Method for regulating an air flow in a motor vehicle passenger compartment

Abstract

The invention relates to a method (1) for regulating interior air in a passenger compartment of a motor vehicle by a ventilation and air conditioning system equipped with a movable air intake flap, the regulating method (1) comprising a step (10) of activating a control for cleaning a front windshield of the motor vehicle, a step (11) of determining a humidity level in the passenger compartment, a step (12) of controlling a flow of air blown into the passenger compartment as a function of the determined humidity level and a step (13) of spraying a cleaning liquid onto the front windshield. According to the invention, the controlling step (12) comprises a step (121) of closing the movable flap if the humidity level is lower than a threshold value and / or a step (122) of controlling the ventilation and air conditioning system in order to blow air into the passenger compartment with a predetermined flow rate if the humidity level is lower than a threshold value. Figure to be published with the abstract: Fig.1.

Description

Title of the invention: Method for regulating an air flow in a motor vehicle passenger compartment

[0001] The technical context of the present invention is that of ventilation and air conditioning systems for motor vehicles, and in particular methods for controlling the quality of air blown into a passenger compartment. More particularly, the invention relates to a method for regulating an air flow in a passenger compartment of a motor vehicle.

[0002] In the state of the art, the use of ventilation and air conditioning systems is known for controlling a level of ventilation, temperature and humidity in a motor vehicle passenger compartment. Such ventilation and air conditioning systems have been greatly improved in recent years by incorporating devices for controlling the quality of the air present in the passenger compartment. Such devices include in particular sensors measuring a level of CO2 and / or odor sensors or smoke detectors in order to check that the fresh air injected into the passenger compartment or present in said passenger compartment is not stale.

[0003] In a known manner, such ventilation and air conditioning systems comprise fresh air inlets arranged on a front face of the motor vehicle. Such air inlets make it possible to supply fresh outside air to the ventilation and air conditioning system, before injecting it into the passenger compartment. In a known manner, such fresh air inlets are now sometimes associated with movable flaps which can open or close - at the air inlet itself, in order to control a flow of fresh air entering the ventilation and air conditioning system.

[0004] Systems are also known for wiping a front windshield of a motor vehicle, making it possible to scrape the surface of the windshield with a wiping blade driven by a translational and / or rotational movement. Such wiping systems are associated with cleaning devices which propel a cleaning liquid onto the windshield in order to make it possible, in combination with the wiping system, to clean the windshield and remove all dirt therefrom.

[0005] However, recent studies have shown that the products used in cleaning liquids represent a significant source of polluting emissions, and that they contain, in particular, large quantities of volatile organic compounds. Thus, when cleaning the windshield, these volatile organic compounds penetrate into the passenger compartment via the ventilation and air conditioning system, leading its occupants to inhale products that are harmful to their health.

[0006] The object of the present invention is to propose a new regulation method of interior air to a passenger compartment of a motor vehicle, in order to address at least largely the preceding problems and to further lead to other advantages.

[0007] Another aim of the invention is to improve the quality of the interior air in the passenger compartment of a motor vehicle.

[0008] According to a first aspect of the invention, at least one of the aforementioned objectives is achieved with a method for regulating the air inside a passenger compartment of a motor vehicle by a ventilation and air conditioning system equipped with a movable air intake flap, the regulation method comprising the following steps:

[0009] - a step of activating a control for cleaning a front windshield of the motor vehicle;

[0010] - a step of determining a humidity level in the passenger compartment;

[0011] - a step of controlling a flow of air blown into the passenger compartment as a function of the rate determined humidity;

[0012] - a step of spraying a cleaning liquid onto the front windshield.

[0013] More generally, the invention relates to a method for regulating a closing flap - called a movable flap - of a ventilation duct of the ventilation and air conditioning system and opening into the passenger compartment of the motor vehicle, the regulation method comprising the aforementioned steps.

[0014] In the context of the present invention, the air intake may be an air intake placed on the front of the motor vehicle, or an air intake placed on any front part of the motor vehicle, at any bodywork element. The air intake is thus an external fresh air intake. Alternatively, in the context of the present invention, the air intake may also be an air intake into the passenger compartment of the motor vehicle, i.e. an air vent for said passenger compartment. The air intake may be located downstream of the fluid duct or the fluid duct may be located downstream of the air intake, relative to a direction of air flow in the fluid duct.

[0015] In the context of the present invention, the movable flap is a movable part collaborating with the air inlet in order to be able to control an air flow circulating in the fluid conduit through said air inlet. The movable flap can thus be configured in any configuration between an open configuration in which the air flow circulating in the associated fluid conduit is maximum and a closed configuration in which the air flow is minimal or even zero. The movable flap is mounted movable by any means. By way of non-limiting example, the movable flap is of the type of a pivoting flap or a folding flap.

[0016] In the context of the present invention, the movable shutter is motorized or manual, that is to say that it can respectively pass from its open configuration to its closed confi closed structure - or vice versa - in a motorized manner by an electric or hydraulic actuator or manually by the intervention of a user of the ventilation and air conditioning system.

[0017] In the context of the present invention, the activation step corresponds to the selection by the user or the automatic activation by a control unit of the motor vehicle, to operate the cleaning function of the front windshield of the motor vehicle. The activation step does not correspond to the implementation of the front windshield cleaning device, but only to the instruction given to said device to be triggered imminently.

[0018] In the context of the present invention, the step of determining the humidity level in the passenger compartment may comprise a step of measuring the humidity level or a step of reading a variable available on an on-board network and representative of the humidity level of the passenger compartment. By way of non-limiting example, the humidity level may in particular be determined by quantifying the difference between a dew point temperature and a temperature measured at the windshield. The threshold value is a predetermined value and recorded in a memory available for implementing the regulation method according to the invention. For example, if the humidity level is determined by quantifying the difference between the dew point temperature and the temperature measured at the windshield, then the threshold value is for example equal to 0°.

[0019] Depending on the determined humidity level, several strategies for controlling the mobile shutter are considered and will be described in the following paragraphs.

[0020] In the context of the present invention, the step of projecting the cleaning liquid onto the front windshield corresponds to the implementation of the cleaning device. Typically, the projection step comprises a step of controlling a pump making it possible to take cleaning liquid from a cleaning liquid reservoir and transport it to projection nozzles located opposite the front windshield or associated with the wiping system of said front windshield. Of course, the step of projecting the cleaning liquid is preferably accompanied by a step of triggering at least one wiper blade associated with the front windshield.

[0021] The regulation method according to the first aspect of the invention is implemented by a control unit comprising a microcontroller and / or a printed circuit and / or a microprocessor. Additionally, the control unit also optionally comprises a memory.

[0022] Thus, the regulation method according to the first aspect of the invention solves the technical problem in that it makes it possible to reduce the penetration of volatile organic compounds contained in the cleaning liquid when cleaning the front windshield.

[0023] The regulation method according to the first aspect of the invention advantageously comprises at least one of the improvements below, the technical characteristics forming these improvements being able to be taken alone or in combination:

[0024] - in order to better adapt the closing time of the mobile shutter, the step of determining mination of the humidity rate includes a step of measuring humidity in a water box located at the foot of the windshield. Consequently, the control step is configured according to the humidity measured in the water box. For example, the step of closing the movable shutter is maintained as long as the humidity measured in the water box is higher than a reference threshold;

[0025] - according to a first embodiment of the invention, the control step comprises a step of closing the movable flap if the humidity level is below a threshold value. In the context of the present invention, the step of closing the movable flap is inserted precisely between the activation step and the implementation of the cleaning device. The closing step thus makes it possible to isolate the passenger compartment of the motor vehicle from the outside air, and thus to prevent the latter, which will be loaded with volatile organic compounds during the next implementation of the cleaning device, from these latter volatile organic compounds entering said passenger compartment. Thus, during the step of closing the movable flap, the flow of air entering the passenger compartment is controlled so as to be zero or minimal. In other words, the step of closing the movable flap leads for example to activating a mode of recycling the ambient air to the passenger compartment of the motor vehicle.Consequently, in this first embodiment, the invention aims to isolate the passenger compartment as much as possible from the external environment, considering that the latter is then too polluted with volatile organic compounds when the cleaning liquid is sprayed onto the windshield;

[0026] - according to a second embodiment of the invention, alternative or complementary of the first embodiment of the invention, the control step comprises a step of controlling the ventilation and air conditioning system in order to blow air into the passenger compartment with a predetermined flow rate if the humidity level is higher than a threshold value. In the context of the present invention, the step of controlling the ventilation and air conditioning system makes it possible to control a flow rate of the air flow blown into the passenger compartment, possibly, the control step also makes it possible to control a temperature and a humidity of the air flow blown into the passenger compartment. Thus, during the step of controlling the ventilation and air conditioning system, the air flow entering the passenger compartment is controlled so as to be non-zero, or even maximum. In other words, the step of controlling the ventilation and air conditioning system leads for example to activating ventilation in the passenger compartment of the motor vehicle.Therefore, in this second embodiment, the invention aims to renew as quickly as possible. possible the air inside the passenger compartment in order to circulate as quickly as possible and to the outside environment the volatile organic compounds which could have been introduced when the cleaning liquid was sprayed on the windshield;

[0027] - the step of controlling the ventilation and air conditioning system is carried out if the humidity level determined during the determination step is greater than a reference value, for example equal to 90%;

[0028] - the flow of air blown into the passenger compartment during the control stage of the ventilation system The regulation process for the ventilation and air conditioning system depends on the speed of movement of the motor vehicle, the speed of movement being determined at the time of triggering the regulation process or during any of its steps. In particular, if the speed of movement is lower than a first speed threshold, then the blown air flow rate is lower than a reference flow rate level. The first speed threshold is for example equal to 15 km / h and the reference flow rate level is for example equal to 50% of a maximum flow rate. Indeed, in this case, the low speed of movement of the motor vehicle leads to relatively few volatile organic particles being introduced into the passenger compartment by the ventilation and air conditioning system, and in particular through the movable flap. Consequently, it is not necessary for the flow rate to be very high.On the other hand, if the movement speed is greater than the first speed threshold, then the blown air flow rate is greater than the reference flow rate level. In particular, if the movement speed is greater than the first speed threshold, then the blown air flow rate is equal to the maximum flow rate; .

[0029] - the projection step is initiated as soon as the control step is triggered, that is to say as soon as the closing step of the movable shutter is triggered or as soon as the control step of the ventilation and air conditioning system is triggered. Alternatively, the regulation method comprises a time delay step located between the control step and the projection step, the projection step being initiated as soon as the time delay step ends. This advantageous configuration makes it possible, when the control step includes the closing step of the movable shutter, to allow time for the movable shutter to close completely and to ensure that the air in the passenger compartment then circulates in a closed circuit, that is to say in recycling mode.Alternatively or additionally, this advantageous configuration makes it possible, when the control step includes the step of controlling the ventilation and air conditioning system, to renew the air inside the passenger compartment as quickly as possible by circulating the air from the outside to the inside using the ventilation and air conditioning system. In this case, the delay step lasts for a predetermined duration, for example equal to 1 second; .

[0030] - according to a first embodiment, the control step is carried out during a predetermined duration. In particular, the step of closing the movable shutter is carried out for a predetermined duration and / or the step of controlling the ventilation and air conditioning system is carried out for a predetermined duration. The predetermined duration here corresponds to the duration during which the movable shutter remains in its closed configuration and / or the duration during which the ventilation and air conditioning system is activated to blow air into the passenger compartment.When the control step includes the step of closing the movable flap, this advantageous configuration makes it possible to force the air present in the passenger compartment to be recycled there and to prevent polluted outside air, because it is loaded with volatile organic compounds present in the cleaning liquid currently used for cleaning the windshield, from being injected into the passenger compartment. On the other hand, when the control step includes the step of controlling the ventilation and air conditioning system, this advantageous configuration makes it possible to renew the air inside the passenger compartment as quickly as possible by circulating the air from the outside to the inside thanks to the ventilation and air conditioning system. In this first embodiment, the duration of closure of the movable flap and / or the duration of operation of the ventilation and air conditioning system is determined blindly, that is to say independently of the operation of the cleaning device itself.Thus, the closing time and / or the operating time is defined by a factory setting for the sake of simplification. The predetermined closing time of the movable shutter and / or the predetermined operating time of the ventilation and air conditioning system is for example equal to 10 seconds; .

[0031] - alternatively, according to a second embodiment, the predetermined duration of the control step depends on a travel speed of the motor vehicle, the travel speed being determined at the time of triggering the regulation method or during any of its steps. In this second embodiment, the duration of closure of the movable shutter varies according to the travel speed of the motor vehicle and / or the duration of operation of the ventilation and air conditioning system varies according to the travel speed of the motor vehicle. Indeed, if the motor vehicle is moving at low speed, then the penetration of volatile organic compounds into the passenger compartment via the air intake of the motor vehicle is less significant, and it is therefore not necessary to close the movable shutter for a very long time. On the other hand, if the motor vehicle is moving at low speed, then it is necessary to operate the ventilation and air conditioning system for a longer time and / or more strongly.Thus, if the speed of movement is lower than a first speed threshold, then the predetermined duration of closing of the movable shutter and / or of controlling the ventilation and air conditioning system is equal to a first control duration. The first speed threshold is for example equal to 15 km / h and the first control duration is for example equal to at least 10 seconds in the . case of closing the mobile shutter and at least 30 seconds in the case of controlling the ventilation and air conditioning system;

[0032] - on the other hand, if the motor vehicle moves at a higher speed, then the pe netration of volatile organic compounds into the passenger compartment via the air intake of the motor vehicle is greater, and it is therefore necessary to close the movable shutter for a little longer. On the other hand, if the motor vehicle is moving at a higher speed, then it is necessary to operate the ventilation and air conditioning system for a longer time and / or more strongly. Thus, if the travel speed is higher than a first speed threshold, then the predetermined duration of closing the movable shutter and / or of controlling the ventilation and air conditioning system is equal to a first control duration. Thus, if the travel speed is higher than the first speed threshold, then the predetermined control duration is equal to a second closing duration greater than the first closing duration in the case of closing the movable shutter.If the control step takes the form of the step of controlling the ventilation and air conditioning system, then the predetermined control duration is equal to a second closing duration less than the first closing duration. In particular, if the movement speed is greater than the first speed threshold, then the second control duration is for example equal to at least 30 seconds in the case of closing the movable shutter and at least 10 seconds in the case of controlling the ventilation and air conditioning system; .

[0033] - of course, the presence of volatile organic compounds present at the level of the front windshield and / or the air intake of the motor vehicle is a little longer than the simple implementation of the cleaning device or the wiping system, since said volatile organic compounds can for example run off an edge of the windshield or fall into a water box present at the foot of said windshield. In this case, it is advantageous for the control step - that is to say the step of closing the movable shutter and / or the step of controlling the ventilation and air conditioning system - to extend beyond the projection step, for a predetermined duration - called post-wash duration, for example equal to 5 seconds. In this configuration, the post-wash duration is determined by a factory setting for the sake of simplification;

[0034] - alternatively, the post-wash duration depends on a movement speed of the motor vehicle, the travel speed being determined at the time of triggering the regulation method or during any of its steps. For example, if the travel speed is lower than a first speed threshold, then the post-wash duration is equal to a first post-wash duration. The first speed threshold is for example equal to 15 km / h and the first post-wash duration is for example equal to at least 2 seconds in the case where the control step includes the step of closing the movable shutter. Indeed, if the motor vehicle is moving at low speed, then the penetration of volatile organic compounds into the passenger compartment via the air intake of the motor vehicle is less significant, and it is therefore not necessary to close the movable shutter for a very long time after using the cleaning device and the wiping system. On the other hand, in the case where the control step includes the step of controlling the ventilation and air conditioning system, then the first speed threshold is for example equal to 15 km / h and the first post-washing time is for example equal to at least 4 seconds. Indeed, if the motor vehicle is moving at low speed, then the renewal of the air in the passenger compartment is less significant, and it is therefore necessary to circulate fresh air for longer to evacuate all the volatile organic compounds which could have entered the passenger compartment during the use of the cleaning device and the wiping system;

[0035] - on the other hand, if the movement speed is greater than the first speed threshold, then the post-washing duration is equal to a second post-washing duration. The second post-washing duration is greater than the first post-washing duration if the control step includes the step of closing the movable flap, and the second post-washing duration is less than the first post-washing duration if the control step includes the step of controlling the ventilation and air conditioning system. Indeed, if the motor vehicle is moving at a higher speed, then the penetration of volatile organic compounds into the passenger compartment via the air intake of the motor vehicle is greater, and it is therefore necessary to close the movable flap for a longer time after using the cleaning device and the wiping system in the case where the control step includes the step of closing the movable flap.In this case, in particular, if the travel speed is greater than the first speed threshold, then the second post-washing time is for example equal to at least 4 seconds. On the other hand, in the case where the control step includes the step of controlling the ventilation and air conditioning system, then the second post-washing time is for example equal to at least 2 seconds. Indeed, if the motor vehicle is moving at a higher speed, then the renewal of the air in the passenger compartment is greater, and it is therefore possible to circulate fresh air for a shorter time to evacuate all the volatile organic compounds which could have entered the passenger compartment during the use of the cleaning device and the wiping system; .

[0036] According to a second aspect of the invention, there is provided an arrangement for a motor vehicle, the arrangement comprising:

[0037] - a ventilation and air conditioning system for a motor vehicle passenger compartment, the ventilation and air conditioning system comprising a set of fluid conduits opening at the passenger compartment, and at least one movable flap which can be configured between an open configuration in which an air flow is introduced through said movable flap into the fluid conduits and a closed configuration in which outside air cannot enter the fluid conduits;

[0038] - a system for wiping a front windshield of a motor vehicle;

[0039] - a device for spraying a cleaning liquid onto the front windshield;

[0040] - a control unit configured to implement the regulation method in accordance with the first aspect of the invention or according to any of its improvements.

[0041] In the context of the present invention, the wiping system comprises at least one wiper blade associated with the front windshield, the wiper blade comprising a scraping blade pressed against the windshield and making it possible to scrape the dirt present on its surface. The wiper blade is driven by a rotational and / or translational movement by means of an actuator coupled to the wiper blade.

[0042] In the context of the present invention, the projection device comprises one or more projection nozzles associated with the front windshield. The projection nozzles are located opposite the front windshield so as to be able to directly project the cleaning liquid onto said front windshield, or the projection nozzles are associated with the windshield wiper blade in order to diffuse the cleaning liquid directly at the level of the scraper blade during its back and forth movement on the front windshield, the projection device comprises a reserve of cleaning liquid housed in a reservoir, and a pump configured to generate a flow of cleaning liquid through distribution conduits extending between said reservoir and the projection nozzles.

[0043] In the context of the present invention, the control unit comprises a microcontroller and / or a printed circuit and / or a microprocessor. Additionally, the control unit also optionally comprises a memory.

[0044] According to a third aspect of the invention, there is provided a motor vehicle comprising an arrangement in accordance with the second aspect of the invention.

[0045] Various embodiments of the invention are provided, integrating according to all of their possible combinations the different optional characteristics set out here.

[0046] Other characteristics and advantages of the invention will become apparent from the following description on the one hand, and from several examples of embodiment given for informational and non-limiting purposes with reference to the appended schematic drawings on the other hand, in which:

[0047] [Fig. 1] illustrates a synoptic view of the regulation method according to the first aspect of the invention;

[0048] [Fig.2] illustrates a schematic view of an arrangement according to the second aspect of the invention.

[0049] Of course, the characteristics, variants and different forms of rea The invention may be combined with each other in various combinations, provided that they are not incompatible or mutually exclusive. In particular, variants of the invention may be imagined comprising only a selection of features described below in isolation from the other features described, if this selection of features is sufficient to confer a technical advantage or to differentiate the invention from the prior art.

[0050] In particular, all the variants and all the embodiments described can be combined with each other if nothing prevents this combination from a technical point of view.

[0051] In the figures, the elements common to several figures retain the same reference.

[0052] With reference to [Fig.l], the invention addresses a method 1 for regulating interior air in a passenger compartment of a motor vehicle 3 by a ventilation and air conditioning system 31 equipped with a movable air intake flap 32, the regulation method 1 comprising the following steps:

[0053] - a step 10 of activating a control for cleaning a front windshield 34 of the motor vehicle 3;

[0054] - a step 11 of determining a humidity level in the passenger compartment. In particular, the step 11 of determining the humidity level comprises a step 15 of measuring humidity in a water box located at the foot of the windshield 34;

[0055] - a step 12 of controlling an air flow F blown into the passenger compartment as a function of the determined humidity level;

[0056] - a step 13 of spraying a cleaning liquid onto the front windshield 34.

[0057] —The regulation method 1 makes it possible to control the air flow F in the passenger compartment by function of two alternative or complementary embodiments of each other:

[0058] - according to a first embodiment, the control step 12 comprises a step of closing 121 of the movable flap 32 if the humidity level is lower than a threshold value. In this variant embodiment, the regulation method 1 thus controls the opening and closing of a closing flap - called movable flap 32 - of a ventilation duct of the ventilation and air conditioning system 31 and opening into the passenger compartment of the motor vehicle 3. The movable flap 32 is a movable part collaborating with the air inlet in order to be able to control an air flow F circulating in the fluid duct 35 through said air inlet. The movable flap 32 can thus be configured in any configuration between an open configuration in which the air flow F circulating in the associated fluid duct 35 is maximum and a closed configuration in which the air flow F is minimal or even zero. The movable flap 32 is mounted movable by any means.By way of non-limiting example, the movable shutter 32 is of the type of a pivoting shutter or a folding shutter.

[0059] The movable flap 32 is associated with an air inlet into the passenger compartment. In the embodiment illustrated schematically in [Fig.l], the flap is associated with a front face of the motor vehicle 3, so that the air inlet is here the air inlet of the ventilation and air conditioning system 31. However, the invention addresses the air inlet in a more general manner as being the air inlet into the passenger compartment of the motor vehicle 3, so that the movable flap 32 can quite easily be located not at the front face, but at, for example, a ventilation grille in the passenger compartment. Thus, the air inlet associated with the movable flap 32 can be located downstream of the fluid conduit 35 or the fluid conduit 35 can be located downstream of the air inlet, relative to a direction of flow of the air flow F in the fluid conduit 35.

[0060] - according to a second embodiment, the control step 12 comprises a step control 122 of the ventilation and air conditioning system 31 in order to blow air into the passenger compartment with a predetermined flow rate. The ventilation and air conditioning system 31 makes it possible to control a flow rate of air blown into the passenger compartment, the air being captured from the outside by air inlets fluidically coupled - via fluid conduits 35 - to the ventilation and air conditioning system 31 and to the passenger compartment, by means of the movable flap 32. The ventilation and air conditioning system 31 thus makes it possible to control a flow rate blown into the passenger compartment, a temperature of the blown air and a humidity of the blown air.

[0061] By way of example, the control step 122 of the ventilation and air conditioning system 31 is carried out if the humidity level determined during the determination step 11 is greater than a reference value, for example equal to 90%.

[0062] The projection step 13 can be initiated as soon as the control step 12 is triggered, that is to say as soon as the control step 122 of the ventilation and air conditioning system 31 is triggered for example.

[0063] Alternatively, the regulation method 1 may comprise a timing step 14 located between the control step 12 and the projection step 13, the projection step 13 being initiated as soon as the timing step 14 ends. In this case, the timing step 14 makes it possible, for example, to allow the necessary time for the movable flap 32 to close, during the first moments of the closing step 121, in order to guarantee that the air in the passenger compartment then circulates in recycling mode.

[0064] In this case, the timing step 14 lasts for a predetermined duration, for example equal to 1 second.

[0065] In a particularly advantageous manner, the parameters of the control step 12 may depend on certain variables of the motor vehicle 3, and in particular on its speed of movement. Indeed, depending on its speed of movement, the volatile organic compounds contained in the cleaning liquid and projected into the outside air near the passenger compartment penetrate more or less quickly and more or less less massively in the passenger compartment. Also, several strategies can be implemented in the context of the invention, including in particular:

[0066] - either close the movable shutter 32 for a longer or shorter time depending on the speed of the motor vehicle 3 in order to prevent volatile organic compounds from entering the passenger compartment.

[0067] - either renew the ambient air in the passenger compartment more or less quickly in order to evacuate any volatile organic compounds that may have entered it.

[0068] Of course, the combination of these two strategies is perfectly conceivable in the context of the present invention, that is to say, to renew the ambient air after first seeking to prevent volatile organic compounds from entering the passenger compartment.

[0069] The parameters for implementing the regulation method 1 will now be described independently of the two embodiments mentioned above, it being understood that these two embodiments can be combined in the context of the present invention.

[0070] First of all, the duration during which the movable flap 32 is closed or during which the air is blown into the passenger compartment in order to be renewed can be variable. According to a simplest embodiment, this duration of the control step 12, that is to say the duration of the closing step 121 or the duration of the piloting step 122, can be predetermined arbitrarily and statically, that is to say invariantly. For example, the duration during which the movable flap 32 is closed or during which the ventilation and air conditioning system 31 is piloted to blow fresh air into the passenger compartment can be equal to 10 seconds.

[0071] Alternatively, this duration may depend on the speed of movement of the motor vehicle 3.

[0072] In the case where the control step 12 includes the step 121 of closing the movable flap 32, if the motor vehicle 3 is moving at low speed, for example less than 15 km / h, then the penetration of the volatile organic compounds into the passenger compartment via the air intake of the motor vehicle 3 is less significant, and it is therefore not necessary to close the movable flap 32 for a very long time, for example at least 10 seconds. On the other hand, if the motor vehicle 3 is moving at a higher speed, for example more than 15 km / h, then the penetration of the volatile organic compounds into the passenger compartment via the air intake of the motor vehicle 3 is greater, and it is therefore necessary to close the movable flap 32 for a little longer, for example at least 30 seconds.

[0073] In the case where the control step 12 includes the control step 122 of the ventilation and air conditioning system 31, if the motor vehicle 3 is moving at low speed, for example less than 15 km / h, then it is necessary to operate the system ventilation and air conditioning system 31 for a longer time, for example at least 30 seconds. On the other hand, if the motor vehicle 3 is moving at a higher speed, for example more than 15 km / h, then it is sufficient to activate the ventilation and air conditioning system 31 for at least 10 seconds for example.

[0074] Following the step 13 of spraying the cleaning liquid onto the windshield 34, it may be useful to extend the control step 12 for a few additional moments to improve the quality of the air inside the passenger compartment as quickly and efficiently as possible.

[0075] In a similar manner to the duration of the control step 12 as a function of the speed of the motor vehicle 3, the duration beyond the projection of the cleaning liquid and during which the control step 12 is kept active can be determined in several ways.

[0076] First of all, the duration during which the movable flap 32 is closed or during which the air is blown into the passenger compartment beyond the projection step 13 can be determined, in the simplest manner, in a predetermined manner, that is to say invariant. For example, the duration during which the movable flap 32 is closed or during which the ventilation and air conditioning system 31 is controlled after the end of the projection step 13 can be equal to 4 seconds.

[0077] Alternatively, this duration may depend on the speed of movement of the motor vehicle 3.

[0078] In the case where the control step 12 includes the step 121 of closing the movable flap 32, if the motor vehicle 3 is moving at low speed, for example less than 15 km / h, then the penetration of the volatile organic compounds into the passenger compartment via the air intake of the motor vehicle 3 is less significant, and it is therefore not necessary to close the movable flap 32 for a very long time after the end of the projection step 13, for example at least 2 seconds. On the other hand, if the motor vehicle 3 is moving at a higher speed, for example more than 15 km / h, then the penetration of the volatile organic compounds into the passenger compartment via the air intake of the motor vehicle 3 is greater, and it is therefore necessary to close the movable flap 32 for a little longer after the end of the projection step 13, for example at least 4 seconds.

[0079] In the case where the control step 12 includes the step 122 of piloting the ventilation and air conditioning system 31, if the motor vehicle 3 is moving at low speed, for example less than 15 km / h, then it is necessary to operate the ventilation and air conditioning system 31 for a longer time after the projection step 13, for example at least 4 seconds. On the other hand, if the motor vehicle 3 is moving at a higher speed, for example more than 15 km / h, then it is sufficient to activate the ventilation and air conditioning system 31 for at least 2 seconds, for example after projection step 13.

[0080] Finally, in the case where the control step 12 comprises the control step 122 of the ventilation and air conditioning system 31, then if the movement speed is lower than a first speed threshold, then the blown air flow rate is lower than a reference flow rate level. On the other hand, if the movement speed is higher than the first speed threshold, then the blown air flow rate is higher than the reference flow rate level. The first speed threshold is for example equal to 15 km / h and the reference flow rate level is for example equal to 50% of a maximum flow rate.

[0081] With reference to [Fig.2], the invention relates to a motor vehicle 3 comprising an arrangement 2 configured to implement the regulation method 1 as described previously. In particular, the arrangement 2 comprises:

[0082] - the ventilation and air conditioning system 31 of the vehicle passenger compartment at car 3, the ventilation and air conditioning system 31 comprising a set of fluid conduits 35 opening at the passenger compartment, and at least one movable flap 32 which can be configured between an open configuration in which an air flow F circulates towards the passenger compartment through said movable flap 32 and via the fluid conduits 35 and a closed configuration in which outside air cannot enter the passenger compartment;

[0083] - a wiping system 33 for a windshield 34 in front of the motor vehicle 3. The wiping system 33 comprises at least one wiper blade associated with the front windshield 34, the wiper blade comprising a scraping blade pressed against the windshield 34 and making it possible to scrape the dirt present on its surface. The wiper blade is driven by a rotational and / or translational movement by means of an actuator coupled to the wiper blade;

[0084] - a device for spraying a cleaning liquid onto the front windshield 34. The projection device comprises one or more projection nozzles associated with the front windshield 34 and making it possible to project the cleaning liquid directly onto said front windshield 34;

[0085] - a control unit configured to implement the regulation method 1 such as described previously.

[0086] In summary, the invention relates to a method 1 for regulating interior air in a passenger compartment of a motor vehicle 3 by a ventilation and air conditioning system 31 equipped with a movable air intake flap 32, the method 1 for regulating comprising a step 10 of activating a control for cleaning a front windshield 34 of the motor vehicle 3, a step 11 of determining a humidity level in the passenger compartment, a step 12 of controlling an air flow F blown into the passenger compartment as a function of the determined humidity level and a step 13 of spraying a cleaning liquid onto the front windshield 34. According to the invention, the control step 12 comprises a step 121 of closing the movable shutter 32 if the humidity level is lower than a threshold value and / or a step 122 of controlling the ventilation and air conditioning system 31 in order to blow air into the passenger compartment with a predetermined flow rate if the humidity level is lower than a threshold value.

[0087] Of course, the invention is not limited to the examples which have just been described and numerous adjustments can be made to these examples without departing from the scope of the invention. In particular, the different characteristics, forms, variants and embodiments of the invention can be associated with each other in various combinations insofar as they are not incompatible or mutually exclusive. In particular, all the variants and embodiments described above can be combined with each other.

Claims

Claims

1. Method for regulating (1) an interior air in a passenger compartment of a motor vehicle (3) by a ventilation and air conditioning system (31) equipped with a movable air intake flap (32), the regulating method (1) comprising the following steps: - a step of activating (10) a control for cleaning a front windshield (34) of the motor vehicle (3); - a step of determining (11) a humidity level in the passenger compartment; - a step of controlling (12) an air flow (F) blown into the passenger compartment as a function of the determined humidity level; - a step of projecting (13) a cleaning liquid onto the front windshield (34).

2. Regulation method (1) according to the preceding claim, in which the control step (12) comprises a step of closing (121) the movable shutter (32) if the humidity level is lower than a threshold value.

3. Regulation method (1) according to any one of the preceding claims, in which the control step (12) comprises a step of controlling (122) the ventilation and air conditioning system (31) in order to blow air into the passenger compartment with a predetermined flow rate if the humidity level is greater than a threshold value.

4. Regulation method (1) according to any one of the preceding claims, in which the regulation method (1) comprises a timing step (14) located between the control step (12) and the projection step (13), the projection step (13) being initiated as soon as the timing step (14) ends.

5. Regulation method (1) according to any one of the preceding claims, in which the control step (12) is carried out for a predetermined duration, the predetermined duration depending on a speed of movement of the motor vehicle (3) determined at the time of triggering of the regulation method (1) or during any one of its steps.

6. Regulation method (1) according to any one of the preceding claims, in which the control step (12) extends beyond the projection step (13), for a predetermined duration - called post-wash duration which depends on a speed of movement of the motor vehicle (3) determined at the time of triggering of the regulation method (1) or during any one of its steps.

7. Regulation method (1) according to any one of the preceding claims taken in combination with claim 2, in which the determining step (11) comprises a step of measuring (15) humidity in a water box located at the foot of the windshield (34), the step of closing (121) the movable shutter (32) being maintained as long as the humidity measured in the water box is greater than a reference threshold.

8. Regulation method (1) according to any one of the preceding claims taken in combination with claim 3, in which the step of controlling (122) the ventilation and air conditioning system (31) is carried out if the humidity level determined during the determination step (11) is greater than a reference value, for example equal to 90%.

9. Arrangement (2) for a motor vehicle (3), the arrangement (2) comprising: - a ventilation and air conditioning system (31) for a passenger compartment of a motor vehicle (3), the ventilation and air conditioning system (31) comprising a set of fluid conduits (35) opening at the passenger compartment, and at least one movable flap (32) which can be configured between an open configuration in which an air flow (F) is introduced through said movable flap (32) into the fluid conduits (35) and a closed configuration in which outside air cannot enter the fluid conduits (35); - a wiping system (33) for a front windshield (34) of the motor vehicle (3); - a device for spraying a cleaning liquid onto the front windshield (34); - a control unit configured to implement the regulation method (1) according to any one of the preceding claims.

10. Motor vehicle (3) comprising an arrangement (2) according to the preceding claim.

Images