CN116066215A - Muffler air flow automatic regulating apparatus, muffler and motorcycle - Google Patents

Muffler air flow automatic regulating apparatus, muffler and motorcycle Download PDF

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Publication number
CN116066215A
CN116066215A CN202211663381.2A CN202211663381A CN116066215A CN 116066215 A CN116066215 A CN 116066215A CN 202211663381 A CN202211663381 A CN 202211663381A CN 116066215 A CN116066215 A CN 116066215A
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CN
China
Prior art keywords
muffler
engine
control unit
tail
tail pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211663381.2A
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Chinese (zh)
Inventor
黄彬
阙宇明
任强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Zongshen Innovation Technology Research Institute Co Ltd
Original Assignee
Chongqing Zongshen Innovation Technology Research Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chongqing Zongshen Innovation Technology Research Institute Co Ltd filed Critical Chongqing Zongshen Innovation Technology Research Institute Co Ltd
Priority to CN202211663381.2A priority Critical patent/CN116066215A/en
Publication of CN116066215A publication Critical patent/CN116066215A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
    • F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/04—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for motorcycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/08—Parameters used for exhaust control or diagnosing said parameters being related to the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
    • F01N2900/1411—Exhaust gas flow rate, e.g. mass flow rate or volumetric flow rate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/34—Control of exhaust back pressure, e.g. for turbocharged engines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Abstract

The invention discloses a muffler air flow automatic regulating device, a muffler and a motorcycle, wherein the muffler air flow automatic regulating device comprises a rotating speed acquisition unit, a control unit and a regulating mechanism; the rotating speed acquisition unit is used for acquiring the rotating speed of the engine and comprises a throttle position sensor for detecting the throttle opening of the engine, and is in signal connection with the control unit; the control unit is used for receiving the data of the rotating speed acquisition unit and controlling the adjusting mechanism according to the data; the adjusting mechanism comprises a stepping motor and a valve for adjusting the air flow in the tail pipe; the stepping motor is in signal connection with the control unit, a rotating shaft of the stepping motor is rotatably arranged on two side walls of the tail cover and the tail pipe in a penetrating mode, the valve is fixedly arranged on the rotating shaft, and the valve is arranged in the tail pipe. The control unit correspondingly adjusts the opening and closing angles of the valves according to the opening of the throttle valve to ensure that the exhaust of the engine is smooth, so that the output power and torque of the engine are improved, the oil consumption of the engine is reduced, and the noise pollution is reduced.

Description

Muffler air flow automatic regulating apparatus, muffler and motorcycle
Technical Field
The invention relates to the technical field of motorcycles, in particular to an automatic air flow adjusting device of a silencer. In addition, the invention also relates to a muffler and a motorcycle comprising the muffler air flow automatic regulating device.
Background
The motorcycle silencer is arranged on the tail pipe of the motorcycle engine and is used for absorbing the air flow discharged by the operation of the engine, and the air flow passes through the porous silencing pipe and is discharged into the atmosphere after noise attenuation. At present, the engine can generate different exhaust flow and exhaust back pressure at different rotating speeds, the whole motorcycle silencer is usually in a welded or riveted structure, the exhaust flow of the motorcycle silencer cannot be adjusted according to the exhaust flow of the engine, namely, the silencer is low in matching degree with the exhaust flow of the engine, the unsmooth exhaust of the engine and the rise of the exhaust back pressure are easy to cause, so that the output power and torque of the engine are reduced, and the heat efficiency conversion of the engine is restrained to increase the oil consumption; in addition, the exhaust of the engine is unsmooth, and the muffler is influenced to absorb the air flow and the corresponding noise discharged by the operation of the engine, so that the engine is high in noise and noise pollution is formed.
In summary, how to provide an automatic muffler airflow adjusting device, which can automatically adjust the exhaust flow to match the exhaust flow of the engine so as to make the engine exhaust smooth is a problem to be solved by those skilled in the art.
Disclosure of Invention
Accordingly, an object of the present invention is to provide an automatic muffler airflow adjusting device, which can automatically adjust the exhaust flow rate of the muffler airflow adjusting device to match the exhaust flow rate of the engine, so as to ensure the unobstructed exhaust of the engine.
Another object of the present invention is to provide a muffler and a motorcycle including the above-described muffler airflow automatic adjusting device.
In order to achieve the above object, the present invention provides the following technical solutions:
the silencer air flow automatic regulating device comprises a silencer pipe cylinder body, a silencer pipe sleeved in the silencer pipe cylinder body, a tail cover and a tail pipe sleeved in the tail cover, wherein the silencer pipe is sleeved with the tail pipe, and the silencer pipe cylinder body is fixedly connected with the tail cover; the device also comprises a rotating speed acquisition unit, a control unit and an adjusting mechanism;
the rotating speed acquisition unit is used for acquiring the rotating speed of the engine and comprises a throttle position sensor for detecting the throttle opening of the engine, and the rotating speed acquisition unit is in signal connection with the control unit;
the control unit is used for receiving the data of the rotating speed acquisition unit and controlling the adjusting mechanism according to the data;
the adjusting mechanism comprises a stepping motor and a valve for adjusting the air flow in the tail pipe; the stepping motor is in signal connection with the control unit, a rotating shaft of the stepping motor is rotatably arranged on two side walls of the tail cover and the tail pipe in a penetrating mode, the valve is fixedly arranged on the rotating shaft, and the valve is arranged in the tail pipe.
Preferably, the rotation speed acquisition unit further comprises an air inlet pressure temperature sensor, wherein the air inlet pressure temperature sensor is used for detecting air inlet temperature and air inlet back pressure of the engine, and the air inlet pressure temperature sensor is in signal connection with the control unit.
Preferably, the rotation speed acquisition unit further comprises a crank shaft position sensor, wherein the crank shaft position sensor is used for accurately detecting the rotation speed of the engine, and the crank shaft position sensor is in signal connection with the control unit.
Preferably, the adjusting mechanism further comprises a pair of shaft sleeves, the tail cover is provided with through holes penetrating through two side walls of the tail cover, the through holes are arranged along the direction perpendicular to the axis of the tail pipe, the pair of shaft sleeves are respectively sleeved at the end parts of the through holes and are connected with two side walls of the tail pipe, and the rotating shaft is fixedly sleeved in the through holes through the shaft sleeves.
Preferably, the adjusting mechanism further comprises a pair of rolling bearings, the rolling bearings are arranged in bearing holes of the shaft sleeve, two ends of the rotating shaft are sleeved in the shaft sleeve through the rolling bearings, and a limiting piece is sleeved at an orifice of the rotating shaft, which is located in the bearing holes, and is used for limiting axial movement of the rolling bearings.
Preferably, a sealing ring is arranged between the rotating shaft and the shaft sleeve, and the sealing ring is arranged close to the tail pipe.
Preferably, the motor mounting seat is further included, and the stepping motor is fixed in the motor mounting seat so as to buffer motor vibration.
Preferably, the tail pipe is welded with the outer end face of the tail cover so as to ensure that the tail pipe is firmly sleeved in the tail cover.
A muffler comprising a muffler airflow automatic adjustment device, the muffler airflow automatic adjustment device being the muffler airflow automatic adjustment device of any one of the above.
A motorcycle comprising a muffler airflow automatic adjustment device, the muffler airflow automatic adjustment device being the muffler airflow automatic adjustment device described in any one of the above.
Compared with the background art, the silencer air flow automatic regulating device provided by the invention comprises a silencer pipe cylinder body, a silencer pipe sleeved in the silencer pipe cylinder body, a tail cover and a tail pipe sleeved in the tail cover, wherein the silencer pipe is sleeved with the tail pipe, and the silencer pipe cylinder body is fixedly connected with the tail cover; the device also comprises a rotating speed acquisition unit, a control unit and an adjusting mechanism; the rotating speed acquisition unit is used for acquiring the rotating speed of the engine and comprises a throttle position sensor for detecting the throttle opening of the engine, and the rotating speed acquisition unit is in signal connection with the control unit; the control unit is used for receiving the data of the rotating speed acquisition unit and controlling the adjusting mechanism according to the data; the adjusting mechanism comprises a stepping motor and a valve for adjusting the air flow in the tail pipe; the stepping motor is in signal connection with the control unit, a rotating shaft of the stepping motor is rotatably arranged on two side walls of the tail cover and the tail pipe in a penetrating mode, the valve is fixedly arranged on the rotating shaft, and the valve is arranged in the tail pipe.
In the device, a throttle valve position sensor in the rotating speed acquisition unit detects the throttle valve opening of the engine and transmits signals to the control unit, the control unit controls the rotating angle of the rotating shaft of the stepping motor according to the throttle valve opening, as the valve is fixed on the rotating shaft of the stepping motor and is positioned in the tail pipe, the rotating shaft of the stepping motor can change the opening and closing angle of the valve, the control unit adjusts the opening and closing angle of the valve by controlling the rotating angle of the rotating shaft, so that the opening and closing angle of the valve can change along with the throttle valve opening in an equivalent way,
therefore, when the engine runs, different rotating speeds of the engine have corresponding throttle opening degrees, the control unit correspondingly adjusts the opening and closing angles of the valves according to the sizes of the throttle opening degrees, so that the exhaust flow in the silencer is ensured to be matched with the exhaust flow of the engine, the air flow exhausted by the engine enters the silencer, after noise reduction through the silencing pipe, the air flow exhausted by the engine can be quickly exhausted into the atmosphere from the tail pipe, so that the air flow congestion of the engine is avoided, the exhaust smoothness of the engine is ensured, the exhaust back pressure is reduced, the output power and the torque of the engine are improved, the oil consumption of the engine is reduced, and the noise pollution is reduced, therefore, the valve opening degrees in the silencer are automatically adjusted, and the corresponding exhaust flow and the exhaust back pressure of the engine under different rotating speeds can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a muffler airflow automatic regulating apparatus according to the present invention;
FIG. 2 is a cross-sectional view taken in the direction of FIG. 1 A-A;
fig. 3 is a cross-sectional view in the direction of fig. 2B-B.
In fig. 1 to 3, reference numerals include:
the silencer comprises a silencer tube body 1, a silencer tube 2, a tail cover 3, a tail tube 4, a control signal line 5, a power line 6, a stepping motor 7, a rotating shaft 8, a valve 9, a first group of bolts 10, a dust cover 11, a rolling bearing 12, a retainer ring 13, a shaft sleeve 14, a sealing ring 15, a retainer ring 16, a motor mounting seat 17, a second group of bolts 18 and a third group of bolts 19.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims at providing the silencer air flow automatic regulating device which can automatically regulate the exhaust flow of the silencer air flow automatic regulating device to be matched with the exhaust flow of an engine, so that the exhaust smoothness of the engine is ensured.
Another core of the present invention is to provide a muffler and a motorcycle including the above-described muffler airflow automatic adjusting device.
Referring to fig. 1 to 3, the automatic silencer air flow adjusting device provided by the invention comprises a silencing pipe cylinder 1, a silencing pipe 2 sleeved in the silencing pipe cylinder 1, a tail cover 3 and a tail pipe 4 sleeved in the tail cover 3, wherein the silencing pipe 2 is sleeved with the tail pipe 4, and the silencing pipe cylinder is fixedly connected with the tail cover 3; the device also comprises a rotating speed acquisition unit, a control unit and an adjusting mechanism; the rotating speed acquisition unit is used for acquiring the rotating speed of the engine and comprises a throttle position sensor for detecting the throttle opening of the engine, and the rotating speed acquisition unit is in signal connection with the control unit; the control unit is used for receiving the data of the rotating speed acquisition unit and controlling the adjusting mechanism according to the data; the adjusting mechanism comprises a stepping motor 7 and a valve 9 for adjusting the air flow in the tail pipe 4; the stepping motor 7 is in signal connection with the control unit, a rotating shaft 8 of the stepping motor 7 is rotatably arranged on two side walls of the tail cover 3 and the tail pipe 4 in a penetrating mode, a valve 9 is fixedly arranged on the rotating shaft 8, and the valve 9 is arranged in the tail pipe 4.
The throttle valve is usually provided at a position of an intake port of the engine to control an intake air amount of the engine, and the driver presses an accelerator pedal to control an opening degree of the throttle valve, so that the throttle valve opening degree is in a proportional relation with an engine speed as the throttle valve opening degree increases and the engine speed increases.
Specifically, the silencing pipe cylinder 1 is connected with the tail cover 3 through a third group of bolts 19, the silencing pipe 2 is sleeved in the silencing pipe cylinder 1, the tail pipe 4 is sleeved in the tail cover 3, the silencing pipe 2 is sleeved with the tail pipe 4, and the silencing pipe 2 and the tail pipe 4 are coaxially arranged; the throttle position sensor in the rotation speed acquisition unit is in signal connection with the control unit, the control unit is connected with the stepping motor 7 through the control signal line 5, the rotating shaft 8 of the stepping motor 7 penetrates through one side wall of the tail cover 3 and penetrates through the other side wall of the tail cover 3 by penetrating through two side walls of the tail pipe 4, the rotating shaft 8 is rotatably arranged in the tail pipe 4 and the tail cover 3, the valve 9 is fixed on the rotating shaft 8 through a first group of bolts 10, the valve 9 is arranged in a pipe body of the tail pipe 4 through the rotating shaft 8, the stepping motor 7 provides a power source for rotation of the rotating shaft 8 through the plug power line 6, and the rotating shaft 8 of the stepping motor 7 is fastened on the motor end cover through bolts.
In the using process of the device, a throttle valve position sensor in the rotating speed acquisition unit detects the throttle valve opening of the engine, signals are transmitted to the control unit, the control unit controls the rotating angle of the rotating shaft 8 of the stepping motor 7 according to the throttle valve opening, as the valve 9 is fixed on the rotating shaft 8 of the stepping motor 7 and is positioned in the tail pipe 4, the rotating shaft 8 of the stepping motor 7 can change the opening and closing angle of the valve 9, and the control unit controls the rotating angle of the rotating shaft 8 to adjust the opening and closing angle of the valve 9, so that the opening and closing angle of the valve 9 can change along with the same amount of the throttle valve opening.
On the basis of the embodiment, the rotating speed acquisition unit further comprises an air inlet pressure temperature sensor, wherein the air inlet pressure temperature sensor is used for detecting air inlet temperature and air inlet back pressure of the engine, and the air inlet pressure temperature sensor is in signal connection with the control unit.
The air inlet pressure temperature sensor is arranged on an air inlet pipeline of the engine and used for detecting the air inlet temperature and the air inlet back pressure of the air inlet pipe of the engine, and the air can be preheated in the air inlet pipe before entering the cylinder, so that the higher the air inlet temperature detected by the air inlet pressure temperature sensor is, the larger the air inlet amount required by the engine is, and the higher the engine rotating speed is; the greater the intake pressure, the greater the amount of fuel injected, the greater the force produced by the combustion of the gasoline and the higher the engine speed, so the higher the intake pressure and temperature sensor detects the intake backpressure, the higher the engine speed.
Specifically, the air inlet pressure temperature sensor is in signal connection with the control unit, and is used for transmitting air inlet temperature and air inlet back pressure signals of the engine to the control unit, the control unit judges the running speed of the engine according to the air inlet temperature and air inlet back pressure, and then the opening and closing angle of the valve 9 is adjusted to ensure that the exhaust flow in the silencer is matched with the exhaust flow of the engine, in addition, the air inlet pressure temperature sensor is suitable for detecting the speed of the engine in a high-temperature and high-pressure environment, so that the control unit can accurately acquire the running speed of the engine no matter under any working condition.
Optionally, a pressure sensor for detecting air intake back pressure of the engine and an air intake temperature sensor for detecting air intake temperature of the engine are arranged on an air intake pipe of the engine, and the pressure sensor and the temperature sensor are connected to the control unit in a signal mode, so that the control unit can judge the running rotating speed of the engine according to the air intake temperature and the air intake back pressure.
On the basis of the embodiment, the rotating speed acquisition unit further comprises a crankshaft position sensor, wherein the crankshaft position sensor is used for accurately detecting the rotating speed of the engine and is in signal connection with the control unit.
The crank position sensor is usually installed near the engine block, and is capable of accurately detecting the rotational speed of the engine.
Specifically, the crankshaft position sensor is in signal connection with the control unit and is used for transmitting a rotating speed signal of the engine to the control unit, so that the detecting data of the throttle position sensor can be checked, and the control unit can acquire accurate rotating speed of the engine.
Alternatively, the control unit of the present application is an ECU electronic control unit, which is commonly applied to small-sized devices in a vehicle body that are responsible for controlling a specific function.
Additionally, optionally, the throttle position sensor, the intake pressure temperature sensor, and the crankshaft position sensor transmit signals to the control unit using a CAN bus.
On the basis of the above embodiment, the adjusting mechanism further includes a pair of shaft sleeves 14, the tail cap 3 is provided with through holes penetrating through two side walls thereof, the through holes are arranged along the axial direction of the tail tube 4, the pair of shaft sleeves 14 are respectively sleeved at the ends of the through holes and are connected with two side walls of the tail tube 4, and the rotating shaft 8 is fixedly sleeved in the through holes through the shaft sleeves 14.
Specifically, the tail pipe 4 is sleeved in the tail cover 3, through holes are formed between two side walls of the tail cover 3 and two side walls of the tail pipe 4, the through holes are formed along the direction perpendicular to the axis of the tail pipe 4, the rotating shaft 8 is sleeved in the through holes and is arranged in the tail cover 3 and the tail pipe 4, the upper end part and the lower end part of the through holes are sleeved in the shaft sleeves 14, the two shaft sleeves 14 are arranged outside the cavity of the tail pipe 4, the shaft sleeves 14 are welded with the side walls of the tail pipe 4, so that the two shaft sleeves 14 are firmly sleeved in the through holes, and the rotating shaft 8 is sleeved in the through holes through the shaft sleeves 14 to prevent the rotating shaft 8 from being worn when rotating.
Optionally, one end of the rotating shaft 8 far away from the stepping motor 7 is sleeved into the shaft sleeve 14 and fixedly connected with the dust cover 11, so as to seal the function of the rotating shaft 8 and prevent external impurities from entering to influence the service life of the rotating shaft 8.
On the basis of the above embodiment, the adjusting mechanism further includes a pair of rolling bearings 12, the rolling bearings 12 are disposed in bearing holes of the shaft sleeve 14, two ends of the rotating shaft 8 are sleeved in the shaft sleeve 14 through the rolling bearings 12, and a limiting member is sleeved at a hole opening of the rotating shaft 8, which is located in the bearing holes, and is used for limiting axial movement of the rolling bearings 12.
Specifically, the adjusting structure further includes a pair of rolling bearings 12, that is, two rolling bearings 12, two ends of the shaft sleeve 14 are respectively provided with a bearing hole for installing the rolling bearings 12, the rolling bearings 12 are fixedly sleeved in the bearing holes, and the two rolling bearings 12 are respectively arranged between the end part of the rotating shaft 8 and the end part of the shaft sleeve 14, so that friction between the rotating shaft 8 and the shaft sleeve 14 is reduced, and therefore the working position of the rotating shaft 8 is maintained. The rotation accuracy of the rotation shaft 8 is improved. In addition, an annular clamping groove is formed in the rotating shaft 8 and is positioned at the orifice of the bearing hole, and the limiting piece is clamped in the annular clamping groove to fix the position of the rolling bearing 12, namely, limit the axial movement of the rolling bearing 12.
Optionally, the limiting piece in the application comprises a collar 16 and a retainer ring 13, wherein the collar 16 is sleeved in an annular clamping groove at the lower part of the rotating shaft 8 and is positioned at the outer hole of the bearing hole to limit the rolling bearing 12 to move axially, and the retainer ring 13 is sleeved in an annular clamping groove at the upper part of the rotating shaft 8 and is positioned at the inner hole of the bearing hole to limit the rolling bearing 12 to move axially; the type of the stopper in the present application is not exclusive, and other types of stoppers may be selected for the purpose of restricting the axial movement of the rolling bearing 12.
In addition, the rolling bearing 12 in the present application is a needle bearing, the type of the rolling bearing 12 is not unique, and other types of rolling bearings 12 may be provided according to actual requirements.
On the basis of the embodiment, a sealing ring 15 is arranged between the rotating shaft 8 and the shaft sleeve 14, and the sealing ring 15 is arranged close to the tail pipe 4. Because the air flow after noise reduction treatment is discharged from the tail pipe 4, the rotating shaft 8 penetrates through the tail pipe 4, and the sealing ring 15 is arranged between the rotating shaft 8 and the shaft sleeve 14, so that the leakage of the air in the tail pipe 4 through the penetrating position of the rotating shaft 8 is avoided.
On the basis of the above embodiment, the muffler airflow automatic adjusting device further includes a motor mount 17, the stepping motor 7 is fixed in the motor mount 17 to buffer motor vibration, and the stepping motor 7 is fixedly connected with the motor mount 17 through a second set of bolts 18.
On the basis of the embodiment, the tail pipe 4 is welded with the outer end surface of the tail cover 3, so that the tail pipe 4 is firmly sleeved in the tail cover 3.
In addition to the above-mentioned automatic muffler airflow adjusting device, the present invention also provides a muffler and a motorcycle including the automatic muffler airflow adjusting device disclosed in the above-mentioned embodiments, and the structure of each of the other parts is referred to the prior art, and will not be repeated herein.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The silencer air flow automatic regulating device, the silencer and the motorcycle provided by the invention are described in detail. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.

Claims (10)

1. The automatic silencer air flow adjusting device is characterized by comprising a silencing pipe cylinder body (1), a silencing pipe (2) sleeved in the silencing pipe cylinder body (1), a tail cover (3) and a tail pipe (4) sleeved in the tail cover (3), wherein the silencing pipe (2) is sleeved with the tail pipe (4), and the silencing pipe cylinder body is fixedly connected with the tail cover (3); the device also comprises a rotating speed acquisition unit, a control unit and an adjusting mechanism;
the rotating speed acquisition unit is used for acquiring the rotating speed of the engine and comprises a throttle position sensor for detecting the throttle opening of the engine, and the rotating speed acquisition unit is in signal connection with the control unit;
the control unit is used for receiving the data of the rotating speed acquisition unit and controlling the adjusting mechanism according to the data;
the adjusting mechanism comprises a stepping motor (7) and a valve (9) for adjusting the air flow in the tail pipe (4); the stepping motor (7) is in signal connection with the control unit, a rotating shaft (8) of the stepping motor (7) is rotatably arranged on two side walls of the tail cover (3) and the tail pipe (4) in a penetrating mode, the valve (9) is fixedly arranged on the rotating shaft (8), and the valve (9) is arranged in the tail pipe (4).
2. The muffler airflow automatic adjustment device according to claim 1, wherein the rotational speed acquisition unit further includes an intake pressure temperature sensor for detecting an intake temperature and an intake back pressure of the engine, the intake pressure temperature sensor being in signal connection with the control unit.
3. The muffler airflow automatic adjustment device according to claim 1, wherein the rotational speed acquisition unit further includes a crank position sensor for accurately detecting a rotational speed of the engine, the crank position sensor being in signal connection with the control unit.
4. A muffler airflow automatic adjusting apparatus according to any one of claims 1 to 3, wherein the adjusting mechanism further includes a pair of bosses (14), the tail cap (3) is provided with through holes penetrating both side walls thereof, the through holes are provided in a direction perpendicular to the axis of the tail pipe (4), a pair of bosses (14) are respectively fitted over the end portions of the through holes and connected to both side walls of the tail pipe (4), and the rotary shaft (8) is fixedly fitted in the through holes through the bosses (14).
5. The muffler airflow automatic adjusting apparatus according to claim 4, wherein the adjusting mechanism further includes a pair of rolling bearings (12), the rolling bearings (12) are provided in bearing holes of the shaft housing (14), both ends of the rotating shaft (8) are sleeved in the shaft housing (14) through the rolling bearings (12), and a stopper is sleeved at an orifice of the rotating shaft (8) and located in the bearing holes for restricting axial movement of the rolling bearings (12).
6. The automatic silencer air flow regulating device according to claim 5, wherein a sealing ring (15) is arranged between the rotating shaft (8) and the shaft sleeve (14), and the sealing ring (15) is arranged close to the tail pipe (4).
7. A muffler airflow automatic adjustment device according to any one of claims 1 to 3, further comprising a motor mount (17), the stepper motor (7) being fixed in the motor mount (17) to dampen motor vibrations.
8. A muffler airflow automatic adjustment device according to any one of claims 1 to 3, characterized in that the tail pipe (4) is welded to the outer end surface of the tail cover (3) to ensure that the tail pipe (4) is firmly fitted into the tail cover (3).
9. A muffler including a muffler airflow automatic adjustment device, characterized in that the muffler airflow automatic adjustment device is the muffler airflow automatic adjustment device according to any one of claims 1 to 8.
10. A motorcycle comprising a muffler airflow automatic adjustment device, characterized in that the muffler airflow automatic adjustment device is the muffler airflow automatic adjustment device according to any one of claims 1 to 8.
CN202211663381.2A 2022-12-23 2022-12-23 Muffler air flow automatic regulating apparatus, muffler and motorcycle Pending CN116066215A (en)

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CN202211663381.2A CN116066215A (en) 2022-12-23 2022-12-23 Muffler air flow automatic regulating apparatus, muffler and motorcycle

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CN202211663381.2A CN116066215A (en) 2022-12-23 2022-12-23 Muffler air flow automatic regulating apparatus, muffler and motorcycle

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CN116066215A true CN116066215A (en) 2023-05-05

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117028039A (en) * 2023-07-14 2023-11-10 宁海县博宇翔鹰汽车部件有限公司 Automatic control system of electric control valve for exhaust

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117028039A (en) * 2023-07-14 2023-11-10 宁海县博宇翔鹰汽车部件有限公司 Automatic control system of electric control valve for exhaust
CN117028039B (en) * 2023-07-14 2024-04-16 宁海县博宇翔鹰汽车部件有限公司 Automatic control system of electric control valve for exhaust

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