A remote pre-diagnosis system and method for vehicle intake throttle valve

Abstract

The present application discloses a vehicle intake throttle valve remote pre-diagnosis system and method, including an engine controller ECU, a vehicle terminal, an enterprise cloud data platform, a data processing early warning system and an after-sales service terminal; the engine controller ECU collects and processes the intake throttle valve opening, driving duty cycle, control opening deviation, and voltage signal, and outputs the intake throttle valve related information to the vehicle terminal; the vehicle terminal is connected to the enterprise cloud data platform for communication, and the intake throttle valve related information is uploaded to the enterprise cloud data platform; the data processing early warning system is connected to the enterprise cloud data platform for communication, and the intake throttle valve related information is called from the enterprise cloud data platform for processing, and the data processing early warning system executes the vehicle intake throttle valve remote pre-diagnosis method and transmits the early warning information to the enterprise cloud data platform. The vehicle intake throttle valve health status is monitored in real time, early warning is given, and early maintenance is performed; after-sales maintenance is more timely.

Description

Technical Field

[0001] The present application relates to a vehicle intake throttle valve remote pre-diagnosis system and method, and in particular to a vehicle intake throttle valve remote pre-diagnosis system and method based on the interaction between a vehicle-mounted terminal and an engine controller ECU, and belongs to the field of automobile and engine technology. Background Art

[0002] In the prior art, the on-board diagnostic system of the ECU processes and analyzes the single stuck time of the intake throttle valve and other information. When the intake throttle valve is stuck for a long time and reaches the error time threshold, a fault error is reported. After the fault error is reported, the fault management module (DSM) calls the prohibition of regeneration function to prohibit driving regeneration after the intake throttle valve stuck fault is reported, so as to achieve the purpose of protecting the DPF. This diagnostic method can only diagnose and identify the intake throttle valve that has been seriously stuck, and the strategy of prohibiting driving regeneration after the fault error is reported cannot effectively protect the DPF.

[0003] In view of the actual situation that the intake throttle valve stuck fault diagnosis and fault response strategy relying solely on the ECU's own on-board diagnostic system cannot effectively protect the DPF. Summary of the invention

[0004] The technical problem to be solved by the present application is that the inlet throttle valve stuck fault diagnosis and fault response strategy relying solely on the ECU's own on-board diagnostic system cannot effectively protect the DPF.

[0005] In order to solve the above technical problems, the technical solution of the present application is to provide a vehicle intake throttle valve remote pre-diagnosis method, comprising the following steps:

[0006] Step 1: Identify the engine state. The intake throttle valve starts to work only after the engine is started. Therefore, the pre-diagnosis method is performed only when the engine is in a running state.

[0007] Step 2: Real-time evaluation is performed through the intake throttle valve opening control deviation. If the opening control deviation exceeds the enterprise preset threshold, the process switches to step 3.

[0008] Step three, when step two switches to step three, the step three timer module will time the single stuck time of the intake throttle valve. If the timing exceeds the enterprise preset threshold, it is determined that there is a risk of sticking, and the single stuck time is output and switched to step four.

[0009] Step 4: perform a maximum operation on the single stuck time output in step 3, output the longest single stuck time, and switch to step 5.

[0010] Step five, compare and determine the longest single stuck time output in step four. If it is identified that the single stuck time has an increasing trend, it is determined that the intake throttle valve of the vehicle has an unacceptable risk of getting stuck, and there is a risk of causing engine combustion to deteriorate and triggering the ECU to report an intake throttle valve stuck fault, then switch to step six.

[0011] Step six, trigger the intake throttle valve stuck warning through step five, and upload the warning information.

[0012] Among them, step six transmits the warning information to the enterprise cloud data platform.

[0013] Preferably, the preset threshold corresponding to the opening control deviation in step 2 is a pre-calibrated threshold for different intake throttle valve models and engine control systems. Similarly, the preset threshold corresponding to the intake throttle valve single stuck time in step 3 is a pre-calibrated threshold for different intake throttle valve models and engine control systems.

[0014] In order to execute the above-mentioned vehicle intake throttle valve remote pre-diagnosis method, the present application provides a vehicle intake throttle valve remote pre-diagnosis system, including an engine controller ECU, a vehicle-mounted terminal, an enterprise cloud data platform, a data processing and early warning system and an after-sales service terminal; the engine controller ECU collects and processes the intake throttle valve opening, drive duty cycle, control opening deviation, and voltage signal, and outputs intake throttle valve related information to the vehicle-mounted terminal; the vehicle-mounted terminal is communicated with the enterprise cloud data platform and uploads the intake throttle valve related information to the enterprise cloud data platform; the data processing and early warning system is communicated with the enterprise cloud data platform and calls the intake throttle valve related information from the enterprise cloud data platform for processing, and the data processing and early warning system executes the vehicle intake throttle valve remote pre-diagnosis method and transmits the early warning information to the enterprise cloud data platform.

[0015] The engine controller ECU communicates with the vehicle terminal based on the UDS protocol. The vehicle terminal has a built-in communication SIM card, which transmits the collected relevant information to the enterprise cloud data platform through the global mobile communication system GSM.

[0016] Preferably, the after-sales service terminal is communicatively connected to the enterprise cloud data platform, and the enterprise cloud data platform sends the corresponding relevant vehicle information to the after-sales service terminal according to the early warning information.

[0017] The advantages of this application are:

[0018] 1. In the prior art, the on-board diagnostic system of the ECU can only diagnose and identify the intake throttle valve that has been seriously stuck. The strategy of prohibiting driving regeneration after the fault error is reported cannot effectively protect the DPF. This application realizes real-time monitoring of the health of the vehicle's intake throttle valve, early warning, and early maintenance based on the existing on-board terminal and enterprise cloud platform.

[0019] 2. The faults diagnosed by the on-board diagnostic system can only be fed back to the after-sales service station for repair or replacement by the end user, which is lagging. This application can realize automatic early warning through the after-sales service terminal, which is more timely for after-sales repair.

[0020] 3. This application can realize big data analysis on the monitoring data of the intake throttle valves of all vehicles in use. If there is a risk of batch failure of the intake throttle valves, it can be discovered earlier and effective measures can be taken to avoid it, thereby improving customer satisfaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A structural diagram of a vehicle intake throttle valve remote pre-diagnosis system provided for this application;

[0022] Figure 2 This is a schematic diagram of the communication between the engine controller ECU and the vehicle terminal;

[0023] Figure 3 This is a schematic diagram of the communication between the vehicle terminal and the enterprise cloud data platform;

[0024] Figure 4 A flow chart of the vehicle intake throttle valve remote pre-diagnosis method provided in this application. DETAILED DESCRIPTION

[0025] In order to make the present application more clear and understandable, a preferred embodiment is described in detail as follows with reference to the accompanying drawings.

[0026] The present application provides a vehicle intake throttle valve remote pre-diagnosis system and method, which can realize real-time monitoring and early warning of the health of the vehicle intake throttle valve, so as to realize maintenance before the intake throttle valve is stuck and report a fault, thereby avoiding the engine combustion deterioration and DPF damage caused by the intake throttle valve being stuck for a long time.

[0027] For details, see Figure 1 , including engine controller ECU1, vehicle terminal 2, enterprise cloud data platform 3, data processing early warning system 4 and after-sales service terminal 5.

[0028] The engine controller ECU1 collects and processes signals such as the intake throttle valve opening, drive duty cycle, control opening deviation, voltage, etc., and outputs information related to the intake throttle valve.

[0029] The vehicle terminal 2 collects the intake throttle valve related information output by the ECU and transmits it to the enterprise cloud data platform in real time. Figure 2 The communication function between the engine controller ECU1 and the vehicle terminal 2 is realized based on the UDS protocol (existing universal automotive diagnostic protocol). The ECU outputs the relevant signals according to the protocol through the UDS protocol, and the vehicle terminal translates the corresponding DID signal according to the UDS protocol to obtain the corresponding physical signal. For example, the control setting value, actual opening and opening control deviation of the intake throttle valve can be obtained by translating 0x10CB, 0x10C6 and 0x10CA.

[0030] The enterprise cloud data platform 3 collects and stores the information related to the intake throttle valves of all vehicles in use. Figure 3 The vehicle terminal 2 has a built-in communication SIM card, which transmits the collected relevant information to the enterprise cloud data platform 3 through the global mobile communication system GSM.

[0031] The data processing warning system 4 is connected to the enterprise cloud data platform 3, and the information related to the intake throttle valve is retrieved from the enterprise cloud data platform 3 for processing, and the time variation trend of the single stuck time of the intake throttle valve of all vehicles in use is obtained. If the single stuck time reaches the warning threshold preset by the manufacturer and has a trend of becoming more serious, the warning is activated, and the relevant warning information is transmitted to the enterprise cloud data platform for storage;

[0032] For details, see Figure 4 , the vehicle intake throttle valve remote pre-diagnosis method comprises the following steps:

[0033] S01, identifying the engine status. The intake throttle valve will not start to work until the engine is started. Therefore, the data processing warning system will only be operated when the engine is in operation.

[0034] S02, real-time evaluation is performed through the intake throttle valve opening control deviation. If the opening control deviation exceeds the enterprise preset threshold, it switches to S03. The preset threshold can be calibrated to meet the technical requirements of different intake throttle valve models and engine control systems;

[0035] S03, when S02 switches to S03, the S03 timer module will count the single stuck time of the intake throttle valve. If the timing exceeds the enterprise preset threshold, it is determined that there is a risk of sticking, and the single stuck time is output and switched to S04. The preset threshold can be calibrated to meet the technical requirements of different intake throttle valve models and engine control systems.

[0036] S04, perform a maximum operation on the single stuck time outputted by S03, output the longest single stuck time, and switch to S05.

[0037] S05, compare and judge the longest single stuck time output by S04. If it is identified that the single stuck time has an increasing trend, it is determined that the intake throttle valve of the vehicle has an unacceptable risk of getting stuck, and there is a risk of causing the engine combustion to deteriorate and triggering the ECU to report an intake throttle valve stuck fault, then switch to S06.

[0038] S06, triggering the intake throttle valve stuck warning system through step S05, and transmitting the warning information to the enterprise cloud data platform.

[0039] The after-sales service terminal 5 is connected to the enterprise cloud data platform 3, and the enterprise cloud data platform 3 sends the relevant vehicle information of the activated warning to the after-sales service terminal. In addition, the after-sales service terminal can also call the relevant information of the intake throttle valve of a specific vehicle through the vehicle identification code VIN code.

[0040] The above five system components and remote pre-diagnosis methods can be used to realize real-time monitoring and early warning of the health of the vehicle's intake throttle valve. Automobile manufacturers use the vehicle terminal and enterprise cloud platform to collect intake throttle valve related information sent by the ECU based on the vehicle terminal, process and analyze it, and automatically screen out vehicles with the risk of intake throttle valve sticking to implement early warning, so as to realize maintenance before the intake throttle valve sticking fault error is reported, avoiding the deterioration of engine combustion caused by long-term intake throttle valve sticking and damage to the engine and its exhaust particulate matter collector DPF.

[0041] The specific implementation of this application can refer to the following embodiments:

[0042] When a vehicle's intake throttle valve is slightly stuck during driving, the intake throttle valve opening control deviation reaches 15%, and the continuous stuck time exceeds the intake throttle valve manufacturer's technical requirement of no more than 5s, reaching 6s, then the data processing warning system of this application records a 6s stuck time. If the vehicle is stuck again for 7s in the subsequent operation, such as two days later, it is determined that the intake throttle valve of the vehicle has a risk of stuck and is unacceptable, and there is a risk of causing engine combustion to deteriorate and triggering the ECU to report an intake throttle valve stuck fault, and an early warning will be triggered. The relevant early warning information will be sent to the after-sales service terminal, and the after-sales service department can take measures as soon as possible to avoid the risks of engine combustion deterioration and intake throttle valve stuck fault error caused by the impending serious stuck intake throttle valve.

Claims

1. A vehicle intake throttle valve remote pre-diagnosis method, characterized in that: The following steps are involved: Step 1: Identify the engine state. The intake throttle valve starts to work only after the engine is started. Therefore, the pre-diagnosis method is performed only when the engine is in a running state. Step 2: Real-time evaluation is performed through the intake throttle valve opening control deviation. If the opening control deviation exceeds the enterprise preset threshold, the process switches to step 3. Step 3: When step 2 switches to step 3, the timer module in step 3 counts the single stuck time of the intake throttle valve. If the time exceeds the enterprise preset threshold, it is determined that there is a risk of stuck, and the single stuck time is output, and the process switches to step 4. Step 4: perform a maximum operation on the single stuck time output in step 3, output the longest single stuck time, and switch to step 5; Step 5: compare and determine the longest single stuck time output in step 4. If it is identified that the single stuck time has an increasing trend, it is determined that the intake throttle valve of the vehicle has a risk of stuck and is unacceptable, and there is a risk of causing engine combustion to deteriorate and triggering the ECU to report an intake throttle valve stuck fault, and then switch to step 6; Step six, trigger the intake throttle valve stuck warning through step five, and upload the warning information to the enterprise cloud data platform.

2. A vehicle intake throttle valve remote pre-diagnosis method as claimed in claim 1, characterized in that: The preset threshold corresponding to the opening control deviation in step 2 is a pre-calibrated threshold for different intake throttle valve models and engine control systems.

3. A vehicle intake throttle valve remote pre-diagnosis method as claimed in claim 1, characterized in that: The preset threshold corresponding to the single stuck time of the intake throttle valve in step 3 is a pre-calibrated threshold for different intake throttle valve models and engine control systems.

4. A vehicle intake throttle valve remote pre-diagnosis system, which executes the vehicle intake throttle valve remote pre-diagnosis method according to claim 1, characterized in that: It includes engine controller ECU, vehicle terminal, enterprise cloud data platform, data processing warning system and after-sales service terminal; engine controller ECU collects and processes intake throttle valve opening, drive duty cycle, control opening deviation, voltage signal, and outputs intake throttle valve related information to the vehicle terminal; The on-board terminal is connected to the enterprise cloud data platform for communication, and the information related to the air intake throttle valve is uploaded to the enterprise cloud data platform; the data processing and early warning system is connected to the enterprise cloud data platform for communication, and the information related to the air intake throttle valve is called from the enterprise cloud data platform for processing. The data processing and early warning system executes the vehicle air intake throttle valve remote pre-diagnosis method and transmits the early warning information to the enterprise cloud data platform.

5. A vehicle intake throttle valve remote pre-diagnosis system as claimed in claim 4, characterized in that: The engine controller ECU communicates with the vehicle terminal based on the UDS protocol.

6. A vehicle intake throttle valve remote pre-diagnosis system as claimed in claim 4, characterized in that: The vehicle-mounted terminal has a built-in communication SIM card, which transmits the collected relevant information to the enterprise cloud data platform via the global mobile communication system GSM.

7. A vehicle intake throttle valve remote pre-diagnosis system as claimed in claim 4, characterized in that: The after-sales service terminal is communicatively connected with the enterprise cloud data platform, and the enterprise cloud data platform sends the corresponding relevant vehicle information to the after-sales service terminal according to the early warning information.

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