CN111098835B - Control method and device for assisting vehicle braking - Google Patents
Control method and device for assisting vehicle braking Download PDFInfo
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- CN111098835B CN111098835B CN201811270012.0A CN201811270012A CN111098835B CN 111098835 B CN111098835 B CN 111098835B CN 201811270012 A CN201811270012 A CN 201811270012A CN 111098835 B CN111098835 B CN 111098835B
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- vehicle
- braking
- grille
- opening angle
- assisting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/12—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting otherwise than by retarding wheels, e.g. jet action
- B60T1/16—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting otherwise than by retarding wheels, e.g. jet action by increasing air resistance, e.g. flaps
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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)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Regulating Braking Force (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
The invention provides an exterior rearview mirror steering lamp control method which is applied to a vehicle, and when the vehicle speed is within a preset vehicle speed range, whether the opening angle of a grille blade of an active air inlet grille is an incomplete opening angle is judged; if yes, judging whether the vehicle is in a braking state or not; and if the vehicle is in a braking state, controlling the grille blades to be opened to the maximum opening angle. Therefore, when a driver brakes the vehicle in the high-speed running process of the vehicle, the grille blades of the active air inlet grille are actively opened to the maximum opening angle, air resistance is increased to shorten the braking distance of the vehicle, and running safety is improved.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a control method and a control device for assisting vehicle braking.
Background
Currently, active intake grilles (AGS) are incorporated into vehicles to help meet more stringent fuel economy standards. For example, during high speed driving of a vehicle, the AGS is automatically closed to block airflow through the engine cooling system to reduce vehicle drag and fuel consumption; when starting a cold engine, the AGS remains off to help quickly reach higher engine temperatures to reduce vehicle emissions and fuel consumption.
In the prior art, when a vehicle runs at a high speed, the grille blade of the AGS is fully closed or partially closed to reduce the vehicle resistance, thereby achieving the purpose of reducing the fuel consumption, however, when the driver brakes the vehicle after the grille blade of the AGS is fully closed or partially closed, the braking distance of the vehicle is increased due to the reduction of the vehicle resistance.
Disclosure of Invention
In view of the above, the present invention is directed to a method and an apparatus for controlling braking assistance of a vehicle, so as to solve the problem that when the vehicle is running at a high speed, the braking distance of the vehicle is increased due to the reduction of the vehicle resistance after the grille blades of the AGS are completely closed or partially closed.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
in one aspect, an embodiment of the present invention provides a control method for assisting braking of a vehicle, which is applied to the vehicle, and the method includes:
when the vehicle speed is within a preset vehicle speed range, judging whether the opening angle of a grille blade of the active air inlet grille is an incomplete opening angle or not;
if the opening angle is not the fully-opened angle, judging whether the vehicle is in a braking state;
and if the vehicle is in a braking state, controlling the grille blades to be opened to the maximum opening angle.
Further, if the vehicle is in a braking state, the step of controlling the grille blade to be opened to the maximum opening angle includes:
if the vehicle is in a braking state, the braking travel sensor judges the actual braking reaction distance of the vehicle;
and when the actual braking reaction distance is equal to the preset braking reaction distance, controlling the grille blade to be opened to the maximum opening angle.
Further, the method further comprises:
controlling the grille vanes to close when the vehicle is stopped.
Further, the incomplete opening angle is less than 90 °.
Further, the preset vehicle speed range is 80 km/h-120 km/h.
Compared with the prior art, the control method for assisting the vehicle brake has the following advantages:
according to the control method for assisting the braking of the vehicle, provided by the embodiment of the invention, when the vehicle speed is within the preset vehicle speed range, whether the opening angle of the grille blade of the active air inlet grille is an incomplete opening angle is judged; if yes, judging whether the vehicle is in a braking state or not; and if the vehicle is in a braking state, controlling the grille blades to be opened to the maximum opening angle. Therefore, when a driver brakes the vehicle in the high-speed running process of the vehicle, the grille blades of the active air inlet grille are actively opened to the maximum opening angle, air resistance is increased to shorten the braking distance of the vehicle, and running safety is improved.
In another aspect, an embodiment of the present invention provides a control device for assisting braking of a vehicle, where the control device is applied to the vehicle, and the device includes:
the opening angle judging module is used for judging whether the opening angle of the grille blade of the active air inlet grille is an incomplete opening angle or not when the vehicle speed is within a preset vehicle speed range;
the braking state judging module is used for judging whether the vehicle is in a braking state or not if the opening angle is an incomplete opening angle;
and the grille blade opening module is used for controlling the grille blade to be opened to the maximum opening angle if the vehicle is in a braking state.
Further, the grill blade opening module includes:
the reaction distance judgment submodule is used for judging the actual braking reaction distance of the vehicle by the braking stroke sensor;
and the grille blade opening submodule is used for controlling the grille blade to be opened to the maximum opening angle when the actual braking reaction distance is equal to the preset braking reaction distance.
Further, the apparatus further comprises:
a grille shutter closing module for controlling the grille shutter to close when the vehicle is stopped.
Further, the incomplete opening angle is less than 90 °.
Further, the preset vehicle speed range is 80 km/h-120 km/h.
Compared with the prior art, the auxiliary vehicle brake control device and the auxiliary vehicle brake control method have the same advantages, and are not repeated herein;
in yet another aspect, an embodiment of the present invention provides a vehicle having a control device for assisting braking of the vehicle.
Compared with the prior art, the vehicle and the control method for assisting the vehicle brake have the same advantages, and the detailed description is omitted.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a flowchart illustrating steps of a method for assisting vehicle braking according to a first embodiment of the present invention;
FIG. 2 is a flowchart illustrating steps of a control apparatus for assisting vehicle braking according to a second embodiment of the present invention;
fig. 3 is a block diagram of a control device for assisting vehicle braking according to a third embodiment of the present invention;
fig. 4 is a block diagram of a control device for assisting vehicle braking according to a fourth embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example one
Referring to fig. 1, a flowchart of steps of a control method for assisting vehicle braking according to an embodiment of the present invention is shown, and the specific steps are as follows:
step 101: and when the vehicle speed is within the preset vehicle speed range, judging whether the opening angle of the grille blade of the active air inlet grille is an incomplete opening angle.
In the embodiment of the invention, currently, when the vehicle is in the driving process, a driver can check the real-time driving speed of the vehicle through the speedometer. An Electronic Stability Control (ESC) of a vehicle controls driving force and braking force of front, rear, left and right wheels through an Electronic Control Unit (ECU) corresponding to a Central Processing Unit (CPU) of the vehicle by using important extensions of ABS (anti lock Brake System) and TCS (Traction Control System) functions when the vehicle is driven by turning, and by using a yaw rate sensor, a direction-finding acceleration sensor, and a steering wheel angle sensor when the vehicle is driven by turning, thereby ensuring lateral stability of the vehicle. For example, a wheel speed sensor may be installed on a wheel of the vehicle, and the ESC may calculate the vehicle speed according to the wheel speed acquired by the wheel speed sensor, and then upload the vehicle speed signal to a vehicle speed odometer or each system assembly that needs the vehicle speed signal.
In the embodiment of the invention, the preset vehicle speed range can be 80 km/h-120 km/h, namely the safety range of the vehicle running at high speed specified by the current traffic regulation in China, when the detected current vehicle speed is within the preset vehicle speed range, namely within 80 km/h-120 km/h, generally when the vehicle speed is more than 80km/h, whether the opening angle of the grille blades of the active air intake grille is an incomplete opening angle or not is judged, if the grille blades are completely opened, the opening angle is 90 degrees (the maximum opening angle), and if the grille blades are not completely opened, the opening angle is less than 90 degrees, and the embodiment of the invention can judge that the grille blades of the active air intake grille are in an incomplete opening state. The ECU of the vehicle may brake the position of the grille blade of the AGS according to the traveling speed of the vehicle by determining the state of the grille blade, that is, determining the position of the grille blade. Of course, the range of the preset vehicle speed is not limited in this embodiment, and may be flexibly set according to actual requirements.
Step 102: and if the opening angle is not the fully-opened angle, judging whether the vehicle is in a braking state.
Generally, during high-speed driving of a vehicle, the grille blades of the AGS are fully closed or partially closed to reduce vehicle resistance, thereby achieving the purpose of reducing fuel consumption, however, when the grille blades of the AGS are fully closed or partially closed, when a driver brakes the vehicle, the braking distance of the vehicle is increased due to the reduction of vehicle resistance. The braking Distance (mm) is one of key parameters for measuring the braking performance of a vehicle, and means that when people brake the vehicle at a certain speed, the Distance the vehicle travels from the beginning of braking to the time when the vehicle is completely stationary, namely the Distance the vehicle travels from the beginning of suddenly stepping on a brake pedal by a driver to the time when the vehicle is completely stopped at a certain initial speed; the device comprises a reaction distance part and a braking distance part; the smaller the braking distance is, the better the braking performance of the automobile is; therefore, the accurate control of the braking distance of the automobile plays an important role in guaranteeing the driving safety.
Therefore, in the embodiment of the present invention, when the opening angle of the grille blade of the active grille is smaller than 90 °, it is determined whether the vehicle is in a braking state, and a brake stroke sensor may be provided on a brake pedal of the vehicle, and when the vehicle is braked, the brake stroke sensor sends its braking signal to the ECU, which plays an important role in ensuring driving safety.
Step 103: and if the vehicle is in a braking state, controlling the grille blades to be opened to the maximum opening angle.
In the embodiment of the invention, if the vehicle is in a braking state, the grille blades are controlled to be automatically opened to the maximum opening angle of 90 degrees, specifically, after the ECU of the vehicle receives a braking signal, the grille blades are actively controlled to be automatically opened to the maximum opening angle of 90 degrees, and after the grille blades are opened to the maximum opening angle of 90 degrees, the air resistance is increased, so that the braking distance of the vehicle is reduced, and the driving safety of a driver is ensured.
In summary, the control method for assisting the braking of the vehicle provided by the embodiment of the invention has the following advantages:
according to the control method for assisting the braking of the vehicle, provided by the embodiment of the invention, when the vehicle speed is within the preset vehicle speed range, whether the opening angle of the grille blade of the active air inlet grille is an incomplete opening angle is judged; if yes, judging whether the vehicle is in a braking state or not; and if the vehicle is in a braking state, controlling the grille blades to be opened to the maximum opening angle. Therefore, when a driver brakes the vehicle in the high-speed running process of the vehicle, the grille blades of the active air inlet grille are actively opened to the maximum opening angle, air resistance is increased to shorten the braking distance of the vehicle, and running safety is improved.
Example two
Referring to fig. 2, a flowchart illustrating steps of a control method for assisting vehicle braking according to a second embodiment of the present invention is shown, and the specific steps are as follows:
step 201: and when the vehicle speed is within the preset vehicle speed range, judging whether the opening angle of the grille blade of the active air inlet grille is an incomplete opening angle.
This step is described in detail above in step 101 and is not meant to be cumbersome.
Step 202: and if the opening angle is not the fully-opened angle, judging whether the vehicle is in a braking state.
This step is described in detail above with respect to step 102 and is not meant to be burdensome.
Step 203: and if the vehicle is in a braking state, the braking stroke sensor judges the actual braking reaction distance of the vehicle.
In the embodiment of the invention, a Stopping Distance (mm) is one of key parameters for measuring the braking performance of a vehicle, which means that when people brake the vehicle at a certain speed, the Distance the vehicle travels from the beginning to the time when the vehicle is completely stationary, namely the Distance the vehicle travels from the beginning to the time when a driver suddenly steps on a brake pedal at a certain initial speed to the time when the vehicle is completely stopped; the device comprises a reaction distance part and a braking distance part; the smaller the braking distance is, the better the braking performance of the automobile is; therefore, the accurate control of the braking distance of the automobile plays an important role in guaranteeing the driving safety.
The length of the braking distance is related to the running speed, the braking force and the adhesion coefficient. The higher the running speed, the longer the braking distance, and the running speed is proportional to the square of the braking distance. The braking force is a force that hinders and causes the wheels to stop rotating when the driver depresses the brake pedal. The magnitude of the braking force depends on the adhesion coefficient of the wheels to the ground, besides the distance of the brake pedal, and the smoother the road (such as an icy road), the smaller the adhesion coefficient, and the longer the braking distance. Experiments prove that the braking distances of the motor vehicles are different when the motor vehicles run on different roads at the same speed. For example, a braking distance on an asphalt road surface is 5.9 meters, a braking distance on a snowy road surface is 17.7 meters, and a braking distance on an icy road surface is 35.4 meters when the vehicle is driven at a speed of 30 km/h.
Specifically, a brake stroke sensor may be provided on a brake pedal of the vehicle, and when the vehicle brakes, the brake stroke sensor may determine an actual brake reaction distance of the vehicle and send the actual brake reaction distance to the ECU.
Step 204: and when the actual braking reaction distance is equal to the preset braking reaction distance, controlling the grille blade to be opened to the maximum opening angle.
In the embodiment of the invention, the vehicle braking process comprises two parts of a reaction distance and a braking distance, the reaction distances and the braking distances set by vehicles of different brands are different, in order to accurately determine whether the vehicle is in a braking state, the braking reaction distance of the vehicle is preset, when the ECU judges that the opening angle of the grille blade is smaller than 90 degrees, the ECU receives the actual braking reaction distance sent by the braking stroke sensor and then compares the actual braking reaction distance with the preset braking reaction distance, and when the actual braking reaction distance is equal to the preset braking reaction distance, the grille blade is controlled to be opened to the maximum opening angle of 90 degrees. When the grille blades are opened to the maximum opening angle of 90 degrees, the air resistance is increased, so that the braking distance of the vehicle is reduced, and the driving safety of a driver is ensured.
Step 205: controlling the grille vanes to close when the vehicle is stopped.
In an embodiment of the present invention, when braking of the vehicle is completed, i.e., the vehicle is completely stopped, the ECU may control the grille shutter to automatically close to avoid energy consumption at the next cold start.
In conclusion, when a driver brakes the vehicle in the high-speed running process of the vehicle, the grille blades of the active air inlet grille are actively opened to the maximum opening angle, so that the air resistance is increased to shorten the braking distance of the vehicle, and the running safety is improved; and when the braking of the vehicle is finished, the grille blades of the active air inlet grille are closed so as to avoid the consumption of energy when the cold machine is started next time.
EXAMPLE III
Referring to fig. 3, a block diagram of a control device for assisting vehicle braking according to a third embodiment of the present invention is shown, and specifically, the control device for assisting vehicle braking includes:
the opening angle judging module 301 is configured to judge whether an opening angle of a grille blade of the active grille shutter is an incomplete opening angle when the vehicle speed is within a preset vehicle speed range.
Please refer to the above detailed description of step 101, which is not redundant here.
And a braking state judgment module 302, configured to judge whether the vehicle is in a braking state if the opening angle is an incomplete opening angle.
Please refer to the above detailed description of step 102, which is not redundant.
And the grille blade opening module 303 is used for controlling the grille blade to be opened to the maximum opening angle if the vehicle is in a braking state.
Please refer to the above detailed description of step 103, which is not redundant here. In conclusion, when a driver brakes the vehicle in the high-speed running process of the vehicle, the grille blades of the active air inlet grille are actively opened to the maximum opening angle, the air resistance is increased to shorten the braking distance of the vehicle, and the running safety is improved.
Example four
Referring to fig. 4 in addition to fig. 3, a block diagram of a control device for assisting vehicle braking according to a fourth embodiment of the present invention is shown.
The grille blade opening module 303 specifically includes:
and the reaction distance determination submodule 3031 is used for determining the actual braking reaction distance of the vehicle by the braking stroke sensor.
And the grille blade opening submodule 3032 is used for controlling the grille blade to be opened to the maximum opening angle when the actual braking reaction distance is equal to the preset braking reaction distance.
After the grill blade opening module 303, the control device further includes:
a grille shutter closing module 304 for controlling the grille shutter to close when the vehicle is stopped.
In conclusion, when a driver brakes the vehicle in the high-speed running process of the vehicle, the grille blades of the active air inlet grille are actively opened to the maximum opening angle, so that the air resistance is increased to shorten the braking distance of the vehicle, and the running safety is improved; and when the braking of the vehicle is finished, the grille blades of the active air inlet grille are closed so as to avoid the consumption of energy when the cold machine is started next time.
EXAMPLE five
The embodiment of the invention discloses a vehicle which can be provided with the control device for assisting the vehicle braking in the second embodiment and the third embodiment. The vehicle has the following advantages due to the device:
when a driver brakes the vehicle in the high-speed running process of the vehicle, the grille blades of the active air inlet grille are actively opened to the maximum opening angle, the air resistance is increased to shorten the braking distance of the vehicle, and the running safety is improved; and when the braking of the vehicle is finished, the grille blades of the active air inlet grille are closed so as to avoid the consumption of energy when the cold machine is started next time.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A control method for assisting braking of a vehicle, applied to the vehicle, characterized in that the method comprises:
when the vehicle speed is within a preset vehicle speed range, judging whether the opening angle of a grille blade of the active air inlet grille is an incomplete opening angle or not;
if the opening angle is not the fully-opened angle, judging whether the vehicle is in a braking state;
and if the vehicle is in a braking state, controlling the grille blades to be opened to the maximum opening angle.
2. The method of claim 1, wherein the step of controlling the grille shutter to open to a maximum opening angle if the vehicle is in a braking state comprises:
if the vehicle is in a braking state, the braking travel sensor judges the actual braking reaction distance of the vehicle;
and when the actual braking reaction distance is equal to the preset braking reaction distance, controlling the grille blade to be opened to the maximum opening angle.
3. The control method of assisting vehicle braking according to claim 1, characterized in that the method further comprises:
controlling the grille vanes to close when the vehicle is stopped.
4. A control method of assisting vehicle braking according to claim 1, characterised in that the not fully opened angle is less than 90 °.
5. The control method of assisting vehicle braking according to claim 1, wherein the preset vehicle speed range is 80km/h to 120 km/h.
6. A control device for assisting braking of a vehicle, applied to the vehicle, characterized in that it comprises:
the opening angle judging module is used for judging whether the opening angle of the grille blade of the active air inlet grille is an incomplete opening angle or not when the vehicle speed is within a preset vehicle speed range;
the braking state judging module is used for judging whether the vehicle is in a braking state or not if the opening angle is an incomplete opening angle;
and the grille blade opening module is used for controlling the grille blade to be opened to the maximum opening angle if the vehicle is in a braking state.
7. The control device for assisting vehicle braking according to claim 6, wherein the grille blade opening module includes:
the reaction distance judgment submodule is used for judging the actual braking reaction distance of the vehicle by the braking stroke sensor;
and the grille blade opening submodule is used for controlling the grille blade to be opened to the maximum opening angle when the actual braking reaction distance is equal to the preset braking reaction distance.
8. The control device for assisting braking of a vehicle according to claim 6, characterized by further comprising:
a grille shutter closing module for controlling the grille shutter to close when the vehicle is stopped.
9. A control device for assisting vehicle braking according to claim 6 wherein the incomplete opening angle is less than 90 °.
10. The control device for assisting vehicle braking according to claim 6, wherein the preset vehicle speed range is 80km/h to 120 km/h.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811270012.0A CN111098835B (en) | 2018-10-29 | 2018-10-29 | Control method and device for assisting vehicle braking |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811270012.0A CN111098835B (en) | 2018-10-29 | 2018-10-29 | Control method and device for assisting vehicle braking |
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| CN111098835A CN111098835A (en) | 2020-05-05 |
| CN111098835B true CN111098835B (en) | 2021-03-26 |
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| CN114274764B (en) * | 2021-12-15 | 2023-06-09 | 东风汽车集团股份有限公司 | Method, device and equipment for controlling air inlet grille blade and readable storage medium |
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| GB2519866A (en) * | 2014-10-21 | 2015-05-06 | Daimler Ag | Method for operating a grille of a vehicle, in particular a commercial vehicle |
| GB2531989A (en) * | 2014-08-05 | 2016-05-11 | Jaguar Land Rover Ltd | Modifying aerodynamic performance of a vehicle |
| CN106379426A (en) * | 2016-10-14 | 2017-02-08 | 江苏大学 | Pure electric automobile front cabin resistance reduction device and work method thereof |
| CN207466355U (en) * | 2017-12-01 | 2018-06-08 | 富诚汽车零部件武汉有限公司 | A kind of automobile active air-inlet grille |
| CN109139275A (en) * | 2017-06-19 | 2019-01-04 | 福特全球技术公司 | For diagnosing the method and system of the position of the active grid shutter of vehicle |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19508660A1 (en) * | 1995-03-14 | 1996-09-19 | Stefan Hofmann | Device for fastening front protective grill to vehicle |
| GB2531989A (en) * | 2014-08-05 | 2016-05-11 | Jaguar Land Rover Ltd | Modifying aerodynamic performance of a vehicle |
| GB2519866A (en) * | 2014-10-21 | 2015-05-06 | Daimler Ag | Method for operating a grille of a vehicle, in particular a commercial vehicle |
| CN106379426A (en) * | 2016-10-14 | 2017-02-08 | 江苏大学 | Pure electric automobile front cabin resistance reduction device and work method thereof |
| CN109139275A (en) * | 2017-06-19 | 2019-01-04 | 福特全球技术公司 | For diagnosing the method and system of the position of the active grid shutter of vehicle |
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