CN113138083A - Test system and test method for whole vehicle hub and power assembly - Google Patents
Test system and test method for whole vehicle hub and power assembly Download PDFInfo
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- CN113138083A CN113138083A CN202110320566.2A CN202110320566A CN113138083A CN 113138083 A CN113138083 A CN 113138083A CN 202110320566 A CN202110320566 A CN 202110320566A CN 113138083 A CN113138083 A CN 113138083A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/013—Wheels
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Abstract
The invention discloses a test system and a test method for a whole vehicle hub and a power assembly, and the test system comprises a power measuring unit, a power measuring unit and a power control unit, wherein the power measuring unit is used for transmitting the rotating speed and the torque value of an engine to a rack controller and simulating different road load environments or transmitting the rotating speed and the torque value of the power assembly to the rack controller and simulating an engine characteristic curve and different road load environments; the frequency converter unit is used for providing power for the dynamometer unit and adjusting the rotating speed of the dynamometer unit; the bench controller is connected with the industrial personal computer and used for receiving the rotating speed and the torque value transmitted by the dynamometer unit and controlling the dynamometer unit to simulate different road load environments or simulate an engine characteristic curve and different road load environments through the frequency converter unit. The invention has the advantages of good test consistency, high test precision, simple and reliable switching of two test states, capability of carrying out two types of tests by one set of test system and lower cost.
Description
Technical Field
The invention belongs to the technical field of automobile tests and tests, and particularly belongs to a test system and a test method for a whole automobile hub and a power assembly.
Background
At present, most chassis dynamometers are adopted for testing the interior of a whole vehicle chamber, and the chassis dynamometers can test the performance of the whole vehicle, but have some defects: the adaptability is poor, the requirements on the whole wheel base and the wheel base are met, the tire and the dynamometer hub slide, and the testing precision is low. The bench dynamometer can only test the power assembly, although the consistency is good, the test environment of the whole vehicle and a road cannot be completely simulated, and the matching test of the whole vehicle is required to be carried out subsequently. Therefore, the comprehensive test system capable of freely switching between the hub test system and the power assembly test system can greatly save the cost.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a test system and a test method for a whole vehicle hub and a power assembly, and solves the problem that the cost is high because the current whole vehicle hub and the power assembly need to be carried out by using two test systems.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a whole car wheel hub and power assembly test system, includes industrial computer and rack controller, industrial computer and rack controller communication, the signal output part and the converter unit connection of rack controller, the converter unit is used for receiving rack controller's rotational speed and torque signal and adjusts dynamometer unit's moment of torsion and rotational speed, dynamometer unit and converter unit still pass through cable junction, the test end connection of dynamometer unit is surveyed vehicle or power assembly, dynamometer unit's signal output part passes through dynamometer torque signal and rack controller communication, dynamometer unit is used for the rotational speed and the torque value of being surveyed vehicle or power assembly to rack controller transmission.
Furthermore, the industrial personal computer is also connected with a temperature control unit or a fluid temperature control unit, the temperature control unit comprises a temperature control unit, the temperature control unit is connected with the axial flow fan, and the temperature control unit is used for controlling the rotating speed of the axial flow fan;
the fluid temperature control unit is connected with the power assembly through a strong electric cable and is used for controlling the temperature of fluid in the power assembly.
Further, still be connected with the measurement box on the industrial computer, it connects between temperature control unit and industrial computer or between fluid temperature control unit and the industrial computer to measure the box, it is used for carrying out data acquisition to temperature control unit or fluid temperature control unit to measure the box, and with data transmission to the industrial computer of gathering and save.
Furthermore, the industrial personal computer is also connected with a PLC unit, and the PLC unit is used for carrying out auxiliary operation on the rack controller.
Further, the dynamometer unit comprises a first dynamometer, a second dynamometer, a third dynamometer and a fourth dynamometer;
the first dynamometer, the second dynamometer, the third dynamometer and the fourth dynamometer are respectively connected with four half shafts of the tested vehicle or the first dynamometer and the second dynamometer are respectively connected with two half shafts of the tested vehicle.
Furthermore, four half shafts of the vehicle to be measured are respectively connected with the first dynamometer, the second dynamometer, the third dynamometer and the fourth dynamometer through flange adapters, or the first dynamometer and the second dynamometer are respectively connected with two half shafts of the vehicle to be measured through flange adapters.
Further, the dynamometer unit comprises a first dynamometer, a second dynamometer, a third dynamometer and a fourth dynamometer;
the first dynamometer is connected with the input end of the power assembly, the second dynamometer is connected with the output end of the power assembly, and the first dynamometer and the second dynamometer (7) are used for inputting rotating speed and torque signals to the power assembly.
Furthermore, the first dynamometer and the second dynamometer are connected with the tested power assembly through adapters.
Further, the first dynamometer, the second dynamometer, the third dynamometer and the fourth dynamometer are respectively installed on independent moving devices.
The invention also provides a test method of the whole vehicle hub and power assembly test system, which comprises the following steps:
when the whole vehicle hub is tested, the dynamometer unit is respectively connected with two half shafts or four half shafts of a tested vehicle, the dynamometer unit tests the rotating speed and the torque value of an engine of the tested vehicle and sends the rotating speed and the torque value to the rack controller, the rack controller transmits a rotating speed and torque control signal to the frequency converter unit, the frequency converter unit adjusts the torque and the rotating speed of the dynamometer unit, and the dynamometer unit loads wheels of the tested vehicle; (ii) a
When the power assembly is tested, the input end and the output end of the power assembly are both connected with a power measuring unit, a rack controller (2) transmits a rotating speed and a torque control signal to a frequency converter unit, the frequency converter unit adjusts the torque and the rotating speed of the power measuring unit, the power measuring unit loads the power assembly (12), and the power measuring unit connected with the output end of the power assembly is used for simulating different road load environments and sending the rotating speed and the torque value of the power assembly to the rack controller.
Compared with the prior art, the invention has at least the following beneficial effects:
the invention provides a test system for a whole vehicle hub and a power assembly, which realizes the test of the whole vehicle hub and the power assembly by the cooperation of a rack controller, a frequency converter unit and a dynamometer unit, wherein the frequency converter unit provides electric energy for the dynamometer unit and simultaneously adjusts the rotating speed of the dynamometer unit, the rack controller controls the dynamometer unit to simulate different road load environments or simulate an engine characteristic curve and different road load environments by the frequency converter unit, the dynamometer unit is freely selected to simulate the road load environment according to the condition that a tested vehicle is driven by two or four wheels, the application range is wider, meanwhile, when the whole vehicle hub is tested, the dynamometer unit can simulate the road load environment, when the power assembly is tested, the drive unit simulates the engine or the motor characteristic curve, the loading unit simulates the road load resistance of the vehicle, and the road environment of the whole vehicle can be simulated by a single test system, the purpose of testing the whole vehicle is achieved, the testing consistency is good, the testing precision is high, the two testing states are switched simply and reliably, one set of testing system can carry out two types of tests, and the cost is lower.
Furthermore, the testing system is also provided with a temperature control unit and a fluid temperature control unit, the temperature control unit controls the axial flow fan, the air resistance received by the vehicle can be simulated through the axial flow fan, the fluid temperature control unit can control the temperature of fluid in the power assembly, when the wheel hub of the whole vehicle is tested, the road load resistance can be comprehensively simulated through the power measuring unit and the temperature control unit, the wheel hub of the whole vehicle is tested, when the power assembly is tested, the power assembly is tested through the cooperation of the fluid temperature control unit and the power measuring unit, and the testing precision is higher.
Furthermore, the measuring box connected to the industrial personal computer can acquire data of the temperature control unit or the fluid temperature control unit, can record data of each sensor in real time, and is beneficial to data analysis in the later period and product performance optimization.
Furthermore, the dynamometer unit and the vehicle to be tested or the dynamometer unit and the power assembly to be tested are connected through appropriate adapters, and the device is simple, reliable, convenient and fast to install.
Furthermore, the dynamometer unit is directly connected with a half shaft of the vehicle to be tested, the problem that tires and power hubs slip during the current hub test is solved, and the test precision is higher.
Furthermore, the dynamometer unit is installed on the mobile device, is convenient to move, can be applicable to different wheelbases and wheel track tests, and has a wider application range, and meanwhile, the movement of the dynamometer unit can meet the requirements of outdoor tests.
Drawings
FIG. 1 is a diagram of a vehicle hub testing system;
FIG. 2 is a diagram of a powertrain testing system;
in the drawings: the method comprises the following steps of 1-an industrial personal computer, 2-a rack controller, 3-a measuring box, 4-a temperature control unit, 5-an axial flow fan, 6-a first dynamometer, 7-a second dynamometer, 8-a third dynamometer, 9-a fourth dynamometer, 10-a vehicle to be measured, 11-a tail gas exhaust device, 12-a power assembly and 13-a fluid temperature control unit.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
The invention provides a whole vehicle hub and power assembly testing system, which mainly completes the whole vehicle performance test and the endurance test when the whole vehicle hub is tested, utilizes 4 dynamometer units to carry out 2-drive mode or 4-drive mode test on a 2-shaft whole vehicle, and simultaneously, a dynamometer unit and an axial flow fan unit can simulate the road load condition and simulate a real road;
during the test of the power assembly, the performance and durability test of the power assembly is mainly finished, two units in 4 dynamometer units are utilized, one unit is used as a driving unit, the other unit is used as a loading unit, the driving unit simulates the characteristic curve of an engine or a motor, and the loading unit simulates the road load resistance of a vehicle to finish the performance and durability test of the power assembly.
As shown in fig. 1, when used as a test system for a whole vehicle hub, the test system specifically comprises a dynamometer unit, a frequency converter unit, a data acquisition system, a rack controller 2, a PLC unit and a temperature control system;
a dynamometer unit: the system mainly loads the whole wheel edge in the whole vehicle test and can simulate different road load environments, the dynamometer unit is in torque signal communication with the rack controller 2 through the dynamometer, and the dynamometer unit transmits the rotating speed and the torque value of an engine to the rack controller 2.
A frequency converter unit: by first converter, second converter, third converter and fourth converter are constituteed, the converter passes through the forceful electric power cable and connects for the dynamometer power supply with the dynamometer, and the converter adjusts the rotational speed for the dynamometer through dynamometer rotational speed signal and dynamometer communication in addition, satisfies the control demand, and converter unit and rack controller 2 pass through the CAN communication, and rack controller 2 simulates different road load environment through converter unit control dynamometer unit.
A data acquisition system: mainly constitute by measuring box 3, measuring box 3 is used for carrying out data acquisition to temperature control unit 4 or fluid temperature control unit 13, satisfies in this embodiment to the measurement such as the current of temperature control unit 4, voltage, pressure, temperature, flow, transmits to industrial computer 1 through the CAN communication simultaneously, accomplishes data acquisition and storage work.
Stage controller 2: the bench controller 2 communicates with the industrial personal computer 1 through Ethernet, the rotating speed and torque values transmitted by the first dynamometer 6, the second dynamometer 7, the third dynamometer 8 and the fourth dynamometer 9 are sent to the bench controller 2 through dynamometer torque signals, the bench controller 2 transmits control signals to the frequency converter through CAN communication through a PID algorithm, and then the rotating speed of the dynamometer units is adjusted through the frequency converter so as to control the rotating speed and torque of the first dynamometer 6, the second dynamometer 7, the third dynamometer 8 and the fourth dynamometer 9, so that different road load environments are simulated and the rotation speed and torque of the first dynamometer 6, the second dynamometer 7, the third dynamometer 8 and the fourth dynamometer 9 work cooperatively; the industrial personal computer 1 is also connected with a UPS, and the UPS is responsible for supplying power for the industrial personal computer temporarily when emergency power failure occurs.
A PLC unit: mainly constitute by rack PLC IO interface, PLC IO interface and PLC controller, mainly carry out the auxiliary system's of rack control, like emergency stop switch, manual operation panel etc. PLC unit and rack controller 2 all communicate through Profi-bus and industrial computer 1.
And the temperature control unit 4 is composed of a temperature control unit, the temperature control unit is communicated with the industrial personal computer 1 through a CAN, and the temperature control unit is also connected with the axial flow fan 5 and mainly used for controlling the rotating speed of the axial flow fan 5 and simulating the air resistance of the vehicle.
The test method of the whole vehicle hub test system comprises the following steps: four half shafts of a tested vehicle 10 are respectively connected with a first dynamometer 6, a second dynamometer 7, a third dynamometer 8 and a fourth dynamometer 9 through flange adapters, and the first dynamometer 6, the second dynamometer 7, the third dynamometer 8 and the fourth dynamometer 9 are respectively installed on a moving device, wherein in the embodiment, the moving device selects a moving trolley; the moving device can move the first dynamometer 6, the second dynamometer 7, the third dynamometer 8 and the fourth dynamometer 9 on the horizontal plane, and the whole vehicle mounting work of different wheelbases and wheel track measurement is met. The dynamometer unit can absorb the power of 4 wheel sides of the whole vehicle, the first dynamometer 6 and the second dynamometer 7 can be used for carrying out vehicle operation on 2-axis vehicles, and meanwhile, the test system has the function of simulating road resistance (rolling resistance, acceleration resistance, gradient resistance and the like). And simultaneously measuring the rotating speed and the torque value of 2 or 4 wheel edges of the whole vehicle, and sending the rotating speed and the torque value to the rack controller 2 to form closed-loop control. Meanwhile, the rotating speed of the axial flow fan 5 is controlled by setting parameters, and air resistance is simulated. The exhaust gas emitted from the vehicle 10 to be tested is discharged to the outdoor atmosphere (if any) through an exhaust gas discharge device. The performance and durability test work of the whole vehicle is completed.
As shown in fig. 2, when the powertrain testing system performs a test, the powertrain testing system includes a dynamometer unit, a frequency converter unit, a data acquisition system, a bench controller, a bench PLC interface, and a fluid temperature control system;
a dynamometer unit: the test device mainly completes the test work of the power assembly and comprises a first dynamometer 6 and a second dynamometer 7, wherein the first dynamometer 6 simulates an engine characteristic curve, the second dynamometer 7 is used for simulating different road load environments, so that a test environment is built, the performance and reliability test of the power assembly is met, a dynamometer unit is in torque signal communication with the rack controller 2 through the dynamometers, and the dynamometer unit transmits the rotating speed and the torque value of the power assembly to the rack controller 2.
A frequency converter unit: constitute by first converter and second converter, the converter passes through the forceful electric power cable and is connected for the dynamometer machine power supply with the dynamometer machine, and the converter transfers for the dynamometer machine through dynamometer machine speed signal and dynamometer machine communication and connects the rotational speed in addition, satisfies the control demand, and converter unit and rack controller 2 pass through the CAN communication, and rack controller 2 passes through the converter unit control dynamometer unit and simulates different road load environment.
A data acquisition system: the device mainly comprises a measuring box 3, meets the requirements of measuring current, voltage, pressure, temperature, flow and the like of a fluid temperature control unit 13, and simultaneously transmits the current, voltage, pressure, temperature, flow and the like to an industrial personal computer 1 through CAN communication to finish data acquisition and storage work.
Stage controller 2: the bench controller 2 communicates with the industrial personal computer 1 through Ethernet, the rotating speed and torque value transmitted by the first dynamometer 6 and the second dynamometer 7 are sent to the bench controller through a dynamometer torque signal, the bench controller 2 transmits a control signal to the frequency converter through CAN communication through a PID algorithm, and then the frequency converter adjusts the rotating speed of the dynamometer unit so as to control the rotating speed and torque of the first dynamometer 6 and the second dynamometer 7, so that the dynamometer CAN simulate an engine characteristic curve and different road load environments and work cooperatively; the industrial computer is also connected with a UPS, and the UPS is responsible for supplying power for the industrial computer temporarily when emergency power failure occurs.
A PLC unit: mainly constitute by rack PLC IO interface, PLC IO interface and PLC controller, mainly carry out the auxiliary system's of rack control, like emergency stop switch, manual operation panel etc. PLC unit and rack controller 2 all communicate through Profi-bus and industrial computer.
Fluid temperature control system: and according to the target fluid temperature, the fluid temperature in the power assembly is controlled in a closed loop manner, so that the requirement is met.
The test method of the power assembly test system comprises the following steps: the input end of a tested power assembly is connected with the first dynamometer 6 through an adapter, the output end of the power assembly 12 is connected with the second dynamometer 7, CAN communication between the power assembly 12 and the fluid temperature control unit 13 is completed simultaneously, the building work of the bench is completed, the first dynamometer 6 simulates functions of an engine characteristic curve and the like, the second dynamometer 7 simulates different road load environments (rolling resistance, acceleration resistance, gradient resistance, air resistance and the like), and the rotating speed and the torque value of the input end and the output end of the power assembly are measured simultaneously and sent to the bench controller 2, so that closed-loop control is formed. The performance and durability test work of the power assembly is completed.
The invention is convenient to switch between the whole vehicle hub testing system and the power assembly testing system,
when the whole vehicle hub is tested, the dynamometer unit and the axial flow fan 5 unit can simulate road load;
when the power assembly is tested, the driving unit simulates the characteristic curve of an engine or a motor, and the loading unit simulates the load resistance of a vehicle road; the two test states are simple and reliable when switched.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a whole car wheel hub and powertrain test system, its characterized in that, includes industrial computer (1) and rack controller (2), industrial computer (1) and rack controller (2) communication, the signal output part and the converter unit of rack controller (2) are connected, the converter unit is used for receiving the rotational speed and the torque signal of rack controller (2) and adjusts dynamometer unit's moment of torsion and rotational speed, dynamometer unit and converter unit still pass through cable junction, dynamometer unit's test end is connected and is surveyed vehicle (10) or powertrain (12), dynamometer unit's signal output part passes through dynamometer machine torque signal and rack controller (2) communication, dynamometer unit is used for transmitting the rotational speed and the torque value of being surveyed vehicle (10) or powertrain (12) to rack controller (2).
2. The vehicle hub and power assembly testing system according to claim 1, wherein the industrial personal computer (1) is further connected with a temperature control unit (4) or a fluid temperature control unit (13), the temperature control unit (4) comprises a temperature control unit, the temperature control unit is connected with the axial flow fan (5), and the temperature control unit is used for controlling the rotating speed of the axial flow fan (5);
the fluid temperature control unit (13) is connected with the power assembly (12) through a strong electric cable, and the fluid temperature control unit (13) is used for controlling the temperature of fluid in the power assembly (12).
3. The whole vehicle hub and power assembly testing system of claim 2, characterized in that the industrial personal computer (1) is further connected with a measuring box (3), the measuring box (3) is connected between the temperature control unit (4) and the industrial personal computer (1) or between the fluid temperature control unit (13) and the industrial personal computer (1), and the measuring box (3) is used for collecting data of the temperature control unit (4) or the fluid temperature control unit (13) and transmitting the collected data to the industrial personal computer (1) for storage.
4. The finished automobile hub and power assembly testing system according to claim 1, wherein the industrial personal computer (1) is further connected with a PLC unit, and the PLC unit is used for performing auxiliary operation on the rack controller (2).
5. The finished vehicle hub and powertrain testing system of claim 1, wherein the dynamometer units include a first dynamometer machine (6), a second dynamometer machine (7), a third dynamometer machine (8), and a fourth dynamometer machine (9);
the first dynamometer (6), the second dynamometer (7), the third dynamometer (8) and the fourth dynamometer (9) are respectively connected with four half shafts of the tested vehicle (10) or the first dynamometer (6) and the second dynamometer (7) are respectively connected with two half shafts of the tested vehicle (10).
6. A whole vehicle wheel hub and powertrain testing system of claim 5, characterized in that four half-shafts of the vehicle under test (10) are connected through a flange adapter and the first dynamometer (6), the second dynamometer (7), the third dynamometer (8) and the fourth dynamometer (9) respectively or the first dynamometer (6) and the second dynamometer (7) are connected through a flange adapter respectively with two half-shafts of the vehicle under test (10).
7. The finished vehicle hub and powertrain testing system of claim 1, wherein the dynamometer units include a first dynamometer machine (6), a second dynamometer machine (7), a third dynamometer machine (8), and a fourth dynamometer machine (9);
the first dynamometer (6) is connected with the input end of the power assembly (12), the second dynamometer (7) is connected with the output end of the power assembly (12), and the first dynamometer (6) and the second dynamometer (7) are used for inputting rotating speed and torque signals to the power assembly.
8. The vehicle wheel hub and powertrain testing system of claim 7, wherein the first dynamometer machine (6) and the second dynamometer machine (7) are both connected to the powertrain (12) through adapters.
9. A complete vehicle wheel hub and powertrain test system according to claim 5 or 7, characterized in that first dynamometer (6), second dynamometer (7), third dynamometer (8) and fourth dynamometer (9) are installed on independent mobile device respectively.
10. The method for testing the whole vehicle hub and powertrain testing system of any one of claims 1-9, comprising the steps of:
when the whole vehicle hub is tested, the dynamometer units are respectively connected with two half shafts or four half shafts of a tested vehicle (10), the dynamometer units test the rotating speed and the torque value of an engine of the tested vehicle (10) and send the rotating speed and the torque value to the rack controller (2), the rack controller (2) transmits a rotating speed and torque control signal to the frequency converter unit, the frequency converter unit adjusts the torque and the rotating speed of the dynamometer units, and the dynamometer units load wheels of the tested vehicle;
when the power assembly (12) is tested, the input end and the output end of the power assembly (12) are both connected with a dynamometer unit, the rack controller (2) transmits a rotating speed and torque control signal to the frequency converter unit, the frequency converter unit adjusts the torque and the rotating speed of the dynamometer unit, the dynamometer unit loads the power assembly (12) and sends the rotating speed and the torque value of the power assembly (12) to the rack controller (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110320566.2A CN113138083A (en) | 2021-03-25 | 2021-03-25 | Test system and test method for whole vehicle hub and power assembly |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110320566.2A CN113138083A (en) | 2021-03-25 | 2021-03-25 | Test system and test method for whole vehicle hub and power assembly |
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| CN114778141A (en) * | 2022-06-17 | 2022-07-22 | 岚图汽车科技有限公司 | Method, device and equipment for formulating durability test of automobile electric drive assembly rack |
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