A method and system for determining the lighting mode of a hybrid commercial vehicle fault indicator

Abstract

The application discloses a kind of hybrid commercial vehicle fault indicator lighting mode determination method and system, specifically related to commercial vehicle fault monitoring technical field, after power-on, vehicle control unit combines vehicle parameter to distinguish high pressure completion and propulsion system activation state, and is sent to engine control unit by CAN message, engine control unit will this state and the state result based on whether engine starts or operation is calculated.The application under different conditions, vehicle control unit combines vehicle parameter to distinguish high pressure completion and propulsion system activation state, and is sent to engine control unit by CAN message, engine control unit will this state and the state result based on whether engine starts or operation is calculated, and this result is replaced by traditional vehicle to distinguish whether the state parameter of engine starts, so as to realize the judgment of the lighting mode of the fault indicator of hybrid commercial vehicle.

Description

Technical Field

[0001] This invention relates to the field of commercial vehicle fault monitoring technology, and more specifically, to a method and system for determining the illumination mode of a fault indicator in a hybrid commercial vehicle. Background Technology

[0002] To meet the increasingly stringent China VI emission standards for heavy-duty commercial vehicles, fault monitoring strategies are developed for relevant assemblies or components in the aftertreatment system to achieve emission control compliance. When an abnormality occurs in a certain assembly or component of the system, the system will generate a corresponding fault code according to the appropriate strategy and notify the driver of the fault through the fault indicator (MI) on the instrument panel. According to the latest China VI emission standards (GB 17691—2018), the fault indicator (MI) is required to display differently based on the fault category and engine status. The regulations require the fault indicator to display two different situations: key on-engine off and key on-engine on, with different MI activation strategies for each situation. For traditional vehicles, the distinction between on-engine and off-engine states is mainly based on engine speed. When the engine speed is higher than a threshold, it is considered on-engine; when the engine speed is lower than the threshold, it is considered off-engine.

[0003] When a fault occurs, due to the characteristics of hybrid vehicles, there may be situations where the vehicle has started driving with high voltage but the engine has not yet started. Also, during driving, the vehicle's operating mode changes from hybrid mode to pure electric mode, and the engine stops running, causing the MI activation strategy to change and not meet current regulatory requirements. Summary of the Invention

[0004] To overcome the aforementioned deficiencies in the prior art, the present invention provides a method and system for determining the illumination mode of a fault indicator in a hybrid commercial vehicle. The method involves the vehicle control unit combining vehicle parameters to determine the high-voltage completion and propulsion system activation status, and then sending the result to the engine control unit via a CAN message. The engine control unit performs an OR operation on this status with the status result based on whether the engine is started, and uses this result to replace the status parameters for determining whether the engine is started in traditional vehicles, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a method for determining the illumination mode of a fault indicator in a hybrid commercial vehicle, specifically including the following steps:

[0006] After power is applied, the vehicle control unit (VCU) determines the high voltage completion and propulsion system activation (ready / normal) status by combining vehicle parameters, and sends it to the engine control unit (ECU) via CAN message. The engine control unit (ECU) performs an OR operation on this status with the status result based on whether the engine is started, and uses this result to replace the status parameters for determining whether the engine is started in traditional vehicles, thereby realizing the determination of the lighting mode of the fault indicator of hybrid commercial vehicles.

[0007] In a preferred embodiment, a control system for a fault indicator illumination mode of a hybrid commercial vehicle is provided, the system comprising a vehicle control unit module and an engine control unit module;

[0008] The vehicle control unit module is used to determine the completion of high voltage and the activation (ready / normal) status of the propulsion system after the driver applies the high voltage, based on the vehicle parameters, and then send the result to the engine control unit via CAN message.

[0009] The engine control unit module is used to perform an OR operation on the system activation status obtained from the vehicle control unit and the status result based on engine speed to determine whether the engine is running. This result is then used to replace the status parameters used in traditional vehicles to determine engine start-up, thereby enabling the determination of the illumination mode of the fault indicator in the hybrid commercial vehicle. When an engine fault occurs, the instrument panel is controlled based on the determination of the fault indicator's illumination mode to achieve differentiated display.

[0010] In a preferred embodiment, the vehicle control unit module and the engine control unit module are used to collect vehicle parameters, battery parameters, and engine operating status parameters.

[0011] In a preferred embodiment, the vehicle parameters include power battery voltage parameters, power battery current parameters, T15 parameters, and vehicle fault parameters.

[0012] The technical effects and advantages of this invention are as follows:

[0013] Under different operating conditions, the vehicle control unit combines vehicle parameters to determine the high voltage completion and propulsion system activation status, and sends it to the engine control unit via CAN message. The engine control unit performs an OR operation on this status with the status result based on whether the engine is started, and uses this result to replace the status parameters for determining whether the engine is started in traditional vehicles, thereby realizing the determination of the lighting mode of the fault indicator of hybrid commercial vehicles. Attached Figure Description

[0014] Figure 1 This is a flowchart illustrating a method for determining the illumination mode of a fault indicator in a hybrid commercial vehicle, as proposed in this invention.

[0015] Figure 2 The flowchart is for the lighting mode determination system applicable to the present invention.

[0016] The attached diagram is labeled as follows: 1. Vehicle control unit module; 2. Engine control unit module. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Example 1

[0019] Refer to the instruction manual appendix Figure 1-2 This embodiment applies to a method for determining the illumination mode of the fault indicator (MI) in hybrid commercial vehicles. This method can be implemented in software and configured on commercial vehicles. As shown in the figure, the specific methods for determining the illumination mode of the fault indicator in hybrid commercial vehicles include:

[0020] When the driver powers on the vehicle, the vehicle control unit (VCU) acquires vehicle parameters to determine whether the vehicle has completed high-voltage operation and the propulsion system is activated (ready / normal). This status is then sent to the engine control unit (ECU) via CAN messages. The ECU receives the vehicle system activation status from the VCU, performs an OR operation with the engine parameters to determine the engine's operating status, and uses this result to replace the status parameters used in traditional vehicles to determine whether the engine is running. This enables the determination of the illumination mode of the fault indicator in hybrid commercial vehicles.

[0021] The above vehicle parameters include: power battery voltage parameters, power battery current parameters, T15 parameters, and vehicle fault parameters;

[0022] The parameters used to characterize whether the vehicle has completed high voltage connection and the propulsion system is activated (ready / normal) include: power battery voltage parameters, power battery current parameters, T15 parameters, BMS fault parameters, and PEU fault parameters.

[0023] The aforementioned BMS: Battery Control Unit

[0024] The above-mentioned PEU: Motor Control Unit

[0025] T15 above: Key powered on.

[0026] Example 2

[0027] Reference manual attached Figure 1-2 This embodiment also provides another method for determining the illumination mode of the fault indicator in a hybrid commercial vehicle, the specific implementation method of which is as follows:

[0028] When the driver powers on the vehicle, the vehicle control unit (VCU) acquires vehicle parameters to determine whether the vehicle has completed high-voltage operation and the propulsion system is in a ready / norma state.

[0029] The parameters used to determine whether the vehicle has completed high-voltage operation and the propulsion system is activated (ready / normal) are: power battery voltage parameters, power battery current parameters, T15 parameters, BMS fault parameters, and PEU fault parameters.

[0030] The above-mentioned preconditions for determining whether the vehicle has completed high voltage connection and the propulsion system is activated (ready / normal) are: whether the power battery voltage is higher than a certain threshold, whether the T15 parameter is 1, and whether the BMS and PEU have any faults that affect the safety of the vehicle.

[0031] The vehicle control unit sends this status to the engine control unit (ECU) via CAN message;

[0032] The above states include: ready and normal;

[0033] The above-mentioned "ready" status means: the high-voltage system on the entire vehicle is complete and the propulsion system is activated;

[0034] The above-mentioned normal state is: the high voltage on the whole vehicle is completed and the propulsion system is not activated;

[0035] The above CAN message indicates that the ready state is 1 and the normal state is 0.

[0036] The engine control unit receives the vehicle system activation status from the vehicle control unit;

[0037] The engine control unit determines the engine operating status based on the engine speed signal;

[0038] The above method for determining engine operating status is as follows: when the engine speed is greater than the threshold, the engine operating status is "running", and the result is 1.

[0039] The engine control unit performs an OR operation between the vehicle system activation status and the engine operating status;

[0040] When the vehicle system activation status is 1 or the engine speed is greater than the threshold, the judgment result is: power-on start (Key on-engine on) mode;

[0041] When the vehicle system activation status is 0 and the engine speed is greater than the threshold, the judgment result is: Keyon-engine off mode;

[0042] The engine control unit uses this result to replace the status parameters used in traditional vehicles to determine whether the engine is running, thereby enabling the determination of the illumination mode of the fault indicator in hybrid commercial vehicles.

[0043] The illumination mode of the above fault indicator is as specified in the National VI emission regulations for heavy-duty vehicles (GB17691—2018).

[0044] The instrument panel should display different information based on the current engine fault type (GB17691—2018);

[0045] The aforementioned differences are reflected in the heavy-duty China VI emission regulations.

[0046] According to Examples 1-2, it can be concluded that under different operating conditions, the vehicle control unit (VCU) combines vehicle parameters to determine the high voltage completion and propulsion system activation (ready / normal) status, and sends it to the engine control unit (ECU) via CAN message. The engine control unit (ECU) performs an OR operation on this status with the status result based on whether the engine is started, and uses this result to replace the status parameters for determining whether the engine is started in traditional vehicles. This enables the determination of the lighting mode of the fault indicator in hybrid commercial vehicles, realizes differentiated display of the fault indicator, and meets regulatory requirements.

[0047] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for determining the illumination mode of a fault indicator in a hybrid commercial vehicle, characterized in that, To meet the China VI emission requirements, the fault indicator is differentiated for power-on / power-off display, specifically including the following steps: After the key is powered on, the vehicle control unit determines the high-voltage completion and propulsion system activation status based on vehicle parameters, including power battery voltage parameters, power battery current parameters, T15 parameters, BMS fault parameters, and PEU fault parameters. The determination conditions for the high-voltage completion and propulsion system activation status are: power battery voltage higher than a threshold, T15 parameter of 1, and no BMS or PEU faults affecting vehicle safety. The vehicle control unit sends the status to the engine control unit via CAN message, with "ready" as 1 and "normal" as 0. The engine control unit performs an OR operation on this status with the result based on whether the engine is started. When the vehicle system activation status is 1 or the engine speed is greater than a threshold, the result is "power-on / power-off mode"; when the vehicle system activation status is 0 and the engine speed is less than a threshold, the result is "power-on / power-off mode". This result replaces the traditional vehicle's engine start status parameters, thereby determining the illumination mode of the fault indicator for hybrid commercial vehicles.

2. A control system for the illumination mode of a fault indicator in a hybrid commercial vehicle, characterized in that, The method for implementing claim 1 includes a vehicle control unit module and an engine control unit module. The vehicle control unit module, after the driver applies the high voltage, combines power battery voltage parameters, power battery current parameters, T15 parameters, BMS fault parameters, and PEU fault parameters to determine the completion of high voltage and the activation status of the propulsion system, and sends this information to the engine control unit via a CAN message with a ready state of 1 and a normal state of 0. The engine control unit module performs an OR operation between the acquired system activation status and the status result based on engine speed to determine whether the engine is started, outputting a power-on start or power-on not start mode, replacing the status parameters for determining engine start in traditional vehicles, and achieving differentiated illumination of the fault indicator for hybrid commercial vehicles.

3. The system according to claim 2, characterized in that, The vehicle control unit module and the engine control unit module are used to collect vehicle parameters, battery parameters and engine operating status parameters.

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