CN107650826B - Underbody guard board integrated with controllable switch structure and control method - Google Patents
Underbody guard board integrated with controllable switch structure and control method Download PDFInfo
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- CN107650826B CN107650826B CN201710822536.5A CN201710822536A CN107650826B CN 107650826 B CN107650826 B CN 107650826B CN 201710822536 A CN201710822536 A CN 201710822536A CN 107650826 B CN107650826 B CN 107650826B
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- vehicle
- opening degree
- sealing plate
- engine compartment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
- B60R13/0861—Insulating elements, e.g. for sound insulation for covering undersurfaces of vehicles, e.g. wheel houses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K11/00—Arrangement in connection with cooling of propulsion units
- B60K11/08—Air inlets for cooling; Shutters or blinds therefor
- B60K11/085—Air inlets for cooling; Shutters or blinds therefor with adjustable shutters or blinds
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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
- Y02T10/88—Optimized components or subsystems, e.g. lighting, actively controlled glasses
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Air-Conditioning For Vehicles (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
The invention relates to the field of engine compartment heat management, in particular to a vehicle bottom guard plate and a control method. The vehicle bottom guard plate is provided with a plurality of ventilation openings in the area corresponding to an engine compartment, and the ventilation openings are provided with sealing plates which are controlled to be opened and closed by a controller. A temperature threshold value and a secondary temperature threshold value are set, and a controller controls the opening degree of a sealing plate according to the temperature of an engine compartment in a flameout state and a driving state. The ventilation opening can be opened to help the engine compartment to dissipate heat under certain special working conditions, such as a short time after the vehicle is flamed out, so that the parts are prevented from aging, and the service life of parts in the engine compartment is prolonged; the ventilation opening can be controlled according to actual conditions during driving, a heat dissipation channel is provided, the requirement of parts in an engine compartment on heat resistance can be reduced, the cost of the whole vehicle is reduced, the noise value can be improved, and the comfort of a user is improved.
Description
Technical Field
The invention relates to the field of engine compartment heat management, in particular to a vehicle bottom guard plate and a control method.
Background
The vehicle bottom guard plate applied to the current whole vehicle has fixed part states. The underbody guard plate can not change the working area as required according to the working condition of the whole vehicle, adjust the airflow channel and effectively expand the application range and functions of the underbody guard plate.
The underbody guard plate is an effective measure for reducing the wind resistance of the whole vehicle, isolating road noise, preventing road stone impact and reducing the liquid sputtering corrosion of the road surface on chassis parts. The better the sealing performance of the bottom guard plate is, the better the effect of realizing the functions is. However, the design of the excessively closed underbody guard plate is not beneficial to the heat dissipation of an engine compartment, and in order to adapt to higher front compartment temperature, the temperature resistance level of front compartment parts is inevitably improved; in addition, under certain special conditions, for example: in a short time after the vehicle is flamed out, the temperature rise of the front cabin cannot be discharged through airflow, so that the aging of parts is accelerated, and the spontaneous combustion of parts in the engine cabin is caused under extreme conditions; the other vehicle type is limited by the space of the whole front cabin, and some areas of the front cabin can not be effectively radiated by the cooling fan.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the vehicle bottom guard plate integrated with the controllable switch structure and the control method, and the vent can be opened to help the engine compartment to dissipate heat in some special working conditions, such as a short time after the vehicle is flamed out, so that the parts are prevented from aging, and the service life of the parts in the engine compartment is prolonged; the ventilation opening can be controlled according to actual conditions during driving, a heat dissipation channel is provided, the requirement of parts in the engine compartment on heat resistance can be reduced, and the cost of the whole vehicle is reduced.
The invention is realized by the following steps: the vehicle bottom guard plate is provided with a plurality of ventilation openings in the area corresponding to an engine compartment, and the ventilation openings are provided with sealing plates which are controlled to be opened and closed by a controller.
A control method of a vehicle bottom guard plate integrated with a controllable switch structure is characterized in that a temperature threshold T1 and a secondary temperature threshold T2 are set, the opening degree of a vent hole completely closed by a sealing plate is 0, the opening degree of the sealing plate when the sealing plate is opened to the maximum position is 100%, and a controller selectively controls the opening degree of the sealing plate according to the following conditions; t is the actual temperature of the engine compartment;
1) when the vehicle is in a key-off state,
if T is more than or equal to T1, the controller controls the sealing plate to be opened to the maximum opening degree, namely the opening degree is 100%;
if T is less than T1, the controller controls the sealing plate to close, namely, the opening degree is 0;
2) when the vehicle is in a driving state,
if T is more than or equal to T1, the controller controls the sealing plate to be opened to the maximum opening degree, namely the opening degree is 100%;
if T is less than or equal to T2, the controller controls the sealing plate to close, namely the opening degree is 0;
if T2 < T1, the controller controls the opening of the sealing plate 4 according to f (T), and f (T) is obtained by experiment.
And when the whole vehicle is completely powered off, the whole vehicle is regarded as a flameout state, and the rest vehicles are regarded as driving states.
The method further comprises the step of setting a vehicle speed threshold value V1, and when the current vehicle speed V is larger than or equal to the vehicle speed threshold value V1, the control of a sealing plate is not started, and the sealing plate is kept in a full-closed state with the initial opening degree of 0.
The vehicle speed threshold value is determined by a CFD simulation or real vehicle test method according to a flow field and a temperature field in an engine room under the condition that an engine room fan is not started when the whole vehicle runs, so that the vehicle speed threshold value V1 is determined.
The vehicle is in a flameout state, when T is larger than or equal to T1, the controller controls the sealing plate to be opened to 100% of opening degree and keeps the sealing plate closed after the opening time S.
The opening time S is 30 seconds.
The specific test method of f (T) is that the sealing plate is fully opened and fully closed under the same test working condition to obtain the engine compartment temperature under the limit condition, then the opening degree of the sealing plate is divided into a plurality of parts, the engine compartment temperature under each opening degree is tested respectively, and finally the function f (T) corresponding to the engine compartment temperature T and the opening degree of the sealing plate is obtained through fitting.
The vehicle bottom guard plate integrated with the controllable switch structure and the control method can open the ventilation opening to help the engine compartment radiate heat in some special working conditions, such as a short time after the vehicle is flamed out, prevent parts from aging, and prolong the service life of parts in the engine compartment; the ventilation opening can be controlled according to the actual situation during the driving process, a heat dissipation channel is provided, the requirement of parts in the engine compartment on heat resistance can be reduced, and the cost of the whole vehicle is reduced; in addition, when the cooling fan is matched with the cooling fan to work together for cooling, the working time of the cooling fan can be reduced, the noise value is improved, and the comfort of a user is improved.
Drawings
FIG. 1 is a schematic structural view of a underbody guard plate of an integrated controllable switch structure of the invention;
FIG. 2 is a logic block diagram of a control method of the underbody guard plate of the integrated controllable switch structure of the invention.
In the figure: 1 vehicle bottom guard plate, 2 ventilation openings, 3 controllers and 4 sealing plates.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications can be made by one skilled in the art after reading the description of the present invention, and equivalents fall within the scope of the invention defined by the appended claims.
Example 1
As shown in fig. 1, the underbody guard board integrated with the controllable switch structure is characterized in that a plurality of ventilation openings 2 are formed in the corresponding area of an engine compartment of the underbody guard board 1, and sealing plates 4 controlled to be opened and closed by a controller 3 are mounted on the ventilation openings 2.
As shown in fig. 2, a control method of a vehicle underbody guard plate integrated with a controllable switch structure is set, a temperature threshold value T1 and a secondary temperature threshold value T2 are set, the opening degree of a sealing plate 4 for completely closing a vent 2 is 0, the opening degree of the sealing plate 4 for opening to the maximum position is 100%, and a controller 3 selectively controls the opening degree of the sealing plate 4 according to the following conditions; t is the actual temperature of the engine compartment;
1) when the vehicle is in a key-off state,
if T is more than or equal to T1, the controller 3 controls the sealing plate 4 to be opened to the maximum opening degree, namely the opening degree is 100%;
if T is less than T1, the controller 3 controls the sealing plate 4 to close, namely, the opening degree is 0;
2) when the vehicle is in a driving state,
if T is more than or equal to T1, the controller 3 controls the sealing plate 4 to be opened to the maximum opening degree, namely the opening degree is 100%;
if T is less than or equal to T2, the controller 3 controls the sealing plate 4 to close, namely, the opening degree is 0;
if T2 < T1, the controller 3 controls the opening of the sealing plate 4 according to f (T), and f (T) is obtained by experiment.
Considering urban traffic jam and the requirements of actual control demand on vehicle safety and dynamic performance under the condition of low speed and high speed, the whole vehicle is considered to be in a flameout state when being completely powered off, and the rest are considered to be in a driving state; in the embodiment, the method further comprises the step of setting a vehicle speed threshold value V1, when the current vehicle speed V is larger than or equal to the vehicle speed threshold value V1, the control on the sealing plate 4 is not started, and the sealing plate 4 is kept in a fully closed state with the initial opening degree of 0; the vehicle speed threshold value is determined by a CFD simulation or real vehicle test method according to a flow field and a temperature field in an engine room under the condition that an engine room fan is not started when the whole vehicle runs, so that the vehicle speed threshold value V1 is determined.
The method further comprises the step of setting the opening time S, and when the vehicle is in a flameout state and T is larger than or equal to T1, the controller 3 controls the sealing plate 4 to be opened to 100% and keeps the opening for the time S, and then the sealing plate 4 is closed.
In the present embodiment, the opening time S is preferably set to 30 seconds.
The invention can be further described as that the specific test method of f (T) is that the sealing plate 4 is fully opened and fully closed under the same test working condition to obtain the engine compartment temperature under the limit condition, then the opening degree of the sealing plate 4 is divided into a plurality of parts, the engine compartment temperature under each opening degree is tested respectively, and finally the function f (T) corresponding to the engine compartment temperature T and the opening degree of the sealing plate 4 is obtained by fitting.
Claims (4)
1. A control method of a vehicle bottom guard plate integrated with a controllable switch structure is characterized by comprising the following steps: the vehicle bottom guard plate (1) is provided with a plurality of ventilation openings (2) in the area corresponding to the engine compartment, and the ventilation openings (2) are provided with sealing plates (4) controlled to be opened and closed by a controller (3); the control method comprises the following steps: setting a vehicle speed threshold V1, a primary temperature threshold T1 and a secondary temperature threshold T2, setting the opening degree of the sealing plate (4) for completely closing the ventilation opening (2) as 0, and setting the opening degree of the sealing plate (4) at the maximum position as 100%, and selecting and controlling the opening degree of the sealing plate (4) by the controller (3) according to the following conditions; t is the actual temperature of the engine compartment;
1) when the vehicle is in a key-off state,
if T is larger than or equal to T1, the controller (3) controls the sealing plate (4) to be opened to the maximum opening degree, namely the opening degree is 100%;
if T is less than T1, the controller (3) controls the sealing plate (4) to close, namely, the opening degree is 0;
2) when the vehicle is in a driving state and the current vehicle speed V of the vehicle is greater than or equal to a vehicle speed threshold value V1, the control of the sealing plate (4) is not started, and the sealing plate (4) is kept in a full-closed state with an initial opening degree of 0; when the vehicle current vehicle speed V is less than the vehicle speed threshold V1,
if T is larger than or equal to T1, the controller (3) controls the sealing plate (4) to be opened to the maximum opening degree, namely the opening degree is 100%;
if T is less than or equal to T2, the controller (3) controls the sealing plate (4) to close, namely the opening is 0;
if T2 < T1, the controller (3) controls the opening degree of the sealing plate (4) according to f (T), and f (T) is obtained according to experiments;
the control method further comprises the following steps: setting opening time S, and when the vehicle is in a flameout state and T is larger than or equal to T1, the controller (3) controls the sealing plate (4) to be opened to 100% of opening degree and keeps the opening degree for S time, and then the sealing plate (4) is closed; the specific test method of f (T) is that the sealing plate (4) is fully opened and fully closed under the same test working condition to obtain the engine compartment temperature under the limit condition, then the opening degree of the sealing plate (4) is divided into a plurality of parts, the engine compartment temperature under each opening degree is tested respectively, and finally the function f (T) of the engine compartment temperature T corresponding to the opening degree of the sealing plate (4) is obtained through fitting.
2. The control method of the underbody guard plate with the integrated controllable switch structure as claimed in claim 1, characterized in that: when the whole vehicle is completely powered off, the vehicle is in a flameout state, and the rest of the vehicle is in a driving state.
3. The control method of the underbody guard plate with the integrated controllable switch structure as claimed in claim 1, characterized in that: the vehicle speed threshold value is determined by a CFD simulation or real vehicle test method according to a flow field and a temperature field in an engine room under the condition that an engine room fan is not started when the whole vehicle runs, so that the vehicle speed threshold value V1 is determined.
4. The control method of the underbody guard plate with the integrated controllable switch structure as claimed in claim 1, characterized in that: the opening time S is 30 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710822536.5A CN107650826B (en) | 2017-09-13 | 2017-09-13 | Underbody guard board integrated with controllable switch structure and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710822536.5A CN107650826B (en) | 2017-09-13 | 2017-09-13 | Underbody guard board integrated with controllable switch structure and control method |
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| Publication Number | Publication Date |
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| CN107650826A CN107650826A (en) | 2018-02-02 |
| CN107650826B true CN107650826B (en) | 2020-10-30 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110091813A (en) * | 2019-05-29 | 2019-08-06 | 华人运通(江苏)技术有限公司 | Intelligent chassis backplate control system and method |
| CN113968127A (en) * | 2020-07-22 | 2022-01-25 | 郑州宇通客车股份有限公司 | Vehicle with rear engine and rear cabin door control method and device thereof |
| CN116198615A (en) * | 2023-03-29 | 2023-06-02 | 中国第一汽车股份有限公司 | Vehicle bottom guard board control method and device, electronic equipment and medium |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103121427B (en) * | 2011-11-18 | 2016-01-13 | 北汽福田汽车股份有限公司 | Adjustable automobile air grid system and automobile |
| JP6192594B2 (en) * | 2014-05-27 | 2017-09-06 | 愛三工業株式会社 | Grill shutter device |
| CN104234814A (en) * | 2014-08-29 | 2014-12-24 | 三一汽车起重机械有限公司 | Thermal management system for engine and engineering machine |
| DE102015002431A1 (en) * | 2015-02-26 | 2015-08-06 | Daimler Ag | Underbody covering for a motor vehicle, in particular passenger cars |
| US20160361991A1 (en) * | 2015-06-12 | 2016-12-15 | Ford Global Technologies, Llc | Underbody air and thermal management system for a motor vehicle |
| CN106515428B (en) * | 2016-10-27 | 2018-12-18 | 广州汽车集团股份有限公司 | Control method, device and the engine management system of air-inlet grille |
| CN106627105B (en) * | 2016-12-09 | 2019-04-16 | 浙江吉利控股集团有限公司 | A kind of ventilating system for vehicle |
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