CN117554064A - Transmission testing device and testing method - Google Patents
Transmission testing device and testing method Download PDFInfo
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- CN117554064A CN117554064A CN202311506453.7A CN202311506453A CN117554064A CN 117554064 A CN117554064 A CN 117554064A CN 202311506453 A CN202311506453 A CN 202311506453A CN 117554064 A CN117554064 A CN 117554064A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 195
- 238000012360 testing method Methods 0.000 title claims abstract description 153
- 238000004891 communication Methods 0.000 claims abstract description 28
- 238000005259 measurement Methods 0.000 claims abstract description 21
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 20
- 239000003921 oil Substances 0.000 claims description 63
- 238000004088 simulation Methods 0.000 claims description 34
- 238000004364 calculation method Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 230000017525 heat dissipation Effects 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000010998 test method Methods 0.000 claims description 4
- 239000010687 lubricating oil Substances 0.000 claims description 2
- 238000012821 model calculation Methods 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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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
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/025—Test-benches with rotational drive means and loading means; Load or drive simulation
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Abstract
The application relates to a transmission testing device and a testing method. The transmission testing device comprises a testing bench, a power input module, an oil temperature measurement and control module, a power output module, a bench control module and a bench measurement module. The test bench is used for bearing the speed changer; the power input module is used for being connected with the input end of the speed changer and providing power for the speed changer; the oil temperature measurement and control module is connected with the transmission and used for controlling the oil inlet temperature of the transmission; the power output module is used for being connected with the output end of the speed changer and providing resistance for the speed changer; the rack control module is respectively in communication connection with the power input module, the oil temperature measurement and control module and the power output module so as to simulate the working condition of a real vehicle; the rack measurement module is in communication connection with the transmission and is used for testing operation signals of the transmission under the actual vehicle condition. The transmission testing device can simulate real vehicle working conditions more accurately, and accuracy of transmission testing results is improved.
Description
Technical Field
The application relates to the technical field of transmission testing, in particular to a transmission testing device and a transmission testing method.
Background
For a long time, the transmission efficiency of an automatic transmission or a manual transmission is tested under a fixed working condition, such as a fixed gear, input torque, rotating speed, oil temperature and horizontal installation angle, and is usually tested under a variable working condition when a real vehicle is used, so that a measuring element is not easy to arrange under the real vehicle working condition, the feasibility of testing the efficiency of the transmission by the real vehicle is restricted, and the accuracy of a transmission test result is influenced.
Disclosure of Invention
Based on the above, the transmission testing device and the transmission testing method can simulate the actual vehicle working condition and improve the accuracy of the transmission testing result.
An embodiment of a first aspect of the present application proposes a transmission testing device comprising:
the test bench is used for bearing the speed changer;
the power input module is used for being connected with the input end of the transmission and providing power for the transmission;
the oil temperature measurement and control module is connected with the speed changer and used for controlling the oil inlet temperature of the speed changer;
the power output module is used for being connected with the output end of the transmission and providing resistance for the transmission;
the rack control module is respectively in communication connection with the power input module, the oil temperature measurement and control module and the power output module so as to simulate the working condition of a real vehicle;
the rack measurement module is in communication connection with the transmission, and the rack measurement module tests operation signals of the transmission under the actual vehicle condition.
According to the transmission testing device, the power input module is used for providing power for the transmission and is used for simulating an engine; the power output module provides resistance for the transmission and is used for simulating road resistance received in the running process of the vehicle; the oil temperature measurement and control module controls the oil inlet temperature of the transmission, so that the transmission is better close to the actual vehicle working condition during testing; the bench control module controls the transmission testing device to simulate the actual vehicle working condition, and the bench measurement module tests the running signal of the transmission under the actual vehicle working condition to obtain an accurate test result. The transmission testing device can simulate real vehicle working conditions more accurately, and accuracy of transmission testing results is improved.
In one embodiment, the power input module includes an input motor coupled to an input of the transmission to provide the power to the transmission.
In one embodiment, the oil temperature measurement and control module includes:
the oil temperature detection piece is used for detecting the oil inlet temperature of the transmission;
the oil temperature control piece is used for controlling the oil inlet temperature of the transmission;
the oil temperature detection piece, the oil temperature control piece and the rack control module are in communication connection.
In one embodiment, the power output module includes an output motor coupled to an output of the transmission to provide the resistance to the transmission.
In one embodiment, the bench measurement module includes:
the input sensor is arranged at the input end of the transmission and is used for testing the operation signal of the input end of the transmission;
and the output sensor is arranged at the input end of the transmission and is used for testing the operation signal of the input end of the transmission.
In one embodiment, the test bench is provided with an input bearing seat and an output bearing seat, the input bearing seat is used for being connected with an input end of the transmission, and the output bearing seat is used for being connected with an output end of the transmission.
In one embodiment, the transmission testing apparatus further comprises an autopilot control module in communication with the transmission.
In one embodiment, the transmission testing device further comprises a gradient simulation module, wherein the gradient simulation module is connected with the testing bench and used for controlling the testing bench to perform gradient simulation;
the gradient simulation module is in communication connection with the rack control module.
In one embodiment, the gradient simulation module comprises a chassis and a gradient driving member, one end of the test bench is rotationally connected with the chassis, the other end of the test bench is connected with the gradient driving member between the chassis, and the gradient driving member drives the test bench to rotate so as to control the test bench to perform gradient simulation.
Embodiments of the second aspect of the present application provide a testing method, including:
mounting a transmission to the transmission testing apparatus of any one of the embodiments described above;
inputting test parameters to the rack control module;
the rack control module simulates the operation of a real vehicle working condition according to the test parameters;
the bench measurement module calculates the overall efficiency based on the ratio of the output work to the input work of the transmission under real vehicle conditions.
In one embodiment, the test parameters include road condition parameters, vehicle parameters, and oil temperature model parameters.
In one embodiment, the road condition parameters include a vehicle running speed versus time curve and a gradient versus mileage curve;
the vehicle parameters comprise vehicle weight, vehicle inertia, transmission speed ratio, running resistance coefficient and engine ignition control curve;
the oil temperature model parameters comprise a heating power formula, a heat dissipation power formula, specific heat capacity and lubricating oil mass.
In one embodiment, the transmission testing apparatus further comprises an autopilot control module communicatively coupled to the transmission; the bench control module simulates a real vehicle Kuang Yun time according to the test parameters, and comprises:
the automatic driving control module adopts a closed-loop control principle according to the road condition parameters, and inputs an accelerator signal and a brake signal to the rack control module;
the rack control module completes real vehicle model operation according to the accelerator signal and the brake signal;
and the rack control module executes an operation result according to the actual vehicle model operation.
In one embodiment, the real vehicle model operation includes a real vehicle engine model operation, a real vehicle motion model operation, and a real vehicle oil temperature model operation;
and the rack control module is used for calculating and controlling the power input module, the power output module and the oil temperature measurement and control module to execute calculation results according to the real vehicle model.
In one embodiment, the transmission testing device further includes a gradient simulation module, which is connected with the testing bench and is used for controlling the testing bench to perform gradient simulation, and the gradient simulation module is connected with the bench control module in a communication manner;
the actual vehicle model operation further comprises an actual vehicle gradient model operation and an actual vehicle communication model operation;
and the rack control module is used for controlling the gradient simulation module and the actual vehicle communication model to operate and execute operation results according to the actual vehicle model operation.
In one embodiment, the bench measurement module calculates the integrated efficiency based on a ratio of output work to input work of the transmission in real vehicle conditions, including:
the rack measuring module records the rotating speed and torque values of an input end and an output end of the transmission when a real worker Kuang Yun;
calculating the ratio of the output power to the input power of the transmission in the real vehicle working condition, wherein the output power is equal to the integral of the output power and the time, and the input power is equal to the integral of the input power and the time;
the integrated efficiency is equal to the output work integral divided by the input work.
According to the testing method, the transmission testing device can simulate the actual vehicle working condition more accurately, the comprehensive efficiency of the transmission under the actual vehicle working condition is obtained, and the accuracy of the transmission testing result is improved.
Drawings
Fig. 1 is a schematic structural diagram of a transmission testing device according to an embodiment of the present application.
FIG. 2 is a flow chart of a transmission testing method according to an embodiment of the present application.
FIG. 3 is a schematic diagram of a transmission testing apparatus in a transmission testing method according to an embodiment of the present application.
FIG. 4 is a graph illustrating road condition parameters, i.e., vehicle speed versus time, in a transmission testing method according to an embodiment of the present disclosure.
Reference numerals:
1. a test bench; 11. an input bearing seat; 12. an output bearing seat;
2. a transmission; 21. an input end; 22. an output end; 23. a control unit; 24. a communication module;
3. a power input module;
4. an oil temperature measurement and control module;
5. a power output module;
6. a gantry control module;
7. a gantry measurement module; 71. an input sensor; 72. an output sensor;
8. an autopilot control module;
9. a gradient simulation module; 91. a chassis; 92. and a gradient driving member.
Detailed Description
In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.
In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms refer to the orientation or positional relationship based on the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.
In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
In this application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a transmission testing apparatus according to an embodiment of the present application.
At least one embodiment of the present application proposes a transmission testing device, including a testing bench 1, a power input module 3, an oil temperature measurement and control module 4, a power output module 5, a bench control module 6, and a bench measurement module 7. The test bench 1 is used for bearing a transmission 2; the power input module 3 is used for being connected with an input end 21 of the transmission 2 and providing power for the transmission 2; the oil temperature measurement and control module 4 is connected with the transmission 2 and is used for controlling the oil inlet temperature of the transmission 2; the power output module 5 is used for being connected with an output end 22 of the transmission 2 and providing resistance for the transmission 2; the rack control module 6 is respectively in communication connection with the power input module 3, the oil temperature measurement and control module 4 and the power output module 5 so as to simulate the working condition of a real vehicle; the bench measurement module 7 is in communication with the transmission 2, the bench measurement module 7 testing the operating signals of the transmission 2 in real vehicle conditions.
According to the transmission testing device of the embodiment of the application, the power input module 3 provides power for the transmission 2 and is used for simulating an engine; the power output module 5 provides resistance for the transmission 2 and is used for simulating road resistance received during running of the vehicle; the oil temperature measurement and control module 4 controls the oil inlet temperature of the transmission 2, so that the transmission 2 is better close to the actual vehicle working condition during testing; the bench control module 6 controls the transmission testing device to simulate the actual vehicle working condition, and the bench measurement module 7 tests the operation signal of the transmission 2 under the actual vehicle working condition to obtain an accurate test result. The transmission testing device can simulate real vehicle working conditions more accurately, and accuracy of testing results of the transmission 2 is improved.
In some embodiments, the power input module 3 includes an input motor that is coupled to an input 21 of the transmission 2 to provide power to the transmission 2. Specifically, an input motor is mounted on the test bench 1, and an output shaft of the input motor is connected to an input end 21 of the transmission 2 to power the transmission 2. The stand control module 6 is in communication connection with the input motor to control the output torque and rotational speed of the input motor to simulate the power source of the transmission 2 during real vehicle conditions.
In some embodiments, the oil temperature measurement and control module 4 includes an oil temperature detection member for detecting an oil inlet temperature of the transmission 2; the oil temperature control member is used for controlling the oil inlet temperature of the transmission 2. Wherein the oil temperature detection member, the oil temperature control member and the rack control module 6 are in communication connection. Specifically, the oil temperature detecting member may be configured as a temperature sensor for detecting an oil intake temperature of the transmission 2; the oil temperature control member may be configured as a heater, and the heater may be configured to heat the transmission oil to change the temperature of the transmission 2 oil, that is, the oil inlet temperature, and the stand control module 6 may detect the oil inlet temperature in real time according to the temperature sensor, so as to control the heater to adjust the oil inlet temperature in real time, so as to achieve the effect that the oil temperature measurement and control module 4 controls the oil inlet temperature of the transmission 2.
In some embodiments, the power output module 5 includes an output motor that is coupled to the output 22 of the transmission 2 to provide resistance to the transmission 2. Specifically, an output motor is mounted on the test bench 1, and an output shaft of the output motor is connected to an input end 21 of the transmission 2 to provide resistance to the transmission 2. The gantry control module 6 is communicatively coupled to the output motor to control the output torque and speed of the output motor to simulate the source of drag of the transmission 2 during real vehicle conditions.
In some embodiments, the bench measurement module 7 includes an input sensor 71 and an output sensor 72, the input sensor 71 being mounted to the input 21 of the transmission 2 for testing the operating signal of the input 21 of the transmission 2; the output sensor 72 is mounted to the input 21 of the transmission 2 for testing the operating signal of the input 21 of the transmission 2.
In some embodiments, the input sensor 71 is configured as a first torque sensor mounted at the input 21 of the transmission 2 for testing the torque signal and the rotational speed signal of the input 21 of the transmission 2. The output sensor 72 is configured as a second torque sensor mounted at the output 22 of the transmission 2 for testing the torque signal and the rotational speed signal of the output 22 of the transmission 2.
In some embodiments, the test bench 1 is provided with an input bearing housing 11 for connecting to an input 21 of the transmission 2 and an output bearing housing 12 for connecting to an output 22 of the transmission 2. Specifically, the input bearing seat 11 and the output bearing seat 12 are arranged on the test bench 1 and are used for providing support and connection for the transmission 2, simulating the installation condition of the transmission 2 in a vehicle, ensuring the smooth running of the transmission 2 and improving the accuracy of test results.
In some embodiments, the transmission testing apparatus further includes an autopilot control module 8, the autopilot control module 8 being communicatively coupled to the transmission 2. The autopilot control module 8 drives the transmission 2 to simulate operation in real vehicle conditions.
In some embodiments, the transmission testing device further comprises a gradient simulation module 9, wherein the gradient simulation module 9 is connected with the test bench 1 and is used for controlling the test bench 1 to perform gradient simulation; the grade simulation module 9 is in communication with the gantry control module 6. The gradient simulation module 9 drives the test bench 1 to simulate the gradient change in the actual vehicle working condition so as to simulate the change of the gradient of the position of the transmission 2 in the test, so that the actual vehicle working condition in the test is more real, and the accuracy of the test result is improved.
In some embodiments, the gradient simulation module 9 includes a chassis 91 and a gradient driving member 92, one end of the test bench 1 is rotationally connected with the chassis 91, the gradient driving member 92 is connected between the other end and the chassis 91, and the gradient driving member 92 drives the test bench 1 to rotate, so that a surface of the test bench 1 bearing the transmission 2 is inclined to control the test bench 1 to perform gradient simulation. Specifically, the gradient driving member 92 may be configured as a hydraulic cylinder or a telescopic cylinder, and is connected to the test bench 1 and the chassis 91, so as to drive the test bench 1 to rotate relative to the chassis 91, so as to change the gradient of the surface of the test bench 1 carrying the transmission 2, and control the test bench 1 to perform gradient simulation to be closer to the actual vehicle working condition.
Referring to fig. 1 and 2, fig. 2 shows a flow chart of a transmission testing method according to an embodiment of the present application.
At least one embodiment of the present application proposes a test method comprising the steps of:
step S200, installing the transmission 2 to the transmission testing apparatus of any one of the above embodiments;
step S300, inputting test parameters to the rack control module 6;
step S400, the bench control module 6 simulates the operation of the real vehicle according to the test parameters;
in step S500, the bench measurement module 7 calculates the comprehensive efficiency based on the ratio of the output work to the input work of the transmission 2 in the actual vehicle condition.
In the testing method, the transmission testing device can simulate the actual vehicle working condition more accurately, the comprehensive efficiency of the transmission 2 under the actual vehicle working condition is obtained, and the accuracy of the testing result of the transmission 2 is improved.
In some embodiments, in step S300, the test parameters may be input to the gantry control module 6 through the host computer.
In some embodiments, in step S300, the test parameters include road condition parameters, vehicle parameters, and oil temperature model parameters.
In some embodiments, in step S300, the road condition parameters include a vehicle speed versus time, a gradient versus mileage.
In some embodiments, in step S300, the vehicle parameters include vehicle weight, vehicle inertia, transmission speed ratio, running resistance coefficient, engine ignition control curve.
In some embodiments. In step S300, the oil temperature model parameters include a heating power formula, a heat dissipation power formula, a specific heat capacity, and a lubricant quality.
Referring to fig. 2 and 3, fig. 3 is a schematic diagram of a transmission testing apparatus in a transmission testing method according to an embodiment of the present application. In some embodiments, the transmission testing apparatus further includes an autopilot control module 8, the autopilot control module 8 being communicatively coupled to the transmission 2. The stage control module 6 simulates the real vehicle Kuang Yun time according to the test parameters, and the step S400 includes the following steps:
the automatic driving control module 8 adopts a closed-loop control principle according to road condition parameters, and inputs an accelerator signal and a brake signal to the rack control module 6;
the bench control module 6 completes the calculation of the real vehicle model according to the accelerator signal and the brake signal;
the gantry control module 6 executes the operation result according to the actual vehicle model operation.
Specifically, the automatic driving control module 8 adopts a closed-loop control principle according to road condition parameters, inputs an accelerator signal and a brake signal to the rack control module 6, reduces the accelerator when the actual vehicle speed is higher than the target vehicle speed during the acceleration of the road section, and increases the accelerator otherwise; and when the road section is decelerated, increasing the braking when the actual vehicle speed is higher than the target vehicle speed, and otherwise, reducing the braking. Referring to fig. 4, fig. 4 is a graph of road condition parameters, i.e. vehicle speed versus time, in a transmission testing method according to an embodiment of the present application. According to road condition parameters, namely a relation curve of vehicle speed and time, the automatic driving control system adopts a PID closed-loop control principle to input throttle signals and brake signals of the bench operation to the bench control module 6, so that the simulated vehicle transmission 2 operates in a vehicle speed range corresponding to a specified working condition.
In some embodiments, the real vehicle model operation includes a real vehicle engine model operation, a real vehicle motion model operation, a real vehicle oil temperature model operation; the rack control module 6 calculates and controls the power input module 3, the power output module 5 and the oil temperature measurement and control module 4 to execute the calculation result according to the real vehicle model.
Specifically, the power input module 3 controls the output torque of the input motor in real time based on the calculation result of the real vehicle engine model in the rack control module 6, and the real vehicle engine model, namely an engine Map, also called a universal characteristic diagram, outputs corresponding torque according to the accelerator signal and the motor rotation speed.
Specifically, the power output module 5 controls the output operation of the output motor in real time based on the calculation result of the real-vehicle motion model of the gantry control module 6. The real vehicle motion model calculates the running resistance according to the input running resistance coefficient, the vehicle weight, the road gradient, the brake signal and other information, multiplies the transmission speed ratio by the output torque of the engine, subtracts the running resistance, divides the whole vehicle inertia to obtain the vehicle acceleration, and calculates the real-time speed at the current moment based on the acceleration and the initial speed.
Specifically, the formula of the real vehicle oil temperature model is: (heating power P) heat Calibrated heat dissipation power P cool ) Specific heat capacity C oil Mass M oil ；
The calibrated heat dissipation power is calibrated based on the current oil temperature and the ambient temperature difference, and the heating power is obtained by subtracting the average output power from the average input power in the current period of time.
In some embodiments, the transmission testing device further comprises a gradient simulation module 9, wherein the gradient simulation module 9 is connected with the test bench 1 and is used for controlling the test bench 1 to perform gradient simulation, and the gradient simulation module 9 is connected with the bench control module 6 in a communication manner; the actual vehicle model operation also comprises an actual vehicle gradient model operation and an actual vehicle communication model operation; the rack control module 6 controls the gradient simulation module 9 according to the actual vehicle model operation and the actual vehicle communication model operation execution operation result.
Specifically, the stage control module 6 controls the gradient simulation module 9 to drive the test stage 1 to turn to a corresponding angle according to the actual vehicle model operation. The transmission testing device further comprises a communication module 24, which communication module 24 sends various types of message signals required by the control unit 23 of the transmission 2. The real vehicle gradient model operation result tests the adjustment overturning angle of the test bench 1 in real time, so that the test bench 1 is positioned at a corresponding gradient. The real vehicle gradient model comprises the relationship between gradient and mileage in the input road condition.
In some embodiments, in step S500, when the bench measurement module 7 calculates the integrated efficiency based on the ratio of the output work to the input work of the transmission 2 in the actual vehicle condition, the method includes the following steps:
the rack measuring module 7 records the rotating speed and torque values of the input end 21 and the output end 22 of the transmission 2 when an actual worker Kuang Yun;
calculating the output work W of the transmission 2 in the actual vehicle working condition out And input work W in Is a ratio of the output work W out Equal to the output power P out Integrating with time, input work W in Equal to the input power P in Integration with time;
the integrated efficiency Eff is equal to the output work W out Divided by input work W in 。
Wherein the work W is input in Is the torque T recorded by the input sensor 71 in And a rotational speed n in Is divided by 9550; output work W out Is the torque T recorded by the output sensor 72 out And a rotational speed n out Is divided by 9550.
The transmission testing method based on the actual vehicle working condition is a transmission comprehensive efficiency testing method based on the actual vehicle working condition, can be applied to an automatic transmission, namely an AMT (Automated Mechanical Transmission automatic transmission), and can simulate the actual vehicle working condition more accurately by the transmission testing device to obtain the comprehensive efficiency of the transmission 2 under the more accurate actual vehicle working condition, so that the accuracy of the transmission 2 testing result is improved, and the transmission comprehensive efficiency testing method is used for verification and analysis of transmission efficiency design targets.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (16)
1. A transmission testing apparatus, comprising:
the test bench is used for bearing the speed changer;
the power input module is used for being connected with the input end of the transmission and providing power for the transmission;
the oil temperature measurement and control module is connected with the speed changer and used for controlling the oil inlet temperature of the speed changer;
the power output module is used for being connected with the output end of the transmission and providing resistance for the transmission;
the rack control module is respectively in communication connection with the power input module, the oil temperature measurement and control module and the power output module so as to simulate the working condition of a real vehicle;
the rack measurement module is in communication connection with the transmission, and the rack measurement module tests operation signals of the transmission under the actual vehicle condition.
2. The transmission testing device of claim 1, wherein the power input module comprises an input motor coupled to an input of the transmission for providing the power to the transmission.
3. The transmission testing device of claim 1, wherein the oil temperature measurement and control module comprises:
the oil temperature detection piece is used for detecting the oil inlet temperature of the transmission;
the oil temperature control piece is used for controlling the oil inlet temperature of the transmission;
the oil temperature detection piece, the oil temperature control piece and the rack control module are in communication connection.
4. The transmission testing device of claim 1, wherein the power output module includes an output motor coupled to an output of the transmission to provide the resistance to the transmission.
5. The transmission testing device of claim 1, wherein the bench measurement module comprises:
the input sensor is arranged at the input end of the transmission and is used for testing the operation signal of the input end of the transmission;
and the output sensor is arranged at the input end of the transmission and is used for testing the operation signal of the input end of the transmission.
6. The transmission testing device of claim 1, wherein the test bench is provided with an input bearing housing for connecting to an input of the transmission and an output bearing housing for connecting to an output of the transmission.
7. The transmission testing device of claim 1, further comprising an autopilot control module communicatively coupled to the transmission.
8. The transmission testing device of claim 1, further comprising a grade simulation module coupled to the test bench for controlling the test bench to perform grade simulation;
the gradient simulation module is in communication connection with the rack control module.
9. The transmission testing device of claim 8, wherein the grade simulation module comprises a chassis and a grade driving member, one end of the test bench is rotatably connected with the chassis, the other end of the test bench is connected with the chassis, and the grade driving member drives the test bench to rotate so as to control the test bench to perform grade simulation.
10. A method of testing, comprising:
mounting a transmission to the transmission testing apparatus of any one of claims 1-9;
inputting test parameters to the rack control module;
the rack control module simulates the operation of a real vehicle working condition according to the test parameters;
the bench measurement module calculates the overall efficiency based on the ratio of the output work to the input work of the transmission under real vehicle conditions.
11. The method of claim 10, wherein the test parameters include road condition parameters, vehicle parameters, and oil temperature model parameters.
12. The method according to claim 11, wherein the road condition parameters include a vehicle speed versus time, a grade versus mileage;
the vehicle parameters comprise vehicle weight, vehicle inertia, transmission speed ratio, running resistance coefficient and engine ignition control curve;
the oil temperature model parameters comprise a heating power formula, a heat dissipation power formula, specific heat capacity and lubricating oil mass.
13. The method of testing according to claim 11, wherein the transmission testing device further comprises an autopilot control module communicatively coupled to the transmission; the bench control module simulates a real vehicle Kuang Yun time according to the test parameters, and comprises:
the automatic driving control module adopts a closed-loop control principle according to the road condition parameters, and inputs an accelerator signal and a brake signal to the rack control module;
the rack control module completes real vehicle model operation according to the accelerator signal and the brake signal;
and the rack control module executes an operation result according to the actual vehicle model operation.
14. The test method of claim 13, wherein the real vehicle model calculation includes a real vehicle engine model calculation, a real vehicle motion model calculation, a real vehicle oil temperature model calculation;
and the rack control module is used for calculating and controlling the power input module, the power output module and the oil temperature measurement and control module to execute calculation results according to the real vehicle model.
15. The method of claim 13, wherein the transmission testing device further comprises a grade simulation module coupled to the test bench for controlling the test bench to perform grade simulation, the grade simulation module being communicatively coupled to the bench control module;
the actual vehicle model operation further comprises an actual vehicle gradient model operation and an actual vehicle communication model operation;
and the rack control module is used for controlling the gradient simulation module and the actual vehicle communication model to operate and execute operation results according to the actual vehicle model operation.
16. The method of claim 10, wherein the bench measurement module calculates the integrated efficiency based on a ratio of output work to input work of the transmission in real vehicle conditions, comprising:
the rack measuring module records the rotating speed and torque values of an input end and an output end of the transmission when a real worker Kuang Yun;
calculating the ratio of the output power to the input power of the transmission in the real vehicle working condition, wherein the output power is equal to the integral of the output power and the time, and the input power is equal to the integral of the input power and the time;
the integrated efficiency is equal to the output work integral divided by the input work.
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