powertrain

Abstract

The application provides a power assembly, which comprises an engine and an air filter. The engine comprises a cylinder head, an air inlet channel is formed on the cylinder head, the air filter is communicated with the air inlet channel, the air filter comprises an air filter shell and an air filter cover, the air filter shell forms an air filter space, the air filter cover seals the air filter space, the air filter shell is provided with an air filter air inlet and an air filter air outlet which are communicated with the air filter space, a driving mechanism, a first air guide pipe and a second air guide pipe are arranged in the air filter space, one end of the first air guide pipe is communicated with the air filter air outlet, the other end of the first air guide pipe can be communicated with or separated from the second air guide pipe, the second air guide pipe is installed on the driving mechanism and can move under the action of the driving mechanism, so that a gap for air circulation is formed between the first air guide pipe and the second air guide pipe. Through the above arrangement, the engine can have high output power under different working conditions.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a powertrain. Background Technology

[0002] The powertrain includes an engine and an air filter that filters impurities from the air. The air filter filters the air and then introduces it into the engine's combustion chamber through the intake passage to improve the combustion efficiency of the fuel-air mixture in the combustion chamber.

[0003] An air filter includes an air duct that connects to the intake passage, and the structure of the air duct affects engine efficiency. In some related technologies, if the air duct is too long, the engine speed above a certain threshold will lead to a weakening of the inertial effect, reducing the engine's intake efficiency; if the air duct is too short, the air filter's intake resistance will be high, reducing the engine's intake efficiency and consequently reducing engine power. Therefore, existing air filter designs cannot meet the complex operating conditions of engines to ensure their efficiency. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the purpose of this application is to provide a powertrain with a higher air delivery efficiency of its air filter.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] This application provides a powertrain including an engine and an air filter. The engine includes a cylinder head with an intake passage formed thereon. The air filter communicates with the intake passage. The air filter includes an air filter housing and an air filter cover. The air filter housing forms an air filter space, and the air filter cover closes the air filter space. The air filter housing has an air filter inlet and an air filter outlet communicating with the air filter space. A drive mechanism, a first air guide pipe, and a second air guide pipe are disposed in the air filter space. One end of the first air guide pipe communicates with the air filter outlet, and the other end of the first air guide pipe can communicate with or be separated from the second air guide pipe. The second air guide pipe is installed on the drive mechanism and can move under the action of the drive mechanism, so that a gap is formed between the first air guide pipe and the second air guide pipe to allow air to flow.

[0007] Furthermore, viewed from the direction of the air filter inlet, at least a portion of the air filter inlet is located between the first air guide tube and the second air guide tube.

[0008] Furthermore, both the first and second air guide tubes are tubular structures. The first air guide tube forms a first air guide channel, and the second air guide tube forms a second air guide channel. When viewed along the extension direction of the first air guide channel, the first air guide channel and the second air guide channel overlap.

[0009] Furthermore, when the engine speed is less than the set speed threshold, the second air guide pipe is separated from the first air guide pipe under the action of the drive mechanism; when the engine speed is greater than or equal to the set speed threshold, the second air guide pipe is connected to the first air guide pipe under the action of the drive mechanism.

[0010] Furthermore, the first air duct is integrally formed with the air filter housing.

[0011] Furthermore, the air filter space is provided with a pair of first air guide pipes and a pair of second air guide pipes corresponding to the pair of first air guide pipes. The pair of second air guide pipes are installed on the drive mechanism and can move synchronously under the action of the drive mechanism.

[0012] Furthermore, the drive mechanism includes a lead screw, a motor, and a support bracket. One end of the lead screw is connected to the bottom of the air filter housing and can rotate relative to the air filter housing. The other end of the lead screw is connected to the motor. The support bracket is sleeved on the lead screw. The opposite sides of the support bracket are respectively connected to a pair of second air guide pipes, and the support bracket is threadedly engaged with the lead screw.

[0013] Furthermore, the drive mechanism also includes a transmission bracket that engages with the lead screw thread. If there are two or more pairs of second air guide pipes in the air filter space, each pair of second air guide pipes is connected by a receiving bracket, and the transmission bracket is connected to the receiving bracket of each pair of second air guide pipes.

[0014] Furthermore, the drive mechanism includes a rod-shaped limiting member, the extension direction of which is parallel to the extension direction of the lead screw, and a receiving bracket sleeved on the limiting member and in clearance fit with the limiting member.

[0015] Furthermore, the drive mechanism includes a rod-shaped limiting member, which is fixed to the air filter housing and passes through the receiving bracket. The extending direction of the limiting member is parallel to the extending direction of the lead screw.

[0016] The engine provided in this application has a second air guide pipe that is separated from or connected to the first air guide pipe under the action of a drive mechanism. When the engine speed is less than a set speed threshold, the second air guide pipe is separated from the first air guide pipe under the action of the drive mechanism, creating a gap between the first and second air guide pipes. When the engine speed is greater than or equal to the set speed threshold, the second air guide pipe is connected to the first air guide pipe under the action of the drive mechanism. Air can pass through the second air guide channel and the first air guide channel in sequence to change the intake resistance of the air filter, thereby improving the engine output power under different operating conditions. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the engine structure in the embodiment of this application;

[0018] Figure 2This is an exploded view of the air filter in the embodiment of this application;

[0019] Figure 3 This is a cross-sectional view of the air filter in the embodiment of this application;

[0020] Figure 4 This is a structural diagram of the air filter and the head tube in the embodiment of this application;

[0021] Figure 5 This is an exploded view of the air filter and the head tube in the embodiment of this application. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present application, the technical solutions in specific embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0023] It should be noted that the terms "first," "second," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. "A plurality" or "several" indicates at least two. "Comprising" or "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. "Connected" or "linked" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0024] like Figure 1 As shown, this application provides a powertrain 10, which includes an engine 100. The engine 100 includes a housing 11, and the housing 11 includes a cylinder head cover 111, a cylinder head 112, a cylinder block 113, a crankcase 114, and an oil pan 115 connected sequentially from top to bottom.

[0025] like Figure 2 and Figure 3 As shown, the cylinder head 112 has an intake passage 1121a. The powertrain 10 also includes an air filter 500, which is disposed on the cylinder head 112 and communicates with the intake passage 1121a of the cylinder head 112. The air filter 500 is used to filter air and introduce it into the intake passage 1121a, providing the combustion chamber (not shown) with less impurities.

[0026] In one implementation, the air filter 500 includes an air filter housing 51 and an air filter cover 52. The air filter housing 51 and the air filter cover 52 form an air filter space 53, and the air filter cover 52 encloses the air filter space 53. The air filter housing 51 has an air filter inlet 511 and an air filter outlet 512 communicating with the air filter space 53, allowing air to enter the air filter space 53 through the air filter inlet 511. The air filter outlet 512 communicates with the intake passage 1121a of the cylinder head 112, and is used to introduce air from the air filter space 53 into the intake passage 1121a. The air filter space 53 is equipped with a drive mechanism 513, a first air guide pipe 514, and a second air guide pipe 515. The first air guide pipe 514 is connected to the air filter housing 51, and one end of the first air guide pipe 514 is connected to the air filter outlet 512. The other end of the first air guide pipe 514 can be connected to or separated from the second air guide pipe 515. The second air guide pipe 515 is connected to the drive mechanism 513 and is installed perpendicular to the movement direction of the drive mechanism 513. The second air guide pipe 515 can move under the action of the drive mechanism 513, so that the second air guide pipe 515 is connected to or separated from the first air guide pipe 514. When the second air guide pipe 515 is separated from the first air guide pipe 514, a gap 501 is formed between the second air guide pipe 515 and the first air guide pipe 514 to allow air to flow. The width of the gap 501 is adjustable.

[0027] The first air guide tube 514 and the second air guide tube 515 are both tubular structures, which are used to guide the direction of air flow.

[0028] Specifically, a first air guide channel 5141 is formed in the first air guide tube 514, and a second air guide channel 5151 is formed in the second air guide tube 515. When viewed along the extension direction of the first air guide channel 5141, the first air guide channel 5141 and the second air guide channel 5151 overlap.

[0029] Furthermore, when viewed from the direction of the air filter inlet 511, the air filter inlet 511 and the gap 501 at least partially overlap.

[0030] In the embodiments of this application, when the engine speed of 100 is less than a set speed threshold, the second air guide pipe 515 separates from the first air guide pipe 514 under the action of the drive mechanism 513, making the width of the gap 501 greater than 0. Air can enter the first air guide channel 5141 along the gap 501 and enter the engine 100 through the air filter outlet 512. At this time, the influence of intake resistance on the intake effect of the engine 100 is greater than the influence of inertial effect and pressure wave reflection on the intake effect of the engine 100. The air flows a shorter distance in the air guide channel, which can reduce intake resistance, thereby improving the intake effect of the engine 100, thereby increasing the torque of the engine 100 and increasing the output power of the engine 100.

[0031] When the engine speed of 100 is greater than or equal to a set speed threshold, the second air guide pipe 515 is connected to the first air guide pipe 514 under the action of the drive mechanism 513. Air can pass through the second air guide channel 5151 and the first air guide channel 5141 in sequence, and enter the engine 100 through the air filter outlet 512. At this time, the influence of inertial effect and pressure wave reflection on the intake effect of engine 100 is greater than the influence of intake resistance. The air flows a longer distance in the air guide channel, which can enhance the inertial effect and pressure wave reflection, thereby improving the intake effect of engine 100 and increasing the output power of engine 100.

[0032] With the above settings, depending on the relationship between the engine speed and the set speed threshold, the intake resistance, inertial effect and pressure wave have different effects on the intake effect of the engine 100. The second air guide pipe 515 is separated from or connected to the first air guide pipe 514 under the action of the drive mechanism 513, so as to improve the output power of the engine 100 when the engine 100 has different speeds.

[0033] As one implementation, the first air duct 514 is integrally formed with the air filter housing 51, which facilitates the installation of components inside the air filter 500.

[0034] Optionally, the first air guide tube 514 is detachably connected to the air filter housing 51, making it easier to maintain and replace the first air guide tube 514.

[0035] like Figure 2 and Figure 3 As shown, in one implementation, the air filter space 53 is provided with a pair of first air guide pipes 514 and a pair of second air guide pipes 515 corresponding to the pair of first air guide pipes 514. The pair of second air guide pipes 515 are installed on the drive mechanism 513 and can move synchronously under the action of the drive mechanism 513.

[0036] Specifically, the drive mechanism 513 includes a lead screw 5131, a motor 5132, and a support bracket 5133. One end of the lead screw 5131 is connected to the bottom of the air filter housing 51 and can rotate relative to the air filter housing 51. The other end of the lead screw 5131 is connected to the motor 5132, which is fixed to the air filter cover 52. The support bracket 5133 is sleeved on the lead screw 5131. The opposite sides of the support bracket 5133 are respectively connected to a pair of second air guide pipes 515, and the support bracket 5133 and the lead screw 5131 are threaded together. The movement direction of the second air guide pipes 515 is the extension direction of the lead screw 5131.

[0037] When the motor 5132 drives the lead screw 5131 to rotate, the support bracket 5133 moves along the extension direction of the lead screw 5131 under the action of the lead screw 5131, thereby driving a pair of second air guide tubes 515 to move synchronously.

[0038] Furthermore, if the air filter space 53 is provided with two or more pairs of second air guide pipes 515, each pair of second air guide pipes 515 is connected by a receiving bracket 5133, the drive mechanism 513 also includes a transmission bracket 5134, which is connected to the receiving bracket 5133 of each pair of second air guide pipes 515. The lead screw 5131 passes through the transmission bracket 5134 and is threadedly engaged with the transmission bracket 5134, so that the transmission bracket 5134 can move in the extension direction of the lead screw 5131, thereby driving the two or more pairs of second air guide pipes 515 to move synchronously.

[0039] In one implementation, the drive mechanism 513 includes a rod-shaped limiting member 5135, which is fixed to the air filter housing 51. The extension direction of the limiting member 5135 is substantially parallel to the extension direction of the lead screw 5131. The receiving bracket 5133 is sleeved on the limiting member 5135 and is clearance-fitted with the limiting member 5135 to limit the transmission bracket 5134 during the operation of the drive mechanism 513, so as to prevent the transmission bracket 5134 from moving along the circumferential direction of the lead screw 5131 and affecting the movement of the transmission bracket 5134 along the extension direction of the lead screw 5131.

[0040] Specifically, a limiting member 5135 is provided between either of the pair of second air guide tubes 515 and the lead screw 5131.

[0041] With the above configuration, when the motor drives the lead screw 5131 to rotate, the transmission bracket 5134 moves under the influence of the rotation of the lead screw 5131. Due to the limiting member 5135 limiting the transmission bracket 5134, the transmission bracket 5134 moves linearly along the extension direction of the lead screw 5131, thereby driving the receiving bracket 5133 to move along the extension direction of the lead screw 5131, and thus causing a pair of second air guide pipes 515 to move along the extension direction of the lead screw 5131, realizing the synchronous separation or connection of a pair of first air guide pipes 514 and a pair of second air guide pipes 515.

[0042] In the embodiments of this application, the engine 100 is a V4 engine with two cylinder heads 112. Each cylinder head 112 is equipped with a pair of first air guide pipes 514 and a pair of second air guide pipes 515 corresponding to the pair of first air guide pipes 514. Each pair of first air guide pipes 514 is respectively installed on a drive mechanism 513, and each of the above-mentioned second air guide pipes 515 is provided with a limit member 5135 between it and the lead screw 5131.

[0043] like Figure 4As shown, the powertrain 10 provided in this application is applied to a motorcycle, wherein the motorcycle includes a frame 600, and the foremost part of the frame 600 is the head tube 61 of the frame 600. To clearly illustrate the embodiments of this application, the following are also defined: Figure 4 The front-back and up-down directions shown are used as the front-back and up-down directions of the frame 600.

[0044] like Figures 3 to 5 As shown, the engine 100 includes an ignition device 17, which is detachably mounted to the cylinder head cover 111 of the engine 100. At least a portion of the ignition device 17 extends toward the air filter 500 and beyond the outer casing 11 of the engine 100. A recessed area 55 is formed between the headpipe 61 and the air filter 500, within which the ignition device 17 and at least a portion of the intake pipe 54 are disposed. The air filter 500 is connected to the engine 100 and covers the ignition device 17. The air filter 500 includes an air filter housing 51 and an intake pipe 54. The air filter housing 51 is connected to the headpipe 61 via the intake pipe 54. The air filter housing 51 forms an air filter space 53. The intake pipe 54 is capable of elastic deformation and has two opposing openings, one communicating with the air filter space 53 and the other communicating with a space within the headpipe 61. The two openings of the intake pipe 54 face an angle between them.

[0045] For example, the air intake pipe 54 may be a rubber hose.

[0046] Optionally, engine 100 also includes throttle valve 163 (see Figure 3 The throttle valve 163 is located within the recessed area 55 and is used to adjust the intake air volume of the combustion chamber 101. In some embodiments, both the intake pipe 54 and the air filter housing 51 are made of plastic with poor elasticity. When repairing the throttle valve 163 and the ignition device 17 in the recessed area 55, the intake pipe 54 is obstructed by the headpipe 61 and the air filter housing 51 after disassembly, and cannot be directly removed from the recessed area 55. It is necessary to separate the intake pipe from the headpipe 61, disassemble the headpipe 61, and then disassemble the air filter 500 before the components in the recessed area 55 can be repaired, which makes repair inconvenient.

[0047] In the embodiments of this application, since the intake pipe 54 is made of rubber, which has high elasticity, the intake pipe 54 is not limited by the shape and size of the intake pipe 54 between the head pipe 61 and the air filter housing 51. Thus, the intake pipe 54 can be detached from the head pipe 61. When components such as the ignition device 17 or the throttle valve 163 located in the recessed area 55 need maintenance, the intake pipe 54 can be detached without removing the head pipe 61, so as to maintain the components that need maintenance in the recessed area 55.

[0048] One end of the intake pipe 54 is connected to the headpipe 61, which has a ram air intake duct 611 for air intake. One end of the ram air intake duct 611 is connected to the outside, and the other end is connected to the intake pipe 54. The end of the ram air intake duct 611 connected to the outside generally faces the front of the vehicle frame. During driving, the ram air intake duct 611 can compress air and deliver it to the air filter 500, increasing the air density entering the air filter 500, thereby increasing the intake volume and improving the power of the engine 100. In this embodiment, the intake pipe 54 covers the ignition device 17, so the ignition device 17 can be maintained simply by removing the intake pipe 54.

[0049] As one implementation, the air filter housing 51 has an air filter inlet 511 that connects to the air filter space 53, and the air filter inlet 511 is inclined downwards. It should be noted that the downward inclination means that the angle between the extension direction of the air filter inlet 511 and the front and bottom of the frame 600 are both acute angles. One end of the intake pipe 54 is connected to the air filter inlet 511. The intake pipe 54 is arc-shaped and extends towards the head tube 61. The other end of the intake pipe 54 is connected to the ram air intake duct 611, and the opening of the end of the intake pipe 54 connected to the air filter inlet 511 is smaller than the opening of the end of the intake pipe 54 connected to the ram air intake duct 611.

[0050] Specifically, the air filter 500 includes an air filter cover 52, which is detachably mounted on the air filter housing 51 and covers the air filter space 53 from above the vehicle frame. The intake pipe 54 is detachably connected to the air filter housing 51. When maintenance is required on components in the recessed area 55, the air filter cover 52 is removed from the air filter housing 51, allowing operation at the connection between the air filter inlet 511 and the headpipe 61. This allows the intake pipe 54 to be detached from the headpipe 61 and the air filter housing 51. Since the intake pipe 54 is made of rubber, portions of the intake pipe 54 with a profile larger than the air filter inlet 511 can be removed through the air filter inlet 511, facilitating maintenance of components in the recessed area 55. This improves maintenance convenience and saves maintenance time.

[0051] like Figure 5As shown, in one implementation, the intake pipe 54 includes a rubber air guide 541 and a plastic mounting part 542. The air guide 541 forms the main body of the intake pipe 54, and one side of the air guide 541 is snapped into the air filter housing 51, so that the space inside the air guide 541 is connected to the air filter inlet 511. The mounting part 542 is located on the side of the air guide 541 away from the air filter housing 51, and the mounting part 542 is distributed around the outer edge of the air guide 541. The mounting part 542 is fixedly connected to the head tube 61, wherein the fixed connection includes at least a bolt connection. Since the mounting part 542 is made of plastic, the intake pipe 54 is connected to the head tube 61 by the cooperation of the mounting part 542 and fasteners, thereby improving the stability of the air filter 500.

[0052] Furthermore, the mounting part 542 and the air guide part 541 are integrally formed by means of two-color injection molding, etc. The integrally formed mounting part 542 and air guide part 541 can be firmly connected to the head tube 61 and the air filter housing 51. Moreover, the connection between the mounting part 542 and the air guide part 541 has good sealing performance, preventing air from leaking from the connection between the mounting part 542 and the air guide part 541 when air enters the mounting part 542 and the air guide part 541.

[0053] Specifically, the air filter housing 51 has an air filter inlet 511 that communicates with the air filter space 53. The air filter inlet 511 communicates with the space inside the air guide section 541. The air filter housing 51 has a plurality of snap-fit ​​structures 516 distributed around the air filter inlet 511. The air guide section 541 is provided with a mating part 5411 corresponding to the snap-fit ​​structure 516, so that the snap-fit ​​structure 516 can pass through the mating part 5411 to fix the air guide section 541 to the air filter housing 51.

[0054] With the above setup, the intake pipe 54 can be removed from the head pipe 61 and the air filter housing 51 simply by removing the fasteners and disengaging the snap-fit ​​structure 516 from the mating part 5411, which improves the ease of disassembly.

[0055] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A powertrain, comprising: An engine, including a cylinder head on which an intake passage is formed; An air filter is connected to the air intake channel. The air filter includes an air filter housing and an air filter cover. The air filter housing forms an air filter space, and the air filter cover closes the air filter space. The air filter housing has an air filter inlet and an air filter outlet that are connected to the air filter space. The air filter space is characterized by having a drive mechanism, a first air guide pipe, and a second air guide pipe. One end of the first air guide pipe is connected to the air outlet of the air filter, and the other end of the first air guide pipe can be connected to or separated from the second air guide pipe. The second air guide pipe is installed on the drive mechanism and can move under the action of the drive mechanism, so that a gap is formed between the first air guide pipe and the second air guide pipe to allow air to flow.

2. The powertrain according to claim 1, characterized in that, Viewed from the direction of the air filter inlet, at least a portion of the air filter inlet is located between the first air guide tube and the second air guide tube.

3. The powertrain according to claim 2, characterized in that, Both the first air guide tube and the second air guide tube are tubular structures. The first air guide tube forms a first air guide channel, and the second air guide tube forms a second air guide channel. When viewed along the extension direction of the first air guide channel, the first air guide channel and the second air guide channel overlap.

4. The powertrain according to claim 1, characterized in that, When the engine speed is less than a set speed threshold, the second air guide pipe is separated from the first air guide pipe under the action of the drive mechanism; when the engine speed is greater than or equal to the set speed threshold, the second air guide pipe is connected to the first air guide pipe under the action of the drive mechanism.

5. The powertrain according to claim 4, characterized in that, The first air guide tube is integrally formed with the air filter housing.

6. The powertrain according to claim 1, characterized in that, The air filter space is provided with a pair of first air guide pipes and a pair of second air guide pipes corresponding to the pair of first air guide pipes. The pair of second air guide pipes are installed on the drive mechanism and can move synchronously under the action of the drive mechanism.

7. The powertrain according to claim 6, characterized in that, The drive mechanism includes a lead screw, a motor, and a support bracket. One end of the lead screw is connected to the bottom of the air filter housing and can rotate relative to the air filter housing. The other end of the lead screw is connected to the motor. The support bracket is sleeved on the lead screw. The opposite sides of the support bracket are respectively connected to a pair of second air guide pipes, and the support bracket is threadedly engaged with the lead screw.

8. The powertrain according to claim 7, characterized in that, The drive mechanism also includes a transmission bracket that is threadedly engaged with the lead screw. If there are two or more pairs of second air guide pipes in the air filter space, each pair of second air guide pipes is connected by a receiving bracket, and the transmission bracket is connected to the receiving bracket of each of the two pairs of second air guide pipes.

9. The powertrain according to claim 7, characterized in that, The driving mechanism includes a rod-shaped limiting member, the extension direction of which is parallel to the extension direction of the lead screw, and the receiving bracket is sleeved on the limiting member and has a clearance fit with the limiting member.

10. The powertrain according to claim 7, characterized in that, The driving mechanism includes a rod-shaped limiting member, which is fixed to the air filter housing and passes through the receiving bracket. The extending direction of the limiting member is parallel to the extending direction of the lead screw.

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