A low energy consumption exhaust turbocharger performance test system and detection method
By introducing components such as a combustion chamber, test bench, and proportional valve into the exhaust gas turbocharger performance testing system, and combining them with the high-frequency control of the main control unit, the problem of unstable switching between self-circulation and non-self-circulation states was solved, achieving low-energy consumption and high-efficiency performance testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HUNAN TYEN MACHINERY
- Filing Date
- 2024-12-13
- Publication Date
- 2026-06-16
AI Technical Summary
Existing exhaust gas turbocharger performance testing devices suffer from instability and high energy consumption when switching between self-circulation and non-self-circulation states, making it difficult to achieve a stable gas supply under various testing conditions.
It employs components such as a combustion chamber, test bench, three-way proportional valve, compressed air proportional valve, and compressed air pressure reducing valve. Through high-frequency logic control by the main control unit, it achieves stable switching between self-circulation, over-self-circulation, and under-self-circulation operating conditions. It uses pressure sensors to monitor and supplement air pressure to ensure stable air pressure in the combustion chamber.
It achieves a stable supply of combustion chamber gas pressure under various test conditions, improves test accuracy and efficiency, reduces energy consumption, and has high equipment control precision and low cost.
Smart Images
Figure CN122217633A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of engine performance testing technology, and in particular to a low-energy-consumption exhaust gas turbocharger performance testing system and testing method. Background Technology
[0002] Exhaust gas turbocharger technology, as a related technology for internal combustion engines, effectively helps engines improve output power and reduce energy consumption and emissions. It is also an important way to ensure engine power in high-altitude areas and is widely used in commercial vehicles, passenger vehicles, and construction machinery. With the widespread application of turbocharging technology, testing and evaluation technologies for turbochargers have also made significant progress.
[0003] To test the performance of exhaust gas turbochargers (hereinafter referred to as turbochargers) during the product design and development phase, it is usually necessary to construct corresponding test equipment to simulate the product's operating conditions on an engine, such as turbocharger performance test benches or reliability test benches. Specifically, in performance test bench cases, two common methods are used to simulate the real operating conditions of the turbocharger: external air source hot blowing or self-circulation. The external air source hot blowing method is characterized by the compressor and turbine using separate supply and exhaust pipes, with no connection between them. The self-circulation method is characterized by the compressor's exhaust pipe being connected to the turbine's intake pipe in a controlled manner. The self-circulation method has the advantages of energy saving, reduced consumption, and high testing efficiency; however, it also has the problems of limited conditions for entering operating conditions, high control requirements, and a risk of failure.
[0004] The existing test bench's turbocharger self-circulation operation mode, at a specific speed, ensures that all the compressed air required for the turbine's intake combustion chamber is supplied by the compressor's exhaust pipe, with no other compressed air input. This can be considered a "completely self-circulating" (hereinafter referred to as self-circulation) state. The test bench can only operate and conduct performance tests in two stable states: self-circulation or no self-circulation. Switching between the two states is achieved through the opening and closing of a series of valve groups. There is no stable intermediate state, and the switching may fail. Summary of the Invention
[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a low-energy-consumption exhaust gas turbocharger performance testing system and testing method. It can achieve a stable air supply source to provide compressed air to the combustion chamber under various test conditions for turbocharger performance testing. The test has low energy consumption, high efficiency and high accuracy.
[0006] The technical solution of the present invention is: a low-energy-consumption exhaust gas turbocharger performance testing system, characterized in that it includes a combustion chamber, a test bench, a three-way proportional valve, compressed air, a compressed air proportional valve, and a compressed air pressure reducing valve; The combustion chamber is used to simulate the combustion chamber of an engine, and pressurized exhaust gas is output to the test bench through a connecting pipe; The test bench is used to install an exhaust gas turbocharger. The test bench is equipped with a natural air intake pipe and an exhaust gas pipe. The exhaust gas turbocharger includes a turbine and a compressor. The exhaust gas discharged from the combustion chamber is introduced into the turbine through a connecting pipe. The kinetic energy of the exhaust gas drives the turbine to rotate, thereby driving the impeller of the compressor, which is coaxial with the turbine, to rotate at high speed. This increases the air pressure output by the compressor of the turbocharger, achieving a turbocharging effect. The turbine inlet is connected to the exhaust port of the combustion chamber through a connecting pipe. The exhaust port is connected to the exhaust gas pipe on the test bench. The compressor inlet is connected to the natural air intake pipe of the test bench. The compressor exhaust port is connected to the combustion chamber inlet through a connecting pipe and a three-way proportional valve. The three-way proportional valve includes port a, port b and port c. Port a is connected to the exhaust port of the compressor through a connecting pipe. Port b is connected to the intake port of the combustion chamber through a connecting pipe. Port c is equipped with a pressure relief pipe. Adjusting the opening and closing of port c discharges excess air and is used to adjust the simulated test conditions. The compressed air is connected to the connecting pipe between the three-way proportional valve and the combustion chamber through a connecting pipe, which is used to provide supplementary air source when switching test conditions through the three-way proportional valve to ensure stable air pressure in the combustion chamber. The compressed air proportional valve is used to control the output of compressed air.
[0007] A further technical solution of the present invention is: the compressed air pressure reducing valve is used to precisely regulate the compressed air pressure, and can still maintain a stable input air pressure in the combustion chamber when the airflows of the two pipelines merge.
[0008] A further technical solution of the present invention is: it also includes a main control unit, which performs high-frequency real-time logic control on the three-way proportional valve, the compressed air proportional valve and the compressed air pressure reducing valve to realize the test conditions of self-circulation, over-self-circulation and under-self-circulation, so as to meet the performance test requirements of the turbocharger.
[0009] A further aspect of the present invention is that a pressure sensor is installed on the connecting pipe between the compressor's exhaust port and the three-way proportional valve to monitor the compressor's output air pressure, so that compressed air can be replenished in a timely manner during switching to ensure stable air pressure entering the combustion chamber.
[0010] The technical solution of the present invention is: a method for testing the performance of an exhaust gas turbocharger based on the above-mentioned exhaust gas turbocharger performance testing system, characterized by comprising the following process steps: 1. Control the air intake: By adjusting the three-way proportional valve, the compressed air entering the combustion chamber is controlled to achieve proportional control of the input amount; 2. Switching Operating Conditions: By precisely adjusting the three-way proportional valve, compressed air proportional valve, and compressed air pressure reducing valve through the main control unit, various test operating conditions can be switched. The switching rules are as follows: In self-circulation mode, the ab port of the three-way proportional valve is fully open, the ac port is closed, and the compressed air proportional valve is closed. During self-circulation operation, the ab port channel of the three-way proportional valve is partially open, the ac port channel is partially open, and the compressed air proportional valve is closed. In the under-self-circulation operation, the ab port channel is fully open, the ac port channel is closed, and the compressed air proportional valve is partially open to replenish air. In the absence of self-circulation operation, the ab port channel is closed, the ac port channel is fully open, and the compressed air proportional valve is open. 3. Supplemental airflow: The input of compressed air into the combustion chamber is controlled by a compressed air proportional valve. Then, the compressed air pressure reducing valve reduces the pressure of the compressed air output from the compressed air proportional valve when needed. Referring to the output value of the pressure sensor on the compressor exhaust port connection pipe, the air pressure output from the compressed air pressure reducing valve is the same as or close to the air pressure output from the three-way proportional valve. This ensures that the input air pressure in the combustion chamber remains stable when the airflow from the two pipelines merges, avoiding the impact of air pressure fluctuations on the test accuracy during switching.
[0011] A further aspect of this invention is that, during the switching operation step, a software algorithm designed according to the switching rules is loaded into the main control unit to perform high-frequency precise control on the three-way proportional valve, the compressed air proportional valve, and the compressed air pressure reducing valve, respectively.
[0012] Compared with the prior art, the present invention has the following advantages: The present invention provides a principle structure and testing method for an exhaust gas turbocharger performance testing device, which can obtain a stable gas supply source to provide compressed air to the combustion chamber under various test conditions for turbocharger performance testing. The equipment control system has high control precision and fast response speed, which can effectively improve testing efficiency, reduce test energy consumption, and obtain more accurate test results. In addition, the structure has a high degree of modularity, low equipment cost, and is easy to promote and apply.
[0013] The present invention will be further described below with reference to the figures and embodiments. Attached Figure Description
[0014] Figure 1 A schematic diagram of the structure of an embodiment of the present invention. Detailed Implementation Example
[0015] like Figure 1As shown, a low-energy-consumption exhaust gas turbocharger performance testing system includes a combustion chamber 1, a test bench 2, a three-way proportional valve 3, compressed air 4, a compressed air proportional valve 5, and a compressed air pressure reducing valve 6. The combustion chamber 1 is used to simulate the combustion chamber of an engine and outputs pressurized exhaust gas to the test bench 2 through a connecting pipe; The test bench 2 is used to install an exhaust gas turbocharger. The test bench 2 is equipped with a natural intake pipe 21 and an exhaust pipe 22. The exhaust gas turbocharger includes a turbine 23 and a compressor 24. The exhaust gas discharged from the combustion chamber 1 is introduced into the turbine 23 through a connecting pipe. The kinetic energy of the exhaust gas drives the turbine 23 to rotate, thereby driving the impeller of the compressor 24, which is coaxial with the turbine 23, to rotate at high speed. This increases the air pressure output by the compressor 24 of the turbocharger, achieving a turbocharging effect. The intake port of the turbine 23 is connected to the exhaust port of the combustion chamber 1 through a connecting pipe. The exhaust port is connected to the exhaust pipe 22 on the test bench 2. The intake port of the compressor 24 is connected to the natural intake pipe 21 of the test bench 2. The exhaust port of the compressor 24 is connected to the intake port of the combustion chamber 1 through a connecting pipe and a three-way proportional valve 3. The three-way proportional valve 3 includes port a 31, port b 32 and port c 33. Port a 31 is connected to the exhaust port of compressor 24 through a connecting pipe. Port b 32 is connected to the intake port of combustion chamber 1 through a connecting pipe. Port c 33 is provided with a pressure relief pipe 331. Adjusting the opening and closing of port c 33 discharges excess air and is used to adjust the simulated test conditions. The compressed air 4 is connected to the connecting pipe between the three-way proportional valve 3 and the combustion chamber 1 through the connecting pipe, and is used to provide supplementary air source when switching test conditions through the three-way proportional valve 3 to ensure stable air pressure in the combustion chamber. The compressed air proportional valve 5 is used to control the output of compressed air.
[0016] The compressed air pressure reducing valve 6 is used to precisely regulate the compressed air pressure, and can still maintain a stable input air pressure in the combustion chamber 1 when the airflow from the two pipelines merges.
[0017] It also includes a main control unit, which performs high-frequency real-time logic control on the three-way proportional valve 3, the compressed air proportional valve 5 and the compressed air pressure reducing valve 6 to achieve test conditions of self-circulation, over-self-circulation and under-self-circulation, so as to meet the performance test requirements of the turbocharger.
[0018] A pressure sensor 7 is installed on the connecting pipe between the exhaust port of the compressor 24 and the three-way proportional valve 3 to monitor the output air pressure of the compressor 24, so that the compressed air 4 can be used to replenish the air pressure in time during switching to ensure the stability of the air pressure entering the combustion chamber 1.
Claims
1. A low-energy-consumption exhaust gas turbocharger performance testing system, characterized in that: Includes combustion chamber, test bench, three-way proportional valve, compressed air, compressed air proportional valve and compressed air pressure reducing valve; The combustion chamber is used to simulate the combustion chamber of an engine, and pressurized exhaust gas is output to the test bench through a connecting pipe; The test bench is used to install an exhaust gas turbocharger. The test bench is equipped with a natural air intake pipe and an exhaust gas exhaust pipe. The exhaust gas turbocharger includes a turbine and a compressor. The exhaust gas discharged from the combustion chamber is introduced into the turbine through a connecting pipe. The kinetic energy of the exhaust gas is used to drive the turbine to rotate, thereby driving the compressor impeller, which is coaxial with the turbine, to rotate at high speed. This increases the air pressure output by the compressor of the turbocharger, achieving a turbocharging effect. The turbine inlet is connected to the exhaust port of the combustion chamber through a connecting pipe. The exhaust port is connected to the exhaust gas exhaust pipe on the test bench. The compressor inlet is connected to the natural air intake pipe of the test bench. The compressor exhaust port is connected to the combustion chamber inlet through a connecting pipe and a three-way proportional valve. The three-way proportional valve includes port a, port b and port c. Port a is connected to the exhaust port of the compressor through a connecting pipe. Port b is connected to the intake port of the combustion chamber through a connecting pipe. Port c is equipped with a pressure relief pipe. Adjusting the opening and closing of port c discharges excess air and is used to adjust the simulated test conditions. The compressed air is connected to the connecting pipe between the three-way proportional valve and the combustion chamber through a connecting pipe, which is used to provide supplementary air source when switching test conditions through the three-way proportional valve to ensure stable air pressure in the combustion chamber. The compressed air proportional valve is used to control the output of compressed air.
2. The low-energy-consumption exhaust gas turbocharger performance testing system as described in claim 1, characterized in that... The compressed air pressure reducing valve is used to precisely regulate the compressed air pressure.
3. A low-energy-consumption exhaust gas turbocharger performance testing system as described in claim 1 or 2, characterized in that: It also includes a main control unit, which performs high-frequency real-time logic control on the three-way proportional valve, the compressed air proportional valve and the compressed air pressure reducing valve to achieve test conditions of self-circulation, over-self-circulation and under-self-circulation.
4. A low-energy-consumption exhaust gas turbocharger performance testing system as described in claim 1 or 2, characterized in that... A pressure sensor is installed on the connecting pipe between the compressor's exhaust port and the three-way proportional valve to monitor the compressor's output air pressure.
5. The low-energy-consumption exhaust gas turbocharger performance testing system as described in claim 3, characterized in that... A pressure sensor is installed on the connecting pipe between the compressor's exhaust port and the three-way proportional valve to monitor the compressor's output air pressure.
6. A method for testing the performance of an exhaust gas turbocharger based on the exhaust gas turbocharger performance testing system according to any one of claims 1-5, characterized in that: It includes the following process steps: (1) Controlling the air volume: By adjusting the three-way proportional valve, the compressed air entering the combustion chamber is controlled to achieve proportional control of the input volume; (2) Switching operating conditions: By precisely adjusting the three-way proportional valve, compressed air proportional valve, and compressed air pressure reducing valve through the main control unit, various test operating conditions can be switched. The switching rules are as follows: In self-circulation mode, the ab port of the three-way proportional valve is fully open, the ac port is closed, and the compressed air proportional valve is closed. During self-circulation operation, the ab port channel of the three-way proportional valve is partially open, the ac port channel is partially open, and the compressed air proportional valve is closed. In the under-self-circulation operation, the ab port channel is fully open, the ac port channel is closed, and the compressed air proportional valve is partially open to replenish air. In the absence of self-circulation operation, the ab port channel is closed, the ac port channel is fully open, and the compressed air proportional valve is open. (3) Supplemental air volume: The input volume of compressed air entering the combustion chamber is controlled by the compressed air proportional valve, and the compressed air output through the compressed air proportional valve is reduced when needed by the compressed air pressure reducing valve. Referring to the output value of the pressure sensor on the compressor exhaust port connection pipe, the air pressure output from the compressed air pressure reducing valve is the same as or close to the air pressure output from the three-way proportional valve, so that the input air pressure of the combustion chamber can still be kept stable when the airflow of the two pipelines merges, and the air pressure fluctuation during switching is avoided from affecting the test accuracy.
7. The method for testing the performance of an exhaust gas turbocharger as described in claim 6, characterized in that: During the switching operation, a software algorithm designed according to the switching rules is loaded into the main control unit to perform high-frequency precise control on the three-way proportional valve, the compressed air proportional valve, and the compressed air pressure reducing valve, respectively.