PT110133B - COMMUNICATION, CONTROL AND DATA ACQUISITION SYSTEM FOR MOTOR VEHICLES - Google Patents

Abstract

THIS INVENTION CONCERNS A SYSTEM OF COMMUNICATION, CONTROL AND ACQUISITION OF DATA FOR APPLICATION IN AUTOMOTIVE VEHICLES (2), LIGHT AND HEAVY, WHICH PRESENTS AN ELECTRONIC DEVICE (1) WITH CONNECTION TO THE VEHICLE VIA PORTA OBD / OBDII (3) , ABLE TO CONTROL THE OPERATING STATUS OF VEHICLE CRITICAL SYSTEMS AND TO ACQUIRE THE OPERATING DATA PRESENT IN ITS DIGITAL BUSES. THE INVENTION USES TWO DIGITAL COMMUNICATION BUSES, A SERIAL BUS INTERFACE CIRCUIT, WHICH ALLOWS COMMUNICATION BETWEEN A COMPUTER (PC), OR OTHER EMBEDDED DEVICE, WITH THE VEHICLE DIAGNOSTIC BUS AND THE SYSTEM BUS. THIS INVENTION ALLOWS DATA ACQUISITION AND LOCAL VEHICLE CONTROL, INCREASES THE NUMBER OF ACQUIRED VARIABLES ACQUIRED, THE FREQUENCY OF DATA ACQUISITION, CONTROL OF THE CRITICAL SYSTEMS OF THE VEHICLE, REDUCING THE TIME OF RESPONSE ACCIDENT RESPONSE TIME. AND THE REPLICATION AND / OR REPLACEMENT OF THE VEHICLE ELECTRONIC CONTROL SYSTEMS.

Description

DESCRIPTION

COMMUNICATION, CONTROL AND DATA ACQUISITION SYSTEM FOR

MOTOR VEHICLES

TECHNICAL FIELD OF THE INVENTION The present invention relates to a communication, control and data acquisition system for motor vehicles, consisting of an electronic device (1) connected to the OBD / OBDII port (3) of a vehicle (2), capable of control the vehicle's functions associated with its motorization, transmission and braking, among other available systems. With access to multiple vehicle digital buses, the proposed system is capable of acquiring a wide range of variables at frequencies higher than those currently available on the digital communication bus for the purpose of diagnosis.

BACKGROUND OF THE INVENTION

Motor vehicles employ the latest control technologies in their electrical, electronic and mechanical systems. The high integration and potential of electronic control allowed, together with the technological evolution of materials and mechanical components, the optimization of efficiency, consumption and emissions of pollutants that characterize the most recent vehicles. Indeed, modern vehicles employ multiple sensory, computer and electronic control systems, which communicate with each other

1/19 by means of digital buses of the type CAN (Controller Area Network), LIN (Local Interconnect Network), RS232, SPI (Serial Peripheral Interface), I2C (Inter-Integrated Circuit), FlexRay and MOST (Media Oriented Systems Transport) , among others. Digital buses allow the precise exchange of information between

systems, the optimization of resources implemented and The simplification of connections electrical, contributing to The reliability, precision and velocity of the process in Communication.

With technological development, increased integration of programmable electronic systems (microcontrollers) and increased digital information available on vehicle digital buses, manufacturers have implemented an access point on the vehicle for communication with external systems. This access point, commonly called the diagnostic form, allows access to some of the system's operating variables and, in some cases, the reprogramming of parameters and / or codes embedded in some of the electronic control systems (firmware). Currently the connector / diagnostic plug, with the name of OBD / OBDII (On-Board Diagnostic), is standardized both in terms of its physical dimensions, in terms of its terminals and the respective protocols in its various layers. Figure 4 presents the typical diagnostic file used in a heavy vehicle (2) and the terminals for standardized protocols: specific Bus Line bus for communication according to SAE J1850 (36) (37), K Line / L Line bus specific for communication according to ISO9141-2 and ISO14230-4 (34) (35) and the diagnostic CAN bus for communication according to ISO15765-4, SAE J1979 and SAE

2/19

J1939 (20) (21). The OBD / OBDII plug also has the power terminals: battery / chassis ground (18), instrumentation ground (19) and battery positive (22). All other terminals (38) are not standardized and their use is specific to the manufacturer and the vehicle in question. In the case of light vehicles, the OBD / OBDII plug differs by the shape of the central slot (without a separator) and the voltage available at the positive battery terminal (12V).

CAN-type digital buses, due to their characteristics: high data transmission rates, great flexibility, noise immunity, etc., are currently the main digital communication bus used in motor vehicles. Still, it is not possible to connect all devices present in the vehicle on a single CAN bus. Being a half-duplex type bus, at a given moment only one device can write on the bus, so the level of bus occupation would be high, reducing its capacity and resulting in high access times. As Figure 5 exemplifies, the digital communication architectures in today's vehicles use several CAN-type buses.

A CAN bus dedicated to systems related to vehicle motorization (23), connects critical systems such as the electronic units of the propulsion engine (27), the transmission and gearbox system (28) and braking system (29 ), among others. This bus is the most critical, considering the necessary data transmission rates, the response times and the action of the messages transmitted on the operation of the vehicle. In turn, some of the units

3/19 of electronic control can connect to sensors and / or actuators (44) via dedicated CAN buses (42).

A second CAN bus (25) with a lower data transmission rate connects most non-critical systems, associated with the vehicle's comfort and instrumentation (32), examples are the air conditioning, lighting, alarm and central locking systems. of doors. As a rule, simpler local buses of the SPI type (43) are used to interconnect the electronic control units of these systems to the respective sensors and actuators. There may also be electronic control units that connect to more than one vehicle bus (39). Sometimes there are also specific busbars (40) (41) for connection to the instrument panel (31) and for connection to auxiliary, multimedia and convenience systems (33).

A coordinating system or connection bridge (26) interconnects the different digital buses present in the vehicle. This system is responsible for defining which messages can pass between buses and for collecting a set of data that are later broadcast (broadcasted) and / or sent according to the rules in force on the diagnostic bus (24). The use of a coordinating system affects communication with critical systems, for example on the driving system bus, and, even when possible, introduces delay times in sending and / or receiving messages.

The information present in the digital busbars of the vehicles is important for its diagnosis, study and begins to be increasingly important for the monitoring of the functioning of the vehicles, their components, in the control and

4/19 fleet optimization and preventive maintenance of vehicle components, among others. There are currently several devices that access the diagnostic bus (OBD port) and relay the available information, via a wired and / or wireless connection, to external systems / computers. Even so, there are several variables, important for the study of the vehicle and its components, which either because they are not registered (SAE J1979, SAE J1939 standards) and / or because of their nature, are not available on the diagnostic bus (OBD port) .

The evolution towards autonomous vehicles and vehicle platoons (Platooning), where vehicles circulate with short distances between them that allow the optimization of fuel / energy consumption and relaxation / comfort for the driver, add requirements to the level of access and control of the vehicle's critical and propulsion systems, such as the engine, braking system and transmission system, which are not possible in the current diagnostic port configuration.

Patent applications with publication number US 4271402, US 4277772, US 4442424, US 6832141, US 7212893 B2, US 20020031101 AI, US 20040225557 Al, EP 1627297 (A2), CN 106043165 (A), CN205714542 (U), CN105781844 (A), WO2016091439 (Al), CN103863220 (A), US 20070073458 AI, US 20140207351 Al, WO 2017016707 Al and CN202481030 (U) are examples of the state of the art closest to the present invention.

TECHNICAL PROBLEMS SOLVED

The present invention aims to:

5/19 • control of vehicle electronic systems associated with the digital communication bus of the vehicle's driving system (examples: engine speed control, vehicle speed control, start and stop the internal combustion engine and brake the vehicle );

• maximizing the number of parameters related to the operation of the vehicles, available at the diagnostic port;

• maximizing the frequency of acquisition of the acquired variables.

It is also an objective of the present invention that the control and data acquisition are carried out locally and autonomously (via the system connected to the vehicle's OBD / OBDII port) or remotely by other embedded systems and / or computers.

Thus, the present invention has the following advantages and unexpected technical effects over existing systems in the state of the art:

• ability to replicate and / or replace the electronic control and coordination systems present on the vehicle's driving system bus (23), by reproducing the respective messages;

• directly control the operating status of the vehicle's systems, using the physical user interface (11) and monitor (12);

• use the connection to two digital busses of the vehicles to carry out the acquisition of a wide range of vehicle operating data and to high acquisition rates, with a higher amount of data and frequency of acquisition

6/19 possible using the vehicle's diagnostic bus (26) only;

• control the operating status of the vehicle's systems, using commands received by the system for connection with external wired (9) (10) or wireless (15) devices;

• acquire engine operating data from messages automatically transmitted by vehicles' electronic control devices on buses and through the use of question and answer protocols;

• operate autonomously and store the acquired data in a non-volatile memory device connected to its interface for non-volatile memory devices.

DESCRIPTION OF THE FIGURES

Indication of reference numbers:

(1) electronic device;

(2) motor vehicle;

(3) OBD / OBDII port;

(4) cable;

(5) microcontroller;

(6) first interface for communication with digital bus of type CAN;

(7) second interface for communication with CAN type digital bus;

(8) supply voltage regulation and management module;

(9) interface for connection with external wired devices;

7/19 (10) interface for connection with external wired devices;

(11) physical user interface;

(12) local monitor for viewing and configuring control parameters and acquired data;

(13) interface module for device with non-volatile memory;

(14) connection for removable non-volatile memory device;

(15) module for connecting to external devices without threads;

16) terminal CAN_H for access to the bus in motorization the vehicle; 17) terminal CAN_L for access to the bus in motorization the vehicle;

(18) specific terminal for the vehicle's mass;

(19) specific terminal for the vehicle's instrumentation mass;

(20) CAN_H terminal specific for the CAN bus for diagnostics and for communication according to ISO15765-4, SAE J1979 and SAE J1939;

(21) CAN_L terminal specific to the CAN bus for diagnostics and for communication according to ISO15765-4, SAE J1979 and SAE J1939;

(22) specific terminal for the vehicle battery positive;

(23) CAN bus dedicated to systems related to vehicle motorization, that is, the driving system, with connection between the critical systems of the vehicle at a high data transmission rate;

(24) digital communication bus associated with the diagnostic file (26) and auxiliary and convenience systems (33);

8/19 (25) digital communication bus for comfort systems (32) and instrumentation (31);

(26) electronic coordination unit and / or bridge connecting the interface between the various digital buses present in the vehicle, that is, present in the diagnostic bus;

(27) electronic unit that manages the operation of the vehicle's propulsion engine;

(28) electronic unit that manages the operation of the vehicle's transmission system and gearbox;

(29) electronic unit that manages the operation of the vehicle's electromechanical braking system;

(30) electronic management unit present on the motorization bus of the vehicle (30);

(31) instrument panel and vehicle controls (32) non-critical systems, such as comfort systems, that is, air conditioning, lighting, alarm and central door locking;

(33) auxiliary, entertainment and convenience systems;

(34) K Line / L Line bus specific for communication according to ISO9141-2 and ISO142304 standards;

(35) K Line / L Line bus specific for

Communication according to ISO9141-2 standards and ISO14230- 4; 36) terminal positive of bus Bus Line specific for communication according to standard SAE J1850; 37) terminal negative of bus Bus Line specific for communication according to standard SAE J1850;

9/19 (38) other terminals;

(39) electronic control unit with connection to two different buses;

(40) CAN-exclusive communication bus for the vehicle's instrument panel (31);

(41) digital communication bus for entertainment systems (33) in the vehicle;

(42) CAN-type digital communication bus between a sensor module and / or actuator and an electronic vehicle control unit;

(43) digital communication bus type LIN (Local Interconnect Network), that is, simpler local buses, type SPI, for interconnecting sensors and actuators to an electronic control unit;

(44) module with sensor and / or actuator with interconnection via digital bus of type CAN;

(45) module with sensor and / or actuator with interconnection via digital bus type LIN.

Figure 1 - Representation of a state-of-the-art diagnostic sheet, used in a heavy vehicle and the terminals for standardized protocols: positive terminal of the specific Bus Line bus for communication according to SAE J1850 (36), negative terminal of the Bus bus Specific line for communication according to SAE J1850 (37) K Line / L bus Specific line for communication according to ISO9141-2 and ISO14230-4 (34) (35) and the diagnostic CAN bus for communication according to ISO15765- 4, SAE J1979 and SAE J1939 (20) (21). The OBD / OBDII plug also has the power terminals: battery / chassis ground (18), instrumentation ground (19) and battery positive / 19 (22). All other terminals (38) are not standardized and their use is specific to the manufacturer and the vehicle in question. In the case of light vehicles, the OBD / OBDII plug differs by the shape of the central slot (A) (without separator) and the voltage available at the positive battery terminal (12V).

Figure 2 - representation of a digital communication bus in state-of-the-art vehicles: electronic control unit (39) with connection to two different buses, CAN-type communication bus (40) exclusive for the instrument panel (31) vehicle, digital communication bus (41) for in-vehicle entertainment systems, such as auxiliary, multimedia and convenience systems (33), CAN-type digital communication bus between a sensor module and / or actuator and a unit vehicle electronic control device (42), LIN (Local Interconnect Network) digital communication bus for interconnecting sensors and actuators to an electronic control unit (43), module with sensor and / or actuator with interconnection via digital bus type CAN (44) and module with sensor and / or actuator with interconnection via digital bus type LIN (45). The CAN bus dedicated to systems related to vehicle motorization (23) connects critical systems such as the electronic units of the propulsion engine (27), the transmission and gearbox system (28) and braking system (29) , among some others. This bus is the most critical, considering the necessary data transmission rates, the response times and the action of the messages transmitted on the operation of the vehicle. The second CAN bus (25) with the lowest data transmission rate interconnects most non-critical systems, associated with vehicle comfort and instrumentation (32), examples are air conditioning, lighting, alarm and air conditioning systems. central door lock. As a rule, simpler local buses of the SPI type (43) are used to interconnect the electronic control units of these systems to the respective sensors and actuators. There may also be electronic control units (39) that connect to more than one vehicle bus. The specific busbars (40) (41) are used for connection to the instrument panel (31) and for connection to auxiliary, multimedia and convenience systems (33). The electronic coordination unit or connection bridge (26) present in the diagnostic bus is also represented, it interconnects between the different digital buses present in the vehicle.

Figure 3 - Schematic and simple representation of the present invention, where the connections between the electronic device (1) for communication, control and data acquisition with connection to the vehicle (2) are perceived, which is carried out by its universal diagnostic port. type OBD / OBDII (3).

Figure 4 - representation in detail of the different constituent components of the main parts of the present invention:

• electronic device (1), in which the microcontroller (5) is integrated, first interface for communication with digital bus of type CAN (6), second interface for communication with digital bus of type CAN (7), regulation and management module supply voltage (8), interface for connection with external wired devices (9), plug for external devices (10), module for / 19 connection with external wireless devices (10), physical user interface ( 11), local monitor for viewing and configuring control parameters and acquired data (12), interface module for non-volatile memory device (13), connection for removable non-volatile memory device (14), • type plug OBD / OBDII (3), which has a CAN_H terminal for access to the vehicle's motorization bus (16), CAN_L terminal for access to the vehicle's motorization bus (17), specific terminal for for vehicle mass (18), specific terminal for vehicle instrumentation mass (19), specific CAN_H terminal for the diagnostic CAN bus (20), specific CAN_L terminal for the diagnostic CAN bus (21) and specific terminal for the vehicle battery positive (22); and • specific cable (4).

Figure 5 - Representation of digital communication buses in a vehicle (2) and their connection to the OBD / OBDII plug (3) with the minimum connections required for the system (1): digital communication bus associated with the driving system (23), with connection between critical vehicle systems at a high data transmission rate (23), digital communication bus associated (24) with the electronic coordination unit (26) and with the vehicle's auxiliary and convenience systems (33), bus digital communication system (25) for comfort systems (33) and instrumentation (31), electronic coordination unit (26) and / or bridge connecting the interface between the various digital buses present in the vehicle, electronic unit / 19 that manages the operation of the vehicle's propulsion engine (27), electronic unit that manages the operation of the vehicle's transmission system and gearbox (28), electronic unit that manages the function operation of the electromechanical braking system of the vehicle (29), electronic management unit present in the vehicle's motorization bus (30), instrument panel and vehicle control (31), electronic control unit present in the comfort bus (32) ) and instrumentation (31) and electronic control unit (26) present in the diagnostic bus, auxiliary, entertainment and convenience systems (33).

The description of the figures presented with the present patent application should not be interpreted as limiting the scope of protection of the claims presented.

SUMMARY OF THE INVENTION

The present invention relates to a system capable of communicating with the vehicle's motorization bus (2) and its control units:

• fur any less an unity electronics what generate O operation of engine of propulsion of vehicle (27 ); • fur any less an unity electronics what generate O operation of system transmission and Cashier in

vehicle speeds (28);

• at least one electronic unit that manages the operation of the vehicle's electromechanical braking system (29); and • other electronic management units present on the vehicle's motorization bus (30).

/ 19 The proposed system is capable of replicating and replacing critical and vehicle control systems (example: cruise control system) and, thus, sending messages that allow to control the status of critical control units in the operation of the vehicle ( example: control vehicle speed).

The present invention through the electronic device (1) can carry out the autonomous control of the vehicle (single use of the device (1)) or serve as an interface for other systems and / or computers, by wired connection (9) (10) and / or wireless (15), thus allowing the easy implementation of autonomous driving systems, vehicle control systems and engine control systems for automatic power bank tests, among others. The addition of a second CAN bus in the present invention allows the acquisition of a wide range of variables and the optimization of data acquisition frequencies, which provides a more detailed study / knowledge of the functioning of the vehicle's components and systems and their condition wear. The acquired variables can be stored locally in a non-volatile memory (13) (14) or transmitted via a wired (9) (10) or wireless (15) link.

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to a communication, control and data acquisition system for motor vehicles (2), in which the connection to the vehicle is made through the electronic device (1) with connection to the OBD / OBDII type diagnostic port. (3). In the diagnostic port / 19 of the OBD / OBDII type (3) the connection to the digital communication bus associated with the driving system is added, the bus identified by the reference number (23), present in the vehicle. For this purpose, two free terminals were selected in the respective connector (16) (17), and any other two terminals of all that are available and free (38) can be used.

To achieve the objective of the present invention, the electronic device (1) has in its constitution, the following essential technical characteristics:

• microcontroller (5), in its central part, which includes the Random Access Memory (RAM), the operating code of the embedded system (firmware), several digital communication peripherals, such as Serial Interface for Peripheral (SPI). Serial Peripheral Interface), Communication between Integrated Circuits (I2C of English Inter-Integrated Circuit) and Universal series ports ((USART) of the English Universal Synchronous Asynchronous Receiver Transmitter), and two CAN buses;

• two CAN adapters (transceivers) (6) (7), one for each CAN bus, which convert the digital signals present in the microcontroller outputs (5), between OV and 3.3V, at the voltage levels required in the CAN_H lines and CAN_L of the CAN buses;

• device voltage regulation and management module (8) (1), which converts the battery voltage, coming from the power terminal (22) of the OBD / OBDII port (3), into the working voltages required to operation of the device, between 3.3V and 5V and automatic selection of the device's power supply (1) and, in the event of a power failure via the OBD / OBDII / 19 port (3), allows power supply via the serial port (10) ;

interface circuit for connection to external wired devices (9) (10), which allows the connection between the microcontroller (5) and other devices (embedded systems and / or computers) via a serial bus of the type Memory Device (USB English Universal Serial Bus);

module for connection with external wireless devices (15), allows connection to external devices, analogous to wired connection (9) (10), but using wireless communication networks and protocols (examples: Bluetoth, XBee, WiFi, GSM, RF, etc.);

physical user interface (11), preferably implemented by a joystick and selection buttons, and a local monitor (12) that allow visualization and local implementation of vehicle function control, without the need for embedded systems and / or external computers;

additionally and in order to save the operating data, when the device (1) operates isolated, in vehicle data acquisition mode (2), it has the interface module for a device with non-volatile memory (13) and the connection removable non-volatile memory device (14) that allows data to be saved in a file for later export and / or analysis. As a non-volatile removable memory, the device (1) uses a secure micro digital (SD digital security) memory card,

however, other memoirs like card SD or a device memory removable (USB) can be used.

/ 19

The present invention, when in operating mode for the local implementation of vehicle function control, without the need for embedded systems and / or external computers, and depending on the selection of the quantity to be controlled and the respective value generates the respective message CAN by the microcontroller (5) and sends it to the vehicle's motorization bus (23). The physical user interface (11) and the local monitor (12) can be combined into a display with capacitive or resistive digitizer (touch input).

In turn, when the system is in operation connected to an external system, it receives a message (set of bytes that can be viewed using its ASCII code representation via wired (9) or wireless (15) modules. ) which can represent a control order for one of the vehicle's electronic control units (2) or a request for vehicle operating data:

• if it is a control message, the microcontroller (5) generates a CAN message with the required ID (identifier) and data field, according to the configured vehicle and required command, and sends it to the connected CAN bus the vehicle's CAN bus (23);

• in the case of a message requesting vehicle operating data, the microcontroller (5) responds by sending a message to the external system, with the latest operating data acquired on the two CAN buses (23) (24).

/ 19

With regard to data acquisition, depending on the vehicle (2) or the selected acquisition mode (that is, depending on the communication protocol available in the vehicle control units), the microcontroller (5) activates the filters with the CAN message addresses with the variables to be acquired, thus automating the reception of messages automatically transmitted (broadcasted) on the diagnostic (26) and motorization (23) CAN buses.

The variables to be acquired based on a question and answer protocol (example: SAE J1979) are obtained by the microcontroller (5) with the sending of the respective data request message and by the consequent decoding of the response message verified on the respective bus. The measurement of the vehicle's operating variables acquired from the CAN communication buses (diagnostic or motorized) and the reading mode (broadcasted or by question / answer) is done in order to optimize the acquisition frequency of all the acquired variables.

As will be apparent to a person skilled in the art, the present invention should not be limited to the embodiment described in the present document, being possible several changes that remain within the scope of the present invention.

Of course, the preferred mode presented above, with regard to the number of components / the type of component / of the connections to be used are combinable, in the different possible ways, avoiding the repetition of all these combinations here.

Claims (16)

1. Communication, control and data acquisition system for motor vehicles (2) in which the connection to the vehicle is made through the electronic device (1) with connection to the OBD / OBDII type diagnostic port (3) characterized by a) the electronic device (1) consists of: • at least one microcontroller (5); • interface for communication with CAN-type digital bus (6) associated with the CAN bus (23) dedicated to systems related to vehicle motorization; • at least one interface for communication with a CAN-type digital bus (7) associated with the electronic coordination unit (26) dedicated to the diagnostic bus; • at least one food regulation and management module (8); • at least one interface for wired connection (9) (10) with external devices and / or at least one interface for wireless connection (15) with external devices; • at least one physical user interface (11); • at least one monitor (12); • at least one module for connection with external wireless devices (15); b) the OBD / OBDII diagnostic port (3) has at least one connection to the digital communication bus (23) associated with the driving system, via the CAN_H terminal to access the motor bus 1/5 of the vehicle (16) and CAN_L terminal for access to the vehicle's motorization bus (17) and at least two available terminals (38). System according to claim 1, characterized in that the device (1) has at least one interface module for a device with non-volatile memory (13) and the connection for a removable non-volatile memory device (14). System according to the previous claim, characterized in that the device (1) the interface module for a device with non-volatile memory (13) is of the micro SD, SD, micro SDHC, SDHC, MMC, MMC micro, memory card type , removable memory device, USB hard drive, or other. 4. System according to the preceding claims, characterized in that the physical user interface (11) and the local monitor (12) can be combined in a display with capacitive or resistive digitizer. 5. System according to the preceding claims, characterized in that the physical user interface (11) is implemented, using a joystick and selection buttons. 6. System according to the preceding claims, characterized in that the device's voltage regulation and management module (8) converts the battery voltage from the specific terminal to the vehicle battery positive (22) of the door OBD / OBDII (3) at working voltages between 3.3V and 5V. 2/5 7. System according to the previous claims, characterized in that the interfaces for communication with digital bus of the CAN type (6) (7) convert the digital signals in the outputs of the microcontroller (5) in the voltage levels, between OV and 3.3V, in the CAN_H and CAN_L lines of the CAN buses (20) (21). 8. System according to the preceding claims, characterized in that the module for connection with external wireless devices (15) uses networks and wireless communication protocols such as Bluetoth, XBee, WiFi, GSM, RF. 9. System according to the preceding claims, characterized in that the OBD / OBDII type diagnostic port (3) central slot, for fitting, compatible with light vehicles and or heavy vehicles. System according to the preceding claims, characterized in that the electronic device (1) can directly connect the vehicle's OBD / OBDII plug (3) or via cable (4) for connection to the vehicle's OBD / OBDII port (3). 11. System according to the preceding claims, characterized in that it is supplied via an interface for connection with external wired devices (10). 12. System according to the previous claims characterized by CAN, CAN type interface interfaces FD, FlexRay, LIN, K / L Line, or other. 3/5 13. Method for replicating and / or replacing the electronic control and coordination systems present on the bus of the driving system of a vehicle, implemented by the system (1) described in claims 1 to 12 characterized by: a) generation of CAN message by the microcontroller (5) according to the user's configuration (11) and sending to the CAN bus (23) dedicated to systems related to the vehicle's motorization; b) presentation of the controlled variables on the display device (12). 14. Method for acquiring vehicle operating data locally and autonomously, implemented by the system (1) described in claims 1 to 12, characterized by: a) generation of CAN message by the microcontroller (5) according to the vehicle to be monitored. Sending messages to the diagnostic bus (24) and / or CAN bus (23); b) automatic selection of the protocols to be used in data acquisition. Interpreting broadcast messages on the buses, ordering data (by question and answer protocols) or a combination of the two; c) presentation of vehicle operating variables on the display device (12), according to the user's selection through the respective interface (11); d) Storage of the acquired variables in the non-volatile memory device connected to the connection for removable non-volatile memory device (14). 4/5 15. Method according to the previous claims, characterized in that the communication system (1) can be connected to an external system, characterized by: a) automatic selection of the device supply (1); b) reception via the wired (9) (10) and / or wireless (15) control message modules for one of the vehicle's electronic control units (2) or a vehicle operating data request ( 2), with high acquisition frequency: • if a control message, the microcontroller (5) generates a CAN message with the identifier and data field and sends it to the CAN bus connected to the vehicle's CAN bus (23); • if requested for vehicle operating data, the microcontroller (5) sends a message to the external system with the operating data acquired on the two CAN buses (23) (24); 16. Method according to the previous claims, characterized in that the microcontroller (5) activates the filters with the addresses of the CAN messages with the variables to be acquired, automating the reception of the messages automatically transmitted in the diagnostic (26) and motorization CAN (bus) 23) and the response messages to the questions asked.