Device and method for detecting exhaust emission of hybrid vehicle engine

Abstract

The invention relates to the technical field of exhaust emission detection devices, and discloses a hybrid vehicle engine exhaust emission detection device and method, and the device comprises a test box, the inner wall of the left side of the test box is rotatably connected with a glass observation door, and the top of the test box is provided with an air pump. The inner wall of the test box is slidably connected with a moving column through a spring, the top of the moving column is fixedly connected with a test board, the bottom of the test board is fixedly connected with a limiting rod, and the inner wall of the test board is slidably connected with a sliding plate. And the test bench drives the buffer plate to fix the motor, so that maintenance personnel can quickly position problems, the maintenance cost is reduced, the engine efficiency is improved, rich data is provided for subsequent technical improvement, the detection data of equipment is further improved, a request can be quickly returned, and the overall response speed is improved.

Description

Technical Field

[0001] This invention relates to the field of exhaust emission testing devices, specifically to an exhaust emission testing device and method for hybrid vehicle engines. Background Technology

[0002] As air pollution caused by vehicle exhaust becomes increasingly serious, countries are constantly raising emission standards for motor vehicles. Traditional testing equipment designed for fixed operating conditions is unable to capture such dynamic and complex emission fluctuations and cannot fully and accurately reflect emission levels. This has driven the development of specialized testing devices adapted to hybrid operating conditions.

[0003] The patent with publication number CN216433536U relates to a device for detecting exhaust gas status of automobile engines, which relates to the field of automobile engine technology. It includes a base, a housing, a lead screw slide rail, a sealing cover, a support frame, an automobile exhaust gas detector, and a purification chamber. The housing is fixedly installed at both ends of the base, and the lead screw slide rail is fixedly installed on the top of the housing. The sealing cover is slidably installed on the outside of the lead screw slide rail via a slider. The automobile exhaust gas detector is fixedly installed at both ends of the top of the inner side of the sealing cover. In this invention, after the operator places the car engine on top of the support plate, they control the electric telescopic rod to extend the pressure plate. After the pressure plate contacts and fixes the sides of the car engine, the operator controls the screw slide rail to lower the sealing cover so that the sealing cover fully contacts the top of the base. When the operator starts the car engine and it vibrates, the springs on the outer sides of the telescopic rod and the support rod near the upper and lower ends of the support plate can reduce the vibration, preventing the car engine from moving during testing. Although the springs on the outer sides of the telescopic rod and the support rod near the upper and lower ends of the support plate can reduce the vibration and prevent the car engine from moving during testing, this device is prone to displacement when fixing a hybrid car engine, making it difficult to ensure the stability of the equipment. It is also difficult to guarantee the accuracy of the data and to guarantee the data of the engine under other environments, which can easily lead to incomplete data. Therefore, a hybrid car engine exhaust emission testing device and testing method are proposed to solve the above-mentioned problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a hybrid vehicle engine exhaust emission detection device and detection method to address the shortcomings of the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a hybrid vehicle engine exhaust emission testing device, comprising a test chamber, a glass observation door rotatably connected to the left inner wall of the test chamber, an air pump installed on the top of the test chamber, a movable column slidably connected to the inner wall of the test chamber via a spring, a test platform fixedly connected to the top of the movable column, a limit rod fixedly connected to the bottom of the test platform, a sliding plate slidably connected to the inner wall of the test platform, a pulley installed on the right side of the sliding plate, a movable rod slidably connected to the inner wall of the sliding plate via a spring, a buffer plate fixedly connected to the side of the movable rod away from the limit rod, and a guide groove fixedly connected to the inner wall of the test chamber. The inner wall of the test chamber is in contact with the circumferential surface of the pulley. The inner wall of the test chamber is equipped with an exhaust gas testing mechanism for detecting exhaust gas emissions. The inner wall of the test chamber is also equipped with a temperature detection mechanism for detecting the emissions of engines at different temperatures. During testing, the engine moves the test platform downwards by its own weight. The test platform moves the buffer plate to fix the motor. It can immediately issue an alarm and record abnormal curves, which facilitates maintenance personnel to quickly locate problems, reduce maintenance costs, provide higher measurement accuracy, realize real-time closed-loop control, reduce long-term costs, improve engine efficiency, and provide rich data for subsequent technical improvements. It further improves the detection data of the equipment, enables requests to be returned quickly, and improves the overall response speed. The test chamber includes a sliding plate, a positioning plate rotatably connected to the top of the sliding plate, a rotating plate fixedly connected to the right side of the positioning plate, and a trapezoidal plate fixedly connected to the inner wall of the test chamber. The outer surface of the test chamber is slidably connected to the inner wall of the limiting rod, and the test platform is slidably connected to the inner wall of the test chamber. The rotating plate moves along the trajectory of the trapezoidal plate. While fixing and buffering the engine, the buffer plate drives the positioning plate to position the engine, avoiding data distortion caused by excessive sampling distance, ensuring the capture of the engine's original emission state, adapting to different hybrid architectures without manual adjustment, improving the versatility of the testing device, providing accurate basis for engine maintenance and optimization, and enhancing the adaptability and reliability of the testing device.

[0006] Preferably, the exhaust gas testing mechanism includes a spiral rod, the top of which is fixedly connected to the inner wall of a limiting rod. A rotating rod is rotatably connected to the inner wall of the test chamber. Filter plates are fixedly connected to the front and rear sides of the rotating rod, and an exhaust gas detection device is fixedly connected to the bottom of the filter plates. While the engine exhaust gas is being tested, the limiting rod moves to drive the exhaust gas detection device to test the exhaust gas. This reduces sampling gaps, prevents exhaust gas leakage, ensures that the test data accurately reflects the original emission status of the engine, ensures that the sampling position and posture are consistent each time, reduces human error, improves the repeatability of test data, avoids physical damage caused by manual disassembly, and significantly reduces maintenance costs and downtime. The exhaust gas testing mechanism includes a positioning block. The front and rear sides of the limiting rod are used to fix the positioning block. The inner wall of the positioning block is rotatably connected to an L-rod via a spring. The inner wall of the L-rod is rotatably connected to a cylinder. The circumferential surface of the cylinder contacts the test box. The front and rear sides of the test box are fixedly connected to long plates. The circumferential surface of the spiral rod contacts the inner wall of the test box and the inner wall of the rotating rod. The circumferential surface of the spiral rod has a spiral groove. The inner wall of the rotating rod is fixedly connected to a movable block, and the movable block is slidably connected to the spiral groove. The cylinder moves on the trajectory of the long plate. During testing, the movement of the limiting rod causes the cylinder to cooperate with the long plate to buffer the engine on the test platform. This can both offset the loosening torque generated by vibration through pre-tightening force and absorb vibration energy, avoiding structural fatigue caused by vibration transmission to the connection parts. This ensures the long-term stability of key connections such as the detection port and sampling probe, sensor and mounting base, and prevents failures such as sampling interruption and detection equipment detachment caused by loose connections, thus ensuring the continuity and stability of the testing process.

[0007] Preferably, the temperature detection mechanism includes a rotating column, the circumferential surface of which is rotatably connected to the inner wall of the test chamber. A temperature control device is fixedly connected to the circumferential surface of the rotating column, and an exhaust plate is fixedly connected to the circumferential surface of the rotating column. When the engine is working, the engine's emissions vary in different seasons, with higher emissions in winter. At this time, the temperature can be adjusted by the temperature control device. The rotating column drives the temperature control device to rotate, thereby increasing the engine's emissions. This accurately captures transient high emission data during the cold start phase of hybrid vehicles, ensuring that emission detection covers the entire temperature range of usage scenarios. This significantly improves the versatility of the detection device, making it suitable for multiple scenarios. It accurately simulates emission data under different low-temperature environments, providing quantitative feedback to the R&D team, accelerating the iteration of low-temperature emission optimization technology, and improving the environmental performance of hybrid vehicles. The temperature detection mechanism includes an arc-shaped rack, which is fixedly connected to the inner wall of the test chamber. A ring is rotatably connected to the bottom of the filter plate, and a toothed ring is fixedly connected to the circumferential surface of the ring. A scraper is fixedly connected to the inner wall of the ring. A motor is fixedly connected to the rear side of the test chamber, and the output end of the motor is fixedly connected to the rear side of the rotating column. The circumferential surface of the toothed ring moves along the trajectory of the arc-shaped rack. The top of the scraper contacts the bottom of the filter plate. When the filter plate rotates for detection, the filter plate rotates and drives the scraper to clean, thereby avoiding the exhaust gas extraction effect. After each test, residual pollutants are quickly removed to ensure that there are no impurities accumulating at the extraction point, avoiding cross-contamination. This ensures that each test data can accurately reflect the current emission status of the vehicle, improves test repeatability, reduces mechanical wear of the drive mechanism, improves the operational stability of the device, and reduces the failure rate. A detection method for a hybrid vehicle engine exhaust emission testing device includes the following steps: Step 1: During the test, the staff first opens the glass observation door, then places the hybrid vehicle engine on the test bench. At this time, the engine will move the test bench down by its own weight, the test bench will move the moving column, and the moving column will move the limit rod. Step 2: Simultaneously, the movement of the test platform will drive the sliding plate to move, the sliding plate will drive the pulley to move, the pulley will contact the guide groove through the circumferential surface, causing the pulley to move towards the center, the pulley will drive the sliding plate to move towards the center, the sliding plate will drive the moving rod to move, the moving rod will drive the buffer plate to move towards the engine, while fixing the motor, the buffer plate will buffer the engine. Step 3: While the fixed buffer engine is in operation, the movement of the buffer plate will drive the positioning plate to move, and the positioning plate will drive the rotating plate to move. The rotating plate moves along the trajectory of the trapezoidal plate. Step 4: At this point, the rotating plate will move and come into contact with the inclined surface of the trapezoidal plate, thereby causing the rotating plate to rotate. The rotating plate will then cause the positioning plate to rotate, and the rotation of the positioning plate will simultaneously position the engine.

[0008] The present invention, by adopting the above technical solution, can bring the following beneficial effects: 1. This hybrid vehicle engine exhaust emission testing device and method utilizes the coordinated operation of a test chamber, glass observation door, air pump, test platform, moving column, limit rod, sliding plate, pulley, guide groove, moving rod, buffer plate, positioning plate, rotating plate, and trapezoidal plate. During testing, the engine's own weight moves the test platform downwards, and the test platform, in turn, moves the buffer plate to fix the motor. This immediately triggers an alarm and records abnormal curves, facilitating rapid problem location by maintenance personnel, reducing maintenance costs, providing higher measurement accuracy, enabling real-time closed-loop control, reducing long-term costs, improving engine efficiency, and providing rich data for subsequent technical improvements. It further enhances the device's testing data, enabling rapid response to requests and improving overall response speed. While fixing and buffering the engine, the buffer plate moves the positioning plate to position the engine, preventing data distortion caused by excessive sampling distance, ensuring the capture of the engine's original emission state. It can adapt to different hybrid architectures without manual adjustment, improving the versatility of the testing device, providing accurate data for engine maintenance and optimization, and enhancing the adaptability and reliability of the testing device.

[0009] 2. This hybrid vehicle engine exhaust emission testing device and method, through the coordinated operation of the screw rod, rotating rod, filter plate, and exhaust emission testing device, simultaneously tests the engine exhaust emissions. The movement of the limiting rod drives the exhaust emission testing device to perform the test, reducing sampling gaps, preventing exhaust leakage, ensuring that the test data accurately reflects the engine's original emission status, ensuring consistent sampling position and posture each time, reducing human error, improving the repeatability of test data, avoiding physical damage caused by manual disassembly, and significantly reducing maintenance costs and downtime.

[0010] 3. This hybrid vehicle engine exhaust emission testing device and method utilizes the coordinated operation of an L-shaped rod, a cylinder, a long plate, and a positioning block. During testing, the movement of the limiting rod causes the cylinder to work in conjunction with the long plate to buffer the engine on the test bench. This not only counteracts the loosening torque generated by vibration through pre-tightening force but also absorbs vibration energy, preventing structural fatigue caused by vibration transmission to connection points. This ensures the long-term stability of key connections such as the detection port and sampling probe, and the sensor and mounting base, eliminating malfunctions such as sampling interruption and equipment detachment due to loose connections, and guaranteeing the continuity and stability of the testing process.

[0011] 4. This hybrid vehicle engine exhaust emission testing device and method, through the coordinated operation of a rotating column, a temperature control device, and an exhaust plate, addresses the issue that engine emissions vary in different seasons, with higher emissions in winter. The temperature control device adjusts the temperature, and the rotating column drives the temperature control device to rotate, thereby increasing engine emissions. This accurately captures transient high emission data during the cold start phase of the hybrid vehicle, ensuring emission testing covers the entire temperature range and significantly improving the versatility of the testing device. It is applicable to multiple scenarios, accurately simulates emission data under different low-temperature environments, provides quantitative feedback to the R&D team, accelerates the iteration of low-temperature emission optimization technology, and improves the environmental performance of hybrid vehicles.

[0012] 5. This hybrid vehicle engine exhaust emission testing device and method utilizes the coordinated operation of an arc-shaped rack, toothed ring, circular ring, and scraper. During filter plate rotation testing, the filter plate rotates, driving the scraper to clean, thereby avoiding the effect of exhaust gas extraction. After each test, residual pollutants are quickly removed, ensuring no impurities accumulate at the extraction point, avoiding cross-contamination, and ensuring that each test data accurately reflects the current emission status of the vehicle. This improves test repeatability, reduces mechanical wear of the drive mechanism, enhances the operational stability of the device, and reduces the failure rate. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the buffer plate structure of the present invention; Figure 3 This is a schematic diagram of the positioning plate structure of the present invention; Figure 4 This is a schematic diagram of the guide groove structure of the present invention; Figure 5 This is a schematic diagram of the detection device of the present invention; Figure 6 This is a schematic diagram of the temperature control device of the present invention; Figure 7 This is a schematic diagram of the scraper structure of the present invention.

[0014] In the diagram: 1. Test chamber; 2. Glass observation door; 3. Air pump; 4. Test platform; 5. Moving column; 6. Limiting rod; 7. Exhaust gas testing mechanism; 71. Helical rod; 72. Rotating rod; 73. Filter plate; 74. Exhaust gas detection device; 75. L-shaped rod; 76. Cylinder; 77. Long plate; 78. Positioning block; 8. Temperature detection mechanism; 81. Rotating column; 82. Temperature control device; 83. Exhaust plate; 84. Arc-shaped rack; 85. Gear ring; 86. Circular ring; 87. Scraper; 9. Sliding plate; 10. Pulley; 11. Guide groove; 12. Moving rod; 13. Buffer plate; 14. Positioning plate; 15. Rotating plate; 16. Trapezoidal plate. Detailed Implementation

[0015] 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.

[0016] Please see Figures 1-7 One embodiment of the present invention is: a hybrid vehicle engine exhaust emission testing device, including a test chamber 1, a glass observation door 2 rotatably connected to the left inner wall of the test chamber 1, an air pump 3 installed on the top of the test chamber 1, a moving column 5 slidably connected to the inner wall of the test chamber 1 by a spring, a test platform 4 fixedly connected to the top of the moving column 5, a limit rod 6 fixedly connected to the bottom of the test platform 4, a sliding plate 9 slidably connected to the inner wall of the test platform 4, a pulley 10 installed on the right side of the sliding plate 9, a moving rod 12 slidably connected to the inner wall of the sliding plate 9 by a spring, a buffer plate 13 fixedly connected to the side of the moving rod 12 away from the limit rod 6, a guide groove 11 fixedly connected to the inner wall of the test chamber 1, the inner wall of the guide groove 11 contacting the circumferential surface of the pulley 10, an exhaust gas testing mechanism 7 for detecting exhaust gas emissions 7 provided on the inner wall of the test chamber 1, and a temperature detection mechanism 8 for detecting the emissions of engines at different temperatures 8 provided on the inner wall of the test chamber 1; During testing, staff first open the glass observation door 2, then place the hybrid vehicle engine into the test bench 4. The engine's weight causes the test bench 4 to move downwards, which in turn moves the moving column 5, which in turn moves the limiting rod 6. Simultaneously, the movement of the test bench 4 moves the sliding plate 9, which in turn moves the pulley 10. The pulley 10 then contacts the guide groove 11 via its circumferential surface, causing it to move towards the center. The pulley 10 then moves the sliding plate 9 towards the center, which in turn moves the moving rod 12. The moving rod 12 then moves the buffer plate 13 towards the engine. While fixing the motor, the buffer plate 13 buffers the engine, immediately triggering an alarm and recording abnormal curves. This facilitates rapid problem identification by maintenance personnel, reduces maintenance costs, provides higher measurement accuracy, enables real-time closed-loop control, reduces long-term costs, improves engine efficiency, and provides abundant data for subsequent technical improvements. Furthermore, it enhances the equipment's testing data, allowing for rapid response to requests and improving overall response speed. The test chamber 1 includes a sliding plate 9, a positioning plate 14 is rotatably connected to the top of the sliding plate 9, a rotating plate 15 is fixedly connected to the right side of the positioning plate 14, and a trapezoidal plate 16 is fixedly connected to the inner wall of the test chamber 1; the outer surface of the test chamber 1 is slidably connected to the inner wall of the limiting rod 6, the test platform 4 is slidably connected to the inner wall of the test chamber 1, and the rotating plate 15 moves on the movement trajectory of the trapezoidal plate 16; While the engine is being fixed in place, the movement of the buffer plate 13 will cause the positioning plate 14 to move, which in turn causes the rotating plate 15 to move. The rotating plate 15 moves along the trajectory of the trapezoidal plate 16. At this time, the rotating plate 15 will come into contact with the inclined surface of the trapezoidal plate 16, thereby causing the rotating plate 15 to rotate. The rotating plate 15 will then cause the positioning plate 14 to rotate. The rotation of the positioning plate 14 will simultaneously position the engine, avoiding data distortion caused by excessively long sampling distances, ensuring the capture of the engine's original emission status. It can be adapted to different hybrid architectures without manual adjustment, improving the versatility of the testing device, providing accurate basis for engine maintenance and optimization, and enhancing the adaptability and reliability of the testing device.

[0017] Working Principle: During testing, the engine moves the test bench 4 downwards by its own weight. The test bench 4 then moves the buffer plate 13 to fix the motor, immediately issuing an alarm and recording abnormal curves. This facilitates rapid problem location by maintenance personnel, reduces maintenance costs, provides higher measurement accuracy, enables real-time closed-loop control, reduces long-term costs, improves engine efficiency, and provides rich data for subsequent technical improvements. This further enhances the equipment's testing data, enabling rapid response to requests and improving overall response speed. While fixing and buffering the engine, the buffer plate 13 moves the positioning plate 14 to position the engine, avoiding data distortion caused by excessive sampling distance. This ensures the capture of the engine's original emission status and allows for adaptation to different hybrid architectures without manual adjustment, improving the versatility of the testing device. This provides accurate data for engine maintenance and optimization, enhancing the adaptability and reliability of the testing device.

[0018] Please see Figures 1-7 Based on the above embodiments, in another embodiment of the present invention, the exhaust gas testing mechanism 7 includes a spiral rod 71, the top of the spiral rod 71 is fixedly connected to the inner wall of the limiting rod 6, the inner wall of the test box 1 is rotatably connected to a rotating rod 72, the front and rear sides of the rotating rod 72 are fixedly connected to filter plates 73, and the bottom of the filter plates 73 is fixedly connected to an exhaust gas detection device 74. While the engine exhaust is being discharged, the movement of the limit rod 6 will drive the spiral rod 71 to move. The spiral rod 71 will contact the movable block on the inner wall of the rotating rod 72 through the spiral groove, thereby driving the rotating rod 72 to rotate 90 degrees. The rotating rod 72 will drive the filter plate 73 to rotate, and the filter plate 73 will drive the exhaust gas detection device 74 to rotate. At this time, the suction pump 3 will be started to work, and the suction pump 3 will extract the internal exhaust gas. At this time, the filter plate 73 will rotate to the exhaust port, and the exhaust gas detection device 74 will be started at the same time. The exhaust gas detection device 74 will test the exhaust gas, reduce the sampling gap, avoid exhaust gas leakage, ensure that the test data truly reflects the original emission state of the engine, ensure that the position and posture of each sampling are consistent, reduce human error, improve the repeatability of test data, avoid physical damage caused by manual disassembly, and significantly reduce maintenance costs and downtime. The exhaust gas testing mechanism 7 includes a positioning block 78. The front and rear sides of the limiting rod 6 are used to fix the positioning block 78. The inner wall of the positioning block 78 is rotatably connected to an L-rod 75 via a spring. The inner wall of the L-rod 75 is rotatably connected to a cylinder 76. The circumferential surface of the cylinder 76 contacts the test chamber 1. The front and rear sides of the test chamber 1 are fixedly connected to long plates 77. The circumferential surface of the spiral rod 71 contacts the inner wall of the test chamber 1. The circumferential surface of the spiral rod 71 contacts the inner wall of the rotating rod 72. The circumferential surface of the spiral rod 71 is provided with a spiral groove. The inner wall of the rotating rod 72 is fixedly connected to a movable block, and the movable block is slidably connected to the spiral groove. The cylinder 76 moves on the movement trajectory of the long plate 77. During testing, the engine will vibrate, which can damage the equipment and cause problems in the exhaust gas test. At this time, the movement of the limit rod 6 will drive the positioning block 78 to move, the positioning block 78 will drive the L rod 75 to move, and the L rod 75 will drive the cylinder 76 to move. The cylinder 76 moves on the movement trajectory of the long plate 77. The movement of the cylinder 76 will cause it to rotate by contacting the inclined surface of the long plate 77 through its circumferential surface. At the same time, the cylinder 76, together with the long plate 77, will buffer the engine on the test bench 4. It can both offset the loosening torque generated by vibration through pre-tightening force and absorb vibration energy, avoiding structural fatigue caused by vibration transmission to the connection parts. This ensures the long-term stability of key connections such as the detection port and sampling probe, sensor and mounting base, and prevents failures such as sampling interruption and detection equipment detachment caused by loose connections, thus ensuring the continuity and stability of the testing process.

[0019] Working principle: While monitoring engine exhaust emissions, the movement of the limit rod 6 drives the exhaust gas detection device 74 to test the exhaust gas, reducing sampling gaps, preventing exhaust gas leakage, ensuring that the test data accurately reflects the original emission status of the engine, ensuring consistent sampling position and posture for each sampling, reducing human error, improving the repeatability of test data, avoiding physical damage caused by manual disassembly, and significantly reducing maintenance costs and downtime. During testing, the movement of the limit rod 6 drives the cylinder 76 to work with the long plate 77 to buffer the engine on the test bench 4. This not only counteracts the loosening torque generated by vibration through pre-tightening force, but also absorbs vibration energy, preventing structural fatigue caused by vibration transmission to the connection parts. This ensures the long-term stability of key connections such as the detection port and sampling probe, sensor and mounting base, preventing sampling interruptions and equipment detachment caused by loose connections, and ensuring the continuity and stability of the testing process.

[0020] The temperature detection mechanism 8 includes a rotating column 81, the circumferential surface of the rotating column 81 is rotatably connected to the inner wall of the test chamber 1, a temperature control device 82 is fixedly connected to the circumferential surface of the rotating column 81, and an air outlet plate 83 is fixedly connected to the circumferential surface of the rotating column 81. When the engine is running, the emissions vary in different seasons, with higher emissions in winter. At this time, the temperature can be adjusted by the temperature control device 82. The motor can be started first, and the motor will drive the rotating column 81 to rotate through the output end. The rotating column 81 will drive the temperature control device 82 to rotate. Then, the temperature control device 82 will be started again, and the temperature control device 82 will rotate to lower the internal temperature of the test chamber 1, thereby increasing the engine's emissions. At this time, the exhaust plate 83 rotates to accelerate the extraction of exhaust gas, accurately capturing the transient high emission data of the hybrid vehicle during the cold start stage. This ensures that the emission detection covers the entire temperature range of the application scenarios, greatly improving the versatility of the detection device. It is suitable for multiple scenarios and accurately simulates emission data under different low temperature environments, providing quantitative feedback to the R&D team, accelerating the iteration of low temperature emission optimization technology, and improving the environmental performance of hybrid vehicles. The temperature detection mechanism 8 includes an arc-shaped rack 84, which is fixedly connected to the inner wall of the test chamber 1. A ring 86 is rotatably connected to the bottom of the filter plate 73. A toothed ring 85 is fixedly connected to the circumferential surface of the ring 86. A scraper 87 is fixedly connected to the inner wall of the ring 86. A motor is fixedly connected to the rear side of the test chamber 1. The output end of the motor is fixedly connected to the rear side of the rotating column 81. The circumferential surface of the toothed ring 85 moves on the trajectory of the arc-shaped rack 84. The top of the scraper 87 contacts the bottom of the filter plate 73. A detection method for a hybrid vehicle engine exhaust emission testing device includes the following steps: Step 1: During the test, the staff first opens the glass observation door 2, and then puts the hybrid vehicle engine into the test bench 4. At this time, the engine will move the test bench 4 downward by its own weight. The test bench 4 moves the moving column 5, and the moving column 5 moves the limit rod 6. Step 2: Simultaneously, the movement of the test platform 4 will drive the sliding plate 9 to move, the sliding plate 9 will drive the pulley 10 to move, and the movement of the pulley 10 will cause it to contact the guide groove 11 through the circumferential surface, so that the pulley 10 moves towards the center, the pulley 10 drives the sliding plate 9 to move towards the center, the sliding plate 9 drives the moving rod 12 to move, and the moving rod 12 drives the buffer plate 13 to move towards the engine. While fixing the motor, the buffer plate 13 buffers the engine. Step 3: While the fixed buffer engine is in operation, the movement of the buffer plate 13 will drive the positioning plate 14 to move, and the positioning plate 14 will drive the rotating plate 15 to move. The rotating plate 15 moves on the movement trajectory of the trapezoidal plate 16. Step 4: At this time, the rotating plate 15 will move and come into contact with the inclined surface of the trapezoidal plate 16, thereby driving the rotating plate 15 to rotate. The rotating plate 15 will drive the positioning plate 14 to rotate, and the rotation of the positioning plate 14 will simultaneously position the engine.

[0021] During the rotational testing of the filter plate 73, the rotation of the filter plate 73 drives the rotation of the ring 86, which in turn drives the rotation of the toothed ring 85. The toothed ring 85 rotates on the arc-shaped rack 84, thus meshing with the arc-shaped rack 84, which in turn drives the toothed ring 85 to rotate. The toothed ring 85 drives the weight of the ring 86, which in turn drives the weight of the scraper 87, thus enabling the scraper 87 to clean the filter plate 73. This avoids the need for exhaust gas extraction and quickly removes residual pollutants after each test, ensuring that there is no accumulation of impurities at the extraction point, avoiding cross-contamination, and ensuring that each test data accurately reflects the current emission status of the vehicle. This improves test repeatability, reduces mechanical wear of the drive mechanism, enhances the operational stability of the device, and lowers the failure rate.

[0022] Working Principle: When the engine is running, its emissions vary in different seasons, with higher emissions in winter. Temperature can be adjusted via temperature control device 82. Rotating column 81 drives temperature control device 82 to rotate, thereby increasing engine emissions. This accurately captures transient high emission data during the cold start phase of hybrid vehicles, ensuring emission detection covers the entire temperature range and significantly improving the versatility of the detection device. It is suitable for multiple scenarios, accurately simulating emission data under different low-temperature environments, providing quantitative feedback to the R&D team, accelerating the iteration of low-temperature emission optimization technology, and improving the environmental performance of hybrid vehicles. During the rotation detection of filter plate 73, the rotation of filter plate 73 drives scraper 87 for cleaning, thus avoiding the effect of exhaust gas extraction. Residual pollutants are quickly removed after each test, ensuring no impurities accumulate at the extraction point, avoiding cross-contamination, and ensuring that each test data accurately reflects the current emission status of the vehicle. This improves test repeatability, reduces mechanical wear of the drive mechanism, enhances the operational stability of the device, and lowers the failure rate.

[0023] This invention provides a device and method for detecting exhaust emissions from hybrid vehicle engines. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention. All components not explicitly stated in this embodiment can be implemented using existing technologies.

Claims

1. A hybrid vehicle engine exhaust emission detection device, comprising a test box (1), characterized in that: The left side inner wall of the test box (1) is rotationally connected with a glass observation door (2), the top of the test box (1) is provided with an air exhaust pump (3), the inner wall of the test box (1) is slidably connected with a moving column (5) through a spring, the top of the moving column (5) is fixedly connected with a test table (4), the bottom of the test table (4) is fixedly connected with a limiting rod (6), the inner wall of the test table (4) is slidably connected with a sliding plate (9), the right side of the sliding plate (9) is provided with a pulley (10), the inner wall of the sliding plate (9) is slidably connected with a moving rod (12) through a spring, the side, away from the limiting rod (6), of the moving rod (12) is fixedly connected with a buffer plate (13), the inner wall of the test box (1) is fixedly connected with a guide groove (11), the inner wall of the guide groove (11) is in contact with the circumferential surface of the pulley (10), the inner wall of the test box (1) is provided with a waste gas testing mechanism (7) for detecting exhaust waste gas, and the inner wall of the test box (1) is provided with a temperature detecting mechanism (8) for detecting the emission of engines at different temperatures.

2. The hybrid vehicle engine exhaust emission detection device according to claim 1, characterized in that: The test box (1) comprises a sliding plate (9), the top of the sliding plate (9) is rotationally connected with a positioning plate (14), and the right side of the positioning plate (14) is fixedly connected with a rotating plate (15).

3. The hybrid vehicle engine exhaust emission detection device according to claim 2, characterized in that: The outer surface of the test box (1) is slidably connected with the inner wall of the limiting rod (6), the test table (4) is slidably connected with the inner wall of the test box (1), and the rotating plate (15) moves on the movement track of the trapezoidal plate (16).

4. The hybrid vehicle engine exhaust emission detection device according to claim 3, characterized in that: The waste gas testing mechanism (7) comprises a screw rod (71), the top of the screw rod (71) is fixedly connected with the inner wall of the limiting rod (6), the inner wall of the test box (1) is rotationally connected with a rotating rod (72), the front and back sides of the rotating rod (72) are fixedly connected with filter plates (73), and the bottom of each filter plate (73) is fixedly connected with a waste gas detecting device (74).

5. The hybrid vehicle engine exhaust emission detection device according to claim 4, characterized in that: The waste gas testing mechanism (7) comprises positioning blocks (78), the front and back sides of the limiting rod (6) are fixedly connected with the positioning blocks (78), the inner wall of each positioning block (78) is rotationally connected with an L-shaped rod (75) through a spring, the inner wall of the L-shaped rod (75) is rotationally connected with a cylinder (76), the circumferential surface of the cylinder (76) is in contact with the test box (1), and the front and back sides of the test box (1) are fixedly connected with long plates (77).

6. The hybrid vehicle engine exhaust emission detection device according to claim 5, characterized in that: The circumferential surface of the screw rod (71) is in contact with the inner wall of the test box (1), the circumferential surface of the screw rod (71) is in contact with the inner wall of the rotating rod (72), the circumferential surface of the screw rod (71) is provided with a spiral groove, the inner wall of the rotating rod (72) is fixedly connected with a movable block, the movable block is slidably connected with the spiral groove, and the cylinder (76) moves on the movement track of the long plate (77).

7. The hybrid vehicle engine exhaust emission detection device according to claim 6, characterized in that: The temperature detection mechanism (8) comprises a rotating column (81), the circumferential surface of the rotating column (81) is rotationally connected with the inner wall of the test box (1), the circumferential surface of the rotating column (81) is fixedly connected with a temperature control device (82), and the circumferential surface of the rotating column (81) is fixedly connected with an air outlet plate (83). 8.The hybrid vehicle engine exhaust emission detection device according to claim 7, characterized in that: The temperature detection mechanism (8) comprises an arc-shaped rack (84), the arc-shaped rack (84) is fixedly connected with the inner wall of the test box (1), the bottom of the filter plate (73) is rotationally connected with a circular ring (86), the circumferential surface of the circular ring (86) is fixedly connected with a gear ring (85), and the inner wall of the circular ring (86) is fixedly connected with a scraping rod (87). 9.The hybrid vehicle engine exhaust emission detection device according to claim 8, characterized in that: The rear side of the test box (1) is fixedly connected with a motor, the output end of the motor is fixedly connected with the rear side of the rotating column (81), the circumferential surface of the gear ring (85) moves on the movement track of the arc-shaped rack (84), and the top of the scraping rod (87) is in contact with the bottom of the filter plate (73).

10. A detection method of a hybrid vehicle engine exhaust emission detection device, using the hybrid vehicle engine exhaust emission detection device of claim 9, characterized in that: The method comprises the following steps: Step one: when detecting, the staff first opens the glass observation door (2), and then places the hybrid vehicle engine on the test bench (4), at this time, the engine drives the test bench (4) to move downward through the weight of the engine, the test bench (4) drives the moving column (5) to move, and the moving column (5) drives the limiting rod (6) to move; Step two: at the same time, the test bench (4) moves to drive the sliding plate (9) to move, the sliding plate (9) drives the pulley (10) to move, the pulley (10) moves to be in contact with the circumferential surface of the guide groove (11), so that the pulley (10) moves to the middle, the pulley (10) drives the sliding plate (9) to move to the middle, the sliding plate (9) drives the moving rod (12) to move, and the moving rod (12) drives the buffer plate (13) to move to the engine, while fixing the motor, the buffer plate (13) buffers the engine; Step three: while fixing and buffering the engine, the buffer plate (13) moves to drive the positioning plate (14) to move, the positioning plate (14) drives the rotating plate (15) to move, and the rotating plate (15) moves on the movement track of the trapezoidal plate (16); Step four: at this time, the rotating plate (15) moves to be in contact with the inclined surface of the trapezoidal plate (16), so as to drive the rotating plate (15) to rotate, the rotating plate (15) drives the positioning plate (14) to rotate, and the positioning plate (14) rotates to position the engine at the same time.

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