CN113899551A - Control method for fuel cell automobile engine test bench and test bench - Google Patents
Control method for fuel cell automobile engine test bench and test bench Download PDFInfo
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- G01M15/00—Testing of engines
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Abstract
The present invention relates to the field of fuel cell vehicles. The control method for the fuel cell automobile engine test board comprises the following steps: connecting a fuel cell with a driver of an engine to be tested, connecting a load motor with a motor of the engine to be tested, measuring to obtain the relationship between the voltage and the current of the load motor and the rotating speed and the torque of the engine, and building a simulation model according to the relationship between the voltage and the current of the load motor and the rotating speed and the torque of the engine; step two: connecting a fuel cell with a driver of an engine to be tested, replacing the motor with an electronic load to connect the motor of the engine to be tested, measuring to obtain the voltage and the current of the electronic load, replacing the voltage and the current of a load motor in a simulation model with the voltage and the current of the electronic load respectively, and simulating the numerical values of the rotating speed and the torque of the engine to be tested by the simulation model. This patent utilizes voltage current characteristic simulation, has guaranteed experimental security.
Description
Technical Field
The invention relates to the field of fuel cell automobiles, in particular to a test method for the rotating speed and the torque of an engine of a fuel cell automobile.
Background
With the rapid development of fuel cell engine technology, the testing of fuel cell engines is more and more important, but at present, the domestic research on the fuel cell engines is relatively lagged behind.
At present, the mainstream fuel cell automobile test in China is to connect a fuel cell engine consisting of a driver and a motor with a fuel cell and a load motor, and as shown in figure 1, the test system has accurate data, but has more related equipment and higher failure rate.
Disclosure of Invention
The invention aims to provide a control method for a fuel cell automobile engine test bench, which aims to solve the technical problem.
The present invention also provides a fuel cell automobile engine test bench to solve the above technical problems.
The technical problem solved by the invention can be realized by adopting the following technical scheme:
the control method for the fuel cell automobile engine test bench is characterized by comprising the following steps of:
the method comprises the following steps: connecting a fuel cell with a driver of an engine to be tested, connecting a load motor with a motor of the engine to be tested, measuring to obtain the relationship between the voltage and the current of the load motor and the rotating speed and the torque of the engine, and building a simulation model according to the relationship between the voltage and the current of the load motor and the rotating speed and the torque of the engine;
step two: connecting a fuel cell with a driver of an engine to be tested, replacing the motor with an electronic load to connect the motor of the engine to be tested, measuring to obtain the voltage and the current of the electronic load, replacing the voltage and the current of a load motor in a simulation model with the voltage and the current of the electronic load respectively, and simulating the numerical values of the rotating speed and the torque of the engine to be tested by the simulation model.
The first step and the second step of the patent are mutually independent. The simulation model in the step one can be pre-installed in an upper computer of the test bench when the test bench leaves a factory or is installed. Or only pre-installing the model software, and measuring for many times by a user to generate the parameters of the model software to finally form the simulation model. The method of the patent can save a measuring system for the rotating speed and the torque of the engine, and effectively reduce the number of devices on the test bench.
The fuel cell automobile engine test bench comprises a test platform which is fixed and can provide a running environment for an engine of a fuel cell automobile, wherein the test platform comprises a fuel cell and an electronic load;
the test platform also comprises an upper computer, the upper computer is connected with a real-time controller for collecting and controlling signals, and the real-time controller comprises a signal collecting module and a control module;
the method is characterized in that:
simulation model software is installed in the upper computer and can simulate the values of the rotating speed and the torque of the engine according to the input values of the voltage and the current of the electronic load;
the signal acquisition module is connected with the electronic load through the CAN interface and acquires voltage and current signals of the electronic load.
Preferably, the simulation model is built by using Simulink software. The Simulink software is part of the commercial mathematical software available from MathWorks corporation, usa, and mainly serves as a simulation modeling tool in this project.
Preferably, the electronic load may be a load motor. Further preferably, the electronic load is a motor having the same load motor performance and parameters as those used when obtaining the parameters of the simulation model. To further ensure the accuracy of the test data. Of course, there is also the benefit that the test bench can generate the data for building the simulation model software itself.
Has the advantages that: 1. the patent does not need to prepare too much equipment, and the workload before the test can be reduced; 2. the method utilizes voltage and current characteristic simulation to ensure the safety of the test; 3. this patent test data precision is high.
Drawings
Fig. 1 is a schematic circuit connection diagram in the test of the background art.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below.
The control method for the fuel cell automobile engine test board comprises the following steps: connecting a fuel cell with a driver of an engine to be tested, connecting a load motor with a motor of the engine to be tested, measuring to obtain the relationship between the voltage and the current of the load motor and the rotating speed and the torque of the engine, and building a simulation model according to the relationship between the voltage and the current of the load motor and the rotating speed and the torque of the engine; step two: connecting a fuel cell with a driver of an engine to be tested, replacing the motor with an electronic load to connect the motor of the engine to be tested, measuring to obtain the voltage and the current of the electronic load, replacing the voltage and the current of a load motor in a simulation model with the voltage and the current of the electronic load respectively, and simulating the numerical values of the rotating speed and the torque of the engine to be tested by the simulation model. The first step and the second step of the patent are mutually independent. The simulation model in the step one can be pre-installed in an upper computer of the test bench when the test bench leaves a factory or is installed. Or only pre-installing the model software, and measuring for many times by a user to generate the parameters of the model software to finally form the simulation model. The method of the patent can save a measuring system for the rotating speed and the torque of the engine, and effectively reduce the number of devices on the test bench.
The fuel cell automobile engine test bench comprises a test platform which is fixed and can provide a running environment for an engine of a fuel cell automobile, wherein the test platform comprises a fuel cell and an electronic load; the test platform also comprises an upper computer, the upper computer is connected with a real-time controller for collecting and controlling signals, and the real-time controller comprises a signal collecting module and a control module; simulation model software is installed in the upper computer and can simulate the values of the rotating speed and the torque of the engine according to the input values of the voltage and the current of the electronic load; the signal acquisition module is connected with the electronic load through the CAN interface and acquires voltage and current signals of the electronic load.
Simulation models can be built by using Simulink software. The Simulink software is part of the commercial mathematical software available from MathWorks corporation, usa, and mainly serves as a simulation modeling tool in this project. The electronic load may be a load motor. Further preferably, the electronic load is a motor having the same load motor performance and parameters as those used when obtaining the parameters of the simulation model. To further ensure the accuracy of the test data. Of course, there is also the benefit that the test bench can generate the data for building the simulation model software itself.
Question about how to obtain the torque of the engine required by the simulation model software
Detailed description of the preferred embodiment 1
The test platform can be provided with a photoelectric measuring device, the photoelectric measuring device comprises a first rotating shaft, and one end of the first rotating shaft is connected with a rotating shaft of the engine through a coupler. The two ends of the first rotating shaft are respectively sleeved with an annular disc, the central axis of the disc coincides with the central axis of the first rotating shaft, the disc is provided with penetrating strip-shaped light holes in the radial direction, and the light holes are arranged at equal intervals by taking the central axis of the first rotating shaft as the center to form an annular shape. The photoelectric measuring device further comprises a base, two supporting frames are installed on the base, a light-emitting element is installed on one supporting frame, a photosensitive element is installed on the other supporting frame, the light-emitting element and the photosensitive element share the same optical axis, the light-emitting element and the photosensitive element are both connected with a signal processing module, and the signal processing module is connected with an upper computer. The base has two, and the position corresponds with two discs one-to-one, and light emitting component and the photosensitive element on the base are located the both sides of disc respectively, and light emitting component to the minimum distance of base, be greater than that the minimum distance that is located the light trap of below to the base, but be less than that the maximum distance that is located the light trap of below to the base. During the use, the motor shaft drives first pivot and rotates, and first pivot drives the disc on it and rotates, and like this, when the light trap on the disc was located between light emitting component and the light sensitive element, the light sensitive element can receive light emitting component's signal, and after the light trap on the disc rotated away, the light sensitive element can not receive light emitting component's signal to the signal processing module output pulse signal who makes gives the host computer. The two photosensitive elements are influenced by the torque of the rotating shaft due to different positions of the disks, so that phase difference exists between output pulse signals, and the torque can be calculated by utilizing the phase difference. The method has simple structure and convenient installation.
The lower part of the base can be provided with a plug-in unit in a plug shape, a socket-shaped connecting piece matched with the plug-in unit is preferably arranged on the test platform, and the base is detachably fixed on the test platform through the plug-in unit and the connecting piece. Therefore, the parameters required by the simulation software can be conveniently removed after the parameters are obtained. Preferably, the metal sheet is arranged at the corresponding position of the connecting piece and the plug-in unit, the metal sheet positioned on the connecting piece is connected with the light-emitting element and the photosensitive element, and the metal sheet positioned on the plug-in unit is connected with the signal processing module. Thereby make things convenient for the transmission of signal of telecommunication, avoid causing the confusion because of the wiring. The number of the plug-in components can be at least four, so that different plug-in components can be conveniently selected according to different requirements, the position of the measured rotating shaft can be adjusted, a plurality of plug-in components can be simultaneously inserted, two first rotating shafts are used, the two first rotating shafts are connected through the coupler, measuring points are increased, and the measuring accuracy is guaranteed.
In order to avoid the measuring error caused by the dead weight of the first rotating shaft, a disc can be arranged on the coupler or can be directly arranged on the rotating shaft of the motor. At this time, the base and the detecting element are arranged at the corresponding position of the disc. Of course, the first rotating shaft can be made of a lighter material. Preferably, the disc is not directly mounted on the motor shaft, but only on the first shaft as described in this patent, thereby facilitating modular installation and reducing the number of components that need to be separately installed. When the first rotating shaft with the heavier weight is adopted, a revision value can be set in simulation model software to correct the influence of the self weight of the first rotating shaft on the torque.
An inner groove used for containing the end part of the rotating shaft of the motor is formed in at least one end part of the first rotating shaft, notches are formed in the groove wall of the inner groove at equal intervals, a clamping jaw structure is formed, a nut is sleeved on the clamping jaw structure, the inner diameter of the nut is gradually reduced from one end to the other end, an inner thread is arranged on the inner side wall of the nut, and an outer thread is arranged on the clamping jaw structure. Therefore, the size of the inner diameter of the claw structure is adjusted by utilizing the threaded connection depth of the nut and the claw structure, the first rotating shaft is finally firmly connected with the motor rotating shaft through the claw structure and the nut, and the central axes of the first rotating shaft and the motor rotating shaft are kept on the same straight line as much as possible.
Specific example 2
The testing platform is fixed with a base, the base is provided with two supporting frames, one supporting frame is provided with a light-emitting element, the other supporting frame is provided with a photosensitive element, the light-emitting element and the photosensitive element share an optical axis, the light-emitting element and the photosensitive element are both connected with a signal processing module, and the signal processing module is connected with an upper computer. The last cover of motor shaft is equipped with and is pipy siphonozooid, and the one end of siphonozooid is equipped with the breach along the equidistant axial to form the jack catch structure, the motor shaft still overlaps outward and is equipped with the nut, and the nut internal diameter reduces gradually from one end to the other end, is equipped with the internal thread on the inside wall of nut, the structural external screw thread that matches with the internal thread that is equipped with of jack catch. The nut is sleeved with an annular disc, the central axis of the disc coincides with the central axis of the nut, the disc is provided with penetrating strip-shaped light holes in the radial direction, and the light holes are arranged at equal intervals by taking the central axis of the nut as the center to form an annular shape. The disk is arranged above the base, and the light-emitting element and the receiving element are arranged on two sides of the disk.
The minimum distance from the light-emitting element to the base is larger than the minimum distance from the light-transmitting hole positioned at the lowest part to the base, but is smaller than the maximum distance from the light-transmitting hole positioned at the lowest part to the base. During the use, the motor shaft drives the siphonozooid and rotates, and the siphonozooid drives the nut on it and rotates, and the disc that the nut drove on it rotates, and like this, when the light trap on the disc was located between light emitting component and the light sensitive element, the light sensitive element can receive light emitting component's signal, and after the light trap on the disc rotated away, the light sensitive element can not receive light emitting component's signal to the signal processing module output pulse signal who makes gives the host computer. Two groups of the products are arranged on the motor rotating shaft, and the positions of the two products are different, so that the output pulse signals have phase difference under the influence of the torque of the rotating shaft, and the torque can be calculated by utilizing the phase difference. The method has simple structure and convenient installation.
The outer contours of two ends of the nut are preferably in a regular hexagon shape, and the middle of the nut is circular. The outer contour of the other end of the tubular body may be a regular hexagonal shape. Therefore, the nut and the tubular body can be clamped by using a tool respectively, and the threaded insertion depth of the nut and the tubular body can be conveniently adjusted.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The control method for the fuel cell automobile engine test bench is characterized by comprising the following steps of:
the method comprises the following steps: connecting a fuel cell with a driver of an engine to be tested, connecting a load motor with a motor of the engine to be tested, measuring to obtain the relationship between the voltage and the current of the load motor and the rotating speed and the torque of the engine, and building a simulation model according to the relationship between the voltage and the current of the load motor and the rotating speed and the torque of the engine;
step two: connecting a fuel cell with a driver of an engine to be tested, replacing the motor with an electronic load to connect the motor of the engine to be tested, measuring to obtain the voltage and the current of the electronic load, replacing the voltage and the current of a load motor in a simulation model with the voltage and the current of the electronic load respectively, and simulating the numerical values of the rotating speed and the torque of the engine to be tested by the simulation model.
2. The control method for a fuel cell vehicle engine test stand according to claim 1, characterized in that: the test platform is provided with a photoelectric measuring device, the photoelectric measuring device comprises a first rotating shaft, and one end of the first rotating shaft is connected with a rotating shaft of the engine through a coupler;
the two ends of the first rotating shaft are respectively sleeved with an annular disc, the central axis of the disc is superposed with the central axis of the first rotating shaft, strip-shaped light holes penetrating through the disc are formed in the radial direction of the disc, and the light holes are arranged at equal intervals by taking the central axis of the first rotating shaft as the center to form an annular shape;
the photoelectric measuring device also comprises a base, wherein two support frames are arranged on the base, a light-emitting element is arranged on one support frame, a photosensitive element is arranged on the other support frame, the light-emitting element and the photosensitive element share an optical axis, the light-emitting element and the photosensitive element are both connected with a signal processing module, and the signal processing module is connected with an upper computer;
the base has two, and the position corresponds with two discs one-to-one, and light emitting component and the photosensitive element on the base are located the both sides of disc respectively, and light emitting component to the minimum distance of base, be greater than that the minimum distance that is located the light trap of below to the base, but be less than that the maximum distance that is located the light trap of below to the base.
3. The control method for a fuel cell vehicle engine test stand according to claim 2, characterized in that: the lower side of base is equipped with the plug-in components that are the plug form, is equipped with the union piece that is socket form with plug-in components supporting on the test platform, and the base passes through plug-in components, union piece detachable to be fixed on test platform.
4. The control method for a fuel cell vehicle engine test stand according to claim 3, characterized in that: the metal sheet is arranged on the corresponding position of the connecting piece and the plug-in piece, the metal sheet on the connecting piece is connected with the light-emitting element and the photosensitive element, and the metal sheet on the plug-in piece is connected with the signal processing module.
5. The control method for a fuel cell vehicle engine test stand according to claim 1, characterized in that: a base is fixed on the test platform, two support frames are arranged on the base, a light-emitting element is arranged on one support frame, a photosensitive element is arranged on the other support frame, the light-emitting element and the photosensitive element share an optical axis, the light-emitting element and the photosensitive element are both connected with a signal processing module, and the signal processing module is connected with an upper computer;
the motor rotating shaft is sleeved with a tubular body, one end of the tubular body is provided with notches at equal intervals along the axial direction, so that a clamping jaw structure is formed, the motor rotating shaft is sleeved with a nut, the inner diameter of the nut is gradually reduced from one end to the other end, the inner side wall of the nut is provided with an internal thread, and the clamping jaw structure is provided with an external thread matched with the internal thread;
the nut is sleeved with an annular disc, the central axis of the disc is superposed with the central axis of the nut, strip-shaped light holes penetrating through the disc are formed in the radial direction of the disc, and the light holes are arranged at equal intervals by taking the central axis of the nut as the center to form an annular shape;
the disk is arranged above the base, and the light-emitting element and the receiving element are arranged on two sides of the disk.
6. The control method for a fuel cell vehicle engine test stand according to claim 5, characterized in that: the minimum distance from the light-emitting element to the base is larger than the minimum distance from the light-transmitting hole positioned at the lowest part to the base, but is smaller than the maximum distance from the light-transmitting hole positioned at the lowest part to the base.
7. The control method for a fuel cell vehicle engine test stand according to claim 6, characterized in that: the outer contours of two ends of the nut are in a regular hexagon shape, and the middle of the nut is in a circular shape;
the outer contour of the other end of the tubular body is also in a regular hexagonal shape.
8. The fuel cell automobile engine test bench comprises a test platform which is fixed and can provide a running environment for an engine of a fuel cell automobile, wherein the test platform comprises a fuel cell and an electronic load;
the test platform also comprises an upper computer, the upper computer is connected with a real-time controller for collecting and controlling signals, and the real-time controller comprises a signal collecting module and a control module;
the method is characterized in that:
simulation model software is installed in the upper computer and can simulate the values of the rotating speed and the torque of the engine according to the input values of the voltage and the current of the electronic load;
the signal acquisition module is connected with the electronic load through the CAN interface and acquires voltage and current signals of the electronic load.
9. The fuel cell vehicle engine test stand according to claim 8, wherein the electrical load is a load motor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010640923.9A CN113899551A (en) | 2020-07-06 | 2020-07-06 | Control method for fuel cell automobile engine test bench and test bench |
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| CN202010640923.9A CN113899551A (en) | 2020-07-06 | 2020-07-06 | Control method for fuel cell automobile engine test bench and test bench |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101546352A (en) * | 2009-04-10 | 2009-09-30 | 清华大学 | Type selection method for auxiliary power units of series-type hybrid vehicles |
| CN101837548A (en) * | 2010-05-31 | 2010-09-22 | 黄山高艺精密制造有限公司 | Positioning preparing jaw frame |
| CN102393268A (en) * | 2011-11-14 | 2012-03-28 | 南京航空航天大学 | Apparatus used for measuring ultra-high rotating speed impeller spindle torque |
| US20180017630A1 (en) * | 2014-03-14 | 2018-01-18 | Avil List Gmbh | Energy Accumulator Emulator and Method for Emulation of an Energy Accumulator Emulator |
| CN108344575A (en) * | 2017-12-28 | 2018-07-31 | 上海神力科技有限公司 | A kind of test device for fuel battery engines |
-
2020
- 2020-07-06 CN CN202010640923.9A patent/CN113899551A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101546352A (en) * | 2009-04-10 | 2009-09-30 | 清华大学 | Type selection method for auxiliary power units of series-type hybrid vehicles |
| CN101837548A (en) * | 2010-05-31 | 2010-09-22 | 黄山高艺精密制造有限公司 | Positioning preparing jaw frame |
| CN102393268A (en) * | 2011-11-14 | 2012-03-28 | 南京航空航天大学 | Apparatus used for measuring ultra-high rotating speed impeller spindle torque |
| US20180017630A1 (en) * | 2014-03-14 | 2018-01-18 | Avil List Gmbh | Energy Accumulator Emulator and Method for Emulation of an Energy Accumulator Emulator |
| CN108344575A (en) * | 2017-12-28 | 2018-07-31 | 上海神力科技有限公司 | A kind of test device for fuel battery engines |
Non-Patent Citations (1)
| Title |
|---|
| 张洋: "基于行为模型的电机动态扭矩测试研究", 中国测试, pages 10 - 15 * |
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