CN113847118A - System and method for actively sounding exhaust silencer assembly - Google Patents

System and method for actively sounding exhaust silencer assembly Download PDF

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Publication number
CN113847118A
CN113847118A CN202111061586.9A CN202111061586A CN113847118A CN 113847118 A CN113847118 A CN 113847118A CN 202111061586 A CN202111061586 A CN 202111061586A CN 113847118 A CN113847118 A CN 113847118A
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flow
inflation
sound wave
target
target flow
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CN113847118B (en
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陈思超
魏先斗
赵延茹
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Zhejiang Geely Holding Group Co Ltd
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Zhejiang Geely Holding Group Co Ltd
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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
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • 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
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • 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
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M15/00—Testing of engines
    • G01M15/04—Testing internal-combustion engines
    • G01M15/10—Testing internal-combustion engines by monitoring exhaust gases or combustion flame
    • G01M15/102—Testing internal-combustion engines by monitoring exhaust gases or combustion flame by monitoring exhaust gases
    • 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)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exhaust Silencers (AREA)

Abstract

The invention provides an active sounding system and method for an exhaust silencer assembly, and belongs to the technical field of automobiles. The problem that the real movement sound waves cannot be brought by the existing scheme is solved. The system for actively producing sound of the exhaust silencer assembly comprises an air inlet pipeline and an air outlet pipeline which are connected to the silencer assembly, wherein an air inlet flow sensor is arranged on the air inlet pipeline, an air charging pipeline and air charging equipment connected with the air charging pipeline are further connected to the silencer assembly, the system for actively producing sound of the exhaust silencer assembly further comprises a sound wave control unit, the air inlet flow sensor and the air charging equipment are both connected with the sound wave control unit, the sound wave control unit is used for acquiring target flow capable of achieving a sound wave effect according to a selected driving mode, and then whether the air charging equipment is started or not is controlled according to a comparison result of the target flow and the air inlet flow acquired by the air inlet flow sensor. The invention can make the low-displacement automobile achieve the real movement sound wave effect.

Description

System and method for actively sounding exhaust silencer assembly
Technical Field
The invention belongs to the technical field of automobiles, and relates to a system and a method for actively producing sound by an exhaust silencer assembly.
Background
Along with the rapid development of society, the personalized demand of people on automobile products is increased greatly, more and more people pursue the stimulation brought by automobile exhaust sound waves, but in the existing actual automobile products, the exhaust motion sound waves are more and more shared by luxury automobile markets, low-displacement automobiles are limited by the flow of an engine, in the existing solution, more and more, the exhaust sound waves at a certain stage are realized through the opening angle of the sound wave valve or the exhaust motion sound waves are realized through increasing a microphone to preset a sound program, for example, the automobile engine sound wave simulation method and the system disclosed by Chinese patent documents can select audio data with corresponding frequency and send the audio data to a vehicle-mounted sound box when a brake pedal or an accelerator pedal of a new energy automobile is operated, and the driving linkage is realized through simulating various sounds sent by an oil-fueled automobile engine, the driving pleasure and the driving experience are enhanced.
However, the above scheme has the following disadvantages: the scheme of the sound wave valve is limited by the displacement of an engine, the sound wave valve cannot completely realize real movement sound waves brought by a large-displacement automobile through the internal structure design of a tuning valve and a silencer, and the scheme of a microphone or a sound device cannot bring real movement sound waves. Therefore, for low displacement cars, the existing solutions do not provide a perfect acoustic solution.
Disclosure of Invention
The invention aims to provide a system and a method for actively sounding an exhaust silencer assembly aiming at the problems in the prior art, and the technical problems to be solved are as follows: how to make the low-displacement automobile achieve the real movement sound wave effect.
The purpose of the invention can be realized by the following technical scheme: the utility model provides a system for initiative sound production of exhaust muffler assembly, the admission line and the pipeline of giving vent to anger of connection on the muffler assembly, be provided with the inlet flow sensor who is used for monitoring the interior engine exhaust inlet flow of admission line on the admission line, still be connected with the gas tube on the muffler assembly and aerify the equipment of being connected with the gas tube, system for initiative sound production of exhaust muffler assembly still includes the sound wave control unit, inlet flow sensor and aerify equipment all with the sound wave control unit is connected, the sound wave control unit is used for obtaining the target flow that can reach the sound wave effect according to the driving pattern of selection, and then controls whether the equipment of aerifing opens according to the comparative result of the inlet flow that target flow and inlet flow sensor gathered.
The working principle is as follows: in order to enable the low-displacement automobile to achieve the effect of moving sound waves, target flow corresponding to each mode is stored in the system in advance, and the set target flow is the flow which can enable the automobile to achieve the effect of moving sound waves; in the running process of the automobile, an air intake flow sensor arranged on an air intake pipeline collects the gas flow discharged by an engine in real time and sends the collected gas flow signal to a sound wave control unit, the sound wave control unit firstly obtains a target flow according to the currently selected driving mode of the automobile and then compares the gas flow collected by the air intake flow sensor with the target flow, when the collected gas flow is less than the target flow, a control instruction for controlling the inflation equipment to be opened is output, the inflation equipment is opened under the action of the control instruction to work, the inflation flow is generated and enters the silencer assembly to be converged with the air inlet flow and then is discharged from the air outlet pipeline, the arrangement of the inflation equipment increases the exhaust flow in the silencer assembly, the vehicle with low displacement can also obtain the moving sound wave effect which can be achieved by the vehicle with large displacement, and the moving sound wave effect is real.
In the system for actively producing sound of the exhaust silencer assembly, the inflation pipeline is provided with an inflation flow sensor for monitoring inflation flow in the inflation pipeline, the inflation flow sensor is connected with the sound wave control unit, and the sound wave control unit is used for controlling whether the inflation equipment is closed or not according to the inflation flow monitored by the inflation flow sensor. The arrangement of the inflation flow sensor can accurately control the sum of the inflation flow and the intake flow within the target flow, and improve the motion sound wave effect of the low-displacement vehicle.
In the above system for actively generating sound by an exhaust muffler assembly, the sound wave control unit includes:
the target flow storage module is used for storing target flow which can achieve the sound wave effect in different driving modes;
the driving parameter acquisition module is used for acquiring vehicle driving parameters under each driving mode, wherein the vehicle driving parameters comprise an engine rotating speed signal, an accelerator opening degree signal, an actual gear signal, an ignition switch state signal and an environment temperature signal;
the target flow correction module is used for correcting the target flow in the target flow storage module according to the vehicle running parameters so as to obtain a target flow correction value in a corresponding driving mode;
the preset flow obtaining module is used for obtaining a corresponding target flow correction value according to the currently selected driving mode and the vehicle running parameter;
and the control module is used for controlling the inflating equipment to inflate the silencer assembly when the air inflow collected by the air inflow sensor is smaller than the target flow, and controlling whether the inflating equipment stops working or not according to a comparison result of the sum of the inflating flow and the air inflow and a target flow correction value.
In the above system for actively generating sound in an exhaust muffler assembly, the control module comprises:
the total flow calculation submodule is used for adding the inflation flow and the intake flow collected by the intake flow sensor so as to obtain the actual total gas flow;
the total flow deviation comparison submodule is used for comparing the actual total gas flow with the target flow correction value to obtain total flow deviation;
and the control submodule is used for judging that the actual total gas flow meets the requirement and controlling the inflation equipment to stop working when the total flow deviation meets the error range of the target flow correction value.
Controlling the actual total gas flow to be within the error range of the target flow correction value, wherein the error range can be manually set, for example, error setting is carried out by positive and negative 10% of the target flow correction value, when the actual total gas flow is within the error range of the target flow correction value, the sum of the current inflation flow and the intake flow is represented to meet the requirement of the target flow correction value in the current mode, the motion sound wave effect of the high-displacement automobile can be achieved, and at the moment, the inflation equipment is controlled to stop working; and when the actual total gas flow is not in the error range of the target flow correction value and is smaller than the target flow correction value, controlling the inflation equipment to continue working, and when the actual total gas flow is not in the error range of the target flow correction value but is larger than the target flow correction value, controlling the inflation equipment to stop working.
In the above-mentioned system for actively generating sound by an exhaust muffler assembly, the control module further includes:
the difference comparison submodule is used for acquiring a flow difference value of the intake flow compared with the target flow correction value;
the flow deviation comparison submodule is used for comparing the inflation flow monitored by the inflation flow sensor in real time with the flow difference value to obtain flow deviation;
and the control submodule is used for controlling the total flow calculation submodule to add and calculate the charging flow and the intake flow when the flow deviation meets the set flow error range.
Firstly, a difference value comparison submodule acquires a flow difference value between the intake flow and a target flow correction value, controls an inflating device to inflate and inflates based on the flow difference value, when the inflation flow is within the error range of the flow difference, the error range can be set manually, if the error setting is carried out by plus or minus 10 percent of the flow difference value, the total flow calculation submodule is controlled to calculate the sum of the current inflation flow and the intake flow, the situation that the total flow calculation submodule needs to carry out addition calculation in real time during judgment and then compares the sum with a target flow correction value, the operation is complex, the difference value comparison submodule obtains the flow difference value, judges whether the inflating flow meets the requirement or not according to the flow difference value, when the requirement is met, whether the sum of the charging flow and the intake flow meets the target flow correction value is judged, and the operation effectively simplifies the judgment step.
In the active sounding system of the exhaust silencer assembly, the air outlet pipeline is provided with a tuning valve, and the sound wave control unit is connected with the tuning valve. The setting of air-vent valve can further increase the sound wave effect of motion to can obtain different motion sound wave sounds.
In the active sounding system of the exhaust silencer assembly, the sound wave control unit is further connected with a selection button for turning on or off the sound wave function of the automobile movement. The setting of selection button makes the navigating mate can select the function that wants according to self demand, and is more humanized.
In the above-mentioned system for actively generating sound by the exhaust silencer assembly, the sound wave control unit is further connected to an inflation controller for controlling the inflation device to stop or start inflation. The inflation controller is arranged, so that the inflation equipment can be controlled to be opened and closed more quickly.
A method of actively sounding an exhaust muffler assembly, comprising the steps of:
acquiring target flow for achieving a sound wave effect according to the selected driving mode;
acquiring the air intake flow discharged by an engine in an air intake pipeline of the silencer assembly in real time through an air intake flow sensor;
comparing the air inflow with the target flow, and controlling the inflating equipment to inflate the muffler assembly when the air inflow is smaller than the target flow;
the inflation flow generated by the inflation equipment is monitored in real time through the inflation flow sensor, and whether the inflation equipment stops working or not is controlled according to a comparison result of the sum of the inflation flow and the intake flow and the target flow.
The working principle is as follows: firstly, according to the current driving mode of the vehicle, acquiring a target flow rate for achieving the motion sound wave effect when the vehicle exhausts, wherein the target flow rate is a gas flow rate value required by the silencer assembly to achieve the motion sound wave effect, the driving mode comprises an energy saving mode (ECO), a Comfort mode (Comfort), a motion mode (Sports), S +, and the like, and each mode corresponds to different target flow rates respectively. When the target flow is obtained, the intake flow sensor also collects the intake flow in the intake pipeline of the silencer assembly in real time, and the intake flow in the intake pipeline of the silencer assembly is gas exhausted by the working of the engine. The collected intake air flow is compared with the target flow, when the intake air flow is smaller than the target flow, the fact that the current intake air flow cannot enable the vehicle to achieve the effect of moving sound waves is shown, the inflating equipment needs to be controlled to start so that the inflating equipment inflates the silencer assembly, in the inflating process of the inflating equipment, the inflating flow sensor can monitor the inflating flow generated by the inflating equipment in real time, when the sum of the inflating flow and the intake air flow reaches the target flow, the inflating equipment is controlled to stop working, at the moment, the vehicle can achieve the effect of moving sound waves required by a driver in the driving process, the effect of moving sound waves is real, and the problem that the existing low-displacement vehicle cannot achieve real moving sound waves caused by a large-displacement vehicle is effectively solved.
In the method for actively sounding an exhaust muffler assembly, after acquiring a target flow rate for achieving a sound wave effect according to a selected driving mode, the target flow rate is corrected according to vehicle driving parameters in the driving mode, wherein the correcting operation comprises:
acquiring vehicle running parameters under the driving mode, wherein the vehicle running parameters comprise an engine rotating speed signal, an accelerator opening signal, an actual gear signal, an ignition switch state signal and an environment temperature signal;
and correcting the target flow according to the vehicle running parameters so as to obtain a target flow correction value under the corresponding driving mode. The target flow correction value can be set in advance according to vehicle running parameters, after the target flow is obtained, the target flow correction value is obtained according to the vehicle running parameters, whether the inflation equipment works or not is controlled through the target flow correction value, the operation can enable the movement sound wave effect to sound according to the actual running condition of the vehicle, and the movement sound wave effect of the low-displacement automobile is effectively improved.
In the above method of actively generating sound by an exhaust muffler assembly, the operation of controlling whether the inflator stops operating according to the comparison result of the sum of the charging flow rate and the intake flow rate with the target flow rate includes:
acquiring a flow difference value of the intake flow compared with a target flow correction value;
comparing the inflation flow monitored by the inflation flow sensor in real time with the flow difference to obtain flow deviation, and adding the inflation flow and the intake flow collected by the intake flow sensor when the flow deviation meets a set flow error range to obtain actual total gas flow;
and comparing the actual total gas flow with the target flow correction value to obtain a total flow deviation, judging that the actual total gas flow meets the requirement when the total flow deviation meets the set total flow error range, and controlling the inflation equipment to stop working.
The work of the air charging equipment can enable the total flow in the silencer assembly to reach the target flow, so that the low-displacement automobile can also achieve the moving sound wave effect of a large-displacement automobile.
In the method for actively sounding the exhaust silencer assembly, the actual total gas flow is judged to meet the requirement, the inflation equipment is controlled to stop working, and meanwhile, the opening degree of a tuning valve at the air outlet pipe of the silencer assembly is controlled to be adjusted according to the driving mode and the vehicle running parameters. The opening of the tuning valve can be preset according to the driving mode and the vehicle driving parameters, the effect of exhaust sound waves can be further improved by controlling the opening of the tuning valve, different sounds emitted by different driving modes can be different, or different movement sound waves can be emitted by the same driving mode, the requirements of different drivers and passengers can be met, and the three sub-modes of mild, moderate and violent sub-modes can be set in the same driving mode.
In the above method for actively generating sound by an exhaust muffler assembly, the method further comprises the following steps:
setting a selection key for turning on or off the sound wave function of the automobile movement;
before the operation step of obtaining the target flow for achieving the sound wave effect according to the selected driving mode, the automobile movement sound wave function is started by operating the selection key. The setting of selection button makes navigating mate open through selecting the button when needs experience motion sound wave effect, and when not needing, the accessible is selected the button and is closed, controls more intelligently and more humanized, more can satisfy most people's demand.
Compared with the prior art, the system and the method for actively producing sound by the exhaust silencer assembly have the following advantages:
1. according to the invention, the inflation flow of the inflation equipment is controlled, so that the low-displacement automobile can achieve a real movement sound wave effect, and the quality problem that the movement sound wave of a high-displacement engine is difficult to obtain when the flow of the low-displacement engine is insufficient or the instantaneous airflow is insufficient is solved.
2. The invention also acquires the vehicle running parameters, and corrects the target flow in real time according to the vehicle running parameters, so that the final sound wave effect can be changed according to the current running state of the vehicle, different movement sound waves of the full-running mileage under the comprehensive road condition are realized, and the quality types of the movement sound waves are enriched.
Drawings
Fig. 1 is a schematic diagram of the control structure of the present invention.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is a control flow diagram of the present invention.
Fig. 4 is a control flow diagram of the present invention.
In the figure, 1, a silencer assembly; 2. an air intake duct; 3. an air outlet pipe; 4. an intake air flow sensor; 5. an inflation flow sensor; 6. an inflation device; 7. an inflation conduit; 8. a sound wave control unit; 81. a target flow storage module; 82. a preset flow obtaining module; 83. a control module; 83a, a difference comparison submodule; 83b, a flow deviation comparison submodule; 83c, a total flow calculation submodule; 83d, a total flow deviation comparison submodule; 83e, a control submodule; 84. a driving parameter acquisition module; 85. a target flow correction module; 9. an inflation controller; 10. a tone tuning valve; 11. and selecting a key.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in fig. 2, the active sounding system of the exhaust muffler assembly 1 includes an inlet pipe 2 and an outlet pipe 3 connected to the muffler assembly 1, an inflation pipe 7 and an inflation device 6 connected to the inflation pipe 7 are further connected to the muffler assembly 1, the inflation device 6 is used for providing gas to increase the exhaust flow rate in the muffler assembly 1, an inlet flow sensor 4 for monitoring the inlet flow rate of the engine discharged from the inlet pipe 2 is arranged on the inlet pipe 2, an inflation flow sensor 5 for monitoring the inlet flow rate in the inflation pipe 7 is arranged on the inflation pipe 7, and a tuning valve 10 is arranged on the outlet pipe 3.
As shown in fig. 1, the active sounding system of the exhaust silencer assembly 1 further includes a sound wave control unit 8, an inflation controller 9 and a selection button 11, wherein the inflation flow sensor 5, the intake flow sensor 4, the tuning valve 10 and the selection button 11 are all connected with the sound wave control unit 8, and the inflation controller 9 is respectively connected with the sound wave control unit 8 and the inflation device 6. The sound wave control unit 8 includes:
the target flow storage module 81 is used for storing target flows which can achieve the sound wave effect in different driving modes;
a driving parameter obtaining module 84, configured to obtain vehicle driving parameters in each driving mode, where the vehicle driving parameters include an engine speed signal, an accelerator opening degree signal, an actual gear signal, an ignition switch state signal, and an environment temperature signal;
a target flow correction module 85, configured to correct the target flow in the target flow storage module 81 according to the vehicle driving parameter, so as to obtain a target flow correction value in the corresponding driving mode;
a preset flow obtaining module 82, configured to obtain a corresponding target flow correction value according to a currently selected driving mode and a vehicle driving parameter;
and the control module 83 is configured to control the inflator 6 to perform inflation operation on the muffler assembly 1 when the intake flow collected by the intake flow sensor 4 is smaller than the target flow, and control whether the inflator 6 stops operating according to a comparison result between a sum of the inflation flow and the intake flow and a target flow correction value. The connection relationship among the modules is as follows: the target flow storage module 81 is connected to the preset flow obtaining module 82 and the target flow correction module 85, the driving parameter obtaining module 84 is connected to the target flow correction module 85, and the preset flow obtaining module 82 is connected to the control module 83.
Wherein the control module 83 specifically includes:
a difference comparison submodule 83a for acquiring a flow difference between the intake flow and the target flow;
the flow deviation comparison submodule 83b is used for comparing the inflation flow monitored by the inflation flow sensor 5 in real time with the flow difference value to obtain the flow deviation;
the total flow calculation submodule 83c is configured to add the inflation flow and the intake flow collected by the intake flow sensor 4 when the flow deviation satisfies the set flow error range, so as to obtain an actual total gas flow;
a total flow deviation comparison submodule 83d for comparing the actual total gas flow with the target flow correction value to obtain a total flow deviation;
the control submodule 83e is used for judging that the actual total gas flow meets the requirement when the total flow deviation meets the set total flow error range, and controlling the inflation equipment 6 to stop working;
the difference comparison submodule 83a is respectively connected with the intake flow sensor 4, the preset flow obtaining module 82, the target flow correction module 85, the flow deviation comparison submodule 83b and the control submodule 83e, and is used for obtaining intake flow and target flow correction values, comparing the intake flow and the target flow correction values, sending a comparison result to the control submodule 83e, and sending the obtained flow difference value to the flow deviation comparison submodule 83 b; the flow deviation comparison submodule 83b is connected with the inflation flow sensor 5 and the control submodule 83e, and is used for comparing the inflation flow with the flow difference and transmitting the obtained flow deviation to the control submodule 83 e; the total flow calculation submodule 83c is respectively connected to the total flow deviation comparison submodule 83d, the inflation flow sensor 5 and the intake flow sensor 4, and is configured to add the inflation flow and the intake flow to obtain an actual total gas flow, and send the actual total gas flow to the total flow deviation comparison submodule 83 d; the total flow deviation comparison submodule 83d is respectively connected to the control submodule 83e and the preset flow obtaining module 82, and is configured to compare the actual total gas flow with the target flow correction value to obtain a total flow deviation and transmit the total flow deviation to the control submodule 83 e; the control submodule 83e is connected to the inflation controller 9 and the tuning valve 10, and is configured to send a control command to the inflation controller 9 and control the tuning valve 10 to adjust the opening degree, and the inflation controller 9 controls the inflation device 6 to start or close according to the control command.
When the system works, firstly, a target flow storage module 81 in the sound wave control unit 8 prestores target flow which can achieve sound wave effect under different driving modes, the target flow is set, the obtained exhaust flow is stored as the target flow by measuring the exhaust flow of a large-displacement automobile under various modes, in order to achieve more optimal sports sound wave effect, the target flow is corrected by a target flow correction module 85 according to vehicle running parameters obtained by a running parameter obtaining module 84, namely, a corresponding target flow correction value is obtained according to an engine rotating speed signal, an accelerator opening degree signal, an actual gear signal, an ignition switch state signal, an environment temperature signal and the like and is stored in the target flow storage module 81, and the target flow correction value is set and can also be obtained by measuring the exhaust flow of the large-displacement automobile under various modes and various vehicle running parameters Is stored as the target flow correction value.
When the selection button 11 selects to turn on the sound wave function, a preset flow obtaining module 82 in the sound wave control unit 8 obtains a target flow correction value according to the current driving mode and the vehicle running parameters of the vehicle and sends the target flow correction value to a difference comparison submodule 83a in the control module 83, the difference comparison submodule 83a receives the intake flow collected by the intake flow sensor 4 and compares the intake flow with the target flow correction value, when the intake flow is smaller than the target flow correction value, a comparison result is sent to a control submodule 83e, meanwhile, a flow difference obtained by comparing the flow with the target flow correction value is sent to a flow deviation comparison submodule 83b, the control submodule 83e sends a turn-on control instruction to the inflation controller 9 according to the received comparison result, and the inflation controller 9 controls the inflation device 6 to work according to the received turn-on control instruction, the gas generated by the gas charging device 6 is delivered to the silencer assembly 1 through the gas charging pipe 7, and is integrated with the gas inlet flow in the silencer assembly 1, meanwhile, the gas charging flow sensor 5 monitors the gas charging flow in the gas charging pipe 7 and sends the gas charging flow to the flow deviation comparison submodule 83b, the flow deviation comparison submodule compares the gas charging flow with the flow difference to obtain the flow deviation and sends the flow deviation to the control submodule 83e, when the control submodule 83e judges that the flow deviation meets the set flow error range, the total flow calculation submodule 83c adds the gas charging flow and the gas inlet flow to obtain the actual total gas flow and sends the actual total gas flow to the total flow deviation comparison submodule 83d, the total flow deviation comparison submodule 83d compares the actual total gas flow with the target flow correction value to obtain the total flow deviation, and sends the total flow deviation to the control submodule 83e, and the control submodule 83e sends a closing control command to the inflation controller 9 when judging that the total flow deviation satisfies the error range of the set target flow correction value, and the inflation controller 9 controls the inflation device 6 to close. At this time, the flow rate in the muffler assembly 1 is such that the moving sound wave effect of a large-displacement automobile can be achieved, and in order to further improve the moving sound wave effect, the control submodule 83e also controls the opening degree of the tuning valve 10, and obtains different sound wave effects by adjusting the opening degree of the tuning valve 10, thereby meeting the requirements of users. Otherwise, when the flow deviation does not meet the set flow error range and the inflation flow is smaller than the flow difference value or the total flow deviation does not meet the set total flow error range and the actual total gas flow is smaller than the target flow correction value, the inflation equipment 6 is controlled to continue to inflate. Generally, under the real-time monitoring of the inflation flow sensor 5, the flow deviation and the total flow deviation do not exceed the set positive error range of the flow, and in order to improve the reliability of the control, the inflation device 6 may be controlled to stop the inflation when the flow deviation does not satisfy the set positive error range of the flow but the inflation flow is greater than the flow difference, or the total flow deviation does not satisfy the set positive error range of the total flow but the actual total gas flow is greater than the target flow correction value.
As shown in fig. 3 and 4, the method for actively generating sound by the exhaust muffler assembly 1 includes the following steps:
firstly, setting a selection key 11 for turning on or off the sound wave function of the automobile movement; when the sport sound wave function is started when the selection button is selected, the target flow for achieving the sound wave effect is obtained according to the selected driving mode; in order to enable the moving sound waves to realize different moving sound waves of the full-driving mileage under the comprehensive road condition, vehicle driving parameters under the driving mode are obtained, wherein the vehicle driving parameters comprise an engine rotating speed signal, an accelerator opening degree signal, an actual gear signal, an ignition switch state signal and an environment temperature signal; correcting the target flow according to the vehicle running parameters so as to obtain a target flow correction value in a corresponding driving mode; in the running process of a vehicle, the intake flow sensor 4 acquires and obtains the intake flow discharged by an engine in an intake pipe 2 of the silencer assembly 1 in real time, then the intake flow is compared with the target flow, when the intake flow is smaller than the target flow, the inflating device 6 is controlled to inflate the silencer assembly 1, meanwhile, the inflating flow sensor 5 monitors the inflating flow generated by the inflating device 6 in real time, and whether the inflating device 6 stops working is controlled according to the comparison result of the sum of the inflating flow and the intake flow and the target flow, and the specific operation comprises the following steps:
acquiring a flow difference value of the intake flow compared with a target flow correction value;
comparing the inflation flow monitored by the inflation flow sensor 5 in real time with the flow difference to obtain flow deviation, and adding the inflation flow and the intake flow collected by the intake flow sensor 4 when the flow deviation meets a set flow error range to obtain actual total gas flow;
comparing the actual total gas flow with the target flow correction value to obtain a total flow deviation, judging that the actual total gas flow meets the requirement when the total flow deviation meets a set total flow error range, controlling the inflation equipment 6 to stop working, and then controlling the tone tuning valve 10 at the outlet pipe of the silencer assembly 1 to adjust the opening according to the driving mode and the vehicle running parameters;
conversely, when the flow deviation does not satisfy the set flow error range or the total flow deviation does not satisfy the set total flow error range, the inflation device 6 is controlled to continue the inflation.
The method for actively sounding the exhaust silencer assembly 1 is realized based on each part of the system for actively sounding the exhaust silencer assembly 1. The operation of the system for actively generating sound of the exhaust muffler assembly 1 has been described above, and the operation of the method for actively generating sound of the exhaust muffler assembly 1 will not be repeated.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims (10)

1. The active sounding system of the exhaust silencer assembly comprises an air inlet pipeline (2) and an air outlet pipeline (3) which are connected to a silencer assembly (1), and is characterized in that the air inlet pipeline (2) is provided with an air inlet flow sensor (4) used for monitoring the air inlet flow discharged by an engine in the air inlet pipeline (2), the silencer assembly (1) is further connected with an air charging pipeline (7) and an air charging device (6) connected with the air charging pipeline (7), the active sounding system of the exhaust silencer assembly further comprises a sound wave control unit (8), the air inlet flow sensor (4) and the air charging device (6) are both connected with the sound wave control unit (8), the sound wave control unit (8) is used for acquiring a target flow capable of achieving a sound wave effect according to a selected driving mode, and then controlling the air charging device (6) according to a comparison result of the target flow and the air inlet flow acquired by the air inlet flow sensor (4) ) Whether it is on or not.
2. The active sounding system of the exhaust silencer assembly according to claim 1, wherein an inflation flow sensor (5) for monitoring the inflation flow in the inflation pipe (7) is disposed on the inflation pipe (7), the inflation flow sensor (5) is connected to a sound wave control unit (8), and the sound wave control unit (8) is configured to control whether the inflator (6) is turned off according to the inflation flow monitored by the inflation flow sensor (5).
3. The system for active sounding of an exhaust muffler assembly according to claim 2, wherein the sound wave control unit (8) comprises:
the target flow storage module (81) is used for storing target flow which can achieve the sound wave effect in different driving modes;
the driving parameter acquisition module (84) is used for acquiring vehicle driving parameters under each driving mode, wherein the vehicle driving parameters comprise an engine rotating speed signal, an accelerator opening degree signal, an actual gear signal, an ignition switch state signal and an environment temperature signal;
the target flow correction module (85) is used for correcting the target flow in the target flow storage module (81) according to the vehicle running parameters so as to obtain a target flow correction value in the corresponding driving mode;
the preset flow obtaining module (82) is used for obtaining a corresponding target flow correction value according to the currently selected driving mode and the vehicle running parameters;
and the control module (83) is used for controlling the air charging equipment (6) to charge air to the silencer assembly (1) when the air inflow collected by the air inflow sensor (4) is smaller than the target flow, and controlling whether the air charging equipment (6) stops working or not according to the comparison result of the sum of the air charging flow and the air inflow and the target flow correction value.
4. The system of claim 3, wherein the control module (83) comprises:
the total flow calculation submodule (83c) is used for adding the inflation flow monitored by the inflation flow sensor (5) in real time and the intake flow collected by the intake flow sensor (4) so as to obtain the actual total gas flow;
a total flow deviation comparison submodule (83d) for comparing the actual total gas flow with the target flow correction value to obtain a total flow deviation;
and the control sub-module (83e) is used for judging that the actual total gas flow meets the requirement and controlling the inflation equipment to stop working when the total flow deviation meets the error range of the target flow correction value.
5. The system of claim 4, wherein the control module (83) further comprises:
a difference comparison submodule (83a) for obtaining a flow difference between the intake flow and the target flow correction value;
the flow deviation comparison submodule (83b) is used for comparing the inflation flow monitored by the inflation flow sensor (5) in real time with a flow difference value to obtain flow deviation;
and a control submodule (83e) for controlling the total flow calculation submodule (83c) to add the charging flow and the intake flow when the flow deviation satisfies a set flow error range.
6. The active sounding system of an exhaust silencer assembly according to any one of claims 1 to 5, characterized in that a tuning valve (10) is arranged on the air outlet pipe (3), and the sound wave control unit (8) is connected with the tuning valve (10); the sound wave control unit (8) is also connected with a selection key (11) for turning on or off the sound wave function of the automobile movement and an inflation controller (9) for controlling the inflation equipment (6) to stop or start inflation.
7. A method for actively sounding an exhaust muffler assembly, comprising the steps of:
acquiring target flow for achieving a sound wave effect according to the selected driving mode;
the method comprises the steps that the air inflow flow discharged by an engine in an air inlet pipeline (2) of a silencer assembly (1) is acquired in real time through an air inflow sensor (4);
comparing the intake flow with the target flow, and controlling the inflating equipment (6) to inflate the muffler assembly (1) when the intake flow is smaller than the target flow;
the inflation flow generated by the inflation equipment (6) is monitored in real time through the inflation flow sensor (5), and whether the inflation equipment (6) stops working or not is controlled according to a comparison result of the sum of the inflation flow and the intake flow and the target flow.
8. The method of claim 7, wherein after obtaining the target flow rate for achieving the sound wave effect according to the selected driving mode, the target flow rate is corrected according to the vehicle driving parameters in the driving mode, and the correcting operation comprises:
acquiring vehicle running parameters under the driving mode, wherein the vehicle running parameters comprise an engine rotating speed signal, an accelerator opening signal, an actual gear signal, an ignition switch state signal and an environment temperature signal;
and correcting the target flow according to the vehicle running parameters so as to obtain a target flow correction value under the corresponding driving mode.
9. The method of claim 8, wherein the operation of controlling whether the inflator (6) stops operating according to the comparison result of the sum of the charging flow rate and the intake flow rate with the target flow rate includes:
acquiring a flow difference value of the intake flow compared with a target flow correction value;
comparing the inflation flow monitored in real time by the inflation flow sensor (5) with the flow difference to obtain flow deviation, and adding the inflation flow and the intake flow collected by the intake flow sensor (4) when the flow deviation meets a set flow error range to obtain actual total gas flow;
and comparing the actual total gas flow with the target flow correction value to obtain a total flow deviation, judging that the actual total gas flow meets the requirement when the total flow deviation meets the set total flow error range, and controlling the inflation equipment (6) to stop working.
10. The method for actively generating sound through an exhaust silencer assembly according to claim 9, wherein the opening of the tuning valve (10) at the outlet pipe of the silencer assembly (1) is controlled to be adjusted according to the driving mode and the vehicle running parameters while the actual total gas flow is determined to meet the requirements and the inflator (6) is controlled to stop working.
CN202111061586.9A 2021-09-10 2021-09-10 System and method for actively sounding exhaust silencer assembly Active CN113847118B (en)

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