CN113218551A - Torque testing device, gearbox efficiency testing system and gearbox efficiency testing method - Google Patents
Torque testing device, gearbox efficiency testing system and gearbox efficiency testing method Download PDFInfo
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- CN113218551A CN113218551A CN202110493916.5A CN202110493916A CN113218551A CN 113218551 A CN113218551 A CN 113218551A CN 202110493916 A CN202110493916 A CN 202110493916A CN 113218551 A CN113218551 A CN 113218551A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/26—Devices for measuring efficiency, i.e. the ratio of power output to power input
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
- G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
- G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
- G01L3/105—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means involving inductive means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
- G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
- G01L3/109—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving measuring phase difference of two signals or pulse trains
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/24—Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity
- G01L3/242—Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity by measuring and simultaneously multiplying torque and velocity
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- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Electromagnetism (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a torque testing device, a testing system and a testing method of gearbox efficiency, the torque testing device comprises a shell, a connecting component and a torque testing component, the shell extends along the left and right direction, two ends of the shell are respectively used for connecting with an engine shell and a gearbox shell, a mounting cavity is arranged in the shell along the left and right direction, the connecting component is arranged in the mounting cavity and comprises a connecting shaft which extends along the left and right direction and is rotatably mounted in the mounting cavity, one end of the connecting shaft is used for being in driving connection with an engine flywheel, the other end of the connecting shaft is used for being in driving connection with a gearbox input shaft, the torque testing component comprises a torque sensor arranged between the inner wall surface of the mounting cavity and the connecting shaft, the torque input into the gearbox by the engine can be accurately obtained in real time through the torque sensor, so that the torque input into the gearbox under a specific working condition is provided in the calculation of the gearbox efficiency, thereby making the calculation of the gearbox efficiency more accurate.
Description
Technical Field
The invention relates to the technical field of testing of gearbox efficiency, in particular to a torque testing device, a gearbox efficiency testing system and a gearbox efficiency testing method.
Background
The engine and the gearbox are connected into a whole by the power assembly rack, the output end of the gearbox is connected with the motor through the half shaft, the actual operation working condition of the whole vehicle CAN be simulated, the torque input to the gearbox by the engine cannot be accurately obtained, the existing power assembly of the gearbox efficiency CAN be calculated only through the torque data collected by the CAN bus, and the torque precision cannot be guaranteed.
Disclosure of Invention
The invention mainly aims to provide a torque testing device, a gearbox efficiency testing system and a gearbox efficiency testing method, aiming at accurately obtaining the torque input to a gearbox by an engine.
In order to achieve the above object, the present invention provides a torque testing device for being provided between an engine and a transmission, the torque testing device including:
the shell extends in the left-right direction, two ends of the shell are respectively used for being connected with the engine shell and the gearbox shell, and an installation cavity penetrates through the interior of the shell in the left-right direction;
the connecting assembly is arranged in the mounting cavity and comprises a connecting shaft which extends in the left-right direction and is rotatably mounted in the mounting cavity, one end of the connecting shaft is used for being in driving connection with an engine flywheel, and the other end of the connecting shaft is used for being in driving connection with an input shaft of a gearbox; and the number of the first and second groups,
and the torque testing assembly comprises a torque sensor arranged between the inner wall surface of the mounting cavity and the connecting shaft.
Optionally, a support plate is arranged on the inner wall surface of the installation cavity, and the support plate extends up and down;
the torque sensor comprises a torque sensor rotor and a torque sensor stator which are matched, the torque sensor stator is arranged on the supporting plate, and the torque sensor rotor is arranged on the connecting shaft.
Optionally, the supporting plate is provided with a through hole along the left-right direction;
one end of the connecting shaft is used for being connected with the engine flywheel, and the other end of the connecting shaft penetrates through the through hole and is used for being connected with the input shaft of the gearbox;
the torque testing assembly is arranged between the inner wall surface of the through hole and the outer wall surface of the connecting shaft.
Optionally, a through hole is formed in the housing, and the through hole is communicated with the installation cavity and used for leading out a power line and a signal line; and/or the presence of a gas in the gas,
the shell is provided with an observation hole, the observation hole is communicated with the installation cavity, and the observation hole cover is provided with a transparent cover plate.
Optionally, one end of the connecting shaft is connected with the engine flywheel through a flange plate; and/or the presence of a gas in the gas,
the other end of the connecting shaft is connected with an input shaft of the gearbox through a spline.
In order to achieve the above object, the present invention provides a testing system for testing efficiency of a transmission, including a torque testing device as described above, the torque testing device including:
the shell extends in the left-right direction, two ends of the shell are respectively used for being connected with the engine shell and the gearbox shell, and an installation cavity penetrates through the interior of the shell in the left-right direction;
the connecting assembly is arranged in the mounting cavity and comprises a connecting shaft which extends in the left-right direction and is rotatably mounted in the mounting cavity, one end of the connecting shaft is used for being in driving connection with an engine flywheel, and the other end of the connecting shaft is used for being in driving connection with an input shaft of a gearbox; and the number of the first and second groups,
and the torque testing assembly comprises a torque sensor arranged between the inner wall surface of the mounting cavity and the connecting shaft.
Optionally, the testing system for gearbox efficiency further comprises:
a rack;
an engine mounted at one end of the stand;
the gearbox is arranged at the other end of the rack;
the load motors are respectively arranged on two sides of the gearbox and are arranged on the rack, and the load motors are in driving connection with the gearbox through half shafts;
the signal acquisition module is electrically connected with the load motor and the torque testing device; and the number of the first and second groups,
and the controller module is electrically connected with the engine, the gearbox, the load motor, the torque testing device and the signal collecting module.
In order to achieve the above object, the present invention provides a method for testing gearbox efficiency of a gearbox efficiency testing system based on the above mentioned gearbox efficiency, wherein the number of gear positions which are in driving connection with the gearbox by the torque testing device is multiple, and the gearbox is in one of the gear positions;
the testing method of the gearbox efficiency comprises the following steps:
acquiring a first input torque parameter of the torque testing device and a first output torque parameter of the load motor at the same moment;
a first instantaneous transmission efficiency is calculated based on the first input torque parameter and the first output torque parameter.
Optionally, shifting the gearbox in other gears;
after the step of calculating a first instantaneous transmission efficiency according to the first input torque parameter and the first output torque parameter, the step further comprises the following steps:
acquiring a plurality of second input torque parameters of the torque testing device and a plurality of second output torque parameters of the load motor at the same moment;
calculating a plurality of second instantaneous transmission efficiencies based on the plurality of second input torque parameters and the plurality of second output torque parameters, respectively.
Optionally, after the step of calculating a plurality of second instantaneous transmission efficiencies based on the plurality of second input torque parameters and the plurality of second output torque parameters, respectively, the method further comprises the steps of:
processing the first instantaneous transmission efficiency and the plurality of second instantaneous transmission efficiencies to obtain a transmission overall efficiency.
In the technical scheme provided by the invention, two ends of the shell are respectively connected with the engine shell and the gearbox shell, the inside of the shell is provided with a mounting cavity along the left-right direction, the connecting component comprises a connecting shaft which is arranged along the left-right direction in an extending way and is rotatably mounted in the mounting cavity, because one end of the connecting shaft is in driving connection with the engine flywheel and the other end of the connecting shaft is in driving connection with the input shaft of the gearbox, the torque testing assembly comprises a torque sensor arranged between the inner wall surface of the mounting cavity and the connecting shaft, the torque input by the engine to the gearbox can be accurately obtained in real time through the torque sensor, the torque input by the engine to the gearbox under specific working conditions is provided in the calculation of the gearbox efficiency, so that the calculation of the gearbox efficiency is more accurate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of one embodiment of a transmission efficiency testing system provided by the present invention;
FIG. 2 is a schematic diagram of one embodiment of the torque testing apparatus of FIG. 1;
FIG. 3 is a cross-sectional view of the torque testing device of FIG. 2;
FIG. 4 is a schematic diagram of a controller module of a hardware operating environment according to the embodiment of FIG. 1;
FIG. 5 is a schematic flow chart illustrating an embodiment of a method for testing transmission efficiency of the transmission efficiency testing system according to the present invention;
fig. 6 is a schematic flow chart of fig. 5 after step 20.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | Testing system for |
101 | Shell body |
| 200 | |
1011 | Through hole |
| 201 | |
1012 | |
| 202 | |
102 | Connecting shaft |
| 300 | |
103 | Supporting plate |
| 301 | |
1041 | Torque |
| 302 | Input shaft of |
1042 | |
| 400 | |
105 | |
| 10 | Torque testing device | a | Mounting cavity |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The engine and the gearbox are connected into a whole by the power assembly rack, the output end of the gearbox is connected with the motor through the half shaft, the actual operation working condition of the whole vehicle CAN be simulated, the torque input to the gearbox by the engine cannot be accurately obtained, the existing power assembly of the gearbox efficiency CAN be calculated only through the torque data collected by the CAN bus, and the torque precision cannot be guaranteed.
Fig. 1 to 3 are schematic diagrams illustrating an embodiment of a system and a method for testing efficiency of a transmission according to the present invention.
Referring to fig. 1-3, the present invention also provides a transmission efficiency testing system 100, comprising a torque testing device 10, the torque testing device 10 comprises a shell 101, a connecting component and a torque testing component, wherein the shell 101 extends along the left-right direction, the two ends of the housing 101 are respectively used for connecting with the engine shell 201 and the gearbox shell 301, the inside of the shell 101 is provided with an installation cavity a along the left-right direction, the connecting component is arranged in the installation cavity a and comprises a connecting shaft 102 which is arranged along the left-right direction in an extending way and is rotatably installed in the installation cavity a, one end of the connecting shaft 102 is used for being in driving connection with the engine flywheel 202, the other end of the connecting shaft 102 is used for being in driving connection with the gearbox input shaft 302, the torque testing assembly comprises a torque sensor arranged between the inner wall surface of the mounting cavity a and the connecting shaft 102.
In the technical scheme provided by the invention, two ends of the shell 101 are respectively connected with the engine shell 201 and the gearbox shell 301, an installation cavity a is arranged in the shell 101 along the left-right direction, the connecting assembly comprises a connecting shaft 102 which is arranged in the left-right direction in an extending manner and is rotatably installed in the installation cavity a, because one end of the connecting shaft 102 is in driving connection with an engine flywheel 202, the other end of the connecting shaft 102 is in driving connection with a gearbox input shaft 302, the torque testing assembly comprises a torque sensor which is arranged between the inner wall surface of the installation cavity a and the connecting shaft 102, the torque input into the gearbox by the engine can be accurately obtained in real time through the torque sensor, so that the torque input into the gearbox by the engine under a specific working condition is provided in the calculation of the gearbox efficiency, thereby making the calculation of the gearbox efficiency more accurate.
In order to mount the torque sensor, referring to fig. 2 and 3, a support plate 103 is disposed on an inner wall surface of the mounting cavity a, the support plate 103 extends vertically, the torque sensor includes a torque sensor rotor 1041 and a torque sensor stator 1042 which are matched with each other, the torque sensor stator 1042 is disposed on the support plate 103, the torque sensor rotor 1041 is disposed on the connecting shaft 102, in this way, by disposing the support plate 103 in the mounting cavity a, disposing the torque sensor stator 1042 on the support plate 103, disposing the torque sensor rotor 1041 on the connecting shaft 102, when the torque sensor rotor 1041 rotates along with the connecting shaft 102, an electrical signal indicating a phase difference between two ends of the torque sensor rotor 1041 is obtained between the torque sensor rotor 1041 and the torque sensor stator 1042 based on an electromagnetic induction principle, and then obtain the moment of torsion of engine output transmission, so set up, simple structure can accurately obtain the moment of torsion that the engine input was to the gearbox.
Specifically, a through hole penetrates through the support plate 103 in the left-right direction, one end of the connecting shaft 102 is used for being connected with the engine flywheel 202, the other end of the connecting shaft 102 penetrates through the through hole and is used for being connected with the transmission input shaft 302, and the torque testing component is arranged between the inner wall surface of the through hole and the outer wall surface of the connecting shaft 102.
Considering that the torque testing device 10 needs to be connected with a power supply, referring to fig. 2, a through hole 1011 is formed in the housing 101, the through hole 1011 is communicated with the installation cavity a, and a power line and a signal line are led out through the through hole 1011, so as to supply power to the torque testing component and facilitate output of signals.
In order to observe the internal situation of the casing 101 in real time, the casing 101 is provided with an observation hole 1012, the observation hole 1012 is communicated with the installation cavity a, and the observation hole 1012 is covered with a transparent cover plate, so that the internal situation of the casing 101 can be observed through the observation hole 1012, and dust and the like are prevented from entering and influencing the work of the torque testing device 10.
Referring to fig. 1 to 3, one end of the connecting shaft 102 is connected to the engine flywheel 202 through the flange 105, so that the connecting shaft 102 and the engine flywheel 202 can be conveniently detached, and the connecting shaft is simple in structure and firm in connection.
Further, the other end of the connecting shaft 102 is connected with the transmission input shaft 302 through a spline, so that the other end of the connecting shaft 102 is connected with the transmission input shaft 302, and the connecting shaft and the transmission input shaft 302 rotate synchronously and are simple in structure.
Further, the testing system 100 for gearbox efficiency further includes a rack, an engine 200, a gearbox 300, a load motor 400, a signal collection module and a controller module, wherein the engine 200 is installed at one end of the rack, the gearbox 300 is installed at the other end of the rack, the load motor 400 is respectively arranged at two sides of the gearbox 300, the load motor 400 and the gearbox 300 which are installed on the rack are in driving connection through a half shaft, the signal collection module is electrically connected with the load motor 400 and the torque testing device 10, and the controller module is electrically connected with the engine 200, the gearbox 300, the load motor 400, the torque testing device 10 and the signal collection module, so that the signal collection module is electrically connected with the load motor 400 and the torque testing device 10, the signals corresponding to the load motor 400 and the torque testing device 10 can be respectively acquired, and the controller module respectively controls the engine 200, the gearbox 300, the load motor 400, the torque testing device 10 and the signal collecting module to work according to the corresponding signals, so that the automation of the gearbox efficiency testing system 100 is realized.
Because the torque and the rotating speed need to be obtained when the efficiency is calculated, the power is obtained according to the product of the torque and the rotating speed, and the efficiency can be obtained by dividing the output power by the input power, which is not repeated herein. The signals corresponding to the load motor 400 and the torque testing device 10 respectively refer to a first input rotating speed and a first input torque of the load motor, a second rotating speed and a second torque output by the engine, and the first input rotating speed, the first input torque, the second rotating speed and the second torque are collected and recorded by a signal collection module, so that preparation is made for testing the efficiency of a subsequent gearbox.
It should be noted that the controller module includes a memory, a processor and a test program of the transmission efficiency test system 100 stored in the memory and operable on the processor, and the controller module controls the engine 200, the transmission 300, the load motor 400, the torque test device 10 and the signal collection module to operate through the test program of the transmission efficiency test system 100, so as to accurately obtain the torque input from the engine 200 to the transmission 300, and further accurately calculate the transmission efficiency.
The controller module may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
In the controller module shown in fig. 4, the test system 100 test program for transmission efficiency stored in the memory 1005 is invoked by the processor 1001 and performs the following operations:
the number of gears which are in driving connection with the torque testing device 10 is multiple, and the gearbox 300 is in one gear;
the testing method of the gearbox efficiency comprises the following steps:
acquiring a first input torque parameter of the torque testing device 10 and a first output torque parameter of the load motor 400 at the same time;
a first instantaneous transmission efficiency is calculated based on the first input torque parameter and the first output torque parameter.
Invoking, by the processor 1001, a transmission efficiency testing system 100 test program stored in the memory 1005, and performing the following:
shifting the gearbox 300 into other gears;
after the step of calculating a first instantaneous transmission efficiency according to the first input torque parameter and the first output torque parameter, the step further comprises the following steps:
acquiring a plurality of second input torque parameters of the torque testing device 10 and a plurality of second output torque parameters of the load motor 400 at the same time;
calculating a plurality of second instantaneous transmission efficiencies based on the plurality of second input torque parameters and the plurality of second output torque parameters, respectively.
Invoking, by the processor 1001, a transmission efficiency testing system 100 test program stored in the memory 1005, and performing the following:
after the step of calculating a plurality of second instantaneous transmission efficiencies based on the plurality of second input torque parameters and the plurality of second output torque parameters, respectively, the method further comprises the steps of:
processing said first instantaneous transmission efficiency and said plurality of second instantaneous transmission efficiencies to obtain a transmission 300 overall efficiency.
Based on the above hardware structure, the present invention provides a method for testing the transmission efficiency of the transmission efficiency testing system 100 based on the above, in the technical scheme of the present invention, the first input torque parameter is the torque output by the engine 200 detected by the torque testing device 10, that is, the input torque of the transmission 300, so that the first input torque parameter corresponding to the actual working condition is provided when calculating the transmission efficiency according to the actual working condition by accurately measuring the first input torque parameter output by the engine 200 and according to the first input torque parameter and the first output torque parameter, the calculated first instantaneous transmission efficiency is more accurate, and it is avoided that the actual working condition is not considered when the actual vehicle is working, the torque of the input end of the transmission 300 is acquired through the CAN bus, resulting in the problem of inaccurate torque measurements.
Specifically, referring to fig. 5, the number of gears in driving connection with the transmission 300 is multiple, the transmission 300 is in one of the gears, and the torque testing device 10 configured by the testing program of the transmission efficiency testing system 100 comprises the following steps:
step S10, obtaining a first input torque parameter of the torque testing device 10 and a first output torque parameter of the load motor 400 at the same time;
specifically, in this step, the torque testing device 10 detects the torque output by the engine 200, so that the torque testing device 10 obtains the first input torque parameter corresponding to the torque output by the engine 200, that is, the input torque of the transmission 300, and prepares for subsequent calculation of the transmission efficiency by obtaining the first input torque parameter of the torque testing device 10 and the first output torque parameter of the load motor 400 at the same time.
Step S20 is a step of calculating a first instantaneous transmission efficiency from the first input torque parameter and the first output torque parameter.
Specifically, in this step, the first input torque parameter is a torque output by the engine 200 detected by the torque testing device 10, that is, an input torque of the transmission 300, a first instantaneous transmission efficiency is calculated according to the first input torque parameter and the first output torque parameter, the first input torque parameter output by the engine 200 is accurately measured, and according to the first input torque parameter and the first output torque parameter, the actual working condition is considered, so that the calculated first instantaneous transmission efficiency is more accurate, and the problem that the torque measurement is inaccurate due to the fact that the actual working condition is not considered when the actual vehicle running state is operated, and the torque at the input end of the transmission 300 is acquired through the CAN bus, is avoided.
In the technical scheme of the present invention, the first input torque parameter is the torque output by the engine 200 detected by the torque testing device 10, that is, the input torque of the transmission 300, so that the first input torque parameter corresponding to the actual working condition is provided when calculating the efficiency of the transmission according to the actual working condition, the calculated first instantaneous transmission efficiency is more accurate by accurately measuring the first input torque parameter output by the engine 200, and the problem that the torque measurement is inaccurate due to the fact that the actual working condition is not considered when the input torque of the transmission 300 is acquired through the CAN bus to obtain data when the transmission operates in the actual vehicle running state is avoided.
Further, referring to fig. 6, the gearbox 300 is shifted in other gears; after the step S20 calculating the first instantaneous transmission efficiency according to the first input torque parameter and the first output torque parameter, the method further includes the steps of:
step S30, obtaining a plurality of second input torque parameters of the torque testing device 10 and a plurality of second output torque parameters of the load motor 400 at the same time;
and step S40, calculating a plurality of second instantaneous gearbox efficiencies according to the plurality of second input torque parameters and the plurality of second output torque parameters respectively.
Considering that the running state of the whole vehicle needs to be switched to other gears as required, then at the same moment, the plurality of second input torque parameters of the torque testing device 10 and the plurality of second output torque parameters of the load motor 400 are obtained, and a plurality of second instantaneous gearbox efficiencies are calculated according to the plurality of second input torque parameters and the plurality of second output torque parameters respectively, and the points with lower efficiency in the actual driving process of the whole vehicle can be identified by utilizing the plurality of second instantaneous gearbox efficiencies, so that the direction is provided for improving the efficiency and optimizing the power economy of the whole vehicle.
It should be noted that, when the actual vehicle runs, the vehicle is subjected to resistance, in the embodiment of the present application, the resistance when the entire vehicle runs is loaded on the load motor 400 as needed, and the operation of the engine 200 and the transmission 300 is controlled by the controller module, so that the actual running state of the entire vehicle can be simulated. For example, the WLTC test conditions of the entire vehicle operation may be simulated, and the instantaneous transmission efficiency of the transmission 300 may be obtained for the entire conditions.
Further, after the step of calculating a plurality of second instantaneous transmission efficiencies according to the plurality of second input torque parameters and the plurality of second output torque parameters, respectively, in step S40, the method further includes the steps of:
and step S50, processing the first instantaneous gearbox efficiency and the plurality of second instantaneous gearbox efficiencies to obtain the comprehensive efficiency of the gearbox 300.
In the embodiment of the application, the first instantaneous gearbox efficiency and the plurality of second instantaneous gearbox efficiencies are processed to obtain the comprehensive efficiency of the gearbox 300, so that the direction for providing the power economy of the whole vehicle can be optimized.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A torque testing device for placement between an engine and a transmission, the torque testing device comprising:
the shell extends in the left-right direction, two ends of the shell are respectively used for being connected with the engine shell and the gearbox shell, and an installation cavity penetrates through the interior of the shell in the left-right direction;
the connecting assembly is arranged in the mounting cavity and comprises a connecting shaft which extends in the left-right direction and is rotatably mounted in the mounting cavity, one end of the connecting shaft is used for being in driving connection with an engine flywheel, and the other end of the connecting shaft is used for being in driving connection with an input shaft of a gearbox; and the number of the first and second groups,
and the torque testing assembly comprises a torque sensor arranged between the inner wall surface of the mounting cavity and the connecting shaft.
2. The torque testing device according to claim 1, wherein a support plate is arranged on the inner wall surface of the mounting cavity, and the support plate extends in the up-down direction;
the torque sensor comprises a torque sensor rotor and a torque sensor stator which are matched, the torque sensor stator is arranged on the supporting plate, and the torque sensor rotor is arranged on the connecting shaft.
3. The torque testing device according to claim 2, wherein the support plate is provided with through holes extending in the left-right direction;
one end of the connecting shaft is used for being connected with the engine flywheel, and the other end of the connecting shaft penetrates through the through hole and is used for being connected with the input shaft of the gearbox;
the torque testing assembly is arranged between the inner wall surface of the through hole and the outer wall surface of the connecting shaft.
4. The torque testing device according to claim 2, wherein a through hole is formed in the housing, and the through hole is communicated with the mounting cavity and used for leading out a power line and a signal line; and/or the presence of a gas in the gas,
the shell is provided with an observation hole, the observation hole is communicated with the installation cavity, and the observation hole cover is provided with a transparent cover plate.
5. The torque testing device of claim 2, wherein one end of the connecting shaft is adapted to be connected to the engine flywheel via a flange; and/or the presence of a gas in the gas,
the other end of the connecting shaft is connected with an input shaft of the gearbox through a spline.
6. A gearbox efficiency testing system comprising a torque testing device according to any one of claims 1 to 5.
7. The gearbox efficiency testing system of claim 6, further comprising:
a rack;
an engine mounted at one end of the stand;
the gearbox is arranged at the other end of the rack;
the load motors are respectively arranged on two sides of the gearbox and are arranged on the rack, and the load motors are in driving connection with the gearbox through half shafts;
the signal acquisition module is electrically connected with the load motor and the torque testing device; and the number of the first and second groups,
and the controller module is electrically connected with the engine, the gearbox, the load motor, the torque testing device and the signal collecting module.
8. A method for testing the efficiency of a gearbox based on the gearbox efficiency testing system of claim 7, characterized in that the number of gears in driving connection with the torque testing device is multiple, and the gearbox is in one of the gears;
the testing method of the gearbox efficiency comprises the following steps:
acquiring a first input torque parameter of the torque testing device and a first output torque parameter of the load motor at the same moment;
a first instantaneous transmission efficiency is calculated based on the first input torque parameter and the first output torque parameter.
9. The method for testing the efficiency of a gearbox according to claim 8, characterised in that the gearbox is shifted in other gears;
after the step of calculating a first instantaneous transmission efficiency according to the first input torque parameter and the first output torque parameter, the step further comprises the following steps:
acquiring a plurality of second input torque parameters of the torque testing device and a plurality of second output torque parameters of the load motor at the same moment;
calculating a plurality of second instantaneous transmission efficiencies based on the plurality of second input torque parameters and the plurality of second output torque parameters, respectively.
10. The method of testing transmission efficiency according to claim 9 wherein, following said step of calculating a second plurality of instantaneous transmission efficiencies based on said second plurality of input torque parameters and said second plurality of output torque parameters, respectively, the step of:
processing the first instantaneous transmission efficiency and the plurality of second instantaneous transmission efficiencies to obtain a transmission overall efficiency.
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