CN108052095A - A kind of automotive diagnostic system and automobile - Google Patents

Abstract

The invention provides an automobile diagnosis system and automobile, and relates to the technical field of automobile fault diagnosis. The automobile diagnosis system includes: a gateway controller; an OBD interface connected to the gateway controller through a first line and a second line; the first line is provided with relay, and the relay is also connected to the component controller of the car; the gateway controller controls the relay to be in the first state or the second state through the first line; when the relay is in the first state, the OBD interface is connected to the line between the component controller, Diagnosis data transmission is directly performed between the OBD interface and the component controller; when the relay is in the second state, the diagnostic data between the OBD interface and the component controller is forwarded by the gateway controller through the second line. The scheme of the present invention avoids data acquisition through lead wires during fault diagnosis, and also avoids the OBD interface being directly connected to all network segments of the vehicle, thereby improving data security of the vehicle and reducing potential safety hazards of the vehicle.

Description

A kind of automobile diagnosis system and automobile

technical field

The invention belongs to the technical field of automobile fault diagnosis, and in particular relates to an automobile diagnosis system and an automobile.

Background technique

With the rapid development of automobile technology, people have higher requirements for the safety and reliability of automobiles. The failure of the electronic control system inside the car will not only affect the normal operation of the car, but even cause safety accidents. In order to ensure the safety of the car and reduce the probability of accidents to a controllable range, the realization of the diagnostic system of the automotive electronic control system is becoming more and more important. The On-Board Diagnostic (OBD) interface is used as a diagnostic device and The channel for vehicle interactive diagnostic data, its realization mechanism is particularly important. The traditional diagnostic interface is directly connected to all network segments of the vehicle, and diagnostic data and network communication data can be read directly through the diagnostic interface, which cannot effectively guarantee the safety of vehicle data; another commonly used diagnostic interface, through the gateway controller and The whole vehicle is connected to the network, and the gateway controller forwards the diagnostic data between the diagnostic equipment and the vehicle controller. The network communication data destroys the wiring harness of the vehicle, causing a safety hazard to the vehicle.

Contents of the invention

The purpose of the embodiment of the present invention is to provide a car diagnostic system and a car, so as to solve the problem that the safety of the whole car data cannot be effectively guaranteed in the prior art, and the safety hazards of the whole car are caused by the technical personnel obtaining the network communication data through the lead wire The problem.

In order to achieve the above object, an embodiment of the present invention provides a vehicle diagnostic system, including:

gateway controller;

On-board diagnostic system OBD interface, the gateway controller is connected to the OBD interface through the first line and the second line respectively;

Wherein, a relay is provided on the first circuit, and the relay is also connected to the component controller of the automobile;

The gateway controller is used to control the relay to be in the first state or the second state through the first line; wherein when the relay is in the first state, the line between the OBD interface and the component controller is connected, so Diagnosis data transmission is directly performed between the OBD interface and the component controller; when the relay is in the second state, the diagnostic data between the OBD interface and the component controller passes through the second line and is controlled by the gateway forwarder.

Wherein, the output end of the gateway controller is connected to the control end of the relay of the first line through a hard line; when the gateway controller receives the data representing the diagnostic mode through the second line, the gateway The controller controls the relay to switch from the second state to the first state, and when the gateway controller receives data representing a non-diagnostic mode through the second line, the gateway controller controls the relay to switch from the first state to the first state. The state switches to the second state.

Wherein, the component controller includes at least one of an instrument controller and a vehicle body controller.

Wherein, the relay includes a first relay and a second relay, wherein the first terminal of the first relay, the first terminal of the second relay, the first terminal of the instrument controller and the gateway controller The CAN communication end is connected through the CAN bus, and the second end of the first relay and the second end of the second relay are respectively connected to the OBD interface; when the first relay and the second relay are in the first state, the first terminal of the first relay communicates with the second terminal of the first relay, and the first terminal of the second relay communicates with the second terminal of the second relay.

Wherein, the relay also includes a third relay and a fourth relay, the first end of the third relay, the first end of the fourth relay, the second CAN of the vehicle body controller and the gateway controller The communication end is connected through the CAN bus, the second end of the third relay and the second end of the fourth relay are respectively connected to the OBD interface, when the third relay and the fourth relay are in the first state , the first terminal of the third relay communicates with the second terminal of the third relay, and the first terminal of the fourth relay communicates with the second terminal of the fourth relay.

Wherein, when the relay is in the first state, the communication data is directly transmitted between the component controller and the OBD interface.

Wherein, an engine controller is also included, and the engine controller is connected to the third CAN communication terminal of the gateway controller through a CAN bus.

Wherein, the diagnostic data between the OBD interface and the engine controller is forwarded by the gateway controller via the second line.

Wherein, when the relay is in the first state, the communication data between the OBD interface and the engine controller is forwarded by the gateway controller via the second line.

An embodiment of the present invention also provides an automobile, including the above-mentioned automobile diagnosis system.

The technical solution of the present invention has at least the following beneficial effects:

In the embodiment of the present invention, by connecting the first line including the relay between the gateway controller and the OBD interface, it is realized that when performing fault diagnosis, the component controller of the automobile is directly connected to the OBD interface, so that the components connected to the OBD interface The diagnostic equipment can directly read the diagnostic data and communication data of each network segment of the vehicle, which ensures the security of the vehicle data, and enables technicians to easily and conveniently obtain the network communication data and diagnostic data of the vehicle, avoiding the need to use leads. Obtaining data leads to potential safety hazards in the entire vehicle.

Description of drawings

FIG. 1 is a schematic diagram of a vehicle diagnostic system according to an embodiment of the present invention.

Explanation of reference signs:

1-gateway controller, 2-OBD interface, 3-instrument controller, 4-engine controller, 5-body controller, 6-power supply, K1-first relay, K2-second relay, K3-third Relay, K4 - fourth relay.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

The embodiment of the present invention aims at the problem that the safety of the whole vehicle data cannot be effectively guaranteed in the prior art and the technical personnel obtain the network communication data through the lead wire, which leads to the problem that the whole vehicle has potential safety hazards, and provides an automobile diagnosis system and the automobile, so as to provide The technicians reserve a data reading channel to facilitate fault troubleshooting in the vehicle development and after-sales stages, and provide guarantee for the safety of the vehicle.

As shown in Fig. 1, an embodiment of the present invention provides a kind of automobile diagnosis system, comprises:

gateway controller 1;

On-board diagnostic system OBD interface 2, the gateway controller 1 is connected to the OBD interface 2 through the first line and the second line respectively;

Wherein, a relay is provided on the first circuit, and the relay is also connected to the component controller of the automobile;

The gateway controller 1 is used to control the relay to be in the first state or the second state through the first line; wherein when the relay is in the first state, the line between the OBD interface 2 and the component controller connected, the diagnostic data transmission is directly performed between the OBD interface 2 and the component controller; when the relay is in the second state, the diagnostic data between the OBD interface 2 and the component controller passes through the second Line, forwarded through gateway controller 1.

In the above embodiments of the present invention, by setting the relay, it is possible to transmit data between the component controller and the OBD interface 2 through different lines in the diagnosis mode and the non-diagnosis mode. Wherein, when in the non-diagnostic mode, the gateway controller 1 processes all received data sent by the component controllers to obtain diagnostic data, and sends the diagnostic data to the Describe the OBD interface 2. When in the diagnosis mode, the gateway controller 1 controls the relays to be in the first state, thereby realizing direct data transmission between each of the component controllers and the OBD interface 2, ensuring the integrity of vehicle data safety. Specifically, the data transmitted at this time includes communication data and diagnostic data, and the diagnostic device connected to the OBD interface 2 judges the cause of the fault according to the communication data and the diagnostic data.

Here, it should be noted that the first state of the relay is that the movable contact of the relay communicates with the normally open contact, that is, the coil in the relay is energized, and the movable contact is attracted to the normally open contact. The point is connected; the second state of the relay is that the movable contact of the relay is connected with the normally closed contact, that is, the coil in the relay is not energized, and the movable contact is connected with the normally closed contact.

Wherein, the output end of the gateway controller 1 is connected to the control end of the relay of the first line through a hard line; when the gateway controller 1 receives the data representing the diagnostic mode through the second line, the The gateway controller 1 controls the relay to switch from the second state to the first state, when the gateway controller 1 receives data representing a non-diagnostic mode through the second line, the gateway controller 1 controls the relay The relay is switched from the first state to the second state.

In order to further ensure the safety of the whole vehicle data, during the fault diagnosis process of the car, the technician first connects the diagnostic equipment to the OBD interface 2, and then, the gateway controller 1 and the diagnostic equipment pass through the The second circuit performs security verification. When the two security verifications are successful, the diagnostic device sends data representing the diagnostic mode to the gateway controller 1, and the gateway controller 1 controls its output terminal to output an active level to the The control terminal of the relay, so that the relay is in the first state, the movable contact is connected with the normally open contact; when the safety verification of the two fails or the verification is timed out, the gateway controller 1 controls its output terminal Outputting an invalid level to the control terminal of the relay, so that the relay is in the second state, and the movable contact communicates with the normally closed contact. Wherein, the control terminal of the relay is the second terminal of the coil of the relay.

Specifically, the component controllers include at least one of an instrument controller 3 and a vehicle body controller 5 . Wherein, the instrument controller 3 is connected to two relays in the first circuit, and the vehicle body controller 5 is connected to the other two relays in the first circuit.

Wherein, the first end of the first relay K1, the first end of the second relay K2, the instrument controller 3 and the first CAN communication end of the gateway controller 1 are connected through a CAN bus, and the The second end of the first relay K1 and the second end of the second relay K2 are respectively connected to the OBD interface 2; when the first relay K1 and the second relay K2 are in the first state, the The first terminal of the first relay K1 communicates with the second terminal of the first relay K1, and the first terminal of the second relay K2 communicates with the second terminal of the second relay K2. Therefore, in the diagnosis mode, the meter controller 3 is connected to the OBD interface 2 through the first relay K1 and the second relay K2 and directly performs data transmission. Wherein, the first end is a normally open contact of the relay, and the second end is a moving contact of the relay.

Wherein, the first end of the third relay K3, the first end of the fourth relay K4, the vehicle body controller 5 and the second CAN communication end of the gateway controller 1 are connected through a CAN bus, and the The second end of the third relay K3 and the second end of the fourth relay K4 are respectively connected to the OBD interface 2, when the third relay K3 and the fourth relay K4 are in the first state, the The first terminal of the third relay K3 communicates with the second terminal of the third relay K3, and the first terminal of the fourth relay K4 communicates with the second terminal of the fourth relay K4. In this way, in the diagnostic mode, the instrument controller 3 is connected to the OBD interface 2 through the third relay K3 and the fourth relay K4 and directly performs data transmission, wherein the first end is the relay's The normally open contact, the second end is the moving contact of the relay.

Further, when the relay is in the first state, the communication data is directly transmitted between the component controller and the OBD interface 2 . Making the diagnostic equipment connected to the OBD interface 2 perform fault diagnosis on the component controller according to the communication data and the diagnostic data, and determine the cause of the fault.

In the embodiment of the present invention, by setting the relay, the diagnostic equipment can directly obtain the communication data and diagnostic data of the component controller through the OBD interface 2, which prevents the technician from obtaining the network communication data through the lead wire and destroying the wiring harness of the vehicle , causing safety hazards to the vehicle; at the same time, it also solves the problem that the diagnostic interface in the prior art is directly connected to all network segments of the vehicle, resulting in the inability to effectively guarantee the security of vehicle data.

Wherein, the vehicle diagnostic system of the embodiment of the present invention further includes an engine controller 4, and the engine controller 4 is connected to the third CAN communication terminal of the gateway controller 1 through a CAN bus. In the non-diagnostic mode, the diagnostic data between the OBD interface 2 and the engine controller 4 is transmitted through the gateway controller 1 via the second line. In the diagnosis mode, that is, when the relay of the first line is in the first state, the communication data and diagnosis data between the OBD interface 2 and the engine controller 4 all pass through the second line and pass through the gateway Controller 1 forwards.

In summary, when the vehicle diagnostic system is in the non-diagnostic mode, the gateway controller 1 receives the transmission from at least one of the instrument controller 3, the engine controller 4 and the vehicle body controller 5 through the CAN bus. diagnosis data and communication data, and process the received data, obtain the diagnosis data sent by the instrument controller 3, the engine controller 4 and the body controller 5, and send them through the second line To the OBD interface 2; when the vehicle diagnostic system is in the diagnostic mode, the gateway controller 1 controls its output terminal to output an active level to the relay, and controls the relay to be in the first state, so that the instrument controller 3 and the vehicle body controller 5 are respectively connected to the OBD interface 2, and directly transmit diagnostic data and communication data; the engine controller 4 is connected to the OBD interface through the gateway controller 1 and the second line 2 connection, and directly transmit diagnostic data and communication data.

Specifically, as shown in FIG. 1, the first end of the coil of the first relay K1, the first end of the coil of the second relay K2, the first end of the coil of the third relay K3 and the The first end of the coil of the fourth relay K4 is respectively connected to the power supply 6; the gateway controller 1 includes two output ends, wherein the first output end is connected to the second end of the coil of the first relay K1 and the The second end of the coil of the second relay K2 is connected, and the second output end is connected with the second end of the coil of the third relay K3 and the second end of the coil of the fourth relay K4. When the gateway controller 1 receives the data representing the diagnostic mode, the gateway controller 1 controls the first output terminal and the second output terminal to output a low level, so that the coils of each relay are energized, so that The relay is in a first state where the movable contact communicates with the normally open contact.

Here, it should be noted that when the gateway controller 1 receives the data representing the meter diagnosis mode, the gateway controller 1 controls the first output terminal to output a low level, so that the first relay K1 and The second relay K2 is switched to the first state; similarly, when the gateway controller 1 receives data representing the vehicle body diagnosis mode, the gateway controller 1 controls the second output terminal to output a low level, Make the third relay K3 and the fourth relay K4 switch to the first state; when the gateway controller 1 receives data representing the engine diagnosis mode, the gateway controller 1 controls the third CAN communication The terminal communicates with the second line.

An embodiment of the present invention also provides an automobile, including the above-mentioned automobile diagnosis system.

Correspondingly, since the automobile diagnosis system of the embodiment of the present invention is applied to automobiles, the embodiment of the present invention also provides an automobile diagnosis system, wherein the implementation examples of the above automobile diagnosis system are applicable to the embodiment of the automobile , the same technical effect can also be achieved.

The above description is a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, these improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (10)

1. A vehicle diagnostic system, characterized in that, comprising: gateway controller; On-board diagnostic system OBD interface, the gateway controller is connected to the OBD interface through the first line and the second line respectively; Wherein, a relay is provided on the first circuit, and the relay is also connected to the component controller of the automobile; The gateway controller is used to control the relay to be in the first state or the second state through the first line; wherein when the relay is in the first state, the line between the OBD interface and the component controller is connected, so Diagnosis data transmission is directly performed between the OBD interface and the component controller; when the relay is in the second state, the diagnostic data between the OBD interface and the component controller passes through the second line and is controlled by the gateway forwarder. 2. The vehicle diagnostic system according to claim 1, wherein the output terminal of the gateway controller is connected to the control terminal of the relay of the first circuit through a hard wire; when the gateway controller passes through the When the second line receives the data representing the diagnostic mode, the gateway controller controls the relay to switch from the second state to the first state; when the gateway controller receives the data representing the non-diagnostic mode through the second line data, the gateway controller controls the relay to switch from the first state to the second state. 3. The vehicle diagnostic system according to claim 1, wherein the component controller comprises at least one of an instrument controller and a body controller. 4. The vehicle diagnostic system according to claim 3, wherein the relay comprises a first relay and a second relay, wherein the first end of the first relay and the first end of the second relay , the instrument controller and the first CAN communication end of the gateway controller are connected through a CAN bus, and the second end of the first relay and the second end of the second relay are respectively connected to the OBD interface; When the first relay and the second relay are in the first state, the first end of the first relay communicates with the second end of the first relay, and the first end of the second relay communicates with the second end of the first relay. The second end of the second relay is connected. 5. The vehicle diagnostic system according to claim 4, wherein the relay further comprises a third relay and a fourth relay, the first end of the third relay, the first end of the fourth relay, The second CAN communication end of the vehicle body controller and the gateway controller is connected through a CAN bus, and the second end of the third relay and the second end of the fourth relay are respectively connected to the OBD interface. When the third relay and the fourth relay are in the first state, the first end of the third relay communicates with the second end of the third relay, and the first end of the fourth relay communicates with the second end of the third relay. The second end of the fourth relay is connected. 6 . The vehicle diagnostic system according to claim 1 , wherein when the relay is in the first state, communication data is directly transmitted between the component controller and the OBD interface. 7. The vehicle diagnostic system according to claim 1, further comprising an engine controller, the engine controller is connected to the third CAN communication terminal of the gateway controller through a CAN bus. 8. The vehicle diagnostic system according to claim 7, wherein the diagnostic data between the OBD interface and the engine controller is forwarded by the gateway controller via the second line. 9. The vehicle diagnostic system according to claim 7, characterized in that, when the relay is in the first state, the communication data between the OBD interface and the engine controller passes through the second line, Forwarded by gateway controller. 10. An automobile, characterized by comprising the automobile diagnostic system according to any one of claims 1-9.