Diagnostic bus jumper for vehicles

Abstract

This invention discloses a diagnostic bus shorting device for vehicles. This invention enables the shorting device to not only function as a connection point but also to transmit fault data and provide auxiliary analysis. Specifically, the diagnostic bus shorting device includes several hardware interfaces and corresponding control components. Each control component in the vehicle is connected to the control components via wiring harnesses and hardware interfaces. The bus shorting device is connected to the central gateway and the diagnostic interface. The bus shorting device is used to independently and in real-time detect all bus connection nodes, and upon detecting an anomaly, sends fault data to the central gateway and / or the diagnostic interface. This invention enables independent and real-time monitoring of the bus status of each connected component (e.g., the vehicle controller), and provides feedback through the gateway and diagnostic interface for preliminary analysis of bus fault modes. In particular, this invention can be extended to various scenarios such as shared power, shared ground, and shared signal in vehicles.

Description

Technical Field

[0001] This invention relates to the field of automotive electrical components technology, and more particularly to a diagnostic bus shorting device for vehicles. Background Technology

[0002] As automotive products become increasingly technologically advanced, the number of controllers in vehicles is growing, leading to denser bus communication between them and a greater prevalence of shared power, ground, bus, and signal connections. Automotive vehicles typically use ultrasonic welding for internal connections or jumpers for these connections. Due to the difficulty of maintenance associated with internal connections, jumpers are the mainstream method of use.

[0003] Currently used jumpers consist of a standard sheath and a jumper cap, lacking detection, analysis, and processing capabilities. When a faulty internal current occurs at a node, or when a wiring harness circuit experiences an open circuit or short circuit, a chain reaction can occur, causing a number of electrical components to malfunction, affecting the entire vehicle's operation, and potentially even causing the vehicle to stall while driving, posing a significant hazard. Taking current bus jumpers as an example, they only function as connection points, resulting in the following problems: they lack detection capabilities, making real-time monitoring impossible; they lack diagnostic and fault message transmission capabilities, failing to alert vehicle owners or guide after-sales maintenance; and they lack fault analysis and processing capabilities, unable to prevent faulty nodes from interfering with the entire network segment. Summary of the Invention

[0004] In view of the above, the present invention aims to provide a diagnostic bus jumper for vehicles to solve the problem that current bus jumpers are difficult to use for fault analysis, diagnosis and feedback processing.

[0005] The technical solution adopted in this invention is as follows:

[0006] The present invention provides a diagnostic bus shorting device for a vehicle, including a plurality of hardware interfaces and corresponding control components; components in the vehicle involved in bus connections are connected to the control components via wiring harnesses and the hardware interfaces;

[0007] The bus shorting device is connected to the central gateway and the diagnostic interface respectively;

[0008] The bus shorting device is used to independently and in real time detect all bus connection nodes, and after detecting an anomaly, it sends fault data to the central gateway and / or the diagnostic interface.

[0009] In at least one possible implementation, the bus shorting device detects the bus voltage values ​​of each connected component.

[0010] In at least one possible implementation, after detecting an abnormal bus voltage, the bus shorting device determines the fault type of the component connected to the bus based on the current voltage value, the fault type including short circuit, open circuit, or internal current leakage within the component.

[0011] In at least one of the possible implementations, the bus shorting device is connected to an external diagnostic device via the diagnostic interface.

[0012] In at least one possible implementation, the bus shorting device is connected to the vehicle remote terminal via the central gateway, and is used to send fault information to the user's mobile terminal via the vehicle remote terminal.

[0013] In at least one of the possible implementations, the bus shorting device forwards fault information to the combination instrument via the central gateway.

[0014] In at least one possible implementation, the bus shorting device saves fault data of the detected abnormal component.

[0015] In at least one of the possible implementations, the harness is a public bus or a private bus.

[0016] In at least one of the possible implementations, the bus shorting device is configured with an importance classification of each connected component according to a preset vehicle safety driving standard, and is used to execute a predetermined bus shielding strategy based on the frequency of anomalies.

[0017] In at least one possible implementation, the bus masking strategy includes:

[0018] When the frequency of bus malfunctions in a component is high and the component's communication does not affect the safe operation of the vehicle, the bus short-circuiting device completely shields the component's bus; or,

[0019] When the frequency of bus malfunctions in a component is high and the component's communication is affecting the safe operation of the vehicle, the bus short-circuiting device selectively shields the component's bus.

[0020] Compared with existing technologies, the main design concept of this invention lies in enabling the short-circuit device to not only function as a connection point but also to transmit fault data and perform auxiliary analysis through a built-in controller. Specifically, this diagnostic bus short-circuit device includes several hardware interfaces and corresponding control components. Each control component on the vehicle is connected to the control components via wiring harnesses and hardware interfaces. The bus short-circuit device is connected to the central gateway and diagnostic interface respectively. The bus short-circuit device is used to independently and in real-time detect all bus connection nodes and, upon detecting an anomaly, sends fault data to the central gateway and / or diagnostic interface. This invention achieves independent and real-time monitoring of the bus status of each connected component (e.g., the vehicle controller) and provides feedback through the gateway and diagnostic interface for preliminary analysis of bus fault modes. Furthermore, this invention can be extended to various scenarios such as shared power, shared ground, and shared signal in automobiles. Attached Figure Description

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described below with reference to the accompanying drawings, wherein:

[0022] Figure 1 This is a schematic diagram of a diagnostic bus shorting device for vehicles provided in an embodiment of the present invention. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] This invention proposes an embodiment of a diagnostic bus shorting device for vehicles, specifically, as follows: Figure 1 As shown, specifically, the bus shorting device 1 includes several hardware interfaces 2 and corresponding control components 3 (which may be MCUs customized according to the required functions, such as but not limited to STM32). The control components 3 can be interconnected to ensure basic connection point functions (see the implementation examples below for other functions). The components 4 on the vehicle involved in bus connection are connected to the control components 3 through the hardware interfaces 2 via the wiring harness 7. The bus shorting device 1 is connected to the central gateway 8 and the diagnostic interface 9 respectively, so that it can interact with vehicle devices on other network segments through the central gateway 8 and can be directly connected to peripherals.

[0025] The bus shorting device 1 is used to independently detect all bus connection nodes (including the central gateway 8) (the specific objects to be detected include, but are not limited to, bus voltage, etc.), and after detecting an anomaly, it sends the fault data to the central gateway 8 and / or the diagnostic interface 9 so as to output fault diagnosis information to the outside.

[0026] For example, after the bus of a certain vehicle component 4 (such as the transmission controller) is connected to the bus shorting device 1, the bus shorting device 1 monitors its bus voltage in real time. When an abnormal bus voltage is detected, the fault type of the component connected to the bus can be clearly determined based on its voltage value, such as short circuit (i.e., voltage value is 0V or the vehicle voltage), open circuit (i.e., floating state), or internal leakage current in component 4 (voltage value does not reach the standard high level of the vehicle voltage). Therefore, by analyzing the abnormal bus voltage value and fault frequency, the cause of the fault can be diagnosed. For example, by combining the fault frequency and duration, it can be determined that the fault is caused by poor contact, wiring harness wear, or controller damage.

[0027] Furthermore, it can be added that the bus shorting device 1 can also save the fault data of the abnormal components detected (in actual operation, the abnormal recording function can be implemented by the control component, such as storing the bus voltage data of abnormal voltage), and then send it out through the public bus or private bus (specific implementation of the wiring harness 7).

[0028] For example, the bus shorting device 1 forwards the fault information to the instrument cluster 11 through the central gateway 8. The instrument cluster 11 can remind the car owner through a pop-up window, such as "XX component bus has a short circuit fault" or "XX component bus has an open circuit fault".

[0029] For example, when the diagnostic device 12 is connected to the diagnostic interface 9, it can read specific voltage data, which makes it easy for technicians to directly obtain fault information. This is the fault feedback capability shown in some preferred embodiments. It can not only send fault information to relevant vehicle devices through the bus, but also support reading from the diagnostic interface using external devices, thereby effectively guiding after-sales maintenance and saving maintenance time.

[0030] For example, the bus shorting device 1 is used to connect to the vehicle terminal 10 (such as a vehicle remote module) through the central gateway 8, and is used to send fault information to the user's mobile terminal 13 through the vehicle terminal 10, forming another unobstructed fault feedback channel.

[0031] According to the preset vehicle safety driving standards, the bus short-circuit device 1 (in actual operation, all of the following can be implemented by the control component 3) has an importance classification of each connected node component, and executes a bus shielding strategy in combination with the frequency of abnormal occurrences to prevent abnormal components from affecting the entire network segment.

[0032] In illustrative terms: (1) When the frequency of bus abnormalities in component 4 is low (which can be determined by a preset frequency threshold), the bus short-circuit device 1 does not perform any shielding treatment; (2) When the frequency of bus abnormalities in component 4 is high and the communication of component 4 does not affect the safe operation of the vehicle, the bus short-circuit device 1 completely shields the bus of component 4, that is, it refuses to allow component 4 to access the vehicle bus network through the bus; (3) When the frequency of bus abnormalities in component 4 is high and the communication of component 4 has affected the safe operation of the vehicle, the bus short-circuit device 1 selectively shields the bus of component 4 (such as a bus fault that lasts for a long time). It can also be pointed out that when the fault is cleared, for example, when the bus short-circuit device 1 detects that the bus voltage of component 4 is normal, the bus access of the shielded component 4 is restored.

[0033] In summary, the main design concept of this invention lies in enabling the short-circuit device to not only function as a connection point but also to transmit fault data and perform auxiliary analysis through a built-in control device. Specifically, this diagnostic bus short-circuit device includes several hardware interfaces and corresponding control components. Each control component on the vehicle is connected to the control components via wiring harnesses and hardware interfaces. The bus short-circuit device is connected to the central gateway and diagnostic interface respectively. The bus short-circuit device is used to independently and in real-time detect all bus connection nodes and, upon detecting an anomaly, sends fault data to the central gateway and / or diagnostic interface. This invention achieves independent and real-time monitoring of the bus status of each connected component (e.g., the vehicle controller) and provides feedback through the gateway and diagnostic interface for preliminary analysis of bus fault modes. Furthermore, this invention can be extended to various scenarios such as shared power, shared ground, and shared signal in automobiles.

[0034] In this embodiment of the invention, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent the existence of A alone, A and B simultaneously, or B alone. A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects have an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one of a, b, and c can represent: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, and c can be single or multiple.

[0035] The above description of the structure, features, and effects of the present invention is based on the embodiments shown in the figures. However, the above are only preferred embodiments of the present invention. It should be noted that the technical features involved in the above embodiments and their preferred methods can be reasonably combined and matched by those skilled in the art to form a variety of equivalent solutions without departing from or changing the design concept and technical effects of the present invention. Therefore, the present invention is not limited to the scope of implementation shown in the figures. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments, that do not exceed the spirit covered by the specification and figures, should be within the protection scope of the present invention.

Claims

1. A diagnostic bus shorting device for vehicles, characterized in that, It includes several hardware interfaces and corresponding control components; components on the vehicle involving bus connections are connected to the control components via wiring harnesses and the hardware interfaces; The bus shorting device is connected to the central gateway and the diagnostic interface respectively; The bus shorting device is used to independently and in real time detect all bus connection nodes, and after detecting an anomaly, it sends fault data to the central gateway and / or the diagnostic interface. The bus short-circuiting device, based on preset vehicle safety driving standards, has an importance classification for each connected component. It is used to execute a predetermined bus shielding strategy based on the frequency of anomalies, including: When the frequency of bus abnormalities in a component is low, the bus shorting device does not perform any shielding treatment; When the frequency of bus abnormalities of a component is high and the communication of the component does not affect the safe operation of the vehicle, the bus short-circuiting device completely shields the bus of the component to prevent the connection of components with high-frequency abnormalities but no impact on safe operation. When the frequency of bus abnormalities of a component is high and the communication of the component has affected the safe operation of the vehicle, the bus shorting device selectively shields the bus of the component so that the component with high-frequency abnormalities and affecting safe operation is only shielded when a predetermined fault occurs. The predetermined fault includes: the component causing a bus fault with a long duration.

2. The diagnostic bus shorting device for vehicles according to claim 1, characterized in that, The bus shorting device detects the bus voltage values ​​of each connected component.

3. The diagnostic bus shorting device for vehicles according to claim 2, characterized in that, After detecting an abnormal bus voltage, the bus shorting device determines the fault type of the component connected to the bus based on the current voltage value. The fault type includes short circuit, open circuit, or internal current leakage within the component.

4. The diagnostic bus shorting device for vehicles according to claim 1, characterized in that, The bus shorting device is connected to external diagnostic equipment through the diagnostic interface.

5. The diagnostic bus shorting device for vehicles according to claim 1, characterized in that, The bus shorting device is connected to the vehicle-mounted remote terminal through the central gateway and is used to send fault information to the user's mobile terminal via the vehicle-mounted remote terminal.

6. The diagnostic bus shorting device for vehicles according to claim 1, characterized in that, The bus shorting device forwards fault information to the combined instrument via the central gateway.

7. The diagnostic bus shorting device for vehicles according to claim 1, characterized in that, The bus shorting device saves the fault data of the abnormal components detected.

8. The diagnostic bus shorting device for vehicles according to claim 1, characterized in that, The wiring harness is either a public bus or a private bus.

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