Variable air inlet system and motorcycle
By adjusting the synchronous swing of the valve plate to control the length and flow area of the intake passage, the problem of uneven power output of the motorcycle engine under different operating conditions is solved, and the engine can achieve smooth power output at low throttle, thus improving the motorcycle driving experience.
Patent Information
- Application Number
- CN202520192924.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-07
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2035-02-07
AI Technical Summary
Existing motorcycle engines have difficulty flexibly switching the length and flow area of the intake passage under different operating conditions, resulting in uneven engine power output, especially prone to surge at small throttle openings.
The intake channel is switched and the flow area is adjusted by using a regulating valve. The connection and disconnection of the long and short intake channels and the exhaust channel are controlled by the synchronous swing of two valve plates, and the valve works together with the throttle body to achieve a dual throttling effect.
It achieves the power and torque requirements at different speeds, ensuring that the intake volume increases smoothly when the engine gradually increases the throttle, resulting in smoother power output and improved start-up and acceleration smoothness of the motorcycle.
Smart Images
Figure CN223594312U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to motorcycle technical field relates to a variable intake system and motorcycle. BACKGROUND
[0002] When the motorcycle is running, the air intake passage of different length is switched to make the engine have greater torque under the medium and low speed operating condition and have greater power under the high speed operating condition, that is, the longer air intake pipe is selected at medium and low speed, and the shorter air intake pipe is switched at high speed. In the prior art, the butterfly valve is used to control the structure of different length air intake under low and high speed, for example, two butterfly valves can realize long and short air intake, that is, the butterfly valves are added on the long air intake length passage and the variable air intake length passage (the maximum length of the passage is less than that of the long air intake length passage), and the path length of air flow is realized by opening and closing of the two butterfly valves. However, this design needs to control the variable length device and the opening of the two butterfly valves to realize the flow area of each passage, which increases the complexity of mechanical structure and control and increases the production cost. However, if one butterfly valve is used to realize long and short air intake, the flow area of long and short air intake passages cannot be changed at the same time, and the function is limited.
[0003] In addition, in order to ensure the maximum power output of the motorcycle at full throttle, the throttle throat diameter is often large, and the throttle effect of the intake valve and the intake passage is also greatly released. These make the engine intake change too much when the small throttle opening is twisted, and the engine power output increases too fast (that is, the motorcycle appears to be a burst), thereby affecting the driving experience of the motorcycle. In order to improve the problem, the intake needs to be additionally throttled at small throttle opening, that is, the double throttling effect is realized together with the throttle.
[0004] In order to solve the above problems, a variable intake system is needed, which realizes the mutual switching between the air intake passages of different length under different operating conditions by one mechanism, and also realizes the adjustment of the actual flow area of different passages. Utility model content
[0005] Therefore, the utility model provides a variable intake system and motorcycle, the regulating valve in the variable intake system realizes the switching of the air intake passage and the adjustment of the actual flow area of each passage, not only realizes the power torque demand under different speeds, but also realizes the double throttling effect together with the throttle body, thereby improving the smoothness problem of the motorcycle at start or acceleration.
[0006] The utility model discloses a variable intake system, which comprises:
[0007] The air intake passage is provided with two air intake paths, i.e., a long air intake passage and a short air intake passage with different lengths;
[0008] The exhaust passage is used to send the air received by the air intake passage to the engine.
[0009] The long air intake passage and the short air intake passage are switched to be communicated with the exhaust passage through the regulating valve, and the flow area after being communicated can be adjusted.
[0010] Further, at least one of the long air intake passage and the short air intake passage is communicated with the exhaust passage during the switching process.
[0011] Further, the regulating valve comprises a valve rod and a valve plate fixedly arranged on the valve rod, the valve rod can be operated to rotate, and the valve plate is synchronously swung to switch the communication of the long air intake passage and the short air intake passage with the exhaust passage and to adjust the flow area after being communicated.
[0012] Further, the valve plate is provided with two valve plates, i.e., a valve plate I and a valve plate II, the valve plate I and the valve plate II are arranged at an angle, the valve plate I and the valve plate II form an included angle α, the exhaust passage and the central axis of the valve rod form an included angle β, and the angle of the included angle α is not greater than the angle of the included angle β.
[0013] Further, the regulating valve has a first inlet and a second inlet, the short air intake passage is installed at the first inlet, and the long air intake passage is installed at the second inlet, the first inlet, the exhaust passage and the second inlet are sequentially arranged along the rotation direction of the valve rod.
[0014] Further, the valve plate I is arranged close to the first inlet, the valve plate II is arranged close to the second inlet, and the valve plate I and the valve plate II can be synchronously swung to follow the rotation of the valve rod;
[0015] The valve plate I is swung to be controlled to communicate or disconnect the short air intake passage with the exhaust passage, and the valve plate I can be swung to be controlled to adjust the flow area of the short air intake passage communicated with the exhaust passage when the short air intake passage is communicated with the exhaust passage;
[0016] The valve plate II is swung to be controlled to communicate or disconnect the long air intake passage with the exhaust passage, and the valve plate II can be swung to be controlled to adjust the flow area of the long air intake passage communicated with the exhaust passage when the long air intake passage is communicated with the exhaust passage.
[0017] Further, the regulating valve further comprises a front wall and a rear wall, the front wall and the rear wall are connected to each other to form a hollow cavity structure, the first inlet and the second inlet are arranged on the front wall, and the valve rod is installed on the front wall and located at a position between the first inlet and the second inlet.
[0018] Further, the rear wall is arc-shaped, the exhaust passage is arranged on the rear wall and located on the median line of the line connecting the first inlet and the second inlet, and the valve rod is arranged at the arc center of the rear wall.
[0019] Further, the air filter is further included, and the air inlet passage, the exhaust passage and the adjusting valve are arranged in the air filter.
[0020] The utility model discloses still disclose a kind of motorcycles, including motorcycle frame, which is equipped with the variable intake system of preceding.
[0021] The utility model has the advantages of:
[0022] The utility model discloses a kind of variable intake system and motorcycle, the action of valve plate in control adjusting valve is controlled to realize the switching of air inlet passage, to realize the air intake of different path length, realize that air inlet path length is variable;Simultaneously, two valve plates can also correspond to adjust the actual flow area of two different length air inlet passages, to realize that flow area is variable, not only satisfy the power torque demand under different rotational speed, guarantee that engine has better low speed torque and high speed performance;And the adjusting valve can be cooperated with throttle body to realize double throttling effect, ensure that the increase of engine air intake when gradually increasing accelerator by driver, engine air intake increases more gently, overall power output is more gentle, smooth, to improve the smoothness problem of motorcycle when starting or accelerating, avoid the problem of motorcycle acceleration. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 For the structure schematic view of long air inlet passage full opening in the embodiment of the utility model;
[0024] Figure 2 For the structure schematic view of long air inlet passage throttling in the embodiment of the utility model;
[0025] Figure 3 For the structure schematic view of long air inlet passage and short air inlet passage air intake overlap in the embodiment of the utility model;
[0026] Figure 4 For the structure schematic view of short air inlet passage part throttling in the embodiment of the utility model;
[0027] Figure 5 For the structure schematic view of short air inlet passage full opening in the embodiment of the utility model;
[0028] Figure 6 For the arrangement structure schematic view of valve plate I and valve plate II of the utility model. DETAILED DESCRIPTION
[0029] It should be noted that in the description of the present application, the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the present embodiment, the front and back are referred to as the order of the filtered air flow, with the inflow being the front and the outflow being the back.
[0030] As shown in the figure, the embodiment of the present application discloses a variable intake system, comprising an intake passage, an exhaust passage 6 and a regulating valve, the intake passage is used for receiving the filtered air of the air filter 1; the intake passage is provided with two, which are long intake passage 2 and short intake passage with different intake path lengths; the exhaust passage 6 is used for sending the air received by the intake passage to the engine; the long intake passage 2 and the short intake passage are switched to be communicated with the exhaust passage 6 through the regulating valve, and the flow area after communication is adjustable. In the present embodiment, the long intake passage 2 and the short intake passage are communicated with the exhaust passage 6 through the regulating valve, by operating the regulating valve, the switching of the long intake passage 2 and the short intake passage can be realized, and then the intake of different path lengths is realized, and the variable intake path length is realized; at the same time, the actual flow area between the corresponding communicated intake passage and the exhaust passage 6 can be further adjusted by operating the regulating valve, so as to realize the variable flow area, not only to meet the power torque demand under different speeds, but also to ensure that the engine has better medium and low speed torque and high speed performance; and the regulating valve can be cooperated with the throttle body to realize double throttling effect, so as to ensure that the increase of engine intake amount is more gentle when the driver gradually increases the throttle, and the overall power output is more gentle and smooth.
[0031] In the present embodiment, at least one of the long intake passage 2 and the short intake passage is communicated with the exhaust passage 6 in the switching process. In order to avoid the interruption of intake, at least one intake passage must be communicated with the exhaust passage 6 when switching the intake passage.
[0032] In the embodiment, the adjusting valve comprises a valve rod 4 and a valve plate fixedly arranged on the valve rod 4, the valve rod 4 can be operated to rotate, and the valve plate synchronously swings to switch the communication of the long intake passage 2 and the short intake passage with the exhaust passage 6 and adjust the flow area after the communication. In the embodiment, the valve plate can be one or more. When one valve plate is arranged, the valve plate is arranged as a sector in section to simultaneously realize the two functions of switching the intake passage and adjusting the flow area of the corresponding passage. A plurality of valve plates can also be simultaneously arranged. In the embodiment, two valve plates are arranged, which are a valve plate I 7 and a valve plate II 9. The valve plate I 7 and the valve plate II 9 are arranged at an angle, the valve plate I 7 and the valve plate II 9 form an included angle α, the exhaust passage 6 and the central axis of the valve rod 4 form an included angle β, and the angle of the included angle α is not greater than the angle of the included angle β. As shown in Figure 1 , the included angle formed between the valve plate I 7 and the valve plate II 9 is the included angle α, and the included angle formed between the exhaust passage 6 and the central axis of the valve rod 4 refers to two rays emitted from the central axis of the valve rod 4, which are tangent to the upper end point and the lower end point of the front end of the exhaust passage 6, thereby forming an included angle, as shown in Figure 1 . The angle of the included angle α is not greater than the angle of the included angle β. The valve plate I 7 and the valve plate II 9 are arranged at an angle, and the switching of the intake passage and the adjustment of the actual flow area of each passage can be completed in the synchronous swinging process of the two valve plates. In the swinging process, when the angle of the included angle α is equal to the angle of the included angle β, the two intake passages will not be simultaneously communicated with the exhaust passage 6 at this moment, but this condition is an ideal working condition. In the actual operation process, since the switching of the two valve plates needs time, if the angle of the included angle α is strictly designed to be the same as the angle of the included angle β, the engine will be extinguished due to the short-time interruption of intake, which will affect the normal operation of the engine. Therefore, the angle of the included angle α is 1-5° smaller than the angle of the included angle β when the valve plates are arranged. In this way, when the intake passage is switched, the two intake passages will have an intake overlapping area (that is, the two intake passages have a certain opening, as shown in Figure 3 ), which can avoid the situation that the engine cannot intake and is extinguished when the passage is switched. Since the switching of the passage is instantaneous and the duration is very short, the influence of the overlapping area of the intake passage on the power output can be ignored, and the motorcycle driver will not obviously perceive it. The two valve plates in the embodiment are arranged for the intake of one cylinder. If it is a multi-cylinder engine, such as a four-cylinder engine, four sets of valve plates are arranged, each set having two valve plates, as shown in Figure 6 . This is immediately known by those skilled in the art, and will not be described here.
[0033] The adjusting valve has a first inlet 3 and a second inlet in the embodiment, the short intake passage is installed at the first inlet 3, the long intake passage 2 is installed at the second inlet, the first inlet 3, the exhaust passage 6 and the second inlet are sequentially arranged along the rotation direction of the valve rod 4, and the sequential arrangement can ensure that the two valve plates can control the communication of the long intake passage 2 and the short intake passage with the exhaust passage 6 respectively. In the embodiment, the adjusting valve further comprises a front wall and a rear wall, the front wall and the rear wall are connected to each other to form a hollow cavity structure, the first inlet 3 and the second inlet are arranged on the front wall, and the valve rod 4 is installed on the front wall and located at a position between the first inlet 3 and the second inlet. In the embodiment, the rear wall is an arc structure, and the valve rod 4 is located at the arc center of the rear wall. In the embodiment, the exhaust passage 6 is arranged on the rear wall and located on the median line of the connecting line of the first inlet 3 and the second inlet. As shown in the figure, in the embodiment, the inlet 10 of the long intake passage 2 and the inlet of the short intake passage are both located in the air filter 1, and the outlet of the exhaust passage 6 is located outside the air filter 1 and connected to the engine. The front wall in the embodiment is a linear structure, and the rear wall is a semicircular arc. After the front wall and the rear wall are connected to each other, a cavity with a "D" shape is formed, the valve plate I 7 and the valve plate II 9 are both in the cavity, the valve rod 4 is located at the arc center of the rear wall, and the valve plate I 7 and the valve plate II 9 both extend to the inner wall surface of the rear wall. In this way, it can be ensured that the valve plate I 7 and the valve plate II 9 can separate the long intake passage 2 and the short intake passage (except that the intake air will overlap when the intake passage is switched), and ensure that the engine runs smoothly. In the embodiment, the short intake passage is hidden, and it can also be cancelled, and the air is directly taken in through the first inlet 3, and the first inlet 3 replaces the short intake passage. This can be understood by those skilled in the art, and will not be described here. Whether the short intake passage is arranged or not, the length of the long intake passage 2 is greater than that of the short intake passage.
[0034] In this embodiment, the valve plate I 7 is arranged close to the first inlet 3, the valve plate II 9 is arranged close to the second inlet, and the valve plate I 7 and the valve plate II 9 are synchronous actions; the valve plate I 7 is controlled to swing to make the short intake passage communicate with or disconnect from the exhaust passage 6, and the valve plate I 7 can be controlled to swing to adjust the flow area of the short intake passage when the short intake passage communicates with the exhaust passage 6. In this embodiment, the valve plate II 9 is controlled to swing to make the long intake passage 2 communicate with or disconnect from the exhaust passage 6, and the valve plate II 9 can be controlled to swing to adjust the flow area of the long intake passage 2 when the long intake passage 2 communicates with the exhaust passage 6. In this embodiment, the valve rod 4 is connected with the direct current servo motor, the angle of rotation of the valve rod 4 is controlled by the motor, the control signal of the motor is sent by the ECU, and the duty ratio of different PWM signals can adjust the current of the motor, so that the control valve rotates different angles, and then the switching of the intake passage with different path lengths and the adjustment of the flow area in the corresponding passage are realized. Through the rotation of the valve rod 4, the valve plate I 7 closes the short intake passage, the valve plate II 9 opens the long intake passage 2 and gradually adjusts to the maximum opening; or the valve plate II 9 closes the long intake passage 2, and the valve plate I 7 opens the short intake passage and gradually adjusts to the maximum opening, which is as follows:
[0035] The exhaust passage 6 in this embodiment divides the rear wall into two parts of the upper circular arc wall 5 and the lower circular arc wall 8, when the valve plate I 7 and the valve plate II 9 are located in the area corresponding to the upper circular arc wall 5, at this time the short intake passage is closed and the long intake passage 2 is fully opened, as shown in Figure 1 ;
[0036] When the valve plate I 7 is located in the area corresponding to the upper circular arc wall 5 and the valve plate II 9 is located in the area corresponding to the exhaust passage 6, at this time the short intake passage is still closed and the long intake passage 2 is partially opened and in the throttling state, as shown in Figure 2 ;
[0037] When the valve plate I 7 and the valve plate II 9 are located in the area corresponding to the exhaust passage 6, at this time the short intake passage and the long intake passage 2 both have a certain opening, and the intake areas overlap, at this time it is the switching moment of the intake passage, as shown in Figure 3 ;
[0038] When the valve plate I 7 is located in the area corresponding to the exhaust passage 6 and the valve plate II 9 is located in the area corresponding to the lower circular arc wall 8, at this time the long intake passage 2 is closed and the short intake passage is partially opened and in the throttling state, as shown in Figure 4 ;
[0039] When the valve plate I 7 and the valve plate II 9 are located in the area corresponding to the lower circular arc wall 8, at this time the long intake passage 2 is closed and the short intake passage is fully opened, as shown in Figure 5 .
[0040] In the embodiment, the air filter 1 is further included, and the air inlet channel, the air outlet channel 6 and the regulating valve are arranged in the air filter 1. The air inlet channel, the air outlet channel 6 and the regulating valve arranged in the air filter 1 can make the structure more compact and more conducive to assembly.
[0041] The embodiment further discloses a motorcycle including a motorcycle frame, and the motorcycle frame is equipped with the variable intake system. After the motorcycle is equipped with the variable intake system, the motorcycle has better low-speed and medium-speed torque and high-speed performance, and the overall power output of the engine is more smooth, thereby effectively improving the smoothness problem of the motorcycle at start or acceleration and avoiding the problem of engine surge of the motorcycle at acceleration.
[0042] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the utility model and are not limited. Although the utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the utility model can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions of the utility model, and all should be included in the scope of the claims of the utility model.
Claims
1. A variable intake system characterized by, The variable intake system comprises: an air intake passage for receiving air filtered by an air cleaner, the air intake passage being provided with two air intake passages of different lengths, i.e. a long air intake passage and a short air intake passage; an air exhaust passage for discharging air received by the air intake passage to an engine; a regulating valve, the long air intake passage and the short air intake passage being switchable to be in communication with the air exhaust passage through the regulating valve, and the flow area after being in communication being adjustable.
2. The variable intake system according to claim 1, characterized by: At least one of the long air intake passage and the short air intake passage is in communication with the air exhaust passage during switching.
3. The variable intake system according to claim 1, characterized by: The regulating valve comprises a valve stem and valve plates fixed to the valve stem, the valve stem being rotatable, and the valve plates being synchronously swingable to switch the long air intake passage and the short air intake passage to be in communication with the air exhaust passage and to adjust the flow area after being in communication.
4. The variable intake system according to claim 3, characterized by: The valve plates are provided with two valve plates I and II, the valve plates I and II being arranged at an angle, the valve plate I and the valve plate II forming an included angle α, the air exhaust passage and the central axis of the valve stem forming an included angle β, and the angle α being not greater than the angle β.
5. The variable intake system according to claim 4, characterized by: The regulating valve has a first inlet and a second inlet, the short air intake passage being installed at the first inlet, and the long air intake passage being installed at the second inlet, the first inlet, the air exhaust passage and the second inlet being sequentially arranged along the rotation direction of the valve stem.
6. The variable intake system according to claim 5, characterized by: The valve plate I is arranged close to the first inlet, the valve plate II is arranged close to the second inlet, and the valve plates I and II are synchronously swingable with the rotation of the valve stem. The valve plate I is swingable to switch the short air intake passage to be in communication with or disconnected from the air exhaust passage, and the valve plate I is swingable to adjust the flow area of the short air intake passage in communication with the air exhaust passage. The valve plate II is swingable to switch the long air intake passage to be in communication with or disconnected from the air exhaust passage, and the valve plate II is swingable to adjust the flow area of the long air intake passage in communication with the air exhaust passage.
7. The variable intake system according to claim 5, characterized by: The regulating valve further comprises a front wall and a rear wall, the front wall and the rear wall being connected to each other to form a hollow cavity structure, the first inlet and the second inlet being arranged at the front wall, and the valve stem being installed at the front wall and located at a position between the first inlet and the second inlet.
8. The variable intake system according to claim 7, characterized by: The rear wall is an arc structure, the air exhaust passage is arranged at the rear wall and located on the perpendicular bisector of the line connecting the first inlet and the second inlet, and the valve stem is arranged at the arc center of the rear wall.
9. The variable intake system according to any one of claims 1-8, characterized by: The variable intake system further comprises an air cleaner, the air intake passage, the air exhaust passage and the regulating valve being arranged in the air cleaner.
10. A motorcycle comprising a motorcycle frame, characterised in that: The motorcycle frame is equipped with the variable intake system according to claim 9.