CN111688581B - Exterior rearview mirror for vehicle and system for reducing wind noise of exterior rearview mirror - Google Patents
Exterior rearview mirror for vehicle and system for reducing wind noise of exterior rearview mirror Download PDFInfo
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- CN111688581B CN111688581B CN202010615506.9A CN202010615506A CN111688581B CN 111688581 B CN111688581 B CN 111688581B CN 202010615506 A CN202010615506 A CN 202010615506A CN 111688581 B CN111688581 B CN 111688581B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
- B60R1/02—Rear-view mirror arrangements
- B60R1/06—Rear-view mirror arrangements mounted on vehicle exterior
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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
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/82—Elements for improving aerodynamics
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- Rear-View Mirror Devices That Are Mounted On The Exterior Of The Vehicle (AREA)
Abstract
The invention provides an exterior rear view mirror for a vehicle and a system for reducing the wind noise of the exterior rear view mirror. The outer rearview mirror comprises a rearview mirror shell and a rearview mirror base used for connecting the rearview mirror shell to a vehicle body of a vehicle, wherein the outer surface of the rearview mirror base is coated with a multi-layer film structure with a changeable shape; the multilayer film structure is configured to be tightly attached to the outer surface of the rearview mirror base when the vehicle speed is lower than a preset speed, and the shape of the multilayer film structure is adjusted according to the vehicle speed and the noise in the vehicle when the vehicle speed is higher than or equal to the preset speed, so that the airflow flowing through the external rearview mirror is guided to flow below the window of the vehicle. The scheme of the invention can meet the requirements of beauty and wind noise reduction, realizes the requirements of not influencing the beauty of the rearview mirror at low speed and reducing the wind noise at high speed, and meets the requirements of wind noise optimization at different vehicle speeds.
Description
Technical Field
The invention relates to the technical field of vehicle wind noise reduction, in particular to an external rearview mirror for a vehicle and a system for reducing the wind noise of the external rearview mirror.
Background
With the development of automotive technology, ride comfort is widely concerned, and wind noise complaints are often ranked top three among customer complaints. The wind tunnel test result shows that when the vehicle speed is more than 60km/h, the external rearview mirror is one of the main reasons for causing wind noise.
The rearview mirror base is a triangular plate or a quadrilateral plate which is connected between the rearview mirror shell and the vehicle body. The existing rearview mirror base is mostly designed to meet the requirement of attractiveness, and the structure for reducing wind noise cannot be added on the base, such as a vortex generator and a local streamline design, or the existing rearview mirror base can only meet wind noise optimization at a certain vehicle speed and cannot meet wind noise performance optimization at various vehicle speeds, and then, a plurality of vehicle types can cause phenomena of wind noise or wind noise abnormal noise and the like due to the fact that airflow flowing through the rearview mirror base impacts a side window when the vehicle speed is at a certain vehicle speed. Therefore, the wind noise can be reduced at different vehicle speeds, the requirement of the rearview mirror base on attractive structure can be met, and the technical problem in the prior art is solved.
Disclosure of Invention
The inventor of the application finds that in the prior art, the method of increasing protruding features and the like in the shape is mostly adopted for reducing the wind noise problem of the rearview mirror, and if the turbulence ribs are added on the mirror shell and the base of the rearview mirror, the noise reduction effect is further improved. However, the surface shape of the base of the rearview mirror is fixed, and the surface shape cannot be automatically changed according to different vehicle speeds and the conditions of noise in the vehicle, so that the requirement for optimizing the wind noise performance at each vehicle speed cannot be met.
One purpose of the invention is to overcome the problem that the existing rearview mirror base cannot meet the requirements of both beauty and wind noise reduction.
A further object of the present invention is to achieve the need for a low speed rearview mirror that does not affect the aesthetics of the mirror, and a high speed rearview mirror that reduces wind noise.
A further object of the present invention is to solve the technical problem of prior art that the wind noise can only be optimized at a certain vehicle speed.
In particular, the invention provides an external rear-view mirror for a vehicle, comprising a rear-view mirror housing and a rear-view mirror base for connecting the rear-view mirror housing to a vehicle body of the vehicle, wherein the outer surface of the rear-view mirror base is coated with a multi-layer film structure capable of changing the shape;
the multilayer film structure is configured to be tightly attached to the outer surface of the rearview mirror base when the vehicle speed is lower than a preset speed, and the shape of the multilayer film structure is adjusted according to the vehicle speed and the noise in the vehicle when the vehicle speed is higher than or equal to the preset speed, so that the airflow flowing through the external rearview mirror is guided to flow below the window of the vehicle.
Optionally, the multilayer film structure is configured to be capable of generating streamline shapes in different directions under different vehicle speeds and different in-vehicle noises when the vehicle speed is higher than or equal to the preset speed.
Optionally, the multilayer film structure consists of a plurality of layers of inflatable films which are sequentially stacked from inside to outside, and the plurality of layers of inflatable films are configured to be capable of being expanded into a streamline shape in an inflated state;
optionally, each layer of the inflatable membrane is configured to be capable of being deployed into a streamlined shape in an inflated state.
Optionally, the plurality of inflatable membranes are arranged to allow only one of the inflatable membranes to inflate at a time, and the configuration of the other uninflated inflatable membranes located at the outer layers of the inflated inflatable membranes changes following the inflated inflatable membranes.
Optionally, each layer of the inflatable membrane is arranged to be inflated with different volumes of gas under the conditions of different vehicle speeds and different noise in the vehicle, so that the height of the unfolded modeling in the vertical direction is different.
Optionally, the tensile strength of different parts of each layer of the inflatable membrane is different, so that the inflatable membrane is streamline in the unfolding state;
optionally, the plurality of layers of inflatable membranes are configured such that in an uninflated state, the inflatable membranes of different layers have different tensile strengths at locations in a vertical direction thereof to enable streamlining contouring in different directions when the inflatable membranes of different layers are in an expanded state.
In particular, the present invention provides a system for reducing the wind noise of an exterior rear view mirror comprising:
an exterior rear view mirror as described above;
the wind noise detection unit is used for detecting a noise signal inside the vehicle in the running process of the vehicle;
the vehicle speed sensor is used for detecting a vehicle speed signal of the vehicle in the running process;
a controller for adjusting a shape of the multilayer film structure of the exterior mirror according to the noise signal and the vehicle speed signal to guide the air flow flowing through the exterior mirror to flow below a window of the vehicle.
Optionally, the system further comprises:
the inflation mechanism is used for inflating gas into the multilayer film structure so as to change the shape of the multilayer film structure;
the plurality of inflation tubes correspond to the plurality of layers of inflation films of the outer rearview mirror respectively, and two ends of each inflation tube are connected with the inflation mechanism and one layer of inflation film respectively;
and the valves are respectively arranged on the inflation pipes, are connected with the controller and are used for opening or closing the corresponding inflation pipes under the control of the controller.
Optionally, the controller is configured to control a target valve of the multiple valves to be opened and other valves to be closed under a preset vehicle speed and a preset noise value, so as to open a target inflation tube corresponding to the target valve and further inflate a target inflation film corresponding to the target inflation tube.
Optionally, the controller is configured to control the target valve to close after being opened for a preset time at the preset vehicle speed and the preset noise value, so as to fill a preset volume of gas into the target inflation film.
According to the scheme of the invention, the outer surface of the rearview mirror base is coated with the multilayer film structure, when the vehicle speed is lower than a preset speed, the multilayer film structure is tightly attached to the outer surface of the rearview mirror base, so that the original structure of the rearview mirror base of the vehicle is not changed visually, the attractiveness of the rearview mirror base is still kept, and when the vehicle speed is higher than the preset speed, the multilayer film structure can be shaped according to the conditions of the vehicle speed and the noise in the vehicle, so that the wind noise is reduced. Therefore, the rearview mirror base can meet the requirements of attractiveness and wind noise reduction, the attractiveness of the rearview mirror is not affected at low speed, and the wind noise reduction requirement is met at high speed. In addition, when the vehicle speed is higher than the preset speed, the shape of the multilayer film structure can be adjusted according to the vehicle speed and the noise condition in the vehicle, so that the requirements of wind noise optimization at different vehicle speeds can be met, and the technical problem that the wind noise optimization can only be performed at a certain vehicle speed in the prior art is solved.
In addition, when the speed of a vehicle is low, the noise of the wind in the vehicle is low, the blower cannot inflate the multilayer film structure on the surface of the rearview mirror, and the outer surface of the rearview mirror base is of a flat structure, so that the requirement of attractiveness is met. When the speed of a vehicle is higher, the noise in the vehicle is higher, the blower can receive the signal of blast air, and then according to the demand that reduces wind and make an uproar, aerify in the inflation film of different layers, make the surface of rear-view mirror base present the streamlined of equidirectional, equidimension not, and then guide the air current to flow in the door window below, reach the requirement that reduces wind and make an uproar. Compared with the prior art, the scheme can not cause the integral shape of the rearview mirror to be poor at low speed, and the appearance is not influenced. Through coating the multilayer film structure on the outer rearview mirror base, when the vehicle speed is high, air is inflated into the multilayer film structure according to the noise in the vehicle and the vehicle speed, and then the air flow flowing through the rearview mirror is guided to flow towards the lower part of the vehicle window, so that the air flow is prevented from directly impacting the vehicle window, and the effect of reducing wind noise is achieved.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
fig. 1 shows a schematic perspective view of an exterior rear view mirror for a vehicle according to one embodiment of the present invention;
FIG. 2 shows a partial schematic block diagram of an exterior rear view mirror for a vehicle with the mirror housing removed in accordance with one embodiment of the present invention;
FIG. 3 shows a schematic cross-sectional view taken along section line A-A shown in FIG. 2;
FIG. 4 shows a schematic block diagram of a system for reducing outside mirror wind noise according to one embodiment of the present invention;
FIG. 5 shows a schematic block diagram of a system for reducing outside mirror wind noise according to one embodiment of the present invention;
in the figure: 10-external rear view mirror, 1-rear view mirror shell, 2-rear view mirror base, 21-multilayer film structure, 211-inflatable film, 22-base body, 20-wind noise detection unit, 30-vehicle speed sensor, 40-controller, 50-inflation mechanism, 60-inflation tube and 70-valve.
Detailed Description
Fig. 1 shows a schematic perspective view of an exterior rear view mirror for a vehicle according to one embodiment of the present invention. As shown in fig. 1, the exterior mirror 10 includes a mirror housing 1 and a mirror base 2, and the mirror base 2 is used to connect the mirror housing 1 to a vehicle body of a vehicle. The outer surface of the mirror base 2 is covered with a multi-layer film structure 21 which can change the shape. The multilayer film structure 21 is configured to be closely attached to the outer surface of the mirror base 2 when the vehicle speed is lower than a preset speed, and to be shaped according to the vehicle speed and the noise in the vehicle when the vehicle speed is higher than or equal to the preset speed, thereby guiding the air flow passing through the exterior mirror to flow below the window of the vehicle.
According to the scheme of the invention, the outer surface of the rearview mirror base 2 is coated with the multilayer film structure 21, when the vehicle speed is lower than a preset speed, the multilayer film structure 21 is tightly attached to the outer surface of the rearview mirror base 2, so that the original structure of the rearview mirror base 2 of the vehicle is not changed visually, the attractiveness of the rearview mirror base 2 is still kept, and when the vehicle speed is higher than the preset speed, the multilayer film structure 21 can change the shape according to the vehicle speed and the condition of noise in the vehicle, so that the wind noise is reduced. Therefore, the rearview mirror base 2 can meet the requirements of attractiveness and wind noise reduction, and the requirements of not influencing the attractiveness of the rearview mirror at low speed and reducing the wind noise at high speed are met. In addition, when the vehicle speed is higher than the preset speed, the shape of the multilayer film structure 21 can be adjusted according to the vehicle speed and the noise condition in the vehicle, so that the requirement of wind noise optimization at different vehicle speeds can be met, and the technical problem that the wind noise optimization can only be performed at a certain vehicle speed in the prior art is solved.
In one embodiment, the multilayer film structure 21 is configured to be capable of generating streamline shapes in different directions under different vehicle speeds and different in-vehicle noises when the vehicle speed is higher than or equal to a preset speed. The preset speed may be, for example, 60km/h, 70km/h, 80km/h, 90km/h or 100km/h, or any other value within 60-100 km/h. The specific value of the preset speed can be determined according to the vehicle type, and is generally 60 km/h.
In this embodiment, when the vehicle speed is higher than or equal to the preset speed, the multilayer film structure 21 may have a streamline shape in different directions under different vehicle speeds and different vehicle interior noises, and thus, the shape of the mirror base 2 may be changed. At this time, the rearview mirror base 2 can be regarded as including the base body 22 and the multilayer film structure 21 covering the outer surface of the base body 22, when the shape of the multilayer film structure 21 is changed, the shape of the rearview mirror base 2 is changed naturally, so that the outer surface of the rearview mirror base 2 presents streamline shapes in different directions at different vehicle speeds and in-vehicle noises. Therefore, the requirement of wind noise optimization under different vehicle speeds can be met.
Fig. 2 shows a partially schematic structural view of an exterior mirror for a vehicle with a mirror case removed, according to one embodiment of the present invention, in which a structure of a multilayer film structure 21 in a developed state is shown. FIG. 3 shows a schematic cross-sectional view taken along section line A-A of FIG. 2, wherein a three-layer inflatable membrane is taken as an example. As shown in fig. 2 and 3, the multilayer film structure 21 is coated on at least a part of the outer surface of the base body 22. The periphery of the multilayer film structure 21 and the base body 22 may be connected and sealed by adhesion. The multilayer film structure 21 is composed of a plurality of inflatable films 211 stacked in this order from the inside to the outside. Each inflatable membrane 211 is configured to be capable of being deployed into a streamlined shape in an inflated state.
The multilayer film structure is self-operating, with different portions of each inflatable film 211 having different tensile strengths, so that the inflatable film 211 appears streamlined in the expanded state. Also, the multilayer inflatable membranes 211 are configured such that, in an uninflated state, the tensile strength of the inflatable membranes 211 of different layers is different at each portion in the vertical direction thereof, so as to enable a streamlined shape in different directions to occur when the inflatable membranes 211 of different layers are in an expanded state. The streamline form of each layer of inflated film 211 after being inflated is obtained through wind tunnel test verification, and the aim of reducing wind noise can be achieved within any vehicle speed within the range of 60-120km/h, namely, the multilayer film structure can be inflated according to the vehicle speed and the noise in the vehicle, so that different streamline forms are constructed, and the streamline forms corresponding to different vehicle speeds and/or different noise values are calibrated in advance through the wind tunnel test. The streamline shape is in the front-back direction of the rearview mirror base, the front is low, the rear is high, the upper part is low, the lower part is high, and the specific reference is made to fig. 2 and fig. 3.
The multiple inflatable membranes 211 are arranged to allow only one of the inflatable membranes 211 to inflate at a time, and the configuration of the other uninflated inflatable membranes 211 located at the outer layers of the inflated inflatable membranes 211 changes following the inflated inflatable membranes 211. That is, only one layer of the inflatable membrane 211 is inflated at a certain vehicle speed and a certain noise value, the other inflatable membranes 211 are not inflated, and only the other layer of the inflatable membrane 211 is inflated at another vehicle speed and another noise value, so that the purpose of reducing noise at different vehicle speeds and noise values can be achieved due to the different streamline modeling directions of each layer of the inflatable membrane 211 in the plurality of layers of the inflatable membranes 211.
Moreover, each layer of the inflatable membrane 211 can be inflated to different degrees according to different vehicle speeds and different noise values, namely, each layer of the inflatable membrane 211 can be inflated with different volumes of gas under the conditions of different vehicle speeds and different noise in the vehicle, so that the unfolded modeling has different heights in the vertical direction. It will be appreciated that only one layer of inflatable membrane 211 is inflated at a range of vehicle speeds, with the layer of inflatable membrane 211 being inflated to different degrees at a particular vehicle speed and noise level. For example, if a certain layer of the inflatable membrane 211 is inflated when the vehicle speed is at any one of 60 to 70km/h, the layer of the inflatable membrane 211 is inflated when the current vehicle speed is 65km/h and the wind noise value is 70dB, the layer of the inflatable membrane 211 is inflated, the height of the inflatable membrane 211 in the vertical direction thereof is 2mm due to the gas filled into the inflatable membrane 211, and the height of the inflatable membrane 211 in the vertical direction thereof is 3mm due to the gas filled into the inflatable membrane 211 when the current vehicle speed is 70km/h and the wind noise value is 75 dB.
FIG. 4 shows a schematic block diagram of a system for reducing outside mirror wind noise according to one embodiment of the present invention. As shown in fig. 4, the system includes the aforementioned exterior mirror 10, a wind noise detection unit 20, a vehicle speed sensor 30, and a controller 40. The wind noise detection unit 20 is used to detect a noise signal inside the vehicle during running of the vehicle. The vehicle speed sensor 30 is used to detect a vehicle speed signal during running of the vehicle. The controller 40 is configured to adjust the configuration of the multilayer film structure 21 of the exterior mirror 10 in accordance with the noise signal and the vehicle speed signal to direct the air flow passing through the exterior mirror to flow below the window of the vehicle. The wind noise detection means 20 may be a microphone, for example, and may be mounted on the vehicle body near the ear of the driver, for example, in the front door B pillar trim. The vehicle speed sensor 30 may be a vehicle speed sensor 30 that is originally configured for the vehicle. The controller 40 may be, for example, an on-board BCM controller 40.
FIG. 5 shows a schematic block diagram of a system for reducing outside mirror wind noise according to one embodiment of the present invention. The system also includes an inflation mechanism 50, a plurality of inflation tubes 60, and a plurality of valves 70. The inflation mechanism 50 is used to inflate the multilayer film structure 21 with gas to change the shape of the multilayer film structure 21. The plurality of inflation tubes 60 respectively correspond to the plurality of inflation films 211 of the exterior mirror 10, and both ends of each inflation tube 60 are respectively connected to the inflation mechanism 50 and one of the inflation films 211. The plurality of valves 70 are respectively disposed on the plurality of inflation tubes 60, and each of the valves 70 is connected to the controller 40 for opening or closing the corresponding inflation tube 60 under the control of the controller 40. The inflation mechanism 50 may be, for example, a blower or other mechanism capable of inflating the inflatable membrane 211. The valve 70 may be, for example, a solenoid valve 70.
The controller 40 is configured to control the target valve 70 of the plurality of valves 70 to open and the other valves 70 to close at a preset vehicle speed and a preset noise value, so as to open the target inflation tube 60 corresponding to the target valve 70 and inflate the target inflation film 211 corresponding to the target inflation tube 60. The controller 40 is configured to control the target valve 70 to close after being opened for a preset time at a preset vehicle speed and a preset noise value to fill the target inflatable membrane 211 with a preset volume of gas. Here, the controller 40 may control the opening degree of the target valve 70 and/or the opening time of the target valve 70 to control the volume of the gas charged into the target gas charging film 211.
The system operates on the principle that when the vehicle speed sensor 30 detects that the vehicle speed is below a predetermined speed, the controller 40 controls the valves 70 to be in the closed state, and at this time, all of the inflatable membranes 211 are not inflated, and the multiple inflatable membranes 211 are tightly attached to the outer surface of the base body 22, so that the rearview mirror base 2 is visually substantially the same as the structure before being covered with the multiple-layer membrane structure 21. When the vehicle speed sensor 30 detects that the vehicle speed is higher than or equal to the preset speed, the controller 40 controls one valve 70 of the plurality of valves 70 to be opened, and as to which valve 70 is to be opened, it is determined according to a specific speed value, for example, when the vehicle speed is a first speed value, the first valve 70 is opened. As for the opening degree and/or time of the first valve 70 opening, it is possible to determine according to the specific speed value and the wind noise value, and finally make a certain inflatable membrane 211 be spread into a streamline shape, and make the height of the certain inflatable membrane in the vertical direction reach a preset height, so as to guide the air flow flowing through the outside rear view mirror to flow below the window of the vehicle.
That is to say, the control method for inflating different inflatable membranes 211 is controlled by the valve 70 at the front end of the blower, different air noise values correspond to different valve opening switches, and then the inflatable membranes 211 at different layers are inflated by the inflation tube 60, so that different streamline shapes are formed on the outer surface of the rearview mirror base 2, and the effect of reducing the air noise is achieved.
According to the scheme of the invention, when the vehicle speed is low, the noise of the wind in the vehicle is low, the blower cannot inflate the multilayer film structure 21 on the surface of the rearview mirror, and the outer surface of the rearview mirror base 2 is of a flat structure, so that the requirement of attractiveness is met. When the speed of a motor vehicle is higher, noise in the vehicle is larger, the blower can receive the signal of blast air, and then according to the demand that reduces wind and make an uproar, aerify in the membrane 211 aerifys to different layers, make the surface of rear-view mirror base 2 present the streamlined of equidirectional, equidimension not, and then guide the air current to flow in the door window below, reach the requirement that reduces wind and make an uproar. Compared with the prior art, the scheme can not cause the integral shape of the rearview mirror to be poor at low speed, and the appearance is not influenced. By coating the multilayer film structure 21 on the outer rearview mirror base 2, when the vehicle speed is high, the multilayer film structure 21 is inflated according to the noise in the vehicle and the vehicle speed, so that the air flow flowing through the rearview mirror is guided to flow towards the lower part of the vehicle window, the direct impact of the air flow on the vehicle window is avoided, and the effect of reducing the wind noise is achieved.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
1. An exterior rear view mirror for a vehicle, comprising a mirror housing and a mirror base for connecting the mirror housing to a body of the vehicle, the mirror base being coated on its outer surface with a multi-layer film structure which is capable of changing its shape;
the multilayer film structure is configured to be tightly attached to the outer surface of the rearview mirror base when the vehicle speed is lower than a preset speed, and the shape of the multilayer film structure is adjusted according to the conditions of the vehicle speed and the noise in the vehicle when the vehicle speed is higher than or equal to the preset speed so as to guide the airflow flowing through the external rearview mirror to flow below the window of the vehicle;
the multilayer film structure consists of a plurality of layers of inflatable films which are sequentially stacked from inside to outside;
the multiple inflatable membranes are arranged to allow only one of the inflatable membranes to be inflated at a time, and the shapes of other uninflated inflatable membranes positioned at the outer layers of the inflated inflatable membranes are changed along with the inflated inflatable membranes;
the multilayer inflatable membranes are configured in such a way that in an uninflated state, the tensile strength of each part of the inflatable membranes in different layers in the vertical direction of the inflatable membranes is different, so that streamline shapes in different directions can appear when the inflatable membranes in different layers are in an expanded state;
only one layer of inflatable membrane is inflated under a certain vehicle speed and a certain noise value, other inflatable membranes are not inflated, and only the other layer of inflatable membrane is inflated under another vehicle speed and another noise value.
2. The exterior mirror according to claim 1, characterized in that the multilayer film structure has a streamlined shape in different directions at different vehicle speeds and different in-vehicle noises when the vehicle speed is higher than or equal to the preset speed.
3. The exterior rearview mirror of claim 2, wherein the multilayer inflatable film is configured to unfold into a streamlined shape in an inflated state.
4. The exterior rearview mirror of claim 3, wherein each of the inflatable membranes is configured to unfold into a streamlined shape in an inflated state.
5. An exterior mirror according to claim 4, wherein each of the air-filled membranes is arranged to be filled with a different volume of air at different vehicle speeds and different in-vehicle noise to make the developed figure thereof different in height in the vertical direction thereof.
6. An exterior mirror according to any one of claims 3-5, wherein the tensile strength is different at different locations of each of the layers of the inflatable membrane, such that the inflatable membrane assumes a streamlined shape in the extended state.
7. A system for reducing exterior mirror wind noise, comprising:
an exterior rear view mirror according to any one of claims 1 to 6;
the wind noise detection unit is used for detecting a noise signal inside the vehicle in the running process of the vehicle;
the vehicle speed sensor is used for detecting a vehicle speed signal of the vehicle in the running process;
a controller for adjusting a shape of the multilayer film structure of the exterior mirror according to the noise signal and the vehicle speed signal to guide the air flow flowing through the exterior mirror to flow below a window of the vehicle.
8. The system of claim 7, further comprising:
the inflation mechanism is used for inflating gas into the multilayer film structure so as to change the shape of the multilayer film structure;
the plurality of inflation tubes correspond to the plurality of layers of inflation films of the outer rearview mirror respectively, and two ends of each inflation tube are connected with the inflation mechanism and one layer of inflation film respectively;
and the valves are respectively arranged on the inflation pipes, are connected with the controller and are used for opening or closing the corresponding inflation pipes under the control of the controller.
9. The system of claim 8, wherein the controller is configured to control a target valve of the plurality of valves to open and other valves to close at a preset vehicle speed and a preset noise value, thereby opening a target inflation tube corresponding to the target valve and further inflating a target inflation film corresponding to the target inflation tube.
10. The system of claim 9, wherein the controller is configured to control the target valve to close after opening for a preset time at the preset vehicle speed and the preset noise value to fill a preset volume of gas into the target inflation membrane.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010615506.9A CN111688581B (en) | 2020-06-30 | 2020-06-30 | Exterior rearview mirror for vehicle and system for reducing wind noise of exterior rearview mirror |
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| CN202010615506.9A CN111688581B (en) | 2020-06-30 | 2020-06-30 | Exterior rearview mirror for vehicle and system for reducing wind noise of exterior rearview mirror |
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| CN111688581B true CN111688581B (en) | 2021-07-13 |
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| CN106043469A (en) * | 2015-04-09 | 2016-10-26 | 通用汽车环球科技运作有限责任公司 | Adaptable aerodynamic spoiler for motor vehicle |
| CN108327634A (en) * | 2017-01-20 | 2018-07-27 | 福特全球技术公司 | Mirror assembly and wind noise fluctuate reduction method |
| CN206781635U (en) * | 2017-04-21 | 2017-12-22 | 米高（上海）汽车配件有限公司 | The rearview mirror that a kind of reduction windage and wind are made an uproar |
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