A modified structure for automobile GPF emission test

Abstract

The utility model discloses a kind of automobile GPF emission test reform structure, including GPF body, the flange is equipped in GPF body end part, fixed support is equipped outside GPF body, thermocouple socket is equipped on GPF body, using the automobile GPF emission test reform structure of the utility model, shorten test time, realize the reuse of GPF body, improve installation efficiency and temperature measurement accuracy.

Description

Technical Field

[0001] This utility model belongs to the field of automotive emission testing. Specifically, this utility model relates to a modified structure for automotive GPF emission testing. Background Technology

[0002] Vehicle exhaust emissions cause pollutants, seriously polluting and harming human health and the environment. To reduce pollution, a Gasoline Particulate Filter (GPF) is used in gasoline engines as an aftertreatment device for exhaust gases. Its main function is to capture and reduce particulate emissions, thereby protecting the environment. Its working principle is similar to that of a diesel engine GPF (diesel engine particulate filter), capturing particulate matter through a wall-flow filter and being regenerated under the control of the ECU to restore its performance.

[0003] GPF emission testing is a necessary measure to assess and control the environmental impact of vehicle emissions and reduce pollution. Vehicle GPF emission testing provides crucial data on the emission levels of these pollutants, offering a scientific basis for environmental pollution control and protection.

[0004] In traditional automotive emissions testing, the GPF and muffler or catalytic converter are usually integrated. Their size exceeds the capacity of the GPF oven and measuring balance, requiring the GPF to be separated from the muffler or catalytic converter by cutting, and then the GPF to be welded back together later. This method is time-consuming and labor-intensive. In addition, if test parts need to be replaced or the GPF needs to be repaired, the welded parts can only be destructively cut and disassembled, which can easily damage other parts of the exhaust system.

[0005] Patent CN112051077A, published on December 8, 2020, discloses a method for reliable testing of a passenger vehicle's GPF (Gas Powder Collector). The method includes the following steps: installing a temperature sensor on the vehicle's GPF to monitor its temperature and measure the weight of particulate matter captured; configuring a data acquisition system to monitor the vehicle's status throughout the test process; compiling a complete set of test conditions and mileage distributions; breaking down the test conditions and mileage distributions into specific driving and operation plans based on the test track roads, creating a voice prompt file; during the test, the driver follows the voice prompts to drive and perform related operations, ensuring the vehicle operates under the specified conditions; and checking the vehicle's GPF status and emissions results after each test condition to assess GPF reliability. However, this method for reliable testing of a passenger vehicle's GPF fails to address the aforementioned technical problems. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing a modified structure for automotive GPF emission testing that shortens testing time, enables the reuse of the GPF body, and improves installation efficiency and temperature measurement accuracy.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] The modified structure for automotive GPF emission testing includes a GPF body, a flange at the end of the GPF body, a fixed bracket on the outside of the GPF body, and a thermocouple socket on the GPF body.

[0009] The flange has a circular tube section on one side, the outer side of which contacts the inner side of the GPF body end, and the end face of one side of the flange is welded to the end of the GPF body.

[0010] The fixing bracket is welded to the outside of the GPF body, and the fixing bracket has a Z-shaped structure.

[0011] The thermocouple socket is provided with multiple ports.

[0012] The flange and the circular pipe are an integral structure.

[0013] The modified structure for the automotive GPF emission test also includes a clamp, which includes a clamp body with limiting edges on both sides.

[0014] The flange is connected to the test piece, and the end of the test piece is provided with a connecting flange. The flange and the connecting flange are arranged opposite to each other and in contact. The clamping body presses the flange and the connecting flange together, and the limiting edge abuts against the end face of the flange and the connecting flange.

[0015] The technical advantages of this utility model are as follows: The modified structure for automotive GPF emission testing uses a flange to connect the test piece instead of the existing welding method, avoiding damage to the GPF body structure during disassembly. The thermocouple wiring harness is securely installed on the outside of the GPF body using a fixed bracket, optimizing the thermocouple installation method and ensuring accurate measurement values ​​during emission testing. Furthermore, clamps can be used for locking and fixing, shortening the testing time and improving testing efficiency. Attached Figure Description

[0016] This manual includes the following figures, which illustrate the following:

[0017] Figure 1 This is a front view schematic diagram of the end structure of the GPF body of this utility model;

[0018] Figure 2 This is a top view schematic diagram of the end structure of the GPF body of this utility model;

[0019] Figure 3 This is a schematic diagram of the connection between the GPF body and the test piece using clamps according to this utility model;

[0020] Figure 4 yes Figure 3 A schematic diagram of the AA section.

[0021] The markings in the diagram are as follows: 1. GPF body; 2. Flange; 3. Fixing bracket; 4. Thermocouple socket; 5. Round tube section; 6. Clamp; 7. Clamp body; 8. Limiting edge; 9. Test piece; 10. Connecting flange. Detailed Implementation

[0022] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of this invention, and to facilitate its implementation.

[0023] like Figure 1 and Figure 2 As shown, the modified structure for automotive GPF emission testing includes a GPF body 1, a flange 2 at one end of the GPF body 1, a fixing bracket 3 on the outside of the GPF body 1, and a thermocouple socket 4 on the GPF body 1. The flange 2 connects the GPF body 1 to the test piece 9, replacing the existing welding method. This avoids damage to the structure of the GPF body 1 during disassembly, allowing for multiple disassembly and reassembly for reuse, thus reducing testing costs. The fixing bracket 3 optimizes the thermocouple installation method, ensuring the thermocouple is securely mounted on the GPF body 1, preventing displacement or detachment during testing, ensuring good heat conduction between the thermocouple and the GPF body 1, resulting in accurate measurement data and reduced measurement errors. The thermocouple socket 4 is located on one side of the fixing bracket 3 and is used to insert the thermocouple measuring end into the GPF body 1 to obtain temperature data.

[0024] like Figure 1 and Figure 2 As shown, flange 2 has a circular tube 5 on one side. The outer side of the circular tube 5 contacts the inner side of the end of the GPF body 1, and one end face of flange 2 is welded to the end of the GPF body 1. The outer diameter of the circular tube 5 matches the inner diameter of the end of the GPF body 1, and it also plays a circumferential positioning role in the welding process of flange 2, ensuring uniform circumferential welding quality between flange 2 and the end of GPF body 1. The installation requirements for flange 2 are as follows: After cutting the connection between the test GPF body 1 and the catalytic converter or muffler, flange 2 is welded to the end of GPF body 1 while keeping the original vehicle installation angle unchanged, ensuring that flange 2 and GPF body 1 are coaxial.

[0025] like Figure 2As shown, the fixing bracket 3 is welded to the outside of the GPF body 1, and the fixing bracket 3 has a U-shaped structure. The fixing bracket 3 provides a fixed position for the thermocouple wire harness. After the two ends of the U-shaped fixing bracket 3 are welded to the GPF body 1, the middle part forms a cavity for fixing the thermocouple wire harness. The thermocouple wire harness is firmly installed on the GPF body 1 through this cavity, making it difficult to move or fall off during the test or under different working conditions. This ensures the positional stability of the thermocouple during the test. Since thermocouples are usually vertically inserted, the fixing bracket 3 reduces the tensile force on the thermocouple measuring end of its wire harness, making it less likely for the measuring end to move inside the GPF body 1, thus ensuring the accuracy of the measurement data. In addition, when the thermocouple fails, it facilitates wire harness management and makes maintenance and replacement convenient.

[0026] like Figure 1 As shown, multiple thermocouple ports 4 are provided. The thermocouples are vertically inserted into the center of the GPF body 1 through the thermocouple ports 4 to measure the temperature. Multiple thermocouple ports 4 facilitate the vertical insertion of thermocouples into the interior of the GPF body 1 at 1 / 6, 1 / 2, and 5 / 6 of their length, so as to monitor temperature changes in multiple areas inside the GPF body 1.

[0027] like Figure 4 As shown, flange 2 and the circular pipe section 5 are an integral structure. This integral structure reduces welding difficulty.

[0028] like Figure 3 and Figure 4 As shown, the modified structure for the automotive GPF emission test also includes a clamp 6, which comprises a clamp body 7 with limiting edges 8 on both sides. The clamp 6 consists of two hinged clamp bodies 7, which are fixed by bolts. Using the clamp 6 further improves the stability of the connection between the GPF body 1 and the test piece 9, while also facilitating disassembly. The bolts of the clamp 6 allow for quick installation and fixation, improving installation efficiency and reducing potential errors and damage during installation. The clamp 6 connection also features easy disassembly; when the GPF body 1 needs replacement or repair, the clamp 6 can be easily disassembled for quick replacement. The clamp body 7 is used to press the outer edge surface, achieving radial fixation after bolt locking. The limiting edges 8 prevent axial movement between the pressed flange 2 and the clamp body 7. The spacing of the limiting edges 8 needs to be adapted to the thickness of the two flanges 2. Compared to the original welded connection, the volume of the GPF body 1 is reduced, allowing it to be directly placed into the oven and measuring balance.

[0029] like Figure 3As shown, flange 2 is connected to test piece 9. Test piece 9 has a connecting flange 10 at its end. Flange 2 and connecting flange 10 are positioned opposite each other and in contact. Clamp 7 presses flange 2 and connecting flange 10 together, and limiting edge 8 abuts against the end faces of flange 2 and connecting flange 10. The flange 2 on the GPF body 1 has the same specifications as the connecting flange 10 of test piece 9 (such as a catalyst or muffler) to facilitate welding of flange 2 or locking with clamp 6. When using clamp 6, after the two flange 2 end faces connecting GPF body 1 and test piece 9 contact each other, clamp 6 is used to lock them together, ensuring that clamp 7 presses flange 2 and limiting edge 8 abuts flange 2, guaranteeing a firm connection between GPF body 1 and test piece 9. Depending on the test site conditions, the connection between GPF body 1 and test piece 9 can be achieved by welding flange 2, connecting with clamp 6, or using both methods. All three connection methods eliminate the need for welding on the end face of GPF body 1, avoiding damage to the structure of GPF body 1.

[0030] The modified structure for automotive GPF emission testing connects the test piece 9 to the flange 2 instead of the existing welding method, avoiding damage to the structure of the GPF body 1 during disassembly. The thermocouple wiring harness is securely installed on the outside of the GPF body 1 using a fixed bracket 3, optimizing the thermocouple installation method and ensuring accurate measurement values ​​during emission testing. The clamp 6 can also be used for locking and fixing, shortening the test time and improving test efficiency.

[0031] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A modified structure for automotive GPF emission testing, characterized in that: It includes a GPF body (1), a flange (2) at the end of the GPF body (1), a fixed bracket (3) on the outside of the GPF body (1), and a thermocouple socket (4) on the GPF body (1).

2. The modified structure for automotive GPF emission testing according to claim 1, characterized in that: The flange (2) has a circular tube (5) on one side, the outer side of the circular tube (5) is in contact with the inner side of the end of the GPF body (1), and the end face of one side of the flange (2) is welded to the end of the GPF body (1).

3. The modified structure for automotive GPF emission testing according to claim 2, characterized in that: The fixing bracket (3) is welded to the outside of the GPF body (1), and the fixing bracket (3) has a Z-shaped structure.

4. The modified structure for automotive GPF emission testing according to claim 3, characterized in that: The thermocouple socket (4) is provided with multiple ports.

5. The modified structure for automotive GPF emission testing according to claim 4, characterized in that: The flange (2) and the round pipe section (5) are an integral structure.

6. The modified structure for automotive GPF emission testing according to any one of claims 1-5, characterized in that: It also includes a clamp (6), which includes a clamp body (7) and limiting edges (8) on both sides of the clamp body (7).

7. The modified structure for automotive GPF emission testing according to claim 6, characterized in that: The flange (2) is connected to the test piece (9), and the end of the test piece (9) is provided with a connecting flange (10). The flange (2) and the connecting flange (10) are arranged opposite to each other and in contact. The clamp (7) presses the flange (2) and the connecting flange (10) together, and the limiting edge (8) abuts against the end face of the flange (2) and the connecting flange (10).

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