FR3056000B1 - METHOD FOR MONITORING POLLUTING EMISSIONS OF A MOTOR VEHICLE, WITH RESTITUTION ON A MOBILE DEVICE - Google Patents

Abstract

A method for monitoring the emissions of an automobile vehicle (1), which comprises the following operations: - measuring in real time the driving parameters of the vehicle (1); - Take into account a vehicle emissions map (1) corresponding to the identifier, stored on a database (6) in communication with the remote server (5); from this map and the measured driving parameters, estimate the emissions of the vehicle (1); from this estimate, elaborate information (11) characteristic of it; transmitting this information (11) to a mobile device (8) provided with a user interface (9); - Restore this information (11) on the user interface (9) of the device (8) mobile.

Description

The invention relates to the field of the automobile, and more particularly to the control of polluting emissions of motor vehicles.

The anti-pollution standards to which the new engines - and by extension the vehicles equipped with them - have to comply, are always stricter. In parallel, the company is putting pressure on motorists to adapt their driving to limit the polluting emissions of their vehicle.

However most motorists are neither trained nor trained to optimize their driving in this direction. In fact, it is not enough to limit the speed of movement of the vehicle. Often, the engine is overspeeded even though the vehicle speed remains moderate. Similarly, the engine speed may be low while the engine load (that is to say the ratio of the power demand on the maximum available power) is high.

Vehicle studies have shown that emissions are based on many factors, cf. eg. Yang et al., "Evaluating Real-world CO2 and NOX Emissions for Public Transit Tips Using a Remote Wireless On-Board Diagnosis (OBD) Approach," About Pollut, July 18, 2016.

It is therefore understandable that relying solely on motorists to obtain reductions in pollutant emissions is not enough, and that a solution implementing automation is necessary.

A first object of the invention is therefore to allow a reduction of polluting emissions when driving motor vehicles.

A second objective is to propose a solution implementing automation to allow a motorist to properly adapt his driving based on relevant information provided to him in relation to the state of the vehicle in real time. For this purpose, there is provided a method for controlling the emissions of a motor vehicle, which comprises the following operations: measuring in real time the driving parameters of the vehicle; take into account a vehicle identifier and a vehicle emission map corresponding to the identifier, stored on a database in communication with the remote server; based on this map and the measured driving parameters, estimate the vehicle emissions; from this estimate, elaborate a characteristic information of this one; return this information to the user interface of the mobile device.

This characteristic information may be the estimate itself, or a data item such as a digit included eg. between 1 and 5 and designating the corresponding area of the map in which the estimated emission is located.

In this way, the driver is automatically informed of the polluting emissions of his vehicle and is thus encouraged to adapt his driving mode, without being deprived of his driving choices.

The driving parameters can be selected from the following list: engine speed, engine load, throttle position, gear ratio, vehicle speed.

The vehicle identification data may include one or more items selected from the following list: vehicle identification number, manufacturer's name, vehicle make, vehicle type, vehicle engine, date of manufacture of the vehicle.

It can be provided, when the vehicle emissions exceed a predetermined threshold, an operation of generating an alert and an operation of restitution of this alert on the user interface of the mobile device. The alert includes, for example, a recommendation to change the driving mode.

All or part of the treatment can be done remotely. For this purpose, the method may comprise an operation of transmission of the driving parameters to a remote server, in communication with a database on which the map is stored.

In this case, the emission estimates of the information processing vehicle are advantageously performed by the server.

The method may include an operation of transmitting the information to the mobile device for playback.

As a variant, the treatment is wholly or partly carried out locally. For this purpose, the vehicle emission estimation and information development operations are performed by the mobile device. Other objects and advantages of the invention will become apparent in the light of the description of an embodiment, given below with reference to the appended drawings in which: FIG. 1 is a diagram illustrating a network architecture allowing to put implementing a method for controlling the emissions of a motor vehicle, as well as a first solution for displaying relevant data or recommendations for a motorist; FIG. 2 is a diagram partially illustrating the network architecture of FIG. 1, and showing a transmission map of a vehicle; FIG. 3 is a diagram showing a second solution for displaying relevant data or recommendations for a motorist.

FIG. 1 shows a network architecture intended to allow the control of the pollutant emissions of a motor vehicle 1. As illustrated, this vehicle 1 may be a private vehicle, a two-wheeled vehicle (such as a motorcycle), or a commercial vehicle (eg a truck).

Conventionally, the vehicle 1 comprises a chassis, running gear including a power train (eg the rear axle) and an internal combustion engine.

According to a first embodiment, the engine operates by compression ignition (diesel fuel), e.g. for a utility vehicle or a particular vehicle as illustrated in FIG. In this case, it is the nitrogen oxides (NOx) and the particles that constitute the bulk of the polluting emissions to be monitored.

According to a second embodiment, the engine operates by controlled ignition (petrol fuel), e.g. for a particular vehicle or for a motorcycle as illustrated in FIG. In this case carbon monoxide (CO) and unburned hydrocarbons (HC) constitute the bulk of the polluting emissions to be monitored.

The vehicle 1 is further equipped with an on-board diagnostics device 2 (OBD) connected to sensors 3 arranged here and there in the vehicle 1 to measure various driving parameters.

Thus, the vehicle 1 can be equipped with sensors 3 connected to the OBD to determine (directly or indirectly, by calculation) in particular the following parameters, and in real time: in the engine: o the engine load (this is ie the ratio of the requested power to the total available power) o the speed of rotation of the motor in the running gear, the speed of the vehicle 1. Other parameters can be determined, in particular: in the box speed, the engaged ratio; on the accelerator of the vehicle 1, the position thereof. The OBD 2 integrates or is connected to a memory in which is stored a Vehicle Identification Number (VIN), commonly called a serial number. This number, which is in the form of an alphanumeric code conforming to an ISO standard, is unique and, via a database, provides all the information necessary to completely identify the vehicle 1, including (the list below is non-exhaustive): the name of the manufacturer, the name of the vehicle model 1, the destination market (ie the geographical area, eg USA, Europe) the generation to which it belongs model (eg first generation, second generation), roof type (flexible, rigid), year of production, production plant, engine.

As illustrated in FIG. 2, the vehicle 1 is also equipped with a communication interface 4, which can be integrated into a multimedia system fitted to the vehicle 1. This interface 4 can operate according to various wireless communication protocols allowing the transmission of data to a remote server, including GPRS, 3G, 4G (non-exhaustive list), possibly via a mobile communication device - such as a smartphone - notably thanks to an interface component (commonly called a Dongle).

The server 5 is in communication with (this expression may mean that the server 5 includes) a data base 6 comprising a list of identifiers among which is that of the vehicle 1, and, for each identifier, a map 7 d polluting emissions. It will be noted that the relation between a given identifier and a map 7 is not necessarily bijective. To save memory, it may indeed be advantageous to group the vehicles by type and memorize the same map 7 for several identifiers.

As illustrated in FIG. 2, this map 7 can be in the form of a graph providing an evaluation of the quantity of pollutant emissions generated for given pipe parameters.

Thus, the map 7 can provide an estimate of the quantities of nitrogen oxides (NOX) produced (in the case of a diesel engine), or quantities of CO produced (in the case of a gasoline engine), for a given engine speed and engine load, as transmitted in real time to the server 5 by the communication interface 4 of the vehicle 1.

This estimate can be in the form of a quantity (eg in g / km) or a code (eg a number) corresponding to a zone of the graph in which the estimated quantity is located. Thus, the map 7 illustrated in FIG. 2 comprises five zones numbered from © to ©, delimited by broken lines and filled with patterns with increasing density points (from left to right and from bottom to top) and corresponding to quantities increasing emissions - © corresponding to low quantities of emissions and © to high emission quantities. The objective is to control emissions without, however, directly affecting the driving of the vehicle 1, which is left to the discretion of its driver. Nevertheless, the latter receives information (which may include data and / or warnings) characteristic of the emissions of his vehicle 1 according to his conduct. More precisely, this information is transmitted to a programmed mobile device 8 for rendering them in visual and / or sound form via a user interface comprising a screen and / or a loudspeaker.

It will be noted that all or part of the processing (in particular the estimation of the emissions of the vehicle 1 and the development of the information 11) can be carried out locally by the mobile apparatus. For this purpose, the map can be memorized within it.

According to a first embodiment illustrated in FIG. 1, the mobile device 8 is in the form of a smartphone or a tablet which is provided with the driver.

According to a second embodiment illustrated in FIG. 3, the mobile device 8 is in the form of a multimedia system fitted to the vehicle 1.

More precisely, to control the emissions, it is proceeded as follows.

In the first place, the driving parameters of the vehicle 1 are measured in real time by the sensors 3.

As already mentioned, these driving parameters are selected from the following list: engine speed, engine load, throttle position, gear ratio, vehicle speed.

These parameters are transmitted by the sensors 3 to the OBD 2, then transmitted by the OBD 2 (possibly after selection) to the remote server 5 with the identifier of the vehicle 1, via a metropolitan telecommunication network 10 (MAN) or extended (WAN) such as the Internet. Transmission can be via a mobile device.

The server 5 extracts from the database 6 a map 7 of emissions corresponding to the identifier of the vehicle 1, e.g. in the form of a graph as illustrated in FIG.

In a variant, the OBD transmits the parameters to the mobile device 8 that includes the map 7, in a memory internal to the device 8. From this map 7 and the measured (and transmitted) driving parameters, the server 5 (or directly the mobile device 8) calculates an estimate of the emissions of the vehicle 1. Thus, in the case where the driving parameters include the engine speed and the engine load, and where the emissions are nitrogen oxides (NOX) whose quantity depends on these two parameters, the server 5 calculates an estimate of nitrogen oxide emissions using mapping developed from these parameters. From this estimate, the server 5 (or the apparatus 8 mobilel) elaborates a characteristic information 11 thereof. This characteristic information may be the estimate itself, or, as evoked, a datum (such as a digit included for example between 1 and 5 and designating the corresponding area of the map 7 in which the transmission is located. estimated - from © to © in the example of FIG.

The server 5 transmits this information 11 to the mobile device 8 (if it has not determined it itself), which restores it on its interface 9. The mobile device 8 can integrate a software application programmed to translate and / or enrich this information 11, that the driver might not be able to interpret directly.

In the example illustrated in FIG. 1 and FIG. 2, the displayed information 11 includes the emission estimate.

As mentioned, information 1 can be enriched. Thus, when the emissions calculated by the server 5 (or by the apparatus 8) exceed a predetermined threshold (for example 220 mg NOx / km in the case of a diesel-engined vehicle), this can be programmed to generate an alert 12, which is relayed for restitution to the mobile device 8.

Such an alert 12 is illustrated in the form of a triangular symbol characteristic of a hazard, immediately understandable by the driver. The alert 12 may be accompanied by a written or audible message, in the form of a recommendation to change the driving mode, suggesting, for example a particular action on the part of the driver - here to reduce the engine speed ("lower engine speed", see FIG.1 and FIG.3), e.g. moving to a higher box ratio.

It is thus clear that the method just described makes it possible to control (both in the sense of "monitor" and "regulate") the pollutant emissions of motor vehicles without, however, exerting a direct action on the driving of the vehicle, but encouraging the driver to adapt his driving mode according to messages communicated to him via a mobile device 8 at his disposal.

These automated incentives can reduce the polluting emissions of vehicles 1 without the need to act directly on them (which could be considered intrusive - and therefore restrictive of freedom - by drivers), but without leaving the unconscious drivers of emissions.

Claims (7)

A method for controlling the emissions of an automobile vehicle (1), which comprises the following operations: measuring in real time the driving parameters of the vehicle (1); take into account a vehicle identifier (1) and a map (7) of emissions of the vehicle (1) corresponding to the identifier; from this map (7) and the measured driving parameters, estimate the emissions of the vehicle (1); from this estimate, elaborate information (11) characteristic of it; retrieving this information (11) on a user interface (9) of a mobile device (8), characterized in that it comprises, when the emissions of the vehicle (1) exceed a predetermined threshold, an operation of generating a alert (12) and an operation of restitution of this alert (12) on the user interface (9) of the mobile device (8), the alert comprising a recommendation to change the driving mode. 2. Method according to claim 1, characterized in that the driving parameters are chosen from the following list: engine speed, engine load, the position of the accelerator, the gear ratio, the speed of the vehicle ( 1). 3. Method according to claim 1 or claim 2, characterized in that the vehicle identification data comprise one or more elements selected from the following list: vehicle identification number (1), name of the manufacturer, brand of the vehicle. vehicle (1), vehicle type (1), vehicle engine (1), date of manufacture of the vehicle (1). 4. Method according to one of the preceding claims, characterized in that it comprises a transmission operation of the driving parameters to a server (5) remote, in communication with a base (6) of data on which the mapping (7) is stored. 5. Method according to claim 4, characterized in that the emission estimate of the vehicle (1) for producing the information (11) is performed by the server (5). 6. Method according to claim 5, characterized in that it comprises a transmission operation of the information (11) to the device (8) for restitution mobile. 7. Method according to one of claims 1 to 3, characterized in that the emission estimation operations of the vehicle (1) for producing the information (11) are performed by the device (8) mobile.