METHOD FOR OPERATING A VEHICLE VENTILATION SYSTEM, CONTROL UNIT FOR A VEHICLE AND SYSTEM

Abstract

A method for operating at least one vehicle ventilation system of at least one vehicle exhibits: the capture, by an image capture device, of an image of the face of a vehicle occupant, an investigation, by an investigative body, based on the image of the vehicle occupant's face, to determine whether the vehicle occupant feels disgust or not, and Activation, by a control device, of the vehicle's ventilation system to switch the vehicle's ventilation system from a fresh air supply operation to a recirculation operation, if the detection device determines that the vehicle occupant is experiencing disgust while the vehicle's ventilation system is set to the fresh air supply operation.

Description

[0001] The present invention relates to a method for operating a vehicle ventilation system of a vehicle, in particular a method for operating at least one vehicle ventilation system of at least one vehicle, a control device for a vehicle and a system.

[0002] Vehicles such as passenger cars are usually provided with a vehicle ventilation system which, in a fresh air supply mode, can supply the vehicle interior with fresh air from outside the vehicle, for example when the vehicle windows are closed. In order to prevent or at least reduce the penetration of unpleasant odors from outside the vehicle, for example when driving along agricultural fields freshly fertilized with liquid manure or when driving through a poorly ventilated tunnel in which a novice driver slips the clutch, the vehicle ventilation system can also be operated in recirculation mode, in which the fresh air supply from outside the vehicle is interrupted and the air present in the vehicle is recirculated.

[0003] Furthermore, methods and systems are known in which pollutant levels in the air outside the vehicle can be detected and the vehicle ventilation can be automatically switched to recirculation mode depending on the detected pollutant levels.

[0004] It is an object of the present invention to improve an operation of a vehicle ventilation system of a vehicle.

[0005] This object is achieved by the features of the independent patent claims. Further preferred embodiments of the invention are the subject of the dependent patent claims.

[0006] According to a first aspect of the present invention, a method for operating at least one vehicle ventilation system of at least one vehicle comprises: capturing, by an image capturing device, in some embodiments of the respective vehicle, an image of a face of a vehicle occupant of a vehicle, determining, by a detection device, in some embodiments of the vehicle, based on the image of the face of the vehicle occupant, whether the vehicle occupant feels disgust or not, and controlling, by a control device, in some embodiments of the vehicle, the vehicle ventilation of the vehicle in order to switch the vehicle ventilation of the vehicle from a fresh air supply mode to a recirculation mode if the determination device determines that the vehicle occupant of the vehicle feels disgust while the vehicle ventilation of the vehicle is set to the fresh air supply mode.

[0007] The above-mentioned method according to the first aspect is therefore based in particular on the fact that a (every) subject or a (every) person reacts when inhaling odors that are subjectively unpleasant to him by activating certain facial muscles, in particular by forming (pre-)determined facial expressions that can be assigned to a feeling of disgust, that is to say to one of several basic emotions (for example, seven basic emotions according to Paul Ekman (1992)).

[0008] As a result, in some versions, even if the pollutant load in the air (detected, for example, by a sensor) is too low to trigger the automatic switchover to recirculation mode in previously known vehicle ventilation systems, the recirculation mode of the vehicle ventilation can be automatically adjusted if it is detected based on the facial expression or gestures of the vehicle occupant that the vehicle occupant feels subjective disgust due to an odor that is, in particular, subjectively unpleasant.

[0009] The term “vehicle” as used herein refers specifically to a passenger car, including all types of motor vehicles, hybrid and battery-powered electric vehicles, and vehicles such as sedans, vans, buses, trucks, delivery vans, and the like.

[0010] The terms "comprises," "includes," "includes," "has," "has," "with," or any other variation thereof, as used herein, are intended to cover non-exclusive inclusion. For example, a method or apparatus that includes or has a list of elements is not necessarily limited to those elements, but may include other elements not expressly listed or that are inherent in such a method or apparatus.

[0011] Furthermore, unless explicitly stated to the contrary, "or" refers to an inclusive "or" and not an exclusive "or." For example, a condition A or B is satisfied by one of the following conditions: A is true (or present) and B is false (or absent), A is false (or absent) and B is true (or present), and both A and B are true (or present).

[0012] The terms "a" or "an" as used herein are defined as "one or more." The terms "another" and "another," and any other variations thereof, are defined as "at least one other."

[0013] The term “plurality” as used here shall mean “two or more”.

[0014] The term “configured” or “set up” to fulfil a specific function (and respective modifications thereof) is to be understood within the meaning of the invention that the corresponding device or device is already in a design or setting in which it can carry out the function or is at least adjustable - i.e. configurable - so that it can carry out the function after being set accordingly. The configuration can be carried out, for example, by appropriately setting parameters of a process sequence or of switches or the like for activating or deactivating functionalities or settings. In particular, the device or device can have a plurality of predetermined configurations or operating modes, so that the configuration can be carried out by selecting one of these configurations or operating modes.

[0015] Preferred embodiments of the invention and further developments thereof are described below, which can be combined with one another as desired, unless this is expressly excluded.

[0016] In some embodiments, the determining device determines that the vehicle occupant of the vehicle feels disgust when, based on image processing of the image of the face of the vehicle occupant of the vehicle performed by the determining device, in some embodiments by executing an image processing program stored in a memory device of the vehicle, it is recognized that a nose of the vehicle occupant of the vehicle is wrinkled and / or eyebrows of the vehicle occupant of the vehicle are furrowed and / or a lower lip and / or a chin of the vehicle occupant of the vehicle is raised.

[0017] By executing the image processing program, for example, object recognition can be performed to recognize the face of the vehicle occupant in the captured image of the vehicle occupant's face, and an emotion analysis can be performed regarding a current emotion of the vehicle occupant based on the image of the face or the recognized face of the vehicle occupant. The emotion analysis can be classified into the emotions of joy, sadness, surprise, fear, anger, disgust, and contempt, for example. This classification can be performed, for example, by comparing the image of the vehicle occupant's face with a plurality of different face images stored in the storage device, each associated with a respective emotion.

[0018] In some embodiments, the method further comprises: determining, by a position determining device, in some embodiments of the vehicle, a position of the vehicle if the determining device determines that the vehicle occupant feels disgust, transmitting, by a communication device of the vehicle, information that the vehicle occupant feels disgust, together with the determined position of the vehicle, to a server device, in some embodiments to a communication device of the server device, determining, by the server device, in some embodiments by controlling the communication device by a control device of the server device, in order to retrieve from further vehicles, in particular a respective communication device thereof, a respective position of the respective further vehicle, which is determined by a respective position determination device of the respective further vehicle, and by determining a respective distance, by the control device, between the respective position of the respective further vehicle and the position of the vehicle, whether at least one further vehicle is within a predetermined distance from the determined position of the vehicle or not, and if the server device determines that at least one further vehicle is located within the predetermined distance from the specific position of the vehicle, a transmission, by the server device, in some embodiments via the communication device of the server device, of a command to a vehicle ventilation system, in some embodiments via the communication device of the at least one further vehicle, of the at least one further vehicle, in order to switch the vehicle ventilation system of the at least one further vehicle from a fresh air supply mode to a recirculation mode if the vehicle ventilation system of the at least one further vehicle is set to the fresh air supply mode.

[0019] In some embodiments, this can prevent the unpleasant odor that is perceptible at least at the specific position of the vehicle from penetrating into another vehicle located within the specified distance from the specific position of the vehicle, since the vehicle ventilation of the other vehicle is automatically switched to recirculation mode if necessary.

[0020] The term "communication device" or "communication apparatus" used here refers in particular to a device or apparatus for wireless communication. This can be a single unit or multiple units interacting together. In particular, a communication device or apparatus can comprise a control device, a transmitter and receiver, and at least one corresponding antenna. In a vehicle, a communication device or apparatus can be distributed throughout the vehicle.

[0021] In some embodiments, the transmission, by the server device, of the command to the vehicle ventilation of the at least one further vehicle comprises transmission, by the server device, of a command to the vehicle ventilation of the at least one further vehicle in order to switch the vehicle ventilation of the at least one further vehicle from the fresh air supply mode to the recirculation mode for a predetermined period of time when the vehicle ventilation of the at least one further vehicle is set to the fresh air supply mode, and to switch the vehicle ventilation of the at least one further vehicle to the fresh air supply mode after the predetermined period of time has elapsed.

[0022] In some embodiments, this makes it possible for fresh air to be automatically supplied to the interior of at least one other vehicle after the specified period of time has elapsed in order to improve the air quality in the interior.

[0023] In some embodiments, if the server device determines that several additional vehicles are located within the predetermined distance from the specific position of the vehicle, the transmission, by the server device, of the command to the vehicle ventilation of the at least one additional vehicle comprises transmission, by the server device, of a respective command to a respective vehicle ventilation of a respective one of the plurality of additional vehicles in order to switch the respective vehicle ventilation of the respective one of the plurality of additional vehicles from a fresh air supply mode to the recirculation mode for a respective predetermined period of time if the respective vehicle ventilation of the respective one of the plurality of additional vehicles is set to the fresh air supply mode, and to switch the respective vehicle ventilation of the respective one of the plurality of additional vehicles to the fresh air supply mode after the respective predetermined period of time has elapsed.whereby the respective specified time periods are different.,

[0024] The smallest specified time period can be, for example, 1 minute, and the next specified time periods can be, for example, 2 minutes, 3 minutes, 4 minutes, 5 minutes, etc.

[0025] In some embodiments, the method further comprises: a successive capture, after expiry of the respective predetermined period of time, by a respective further image capture device, of a respective image of a respective face of a respective vehicle occupant of a respective one of the several further vehicles, and a determination, by a respective further determination device, on the basis of the respective image of the respective face of the respective vehicle occupant of a respective one of the several further vehicles, whether the respective vehicle occupant feels disgust or not, wherein if one of the respective further determination devices determines that the respective vehicle occupant does not feel disgust, the server device transmits a respective command to the other of the respective vehicle ventilation systems in order to set them to recirculation mode for a predetermined period of time, wherein the predetermined period of time is greater than or equal to a difference between that of the respective predetermined periods of time after which it was determined that the respective vehicle occupant feels disgust and the respective predetermined period of time if the difference is greater than 0 seconds, and otherwise no command is transmitted by the server device to the respective vehicle ventilation systems in order to set them to recirculation mode.

[0026] In some versions, this can prevent the unpleasant smell from penetrating the interior of at least some of the other vehicles because the corresponding vehicle ventilation was switched (back) to fresh air supply mode too early.

[0027] In some embodiments, the method further comprises illuminating, by an illuminating device, the face of the vehicle occupant with infrared light while capturing, by the image capturing device, the image of the face of the vehicle occupant.

[0028] In some versions, this makes it possible to detect whether the vehicle occupant feels disgust or not, regardless of the brightness, i.e. even in the dark.

[0029] A second aspect of the present invention relates to a control unit for a vehicle, wherein the control unit is configured to carry out a method described above for operating a vehicle ventilation system of a (single) vehicle.

[0030] In some embodiments, the controller may include the image capture device, the detection device, the control device, and the storage device.

[0031] A third aspect of the present invention relates to a system comprising a server device and a vehicle and a plurality of further vehicles, wherein the system is configured to carry out a method described above for operating at least one vehicle ventilation system of at least one vehicle.

[0032] The features and advantages explained with respect to the first aspect of the invention also apply accordingly to the further aspects of the invention.

[0033] Further advantageous developments will become apparent from the following description of preferred embodiments. This is shown, partly schematically: Fig. 1 a flowchart illustrating a method for operating at least one vehicle ventilation system of at least one vehicle according to an embodiment, and Fig. 2 a system configured to carry out the method for operating at least one vehicle ventilation system of at least one vehicle according to one embodiment.

[0034] Fig. 1 shows a flowchart illustrating a method for operating at least one vehicle ventilation system of at least one vehicle according to an embodiment, and Fig. 2 shows a system configured to carry out the method for operating at least one vehicle ventilation system of at least one vehicle according to one embodiment.

[0035] With reference to Fig. 2, the system comprises a vehicle 100, several further vehicles 100-1, 100-2 and a server device 1000, which has a communication device 1010, a control device 1020 and a storage device 1030 in which a program for operating the server device 1000 is stored.

[0036] The vehicle 100 and the several further vehicles 100-1, 100-2 each have a respective vehicle ventilation 110, 110-1, 110-2, which can each be operated in a fresh air supply mode and a recirculation mode.

[0037] The vehicle 100 and the plurality of further vehicles 100-1, 100-2 each further comprise a respective image capture device 120, 120-1, 120-2, for example in the form of a camera, in particular an infrared camera, for capturing a respective image of a respective face of a respective vehicle occupant 200, 200-1, 200-2 of a respective vehicle 100, 100-1, 100-2.

[0038] In addition, the vehicle 100 and the plurality of further vehicles 100-1, 100-2 each have a respective determination device 130, 130-1, 130-2 for determining, based on the respective image of the respective face of the respective vehicle occupant of the respective vehicle 100, 100-1, 100-2, whether the respective vehicle occupant 200, 200-1, 200-2 of a respective vehicle 100, 100-1, 100-2 feels disgust or not, and a respective control device 140, 140-1, 140-2 for controlling the respective vehicle ventilation 110, 110-1, 110-2.

[0039] Furthermore, the vehicle 100 and the plurality of further vehicles 100-1, 100-2 each have a respective position determination device 150, 150-1, 150-2 for determining a respective position of the respective vehicle 100, 100-1, 100-2, a respective communication device 160, 160-1, 160-2 for communicating with the server device 1000, in some embodiments with the communication device 1010 of the server device 1000, a respective storage device 180, 180-1, 180-2, and a respective illumination device 170, 170-1, 170-2, which can be configured to emit infrared light.

[0040] The respective position determining devices 150, 150-1, 150-2 can be designed, for example, as satellite navigation receivers which can autonomously determine the respective position of the respective vehicle 100, 100-1, 100-2 in a satellite navigation system.

[0041] A respective control unit of a respective vehicle 100, 100-1, 100-2 can have a respective image capture device 120, 120-1, 120-2, a respective determination device 130, 130-1, 130-2, a respective control device 140, 140-1, 140-2, a respective position determination device 150, 150-1, 150-2, a respective communication device 160, 160-1, 160-2, and a respective storage device 180, 180-1, 180-2.

[0042] With reference to Fig. 1, in a step S1 of the method 10 for operating at least one vehicle ventilation system 110, 110-1, 110-2 of at least one vehicle 100, 100-1, 100-2, an image of a face of a vehicle occupant 200 of a vehicle 100 is captured by an image capture device 120.

[0043] Then, in a step S2, a determination device 130, in some embodiments of the vehicle 100, determines, based on the image of the face of the vehicle occupant 200 of the vehicle 100, whether the vehicle occupant 200 of the vehicle 100 feels disgust or not.

[0044] Subsequently, in a step S3, a control device 140, in some embodiments of the vehicle 100, controls the vehicle ventilation 110 of the vehicle 100 in order to switch the vehicle ventilation 110 of the vehicle 100 from a fresh air supply mode to a recirculation mode if the determination device 130 determines that the vehicle occupant 200 of the vehicle 100 feels disgust while the vehicle ventilation 110 of the vehicle 100 is set to the fresh air supply mode.

[0045] In this case, the determination device 130 can determine that the vehicle occupant 200 of the vehicle 100 feels disgust if, based on image processing of the image of the face of the vehicle occupant 200 of the vehicle 100 performed by the determination device 130, in some embodiments by executing an image processing program stored in a memory device 180 of the vehicle, it is recognized that a nose of the vehicle occupant 200 of the vehicle 100 is wrinkled and / or eyebrows of the vehicle occupant 200 of the vehicle 100 are furrowed and / or a lower lip and / or a chin of the vehicle occupant 200 of the vehicle 100 is raised.

[0046] In a step S4, the position of the vehicle 100 is determined by a position-determining device 150 if the determining device 130 determines that the vehicle occupant 200 feels disgust. Subsequently, in a step S5, a communication device 160 of the vehicle 100 transmits information about the fact that the vehicle occupant 200 feels disgust, along with the determined position of the vehicle 100, to a server device 1000, in particular a communication device 1010 of the server device 1000.

[0047] In a step S6, the server device 1000 determines whether or not at least one other vehicle 100-1, 100-2 is located within a predetermined distance from the determined position of the vehicle 100.

[0048] For this purpose, the server device 1000 can communicate, for example, via the communication device 1010 with the communication devices 160 of the further vehicles 100-1, 100-2 in order to retrieve from them the respective position of the respective further vehicle 100-1, 100-2 determined by the respective position determination device 150-1, 150-2, and to determine the respective distance of the respective further vehicle 100-1, 100-2 from the vehicle 100 based on the respective positions of the vehicle 100 and the further vehicles 100-1, 100-2.

[0049] If in step S6 the server device 1000 determines that at least one further vehicle 100-1, 100-2 is located within the predetermined distance from the determined position of the vehicle 100, in a step S7 the server device 1000 transmits a command to a vehicle ventilation system 110-1, 110-2 of the at least one further vehicle 100-1, 100-2 in order to switch the vehicle ventilation system 110-1, 110-2 of the at least one further vehicle 100-1, 100-2 from the fresh air supply mode to the recirculation mode if the vehicle ventilation system 110-1, 110-2 of the at least one further vehicle 100-1, 100-2 is set to the fresh air supply mode.

[0050] In some embodiments, the transmission in step S7 by the server device 1000 of the command to the vehicle ventilation 110-1, 110-2 of the at least one further vehicle 100-1, 100-2 comprises a transmission, by the server device 1000, of a command to the vehicle ventilation 110-1, 110-2 of the at least one further vehicle 100-1, 100-2 to switch the vehicle ventilation 110-1, 110-2 of the at least one further vehicle 100-1, 100-2 from the fresh air supply mode to the recirculation mode for a predetermined period of time if the vehicle ventilation 110-1, 110-2 of the at least one further vehicle 100-1, 100-2 is set to the fresh air supply mode, and after the predetermined period of time has elapsed, the vehicle ventilation 110-1, 110-2 of the to convert at least one further vehicle 100-1, 100-2 to fresh air supply operation.

[0051] In this case, if it is determined in step S6 by the server device 1000 that several further vehicles 100-1, 100-2 are located within the predetermined distance from the determined position of the vehicle 100, the transmission in step S7 by the server device 1000 of the command to the vehicle ventilation 110-1, 110-2 of the at least one further vehicle 100-1, 100-2 may comprise a transmission, by the server device 1000, of a respective command to a respective vehicle ventilation 110-1, 110-2 of a respective one of the several further vehicles 100-1, 100-2 in order to switch the respective vehicle ventilation 110-1, 110-2 of the respective one of the several further vehicles 100-1, 100-2 from the fresh air supply mode to the recirculation mode for a respective predetermined period of time when the respective vehicle ventilation 110-1, 110-2 of the respective one of the several additional vehicles 100-1, 100-2 is set to fresh air supply mode,and after the respective specified time period has elapsed, to switch the respective vehicle ventilation 110-1, 110-2 of the respective one of the several further vehicles 100-1, 100-2 to fresh air supply mode, wherein the respective specified time periods are different.

[0052] In a step S8, after the respective predetermined time period has elapsed, a respective further image capture device 120-1, 120-2 can successively capture a respective image of a respective face of a respective vehicle occupant 200-1, 200-2 of a respective one of the plurality of further vehicles 100-1, 100-2, and a determination can be made by a respective further determination device 130-1, 130-2, based on the respective image of the respective face of the respective vehicle occupant 200-1, 200-2 of a respective one of the plurality of further vehicles 100-1, 100-2, whether the respective vehicle occupant 200-1, 200-2 feels disgust or not.

[0053] If one of the respective further determination devices 130-1, 130-2 determines that the respective vehicle occupant 200-1, 200-2 does not feel disgust, the server device 1000 can transmit a respective command to the other of the respective vehicle ventilation systems 110-1, 110-2 in a step S9 in order to set them to the recirculation mode for a predetermined period of time, wherein the predetermined period of time is greater than or equal to a difference between that of the respective predetermined periods of time after which it was determined that the respective vehicle occupant 200-1, 200-2 does not feel disgust and the respective predetermined period of time if the difference is greater than 0 seconds, and otherwise no command is transmitted by the server device 1000 to the respective vehicle ventilation systems 110-1, 110-2 in order to set them to the recirculation mode.

[0054] In some embodiments, the method may further comprise a step S10 of illuminating, by a respective illumination device 170, 170-1, 170-2, the respective face of the respective vehicle occupant 200, 200-1, 200-2 of the respective vehicle 100, 100-1, 100-2, with infrared light, while capturing, by the respective image capturing device 120, 120-1, 102-2, the respective image of the respective face of the respective vehicle occupant 200, 200-1, 200-2.

Claims

[1] Method (10) for operating at least one vehicle ventilation system (110, 110-1, 110-2) of at least one vehicle (100, 100-1, 100-2), comprising: capturing (S1), by an image capturing device (120), an image of a face of a vehicle occupant (200) of a vehicle (100), determining (S2), by a determining device (130), based on the image of the face of the vehicle occupant (200) of the vehicle (100), whether the vehicle occupant (200) of the vehicle (100) feels disgust or not, and controlling (S3), by a control device (140), the vehicle ventilation (110) of the vehicle (100) in order to switch the vehicle ventilation (110) of the vehicle (100) from a fresh air supply mode to a recirculation mode if the determination device (130) determines that the vehicle occupant (200) of the vehicle (100) feels disgust while the vehicle ventilation (110) of the vehicle (100) is set to the fresh air supply mode. [2] Method (10) according to claim 1, wherein the determination device (130) determines that the vehicle occupant (200) of the vehicle (100) feels disgust when, based on image processing of the image of the face of the vehicle occupant (200) of the vehicle (100) carried out by the determination device (130), in particular by executing an image processing program stored in a memory device (180) of the vehicle (100), it is recognized that a nose of the vehicle occupant (200) of the vehicle (100) is wrinkled and / or eyebrows of the vehicle occupant (200) of the vehicle (100) are drawn together and / or a lower lip and / or a chin of the vehicle occupant (300) of the vehicle (100) is raised. [3] Method (10) according to claim 1 or 2, further comprising: determining (S4), by a position determining device (150), a position of the vehicle (100) if the determining device (130) determines that the vehicle occupant (200) feels disgust, transmitting (S5), by a communication device (160) of the vehicle (100), information that the vehicle occupant (200) feels disgust, together with the determined position of the vehicle (100), to a server device (1000), determining (S6), by the server device (1000), whether or not at least one other vehicle (100-1, 100-2) is located within a predetermined distance from the determined position of the vehicle (100), and if the server device (1000) determines that at least one further vehicle (100-1, 100-2) is located within the predetermined distance from the determined position of the vehicle (100), transmitting (S7), by the server device (1000), a command to a vehicle ventilation system (110-1, 110-2) of the at least one further vehicle (100-1, 100-2) in order to switch the vehicle ventilation system (110-1, 110-2) of the at least one further vehicle (100-1, 100-2) from a fresh air supply mode to a recirculation mode when the vehicle ventilation system (110-1, 110-2) of the at least one further vehicle (100-1, 100-2) is set to the fresh air supply mode. [4] Method (10) according to the preceding claim, wherein the transmission (S7) by the server device (1000) of the command to the vehicle ventilation (110-1, 110-2) of the at least one further vehicle (100-1, 100-2) comprises a transmission, by the server device (1000), of a command to the vehicle ventilation (110-1, 110-2) of the at least one further vehicle (100-1, 100-2) to switch the vehicle ventilation (110-1, 110-2) of the at least one further vehicle (100-1, 100-2) from the fresh air supply mode to the recirculation mode for a predetermined period of time when the vehicle ventilation (110-1, 110-2) of the at least one further vehicle (100-1, 100-2) is set to the fresh air supply mode, and after the expiration of the predetermined period of time to switch the vehicle ventilation (110-1, 110-2) of the at least one further vehicle (100-1, 100-2) to fresh air supply mode. [5] Method according to one of claims 3 or 4, wherein, if the server device (1000) determines that several further vehicles (100-1, 100-2) are located within the predetermined distance from the determined position of the vehicle (100), the transmission (S7) by the server device (1000) of the command to the vehicle ventilation (110-1, 110-2) of the at least one further vehicle (100-1, 100-2) comprises a transmission, by the server device (1000), of a respective command to a respective vehicle ventilation (110-1, 110-2) of a respective one of the several further vehicles (100-1, 100-2) in order to switch the respective vehicle ventilation (110-1, 110-2) of the respective one of the several further vehicles (100-1, 100-2) from a fresh air supply mode to the recirculation mode for a respective predetermined period of time to switch over if the respective vehicle ventilation (110-1, 110-2) of the respective one of the several additional vehicles (100-1,100-2) is set to fresh air supply mode, and after the respective predetermined time period has elapsed, the respective vehicle ventilation (110-1, 110-2) of the respective one of the several further vehicles (100-1, 100-2) is switched to fresh air supply mode, wherein the respective predetermined time periods are different. [6] Method according to the preceding claim, further comprising: a successive detection (S8), after expiration of the respective predetermined time period, by a respective further image detection device (120-1, 120-2), of a respective image of a respective face of a respective vehicle occupant (200-1, 200-2) of a respective one of the plurality of further vehicles (100-1, 100-2), and a determination, by a respective further determination device (130-1, 130-2), based on the respective image of the respective face of the respective vehicle occupant (200-1, 200-2) of a respective one of the plurality of further vehicles (100-1, 100-2), whether the respective vehicle occupant (200-1, 200-2) feels disgust or not, wherein if it is determined by one of the respective further determination devices (130-1, 130-2) that the respective vehicle occupant (200-1, 200-2) does not feel disgust, a respective command is transmitted by the server device (1000) to the other of the respective vehicle ventilation systems (110-1, 110-2) (S9) in order to set them to the recirculation mode for a predetermined period of time, wherein the predetermined period of time is greater than or equal to a difference between that of the respective predetermined periods of time after which it was determined that the respective vehicle occupant (200-1, 200-2) does not feel disgust and the respective predetermined period of time if the difference is greater than 0 seconds, and otherwise no command is transmitted by the server device (1000) to the respective vehicle ventilation systems (110-1, 110-2) in order to set them to the recirculation mode. [7] Method according to one of the preceding claims, further comprising illuminating (S10), by an illuminating device (170), the face of the vehicle occupant (200) with infrared light, while capturing, by the image capturing device (120), the image of the face of the vehicle occupant (200). [8] Control device for a vehicle (100, 100-1, 100-2), wherein the control device is configured to carry out a method according to one of claims 1 or 2 or according to claim 7 and claim 1 or claim 2. [9] Control device according to claim 8, comprising the image capturing device (120, 120-1, 120-2), the determining device (130, 130-1, 130-2), the control device (140, 140-1, 140-2), and the storage device (180, 180-1, 180-2). [10] System comprising a server device (1000) and a vehicle (100) and a plurality of further vehicles (100-1, 100-2), wherein the system is configured to carry out a method according to one of claims 1 to 7.

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