CN114718780A - Method and system for reducing noise and vehicle - Google Patents
Method and system for reducing noise and vehicle Download PDFInfo
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- CN114718780A CN114718780A CN202110015254.0A CN202110015254A CN114718780A CN 114718780 A CN114718780 A CN 114718780A CN 202110015254 A CN202110015254 A CN 202110015254A CN 114718780 A CN114718780 A CN 114718780A
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000001514 detection method Methods 0.000 claims description 12
- 239000002826 coolant Substances 0.000 claims description 8
- 230000009467 reduction Effects 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 abstract description 31
- 239000000446 fuel Substances 0.000 description 19
- 238000010586 diagram Methods 0.000 description 9
- 238000004590 computer program Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 5
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- 230000009471 action Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
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- 230000003247 decreasing effect Effects 0.000 description 3
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1205—Flow throttling or guiding
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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
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- 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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- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
The embodiment of the application provides a method and a system for reducing noise and a vehicle, and belongs to the technical field of vehicles. The method comprises the following steps: detecting the working state of the vehicle; and under the condition that the working state of the vehicle is identified to be an idling state, controlling the opening degree of a throttle valve connected with an engine of the vehicle to be reduced to a preset opening degree, wherein the engine is a diesel engine. By using the method, the system and the vehicle for reducing the noise, the energy generated by combustion can not excite the vibration frequency on the structure of the engine, so that the resonance phenomenon is avoided, and the combustion noise is reduced.
Description
Technical Field
The embodiment of the application relates to the technical field of vehicles, in particular to a method and a system for reducing noise and a vehicle.
Background
NVH performance (Noise, Vibration, Harshness), namely, Noise, Vibration and Harshness of the vehicle, is a comprehensive problem for measuring the manufacturing quality of the vehicle, and the quality of the NVH performance is already regarded as one of the important conditions for vehicle selection by users.
In a diesel engine, the pressure of gas in a cylinder generated by combustion of mixed gas directly excites a corresponding engine structure, the gas is transmitted to the surface of the engine through transmission paths such as transmission of the engine structure or air transmission, and air sound formed on the surface of the engine is combustion noise.
At present, the noise generated by a diesel engine under an idling working condition is large, so that the experience of a user is poor.
Disclosure of Invention
The embodiment of the application provides a method and a system for reducing noise and a vehicle, and aims to solve the problem of high noise under an idling working condition.
A first aspect of an embodiment of the present application provides a method for reducing noise, where the method includes:
detecting the working state of the vehicle;
and under the condition that the working state of the vehicle is identified to be an idling state, controlling the opening degree of a throttle valve connected with an engine of the vehicle to be reduced to a preset opening degree, wherein the engine is a diesel engine.
Optionally, a value of the preset opening degree is greater than or equal to 6% and less than or equal to 16%.
Optionally, the preset opening degree is determined by:
detecting the sound intensity of the engine under different opening degrees of the throttle valve when the vehicle is in an idle state;
counting the sound intensity emitted by the engine under different opening degrees of the throttle valve to obtain a target opening degree corresponding to the situation that the sound intensity emitted by the engine is smaller than a preset sound intensity;
and taking the target opening degree as the preset opening degree.
Optionally, detecting the sound intensity of the engine at different opening degrees of the throttle valve, further comprises:
detecting the vibration intensity of the engine under different opening degrees of the throttle valve;
obtaining a target opening corresponding to the condition that the sound intensity emitted by the engine is smaller than a preset sound intensity, wherein the target opening comprises the following steps:
and obtaining the corresponding target opening when the sound intensity emitted by the engine is smaller than the preset sound intensity and the vibration intensity is smaller than the preset vibration intensity.
Optionally, the method further comprises: and increasing the temperature of the engine coolant while reducing the opening degree of a throttle valve of the vehicle until the temperature of the engine coolant is higher than a preset temperature.
A second aspect of an embodiment of the present application provides a system for reducing noise, where the system includes:
the detection module is used for detecting the working state of the vehicle;
the control module is used for controlling the opening degree of a throttle valve connected with an engine of the vehicle to be reduced to a preset opening degree under the condition that the working state of the vehicle is identified to be an idling state, wherein the engine is a diesel engine.
Optionally, a value of the preset opening degree is greater than or equal to 6% and less than or equal to 16%.
Optionally, the control module comprises:
the sound intensity detection module is used for detecting the sound intensity of the engine under different opening degrees of the throttle valve when the vehicle is in an idle state;
the statistical module is used for carrying out statistics on the sound intensity emitted by the engine under different opening degrees of the throttle valve to obtain a target opening degree corresponding to the situation that the sound intensity emitted by the engine is smaller than a preset sound intensity;
and the first determining module is used for taking the target opening degree as the preset opening degree.
Optionally, the sound intensity detection module includes:
the vibration detection module is used for detecting the vibration intensity of the engine under different opening degrees of the throttle valve;
the statistic module comprises: and the second determination module is used for obtaining the corresponding target opening degree when the sound intensity emitted by the engine is smaller than the preset sound intensity and the vibration intensity is smaller than the preset vibration intensity.
A third aspect of embodiments of the present application provides a vehicle including a system for reducing noise as provided in the second aspect of embodiments of the present application.
By adopting the method for reducing the noise, when the vehicle is identified to be in the idle state, the opening degree of the throttle valve of the vehicle engine is controlled to be the preset opening degree, and the opening degree of the throttle valve at the moment can be different from the opening degree of the throttle valve of the vehicle in the idle state in the prior art. When the current opening of the throttle valve is the preset opening, gas entering the diesel engine can be changed, so that the combustion speed of fuel in the diesel engine is changed, the energy generated during fuel combustion is reduced, the energy generated during fuel combustion cannot excite the vibration frequency generated at the positions of a lower timing cover cap and the like on the diesel engine, the resonance phenomenon is reduced, the combustion noise is reduced at the source, and the user experience is improved. For example, in the prior art, the opening degree of a throttle valve of a vehicle in an idle state is 100%, and the opening degree of the throttle valve can be reduced, so that air entering an engine is reduced, energy generated during fuel combustion is reduced, and after the energy generated during fuel combustion is reduced, structures at positions such as a lower timing cover on a diesel engine are not sufficiently excited, so that a resonance phenomenon is reduced, and user experience is improved.
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In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a flow chart illustrating steps of a method for reducing noise according to an embodiment of the present application;
FIG. 2 is a graph illustrating the relationship between throttle opening and sound intensity emitted from an engine according to an embodiment of the present disclosure;
FIG. 3 is a graph illustrating the relationship between the opening degree of a throttle valve and the intensity of vibration generated by an engine according to an embodiment of the present disclosure;
FIG. 4 is a graph showing a relationship between a crank angle and a cylinder pressure before a throttle opening is not decreased according to an embodiment of the present application;
fig. 5 is a diagram showing a relationship between a crank angle after a reduction in the throttle opening degree and a cylinder pressure according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the related art, noise generated by the diesel engine is large under an idle condition, and therefore, the applicant has studied the cause of the noise generated by the diesel engine under the idle condition.
Firstly, the applicant finds that the vibration frequency generated by fuel combustion in the diesel engine is in the range of the middle-frequency band frequency and the high-frequency band frequency under the idling working condition of the diesel engine, the middle-frequency band frequency range is between 300Hz and 1000Hz, and the high-frequency band frequency range is above 1000 Hz; secondly, the applicant carries out modal calculation analysis on the diesel engine and finds that the lower timing cover of the diesel engine can generate vibration with the frequency of 500 Hz-700 Hz; the connecting part of the oil sump timing side of the diesel engine and the oil pump can generate vibration with the frequency of 1000 Hz-1700 Hz; the vibration with the frequency of 1100Hz-1400Hz is generated on the timing side of the diesel engine; vibrations with a frequency of 1700Hz are generated at the intake and exhaust ends of the diesel engine.
Because two objects with similar frequencies are needed for generating the resonance phenomenon, the frequency range of the middle frequency band generated by fuel combustion is within 300Hz to 1000Hz, and the resonance can be generated between the vibration with the frequency of 500Hz to 700Hz generated by the lower timing cover of the diesel engine; the high-frequency range frequency generated by fuel combustion is above 1000Hz, and the high-frequency range frequency can generate resonance with the joint of the oil sump timing side of the diesel engine and the oil pump, the timing side of the diesel engine, and the space between the air inlet end and the air outlet end of the diesel engine (the vibration frequency is above 1000 Hz). The generation of resonance in the middle and high frequency ranges generates a large combustion noise.
Based on this, the present application designs a method for reducing noise, applied to a diesel engine, the method comprising: detecting the working state of the vehicle; and under the condition that the working state of the vehicle is identified to be an idling state, controlling the opening degree of a throttle valve connected with an engine of the vehicle to be a preset opening degree, wherein the engine is a diesel engine.
By controlling the opening degree of the throttle valve of the vehicle engine to be the preset opening degree when the vehicle is identified to be in the idle state, the opening degree of the throttle valve at the moment can be reduced from the opening degree of the throttle valve in the idle state of the vehicle in the prior art. When the current aperture of air throttle reduces to predetermineeing the aperture, then can change the gas that enters into in the diesel engine to reduce the produced energy of fuel burning in the diesel engine, make the produced energy of fuel burning be not enough to encourage the produced vibration frequency of lower timing shroud isotopose position on the diesel engine, with reduced resonance phenomenon, and then reduced combustion noise in the source, promoted user experience and felt.
Example one
Referring to fig. 1, there is shown a method of reducing noise, the method comprising:
step S1: the operating state of the vehicle is detected.
In this step, the vehicle has a plurality of operating states, for example, an acceleration state, a deceleration state, an idling state, and the like. In the idle state of a vehicle using a diesel engine, noise is generated greatly, and therefore, it is necessary to detect the operating state of the vehicle to detect whether the vehicle is in the idle state, and then perform subsequent execution steps after the vehicle is in the idle state.
The idling state refers to an operating condition of a diesel engine of a vehicle when idling.
Step S2: and under the condition that the working state of the vehicle is identified to be an idling state, controlling the opening degree of a throttle valve connected with an engine of the vehicle to be reduced to a preset opening degree, wherein the engine is a diesel engine.
In this step, when the vehicle is identified to be in the idle state, the opening degree of the throttle valve may be reduced to a preset opening degree, and a value of the preset opening degree may be in an interval greater than or equal to 6% and less than or equal to 16%.
For example, in the conventional scheme, when the vehicle is in an idle state, the throttle valve on the diesel engine is at an opening degree of 100%, and the resonance phenomenon is generated at this time; after the scheme of the application is used, the throttle opening degree of the diesel engine can be reduced to be in the interval of 6-16% when the vehicle is in an idling state. Therefore, the gas entering the diesel engine is reduced, the combustion speed of the fuel is reduced, for example, the vibration intensity generated by the fuel combustion at the middle-frequency vibration frequency of 300 Hz-1000 Hz is reduced to the vibration intensity/energy generated by avoiding resonance, or the vibration intensity generated by the fuel combustion at the high-frequency vibration frequency of more than 1000Hz is reduced to the vibration intensity generated by avoiding resonance, and the like, after the vibration intensity at the frequency bands is reduced, the structure of the diesel engine is not sufficiently excited to vibrate, so that the resonance phenomenon between the structure and the corresponding structure on the engine body is avoided, and the combustion noise is greatly reduced. In addition, since it is not necessary to introduce a large amount of gas to maintain the normal running of the vehicle when the vehicle is in the idle state, the vehicle is not affected even after the throttle opening is reduced from 100% to 6% to 16%.
In addition, the applicant has also found that, in addition to resonating with some structures on the diesel engine, the combustion of the fuel itself produces a relatively noticeable in-cylinder combustion noise similar to a rata.
The intake of gas into the diesel engine can be reduced based on the reduction of the throttle opening, thereby reducing the energy generated by the combustion of the fuel itself per unit time to reduce the in-cylinder combustion noise of the rata generated by the combustion of the fuel.
Wherein, the step S2 may include the following sub-steps:
substep S21: and detecting the sound intensity of the engine under different opening degrees of the throttle valve when the vehicle is in an idle state.
In this step, the relationship between the throttle opening degree and the engine sound intensity shown with reference to fig. 2 can be obtained by changing the opening degree of the throttle valve, for example, gradually decreasing the opening degree of the throttle valve from 100% to 9% while the vehicle is in the idling state.
When the vehicle is in an idle state, the sound intensity of the engine of the throttle valve under different opening degrees can be detected, and the vibration intensity of the engine of the throttle valve under different opening degrees can also be detected.
Substep S22: and counting the sound intensity emitted by the engine under different opening degrees of the throttle valve to obtain the corresponding target opening degree when the sound intensity emitted by the engine is smaller than the preset sound intensity.
In this step, referring to fig. 2, it is found that, in the process of reducing the throttle opening, when the throttle opening is in the range of 16% to 100%, the sound intensity of the engine is basically in a steady and unchanging state; when the throttle opening is in the interval of 10% to 16%, the sound intensity of the engine increases with the increase of the throttle opening; when the throttle opening is less than 10%, the sound intensity of the engine increases with the decrease in the throttle opening, and the operation of the engine becomes unstable.
Here, referring to fig. 2, the preset sound intensity may be 71.1dB, at which the corresponding target opening degree is 16%.
In addition, in this step, a target opening degree corresponding to the case where the sound intensity emitted by the engine is smaller than a preset sound intensity and the vibration intensity is smaller than a preset vibration intensity may also be obtained. The relationship between the opening degree of the throttle valve and the vibration intensity of the engine shown with reference to fig. 3 can be obtained by changing the opening degree of the throttle valve, for example, gradually decreasing the opening degree of the throttle valve from 100% to 9% while the vehicle is in the idling state.
Referring to fig. 2 and 3, if the preset sound intensity of the engine is 71.1dB and the preset vibration intensity of the engine is 0.85g, when the sound intensity of the engine is less than 71.1dB and the vibration intensity of the engine is less than 0.85g, the opening degree of the throttle valve is 16%, and 16% is the target opening degree.
In this step, since there are a plurality of the obtained sound intensities emitted by the engine that are smaller than the preset sound intensity and a plurality of the obtained vibration intensities emitted by the engine that are smaller than the preset vibration intensity, there are a plurality of different target opening degrees corresponding to the engine naturally based on different sound intensities and vibration intensities. The number of different target opening degrees may include a throttle opening degree of 16%, a throttle opening degree of 13%, or a throttle opening degree of 10%.
In the present application, the combustion state of fuel in the diesel engine can be changed with a plurality of target opening degrees as the preset opening degrees, and the effect of reducing combustion noise can be achieved.
Substep S23: and taking the target opening degree as the preset opening degree.
In this step, the throttle opening may be adjusted when the vehicle is in an idle state by setting the target opening to an opening of 16% or less as a preset opening.
However, since the engine starts to operate unstably after the target opening is reduced to less than 10%, the throttle opening can be controlled within the range of 10% to 16% in the idle state, thereby reducing the occurrence of the resonance phenomenon and reducing the combustion noise without affecting the operation of the engine.
Referring to fig. 2 and 3, it can be seen that in the interval of 10% to 16%, as the throttle opening degree increases, the intensity of sound emitted from the engine and the intensity of vibration emitted from the engine gradually increase, and thus, the combustion noise is generated more. Based on the consideration of the optimal noise reduction effect, when the opening degree of the throttle valve is adjusted to 10%, the sound intensity and the vibration intensity emitted by the engine are both in the lowest state, and the noise reduction effect of the vehicle in the idle state is optimal.
Taking an example of a 10% opening, referring to fig. 4, which shows a relationship between a crank angle and a cylinder pressure before the throttle opening is not changed, that is, in a case where the throttle opening is 100%, it can be seen that a maximum value of the cylinder pressure in the engine cylinder is about 40 bar; after the throttle opening is changed, that is, after the throttle opening is changed from 100% to 10%, referring to fig. 5, the maximum value of the cylinder pressure in the engine cylinder is about 27bar, and the air pressure in the engine cylinder is significantly reduced, so that the intensity of the engine vibration is reduced. Under the condition that the opening of the throttle valve is 10%, the vibration intensity of fuel combustion at the middle-frequency and high-frequency vibration frequency can be greatly reduced, so that most surface structures of the diesel engine are not excited, the resonance phenomenon of the surface structures of the most part of the diesel engine is avoided, the combustion noise is reduced, and the user experience is improved.
In the above steps, it is emphasized that combustion noise can be reduced for a vehicle using a diesel engine as a power source based on a reduction in the opening degree of a throttle valve in an idle state, and after the reduction in the opening degree of the throttle valve, adjustment involving the temperature of a coolant of the diesel engine is required in order to ensure normal operation of the diesel engine.
Therefore, in order to ensure the normal operation of the diesel engine, a method of reducing noise further includes: and increasing the temperature of the cooling liquid of the engine while reducing the opening degree of a throttle valve of the vehicle until the temperature of the cooling liquid of the engine is higher than a preset temperature. For example, the preset temperature may be 50 ℃.
In the present embodiment, if the temperature of the coolant of the diesel engine is low, the torque demand of the diesel engine is increased, and more gas is required to supply the fuel in the diesel engine at this time.
Therefore, the opening degree of the throttle valve is reduced, the temperature of the cooling liquid of the diesel engine can be increased, the torque requirement of the diesel engine is smaller, the air inflow required by the diesel engine is smaller, and the normal work of the diesel engine is further met.
Example two
Based on the same inventive concept, another embodiment of the present application provides a system for reducing noise, the system comprising:
the detection module is used for detecting the working state of the vehicle;
the control module is used for controlling the opening degree of a throttle valve connected with an engine of the vehicle to be reduced to a preset opening degree under the condition that the working state of the vehicle is identified to be an idling state, wherein the engine is a diesel engine.
In a possible implementation manner, the preset opening value is greater than or equal to 10% and less than or equal to 16%.
In one possible embodiment, the control module comprises:
the sound intensity detection module is used for detecting the sound intensity of the engine under different opening degrees of the throttle valve when the vehicle is in an idle state;
the statistical module is used for carrying out statistics on the sound intensity emitted by the engine under different opening degrees of the throttle valve to obtain a target opening degree corresponding to the situation that the sound intensity emitted by the engine is smaller than a preset sound intensity;
and the first determining module is used for taking the target opening degree as the preset opening degree.
In one possible embodiment, the sound intensity detection module includes:
the vibration detection module is used for detecting the vibration intensity of the engine under different opening degrees of the throttle valve;
the statistic module comprises: and the second determination module is used for obtaining the corresponding target opening degree when the sound intensity emitted by the engine is smaller than the preset sound intensity and the vibration intensity is smaller than the preset vibration intensity.
In one possible embodiment, the system further comprises:
the temperature raising module is used for raising the temperature of the engine coolant while reducing the opening degree of a throttle valve of the vehicle until the temperature of the engine coolant is higher than a preset temperature.
EXAMPLE III
Based on the same inventive concept, another embodiment of the present application provides a vehicle including a system for reducing noise as provided in the second embodiment of the present application.
In the present embodiment, the vehicle is mainly a vehicle powered by a diesel engine, for example, a tractor or the like.
For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one of skill in the art, embodiments of the present application may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present application have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the true scope of the embodiments of the application.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The method, the system and the vehicle for reducing noise provided by the present application are described in detail above, and specific examples are applied herein to illustrate the principles and embodiments of the present application, and the description of the above embodiments is only used to help understand the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A method of reducing noise, the method comprising:
detecting the working state of the vehicle;
and under the condition that the working state of the vehicle is identified to be an idling state, controlling the opening degree of a throttle valve connected with an engine of the vehicle to be reduced to a preset opening degree, wherein the engine is a diesel engine.
2. The method of claim 1, wherein the preset opening is greater than or equal to 6% and less than or equal to 16%.
3. The method for reducing noise according to claim 1 or 2,
determining the preset opening degree by:
detecting the sound intensity of the engine under different opening degrees of the throttle valve when the vehicle is in an idle state;
counting the sound intensity emitted by the engine under different opening degrees of the throttle valve to obtain a target opening degree corresponding to the situation that the sound intensity emitted by the engine is smaller than a preset sound intensity;
and taking the target opening degree as the preset opening degree.
4. The method of reducing noise according to claim 3, wherein detecting the sound intensity of the engine at different opening degrees of the throttle valve further comprises:
detecting the vibration intensity of the engine under different opening degrees of the throttle valve;
obtaining a target opening corresponding to the condition that the sound intensity emitted by the engine is smaller than a preset sound intensity, wherein the target opening comprises the following steps:
and obtaining the corresponding target opening when the sound intensity emitted by the engine is smaller than the preset sound intensity and the vibration intensity is smaller than the preset vibration intensity.
5. The method of reducing noise according to claim 1, further comprising:
and increasing the temperature of the engine coolant while reducing the opening degree of a throttle valve of the vehicle until the temperature of the engine coolant is higher than a preset temperature.
6. A system for reducing noise, the system comprising:
the detection module is used for detecting the working state of the vehicle;
the control module is used for controlling the opening degree of a throttle valve connected with an engine of the vehicle to be reduced to a preset opening degree under the condition that the working state of the vehicle is identified to be an idling state, wherein the engine is a diesel engine.
7. The system of claim 6, wherein the predetermined opening is greater than or equal to 6% and less than or equal to 16%.
8. The system for reducing noise of claim 6 or 7, wherein the control module comprises:
the sound intensity detection module is used for detecting the sound intensity of the engine under different opening degrees of the throttle valve when the vehicle is in an idle state;
the statistical module is used for carrying out statistics on the sound intensity emitted by the engine under different opening degrees of the throttle valve to obtain a target opening degree corresponding to the situation that the sound intensity emitted by the engine is smaller than a preset sound intensity;
and the first determining module is used for taking the target opening degree as the preset opening degree.
9. The noise reduction system of claim 8, wherein the sound intensity detection module comprises:
the vibration detection module is used for detecting the vibration intensity of the engine under different opening degrees of the throttle valve;
the statistic module comprises: and the second determination module is used for obtaining the corresponding target opening degree when the sound intensity emitted by the engine is smaller than the preset sound intensity and the vibration intensity is smaller than the preset vibration intensity.
10. A vehicle comprising a system for reducing noise according to any one of claims 6 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110015254.0A CN114718780B (en) | 2021-01-06 | 2021-01-06 | Method and system for reducing noise and vehicle |
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| CN202110015254.0A CN114718780B (en) | 2021-01-06 | 2021-01-06 | Method and system for reducing noise and vehicle |
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| CN114718780A true CN114718780A (en) | 2022-07-08 |
| CN114718780B CN114718780B (en) | 2024-04-16 |
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| CN202110015254.0A Active CN114718780B (en) | 2021-01-06 | 2021-01-06 | Method and system for reducing noise and vehicle |
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| EP0470656A1 (en) * | 1990-08-10 | 1992-02-12 | General Motors Corporation | Method and apparatus for attenuating engine noise |
| JPH11294192A (en) * | 1998-04-16 | 1999-10-26 | Toyota Motor Corp | Intake throttle valve control method and control device for diesel engine |
| JP2000080930A (en) * | 1998-09-08 | 2000-03-21 | Nissan Motor Co Ltd | Throttle control unit for electrically controlled throttle type internal combustion engine |
| CN102979636A (en) * | 2012-12-21 | 2013-03-20 | 潍柴动力股份有限公司 | Method and device for reducing vibration of power assembly system under idling condition |
| CN106704014A (en) * | 2015-07-29 | 2017-05-24 | 长城汽车股份有限公司 | Combustion noise control method and system of supercharged diesel oil internal combustion engine and vehicle |
| CN107559096A (en) * | 2016-06-30 | 2018-01-09 | 长城汽车股份有限公司 | Diesel engine control method and system |
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Patent Citations (6)
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| EP0470656A1 (en) * | 1990-08-10 | 1992-02-12 | General Motors Corporation | Method and apparatus for attenuating engine noise |
| JPH11294192A (en) * | 1998-04-16 | 1999-10-26 | Toyota Motor Corp | Intake throttle valve control method and control device for diesel engine |
| JP2000080930A (en) * | 1998-09-08 | 2000-03-21 | Nissan Motor Co Ltd | Throttle control unit for electrically controlled throttle type internal combustion engine |
| CN102979636A (en) * | 2012-12-21 | 2013-03-20 | 潍柴动力股份有限公司 | Method and device for reducing vibration of power assembly system under idling condition |
| CN106704014A (en) * | 2015-07-29 | 2017-05-24 | 长城汽车股份有限公司 | Combustion noise control method and system of supercharged diesel oil internal combustion engine and vehicle |
| CN107559096A (en) * | 2016-06-30 | 2018-01-09 | 长城汽车股份有限公司 | Diesel engine control method and system |
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