Silencing ring gap control method, supercharger and vehicle

Abstract

The invention belongs to the technical field of engines, and discloses a silencing ring gap control method, a supercharger and a vehicle. The silencing ring gap control method comprises the steps that an engine universal working condition MAP is obtained, the engine universal working condition MAP is the corresponding relation between the working condition of an engine and a target silencing ring gap, and the working condition of the engine comprises the rotating speed of the engine and the torque of the engine; acquiring the current working condition of the engine; and determining a target silencing ring gap based on the current working condition of the engine and the MAP graph of the universal working condition of the engine. The noise reduction ring gap control method can provide a reference standard for adjustment of the noise reduction ring gap of the supercharger.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and in particular to a muffler ring gap control method, a supercharger and a vehicle. Background Art

[0002] The turbocharger includes a compressor casing inlet outer pipe and a compressor casing inlet inner pipe which are coaxially and spaced apart, and an air flow channel is formed between the two. An air intake channel is formed inside the compressor casing inlet inner pipe, and the air intake and air outlet of the air flow channel are both connected to the air intake channel. The turbocharger will produce a whistling sound when the engine is in a high-load condition. In order to solve the problem of turbocharger whistling noise, a silencer ring is usually configured in the turbocharger. The silencer ring is a circular ring structure arranged on the inner side of the compressor casing inlet outer pipe of the turbocharger. The silencer ring gap is the axial distance between the silencer ring and the outer end face of the compressor casing inlet inner pipe. The flow expansion flow channel is a through groove opened on the compressor casing inlet inner pipe, and serves as the air intake of the air flow channel, connecting the air intake cavity and the air flow channel, which can widen the flow and reduce the noise when the air flow enters the air flow channel.

[0003] In the prior art, the supercharger howling noise can be adjusted by adjusting the gap of the silencer ring, but it depends on the driver's actual feeling of the noise and lacks a reasonable basis for adjustment. In addition, during the adjustment, the gap of the silencer ring is adjusted only according to the actual size of the noise, while the consideration of the performance of the whole vehicle is ignored, which will cause a significant decrease in vehicle performance under some working conditions and affect the normal operation of the vehicle.

[0004] Therefore, there is an urgent need for a muffler ring gap control method, a supercharger and a vehicle to solve the above problems. Summary of the invention

[0005] According to one aspect of the present invention, an object is to provide a muffler ring gap control method, which can provide a reference standard for adjusting the muffler ring gap of a supercharger.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A silencer ring gap control method is capable of adjusting the silencer ring gap of a supercharger, wherein the supercharger comprises a compressor air intake outer pipe, a compressor air intake inner pipe and a silencer ring, wherein the compressor air intake outer pipe gap is sleeved outside the compressor air intake inner pipe, an air flow channel is formed between the compressor air intake outer pipe and the compressor air intake inner pipe, the silencer ring is movably connected to the compressor air intake outer pipe, the silencer ring and the compressor air intake inner pipe are spaced apart along the axial direction of the compressor air intake outer pipe, and the silencer ring gap is formed between the two, and the silencer ring gap is communicated with the air flow channel; the silencer ring gap control method comprises:

[0008] S100: Obtaining a universal operating condition MAP diagram of the engine, wherein the universal operating condition MAP diagram of the engine is a correspondence between an operating condition of the engine and a target silencer ring gap, wherein the operating condition of the engine includes an engine speed and an engine torque;

[0009] S200: Acquire the current engine operating condition;

[0010] S300: Determine a target silencer ring gap based on the current engine operating condition and the engine universal operating condition MAP.

[0011] As a preferred solution of the muffler ring gap control method provided by the present invention, in step S100, obtaining the engine universal operating condition MAP diagram includes:

[0012] S1: adjusting the silencer ring gap to the upper limit of the gap, and testing the supercharger noise under different engine operating conditions, wherein the engine operating condition corresponding to the part of the supercharger noise obtained that is lower than the noise limit is defined as a first operating condition set, and the engine operating condition corresponding to the part of the supercharger noise obtained that is not lower than the noise limit is defined as a second operating condition set;

[0013] S2: setting the target silencer ring clearance corresponding to each engine operating condition in the first operating condition set as the clearance upper limit;

[0014] S3: adjusting the silencer ring gap to the gap lower limit, and testing the supercharger noise under each engine operating condition in the second operating condition set, and defining the engine operating condition corresponding to the part of the acquired supercharger noise that is lower than the noise limit as the third operating condition set;

[0015] S4: Obtain and compare the weight of vehicle noise and the weight of vehicle performance;

[0016] If the weight of the vehicle noise exceeds the weight of the vehicle performance, execute S5;

[0017] S5: setting the target silencer ring clearance corresponding to each engine operating condition in the third operating condition set as the clearance lower limit.

[0018] As a preferred solution of the muffler ring gap control method provided by the present invention, in S4, if the weight of the vehicle noise does not exceed the weight of the vehicle performance, S6 is executed;

[0019] S6: adjusting the silencer ring gap to the upper limit of the gap, and testing the first performance of the engine under each engine operating condition in the third operating condition set;

[0020] S7: adjusting the silencer ring gap to the lower limit of the gap, and testing the second performance of the engine under each engine operating condition in the third operating condition set;

[0021] S8: determining a performance change amount based on the first performance and the second performance of each engine operating condition in the third operating condition set;

[0022] S9: The target muffler ring gap corresponding to each engine operating condition where the concentrated performance change amount of the third operating condition is less than the set change amount is set as the lower limit of the gap; the target muffler ring gap corresponding to each engine operating condition where the concentrated performance change amount of the third operating condition is not less than the set change amount is set as the upper limit of the gap.

[0023] According to another aspect of the present invention, the object is to provide a supercharger, which can adjust the silencer ring gap based on the silencer ring gap control method as described in any of the above schemes; the supercharger includes a compressor air inlet outer pipe, a compressor air inlet inner pipe and a silencer ring, the compressor air inlet outer pipe gap is sleeved outside the compressor air inlet inner pipe, the air flow channel is formed between the compressor air inlet outer pipe and the compressor air inlet inner pipe, the silencer ring is movably connected to the compressor air inlet outer pipe, the silencer ring and the compressor air inlet inner pipe are spaced apart along the axial direction of the compressor air inlet outer pipe, and the silencer ring gap is formed between the two, and the silencer ring gap is connected to the air flow channel.

[0024] As a preferred embodiment of the supercharger provided by the present invention, the silencer ring is coaxially arranged with the compressor air intake inner tube, an air intake channel is formed in the compressor air intake inner tube, and the silencer ring gap connects the air intake channel and the air flow channel; the supercharger also includes an actuator, which is transmission-connected to the silencer ring, and the silencer ring can move axially along the compressor air intake inner tube under the drive of the actuator to adjust the silencer ring gap.

[0025] As a preferred solution of the supercharger provided by the present invention, the muffler ring can move along the axial direction of the compressor intake inner pipe under the drive of the actuator and has a clearance lower limit position and a clearance upper limit position;

[0026] The actuator includes a driving member and an elastic element. The driving member is arranged on the compressor air inlet outer pipe and is transmission-connected to the silencer ring. The driving member can drive the silencer ring to move toward the upper limit position of the gap. The elastic element is configured to make the silencer ring always have a tendency to move toward the lower limit position of the gap.

[0027] As a preferred solution of the supercharger provided by the present invention, the actuator further includes a pressure sensor, and the pressure sensor is used to detect the elastic force of the elastic element.

[0028] As a preferred solution of the supercharger provided by the present invention, the driving member includes a cylinder body, a piston and a plurality of piston rods, the cylinder body and the piston are both annular structures, the cylinder body is arranged in the compressor intake outer pipe, the piston is slidably arranged in the cylinder body, each of the piston rods is connected to the piston, and each of the piston rods is connected to the silencer ring, and the plurality of piston rods are evenly and spacedly distributed along the circumference of the compressor intake outer pipe;

[0029] The actuator includes a plurality of elastic elements, and the plurality of elastic elements are evenly and spacedly distributed along the circumference of the compressor air inlet outer pipe.

[0030] As a preferred solution of the supercharger provided by the present invention, the supercharger includes a plurality of the actuators, and the plurality of the actuators are spaced and evenly distributed along the circumference of the compressor intake outer pipe.

[0031] According to another aspect of the present invention, an object is to provide a vehicle, comprising an engine and a supercharger as described in any of the above schemes, wherein an inner cavity of the engine is connected to the supercharger.

[0032] Beneficial effects of the present invention:

[0033] The muffler ring gap control method provided by the present invention is performed in sequence: obtaining the engine universal working condition MAP diagram, the engine universal working condition MAP diagram is the corresponding relationship between the engine working condition and the target muffler ring gap, and the engine working condition includes the engine speed and the engine torque; obtaining the current engine working condition; determining the target muffler ring gap based on the current engine working condition and the engine universal working condition MAP diagram. By obtaining the engine universal working condition MAP diagram, a reference standard is provided for adjusting the muffler ring gap of the supercharger. Through the current engine working condition and the engine universal working condition MAP diagram, the muffler ring gap in the supercharger of the engine in the engine working condition to be tested can be adjusted, and the noise reduction requirements of the supercharger and the engine performance requirements can be balanced.

[0034] The supercharger provided by the present invention adjusts the silencer ring gap based on the silencer ring gap control method mentioned above.

[0035] The vehicle provided by the present invention utilizes the supercharger provided by the present invention to realize the air intake of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a cross-sectional view of a partial structure of a supercharger provided in Embodiment 1 of the present invention;

[0037] Figure 2 is a flow chart of a method for controlling the gap of a muffler ring provided in Embodiment 2 of the present invention;

[0038] Figure 3 It is the engine universal operating condition MAP diagram provided in the second embodiment of the present invention.

[0039] In the figure:

[0040] 100. compressor air inlet outer pipe; 110. air flow channel;

[0041] 200, compressor air intake inner pipe; 210, air intake passage; 220, flow widening flow passage;

[0042] 300, silencer ring;

[0043] 400, actuator; 410, cylinder body; 420, piston rod; 430, elastic element; 440, control valve; 450, pressure sensor; 460, air inlet pipe; 470, air outlet pipe;

[0044] 500. Exhaust volute; 510. Vortex space. DETAILED DESCRIPTION

[0045] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0046] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0048] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0049] Embodiment 1

[0050] This embodiment provides a supercharger and a vehicle. The vehicle includes an engine and the supercharger provided by this embodiment. The supercharger can provide compressed air for the engine.

[0051] Figure 1 A cross-sectional view showing a partial structure of a supercharger provided by Embodiment 1 of the present invention. Figure 1 The supercharger provided in this embodiment includes an air intake section. The air intake section includes a compressor air intake outer pipe 100, a compressor air intake inner pipe 200 and a muffler ring 300. The compressor air intake inner pipe 200 is arranged in the compressor air intake outer pipe 100 at intervals to form an air flow channel 110. The air intake channel 210 is formed inside the compressor air intake inner pipe 200, and the outlet of the air flow channel 110 is connected to the inlet end of the air intake channel 210. Preferably, the compressor air intake inner pipe 200 is provided with a flow widening flow channel 220, and the flow widening flow channel 220 connects the air flow channel 110 and the air intake channel 210, serving as the inlet of the air flow channel 110. By setting the flow widening flow channel 220, the flow range of the low intake flow area can be widened.

[0052] The air intake part also includes an actuator 400, which is arranged on the compressor air intake outer pipe 100, and the actuator 400 is transmission-connected to the muffler ring 300, and the muffler ring 300 is coaxially arranged with the compressor air intake inner pipe 200 to form a muffler ring gap, and the muffler ring gap is connected to the air flow channel 110. The muffler ring 300 can move along the axial direction of the compressor air intake inner pipe 200 under the drive of the actuator 400 and has a gap lower limit position and a gap upper limit position. By setting the muffler ring 300, it can play a guiding role, making the airflow flow field more smooth and stable, thereby reducing part of the aerodynamic noise. By setting the flow widening channel 220, it can also be used in conjunction with the muffler ring 300, and can also weaken the medium and low frequency surge noise to a certain extent.

[0053] The supercharger also includes a diffuser outlet portion, which is arranged downstream of the air intake portion and connected to the inner cavity of the engine, specifically the intake manifold of the engine, and can diffuse the airflow from the air intake portion and introduce it into the intake manifold of the engine.

[0054] Specifically, the diffuser outlet portion includes an outlet volute 500, which is coaxially fixed to the downstream of the compressor inlet outer pipe 100 and connected to the inlet passage 210 and the inlet manifold of the engine. The supercharger also includes a rotor (not shown), which extends into the diffuser outlet portion and is coaxially arranged with the outlet volute 500. An annular gap connected to the inlet passage 210 is formed between the outlet volute 500 and the blades of the rotor, and the annular gap is connected to the vortex space 510 inside the outlet volute 500. The outlet volute 500 is connected to the compressor outlet duct, and the compressor outlet duct can introduce the compressed air from the outlet volute 500 into the inlet manifold of the engine.

[0055] More specifically, the actuator 400 includes a driving member and an elastic element 430. The driving member is disposed on the compressor air inlet outer pipe 100 and is transmission-connected to the silencer ring 300. The driving member can drive the silencer ring 300 to move toward the upper limit position of the gap. The elastic element 430 is configured to ensure that the silencer ring 300 always has a tendency to move toward the lower limit position of the gap.

[0056] More specifically, the driving member includes a cylinder 410, which is provided with a telescopic rod, and the telescopic rod can be telescopic relative to the cylinder 410. The cylinder 410 is fixedly arranged on the compressor intake outer pipe 100, and the muffler ring 300 is connected to the telescopic rod. The elastic element 430 is arranged along the axial direction of the compressor intake outer pipe 100, and is connected between the muffler ring 300 and the fixed part on the compressor casing of the supercharger. In this embodiment, the fixed part on the compressor casing can be a boss integrated into the compressor casing and arranged directly opposite to the cylinder 410, and the boss can serve as abutment reference for the elastic element 430. The muffler ring 300 can be driven away from the compressor intake inner pipe 200 by the axial movement of the telescopic rod along the compressor intake outer pipe 100. The muffler ring 300 can also be driven close to the compressor intake inner pipe 200 by the elastic recovery action of the elastic element 430. The cylinder body 410 may be a pneumatic cylinder, a hydraulic cylinder or an electric cylinder. In the present embodiment, the cylinder body 410 is specifically a pneumatic cylinder, and the telescopic rod includes a piston and a piston rod 420 disposed on the piston.

[0057] Preferably, the actuator 400 further includes a control valve 440. The air inlet of the rodless chamber of the cylinder body 410 is connected to the air source through an air inlet pipe 460, and the control valve 440 is arranged on the air inlet pipe 460. The control valve 440 can control the amount of air entering the rodless chamber from the air source, thereby changing the pressure of the rodless chamber of the cylinder body 410. The rodless chamber of the cylinder body 410 is also provided with an air outlet pipe 470, and the air outlet pipe 470 can discharge the gas in the rodless chamber of the cylinder body 410. The air inlet pipe 460 and the air outlet pipe 470 are arranged at a distance.

[0058] When the pressure in the rodless cavity of the cylinder body 410 is equal to the elastic force of the elastic element 430, the silencer ring 300 remains stationary relative to the compressor air inlet inner tube 200; when the pressure in the rodless cavity of the cylinder body 410 is greater than the elastic force of the elastic element 430, the silencer ring 300 can be pushed away from the air inlet end of the compressor air inlet inner tube 200, thereby increasing the silencer ring gap; when the pressure in the rodless cavity of the cylinder body 410 is less than the elastic force of the elastic element 430, the elastic element 430 can push the silencer ring 300 close to the air inlet end of the compressor air inlet inner tube 200, thereby reducing the silencer ring gap.

[0059] More specifically, the supercharger further includes a control mechanism, which is communicatively connected to the control valve 440 and can control the opening of the control valve 440, thereby controlling the amount of gas entering the rodless chamber of the cylinder 410, so as to control the distance that the piston extends out of the cylinder 410. In this embodiment, the control mechanism can be specifically integrated into the vehicle electronic controller.

[0060] Continue to refer to Figure 1 The actuator 400 further includes a pressure sensor 450. The pressure sensor 450 is disposed at a fixed portion on the compressor casing, and one end of the elastic element 430 is connected to the pressure sensor 450. The pressure sensor 450 is communicatively connected to the control mechanism, and the pressure sensor 450 can detect the elastic force of the elastic element 430. The control mechanism can receive the elastic force signal and calculate the deformation of the elastic element 430 according to the elastic force of the elastic element 430. The deformation of the elastic element 430 is equal to the adjustment amount of the silencer ring gap.

[0061] Preferably, in this embodiment, the driving member includes a plurality of piston rods 420. The cylinder body 410 and the piston are both annular structures, the cylinder body 410 is arranged on the compressor air intake outer tube 100, the piston is slidably arranged in the cylinder body 410, each of the piston rods 420 is connected to the piston, and each of the piston rods 420 is connected to the muffler ring 300, and the plurality of piston rods 420 are evenly and spacedly distributed along the circumference of the compressor air intake outer tube 100. The actuator 400 includes a plurality of elastic elements 430, and the plurality of elastic elements 430 are evenly and spacedly distributed along the circumference of the compressor air intake outer tube 100. Through the above arrangement, the stability of the muffler ring 300 when moving relative to the air intake end of the compressor air intake inner tube 200 can be improved, and the plurality of output parts act simultaneously, which can ensure the uniformity of the muffler ring gap adjustment in the circumference of the muffler ring 300. Specifically, the elastic element 430 is a compression spring, and the elastic element 430 and the piston rod 420 are respectively arranged on both sides of the muffler ring 300. In other embodiments, the elastic element 430 can also be replaced by a tension spring or the like; or, the elastic element 430 can also be arranged in the rod cavity in the cylinder body 410, and the elastic element 430 is used to drive the piston to move.

[0062] As an alternative, there may be multiple actuators 400. The cylinders 410 of the multiple actuators 400 are spaced and evenly distributed along the circumference of the compressor intake outer pipe 100. Each cylinder is provided with an intake pipe 460 and an outlet pipe 470, and a control valve 440 is arranged in the intake pipe, and the control mechanism can control the opening of multiple control valves 440 at the same time.

[0063] Embodiment 2

[0064] Figure 2 The flowchart of the method for controlling the gap of the muffler ring provided by the second embodiment of the present invention is shown. Figure 2 This embodiment provides a method for controlling the gap of a muffler ring. The method for controlling the gap of a muffler ring provided in this embodiment can be used to adjust the gap of the muffler ring of the supercharger provided in the first embodiment.

[0065] The muffler ring gap control method comprises:

[0066] S100: Obtaining a universal operating condition MAP diagram of the engine, wherein the universal operating condition MAP diagram of the engine is a correspondence between an operating condition of the engine and a target silencer ring gap, wherein the operating condition of the engine includes an engine speed and an engine torque;

[0067] S200: Acquire the current engine operating condition;

[0068] S300: Determine a target silencer ring gap based on the current engine operating condition and the engine universal operating condition MAP.

[0069] Specifically, in step S100, obtaining the engine universal operating condition MAP diagram includes:

[0070] S1: adjusting the silencer ring gap to the upper limit of the gap, and testing the supercharger noise under different engine operating conditions, wherein the engine operating condition corresponding to the part of the supercharger noise obtained that is lower than the noise limit is defined as a first operating condition set, and the engine operating condition corresponding to the part of the supercharger noise obtained that is not lower than the noise limit is defined as a second operating condition set;

[0071] S2: setting the target silencer ring clearance corresponding to each engine operating condition in the first operating condition set as the clearance upper limit;

[0072] S3: adjusting the silencer ring gap to the gap lower limit, and testing the supercharger noise under each engine operating condition in the second operating condition set, and defining the engine operating condition corresponding to the part of the acquired supercharger noise that is lower than the noise limit as the third operating condition set;

[0073] S4: Obtain and compare the weight of vehicle noise and the weight of vehicle performance;

[0074] If the weight of the vehicle noise exceeds the weight of the vehicle performance, execute S5;

[0075] S5: setting the target silencer ring clearance corresponding to each engine operating condition in the third operating condition set as the clearance lower limit.

[0076] Specifically, in the above step S4, if the weight of the vehicle noise does not exceed the weight of the vehicle performance, then execute S6;

[0077] S6: adjusting the silencer ring gap to the upper limit of the gap, and testing the first performance of the engine under each engine operating condition in the third operating condition set;

[0078] S7: adjusting the silencer ring gap to the lower limit of the gap, and testing the second performance of the engine under each engine operating condition in the third operating condition set;

[0079] S8: determining a performance change amount based on the first performance and the second performance of each engine operating condition in the third operating condition set;

[0080] S9: The target muffler ring gap corresponding to each engine operating condition where the concentrated performance change amount of the third operating condition is less than the set change amount is set as the lower limit of the gap; the target muffler ring gap corresponding to each engine operating condition where the concentrated performance change amount of the third operating condition is not less than the set change amount is set as the upper limit of the gap.

[0081] It should be noted that in S1, testing the supercharger noise under different engine operating conditions refers to testing the universal operating conditions in sequence. The universal operating conditions are specifically: a preset engine speed test interval and an engine torque test interval. For each engine speed in the engine speed test interval, it is sequentially combined with each torque in the engine torque test interval to form a number of engine operating conditions. All engine operating conditions constitute the universal operating conditions.

[0082] In S2, obtaining the current working condition refers to collecting the current speed of the engine and the current torque of the engine. The current speed of the engine can be detected by a speed sensor, and the current torque of the engine can be detected by a torque sensor.

[0083] The weight of vehicle noise and the weight of vehicle performance can be set according to the specific application of the vehicle, or the driver's preference for noise and performance. For example, if the driver pays more attention to the performance of the vehicle than the noise of the vehicle, the weight of the vehicle noise does not exceed the weight of the vehicle performance. At this time, the weight of the vehicle noise can be set to 0, and the weight of the vehicle performance is set to 1. When the supercharger noise exceeds the noise limit, it is necessary to reduce the gap of the silencer ring to improve the noise of the supercharger; if the driver pays more attention to the noise of the vehicle than the performance of the vehicle, the weight of the vehicle noise exceeds the weight of the vehicle performance. At this time, the weight of the vehicle noise can be set to 1, and the weight of the vehicle performance is set to 0. When the supercharger noise exceeds the noise limit, it is necessary to reduce the gap of the silencer ring to improve the noise of the supercharger while ensuring that the performance of the vehicle will not be greatly reduced. This can meet the different needs of the driver.

[0084] The above performance change amount can specifically be the ratio of the difference between the second performance and the first performance to the first performance. The above first performance and second performance can be parameters such as the output torque, rotation speed and / or fuel consumption of the engine. Taking the output torque as an example of the engine performance data, the output torque of the engine can be detected by a torque sensor, and the performance change amount is the ratio of the change in the engine output torque before and after the silencer ring gap is adjusted to the engine output torque before the silencer ring gap is adjusted.

[0085] Through the above steps, the engine universal working condition MAP diagram is obtained, such as Figure 3 As shown, Figure 3 The engine universal operating condition MAP diagram when the weight of vehicle noise exceeds the weight of vehicle performance is shown in the figure, wherein the shaded portion represents the target silencer ring gap corresponding to each engine operating condition in the third operating condition set. This part of the target silencer ring gap is specifically the lower limit of the gap. At this time, the supercharger noise will not exceed the noise limit, satisfying the driver's preference of paying more attention to vehicle noise. Figure 3 The blank part of represents the target silencer ring gap corresponding to each engine operating condition in the first operating condition set. This part of the target silencer ring gap is specifically the upper limit of the gap. At this time, the supercharger noise will not exceed the noise limit and can ensure the optimal performance of the vehicle.

[0086] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for controlling a silencer ring gap, capable of adjusting a silencer ring gap of a supercharger, wherein the supercharger comprises a compressor air intake outer pipe (100), a compressor air intake inner pipe (200) and a silencer ring (300), wherein the compressor air intake outer pipe (100) is sleeved outside the compressor air intake inner pipe (200), an air flow channel (110) is formed between the compressor air intake outer pipe (100) and the compressor air intake inner pipe (200), and the silencer ring (300) is movably connected to the compressor air intake outer pipe (100), and the silencer ring (300) and the compressor air intake inner pipe (200) are spaced apart from each other along the axial direction of the compressor air intake outer pipe (100), and the silencer ring gap is formed between the two, and the silencer ring gap is communicated with the air flow channel (110); characterized in that: The muffler ring gap control method comprises: S100: Obtaining a universal operating condition MAP diagram of the engine, wherein the universal operating condition MAP diagram of the engine is a correspondence between an operating condition of the engine and a target silencer ring gap, wherein the operating condition of the engine includes an engine speed and an engine torque; S200: Acquire the current engine operating condition; S300: Determine a target silencer ring gap based on the current engine operating condition and the engine universal operating condition MAP.

2. The method for controlling the gap of a muffler ring according to claim 1, characterized in that: In step S100, obtaining the engine universal operating condition MAP diagram includes: S1: adjusting the silencer ring gap to the upper limit of the gap, and testing the supercharger noise under different engine operating conditions, wherein the engine operating condition corresponding to the part of the supercharger noise obtained that is lower than the noise limit is defined as a first operating condition set, and the engine operating condition corresponding to the part of the supercharger noise obtained that is not lower than the noise limit is defined as a second operating condition set; S2: setting the target silencer ring clearance corresponding to each engine operating condition in the first operating condition set as the clearance upper limit; S3: adjusting the silencer ring gap to the gap lower limit, and testing the supercharger noise under each engine operating condition in the second operating condition set, and defining the engine operating condition corresponding to the part of the acquired supercharger noise that is lower than the noise limit as the third operating condition set; S4: Obtain and compare the weight of vehicle noise and the weight of vehicle performance; If the weight of the vehicle noise exceeds the weight of the vehicle performance, execute S5; S5: setting the target silencer ring clearance corresponding to each engine operating condition in the third operating condition set as the clearance lower limit.

3. The muffler ring gap control method according to claim 1, characterized in that: In S4, if the weight of the vehicle noise does not exceed the weight of the vehicle performance, then execute S6; S6: adjusting the silencer ring gap to the upper limit of the gap, and testing the first performance of the engine under each engine operating condition in the third operating condition set; S7: adjusting the silencer ring gap to the lower limit of the gap, and testing the second performance of the engine under each engine operating condition in the third operating condition set; S8: determining a performance change amount based on the first performance and the second performance of each engine operating condition in the third operating condition set; S9: setting the target silencer ring clearance corresponding to each engine operating condition in which the concentrated performance change amount of the third operating condition is less than the set change amount as the clearance lower limit; The target silencer ring clearance corresponding to each engine operating condition in which the concentrated performance change amount of the third operating condition is not less than the set change amount is set as the clearance upper limit.

4. A supercharger, characterized in that: The supercharger can adjust the silencer ring gap based on the silencer ring gap control method according to any one of claims 1 to 3; the supercharger comprises a compressor air intake outer pipe (100), a compressor air intake inner pipe (200) and a silencer ring (300); the compressor air intake outer pipe (100) is gap-sheathed outside the compressor air intake inner pipe (200); the air flow channel (110) is formed between the compressor air intake outer pipe (100) and the compressor air intake inner pipe (200); the silencer ring (300) is movably connected to the compressor air intake outer pipe (100); the silencer ring (300) and the compressor air intake inner pipe (200) are spaced apart from each other along the axial direction of the compressor air intake outer pipe (100), and the silencer ring gap is formed between the two, and the silencer ring gap is connected to the air flow channel (110).

5. The supercharger according to claim 4, characterized in that: The silencer ring (300) is coaxially arranged with the compressor air intake inner tube (200), an air intake channel (210) is formed in the compressor air intake inner tube (200), and the silencer ring gap connects the air intake channel (210) and the air flow channel (110); the supercharger also includes an actuator (400), the actuator (400) is transmission-connected to the silencer ring (300), and the silencer ring (300) can move along the axial direction of the compressor air intake inner tube (200) under the drive of the actuator (400) to adjust the silencer ring gap.

6. The supercharger according to claim 5, characterized in that: The silencer ring (300) can be moved along the axial direction of the compressor air intake inner pipe (200) under the drive of the actuator (400) to have a clearance lower limit position and a clearance upper limit position; The actuator (400) comprises a driving member and an elastic element (430), wherein the driving member is arranged on the compressor air inlet outer pipe (100) and is transmission-connected to the silencer ring (300), wherein the driving member can drive the silencer ring (300) to move toward the upper limit position of the gap, and the elastic element (430) is configured to ensure that the silencer ring (300) always has a tendency to move toward the lower limit position of the gap.

7. The supercharger according to claim 6, characterized in that: The actuator (400) further comprises a pressure sensor (450), wherein the pressure sensor (450) is used to detect the elastic force of the elastic element (430).

8. The supercharger according to claim 6, characterized in that: The driving member comprises a cylinder body (410), a piston and a plurality of piston rods (420); the cylinder body (410) and the piston are both annular structures; the cylinder body (410) is arranged on the compressor air intake outer pipe (100); the piston is slidably arranged in the cylinder body (410); each of the piston rods (420) is connected to the piston, and each of the piston rods (420) is connected to the silencer ring (300); and the plurality of piston rods (420) are evenly and spacedly distributed along the circumference of the compressor air intake outer pipe (100); The actuator (400) comprises a plurality of elastic elements (430), and the plurality of elastic elements (430) are evenly and spacedly distributed along the circumference of the compressor air inlet outer pipe (100).

9. The supercharger according to claim 5, characterized in that: The supercharger comprises a plurality of the actuators (400), and the plurality of the actuators (400) are spaced and evenly distributed along the circumference of the compressor air inlet outer pipe (100).

10. A vehicle, characterized in that It comprises an engine and a supercharger as claimed in any one of claims 4 to 9, wherein an inner cavity of the engine is connected to the supercharger.

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