Diesel vehicle OBD function anti-cheating diagnosis system

Abstract

The utility model discloses an OBD function anti-cheating diagnosis system for a diesel vehicle, which belongs to the field of vehicle fault diagnosis, and is characterized in that a CCD camera is used for photographing and identifying, and a sensor cheating identification system is used for automatically judging cheating behaviors; vehicle data are verified and checked, a report is generated according to a check result, the report is recorded uniformly, and corresponding vehicle information is summarized, networked and reported to a filing database, so that a basis is provided for law enforcement. The system mainly comprises a control system, the control system comprises a sensor cheating recognition system, a torque limit cheating recognition system, a fault code cheating recognition system and a urea consumption rationality calculation system, the control system is connected with a camera through a picture processing unit, and the control system is connected with a vehicle OBD diagnosis connector through a data reading unit. The vehicle OBD diagnosis connector is connected with the data reading unit through the OBD connector connecting wire harness. The system is mainly used for diesel vehicle OBD function anti-cheating diagnosis.

Description

Technical Field

[0001] The utility model relates to the field of vehicle fault diagnosis, and in particular to an anti-cheating diagnosis system for an OBD function of a diesel vehicle. Background Art

[0002] The NOx and PM emitted by heavy-duty diesel vehicles have been further reduced. With the elimination of old vehicles and the increase in the number of diesel vehicles that meet the National VI emission standards, the air quality has been greatly improved to a certain extent. However, some people in the market have modified the vehicle post-treatment system and tampered with the data for the sake of profit, resulting in less or no urea spraying in the actual working process of the vehicle, making it difficult for the nitrogen oxides in the exhaust to be fully reacted, resulting in an increase in pollutants emitted by the vehicle into the atmosphere. For example, an OBD diagnostic system with announcement number CN208021372U cannot automatically identify and record sensor cheating. It is necessary to check and verify in multiple dimensions to achieve the purpose of troubleshooting cheating and further ensure the strict implementation of the National VI emission regulations. Summary of the invention

[0003] The purpose of the utility model is to provide an anti-cheating diagnosis system for the OBD function of a diesel vehicle, wherein a CCD camera performs photo recognition, and a sensor cheating recognition system automatically determines cheating behavior; by verifying and checking vehicle data, and generating a report of the inspection results, the report is uniformly recorded, and the corresponding vehicle information is summarized and reported to a filing database online, so as to provide a basis for law enforcement.

[0004] The utility model is realized by the following technical solutions:

[0005] A diesel vehicle OBD function anti-cheating diagnosis system comprises a control system, wherein the control system comprises a sensor cheating identification system, a torque limit cheating identification system, a fault code cheating identification system and a urea consumption rationality calculation system, wherein the control system is connected to a camera via an image processing unit, the control system is connected to a vehicle OBD diagnostic connector via a data reading unit, the vehicle OBD diagnostic connector is connected to the data reading unit via an OBD connector connection harness, the control system is connected to a printer via an analysis result processing unit, and the cameras are a plurality of CCD cameras, which are respectively arranged on mounting frames at a vehicle parking location and correspond to sensors at corresponding mounting positions of the vehicle.

[0006] Furthermore, the plurality of CCD cameras are connected to the image processing unit via a CSI-2 interface.

[0007] Furthermore, the analysis result processing unit is connected to the printer via Bluetooth or wireless.

[0008] Furthermore, the sensor cheating identification system has built-in photos of exhaust temperature sensors in different installation positions of various vehicle models and photos of different nitrogen oxide sensor bodies and connecting wiring harnesses. The sensor cheating identification system has a preset information database, which can perform intelligent comparison to find the information of the exhaust temperature sensor and the nitrogen oxide sensor, and verify whether the exhaust temperature sensor on the vehicle has been raised, removed, or powered off, whether the nitrogen oxide sensor has been modified, whether the wiring harness of the simulation device has been added, whether a simulator has been added, etc.

[0009] Furthermore, the fault code cheating identification system has a built-in fault code status database. When the vehicle OBD diagnostic connector is connected to the vehicle's ECU, the ECU-related fault code information is read. The system compares the status value of the read original fault code with the database to determine whether the original fault code status value has been modified to a masked status bit. If modified, it is determined that the fault code has been masked.

[0010] Furthermore, both the urea consumption rationality calculation system and the torque limit cheating identification system are equipped with a database and a data analysis module. The urea consumption rationality calculation system can perform model calculation on the read vehicle mileage and total urea injection amount to analyze the rationality of urea consumption; the torque limit cheating identification system compares and analyzes the read torque limit function data in the system database to verify whether data tampering has been performed.

[0011] Furthermore, the analysis result processing unit is connected to the filing database via the network to record the results in a unified manner and provide a basis for the next step of law enforcement.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. Each CCD camera is installed on a mounting frame at the parking lot of the vehicle and corresponds to the sensor at the corresponding installation position of the vehicle. The sensor cheating identification system has built-in photos of exhaust temperature sensors at different installation positions of various models and photos of different nitrogen oxide sensor bodies and connecting harnesses. The sensor cheating identification system has a preset information database. The CCD camera takes photos for identification, and the sensor cheating identification system automatically determines the cheating behavior.

[0014] 2. Through verification and inspection of vehicle data, the inspection results are generated into a report, which is recorded uniformly, and the corresponding vehicle information is summarized and reported to the filing database online to provide a basis for the next step of law enforcement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural principle diagram of the utility model. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the accompanying drawings.

[0017] like Figure 1 As shown, embodiment 1, a diesel vehicle OBD function anti-cheating diagnosis system, including a control system, the control system includes a sensor cheating identification system, a torque limit cheating identification system, a fault code cheating identification system and a urea consumption rationality calculation system, the control system is connected to the camera through a picture processing unit, the control system is connected to the vehicle OBD diagnostic connector through a data reading unit, the vehicle OBD diagnostic connector is connected to the data reading unit through an OBD connector connection harness, the control system is connected to the printer through an analysis result processing unit, the camera is a plurality of CCD cameras, and the plurality of CCD cameras are respectively arranged on the mounting frame at the vehicle parking place and correspond to the sensors at the corresponding installation positions of the vehicle, so as to be able to take pictures of the corresponding sensors and complete the identification work. The picture processing unit, the data reading unit and the analysis result processing unit are all prior art, and the unexplained parts such as the sensor cheating identification system, the torque limit cheating identification system, the fault code cheating identification system and the urea consumption rationality calculation system are also prior art.

[0018] Embodiment 2, a diesel vehicle OBD function anti-cheating diagnosis system, wherein the plurality of CCD cameras are connected to the image processing unit via a CSI-2 interface; the analysis result processing unit is connected to the printer via Bluetooth or wireless; the sensor cheating identification system is equipped with photos of exhaust temperature sensors of various vehicle models and different installation positions and photos of different nitrogen oxide sensor bodies and connection harnesses; the sensor cheating identification system is pre-installed with an information base, which can be intelligently compared to find the information of the exhaust temperature sensor and the nitrogen oxide sensor, and check whether the exhaust temperature sensor on the vehicle is raised, removed, or powered off, whether the nitrogen oxide sensor is modified, whether the wiring harness of the simulation device is added, whether the simulator is added, etc.; the fault code cheating identification system is equipped with a fault code status database, when the vehicle OBD diagnostic interface After the head is connected to the ECU of the vehicle, the fault code information related to the ECU is read. The system compares and verifies the status value of the original fault code read with the database to determine whether the status value of the original fault code has been modified to the shielded status bit. If it has been modified, it is determined that the fault code has been shielded; the urea consumption rationality calculation system and the torque limit cheating identification system are both built-in with a database and a data analysis module. The urea consumption rationality calculation system can perform model calculation on the read vehicle mileage and total urea injection volume to analyze the rationality of urea consumption; the torque limit cheating identification system compares and analyzes the read torque limit function data in the system database to verify whether data tampering has been performed; the analysis result processing unit is connected to the filing database through a network to record uniformly and provide a basis for the next step of law enforcement. The rest is the same as Example 1.

[0019] During the inspection, the vehicle needs to be parked in the designated parking space so that the installed CCD cameras can be aimed at the sensors at the corresponding positions of the vehicle for photo identification, and the sensor cheating identification system will determine the cheating behavior; the vehicle OBD diagnostic connector can be connected to the vehicle's ECU for automatic detection and record and report to the filing database; and a comprehensive analysis report can be printed out by the printer.

Claims

1. A diesel vehicle OBD function anti-cheating diagnostic system, including a control system, characterized in that: The control system includes a sensor cheating identification system, a torque limit cheating identification system, a fault code cheating identification system and a urea consumption rationality calculation system. The control system is connected to the camera through a picture processing unit, the control system is connected to the vehicle OBD diagnostic connector through a data reading unit, the vehicle OBD diagnostic connector is connected to the data reading unit through an OBD connector connection harness, the control system is connected to the printer through an analysis result processing unit, and the cameras are a plurality of CCD cameras, which are respectively arranged on mounting racks at vehicle parking locations and correspond to sensors at corresponding mounting positions of the vehicle.

2. The diesel vehicle OBD function anti-cheating diagnostic system according to claim 1 is characterized by: The plurality of CCD cameras are connected to the image processing unit via a CSI-2 interface.

3. The diesel vehicle OBD function anti-cheating diagnostic system according to claim 1 is characterized by: The analysis result processing unit is connected to the printer via Bluetooth or wireless.

4. The diesel vehicle OBD function anti-cheating diagnostic system according to claim 1 is characterized by: The sensor cheating identification system is equipped with photos of exhaust temperature sensors of various vehicle models and different installation positions, as well as photos of different nitrogen oxide sensor bodies and connecting harnesses. The sensor cheating identification system is pre-installed with an information database.

5. The diesel vehicle OBD function anti-cheating diagnostic system according to claim 1 is characterized by: The fault code cheating identification system has a built-in fault code status database.

6. The diesel vehicle OBD function anti-cheating diagnostic system according to claim 1 is characterized by: The urea consumption rationality calculation system and the torque limit cheating identification system are both equipped with a database and a data analysis module.

7. The diesel vehicle OBD function anti-cheating diagnostic system according to claim 1 is characterized by: The analysis result processing unit is connected to the filing database via a network.

Images