Method and device for controlling a vehicle display system based on an aerodynamic performance level

Abstract

The present invention relates to a method and device for controlling a display system in a vehicle equipped with an adaptive cruise control system, known as the ACC system, comprising a screen. The method includes receiving (51) first data representing an activation state of the ACC system, receiving (52) second data representing a value of a parameter setting for a target inter-vehicle distance, known as the target DIV, of the ACC system, and determining (53) a level of aerodynamic performance of the vehicle based on the first and second data. A graphic object is displayed (54) according to the level of aerodynamic performance in a first area of ​​the screen. Figure 5 (for the abstract)

Description

Title of the invention: Method and device for controlling a vehicle display system based on an aerodynamic performance level Technical field

[0001] The present invention relates to methods and devices for controlling a display system of a vehicle, in particular a motor vehicle. The present invention also relates to a method and device for regulating the speed of a vehicle. Technological background

[0002] Some contemporary vehicles are equipped with functions or system(s) or driving assistance, known as AD AS (from the English “Advanced Driver-Assistance System” or in French “Advanced Driving Assistance System”).

[0003] Among these systems, the adaptive cruise control system, known as ACC (from the English "Adaptive Cruise Control"), has as its primary function the automatic regulation, in an adaptive manner, of the speed of the vehicles equipped therewith according to their environment. Such an ACC system determines one or more acceleration and / or braking instructions according to a speed instruction and information relating to the environment of the vehicle, the acceleration and / or braking instruction(s) being capable of regulating the speed of the vehicle in an adaptive manner, that is to say by taking into account the environment of the vehicle.

[0004] This environmental information corresponds, for example, to the distance between the vehicle equipped with the ACC system and a vehicle traveling in front of it, to the speed (for example relative) of the vehicle traveling in front, to the acceleration (or deceleration) of the vehicle traveling in front and / or to a regulatory speed limit. Such a vehicle is called a target vehicle or target object of the ACC system. The acceleration instruction(s) are, for example, determined from a control law based on estimates of the torque supplied by a powertrain (for example a thermal or electric engine) to one or more wheels of the vehicle and the current acceleration of the vehicle.

[0005] Aerodynamic performance, determined in particular by a coefficient of penetration into the air commonly called Cx or the drag of a vehicle, is an important criterion for an electric vehicle traveling at high speed, such as on a highway or fast lane. It directly impacts the autonomy of such a vehicle. The lower a vehicle's coefficient of penetration into the air, the more efficient it will be, and therefore the more it will be able to travel long distances at high speed for the same amount of on-board energy.

[0006] Furthermore, various studies have examined the effects that the drafting phenomenon could have on the performance of vehicles, such as in competition, where the speed of the vehicle benefiting from the drafting phenomenon is increased. The results show that the greatest benefits are observed when the speed is high. Indeed, at high travel speeds and for the same coefficient of penetration in the air, the aerodynamic force generated by air resistance is greater than at low speed, but is lower when the vehicle benefits from the suction of another vehicle in front of it.

[0007] The energy impact of an electric vehicle, even at an average speed, is reduced by reducing the aerodynamic force generated by air resistance, this resulting in a reduction in the energy consumption on board a battery on board the electric vehicle for the same autonomy, or by a greater autonomy for the same quantity of energy stored in a battery on board the electric vehicle. Summary of the present invention

[0008] An object of the present invention is to solve at least one of the problems of the technological background described above.

[0009] Another object of the present invention is to improve the autonomy of a vehicle, in particular an electric vehicle.

[0010] Another object of the invention is to improve the efficiency of a vehicle, particularly an electric vehicle.

[0011] According to a first aspect, the present invention relates to a method for controlling a display system of a vehicle incorporating an adaptive speed control system, called an ACC system, the display system comprising a screen, the method comprising the following steps: - reception of first data representative of an activation state of the ACC system; - reception of second data representative of a value of a parameter for adjusting a target inter-vehicle distance, called target DIV, of the ACC system; - determination of a level of aerodynamic performance of the vehicle based on the first and second data; - display control of a graphic object based on the level of aerodynamic performance in a first area of ​​the screen.

[0012] A driver of the vehicle then has information relating to the aerodynamic performance of his vehicle and is thus able to adapt his driving in order to optimize this aerodynamic performance.

[0013] According to a variant of the method, the graphic object is displayed when the first data are representative of an active state of the ACC system and for which the object graph is not displayed when the first data is representative of an inactive state of the ACC system.

[0014] Thus, no information relating to the aerodynamic performance of the vehicle is displayed when the ACC system is inactive.

[0015] According to another variant, the method further comprises a step of selecting the graphic object from a plurality of candidate graphic objects, each candidate graphic object of the plurality being representative of a value of the adjustment parameter selectable from a determined list.

[0016] The various graphic objects make it possible to moderate the information relating to the aerodynamic performance of the vehicle according to a setting parameter of the target DIV.

[0017] According to another variant of the method, the plurality comprises three candidate graphic objects.

[0018] The ACC system therefore has three parameters for adjusting the target DIV.

[0019] According to an additional variant, the method comprises a step of receiving third data representative of a current speed of the vehicle.

[0020] According to another variant of the method, the speed of the vehicle is compared to a threshold value, the display control being a function of a result of the comparison.

[0021] A graphic object is therefore displayed according to the speed of the vehicle.

[0022] According to yet another variant of the method, the threshold value is equal to 100 km / h.

[0023] According to a second aspect, the present invention relates to a device for controlling a display system of a vehicle, the device comprising a memory associated with a processor configured for implementing the steps of the method according to the first aspect of the present invention.

[0024] According to a third aspect, the present invention relates to a vehicle, for example of the automobile type, comprising a device as described above according to the second aspect of the present invention.

[0025] According to a fourth aspect, the present invention relates to a computer program which comprises instructions adapted for executing the steps of the method according to the first aspect of the present invention, in particular when the computer program is executed by at least one processor.

[0026] Such a computer program may use any programming language, and be in the form of source code, object code, or intermediate code between source code and object code, such as in a partially compiled form, or in any other desirable form.

[0027] According to a fifth aspect, the present invention relates to a computer-readable recording medium on which is recorded a computer program comprising instructions for carrying out the steps of the method according to the first aspect of the present invention.

[0028] On the one hand, the recording medium may be any entity or device capable of storing the program. For example, the medium may comprise a storage means, such as a ROM memory, a CD-ROM or a microelectronic circuit type ROM memory, or a magnetic recording means or a hard disk.

[0029] Furthermore, this recording medium may also be a transmissible medium such as an electrical or optical signal, such a signal being able to be conveyed via an electrical or optical cable, by conventional or hertzian radio or by self-directed laser beam or by other means. The computer program according to the present invention may in particular be downloaded from an Internet-type network.

[0030] Alternatively, the recording medium may be an integrated circuit in which the computer program is incorporated, the integrated circuit being adapted to perform or to be used in performing the method in question. Brief description of the figures

[0031] Other characteristics and advantages of the present invention will emerge from the description of the particular and non-limiting exemplary embodiments of the present invention below, with reference to the appended figures 1 to 5, in which:

[0032] [Fig-1] schematically illustrates an environment of a vehicle, according to an example particular and non-limiting embodiment of the present invention;

[0033] [Fig.2] schematically illustrates a passenger compartment of the vehicle of [Fig.l], according to a particular and non-limiting exemplary embodiment of the present invention;

[0034] [Fig.3] schematically illustrates a screen on board the vehicle of [Fig.1], according to a particular and non-limiting exemplary embodiment of the present invention;

[0035] [Fig.4] schematically illustrates a device configured to control a display system of the vehicle of [Fig.l], according to a particular and non-limiting exemplary embodiment of the present invention;

[0036] [Fig.5] illustrates a flowchart of the different steps of a method for controlling a display system of the vehicle of [Fig.l], according to a particular and non-limiting exemplary embodiment of the present invention. Description of examples of implementation

[0037] A method and a device for controlling a display system of a vehicle will now be described in the following with joint reference to Figures 1 to 5. The same elements are identified with the same reference signs throughout the description which follows.

[0038] The terms “first(s)”, “second(s)” (or “first(s)”, “second(s)”), etc. are used in this document by arbitrary convention to allow identification and to distinguish different elements (such as operations, means, etc.) implemented in the embodiments described below. Such elements may be distinct or correspond to a single element, depending on the embodiment.

[0039] According to a particular and non-limiting example of embodiment of the present invention, a method for controlling a display system of a vehicle incorporating an adaptive speed control system, called ACC system, and comprising a screen, comprises the reception of first data representative of an activation state of the ACC system and the reception of second data representative of a value of a parameter for adjusting a target inter-vehicle distance, called target DIV, of the ACC system.

[0040] An aerodynamic performance level of the vehicle is then determined based on the first and second data and a display of a graphical object is controlled based on the aerodynamic performance level in a first area of ​​the screen.

[0041] [Fig.l] illustrates a vehicle 10, for example a motor vehicle, traveling on a portion of road in the environment 1. According to other examples, the vehicle 10 corresponds to a coach, a bus, a truck, a utility vehicle or a motorcycle, that is to say a vehicle of the motorized land vehicle type.

[0042] The vehicle 10 corresponds to a vehicle traveling under the total supervision of a driver or traveling in a semi-autonomous mode. The vehicle 10 travels according to a level of autonomy equal to 0 or according to a level of autonomy ranging from 1 to 2 for example, according to the scale defined by the American federal agency which has established 5 levels of autonomy ranging from 1 to 5, level 0 corresponding to a vehicle having no autonomy, the driving of which is under the total supervision of the driver, level 1 corresponding to a vehicle with a minimal level of autonomy, the driving of which is under the supervision of the driver with minimal assistance from an AD AS system, and level 5 corresponding to a completely autonomous vehicle.

[0043] The 5 levels of autonomy of the classification of the federal agency responsible for road safety are: - level 0: no automation, the vehicle driver has full control over the main functions of the vehicle (engine, accelerator, steering, brakes); - level 1: driver assistance, automation is active for certain vehicle functions, the driver retaining overall control over the vehicle's driving; cruise control is part of this level, as are other aids such as ABS (anti-lock braking system) or ESP (programmed electro-stabilizer); - level 2: automation of combined functions, the control of at least two main functions is combined in the automation to replace the driver in certain situations; for example, adaptive cruise control combined with lane centering allows a vehicle to be classified as level 2, as does automatic parking assistance; - level 3: limited autonomous driving, the driver can cede complete control of the vehicle to the automated system which will then be in charge of critical safety functions; autonomous driving can however only take place in certain specific environmental and traffic conditions (only on motorways for example); - level 4: fully autonomous driving under certain conditions, the vehicle is designed to ensure all critical safety functions on its own over a complete journey; the driver provides a destination or navigation instructions but is not required to make himself available to take back control of the vehicle; - level 5: completely autonomous driving without driver assistance in all circumstances.

[0044] According to a particular exemplary embodiment, the vehicle 10 corresponds to an electric motor vehicle comprising one or more electric motors.

[0045] According to the example of [Fig.l], the vehicle 10 travels on a portion of road with two traffic lanes 1001, 1002. The vehicle 10 travels for example on the right traffic lane 1001.

[0046] The concepts of right and left are defined according to the direction of travel of the vehicle 10. The example in [Fig.l] corresponds to an example in which the vehicles travel on the right, as in France. The invention is however not limited to such an example and extends to all road configurations, including those where the vehicles travel on the left.

[0047] The vehicle 10 includes in particular one or more driving assistance systems, called AD AS (from the English “Advanced Driver-Assistance System” or in French “Système d’aide à la conduite avance”), including an automatic speed regulation system, called ACC system. Such an AD AS system is configured to assist, or even replace, the driver of the vehicle 10 to control the vehicle 10 on its journey.

[0048] The first vehicle 10 for example carries one or more of the following sensors: - one or more millimeter wave radars arranged on the vehicle 10, for example at the front, at the rear, on each front / rear corner of the vehicle; each radar is adapted to emit electromagnetic waves and to receive the echoes of these waves returned by one or more objects (for example the second vehicle 11 located in front of the vehicle 10 according to the example of [Fig.l]), with the aim of detecting obstacles and their distances from the vehicle 10; and / or - one or more LIDAR(s) (from the English “Light Detection And Ranging”, or “Detection and estimation of distance by light” in French), a sensor LIDAR corresponding to an optoelectronic system composed of a laser emitting device, a receiving device comprising a light collector (to collect the part of the light radiation emitted by the emitter and reflected by any object located in the path of the light rays emitted by the emitter) and a photodetector which transforms the collected light into an electrical signal; a LIDAR sensor thus makes it possible to detect the presence of objects (for example the second vehicle 11) located in the emitted light beam and to measure the distance between the sensor and each detected object; and / or - one or more cameras (associated or not with a depth sensor) for the acquisition of one or more images of the environment around the vehicle 10 located in the field of vision of the camera(s).

[0049] The data obtained from this or these sensors vary according to the type of sensor. When it is a radar or a LIDAR, the data correspond for example to distance data between points of the detected object and the sensor. Each detected object is thus represented by a point cloud (each point corresponding to a point of the object receiving the radiation emitted by the sensor and reflecting at least part of this radiation), the point cloud representing the envelope (or part of the envelope) of the detected object as seen by the sensor and ultimately by the vehicle 10 carrying the sensor. When it is a video camera, the data correspond to data associated with each pixel of the acquired image(s), for example gray level values ​​coded on for example 8, 10, 12 or more bits for each color channel, for example RGB (from the English “Red, Green, Blue” or in French “Rouge, vert, bleu”).These data make it possible, for example, to determine the successive positions taken by an object moving in the environment 1, for example the second vehicle 11, and to deduce therefrom one or more dynamic parameters of the moving object such as the position, the speed and / or the acceleration. These data also make it possible to determine the lines on the ground in order, for example, to participate in determining whether the second vehicle 11 and the vehicle 10 belong to the same traffic lane, for example.

[0050] The data acquired by the on-board sensor(s) feeds, for example, one or more systems on-board the vehicle 10, including the ACC system.

[0051] According to the example of [Fig.l], the vehicle 10 follows a second vehicle 11, at a distance d, the second vehicle 11 traveling on the same traffic lane 1001 as the vehicle 10 and in the same direction as the vehicle 10.

[0052] The second vehicle 11 corresponds to a target object, also called target vehicle, selected by the ACC system of the first vehicle 10.

[0053] A distance between the vehicle 10 and the second vehicle 11 constitutes an instruction provided to the ACC system, this distance being commonly called inter-distance vehicles (DIV). According to a variant, the instruction is an inter-vehicle time (TIV), however this instruction is equivalent to the DIV instruction, the speed of vehicle 10 being the coefficient of proportionality between these two instructions.

[0054] As illustrated in [Fig.2], the vehicle 10 carries at least one screen 20, corresponding for example to a screen of the LCD type (from the English “Liquid Crystal Display” or in French “Display à cristals liquide”), for example of the TFT type (from the English “Thin-Film Transistor” or in French “Transistor en film mince”), or OLED (from the English “Organic Light-Emitting Diode” or in French “Diode électroluminescente biologique”). The screen 20 is for example arranged in the center of the dashboard 21, for example above a central facade. Of course, the position of the screen 20 is not limited to this example, the screen 20 being able to be arranged in any position, for example on the central facade or behind a steering wheel 22.

[0055] The screen 20 makes it possible to display content intended for the driver and passengers of the vehicle. The screen 20 is, according to an exemplary embodiment, also configured to allow the driver and / or passengers of the vehicle 10 to interact with one or more systems embedded in the vehicle via a human-machine interface (HMI) displayed on the screen 20. For example, the screen 20 makes it possible to control the infotainment system, also called the IVI (In-Vehicle Infotainment) system of the vehicle, as well as, for example, the system responsible for the display of the vehicle 10, as described below.

[0056] According to another example, not illustrated here, the screen 20 is not integrated into the passenger compartment 10 but corresponds to a screen of a mobile communication device, such as a smartphone or a tablet, connected in communication, for example wirelessly, with the on-board system of the vehicle.

[0057] A process for controlling a display system of the vehicle 10 is advantageously implemented by the vehicle 10, that is to say by a computer or a combination of computers of the on-board system of the vehicle 10, for example by the computer(s) responsible for controlling the ACC system or by a computer of an infotainment system also called IVI system (from the English “In-Vehicle Infotainment” or in French “Infodivertissement embargo”) of the vehicle 10.

[0058] In a first operation, first data representative of an activation state of the ACC system are received. These data are for example received from another computer, via one or more communication buses of the on-board system of the vehicle 10, for example a communication bus of the CAN (Controller Area Network) or CAN FD (Controller Area Network Flexible Data-Rate) type. "Flexible Data Rate Controller Area Network"), FlexRay (according to ISO 17458), Ethernet (according to ISO / IEC 802-3) or LIN (from the English "Local Interconnect Network").

[0059] The ACC system has two activation states, a first state called "active", that is to say that a target vehicle is present in front of the vehicle 10 and selected, the second vehicle 11, the ACC system automatically adapting the speed of the vehicle 10 to that of the second vehicle 11 which precedes it to maintain a constant distance equal to the target DIV, and a second "inactive" state where the ACC system is not in operation, that is to say that no target vehicle is selected for example.

[0060] In a second operation and as illustrated in [Fig. 3], the activation state of the ACC system is for example displayed in a third zone 203 of the screen 20 and represented in the form of a third graphic object 203. For example, the third graphic object has a graphic representation forming an icon associated with the ACC system. The graphic representation forming the icon is obtained by controlling the values ​​of a color space (for example RGB (from the English “Red, Green, Blue” or in French “Rouge, vert, bleu”) of a set of pixels of the screen 20. associated with the icon.

[0061] In a third operation, second data representative of a value of a parameter for adjusting a target inter-vehicle distance, called target DIV, of the ACC system are received.

[0062] The ACC system has, for example, three values ​​of a distance adjustment parameter. These values ​​are proposed to the driver of the vehicle 10 and represent three inter-vehicle distance setpoint values. These values ​​are, for example, displayed on the screen 20 on board the vehicle 10, for example in a second zone 202, and represented in the form of a second graphic object 212, furthermore having a number of lines or rectangles determined as a function of the value of the adjustment parameter. Thus, the proposed values ​​represent, for example, a distance: - “distant”, represented by 3 lines, - “normal”, represented by 2 lines, and - “close”, represented by 1 line.

[0063] Of course, according to other exemplary embodiments, the number of values ​​of a distance adjustment parameter proposed may be different from three, for example two or five values.

[0064] In a fourth operation, an aerodynamic performance level of the vehicle 10 is determined based on the first and second data.

[0065] The level of aerodynamic performance is linked to the suction phenomenon. The higher the The closer vehicle 10 is to the second vehicle 11, the greater the suction phenomenon. Thus, if vehicle 10 is close to the second vehicle 11, its aerodynamic performance is better than when it is moving away from it.

[0066] Indeed, the second vehicle 11 displaces air when it moves forward, which creates pressure at the front of this second vehicle 11 and requires an energy input in order to move the second vehicle 11 forward. Behind this second vehicle 11, a depression is formed, which is called drag. The vehicle 10, placed behind the second vehicle 11, then benefits from this depression. This depression reduces the air pressure exerted on the front of the vehicle 10, which then needs less energy to move forward. It is therefore advantageous for the vehicle 10 to move closer to the second vehicle 11 to improve its energy performance and consequently reduce its energy consumption.

[0067] When the ACC system is active, the aerodynamic performance level is for example determined as a function of the value of the ACC system adjustment parameter. Thus, according to the example where three values ​​of a distance adjustment parameter are proposed, three aerodynamic performance levels are defined: - an average level for a “far” distance, - a good level for a “normal” distance, and - an excellent level for a “close” distance.

[0068] The “close” distance is notably defined so as to respect the safety distances between vehicles so as not to endanger the occupants of the vehicle 10 and the second vehicle 11.

[0069] Other levels are determined when the number of values ​​of the adjustment parameter is greater than three and the average level is, for example, not defined when the number of values ​​of the adjustment parameter is equal to two.

[0070] The level of aerodynamic performance is determined by selection from the list above based on the setting parameter value selected for the ACC system.

[0071] When the ACC system is inactive, the aerodynamic performance level is not defined, the determined aerodynamic performance level is for example zero.

[0072] In a fifth operation, a display of a graphic object 211 is controlled in a first zone 201 of the screen 20 as a function of the aerodynamic performance level of the vehicle.

[0073] According to a particular exemplary embodiment, the graphic object 211 is displayed when the first data is representative of an active state of the ACC system. Conversely, the graphic object 211 is not displayed when the first data is representative of an inactive state of the ACC system.

[0074] In a sixth operation, the graphical object is selected from a plurality of candidate graphical objects, each candidate graphical object of the plurality being representative of a value of the adjustment parameter selectable from a determined list.

[0075] The number of candidate graphic objects is for example equal to the number of values ​​of the selectable adjustment parameter, a single graphic object being associated with each adjustment parameter value of the ACC system.

[0076] Each candidate graphic object represents, for example, the same shape or the same design, its graphic representation differing by the choice of the color of the pixels composing it.

[0077] Thus, according to an exemplary embodiment, the plurality of graphic objects comprises three candidate graphic objects. The three candidate objects are respectively associated with three aerodynamic performance levels and thus constitute the performance level / pixel color pairs of the graphic representation of the candidate object: - medium level / orange pixels, - good level / light green pixels, and - excellent level / dark green pixels.

[0078] Depending on the color of the graphical representation of the aerodynamic performance level, a driver of the vehicle 10 is able to become aware of the current aerodynamic performance level of the vehicle 10 and adapt the DIV in order to improve the aerodynamic performance of the vehicle 10 and reduce its energy consumption for moving.

[0079] In a seventh operation, third data representative of a current speed of the vehicle 10 are received.

[0080] This data is for example received from an odometer on board the vehicle 10 or from the ACC system.

[0081] In an eighth operation, the speed of the vehicle 10 is compared to a threshold value. The display control is then a function of a result of the comparison.

[0082] Indeed and as described previously, the suction effect is all the more significant as the vehicle moves at a high speed. A threshold value defines for example the speed value of the vehicle 10 from which the suction effect is significant. This threshold value is for example equal to 80, 100 or 120 km / h.

[0083] According to a particular embodiment, the graphic object 211 is not displayed when the speed of the vehicle 10 is lower than the threshold value. The driver of the vehicle 10 then does not receive information relating to the aerodynamic performance of the vehicle 10 because the latter is traveling at a speed at which the suction effect is not significant. At this speed lower than the target value, it is not useful for the driver of the vehicle 10 to search for the ideal distance between the second vehicle 11 and the vehicle 10 optimizing the aerodynamic performance of the vehicle 10.

[0084] [Fig. 4] schematically illustrates a device 4 configured to control a display system of a vehicle, according to a particular and non-limiting exemplary embodiment of the present invention. The device 4 corresponds for example to a device on board the first vehicle 10, for example a computer.

[0085] The device 4 is for example configured for the implementation of the operations described with regard to figures 1 to 3 and / or the steps of the method 5 described with regard to [Fig.5]. Examples of such a device 4 include, but are not limited to, on-board electronic equipment such as an on-board computer of a vehicle, an electronic calculator such as an ECU (“Electronic Control Unit”), a smartphone, a tablet, a laptop. The elements of the device 4, individually or in combination, can be integrated into a single integrated circuit, into several integrated circuits, and / or into discrete components. The device 4 can be produced in the form of electronic circuits or software (or computer) modules or even a combination of electronic circuits and software modules.

[0086] The device 4 comprises one (or more) processor(s) 40 configured to execute instructions for carrying out the steps of the method and / or for executing the instructions of the software(s) embedded in the device 4. The processor 40 may include integrated memory, an input / output interface, and various circuits known to those skilled in the art. The device 4 further comprises at least one memory 41 corresponding for example to a volatile and / or non-volatile memory and / or comprises a memory storage device which may comprise volatile and / or non-volatile memory, such as EEPROM, ROM, PROM, RAM, DRAM, SRAM, flash, magnetic or optical disk.

[0087] The computer code of the embedded software(s) comprising the instructions to be loaded and executed by the processor is for example stored in the 4L memory.

[0088] According to various particular and non-limiting embodiments, the device 4 is coupled in communication with other similar devices or systems and / or with communication devices, for example a TCU (from the English “Telematic Control Unit” or in French “Telematic Control Unit”), for example via a communication bus or through dedicated input / output ports.

[0089] According to a particular and non-limiting exemplary embodiment, the device 4 comprises a block 42 of interface elements for communicating with external devices, for example a remote server or the “cloud”, or the vehicle 10 when the device 4 corresponds to a smartphone or a tablet for example. The interface elements of the block 42 comprise one or more of the following interfaces: - RF radio frequency interface, for example Wi-Fi® type (according to IEEE 802.11), for example in the 2.4 or 5 GHz frequency bands, or Bluetooth® type (according to IEEE 802.15.1), in the 2.4 GHz frequency band, or Sigfox type using UBN (Ultra Narrow Band) radio technology, or LoRa in the 868 MHz frequency band, LTE (LTE) “Long-Term Evolution” or in French “Long-Term Evolution”), LTE-Advanced (or in French LTE-advanced); - USB interface (from the English “Universal Serial Bus” or “Universal Serial Bus” in French); - HDMI interface (from the English “High Definition Multimedia Interface”).

[0090] According to another particular and non-limiting exemplary embodiment, the device 4 comprises a communication interface 43 which makes it possible to establish communication with other devices (such as other computers of the on-board system or on-board sensors) via a communication channel 430. The communication interface 43 corresponds for example to a transmitter configured to transmit and receive information and / or data via the communication channel 430.The communication interface 43 corresponds, for example, to a wired network of the CAN (Controller Area Network), CAN FD (Controller Area Network Flexible Data-Rate), FlexRay (standardized by the ISO 17458 standard), Ethernet (standardized by the ISO / IEC 802-3 standard) or LIN (Local Interconnect Network).

[0091] According to a particular and non-limiting exemplary embodiment, the device 4 can provide output signals to one or more external devices, such as a display screen 20, touch-sensitive or not, and / or other peripherals via respective output interfaces. According to a variant, one or other of the external devices is integrated into the device 4.

[0092] [Fig. 5] illustrates a flowchart of the different steps of a method 5 for controlling a display system of a vehicle, for example of the vehicle 10, according to a particular and non-limiting exemplary embodiment of the present invention. The method 5 is for example implemented by a device on board the vehicle 10 or by the device 4 of [Fig. 4].

[0093] In a first step 51, first data representative of an activation state of the ACC system are received.

[0094] In a second step 52, second data representative of a value of a parameter for adjusting a target inter-vehicle distance of the ACC system are received.

[0095] In a third step 53, an aerodynamic performance level of the vehicle 10 is determined based on the first and second data.

[0096] In a fourth step 54, the display of a graphic object 211 is controlled as a function of the level of aerodynamic performance in a first zone 201 of the screen 20.

[0097] According to a variant, the variants and examples of the operations described in relation to figures 1 to 3 apply to the steps of method 5 of [Fig.5].

[0098] Of course, the present invention is not limited to the exemplary embodiments described above but extends to a method for controlling an IVI system of a vehicle, for example an electric vehicle, which would include secondary steps without thereby departing from the scope of the present invention. The same would apply to a device configured for implementing such a method.

[0099] The present invention also relates to an adaptive cruise control system for a vehicle comprising the device 4 of [Fig.4].

[0100] The present invention also relates to a vehicle, for example a motor vehicle or more generally a land motor vehicle, comprising the device 4 of [Fig.4] or the vehicle display system above.

Claims

Claims

1. Method for controlling a display system of a vehicle (10) incorporating an adaptive cruise control system, called an ACC system, said display system comprising a screen (20), said method comprising the following steps: - receiving (51) first data representative of an activation state of said ACC system; - receiving (52) second data representative of a value of a parameter for adjusting a target inter-vehicle distance of said ACC system; - determining (53) an aerodynamic performance level of the vehicle (10) as a function of said first and second data; - controlling (54) the display of a graphic object (211) as a function of said aerodynamic performance level in a first zone (201) of said screen (20).

2. The method of claim 1, wherein said graphical object (211) is displayed when said first data is representative of an active state of said ACC system and wherein said graphical object (211) is not displayed when said first data is representative of an inactive state of said ACC system.

3. Method according to claim 2, further comprising a step of selecting said graphical object from a plurality of candidate graphical objects, each candidate graphical object of said plurality being representative of a value of said adjustment parameter selectable from a determined list.

4. The method of claim 3, wherein said plurality comprises three candidate graphical objects.

5. Method according to one of claims 1 to 3, which further comprises a step of receiving third data representative of a current speed of said vehicle (10).

6. A method according to claim 4, wherein said vehicle speed (10) is compared to a threshold value, said display control (53) being dependent on a result of said comparison.

7. Method according to claim 5, for which said threshold value is equal to 100km / h.

8. Device (4) for controlling a vehicle aerodynamic performance indication system, said device (4) comprising a memory

9.

10. (41) associated with at least one processor (40) configured for implementing the steps of the method according to any one of claims 1 to 7. Vehicle (10) comprising the device (4) according to claim 8. Vehicle (10) according to claim 9, said vehicle (10) corresponding to an electric vehicle.

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