CN111188689A - Exhaust valve structure of automobile exhaust system - Google Patents
Exhaust valve structure of automobile exhaust system Download PDFInfo
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- CN111188689A CN111188689A CN202010159139.6A CN202010159139A CN111188689A CN 111188689 A CN111188689 A CN 111188689A CN 202010159139 A CN202010159139 A CN 202010159139A CN 111188689 A CN111188689 A CN 111188689A
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- exhaust system
- valve
- automobile
- worm wheel
- valve structure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/1035—Details of the valve housing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/1035—Details of the valve housing
- F02D9/105—Details of the valve housing having a throttle position sensor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/1065—Mechanical control linkage between an actuator and the flap, e.g. including levers, gears, springs, clutches, limit stops of the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/1075—Materials, e.g. composites
- F02D9/108—Plastics
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/1075—Materials, e.g. composites
- F02D9/1085—Non-organic materials, e.g. metals, alloys, ceramics
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention provides an exhaust valve structure of an automobile exhaust system, which is applied to the technical field of the automobile exhaust system, wherein an actuator sub-assembly (1) of the exhaust valve structure of the automobile exhaust system comprises an actuator shell (3), a motor shaft (7) of a motor (4) in the actuator shell (3) is provided with a worm (8) and a magnetic ring (9), the worm (8) is meshed with a worm wheel (5), the magnetic ring (9) is connected with a circuit board (6), a worm wheel output shaft of the worm wheel (5) extends to the outside of the actuator shell (3), a valve seat (11) of a valve body sub-assembly (2) is connected with the worm wheel output shaft, a valve plate (12) is connected with the valve seat (11), the exhaust valve structure of the automobile exhaust system can reduce low-frequency noise of a tail pipe of the automobile engine at low rotating speed and exhaust system backpressure of the automobile engine at high rotating speed, and release dynamic sound, the motion sense of the whole vehicle is improved, and the requirements are met.
Description
Technical Field
The invention belongs to the technical field of automobile exhaust systems, and particularly relates to an exhaust valve structure of an automobile exhaust system.
Background
In recent years, with the higher and higher requirements of consumers on the dynamic property of automobiles, the development of the large-emission engine technology and the worm supercharging engine technology is rapid. For a large-displacement worm-gear supercharged engine, in addition to the limitation of the space of an automobile chassis, the volume of an exhaust muffler is severely limited, the exhaust 'borne' noise at low rotating speed and the airflow noise at high rotating speed of the engine are required to be as low as possible, and the back pressure of an exhaust system of the engine at high rotating speed is also required to be reduced to meet the requirements of dynamic property and noise quality. In addition, in the background of large market for consumer upgrading, the personalized requirements of consumers on automobiles are higher and higher. The dynamic sound development is an individual function which is popular among young consumers, and the sense of motion of the automobile can be effectively improved. In order to meet the above requirements, the prior art generally adopts two technical routes, namely a passive valve or a vacuum valve: the passive valve completely pushes the opening angle of the valve plate by means of exhaust air pressure, the angle adjusting range is very limited, severe response hysteresis exists, and the effect of actually reducing exhaust low-frequency noise and improving the whole vehicle motion feeling is poor; the vacuum valve has certain improvement on an opening angle range compared with a passive valve by actively controlling the gas pressure of the switch valve, but the response lag and the instability of the gas pressure are still fatal and insufficient.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the defects of the prior art, the exhaust valve structure of the automobile exhaust system is convenient and accurate to control, can effectively reduce the low-frequency noise of the tail pipe of the automobile engine at a low rotating speed and the back pressure of the exhaust system of the automobile engine at a high rotating speed, releases dynamic sound under a high load, improves the motion feeling of the whole automobile and meets the actual requirements.
To solve the technical problems, the invention adopts the technical scheme that:
the invention relates to an exhaust valve structure of an automobile exhaust system, which comprises an actuator sub-assembly and a valve body sub-assembly, wherein the actuator sub-assembly comprises an actuator shell, a motor, a worm wheel and a circuit board are arranged in the actuator shell, a motor shaft of the motor is provided with a worm and a magnetic ring, the worm is meshed with the worm wheel, the magnetic ring is connected with the circuit board, a worm wheel output shaft of the worm wheel extends to the outside of the actuator shell, the valve body sub-assembly comprises a valve seat, the valve seat is connected with the worm wheel output shaft, and a valve sheet is.
The actuator sub-assembly further comprises a vortex spring, the valve body sub-assembly further comprises a spring seat, the spring seat is arranged on the upper portion of the valve seat, and the vortex spring is of a structure capable of being connected with a worm wheel output shaft and the spring seat.
The valve seat is provided with a connecting shaft, the lower end of the connecting shaft penetrates through the valve seat to be connected with the valve plate, and the upper end of the connecting shaft is connected with the spring seat.
The valve body sub-assembly further comprises a disc spring, a pressing plate I, a pressing plate II and a cushion block, wherein the disc spring, the pressing plate I, the pressing plate II and the cushion block are all installed on the connecting shaft, the pressing plate I and the pressing plate II are sequentially installed on the upper portion of the disc spring, and the cushion block is installed on the lower portion of the disc spring.
When a motor of the exhaust valve structure of the automobile exhaust system drives a motor shaft to rotate, the magnetic ring is arranged to be capable of rotating synchronously with the motor shaft, and when the magnetic ring rotates synchronously with the motor shaft, the magnetic ring is arranged to be capable of feeding back the rotation angle or rotation circle number information of the motor to the Hall sensor on the circuit board.
The circuit board of the exhaust valve structure of the automobile exhaust system is connected with the engine ECU, the engine ECU is set to be in a structure capable of feeding back information of the engine speed, the accelerator opening degree, the gear and the automobile speed to the circuit board, and when the engine ECU feeds back the information of the engine speed, the accelerator opening degree, the gear and the automobile speed to the circuit board, the circuit board is set to be in a structure capable of controlling the rotation angle or the rotation number of the motor according to the feedback information.
The exhaust valve structure of the automobile exhaust system is arranged on an engine exhaust pipe, the valve seat is arranged on the engine exhaust pipe, and the valve plate is positioned in the engine exhaust pipe.
The actuator shell is provided with a hole, the hole is provided with a semipermeable membrane, the valve seat is of a support structure, and the upper part of the valve seat is provided with a heat shield.
The actuator shell comprises a shell upper cover and a shell lower cover, and the shell upper cover and the shell lower cover are connected through bolts or welded through ultrasonic waves or laser.
The worm wheel output shaft of the worm wheel extends out of a lower cover shaft hole on the lower cover of the shell, and a sealing ring is arranged between the worm wheel output shaft and the lower cover shaft hole.
By adopting the technical scheme of the invention, the following beneficial effects can be obtained:
according to the exhaust valve structure of the automobile exhaust system, in the running process of an automobile, a control strategy and control parameters can be formulated through one or more signals of the engine speed, the accelerator opening, the gear and the automobile speed by combining the design of a silencer of the exhaust system and NVH tuning. When the actuator circuit board receives an input signal, the angle required by the valve plate is calculated according to a control strategy and control parameters, then the motor is controlled to run for a corresponding angle (or the number of turns) along the required steering direction, the motor is output by a worm gear output shaft after being decelerated and torque-increased by a worm gear transmission system, the torque and the angle are transmitted to a valve body spring seat through a vortex spring, the spring seat, a connecting shaft and the valve plate are all in rigid connection, and then the valve plate rotates to the required angle. When the circuit board receives the next input signal, the required rotation angle of the valve plate is recalculated according to the control strategy and the control parameters, and the required angle is executed. By adopting the technical scheme of the invention, the following beneficial effects can be obtained: through installing car exhaust system discharge valve structure additional to combine the design of exhaust system silencer, can realize: (1) when the engine is in idle speed or low load, the valve is closed, and the automobile tail gas is discharged through the bypass side complex noise elimination structure, so that the low-frequency noise can be effectively reduced, and the acoustic comfort of the whole automobile under idle speed and low load is improved. The problem that back pressure is increased more under high load caused by complicated noise elimination structure in the design of the existing exhaust system is solved. (2) When the engine is in a high-load working condition, the valve is opened, most of automobile exhaust is discharged through the valve side, the back pressure of an exhaust system of the automobile under the high load is reduced, the dynamic property of the whole automobile is improved, exhaust sound waves with great motion sense are released, and the pursuit of consumers on the motion sense of the automobile is met. The exhaust valve structure of the automobile exhaust system is simple in structure, convenient and accurate to control and reliable in performance, can effectively reduce low-frequency noise of a tail pipe of an automobile engine at a low rotating speed and exhaust system backpressure of the automobile engine at a high rotating speed, releases dynamic sound under a high load, improves the motion feeling of the whole automobile and meets requirements.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
FIG. 1 is a schematic front view of an exhaust valve structure of an automobile exhaust system according to the present invention;
FIG. 2 is a schematic side view of an exhaust valve structure of an automotive exhaust system according to the present invention;
FIG. 3 is a schematic top view of an exhaust valve structure of an automotive exhaust system in accordance with the present invention;
FIG. 4 is a schematic top view of a valve body subassembly of the exhaust valve structure of an automotive exhaust system according to the present invention;
FIG. 5 is a schematic bottom view of an actuator subassembly of the exhaust valve assembly of the automotive exhaust system of the present invention (including the mounting location of the scroll spring);
FIG. 6 is a schematic bottom view of an actuator subassembly of the exhaust valve structure of an automotive exhaust system according to the present invention (without the lower cover);
FIG. 7 is a schematic front view of an actuator subassembly of an exhaust valve assembly for an automotive exhaust system in accordance with the present invention;
FIG. 8 is a schematic rear view of an actuator subassembly of the exhaust valve configuration of an automotive exhaust system in accordance with the present invention;
FIG. 9 is a schematic front view of a valve body subassembly of the exhaust valve structure of an automobile exhaust system according to the present invention;
FIG. 10 is a schematic side view of a valve body subassembly of the exhaust valve structure of an automotive exhaust system in accordance with the present invention;
FIG. 11 is a schematic top view of a valve body subassembly of the exhaust valve structure of an automotive exhaust system in accordance with the present invention;
FIG. 12 is a schematic view of the internal structure of the valve body subassembly of the exhaust valve structure of an automotive exhaust system in accordance with the present invention;
in the drawings, the reference numbers are respectively: 1. an actuator subassembly; 2. the valve body sub-assembly; 3. an actuator housing; 4. a motor; 5. a worm gear; 6. a circuit board; 7. a motor shaft; 8. a worm; 9. a magnetic ring; 11. a valve seat; 12. a valve plate; 13. a scroll spring; 14. a spring seat; 15. a connecting shaft; 16. a heat shield; 17. a housing upper cover (upper cover); 18. a housing lower cover (lower cover); 19. a bolt; 20. a seal ring; 21. a disc spring; 22. pressing a plate I; 23. pressing a plate II; 24. cushion blocks; 25. a fixed block; 26. a nut; 27. a semi-permeable membrane.
Detailed Description
The following detailed description of the embodiments of the present invention, such as the shapes and structures of the components, the mutual positions and connection relations among the components, the functions and operation principles of the components, will be made by referring to the accompanying drawings and the description of the embodiments:
the invention discloses an exhaust valve structure of an automobile exhaust system, which comprises an actuator subassembly 1 and a valve body subassembly 2, wherein the actuator subassembly 1 comprises an actuator shell 3, a motor 4, a worm wheel 5 and a circuit board 6 are arranged in the actuator shell 3, a motor shaft 7 of the motor 4 is provided with a worm 8 and a magnetic ring 9, the worm 8 is meshed with the worm wheel 5, the magnetic ring 9 is connected with the circuit board 6, a worm wheel output shaft of the worm wheel 5 extends to the outside of the actuator shell 3, the valve body subassembly 2 comprises a valve seat 11, the valve seat 11 is connected with the worm wheel output shaft, and a valve plate 12 is connected with the valve seat 11. Above-mentioned structure provides an automobile exhaust system exhaust valve structure to the defect that exists among the prior art, installs in engine exhaust system tail pipe position. In the running process of the automobile, a control strategy and control parameters can be formulated through one or more signals of the engine speed, the accelerator opening, the gear and the vehicle speed by combining the design of a silencer of an exhaust system and NVH tuning. When the actuator circuit board receives an input signal, the angle required by the valve plate 12 is calculated according to a control strategy and control parameters, then the motor 4 (which can be a micro motor) is controlled to operate at a corresponding angle (or number of turns) along the required steering direction, the torque and the angle are transmitted to a spring seat (valve body spring seat) through a vortex spring 13 after the speed and the torque are reduced and increased by a worm and gear transmission system and are output by an output shaft of a worm gear 5, and the spring seat 14, a connecting shaft 15 and the valve plate 12 are all in rigid connection, so that the valve plate 12 rotates to the required angle. When the circuit board 6 (actuator circuit board) receives the next input signal, the required rotation angle of the valve plate 12 is recalculated according to the control strategy and the control parameters, and the required angle is executed. By adopting the technical scheme of the invention, the following beneficial effects can be obtained: through installing car exhaust system discharge valve structure (automatically controlled valve) additional to combine the design of exhaust system silencer, can realize: (1) when the engine is in idle speed or low load, the valve is closed, and the automobile tail gas is discharged through the bypass side complex noise elimination structure, so that the low-frequency noise can be effectively reduced, and the acoustic comfort of the whole automobile under idle speed and low load is improved. The problem that back pressure is increased more under high load caused by complicated noise elimination structure in the design of the existing exhaust system is solved. (2) When the engine is in a high-load working condition, the valve is opened, most of automobile exhaust is discharged through the valve side, the back pressure of an exhaust system of the automobile under the high load is reduced, the dynamic property of the whole automobile is improved, exhaust sound waves with great motion sense are released, and the pursuit of consumers on the motion sense of the automobile is met. The exhaust valve structure of the automobile exhaust system is convenient and accurate to control, reliable in performance, capable of effectively reducing low-frequency noise of a tail pipe of an automobile engine at low rotating speed and exhaust system backpressure of the automobile engine at high rotating speed, releasing dynamic sound under high load, improving the motion feeling of the whole automobile and meeting requirements.
The actuator subassembly 1 further comprises a vortex spring 13, the valve body subassembly 2 further comprises a spring seat 14, the spring seat 14 is arranged on the upper portion of the valve seat 11, and the vortex spring 13 is arranged to be capable of being connected with a worm wheel output shaft and the spring seat 14. Above-mentioned structure, the vortex spring sets up between spring holder and worm wheel output shaft, realizes buffer function, acts as the buffer at the action in-process, has effectively slowed down the speed sudden change, has alleviateed the impact that the system received in the twinkling of an eye in positive and negative reversal, has both ensured reliable transmission power, has improved the life of system again, and energy-conserving effect is very obvious.
The valve seat 11 is provided with a connecting shaft 15, the lower end of the connecting shaft 15 penetrates through the valve seat 11 to be connected with the valve plate 12, and the upper end of the connecting shaft 15 is connected with the spring seat 14. The valve body sub-assembly 2 further comprises a disc spring 21, a pressing plate I22, a pressing plate II 23 and a cushion block 24, the disc spring 21, the pressing plate I22, the pressing plate II 23 and the cushion block 24 are all installed on the connecting shaft 15, the pressing plate I22 and the pressing plate II 23 are sequentially installed on the upper portion of the disc spring 21, and the cushion block 24 is installed on the lower portion of the disc spring 21. In the structure, the disc springs 21 are arranged in series on the connecting shaft 15, the disc springs 21 can be made of high-temperature-resistant spring steel or high-temperature-resistant nickel-based materials, the cushion blocks 24 are arranged at the lower parts, the pressing plates I22 and the pressing plates II 23 are respectively arranged at the upper parts, and the pressing plates I22 are in interference press fit with the shaft holes of the valve seat 11 and are sometimes assisted to be welded. The use of belleville spring 21 and clamp plate I22 interference pressure equipment are supplementary with the welding, have guaranteed that shaft hole gas leakage volume is extremely low, have effectively avoided the interior high temperature exhaust of valve to leak the damage that brings the executor sub-assembly. Thus, the working reliability of the exhaust valve structure is improved.
When the motor 4 of the exhaust valve structure of the automobile exhaust system drives the motor shaft 7 to rotate, the magnetic ring 9 is set to be a structure capable of rotating synchronously with the motor shaft 7, and when the magnetic ring 9 rotates synchronously with the motor shaft 7, the magnetic ring 9 is set to be a structure capable of feeding back the rotation angle or rotation circle number information of the motor 4 to the Hall sensor on the circuit board 6. The exhaust valve structure of the automobile exhaust system is characterized in that a circuit board 6 is connected with an engine ECU, the engine ECU is set to be in a structure capable of feeding back information of the engine speed, the accelerator opening, the gear and the vehicle speed to the circuit board 6, and when the engine ECU feeds back information of the engine speed, the accelerator opening, the gear and the vehicle speed to the circuit board 6, the circuit board 6 is set to be in a structure capable of controlling the rotation angle or the rotation number of turns of the motor 4 according to the feedback information.
The exhaust valve structure of the automobile exhaust system is arranged on an engine exhaust pipe, the valve seat 11 is arranged on the engine exhaust pipe, and the valve plate 12 is positioned in the engine exhaust pipe. The actuator shell 3 is provided with an opening, a semi-permeable membrane 27 is arranged at the position of the opening, the valve seat 11 is of a support structure, and the upper part of the valve seat 11 is provided with a heat shield 16. In the structure, the actuator shell (actuator shell) is provided with the opening, and the semi-permeable membrane 27 (which can be permeable and impermeable) is arranged, so that the actuator subassembly 1 has a breathing function, and the harm caused by the expansion of gas in the actuator due to the heat dissipation of the motor 4 and the circuit board 6 is avoided. The installation of the semi-permeable membrane 27 can be realized by two processes of pasting and welding, and the process needs to be selected according to actual conditions.
The actuator housing 3 comprises a housing upper cover 17 and a housing lower cover 18, and the housing upper cover 17 and the housing lower cover 18 are connected through bolts or through ultrasonic welding or laser welding. Meanwhile, the actuator subassembly and the heat shield of the valve body subassembly are reliably connected through bolts and nuts.
The worm wheel output shaft of the worm wheel 5 extends out of a lower cover shaft hole on the lower cover 18 of the shell, and a sealing ring 20 is arranged between the worm wheel output shaft and the lower cover shaft hole. The sealing ring can reliably realize sealing.
In the exhaust valve structure of the automobile exhaust system according to the present invention, the valve plate 12 is designed to have a structure in which the upper portion and the lower portion thereof are respectively provided with a notch groove for positioning and mounting with the connecting shaft 15. Design 1 ~ 2 limit structure on the spring holder 14, the cooperation of 11 upper ends of disk seats sets up 1 ~ 2 limit structure for position accuracy when guaranteeing valve block 12 full-open is spacing. The upper cover 17, the lower cover 18 and the worm wheel 5 are manufactured by injection molding, and the actuator is made of high-temperature resistant plastic particle materials because the temperature of the use environment of the actuator ranges from minus 40 ℃ to 125 ℃. The upper cover 17 and the lower cover 18 can be made of PPS, PBT and the like, the worm wheel 5 is made of materials which meet temperature resistance requirements, wear resistance requirements and reasonable hardness range so as to prolong the transmission life of the transmission system, and the materials are selected from PA46 and the like. The model selection design of the motor 4 mainly considers two aspects of torque output and rotating speed, and the torque output is preferably large, so that the downstream resistance can be overcome; the rotation speed under a specific load is also preferably large so as to obtain a faster response speed, i.e. a shorter response time requirement. The motor 4 is fixedly arranged between the upper cover 17 (the upper cover of the shell) and the lower cover 18 (the lower cover of the shell), and is positioned and completely fixed by welding the limiting structure with the upper cover and the lower cover.
The worm 8 is made of copper alloy materials, is formed by finish turning, has tooth shapes meeting the meshing relation with the tooth shapes of the worm wheel, has the hardness range controlled at the level equivalent to that of the worm wheel, and is pressed on a motor shaft of the micromotor 4; in addition, a press-fitting magnetic ring is needed on a motor shaft and used for transmitting the rotation angle (or the number of turns) of the motor 4 to the Hall angle sensor on the circuit board 6 so as to realize angle closed-loop control. The magnetic strength and the stage number of the magnetic ring need to meet the data acquisition requirement and the angle control precision requirement of the Hall angle sensor. The axial drawing force of the worm in interference press fit on the motor shaft meets certain requirements, and the worm is ensured not to axially move when the worm and gear are in meshing transmission. The worm wheel output shaft extends to the outer side of the lower cover from the inside of the actuator through the shaft hole, a sealing ring is arranged between the shaft hole of the lower cover and the worm wheel output shaft, HNBR can be selected as the material of the sealing ring, and a proper hardness range is selected for preventing water and dust, and simultaneously, the rotating friction force at the position is reduced as much as possible, especially the rotating friction force when the interference is increased under the condition that the high-temperature worm wheel is heated and expanded. Lubricating grease is required to be coated on the inner wall of the shaft hole of the lower cover and the worm gear teeth so as to reduce the transmission resistance and the rotation resistance and effectively reduce the transmission noise. The selection of the lubricating grease does not affect the performance and the service life of adjacent parts such as injection molding parts, worms, circuit boards, micromotors and the like, the temperature resistance is required to be-40-125 ℃, the phenomenon that the lubricating grease is easy to deteriorate after long-term operation is ensured, and the service life is prolonged.
The circuit board 6 needs to be fixedly installed on the upper cover 17 of the shell, a plurality of step-type supporting columns are designed on the upper cover 17 of the shell, a plurality of matching holes are designed on the substrate of the circuit board 6, and the circuit board can be fixedly assembled by a hot melting welding process. In addition, the upper cover 17 and the lower cover 18 are generally packaged by a welding process, such as vibration friction welding, ultrasonic welding, laser welding, etc. The welding position structures of the upper cover 17 and the lower cover 18 are designed to be saw-toothed or triangular pointed, so that the welding is facilitated.
The present invention has been described in connection with the accompanying drawings, and it is to be understood that the invention is not limited to the specific embodiments disclosed, but is intended to cover various modifications, changes and equivalents of the embodiments of the invention, and its application to other applications without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides an automobile exhaust system discharge valve structure which characterized in that: including executor sub-assembly (1) and valve body sub-assembly (2), executor sub-assembly (1) includes executor casing (3), set up motor (4) in executor casing (3), worm wheel (5), circuit board (6), set up worm (8) and magnetic ring (9) on motor shaft (7) of motor (4), worm (8) and worm wheel (5) meshing, magnetic ring (9) are connected with circuit board (6), the worm wheel output shaft of worm wheel (5) extends to executor casing (3) outside, valve body sub-assembly (2) includes disk seat (11), disk seat (11) and worm wheel output shaft are connected, valve block (12) are connected with disk seat (11).
2. The exhaust valve structure of an automobile exhaust system according to claim 1, wherein: the actuator sub-assembly (1) further comprises a vortex spring (13), the valve body sub-assembly (2) further comprises a spring seat (14), the spring seat (14) is arranged on the upper portion of the valve seat (11), and the vortex spring (13) is arranged to be capable of being connected with a worm gear output shaft and the spring seat (14).
3. The exhaust valve structure of an automobile exhaust system according to claim 1 or 2, characterized in that: a connecting shaft (15) is arranged on the valve seat (11), the lower end of the connecting shaft (15) penetrates through the valve seat (11) to be connected with the valve plate (12), and the upper end of the connecting shaft (15) is connected with the spring seat (14).
4. The exhaust valve structure of an automobile exhaust system according to claim 3, wherein: the valve body sub-assembly (2) further comprises a disc spring (21), a pressing plate I (22), a pressing plate II (23) and a cushion block (24), the disc spring (21), the pressing plate I (22), the pressing plate II (23) and the cushion block (24) are all installed on the connecting shaft (15), the pressing plate I (22) and the pressing plate II (23) are installed on the upper portion of the disc spring (21) in sequence, and the cushion block (24) is installed on the lower portion of the disc spring (21).
5. The exhaust valve structure of an automobile exhaust system according to claim 1 or 2, characterized in that: when a motor (4) of the exhaust valve structure of the automobile exhaust system drives a motor shaft (7) to rotate, a magnetic ring (9) is arranged to be capable of rotating synchronously with the motor shaft (7), and when the magnetic ring (9) rotates synchronously with the motor shaft (7), the magnetic ring (9) is arranged to be capable of feeding back the rotating angle or rotating circle number information of the motor (4) to a Hall sensor on a circuit board (6).
6. The exhaust valve structure of an automobile exhaust system according to claim 5, wherein: the exhaust valve structure of the automobile exhaust system is characterized in that a circuit board (6) is connected with an engine ECU, the engine ECU is set to be in a structure capable of feeding back information of engine speed, accelerator opening, gear and vehicle speed to the circuit board (6), and when the engine ECU feeds back information of the engine speed, the accelerator opening, the gear and the vehicle speed to the circuit board (6), the circuit board (6) is set to be in a structure capable of controlling the rotation angle or the rotation number of turns of a motor (4) according to the feedback information.
7. The exhaust valve structure of an automobile exhaust system according to claim 1 or 2, characterized in that: the exhaust valve structure of the automobile exhaust system is arranged on an engine exhaust pipe, the valve seat (11) is arranged on the engine exhaust pipe, and the valve plate (12) is positioned in the engine exhaust pipe.
8. The exhaust valve structure of an automobile exhaust system according to claim 1 or 2, characterized in that: executor casing (3) on set up the trompil, the installation pellicle in trompil position, valve seat (11) be supporting structure, valve seat (11) upper portion sets up heat exchanger (16).
9. The exhaust valve structure of an automobile exhaust system according to claim 1 or 2, characterized in that: the actuator shell (3) comprises a shell upper cover (17) and a shell lower cover (18), and the shell upper cover (17) and the shell lower cover (18) are connected through bolts or welded through ultrasonic waves or laser.
10. The exhaust valve structure of an automobile exhaust system according to claim 9, wherein: a worm wheel output shaft of the worm wheel (5) extends out of a lower cover shaft hole on the lower cover (18) of the shell, and a sealing ring (20) is arranged between the worm wheel output shaft and the lower cover shaft hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010159139.6A CN111188689A (en) | 2020-03-09 | 2020-03-09 | Exhaust valve structure of automobile exhaust system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010159139.6A CN111188689A (en) | 2020-03-09 | 2020-03-09 | Exhaust valve structure of automobile exhaust system |
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| CN111188689A true CN111188689A (en) | 2020-05-22 |
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| CN202010159139.6A Pending CN111188689A (en) | 2020-03-09 | 2020-03-09 | Exhaust valve structure of automobile exhaust system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112303255A (en) * | 2020-10-26 | 2021-02-02 | 慈溪市中航精密机械设备制造有限公司 | Exhaust butterfly valve for automobile and production process thereof |
| CN113738516A (en) * | 2021-09-09 | 2021-12-03 | 芜湖力锐德电子科技有限公司 | Electric actuator for control valve of automobile exhaust system |
-
2020
- 2020-03-09 CN CN202010159139.6A patent/CN111188689A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112303255A (en) * | 2020-10-26 | 2021-02-02 | 慈溪市中航精密机械设备制造有限公司 | Exhaust butterfly valve for automobile and production process thereof |
| CN113738516A (en) * | 2021-09-09 | 2021-12-03 | 芜湖力锐德电子科技有限公司 | Electric actuator for control valve of automobile exhaust system |
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