Electric motor vehicle resulting from the transformation of an original thermal engine version of the vehicle

Abstract

Electric motor vehicle resulting from the transformation of an original thermal engine version of the vehicle Vehicle (1) with electric motor resulting from the transformation of an original thermal engine version of the vehicle (1), the thermal engine of the original version comprising a thermal engine control module communicating with various components of the vehicle (1) via at least one computer network (10), the vehicle (1) with electric motor comprising: • at least one electric motor (2) mounted as a replacement for the thermal engine of the original version, • at least one electrical power supply battery (5), • an electric motor control module (13) communicating with said at least one computer network (10),at least part of the data transmitted on said at least one computer network (10) by the electric motor control module (13) being identical to at least part of the data initially transmitted by the thermal engine control module of the original version, the electric motor control module (13) being configured to interpret at least part of the data of the computer network (10) initially intended for the thermal engine control module. Figure for the abstract: Fig. 1,

Description

Description Title of the invention: Electric motor vehicle resulting from the conversion of an original internal combustion engine version of the vehicle technical field

[0001] = The present invention relates to the technical field of motor vehicles electric resulting from the conversion of an original internal combustion engine version of the vehicle, particularly but not exclusively heavy goods vehicles. The invention relates to in particular an electric motor vehicle resulting from the conversion of a original internal combustion engine version of the vehicle including a control module of an electric motor communicating with various components of the vehicle. The invention has another object is a method for manufacturing such a motor control module electric and a manufacturing process for such a vehicle. Previous technique

[0002] — The average lifespan of a vehicle, particularly a heavy goods vehicle, with an engine The lifespan of a thermal engine is less than 10 years, or even 5 years for long-distance transport. primarily due to environmental regulations.

[0003] — Thus, many still-functional vehicles are scrapped and replaced by of the new ones, which requires new material and energy resources, harming to environmental protection.

[0004] = Since the decree of March 13, 2020, French legislation authorizes the transformation subject to conditions of conversion of internal combustion engine vehicles to electric vehicles and their homologation. To obtain homologation, the legislation specifies, among other things, that the motorcycle group the electric propulsion system must provide roughly the same power as the motor- thermal propulsion and the unladen weight and load distribution on the axles must be substantially identical before and after transformation.

[0005] — The vast majority of current vehicles include various components communicating with each other via one or more computer networks, for example Multiplexed computer networks. Among these components, we can notably mention the engine control module, automatic transmission if applicable, the driving aids (anti-lock braking system (ABS), electronic stability control) trajectory (ESP), speed limiter / controller), the dashboard, the equipment of the passenger compartment (seats, air conditioning, mirrors, navigation) or in some cases a intelligent servicing box (known by the acronym BSD).

[0006] When the internal combustion engine is replaced by an electric motor, the different components can no longer communicate with the engine control module thermal. This can cause various electronic problems, such as the display of fault lights, or even the malfunction of certain electronic systems. It is known from WO 2020 / 25859 to replace the vehicle control unit of an electric vehicle converted from a combustion engine vehicle. However, this technique is relatively expensive and requires a significant amount of time for the conversion. There is a need for an electric vehicle resulting from the conversion of an original internal combustion engine version of the vehicle, where the electronic integration of the electric motor is facilitated and the time required for the conversion is reduced. Description of the invention The present invention addresses all or part of this need and achieves this through, according to one of its aspects, an electric motor vehicle resulting from the conversion of an original internal combustion engine version of the vehicle, comprising an internal combustion engine control module communicating with various components of the vehicle via at least one computer network, the electric motor vehicle comprising: at least one electric motor mounted to replace the internal combustion engine from the original version, at least one power supply battery, an electric motor control module, as a replacement for the module internal combustion engine control unit, communicating with said at least one computer network, at least some of the data transmitted on said network minus a computer network via the engine control module electrical being identical to at least part of the initial data emitted by the internal combustion engine control module of the version originally, the electric motor control module was configured for interpret at least part of the data from the computer network ini- tially intended for the internal combustion engine control module. Thanks to the invention, the control module can output the same data as the internal combustion engine control module of the original version. Furthermore, the control module can interpret the data emitted by the various components of the vehicle. Thus, the control of the electric motor via at least one computer network is transparent to the vehicle; that is, it is carried out in the same way as in the original version. In a sense, the electric motor control module "mimics" the internal combustion engine control module of the original version. Thus, the architecture of at least one computer network and the computers of the other vehicle components are advantageously identical to those of the original version. The integration of the electric motor during the conversion is therefore simple and transparent for the user. By "data," we mean a set of frames, each frame containing a type of information and the encoding format for the value or state associated with that type of information. For example, a frame might consist of the engine's rotation speed and the encoding format for that engine speed value. The vehicle may include at least one computer network for multiplexed data communication, for example a value added network (VAN) or a controller area network (CAN). The vehicle may include at least one RS 485 data communication computer network. The communication protocol of at least one computer network can be known, for example, according to the SAE J1939 or SAE J1587 standard. In this case, the encoding of at least some of the data can be done according to known rules. In particular, the type of information and the encoding format of a piece of data can, at least in part, be determined using a public database of the protocol. When the communication protocol of said at least one computer network is according to a known protocol, for example according to the SAE J1939 standard, data initially emitted by the control module of the internal combustion engine of the original version may be proprietary, that is to say that knowledge of the known protocol alone does not allow them to be interpreted. The electric motor control module can transmit at least some of the proprietary data initially transmitted by the internal combustion engine control module. The fact that the control module can transmit proprietary data over at least one computer network can help prevent malfunctions in certain components. The electric motor control module may include a bus connected to at least one computer network, including a multiplexing interface. The bus allows data to be read and transmitted on said at least one computer network. The electric motor control module may include a processing unit that can comprise a microprocessor, read-only memory (ROM), and random-access memory (RAM). The processing unit analyzes data from at least one computer network and / or various sensors. The processing unit also sends commands to one or more actuators, such as, for example to increase the speed of the electric motor. The different sensors can be chosen from the group consisting of a motor temperature sensor, a motor rotation speed sensor, an electrical voltage sensor, an electrical current sensor and a torque sensor. The various actuators can be chosen from the group consisting of an electric motor voltage controller, an electric current controller flowing through the electric motor, including an AC frequency controller where appropriate, and a safety circuit breaker. The various vehicle components can be selected from the following group: a central door locking system, an alarm, interior lighting, an immobilizer, a windshield wiper system, a headlight control system, one or more driver assistance systems (anti-lock braking system (ABS), electronic stability program (ESP), electronic brake-force distribution (EBD), engine torque control during deceleration (MSR), electronic traction control (ASR)), interior equipment (seats, air conditioning, mirrors, navigation, radio, heating, refrigerator), a body control module (BSI), an automatic transmission if applicable, a suspension system, a tire pressure monitoring system, a battery, specifically 12V or 24V depending on the vehicle's original voltage, a wheel, a braking system, a pedal assembly, a power steering system, an airbag,A window opening system, a horn, and rearview mirrors. Each component may include a control unit connected to at least one computer network, the control unit allowing it to read and / or transmit data to and from that network. The various control units of the vehicle's components may be interconnected via this at least one network. The various control units may be interconnected using at least one bus, for example, at least one CAN bus. The electric motor can be a synchronous or asynchronous motor. The electric motor can operate with alternating current (single-phase or three-phase) or direct current. The vehicle may include a display device visible to the driver. The electric motor control module may be configured to display at least one piece of information about the vehicle's operation on the display device, including at least one of the following: motor speed, vehicle speed, battery charge level, and motor temperature. The display device is preferably the original version, which allows for significant time savings during production. Indeed, thanks to the invention, the data on said at least one computer network The data concerning the operation of the electric motor are identical to the data concerning the operation of the internal combustion engine of the original version. Thus, for the display device, when the control module triggers the display, the change in motor type is not detectable. Said at least some of the data emitted by the electric motor control module may include at least one piece of information on the motor's rotational speed, a diagnostic, the charge level of said at least one battery and / or the temperature of the electric motor. Said at least part of the data interpreted on the computer network may include a position of an accelerator pedal and / or a brake pedal, data from a speed limiter or cruise control or data from driver assistance systems, and information on the operating status of the various components. The electric motor control module can be configured to prevent the display of fault indicators on the instrument panel to indicate malfunctions in the vehicle's original version during normal operation. For example, this could prevent the display of faults such as low engine oil pressure, abnormal coolant temperature, catalytic converter malfunction, service indicator, particulate filter saturation, faulty glow plugs, etc. Indeed, the display of these fault indicators does not necessarily indicate a genuine malfunction of the electric vehicle. Furthermore, in some cases, the display of one of these indicators may be accompanied by an inability to start the vehicle. The vehicle may include at least one hydrogen tank and at least one fuel cell producing electricity, at least for the electric motor. In this case, the display device may be configured to show the hydrogen tank's fill level. For example, the display device can be ordered to display the hydrogen tank fill level using a display module originally used before vehicle conversion to display the AUS32 (also known as AdBlue®) tank fill level. For example, the display device can be commanded to trigger the display of the low fuel level indicator when the battery charge is low and / or when the hydrogen tank fill level is low. The vehicle may include at least one electric battery, notably as a replacement for a fuel tank in the original internal combustion engine version of the vehicle. The vehicle may include a battery management system, also known as a BMS (Battery Management System), communicating with said at least one computer network. In this case, at least some of the data emitted by the battery control system may include information on the charge level of at least one battery. In the original version of the vehicle, equivalent data was provided and emitted, for example by a probe immersed in the fuel, to indicate the fuel tank level. The battery control system can be configured to control the charging of said at least one battery. The battery control system can be connected to the electric motor control module. In this case, the battery control system communicates with said module via at least one computer network through the electric motor control module. The electric motor control module can be configured to control the electric motor, specifically by controlling its voltage, the electrical current supplied, and its rotational speed. Preferably, the control of the electric motor is at least partially achieved through data interpreted on at least one computer network and received by the control module. The vehicle is preferably a heavy goods vehicle. A "heavy goods vehicle" is defined as a motorized vehicle with a gross vehicle weight exceeding 3.5 tonnes. A heavy goods vehicle can be a truck capable of towing a trailer (also called a "tractor truck"), a flatbed or fixed-bed truck, a rigid truck, an agricultural tractor, a bus, a coach, or a special vehicle, such as a fire engine or military vehicle. The distribution of equipment within the vehicle can vary depending on the type of vehicle, particularly for heavy goods vehicles. Alternatively, the vehicle is a so-called light vehicle, such as a car. Method for simulating an electric motor control module The invention also relates, according to another aspect, independently or in combination with the foregoing, to a method for simulating a thermal engine control module communicating with at least one computer network of a vehicle, the method comprising the following steps: a. To transmit data over said at least one computer network in such a way as to that at least some of the data transmitted on said at least one network in- the format must be identical to at least part of the data initially emitted by the internal combustion engine control module, b. Read at least some data from said at least one network in- computer systems initially intended for the engine control module thermal. This process makes it possible to simulate a control module for a vehicle's internal combustion engine. This allows, in particular, the use of a converted vehicle, for example, an electric vehicle as defined previously, with the conversion being invisible to the various components connected to at least one network. Method for programming an electric motor control module The invention also relates, according to another of its aspects, independently or in combination with the foregoing, to a method of programming an electric motor control module of an electric vehicle, preferably as defined above, resulting from the conversion of an original internal combustion engine version of the vehicle, the method comprising the following steps: a. on the original internal combustion engine version of the vehicle, including the internal combustion engine control module, perform at least one recording record of data issued on said at least one computer network by at least some of the vehicle's components towards at least some of the other vehicle components, b. Disconnect the control module from the internal combustion engine of said engine at least one computer network, c. make at least one record of data emitted on said at least one computer network via at least some of the vehicle's components towards the minus some of the other vehicle components, d. compare the data recorded in step c) with that of step a) in order to to identify data recorded in step a) but not recorded at step c), $. determine the functionality of each piece of data thus identified by the com- comparison carried out in step d), Write a program and program the motor control module electric with said program so that it can emit on said at least a computer network at least some of the data, initially transmitted by the internal combustion engine control module, using the data identified in step d) and using the determination from step e). Thanks to the invention, after implementation of this process, the electric motor control module is able to "imitate" the internal combustion engine control module of the original version. The process may include, before step d), a step consisting of decomposing into frames the data recorded in step a) and in step c). In this case, step d) may be implemented so as to identify data frames recorded in step a) but not recorded in step c). Step e) may consist of determining the functionality of each frame. When the communication protocol of at least one computer network is based on a known protocol, for example, SAE J1939, the method is implemented in step f) such that the program and programming of the electric motor control module enable the identification and interpretation of at least some of the data from the computer network initially intended for the internal combustion engine control module, by referring to the known rules of the protocol. For example, identification can be achieved by determining whether the type of information in each piece of data read from the computer network is intended for the engine control module. When the communication protocol of said at least one computer network is according to a known protocol, for example according to the SAE J1939 standard, the determination of the functionality of each data in step e) can be at least partially carried out by referring to said known rules of the protocol. When data initially emitted by the internal combustion engine control module of the original version is proprietary, the process makes it possible to identify and interpret it, for example by observing the reaction of the original components of the vehicle when proprietary data is emitted. Thus, the electric motor control module can transmit at least some of the proprietary data initially transmitted by the internal combustion engine control module. The fact that the control module can transmit proprietary data over at least one computer network can help prevent malfunctions in certain components. During step a), several recordings can be made successively, in particular under the following successive conditions: with the engine switch off, with the engine switch on, when the internal combustion engine is running and in a phase of acceleration of the vehicle. During step c), several recordings can be made successively, in particular under the following successive conditions: with the motor contactor off and with the motor contactor on. The process may include the step of saving the electric motor control module program in a database, for example, by identifying it for a vehicle model. This may make it possible to program an electric motor control module for a given model of electric vehicle using the program saved in the database, if the program for that model is available in that database. Method for programming a series of control modules The invention also relates, according to another of its aspects, independently or in combination with the foregoing, to a programming method for at least two electric motor control modules of an electric vehicle, preferably as defined above, resulting from the conversion of an original internal combustion engine version of the vehicle, the process comprising the following steps: a. Program a first electrical control module according to the following method: programming of an electric motor control module defined more at the top or by using a program stored in a database, said program having been obtained using the programming process of a electric motor control module defined above, b. program one or more electric motor control modules sup- additional information can be obtained by copying the program from the motor control module. electric. The process is particularly well-suited for converting a series of internal combustion engine vehicles into electric vehicles. Specifically, the series of internal combustion engine vehicles can consist of vehicles of the same model. Thus, for a given vehicle model, it is possible to carry out step a) only once and to carry out step b) for each vehicle of the given model, which makes it possible to accelerate the rate of transformation of a series of thermal vehicles into electric vehicles. Process of conversion into an electric vehicle The invention also relates, according to another aspect, in combination with the foregoing, to a method of transforming an original internal combustion engine version of the vehicle into an electric vehicle as defined above, the method comprising the following steps: to program an electric motor control module according to the process programming of a defined electric motor control module higher up or by using a program stored in a database, said program having been obtained using the programming process of a electric motor control module defined above, b. replace the internal combustion engine with an electric motor comprising said electric motor control module, € connect the electric motor control module to at least one vehicle computer network. Thanks to the invention, the conversion of an original internal combustion engine version into an electric vehicle is simplified, since it is not necessary to modify the architecture of said at least one computer network of the original vehicle nor the components connected to said at least one computer network. The process can be implemented for a series of vehicles, including those of the same model. Electric motor control module The invention also relates, according to another of its aspects, independently or in combination with the above, to a control module for an electric motor of an electric vehicle resulting from the transformation of an original version with a thermal engine comprising a control module for the thermal engine communicating with various components of the vehicle via at least one computer network, the control module for the electric motor being configured so that it can transmit at least some of the data initially emitted by the control module for the thermal engine and interpret at least some of the data from the computer network initially intended for the control module for the thermal engine. Brief description of the drawings The invention will be better understood upon reading the detailed description that follows, the non-limiting examples of its implementation, and upon examination of the attached drawing, in which [Fig.1] [Fig.1] illustrates, schematically, in top view, various assembled elements of an example of a vehicle according to the invention, [Fig.2] [Fig.2] illustrates, schematically and partially, an example of a computer network in a vehicle according to the invention, [Fig.3] [Fig.3] schematically illustrates an example of a control module for an electric motor of a vehicle according to the invention, [Fig.4] [Fig.4] illustrates, schematically, in front view, an example of a vehicle display device according to the invention, [Fig. 5] [Fig. 5] illustrates in block diagram the steps of an example of a programming method for an electric motor control module according to the invention, and [Fig.6] [Fig.6] illustrates in block diagram the steps of an example of a process for converting into an electric vehicle according to the invention. Detailed description In the following description, identical elements or elements with identical functions are marked with the same reference numeral. For the sake of brevity, they are not described alongside each figure; only the differences between the embodiments are described. In the figures, the actual proportions have not been respected, for the sake of clarity. Figure 1 illustrates an example of vehicle 1 resulting from the transformation of an original internal combustion engine version of vehicle 1 according to the invention, in this example a road tractor comprising an advanced cab C. As illustrated, vehicle 1 has an electric motor 2 mounted in place of the internal combustion engine of the original version and positioned under cab C in a location initially intended for the internal combustion engine of the original version. In this example, the electric motor 2 has the same power output as the internal combustion engine of the original version. Vehicle 1 also includes a plurality, in the illustrated example six, of electrical power batteries S. In this example, they are arranged in the wheel wells of the road tractor in place of the fuel tanks of the original version. The batteries 5 each have a capacity of 10 kWh. The vehicle | also includes a computer network 10 for data communication, in this example by CAN multiplexing, part of whose architecture is illustrated in [Fig.2]. The communication protocol of computer network 10 is, in this example, according to the SAE J1939 standard. Thus, data encoding is done according to known rules. In this example, the computer network 10 comprises various computers 11 connected to each other by a CAN bus 12. Each computer 11 has a bus connected to the CAN bus 12 allowing it to read and / or transmit data on the computer network 10. Each computer 11 is linked to a component of the vehicle 1, for example, the suspension, lights, driver assistance systems (ABS, ESP, etc.), a multi-function display, the radio, the air conditioning, a display device, accessories, a gearbox, etc. Vehicle 1 also includes an electric motor control module 13, replacing the internal combustion engine control module, which is configured to transmit and interpret data on the computer network 10. In the original version, the internal combustion engine control module receives information related to the engine, such as the coolant temperature, fuel level, engine speed and / or oil pressure. In this example, the data emitted on said at least one computer network 10 by the control module 13 of the electric motor are identical to at least part of the data initially emitted by a control module of the internal combustion engine of the original version. In addition, the control module 13 of the electric motor is configured to interpret data from the computer network 10 initially intended for the control module of the internal combustion engine. In this example, the internal combustion engine control module of the original version outputs proprietary data. Engine control module 13 electric can emit at least some of the proprietary data initially emitted by the internal combustion engine control module. Thus, the electric motor control module 13 simulates the internal combustion engine control module according to the process comprising the following steps: a) transmit data on the computer network 10 in such a way that at least a part of the data transmitted on the computer network 10 is identical to at least a part of the data initially transmitted by the control module of the internal combustion engine, b) read at least a portion of data from the computer network 10 initially intended for the control module of the internal combustion engine. In this example, the architecture of the computer network 10 and the computers 11 of the retained components of vehicle 1 are identical to those of the original version. As illustrated in [Fig.3], the electric motor control module 13 includes a multiplexing interface 15 configured to allow the transmission and reading of data transferred by the computer network 10 using a bus connected to the CAN bus 12. The electric motor control module 13 also includes a processing unit 16 comprising, in this example, a microprocessor, read-only memory (ROM), and random-access memory (RAM). The processing unit 16 is configured to communicate with the multiplexing interface 15 and is arranged to allow the analysis of data circulating on the computer network 10 and to enable data transmission. The processing unit 16 is designed to receive various data from different sensors, including those of the electric motor 2 and the batteries 5 via a battery control system 17. For example, the processing unit 16 can receive data from a rotational speed sensor of the electric motor 2, a temperature sensor of the electric motor 2, a voltage or current sensor in the electric motor 2, a charge level sensor of each battery 5, a temperature sensor of each battery 5, information on the wear status of the batteries 5 or the electric current in the batteries 5, for example in order to determine the maximum discharge or recharge current. In this example, the battery control system 17 communicates with the computer network 10 via the control module 13. The processing unit 16 is also designed to send commands to one or more actuators on the various components. For example, the processing unit 16 can vary the voltage or electrical current in the electric motor 2 in order to vary the speed of the electric motor 2, in particular its torque or rotational speed. The control of the electric motor 2 is adapted according to the data interpreted on the computer network 10, for example according to data on the position of an accelerator pedal and / or a brake pedal, data from a speed limiter or a speed regulator or data from the driving assistance systems, and information on the operating status of the various components. The electric motor control module 13 can be configured to transmit data on the computer network 10, in this example, providing information about the electric motor 2, including its rotational speed and temperature. This data is identical to the data providing the same information about the internal combustion engine in the original version. The control module 13 of the electric motor can be configured to transmit on the computer network 10, in this example, data giving information on the charge level of the batteries 5, this information being given by the control system 17 of the batteries 5. This data is identical to the data initially giving information on the fuel level on the original version. In this example, vehicle 1 has a hydrogen tank 20 and a fuel cell 21 producing electricity at least for the electric motor 2. As illustrated in [Fig.1], the hydrogen tank 20 and the fuel cell 21 are arranged on the back of the cabin C of vehicle 1. In this example, the vehicle | still includes a display device 25 visible to the driver of the vehicle in the cab C, an example of which is illustrated in [Fig.4]. The display device 25 is that of the original version in this example and includes various needle gauges, including a speedometer 26 displaying the vehicle speed, a tachometer 27 initially displaying the rotational speed of the internal combustion engine of the original version, a fuel gauge 28 initially displaying the fill level of the fuel tanks of the original version, an AUS32 gauge 29 initially displaying the fill level of the AUS32 tanks of the original version, a water temperature gauge 30 initially displaying the temperature of the coolant of the internal combustion engine of the original version and an oil temperature gauge 31 initially displaying the temperature of the oil of the internal combustion engine of the original version.. As can be seen in [Fig.2], the display device 25 includes a controller 24 which is connected to the computer network 10. The electric motor control module 13 is arranged to cause the display on the display device 25 of the motor speed 2 on the tachometer 27, the battery charge level 5 on the fuel gauge 28, the hydrogen tank fill level 20 on the AUS32 gauge 29 and the temp- Electric motor temperature 2 on the water temperature gauge 30. For the control module of the display device 25, the change of motorization is not detectable because the data on said computer network giving information on the operation of the electric motor is identical to the data concerning the operation of the internal combustion engine of the original version. The display module 25 also includes an indicator panel 35 initially intended to display fault indicators when the internal combustion engine of the original version is not operating nominally, for example for a fault in engine oil pressure, an abnormal coolant temperature, a catalytic converter fault, a low fuel level, a saturated particulate filter, a defective glow plug, etc. The electric motor control module 13 is configured to prevent the display of fault indicators on the display device 25, particularly on the warning light panel 35, to indicate anomalies in the vehicle's original version during normal operation. Indeed, the unjustified display of some of these indicators can be disruptive to the vehicle user 1, or even, in some cases, prevent the vehicle 1 from being used. The display device 25 is, in this example, controlled to trigger the display of the low fuel level indicator when the charge of the batteries 5 is low and / or when the fill level of the hydrogen tank 20 is low. Reusing the display device 25 from the original version allows for significant time savings during the transformation of the original version. An example of a programming method for an electric motor control module 13 of a vehicle 1, preferably as defined above, resulting from the transformation of an original internal combustion engine version, is illustrated in [Fig.5]. In a first step 40, the data emitted on the computer network 10 are recorded by connecting a recording system to a CAN USB interface on the original unmodified thermal vehicle, which therefore still includes the original thermal engine and its control module. During this step 40, several recordings are made: a first with the internal combustion engine switch off, a second with the internal combustion engine switch on, a third with the internal combustion engine on and a fourth during a phase of acceleration of vehicle 1. In step 41, the thermal engine control module is disconnected from the computer network 10. In step 42, new data recordings transmitted on the computer network 10 are made. Several recordings are made successively, for example, a recording with the motor contactor off and then a recording with the engine switch on. Steps 40 and 42 allow for the recording of a multitude of data circulating in the computer network 10. In step 43, the data is broken down into different frames, each containing, in this example and in a way that is known per se, a type (e.g., Rx), an identifier (e.g., 18EEFF19), a frame length code (e.g., 8), and an information field (e.g., BS 8E 20 04 00 15 02 20). In this example, the frame, encoded in hexadecimal, gives Rx 18EEFF19 8 BS 8E 20 04 00 15 02 20. In step 44, the different data recorded in step 42, in this example the frames decomposed from this data, are compared with those of step 40 in order to identify the frames recorded in step 40 but not recorded in step 42. In step 45, the functionality of each piece of data, in this example of each identified frame, is determined. In this example, one part is identified by referring to the known rules of the communication protocol according to the SAE J1939 standard, and another part, containing proprietary data, is identified by observing the reaction of the original components of vehicle 1 when proprietary data is transmitted. Finally, in step 46, a program is written and the control module 13 of the electric motor is programmed with this program, in particular using the data identified in step 44 and using the determination of step 45, so that it can transmit at least part of the data initially emitted by the control module of the internal combustion engine, in particular proprietary data, and interpret at least part of the data from the computer network initially intended for the control module of the internal combustion engine. In this example, the program and programming of the electric motor control module make it possible to identify and interpret at least part of the data from the computer network initially intended for the thermal engine control module, by referring to the known rules of the known protocol. In this way, the electric motor control module 13 is able to "mimic" the internal combustion engine control module of the original version. For example, the electric motor control module 13 can send virtual data on the electric motor to the computer network 10, such as information related to the coolant temperature or engine oil pressure. The process of transforming an original internal combustion engine version of the vehicle into a vehicle 1 as described above is illustrated in [Fig.6]. In step 50, an electric motor control module 13 is programmed using the method defined above or using a program stored in a database, said program having been obtained using the method of programming an electric motor control module 13 defined above. Using a database allows the program for the control module 13 of the electric motor to be created only once for the same model of electric vehicle 1. This program can then be used for several vehicles of the same model. In step 51, the internal combustion engine of the original version is replaced by an electric motor 2 comprising the electric motor control module 13 programmed as follows. Finally, in step 52, the control module 13 of the electric motor is connected to the computer network 10 of vehicle 1. The invention is not limited to the examples just described. In particular, the vehicle may be different, specifically it may consist of another type of heavy goods vehicle or a car. The computer network can be different, for example it can be a VAN computer network. The vehicle may contain several computer networks, which may or may not be interconnected. The display device may be different, for example a digital display. The hydrogen tank fill level 20 can be displayed differently, for example on a remote screen, especially when the display device does not include an AUS32 gauge.

Claims

Demands

1. Electric motor vehicle (1) resulting from the conversion of a original internal combustion engine version of the vehicle (1) comprising a internal combustion engine control module communicating with different vehicle components (1) via at least one computer network (10), the electric motor vehicle (1) comprising: at least one electric motor (2) mounted in place of the internal combustion engine from the original version, at least one (5) power supply battery, an electric motor control module (13), in rem- placement of the internal combustion engine control module, communicating with said at least one computer network (10), at least part of the data issued on the said at minus a computer network (10) by the module of control of the electric motor (13) being identical to that minus a portion of the data initially issued by the internal combustion engine control module of the version originally, the electric motor control module (13) being configured to interpret at least part of the computer network data (10) initially intended for internal combustion engine control module.

2. Vehicle according to claim 1, comprising at least one in- data communication (10) by multiplexing, by for example, a value-added computer network (in English, "Value") Added Network (or VAN) or a computer network of controllers (in English "Controller Area Network" or CAN).

3. A vehicle according to one of claims 1 and 2, comprising a device display (25) visible to the driver of the vehicle (1), the module of control of the electric motor (13) being arranged to cause the display on the display device (25) of at least one piece of information on the operation of the vehicle (1), the display device (25) preferably that of the original version.

4. Vehicle according to claim 3, the engine control module electrical (13) being configured to prevent display, on the display device (25), fault indicator light to indicate anomalies in the original version of the vehicle, during operation nominal.

5. A vehicle according to one of claims 3 and 4, comprising a tank hydrogen (20) and a fuel cell (21) producing electricity at least for the electric motor (2), the device display (25) being configured to display the fill level of the hydrogen tank (20).

6. Vehicle according to any one of the preceding claims, in which, said at least a part of the data emitted by the module of the electric motor control includes at least one piece of information on the engine rotation speed, a diagnostic, the charge level of said at least one battery and / or the electric motor temperature.

7. Vehicle according to any one of the preceding claims, in which, said at least a part of the data interpreted on the network computer includes a position of an accelerator pedal and / or from a brake pedal, data from a limiter or a re- cruise control or data from driver assistance systems to driving, and information on the operating status of the different organs.

8. Vehicle according to any one of the preceding claims, the vehicle (1) being a heavy goods vehicle.

9. Method for programming a motor control module electric (13) of an electric vehicle (1) according to any one of the claims 1 to 8, arising from the transformation of a version to original internal combustion engine of the vehicle (1), the process comprising the Next steps: a. on the original internal combustion engine version of the vehicle (1), including the internal combustion engine control module, to make at least one recording of data emitted on said at least one computer network (10) by at least one part of the vehicle's components (1) towards at least part of the other vehicle components (1), b. Disconnect the internal combustion engine control module said at least one computer network (10), c. make at least one recording of data emitted on said at least one computer network (10) by at least one part of the vehicle's components (1) towards at least part of the other vehicle components (1), d. compare the data recorded in step c) with those of step a) in order to identify data recorded in step a) but not recorded in step c), e. determine the functionality of each piece of data thus identified by the comparison made in step d), f write a program and program the control module (13) of the electric motor with said program so that it can broadcast on said at least one computer network (10) at least some of the data initially issued by the internal combustion engine control module, using the data identified in step d) and using the determination of step e).

10. A method according to the preceding claim, comprising, before step d), a step consisting of decomposing the recorded data into frames step a) and step c).

11. A method according to the preceding claim, wherein step d) is implementation in such a way as to identify data frames recorded recorded in step a) but not recorded in step c).

12. A method according to any one of claims 10 and 11, wherein, step e) consists of determining the functionality of each frame.

13. A method according to any one of claims 9 to 12, wherein, During step a), several recordings are made successively treatments, particularly under the following successive conditions: with the with the engine switch off, and the engine switch on, when the The internal combustion engine is running and in a phase vehicle acceleration.

14. A method according to any one of claims 9 to 13, wherein, During step c), several recordings are made successively treatments, particularly under the following successive conditions: with the engine switch off and with the engine switch on.

15. Method of converting into an electric vehicle (1) according to one any of the claims | to 8 of a version with an internal combustion engine of origin of the vehicle (1), the process comprising the following steps: a. Program an electric motor control module (13) according to the method according to any one of the claims indications 9 to 14 or by using a program stored in a database, said program having been obtained using the method according to any one of claims 9 to 14, replace the internal combustion engine with an electric motor (2) comprising said electric motor control module (13), connect the electric motor control module (13) to at least one computer network (10) of the vehicle (1).