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 noise reduction ring gap control method comprises the steps that a noise reduction ring gap calibration value is obtained based on the current engine working condition; the silencing ring is adjusted, so that the silencing ring gap is equal to the silencing ring gap calibration value; the calibration method of the noise reduction ring gap calibration value comprises the steps that supercharger noise corresponding to different noise reduction ring gaps is tested under the working condition of a to-be-tested engine; and extracting the width value of the silencing ring gap when the noise is minimum under the working condition of the to-be-tested engine, calibrating the width value as the silencing ring gap calibration value under the working condition of the to-be-tested engine, and obtaining the corresponding relationship between the working condition of the engine and the silencing ring gap. According to the noise reduction ring gap control method, accurate control over the noise reduction ring gap can be achieved, the problem of supercharger noise caused by improvement of the engine performance is solved, and effective balance between the engine performance and noise control can be achieved.

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 inlet and the 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 muffler ring is usually configured in the turbocharger. The muffler ring is a circular ring structure arranged on the inner side of the compressor casing inlet outer pipe of the turbocharger. The muffler ring gap is the axial distance between the muffler ring and the outer end face of the compressor casing inlet inner pipe. The flow widening flow channel is a through groove opened on the compressor casing inlet inner pipe, and serves as the air inlet of the air flow channel, connecting the air intake cavity and the air flow channel, which can widen the flow and reduce the medium and low frequency noise when the air flow enters the air flow channel.

[0003] The prior art provides a supercharger system, which controls the air outlet of the air flow channel to be opened when the engine is in a low-load condition, and reduces the medium and low frequency noise at the outlet of the air flow channel by using the air flow to flow through the air outlet of the air flow channel and cut off the transmission of sound waves. When the engine is in a high-load condition, the air outlet of the air flow channel is controlled to be closed to prevent the air flow from flowing through the air outlet of the air flow channel, thereby reducing the high frequency noise at the outlet of the air flow channel.

[0004] The above-mentioned supercharger system can only achieve noise reduction under different engine operating conditions by opening and closing the air outlet of the air flow channel. However, it does not provide relevant balancing means for the impact of the noise control process on the supercharger performance, and cannot accurately reduce the noise while ensuring the performance, so as to achieve an effective balance between ensuring engine performance and noise reduction.

[0005] 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

[0006] According to one aspect of the present invention, an object is to provide a silencer ring gap control method, which can achieve accurate control of the silencer ring gap, solve the supercharger noise problem caused by improving engine performance, and achieve an effective balance between engine performance and noise control.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] A muffler ring gap control method is capable of adjusting the muffler ring gap of a supercharger, wherein the supercharger comprises a compressor casing and a muffler ring, wherein the compressor casing comprises a compressor air inlet outer pipe and a compressor air inlet inner pipe, wherein the muffler ring is connected to the compressor casing and is spaced from the compressor air inlet inner pipe along the axial direction of the compressor air inlet outer pipe to form the muffler ring gap; the muffler ring gap control method comprises:

[0009] Obtaining a muffler ring clearance calibration value based on current engine operating conditions;

[0010] Adjust the silencer ring so that the silencer ring gap is equal to the silencer ring gap calibration value;

[0011] Wherein, the calibration method of the calibrated value of the silencer ring gap includes:

[0012] The supercharger noise corresponding to different silencer ring gaps is tested under the engine working condition to be tested; the width value of the silencer ring gap is obtained when the noise is minimum under the engine working condition to be tested, and is calibrated as the silencer ring gap calibration value under the engine working condition to be tested; and the corresponding relationship between the engine working condition and the silencer ring gap is obtained.

[0013] Through the above settings, the calibration value of the silencer ring gap when the supercharger noise is minimum under the engine operating condition to be tested can be obtained. The calibration value of the silencer ring gap can provide a reference standard for the subsequent adjustment of the gap width of the silencer ring gap under the same engine operating condition, thereby effectively balancing the engine performance and supercharger noise control.

[0014] As a preferred solution of the muffler ring gap control method provided by the present invention, “adjusting the muffler ring gap to be equal to the muffler ring gap calibration value” includes:

[0015] The silencer ring is controlled in a closed loop so that the actual width value of the silencer ring gap is equal to the set width value.

[0016] Through the above arrangement, accurate control of the gap of the silencer ring can be achieved.

[0017] As a preferred solution of the muffler ring gap control method provided by the present invention, before "obtaining the muffler ring gap calibration value", it is confirmed that the engine is in a stable operation stage.

[0018] Through the above settings, the accuracy of obtaining the calibration value of the silencer ring gap can be improved.

[0019] According to another aspect of the present invention, the object is to provide a supercharger, the supercharger comprises a compressor casing and a muffler ring, the compressor casing comprises a compressor inlet outer pipe, a compressor inlet inner pipe and an outlet volute, the compressor inlet outer pipe and the outlet volute are coaxially fixedly arranged, the compressor inlet inner pipe is coaxially arranged in the compressor inlet outer pipe to form an airflow channel, the compressor inlet inner pipe forms an inlet channel, the compressor inlet inner pipe is provided with a flow widening flow channel, the flow widening flow channel connects the inlet channel and the airflow channel, the muffler ring is connected to the compressor casing, and is spaced from the compressor inlet inner pipe along the axial direction of the compressor inlet outer pipe to form a muffler ring gap, the flow widening flow channel is the inlet of the airflow channel, and the muffler ring gap is the outlet of the airflow channel;

[0020] The outlet volute is connected to the inner cavity of the engine and the air inlet passage, and can expand the airflow from the air inlet passage and introduce it into the inner cavity of the engine;

[0021] The supercharger adjusts the silencer ring gap based on the silencer ring gap control method as described in any of the above schemes. The supercharger also includes an actuator, which is arranged on the compressor casing. The silencer ring is connected to the actuator, and the actuator can drive the silencer ring to move to adjust the silencer ring gap.

[0022] Through the above arrangement, the silencer ring gap can be reliably adjusted by utilizing the actuator.

[0023] As a preferred solution of the supercharger provided by the present invention, the actuator includes a cylinder, a piston and an elastic element, the cylinder is arranged on the compressor casing, the silencer ring is connected to the piston, and the elastic element is arranged along the axial direction of the compressor intake outer pipe and connected between the piston and the fixing part on the compressor casing;

[0024] The silencer ring can be driven away from the compressor intake inner pipe by the axial movement of the piston along the compressor intake outer pipe;

[0025] The silencer ring can also be moved close to the compressor air inlet inner pipe driven by the elastic restoring action of the elastic element.

[0026] Through the above arrangement, with the cooperation of the cylinder, the piston and the elastic element, reliable adjustment of the position of the silencer ring can be achieved.

[0027] As a preferred solution of the supercharger provided by the present invention, the actuator also includes a control valve, which is arranged between the rodless chamber of the cylinder and the air source, and the control valve can control the amount of air entering the rodless chamber from the air source.

[0028] Through the above arrangement, the position of the muffler ring can be adjusted by controlling the opening of the control valve, and the displacement of the muffler ring can be converted into the air intake volume of the rodless chamber of the cylinder for control.

[0029] As a preferred solution of the supercharger provided by the present invention, the supercharger further includes a control mechanism, and the control mechanism is communicatively connected to the control valve and can control the opening of the control valve.

[0030] Through the above arrangement, the control mechanism can improve the accuracy of the control valve action and the accuracy of adjusting the position of the silencer ring.

[0031] As a preferred embodiment of the supercharger provided by the present invention, the actuator also includes a pressure sensor, which is arranged at a fixed part on the compressor casing, connected to the elastic element, and communicatively connected to the control mechanism. The pressure sensor can detect the elastic force of the elastic element, and can calculate the deformation of the elastic element according to the elastic force of the elastic element, and the deformation of the elastic element is equal to the adjustment amount of the silencer ring gap.

[0032] Through the above arrangement, the feedback of the silencer ring gap can be realized through the pressure sensor, thereby facilitating closed-loop control of the silencer ring gap.

[0033] As a preferred solution of the supercharger provided by the present invention, the cylinder is annular in structure, the piston includes a plurality of piston rods, the plurality of piston rods are arranged at intervals along the circumferential direction on the compressor intake outer pipe, and are all connected to the muffler ring;

[0034] There are multiple elastic elements, each of which corresponds to the multiple piston rods. The multiple elastic elements are arranged at intervals along the circumferential direction on the compressor intake outer pipe and are all connected to the silencer ring and the corresponding piston rod.

[0035] Through the above arrangement, the stability of the silencer ring when moving relative to the intake end of the compressor intake inner tube can be improved, and multiple output parts operate simultaneously, which can ensure the uniformity of the silencer ring gap adjustment in the circumferential direction of the silencer ring.

[0036] 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 exhaust volute.

[0037] Beneficial effects of the present invention:

[0038] The muffler ring gap control method provided by the present invention includes obtaining a muffler ring gap calibration value based on the current engine operating condition; adjusting the muffler ring so that the muffler ring gap is equal to the muffler ring gap calibration value. Among them, the calibration method of the muffler ring gap calibration value includes: in obtaining the muffler ring gap calibration value, including testing the supercharger noise corresponding to different muffler ring gaps under the engine operating condition to be tested; when the noise is minimum under the engine operating condition to be tested, the width value of the muffler ring gap is raised, and calibrated as the muffler ring gap calibration value under the engine operating condition to be tested; when the noise is minimum under the engine operating condition to be tested, the width value of the muffler ring gap is raised, and calibrated as the muffler ring gap calibration value under the engine operating condition to be tested, and the corresponding relationship between the engine operating condition and the muffler ring gap is obtained. A certain engine operating condition corresponds to a certain supercharger intake volume, and when the supercharger intake volume is different, the degree of noise emitted by the supercharger is different. Through the above steps, the calibration value of the silencer ring gap when the supercharger noise is the smallest under the engine working condition to be tested can be obtained, and the calibration value of the silencer ring gap can provide a reference standard for adjusting the gap width of the silencer ring gap under the same engine working condition in the future, thereby effectively balancing the engine performance and supercharger noise control. By adjusting the silencer ring, the supercharger noise can be reduced by adjusting the gap width of the silencer ring gap under the engine working condition to be tested, and the closed-loop control of engine performance and noise control can be achieved.

[0039] The supercharger provided by the present invention can adjust the silencer ring gap by using the silencer ring gap control method provided by the present invention, thereby effectively balancing the engine performance and the supercharger noise control.

[0040] 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

[0041] Figure 1 is a cross-sectional view of a partial structure of a supercharger provided in Embodiment 1 of the present invention;

[0042] Figure 2 It is a flow chart of the silencer ring gap control method provided in the second embodiment of the present invention.

[0043] In the figure:

[0044] 100, compressor casing; 110, compressor air inlet outer pipe; 120, compressor air inlet inner pipe; 121, flow widening flow channel; 130, air outlet volute; 140, air flow channel; 150, air inlet channel;

[0045] 200, silencer ring;

[0046] 300, actuator; 310, cylinder; 320, piston; 330, elastic element; 340, control valve; 350, pressure sensor; 360, air inlet pipe; 370, air outlet pipe. DETAILED DESCRIPTION

[0047] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0048] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0051] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0052] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] 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.

[0054] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0055] Embodiment 1

[0056] 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.

[0057] 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 a compressor casing 100 and a muffler ring 200. The compressor casing 100 includes a compressor air inlet outer pipe 110, a compressor air inlet inner pipe 120 and an air outlet volute 130. The compressor air inlet outer pipe 110 and the air outlet volute 130 are coaxially fixedly arranged. The compressor air inlet inner pipe 120 is coaxially arranged in the compressor air inlet outer pipe 110 to form an air flow channel 140, and an air inlet channel 150 is formed in the compressor air inlet inner pipe 120, and the outlet of the air flow channel 140 is connected to the inlet end of the air inlet channel 150. The compressor air inlet inner pipe 120 is provided with a flow widening flow channel 121, and the flow widening flow channel 121 connects the air inlet channel 150 and the air flow channel 140. The silencer ring 200 is connected to the compressor casing 100, and is spaced from the compressor intake inner tube 120 along the axial direction of the compressor intake outer tube 110 to form a silencer ring gap. The flow widening channel 121 is the entrance of the airflow channel 140, and the silencer ring gap is the outlet of the airflow channel 140. By setting the silencer ring 200, it can play a guiding role, making the airflow flow field smoother and more stable, thereby reducing some aerodynamic noise. By setting the flow widening channel 121, the flow range of the low intake flow area can be widened, and when used in conjunction with the silencer ring 200, the surge noise of the medium and low frequencies can also be weakened to a certain extent.

[0058] Specifically, the air outlet volute 130 is connected to the inner cavity of the engine and the air intake passage 150 , and can expand the airflow from the air intake passage 150 and introduce it into the inner cavity of the engine.

[0059] More specifically, the supercharger further includes a rotor (not shown). The rotor is located in the compressor housing 100 and is coaxially arranged with the outlet volute 130. An annular gap connected to the air inlet passage 150 is formed between the outlet volute 130 and the blades of the rotor, and the annular gap is connected to the internal space of the outlet volute 130. The outlet volute 130 is connected to a compressor outlet duct, which can guide the compressed air from the outlet volute 130 into the inner cavity of the engine.

[0060] Continue to refer to Figure 1 The supercharger further includes an actuator 300, which is disposed on the compressor housing 100, and the silencer ring 200 is connected to the actuator 300. The actuator 300 can drive the silencer ring 200 to move so as to adjust the silencer ring gap. The actuator 300 can be a cylinder piston mechanism or a hydraulic mechanism. In this embodiment, the actuator 300 is a cylinder piston mechanism.

[0061] Specifically, the actuator 300 includes a cylinder 310, a piston 320 and an elastic element 330. The cylinder 310 is disposed on the compressor housing 100. The muffler ring 200 is connected to the piston 320. The elastic element 330 is arranged along the axial direction of the compressor intake outer pipe 110 and connected between the piston 320 and the fixing portion on the compressor housing 100. In this embodiment, the fixing portion on the compressor housing 100 may be a boss integrated into the compressor housing 100 and arranged directly opposite to the cylinder 310. The boss can serve as a reference for the elastic element 330 to abut. The muffler ring 200 can be driven away from the compressor intake inner pipe 120 by the axial movement of the piston 320 along the compressor intake outer pipe 110. The muffler ring 200 can also be driven close to the compressor intake inner pipe 120 by the elastic recovery movement of the elastic element 330.

[0062] More specifically, the actuator 300 further includes a control valve 340. The air inlet of the rodless chamber of the cylinder 310 is connected to the air source through an air inlet pipe 360, and the control valve 340 is arranged in the air inlet pipe 360. The control valve 340 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 310. The rodless chamber of the cylinder 310 is also provided with an air outlet pipe 370, and the air outlet pipe 370 can discharge the gas in the rodless chamber of the cylinder 310. The air inlet pipe 360 ​​and the air outlet pipe 370 are arranged at a distance.

[0063] When the pressure in the rodless cavity of the cylinder 310 is equal to the elastic force of the elastic element 330, the silencer ring 200 remains stationary relative to the compressor air inlet inner tube 120; when the pressure in the rodless cavity of the cylinder 310 is greater than the elastic force of the elastic element 330, the silencer ring 200 can be pushed away from the air inlet end of the compressor air inlet inner tube 120, thereby increasing the silencer ring gap; when the pressure in the rodless cavity of the cylinder 310 is less than the elastic force of the elastic element 330, the elastic element 330 can push the silencer ring 200 close to the air inlet end of the compressor air inlet inner tube 120, thereby reducing the silencer ring gap.

[0064] More specifically, the supercharger further includes a control mechanism. The control mechanism is communicatively connected to the control valve 340, and can control the opening of the control valve 340, thereby controlling the amount of gas entering the rodless chamber of the cylinder 310, so as to control the distance that the piston extends out of the cylinder 310. In this embodiment, the control mechanism can be specifically integrated into the vehicle ECU electronic controller.

[0065] Continue to refer to Figure 1 The actuator 300 further includes a pressure sensor 350. The pressure sensor 350 is disposed at a fixed portion of the compressor casing 100, and one end of the elastic element 330 is connected to the pressure sensor 350. The pressure sensor 350 is communicatively connected to the control mechanism, and the pressure sensor 350 can detect the elastic force of the elastic element 330. The control mechanism can receive the elastic force signal and calculate the deformation of the elastic element 330 according to the elastic force of the elastic element 330. The deformation of the elastic element 330 is equal to the adjustment amount of the silencer ring gap.

[0066] Preferably, the cylinder 310 is annular in structure, and the piston 320 includes a plurality of piston rods, which are arranged at intervals along the circumference on the compressor intake outer pipe 110, and are all connected to the muffler ring 200. The intake pipe 360 ​​and the outlet pipe 370 are respectively arranged at the top and bottom of the annular cylinder. There are a plurality of elastic elements 330, which correspond to the plurality of piston rods one by one, and the plurality of elastic elements 330 are arranged at intervals along the circumference on the compressor intake outer pipe 110, and are all connected to the muffler ring 200 and the corresponding piston rods. Through the above arrangement, the stability of the muffler ring 200 when moving relative to the intake end of the compressor intake inner pipe 120 can be improved, and the plurality of output parts act simultaneously, which can ensure the uniformity of the muffler ring gap adjustment in the circumferential direction of the muffler ring 200.

[0067] In another embodiment, the cylinder 310 may be multiple, and the multiple cylinders 310 are evenly spaced along the circumferential direction and arranged on the compressor casing 100, and each cylinder 310 is correspondingly provided with a piston 320. Each cylinder is provided with an intake pipe 360 ​​and an outlet pipe 370, and the multiple intake pipes 360 are respectively arranged with control valves 340, and the control mechanism can control the opening of multiple control valves 340 at the same time.

[0068] Embodiment 2

[0069] 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.

[0070] The muffler ring gap control method comprises: obtaining a muffler ring gap calibration value based on the current engine operating condition; and adjusting the muffler ring 200 so that the muffler ring gap is equal to the muffler ring gap calibration value.

[0071] The calibration method of the silencer ring clearance calibration value includes:

[0072] First, make sure the engine is in stable operation.

[0073] Then, obtain the calibration value of the silencer ring gap: test the supercharger noise corresponding to different silencer ring gaps under the engine working condition to be tested; when the noise is minimum under the engine working condition to be tested, obtain the width value of the silencer ring gap, and calibrate it as the calibration value of the silencer ring gap under the engine working condition to be tested. A certain engine working condition corresponds to a certain supercharger intake volume. When the supercharger intake volume is different, the degree of noise emitted by the supercharger is different. Through the above steps, the calibration value of the silencer ring gap when the supercharger noise is minimum under the engine working condition to be tested can be obtained. The calibration value of the silencer ring gap can provide a reference standard for the adjustment of the width value of the silencer ring gap under the same engine working condition in the future, and then effectively balance the engine performance and supercharger noise control. , so as to achieve the best noise control effect under certain engine working conditions.

[0074] Finally, adjust the silencer ring gap: adjust the silencer ring gap width to be equal to the silencer ring gap calibration value. Through the above steps, the supercharger noise can be reduced by adjusting the gap width of the silencer ring gap under the engine working condition to be tested, and the closed-loop control of engine performance and noise control can be achieved.

[0075] Specifically, in the above steps, “adjusting the width value of the silencer ring gap to be equal to the calibrated value of the silencer ring gap” specifically includes performing closed-loop control on the silencer ring 200 so that the actual width value of the silencer ring gap is equal to the set width value, specifically including the following steps:

[0076] The actual width value of the silencer ring gap of the supercharger is obtained, and the relationship between the actual difference between the actual width value of the silencer ring gap and the calibrated value of the silencer ring gap and the preset difference is determined. If the actual difference is not greater than the preset difference, the actual width value of the silencer ring gap is maintained; otherwise, the actual width value of the silencer ring gap is adjusted to be equal to the calibrated value of the silencer ring gap. Through the above steps, after the gap width of the silencer ring gap is initially adjusted to the actual value of the silencer ring gap width, the error between the actual value of the silencer ring gap width and the calibrated value of the silencer ring gap can be adjusted again to ensure the accuracy of the gap width adjustment of the silencer ring gap.

[0077] More specifically, "obtaining the calibration value of the silencer ring gap" also includes: extracting and calibrating multiple silencer ring gap calibration values ​​under multiple engine operating conditions to be tested, and obtaining the correspondence between the engine operating conditions and the silencer ring gap. The correspondence between the engine operating conditions and the silencer ring gap can be a correspondence diagram or a correspondence table. Different engine operating conditions to be tested correspond to different silencer ring gap calibration values. By forming the correspondence between the engine operating conditions and the silencer ring gap, a reference can be provided for the subsequent adjustment of the silencer ring gap, so as to quickly know the silencer ring gap that can minimize the supercharger noise under certain operating conditions.

[0078] In this embodiment, the control mechanism mainly adjusts the gap of the muffler ring by controlling the actuator 300. In this embodiment, the control mechanism controls the opening of the control valve 340 to control the amount of gas entering the annular cylinder, thereby controlling the extension distance of the output part relative to the driving part, changing the compression amount of the elastic element 330, and thus achieving the adjustment of the gap of the muffler ring.

[0079] Therefore, the step of "obtaining the calibration value of the muffler ring gap" provided in the present embodiment also includes: under the engine operating condition to be tested, the control mechanism adjusts the muffler ring 200 to different positions by adjusting the control valve 340 to different openings, and simultaneously tests the supercharger noise, so as to calibrate the opening of the regulating control valve 340 corresponding to the calibration value of the muffler ring gap to the target opening under the engine operating condition to be tested.

[0080] The engine is operated to different working conditions to be tested in turn. According to the above method, the target opening of the control valve 340 under different engine working conditions to be tested is calibrated to form an engine working condition-control valve opening reference diagram, which can provide a reference for the opening selection of the control valve 340 in the subsequent adjustment of the silencer ring gap.

[0081] 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 casing (100) and a silencer ring (200), wherein the compressor casing (100) comprises a compressor air inlet outer pipe (110) and a compressor air inlet inner pipe (120), wherein the silencer ring (200) is connected to the compressor casing (100) and is spaced from the compressor air inlet inner pipe (120) along the axial direction of the compressor air inlet outer pipe (110) to form the silencer ring gap; and characterized in that: The muffler ring gap control method comprises: Obtaining a muffler ring clearance calibration value based on current engine operating conditions; Adjusting the silencer ring (200) so that the silencer ring gap is equal to the silencer ring gap calibration value; Wherein, the calibration method of the calibrated value of the silencer ring gap includes: The supercharger noise corresponding to different silencer ring gaps is tested under the engine working condition to be tested; the width value of the silencer ring gap is obtained when the noise is minimum under the engine working condition to be tested, and is calibrated as the silencer ring gap calibration value under the engine working condition to be tested; and the corresponding relationship between the engine working condition and the silencer ring gap is obtained.

2. The method for controlling the gap of a muffler ring according to claim 1, characterized in that: “Adjusting the width of the silencer ring gap to be equal to the calibrated value of the silencer ring gap” includes: The silencer ring (200) is subjected to closed-loop control so that the actual width value of the silencer ring gap is equal to the set width value.

3. The muffler ring gap control method according to claim 1, characterized in that: Before "obtaining the calibration value of the silencer ring clearance", confirm that the engine is in a stable operation stage.

4. A supercharger, comprising a compressor casing (100) and a muffler ring (200), wherein the compressor casing (100) comprises a compressor air inlet outer pipe (110), a compressor air inlet inner pipe (120) and an air outlet volute (130), wherein the compressor air inlet outer pipe (110) and the air outlet volute (130) are coaxially fixedly arranged, the compressor air inlet inner pipe (120) is coaxially arranged in the compressor air inlet outer pipe (110) to form an air flow channel (140), the compressor air inlet inner pipe (120) forms an air inlet channel (150), and the compressor air inlet outer pipe (110) and the air outlet volute (130) are coaxially fixedly arranged in the compressor air inlet outer pipe (110) to form an air flow channel (140), and ... The compressor air intake inner pipe (120) is provided with a flow widening flow channel (121), the flow widening flow channel (121) is connected to the air intake channel (150) and the air flow channel (140), the silencer ring (200) is connected to the compressor casing (100), and is spaced apart from the compressor air intake inner pipe (120) along the axial direction of the compressor air intake outer pipe (110) to form a silencer ring gap, the flow widening flow channel (121) is the inlet of the air flow channel (140), and the silencer ring gap is the outlet of the air flow channel (140); The air outlet volute (130) is connected to the inner cavity of the engine and the air intake passage (150), and is capable of expanding the airflow from the air intake passage (150) and introducing the airflow into the inner cavity of the engine; It is characterized in that The supercharger adjusts the silencer ring gap based on the silencer ring gap control method according to any one of claims 1 to 3, and the supercharger also includes an actuator (300), the actuator (300) is arranged on the compressor casing (100), the silencer ring (200) is connected to the actuator (300), and the actuator (300) can drive the silencer ring (200) to move to adjust the silencer ring gap.

5. The supercharger according to claim 4, characterized in that: The actuator (300) comprises a cylinder (310), a piston (320) and an elastic element (330); the cylinder (310) is arranged on the compressor casing (100); the silencer ring (200) is connected to the piston (320); and the elastic element (330) is arranged along the axial direction of the compressor intake outer pipe (110) and connected between the piston (320) and a fixing portion on the compressor casing (100); The silencer ring (200) can be moved away from the compressor intake inner pipe (120) under the drive of the piston (320) along the axial movement of the compressor intake outer pipe (110); The silencer ring (200) can also be moved closer to the compressor air inlet inner pipe (120) under the drive of the elastic recovery action of the elastic element (330).

6. The supercharger according to claim 5, characterized in that: The actuator (300) further comprises a control valve (340), wherein the control valve (340) is arranged between the rodless chamber of the cylinder (310) and an air source, and the control valve (340) is capable of controlling the amount of air entering the rodless chamber from the air source.

7. The supercharger according to claim 6, characterized in that: The supercharger further comprises a control mechanism, which is communicatively connected to the control valve (340) and is capable of controlling the opening of the control valve (340).

8. The supercharger according to claim 7, characterized in that: The actuator (300) further comprises a pressure sensor (350), wherein the pressure sensor (350) is arranged at a fixed portion on the compressor casing (100), connected to the elastic element (330), and communicatively connected to the control mechanism. The pressure sensor (350) is capable of detecting the elastic force of the elastic element (330), and the deformation amount of the elastic element (330) can be calculated based on the elastic force of the elastic element (330), and the deformation amount of the elastic element (330) is equal to the adjustment amount of the silencer ring gap.

9. The supercharger according to any one of claims 5 to 8, characterized in that: The cylinder (310) is annular in structure, and the piston (320) includes a plurality of piston rods, which are arranged at intervals along the circumferential direction on the compressor intake outer pipe (110) and are all connected to the silencer ring (200); There are a plurality of elastic elements (330), and the plurality of elastic elements (330) correspond one to one to the plurality of piston rods. The plurality of elastic elements (330) are arranged at intervals along the circumferential direction on the compressor air inlet outer pipe (110), and are all connected to the silencer ring (200) and the corresponding piston rod.

10. A vehicle, characterized in that It comprises an engine and a supercharger as claimed in any one of claims 4 to 9, wherein the inner cavity of the engine is connected to the exhaust volute (130).

Images