Automatic measurement and control system of engine thermal test bench

Abstract

The invention discloses an automatic measurement and control system for an engine hot test bench, which belongs to the technical field of engine hot test bench measurement and control and comprises a data acquisition module, an automatic control module, an automatic communication module, a multi-point control module and a hot test period monitoring module. On the basis of various sensors and detection equipment on the rack, communication between the measurement and control system and the data acquisition module is developed autonomously, so that the purpose of function integration is achieved; an autonomous rack communication control function, an automatic report printing function, a multi-point control function, an ECU (Electronic Control Unit) data acquisition and analysis function and a whole vehicle function verification function are added on the interface of the autonomous development measurement and control system, and the boundary condition of the rack is automatically controlled through the information of the sensor; and after each parameter meets the standard, the next working condition test is automatically carried out until the test is finished, so that the accuracy of data measurement is ensured, and the working intensity of staff is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of engine hot test bench measurement and control, and in particular relates to an automatic measurement and control system for an engine hot test bench. Background Art

[0002] The working principle of the engine hot test bench is to simulate various working conditions of the engine in actual operation and conduct a comprehensive test on the engine's performance, reliability and durability. During the test, the engine is first installed on the test bench and connected to the fuel supply, intake and exhaust, cooling and other systems as well as various sensors and dynamometers. After starting the engine, the fuel enters the engine injector through the filter and flow meter under the action of the fuel pump for injection, and is mixed with the air filtered by the air filter and measured by the intake flow meter in the cylinder for combustion. The energy generated by the combustion drives the piston to work, and the engine crankshaft outputs torque and speed. The dynamometer applies a load to the engine according to the test requirements, absorbs the power output by the engine, and measures the torque and speed values ​​of the engine through the torque sensor and speed sensor to calculate the engine power. At the same time, various sensors monitor the engine's operating parameters such as temperature, pressure, vibration, etc. in real time. The data acquisition system collects these data and transmits them to the computer. The computer software processes, analyzes and stores the data to evaluate whether the engine's performance meets the design requirements and whether there are hidden dangers of failure. During the test, you can also adjust parameters such as fuel supply, air intake, dynamometer load, etc. to simulate different operating conditions, such as idling, acceleration, full load, etc., to comprehensively test the engine's performance under various operating conditions.

[0003] The existing bench test system has a single function, which is only a test recording function, and each step in the test process needs to be manually recorded, which is inconvenient to use. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide an automatic measurement and control system for an engine hot test bench.

[0005] The technical solution adopted to solve the above technical problems is: an automatic measurement and control system for an engine hot test bench, including six subsystems: a data acquisition module, an automatic control module, an automatic communication module, a multi-point control module, a hot test cycle monitoring module, and a whole vehicle function verification module. The data acquisition module is responsible for collecting data on the engine hot test bench through sensors; the automatic control module is responsible for controlling the actuator according to the data sent back by the system; the automatic communication module is responsible for transmitting data; the multi-point control module is responsible for unified control of multiple benches; the hot test cycle monitoring module is responsible for monitoring the working cycle of the engine hot test bench and automatically enters the next working condition test after the parameters meet the standards until the test is completed; the whole vehicle function verification module is responsible for verifying whether the overall function of the engine hot test bench is complete.

[0006] Through the above technical scheme, the communication between the self-developed measurement and control system and the data acquisition module can be realized on the basis of various sensors and detection equipment on the test bench, so as to achieve the purpose of functional integration; and the interface of the self-developed measurement and control system can be increased including the self-developed test bench communication control function, automatic report printing function, multi-point control function, ECU data acquisition and analysis function, and vehicle function verification function. The boundary conditions of the control bench can be automatically controlled through the information of the sensor. When all parameters meet the standards, the next working condition test will be automatically entered until the test is completed, which ensures the accuracy of data measurement and reduces the workload of employees.

[0007] Furthermore, the data acquisition module includes a dynamometer, a sensor, a detection device and an actuator, the sensor includes a pressure sensor, a temperature sensor and a flow sensor, the detection device communicates with the data acquisition module through an automatic communication module, and the automatic control module controls the actuator to control the engine hot test bench.

[0008] Furthermore, the multi-point control module includes eight subsystems: a water gate automatic control module, an operating condition automatic recording module, an intercooler after-temperature exhaust back pressure automatic control module, a remote start control module, a smoke density automatic measurement module, an automatic report printing module, an operating condition automatic recording module, a remote test bench control module, and a three-level alarm module.

[0009] Furthermore, the multi-point control module transmits the test data of each test bench to the server storage via Ethernet. When performing multi-point control, the test data of the corresponding test bench in the server is called to realize multi-point operation. The data is stored through the server and transmitted using Ethernet to realize full monitoring by the background computer. The test bench control system has the functions of automatic recording, three-level alarm shutdown, and full life cycle data collection.

[0010] Furthermore, the specific formula of the three-level alarm module is:

[0011]

[0012] in,

[0013] I is the fault warning indicator;

[0014] T k is the actual temperature value of the kth temperature monitoring point, T n is the corresponding upper limit of the normal temperature range, q is the number of temperature monitoring points;

[0015] P l is the actual pressure value of the lth pressure monitoring point, P n is the corresponding upper limit of the normal pressure range, r is the number of pressure monitoring points;

[0016] When I exceeds a certain set threshold, it indicates that the engine has abnormal temperature and pressure, and timely troubleshooting and processing are required to avoid serious damage to the engine and ensure the smooth progress of the hot test.

[0017] Through the above technical solution, all aspects of the engine hot test cycle can be fully and effectively monitored to ensure the quality and reliability of the hot test process.

[0018] Furthermore, the water gate automatic control module is responsible for automatically controlling the water gate in the cooling system of the engine hot test bench, real-time monitoring of key parameters such as engine temperature, collecting engine coolant temperature data through sensors, and transmitting it to the control system; the operating condition automatic recording module is responsible for automatically and continuously recording various operating condition data of the engine during the engine hot test; the intercooler after-temperature exhaust back pressure automatic control module is responsible for accurately controlling the air temperature at the intercooler outlet and measuring the back pressure value in the exhaust system through a pressure sensor, and then controlling the exhaust back pressure regulating device according to the engine operating condition and the preset back pressure curve.

[0019] Furthermore, the remote start control module is responsible for connecting with the engine start system through network communication technology. The operator inputs the start command on the remote control terminal, and the command is transmitted to the control system of the hot test bench via the network; the automatic smoke measurement module is used to detect the engine exhaust smoke to evaluate the engine's combustion quality and emissions.

[0020] Furthermore, the automatic report printing module is responsible for automatically organizing the data, analysis results and related test information collected during the engine hot test and generating a test report, and then outputting the paper report through the printer; the remote test bench control module is a comprehensive control platform, which not only has the remote start-up control module startup function, but also remotely operates and monitors multiple other systems and equipment of the engine hot test bench.

[0021] The beneficial effects of the present invention are as follows: the present invention realizes the communication between the independently developed measurement and control system and the data acquisition module on the basis of various sensors and detection equipment on the test bench, thereby achieving the purpose of functional integration; and adds independent test bench communication control function, automatic report printing function, multi-point control function, ECU data acquisition and analysis function, and vehicle function verification function to the interface of the independently developed measurement and control system, and automatically controls the test bench boundary conditions through the information of the sensor, and automatically enters the next working condition test when each parameter meets the standard until the test is completed, thereby ensuring the accuracy of data measurement and reducing the workload of employees. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a diagram of the automatic measurement and control system of the engine hot test bench of the present invention;

[0023] Figure 2 It is the multi-point control principle diagram of the present invention;

[0024] Figure 3 It is a simplified diagram of the multi-point control function of the present invention;

[0025] Figure 4 It is a schematic diagram of each control module of the multi-point control of the present invention. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] like Figure 1-Figure 4 As shown, an automatic measurement and control system for an engine hot test bench in this embodiment includes six subsystems: a data acquisition module, an automatic control module, an automatic communication module, a multi-point control module, a hot test cycle monitoring module, and a whole vehicle function verification module. The data acquisition module is responsible for collecting data on the engine hot test bench through sensors; the automatic control module is responsible for controlling the actuator according to the data sent back by the system; the automatic communication module is responsible for transmitting the data; the multi-point control module is responsible for unified control of multiple benches; the hot test cycle monitoring module is responsible for monitoring the working cycle of the engine hot test bench and automatically enters the next working condition test after the parameters meet the standards until the test is completed; the whole vehicle function verification module is responsible for verifying whether the overall function of the engine hot test bench is complete.

[0028] The data acquisition module includes a dynamometer, a sensor, a detection device and an actuator. The sensor includes a pressure sensor, a temperature sensor and a flow sensor. The detection device communicates with the data acquisition module through an automatic communication module. The automatic control module controls the actuator to control the engine hot test bench.

[0029] The multi-point control module includes eight subsystems: a water gate automatic control module, an operating condition automatic recording module, an intercooler after-temperature exhaust back pressure automatic control module, a remote start control module, a smoke density automatic measurement module, an automatic report printing module, an operating condition automatic recording module, a remote bench control module, and a three-level alarm module.

[0030] The multi-point control module transmits the test data of each test bench to the server storage via Ethernet. When performing multi-point control, the test data of the corresponding test bench in the server is called to realize multi-point operation. The data is stored through the server and transmitted using Ethernet to realize full monitoring by the background computer. The test bench control system has the functions of automatic recording, three-level alarm shutdown, and full life cycle data collection.

[0031] The specific formula for the three-level alarm module is:

[0032]

[0033] in,

[0034] I is the fault warning indicator;

[0035] T k is the actual temperature value of the kth temperature monitoring point, T n is the corresponding upper limit of the normal temperature range, q is the number of temperature monitoring points;

[0036] P l is the actual pressure value of the lth pressure monitoring point, P n is the corresponding upper limit of the normal pressure range, r is the number of pressure monitoring points;

[0037] When I exceeds a certain set threshold, it indicates that the engine has abnormal temperature and pressure, and timely troubleshooting and processing are required to avoid serious damage to the engine and ensure the smooth progress of the hot test.

[0038] The water gate automatic control module is responsible for automatically controlling the water gate in the cooling system of the engine hot test bench, real-time monitoring of key parameters such as engine temperature, collecting engine coolant temperature data through sensors, and transmitting it to the control system; the operating condition automatic recording module is responsible for automatically and continuously recording various operating condition data of the engine during the engine hot test; the intercooler after-temperature exhaust back pressure automatic control module is responsible for accurately controlling the air temperature at the intercooler outlet and measuring the back pressure value in the exhaust system through a pressure sensor, and then controlling the exhaust back pressure regulating device according to the engine operating conditions and the preset back pressure curve.

[0039] The remote start control module is responsible for connecting with the engine start system through network communication technology. The operator enters the start command on the remote control terminal, and the command is transmitted to the control system of the hot test bench via the network; the automatic smoke measurement module is used to detect the engine exhaust smoke to evaluate the engine's combustion quality and emissions.

[0040] The automatic report printing module is responsible for automatically organizing the data, analysis results and related test information collected during the engine hot test and generating a test report, and then outputting the paper report through a printer; the remote test bench control module is a comprehensive control platform, which not only has the remote start control module startup function, but also remotely operates and monitors multiple other systems and equipment of the engine hot test bench.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. An automatic measurement and control system for an engine hot test bench, characterized in that: It includes six subsystems: data acquisition module, automatic control module, automatic communication module, multi-point control module, hot test cycle monitoring module, and vehicle function verification module. The data acquisition module is responsible for collecting data on the engine hot test bench through sensors; the automatic control module is responsible for controlling the actuator according to the data sent back by the system; the automatic communication module is responsible for transmitting data; the multi-point control module is responsible for unified control of multiple test benches; the hot test cycle monitoring module is responsible for monitoring the working cycle of the engine hot test bench and automatically enters the next working condition test when the parameters meet the standards until the test is completed; The vehicle function verification module is responsible for verifying whether the overall function of the engine hot test bench is complete.

2. The automatic measurement and control system for an engine hot test bench according to claim 1, characterized in that: The data acquisition module includes a dynamometer, a sensor, a detection device and an actuator. The sensor includes a pressure sensor, a temperature sensor and a flow sensor. The detection device communicates with the data acquisition module through an automatic communication module. The automatic control module controls the actuator to control the engine hot test bench.

3. The automatic measurement and control system for an engine hot test bench according to claim 1, characterized in that: The multi-point control module includes eight subsystems: a water gate automatic control module, an operating condition automatic recording module, an intercooler after-temperature exhaust back pressure automatic control module, a remote start control module, a smoke density automatic measurement module, an automatic report printing module, an operating condition automatic recording module, a remote bench control module, and a three-level alarm module.

4. The automatic measurement and control system for an engine hot test bench according to claim 3, characterized in that: The multi-point control module transmits the test data of each test bench to the server storage via Ethernet. When performing multi-point control, the test data of the corresponding test bench in the server is called to realize multi-point operation. The data is stored through the server and transmitted using Ethernet to realize full monitoring by the background computer. The test bench control system has the functions of automatic recording, three-level alarm shutdown, and full life cycle data collection.

5. The automatic measurement and control system for an engine hot test bench according to claim 4, characterized in that: The specific formula for the three-level alarm module is: in, I is the fault warning indicator; T k is the actual temperature value of the kth temperature monitoring point, T n is the corresponding upper limit of the normal temperature range, q is the number of temperature monitoring points; P l is the actual pressure value of the lth pressure monitoring point, P n is the corresponding upper limit of the normal pressure range, r is the number of pressure monitoring points; When I exceeds a certain set threshold, it indicates that the engine has abnormal temperature and pressure, and timely troubleshooting and processing are required to avoid serious damage to the engine and ensure the smooth progress of the hot test.

6. The automatic measurement and control system for an engine hot test bench according to claim 4, characterized in that: The water gate automatic control module is responsible for automatically controlling the water gate in the cooling system of the engine hot test bench, real-time monitoring of key parameters such as engine temperature, collecting engine coolant temperature data through sensors, and transmitting it to the control system; The operating condition automatic recording module is responsible for automatically and continuously recording various operating condition data of the engine during the engine hot test; the intercooler after-temperature exhaust back pressure automatic control module is responsible for accurately controlling the air temperature at the intercooler outlet and measuring the back pressure value in the exhaust system through the pressure sensor, and then controlling the exhaust back pressure adjustment device according to the engine operating condition and the preset back pressure curve.

7. The engine hot test bench automatic measurement and control system according to claim 6, characterized in that: The remote start control module is responsible for connecting with the engine start system through network communication technology. The operator inputs the start command on the remote control terminal, and the command is transmitted to the control system of the hot test bench through the network; The automatic smoke measurement module is used to detect the engine exhaust smoke to evaluate the engine's combustion quality and emissions.

8. The automatic measurement and control system for an engine hot test bench according to claim 7, characterized in that: The automatic report printing module is responsible for automatically organizing the data, analysis results and related test information collected during the engine hot test and generating a test report, and then outputting the paper report through a printer; the remote test bench control module is a comprehensive control platform, which not only has the remote start control module startup function, but also remotely operates and monitors multiple other systems and equipment of the engine hot test bench.

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