility model discloses a motorcycle air filter structure that can change air inlet channel, characterized in that: including air filter, the bottom of air filter is connected with two high -speed intake pipes and two low -speed intake pipes, two high -speed intake pipes are arranged to the front, two low -speed intake pipes are arranged to the back, high -speed intake pipe is connected to the head of motorcycle through extension pipe, and the air inlet end of extension pipe is provided with high -speed intake valve, and the valve door board initial state closes the import of extension pipe. Can effectively solve the disadvantage of the low -speed torque difference of the high -speed change motorcycle when low -speed driving. Guarantee the torque performance when low -speed driving, improve the low -speed power of vehicle, and the smoothness of control. Also solve the problem of the big low -speed noise of engine, improve the NVH feeling of vehicle, improve the product competitiveness. The practicability and the universality of structure are stronger, and be applicable to all vehicle models.

Description

Technical Field

[0001] This utility model relates to the field of motorcycle air filter structure, specifically to a motorcycle air filter structure with an adjustable air intake passage. Background Technology

[0002] The air filter is a core component of a motorcycle's intake and exhaust system, significantly impacting the vehicle's torque and power output. Most sportbike motorcycles on the market today utilize high-revving engines in pursuit of maximum speed, with some commercially available models exceeding 13,000 RPM. Since the air filter supplies air to the engine, its intake volume needs to increase with engine speed. The air filter's impact on engine performance stems from providing sufficient air for combustion; more air results in better combustion and improved engine performance. Simultaneously, the air filter needs good airflow smoothness. With sufficient intake volume, smoother airflow leads to better torque and power, with torque being the most noticeable improvement. It also addresses the issue of low-speed torque loss in most engines, resulting in better handling and a smoother power delivery.

[0003] Currently, air filters on the market designed for vehicles with high-revving engines typically feature large-diameter intake ports, resulting in a large air intake volume. This compromises the vehicle's low-speed performance. When the vehicle is traveling at low speeds, the engine speed is low, and the air filter, due to its large intake port, provides far more air than the vehicle needs at low speeds. This leads to less internal airflow resistance and turbulence. This uneven airflow reduces torque, decreases acceleration performance, and makes acceleration less linear. When driving at low speeds, the driver tends to increase the engine speed to compensate for the reduced torque. This puts the engine in a higher RPM state, increasing driving noise, fuel consumption, and shortening engine life. Therefore, most high-revving sport bikes are unsuitable for commuting and city driving, not only due to excessive noise disturbing neighbors but also because the feeling of high-speed engine operation at low speeds is poor, and overall vehicle vibration is increased. Summary of the Invention

[0004] To address the shortcomings of the existing technology, this utility model provides a motorcycle air filter structure that can change the air intake channel, which reasonably matches the air intake volume, making the motorcycle's air intake smooth, powerful, and with low noise.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A motorcycle air filter structure with an adjustable air intake channel is characterized by: including an air filter, the bottom of which is connected to two high-speed air intake pipes and two low-speed air intake pipes, wherein the two high-speed air intake pipes are arranged forward and the two low-speed air intake pipes are arranged rearward. The high-speed air intake pipes are connected to the front of the motorcycle through extension pipes. A high-speed air intake valve is provided at the air intake end of the extension pipe. The high-speed air intake valve includes a valve door plate, a valve shaft, a valve spring, and a locking nut. The valve door plate is fixed to the valve shaft by a pin. The valve spring is sleeved on the valve shaft, and the other end of the valve spring is limited on the valve shaft. The locking nut is threadedly disposed at the end of the valve shaft and presses the valve spring. Both ends of the valve shaft are rotatably connected to the side wall of the extension pipe. The other end of the valve spring is limited on the extension pipe, so that the valve door plate initially closes the inlet of the extension pipe.

[0007] Furthermore, the extension tube has grooves on its two side walls, and bushings are embedded in the grooves, with the valve shaft rotating in conjunction with the bushings.

[0008] Furthermore, the diameter of the high-speed intake pipe is larger than that of the low-speed intake pipe.

[0009] Furthermore, the low-speed air intake pipe is concealed within the motorcycle body.

[0010] Furthermore, a valve motor is installed on the extension tube, and the output shaft of the valve motor is connected to the valve shaft via a coupling for actively controlling the opening size of the valve plate.

[0011] The beneficial effects of this invention include: effectively solving the disadvantage of poor low-speed torque in high-revving motorcycles. It ensures torque performance at low speeds, improving the vehicle's low-speed power, handling, and smoothness. It also solves the problem of high engine noise at low speeds, improving the vehicle's NVH (noise, vibration, and harshness) experience and enhancing product competitiveness. The structure is highly practical and versatile, suitable for all vehicle models, with the most significant improvement effect on high-revving motorcycles, especially sport bikes currently on the market with 3-cylinder and 4-cylinder engines, which generally have poor low-speed torque. This structure effectively solves this problem, further enhancing the overall performance of the vehicle. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the installation structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the low-speed air intake structure of this utility model;

[0015] Figure 4 This is a schematic diagram of the high-speed air intake structure of this utility model;

[0016] Figure 5 This is a schematic diagram of the high-speed intake valve structure of this utility model;

[0017] Figure 6 This is a schematic diagram of the active opening valve structure of this utility model. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0019] One such Figure 1-5 The motorcycle air filter structure shown includes an air filter 1 with four intake pipes. The bottom of the air filter 1 is connected to two high-speed intake pipes 2 and two low-speed intake pipes 3, with the two high-speed intake pipes 2 facing forward and the two low-speed intake pipes 3 facing backward. A high-speed intake pipe 2 is connected to the front of the motorcycle via an extension pipe 4. A high-speed intake valve 5 is installed at the intake end of the extension pipe 4. The high-speed intake valve 5 includes a valve plate 51, a valve shaft 52, a valve spring 53, and a locking nut 54. The valve plate 51 is fixed to the valve shaft 52 by a pin. The valve spring 53 is sleeved on the valve shaft 52, with its other end limited on the valve shaft 52. The locking nut 54 is threaded onto the end of the valve shaft 52 and presses against the valve spring 53. Both ends of the valve shaft 52 are rotatably connected to the side wall of the extension pipe 4, and the other end of the valve spring 53 is limited on the extension pipe 4, so that the valve plate 51 initially closes the inlet of the extension pipe 4. This is a ram air intake structure. When the vehicle travels at high speed, the air in the passage is compressed by speed pressure, similar to the vortex principle in automobiles. The air density is compressed, the oxygen content increases, and the engine combustion is better. The faster the vehicle travels, the better the engine combustion and the better the overall vehicle performance.

[0020] like Figure 5 As shown, the extension tube 4 has grooves 41 on its two side walls, and bushings 42 are embedded in the grooves 41. The valve shaft 52 is rotatably engaged with the bushings 42.

[0021] like Figure 3As shown, the low-speed air intake pipe 3 is concealed within the motorcycle's body. When the vehicle's speed is below 50 km / h, the air filter receives air through this channel. This channel is individually designed to match the air intake volume for low-speed driving, allowing for individual tuning and maximization of torque and power in the low-speed range based on engine characteristics, resulting in better low-speed torque and handling. Simultaneously, compared to conventional structures, the reduced size of the air intake channel also reduces intake noise, improving rider comfort. When the vehicle traverses complex road surfaces such as mud and water, the rider will choose to drive at low speeds due to the complexity of the terrain. Because the air intake is located inside the engine, it effectively prevents the entry of mud, water, and other foreign objects, extending the life of the air filter element, reducing the risk of engine cylinder scoring, and increasing the vehicle's adaptability to various environments.

[0022] like Figure 4 As shown, in this embodiment, the diameter of the high-speed intake pipe 2 is designed to be larger than the diameter of the low-speed intake pipe 3. When the vehicle speed is below 50 km / h, the valve closes under the action of the spring force, allowing air to enter through the low-speed channel to ensure the vehicle's low-speed performance. When the vehicle speed is above 50 km / h, the valve opens when the speed pressure on the valve cross-section exceeds the spring force. At this time, air enters the air filter through the channel, ensuring the air intake volume of the air filter and thus ensuring the vehicle's high-speed performance. The opening and closing of the valve is controlled by the elastic force of the spring. The elastic force of the spring is calculated based on the weight and cross-sectional area of ​​the valve in the air intake channel and the vehicle speed (airflow velocity) when the valve needs to open. As shown in the figure, the elastic force of the spring of the air filter valve is designed to be 0.5 kPa at 50 km / h. When the valve surface is subjected to a pressure greater than 0.5 kPa, it will open. Then, as the speed increases, the degree of opening and closing increases until it reaches 100%. In addition, the valve door plate needs to be designed to be made of PP material, and the contact surface with the air intake channel is designed to be an inclined surface to reduce the impact of the vehicle road surface on the opening and closing of the valve.

[0023] like Figure 6 As shown, in other embodiments, a valve motor 55 is installed on the extension pipe 4. The output shaft of the valve motor 55 is connected to the valve shaft 52 via a coupling, and is used to actively control the opening size of the valve plate 51. This is a schematic diagram of the active valve structure, which adds a motor to the passive valve. The working principle is the same as that of the passive valve, except that the valve is controlled by a motor instead of a spring. Because vehicles face various operating conditions during driving, such as low air density at high altitudes or strong winds, the passive valve cannot control the opening and closing in the optimal way. With the addition of a motor, it can be controlled by a program. Combining engine speed and fuel injection quantity, the ECU module comprehensively analyzes and obtains the optimal opening and closing degree of the valve, ensuring better and more linear performance output of the vehicle. It can also cope with more complex environments, but the cost will be higher, making it suitable for some high-end models.

[0024] The beneficial effects of this invention include:

[0025] 1. This structure effectively solves the disadvantage of poor low-speed torque in high-revving motorcycles. It ensures torque performance at low speeds, improves low-speed power, handling, and smoothness. It also solves the problem of high engine noise at low speeds, improving the vehicle's NVH (noise, vibration, and harshness) experience and enhancing product competitiveness.

[0026] 2. This structure has wide applicability. Considering cost, the passive valve structure is simple and low-cost, making it suitable for entry-level vehicles to improve performance and NVH (noise, vibration, and harshness) levels, giving the vehicles a competitive edge. High-end vehicles, on the other hand, use an active valve structure to achieve an even more extreme performance experience. Currently, no such structure has been found on the market, allowing for differentiation and enhanced product competitiveness through superior performance.

[0027] 3. This arrangement structure is highly practical and versatile, applicable to all vehicle models, and has the most significant improvement effect on models with high-revving engines. In particular, current racing cars with 3-cylinder and 4-cylinder engines generally have poor low-speed torque, and this structure can effectively solve this problem, further improving the overall vehicle performance.

[0028] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of this utility model. The description of the above embodiments is only for helping to understand the principles of the embodiments of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A motorcycle air filter structure with an adjustable intake passage, characterized in that: The system includes an air filter (1), the bottom of which is connected to two high-speed intake pipes (2) and two low-speed intake pipes (3). The two high-speed intake pipes (2) are arranged facing forward, and the two low-speed intake pipes (3) are arranged facing backward. The high-speed intake pipes (2) are connected to the front of the motorcycle via extension pipes (4). A high-speed intake valve (5) is provided at the air inlet end of the extension pipe (4). The high-speed intake valve (5) includes a valve door plate (51), a valve shaft (52), a valve spring (53), and a locking nut (54). The valve door plate (51) is secured by a pin. The valve spring (53) is fixed on the valve shaft (52) and sleeved on the valve shaft (52). The other end of the valve spring (53) is limited on the valve shaft (52). The locking nut (54) is threadedly fitted to the end of the valve shaft (52) and presses the valve spring (53). The two ends of the valve shaft (52) are rotatably connected to the side wall of the extension tube (4). The other end of the valve spring (53) is limited on the extension tube (4), so that the valve door plate (51) initially closes the inlet of the extension tube (4).

2. The motorcycle air filter structure with adjustable intake passage according to claim 1, characterized in that: The extension tube (4) has grooves (41) on its two side walls, and a bushing (42) is embedded in the grooves (41). The valve shaft (52) is rotatably engaged with the bushing (42).

3. The motorcycle air filter structure with adjustable intake passage according to claim 1, characterized in that: The diameter of the high-speed intake pipe (2) is larger than the diameter of the low-speed intake pipe (3).

4. The motorcycle air filter structure with adjustable intake passage according to claim 1, characterized in that: The low-speed air intake pipe (3) is hidden inside the motorcycle body.

5. A motorcycle air filter structure with an adjustable intake passage according to claim 1, characterized in that: A valve motor (55) is provided on the extension tube (4). The output shaft of the valve motor (55) is connected to the valve shaft (52) through a coupling, and is used to actively control the opening size of the valve door (51).

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