CN110160803B - Performance test method, equipment, storage medium and device of automobile clutch - Google Patents
Performance test method, equipment, storage medium and device of automobile clutch Download PDFInfo
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- CN110160803B CN110160803B CN201910437162.4A CN201910437162A CN110160803B CN 110160803 B CN110160803 B CN 110160803B CN 201910437162 A CN201910437162 A CN 201910437162A CN 110160803 B CN110160803 B CN 110160803B
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Abstract
The invention discloses a method, equipment, a storage medium and a device for testing the performance of an automobile clutch, wherein the method comprises the following steps: the method comprises the steps of testing a clutch of a test automobile fixed on a hub rack, collecting a hub force signal of the hub force rack and a linear displacement signal of a pedal of the clutch of the test automobile in a testing process, determining wheel driving force of the test automobile based on the hub force signal, determining pedal displacement of the clutch of the test automobile based on the linear displacement signal, and evaluating the performance of the clutch of the test automobile according to the wheel driving force and the pedal displacement. In the invention, the performance of the assembled clutch is tested based on the hub rotating rack, so that the difference between the rack installation state of a single part and the assembly state of the whole vehicle is avoided, and the test method is simple and has strong operability.
Description
Technical Field
The invention relates to the technical field of automobile performance testing, in particular to a method, equipment, a storage medium and a device for testing the performance of an automobile clutch.
Background
The automobile clutch is used as an important part of a power system of a vehicle, the performance of the automobile clutch directly influences the power transmission effect of the vehicle, influences the power performance of the whole vehicle and particularly has a vehicle starting working condition with a requirement on power transmission in the clutch combining process. At the present stage, the traffic flow of urban roads is large, traffic jam is serious, and the requirement on the starting performance of a vehicle is high, so that the clutch is used as a key control component in the starting process, the performance transmission effect in the clutch combining process needs to be accurately tested, and the starting performance and the driving feeling of the vehicle are improved.
The national automobile industry standard stipulates a dry friction type clutch performance test standard, clutch manufacturers and automobile manufacturers in the industry also establish a clutch bench test enterprise standard according to the standard, a test bench comprises a driving motor and a control system, a clutch separation and combination control motor, a force sensor, a rotating speed sensor, a temperature sensor and the like, and the test bench can simulate test conditions such as rotating speeds, driving torque values and the like corresponding to different working conditions when an automobile runs on a road and carry out clutch power transmission and durability tests.
The current clutch performance bench test method comprises the following steps:
the driving motor is controlled by the controller to output a target rotating speed and a driving torque, main transmission parameters of the clutch are monitored by using the rotating speed sensor, the torque sensor and the temperature sensor, and the power transmission performance of the clutch is analyzed according to the comparison of the front and rear power parameters of the clutch.
The current bench test method for clutch performance has the following problems:
the current test method belongs to the test property of a part rack, the test rack cannot perform performance test of the clutch assembled on the whole vehicle, and meanwhile, the test rack has a larger difference with the working environment of the clutch assembled, and the test result cannot reflect the performance of the assembled whole vehicle;
secondly, the bench test cannot simulate the power transmission performance of the clutch semi-linkage state in the vehicle starting process, and the bench cannot accurately simulate the resistance value and the variation trend in the vehicle starting process;
the test efficiency of the clutch rack is low, the assembling effect of the clutch on the rack directly influences the test result, the assembling process is complex, and the time is long.
Disclosure of Invention
The invention mainly aims to provide a method, equipment, a storage medium and a device for testing the performance of an automobile clutch, and aims to solve the technical problems that the existing clutch performance bench test method cannot test the clutching performance assembled after the whole automobile, the test consumes long time and the test efficiency is low.
In order to achieve the above object, the present invention provides a method for testing the performance of an automobile clutch, comprising the steps of:
testing a clutch of a test automobile fixed on the rotary hub rack;
collecting a hub force signal of the hub force stand and a linear displacement signal of a pedal of a clutch of the test automobile in a test process;
determining a wheel drive force of the test vehicle based on the hub force signal and a pedal displacement of a clutch of the test vehicle based on the linear displacement signal;
and evaluating the performance of the clutch of the test automobile according to the wheel driving force and the pedal displacement.
Preferably, the evaluating the performance of the clutch of the test automobile according to the wheel driving force and the pedal displacement specifically includes:
acquiring the gravity of the test automobile, and acquiring the actual climbing gradient of the test automobile through the wheel driving force and the gravity of the test automobile;
and evaluating the performance of the clutch of the test automobile according to the actual climbing gradient and the pedal displacement.
Preferably, acquire the gravity of test car, through the wheel drive power and the gravity of test car obtain the actual climbing slope of test car specifically includes:
and acquiring the gravity of the test automobile, and taking the ratio of the wheel driving force of the test automobile to the gravity as the actual climbing gradient of the test automobile.
Preferably, the evaluating the performance of the clutch of the test automobile according to the actual climbing gradient and the pedal displacement specifically includes:
performing linear fitting on the actual climbing gradient and the pedal displacement to obtain a first binary linear equation of the actual climbing gradient and the pedal displacement;
obtaining a fitting climbing gradient corresponding to each pedal displacement through the first binary linear equation and the pedal displacement;
determining the linear fitting degree of the climbing gradient of the test automobile based on the actual climbing gradient and the fitting climbing gradient of the test automobile;
and evaluating the performance of the clutch of the test automobile according to the linear fitting degree of the climbing gradient of the test automobile.
Preferably, the acquiring a hub force signal of the hub force stand and a linear displacement signal of a pedal of a clutch of the test car in the test process specifically includes:
collecting a hub force signal of the hub force stand, a linear displacement signal of a pedal of a clutch of the test automobile and an engine torque signal in a test process;
correspondingly, the determining the wheel driving force of the test automobile based on the hub force signal and the pedal displacement of the clutch of the test automobile based on the linear displacement signal specifically comprises the following steps:
determining wheel driving force of the test automobile based on the hub force signal, determining pedal displacement of a clutch of the test automobile based on the linear displacement signal, and determining engine actual torque of the test automobile based on the engine torque signal;
correspondingly, the performance of the clutch of the test automobile is evaluated according to the actual climbing gradient and the pedal displacement, and the method specifically comprises the following steps:
and evaluating the performance of the clutch of the test automobile according to the actual climbing gradient, the pedal displacement and the actual torque of the engine.
Preferably, the evaluating the performance of the clutch of the test automobile according to the actual climbing gradient, the pedal displacement and the actual torque of the engine specifically includes:
performing linear fitting on the actual climbing gradient and the pedal displacement to obtain a first binary linear equation related to the actual climbing gradient and the pedal displacement, and performing linear fitting on the actual torque and the pedal displacement of the engine to obtain a second binary linear equation related to the actual torque and the pedal displacement of the engine;
determining fitting climbing gradient and engine fitting torque corresponding to each pedal displacement through the pedal displacement, the first binary linear equation and the second binary linear equation;
determining the linear fitting degree of the climbing gradient of the test automobile based on the actual climbing gradient and the fitting climbing gradient, and determining the linear fitting degree of the engine torque of the test automobile based on the actual torque of the engine and the engine fitting torque;
and evaluating the performance of the clutch of the test automobile based on the linear fitting degree of the climbing gradient of the test automobile and the linear fitting degree of the engine torque.
Preferably, the evaluating the performance of the clutch of the test automobile based on the linear fitting degree of the climbing gradient of the test automobile and the linear fitting degree of the engine torque specifically includes:
and evaluating the performance of the clutch of the test automobile according to the ratio of the linear fitting degree of the climbing gradient of the test automobile to the linear fitting degree of the engine torque.
Further, to achieve the above object, the present invention also provides a performance evaluation apparatus of an automobile clutch, the apparatus including: the performance evaluation program of the automobile clutch is stored on the memory and can run on the processor, and when being executed by the processor, the performance evaluation program of the automobile clutch realizes the steps of the performance evaluation method of the automobile clutch.
In order to achieve the above object, the present invention further provides a storage medium having stored thereon a performance evaluation program for an automobile clutch, the program being executed by a processor to implement the steps of the method for evaluating the performance of an automobile clutch as described above.
In order to achieve the above object, the present invention also provides a performance evaluation device for an automobile clutch, comprising:
the test module is used for testing the clutch of the test automobile fixed on the rotating hub rack;
the acquisition module is used for acquiring a hub force signal of the hub force stand and a linear displacement signal of a pedal of a clutch of the test automobile in the test process;
a determination module for determining wheel drive forces for the test vehicle based on the hub force signal and for determining pedal displacement of a clutch of the test vehicle based on the linear displacement signal;
and the evaluation module is used for evaluating the performance of the clutch of the test automobile according to the wheel driving force and the pedal displacement.
In the invention, a clutch of a test automobile fixed on a hub rack is tested, a hub force signal of the hub force rack and a linear displacement signal of a pedal of the clutch of the test automobile are collected in the test process, the wheel driving force of the test automobile is determined based on the hub force signal, the pedal displacement of the clutch of the test automobile is determined based on the linear displacement signal, and the performance of the clutch of the test automobile is evaluated according to the wheel driving force and the pedal displacement. In the invention, the performance of the assembled clutch is tested based on the hub rotating rack, so that the difference between the rack installation state of a single part and the assembly state of the whole vehicle is avoided, and the test method is simple and has strong operability.
Drawings
FIG. 1 is a schematic diagram of an apparatus architecture of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a first embodiment of a method for evaluating the performance of a clutch of a vehicle according to the present invention;
FIG. 3 is a schematic flow chart illustrating a second embodiment of a method for evaluating the performance of a clutch of a vehicle according to the present invention;
FIG. 4 is a schematic flow chart illustrating a third embodiment of a method for evaluating the performance of a clutch of a vehicle according to the present invention;
FIG. 5 is a functional block diagram of a first embodiment of an apparatus for evaluating the performance of an automobile clutch according to the present invention.
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
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an apparatus for evaluating performance of an automobile clutch in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the performance evaluation apparatus of the automobile clutch 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 comprise a Display screen (Display), and the optional user interface 1003 may also comprise 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 server separate from the processor 1001.
Those skilled in the art will appreciate that the configuration shown in fig. 1 does not constitute a limitation of the performance evaluation device of the automobile clutch, and may include more or fewer components than those shown, or some components in combination, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a storage medium, may include therein an operating device, a network communication module, a user interface module, and a performance evaluation program of the automobile clutch.
In the performance evaluation device of the automobile clutch shown in fig. 1, the network interface 1004 is mainly used for connecting a background server and performing data communication with the background server; the user interface 1003 is mainly used for connecting user equipment; the performance evaluation device of the automobile clutch calls the performance evaluation program of the automobile clutch stored in the memory 1005 through the processor 1001 and executes the performance evaluation method of the automobile clutch provided by the embodiment of the invention.
The performance evaluation apparatus of the automobile clutch calls up the performance evaluation program of the automobile clutch stored in the memory 1005 by the processor 1001 and performs the following operations:
testing a clutch of a test automobile fixed on the rotary hub rack;
collecting a hub force signal of the hub force stand and a linear displacement signal of a pedal of a clutch of the test automobile in a test process;
determining a wheel drive force of the test vehicle based on the hub force signal and a pedal displacement of a clutch of the test vehicle based on the linear displacement signal;
and evaluating the performance of the clutch of the test automobile according to the wheel driving force and the pedal displacement.
Further, the processor 1001 may call the performance evaluation program of the automobile clutch stored in the memory 1005, and also perform the following operations:
acquiring the gravity of the test automobile, and acquiring the actual climbing gradient of the test automobile through the wheel driving force and the gravity of the test automobile;
and evaluating the performance of the clutch of the test automobile according to the actual climbing gradient and the pedal displacement.
Further, the processor 1001 may call the performance evaluation program of the automobile clutch stored in the memory 1005, and also perform the following operations:
and acquiring the gravity of the test automobile, and taking the ratio of the wheel driving force of the test automobile to the gravity as the actual climbing gradient of the test automobile.
Further, the processor 1001 may call the performance evaluation program of the automobile clutch stored in the memory 1005, and also perform the following operations:
performing linear fitting on the actual climbing gradient and the pedal displacement to obtain a first binary linear equation of the actual climbing gradient and the pedal displacement;
obtaining a fitting climbing gradient corresponding to each pedal displacement through the first binary linear equation and the pedal displacement;
determining the linear fitting degree of the climbing gradient of the test automobile based on the actual climbing gradient and the fitting climbing gradient of the test automobile;
and evaluating the performance of the clutch of the test automobile according to the linear fitting degree of the climbing gradient of the test automobile.
Further, the processor 1001 may call the performance evaluation program of the automobile clutch stored in the memory 1005, and also perform the following operations:
collecting a hub force signal of the hub force stand, a linear displacement signal of a pedal of a clutch of the test automobile and an engine torque signal in a test process;
determining wheel driving force of the test automobile based on the hub force signal, determining pedal displacement of a clutch of the test automobile based on the linear displacement signal, and determining engine actual torque of the test automobile based on the engine torque signal;
and evaluating the performance of the clutch of the test automobile according to the actual climbing gradient, the pedal displacement and the actual torque of the engine.
Further, the processor 1001 may call the performance evaluation program of the automobile clutch stored in the memory 1005, and also perform the following operations:
performing linear fitting on the actual climbing gradient and the pedal displacement to obtain a first binary linear equation related to the actual climbing gradient and the pedal displacement, and performing linear fitting on the actual torque and the pedal displacement of the engine to obtain a second binary linear equation related to the actual torque and the pedal displacement of the engine;
determining fitting climbing gradient and engine fitting torque corresponding to each pedal displacement through the pedal displacement, the first binary linear equation and the second binary linear equation;
determining the linear fitting degree of the climbing gradient of the test automobile based on the actual climbing gradient and the fitting climbing gradient, and determining the linear fitting degree of the engine torque of the test automobile based on the actual torque of the engine and the engine fitting torque;
and evaluating the performance of the clutch of the test automobile based on the linear fitting degree of the climbing gradient of the test automobile and the linear fitting degree of the engine torque.
Further, the processor 1001 may call the performance evaluation program of the automobile clutch stored in the memory 1005, and also perform the following operations:
and evaluating the performance of the clutch of the test automobile according to the ratio of the linear fitting degree of the climbing gradient of the test automobile to the linear fitting degree of the engine torque.
In this embodiment, a clutch of a test automobile fixed on a hub rack is tested, a hub force signal of the hub force rack and a linear displacement signal of a pedal of the clutch of the test automobile are acquired in a test process, wheel driving force of the test automobile is determined based on the hub force signal, pedal displacement of the clutch of the test automobile is determined based on the linear displacement signal, and performance of the clutch of the test automobile is evaluated according to the wheel driving force and the pedal displacement. Based on the rotating hub rack, the performance of the assembled clutch is tested, the difference between the rack installation state of a single part and the assembly state of the whole vehicle is avoided, and the test method is simple and strong in operability.
Based on the hardware structure, the embodiment of the performance evaluation method of the automobile clutch is provided.
Referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of the method for evaluating the performance of the automobile clutch according to the invention.
In a first embodiment, the method for evaluating the performance of the automobile clutch includes the steps of:
step S10: the clutch of the test car fixed on the rotating hub stand was tested.
It should be noted that, in the scheme of the invention, in order to overcome the defects of the existing clutch performance rack test method, a power transmission performance test method based on the clutch semi-linkage state of the whole vehicle is provided aiming at the vehicle starting working condition.
In specific implementation, the performance of the automobile clutch can be tested through the following steps:
1) heating the vehicle: a tester fixes a test vehicle on the rotary hub rack and runs for a certain time at the speed of 80km/h, so that the temperature of the lubricating fluid of the transmission system of the test vehicle and the temperature of the friction plate of the clutch are kept in a normal working range;
2) parking neutral idle speed: configuring the hub rack into a constant speed mode, and setting the vehicle speed to be 0 km/h;
3) the clutch pedal is engaged to a first gear, and is slowly released until the engine is flamed out;
4) and recording the data.
Step S20: and collecting a hub force signal of the hub force stand and a linear displacement signal of a pedal of a clutch of the test automobile in a test process.
In this embodiment, the hub force signal of the hub force stand and the linear displacement signal of the pedal of the clutch of the test car may be collected by a data collection module, such as an NI9229 voltage collection module. In concrete implementation, the linear displacement sensor can be installed on an inner decorative plate above a clutch pedal and fixed by using a strong double-faced adhesive tape and a cloth adhesive tape, the linear displacement sensor is used for collecting the pedal displacement of the clutch of the test automobile and sending the collected signal to the data collection module.
Step S30: wheel drive forces of the test vehicle are determined based on the hub force signals, and pedal displacements of a clutch of the test vehicle are determined based on the linear displacement signals.
It can be understood that, in the test process, the process of slowly releasing the clutch is the process from non-contact, semi-linkage to complete combination of the clutch, and the engine is overloaded and stalled due to the large running resistance of the configured vehicle, so in the embodiment, the vehicle driving force which is increased along with the release of the clutch pedal is the transmission force in the process of semi-linkage of the clutch.
Step S40: and evaluating the performance of the clutch of the test automobile according to the wheel driving force and the pedal displacement.
In a specific implementation, the relationship between pedal displacement and wheel driving force during the test can be obtained based on wheel driving force and pedal displacement data acquired during the entire test.
It can be understood that the clutch of the test car can be considered to have better performance when the wheel driving force has a better linear relationship with the pedal displacement.
In this embodiment, the clutch of the test automobile fixed on the hub rack is tested, the hub force signal of the hub force rack and the linear displacement signal of the pedal of the clutch of the test automobile are collected in the test process, the wheel driving force of the test automobile is determined based on the hub force signal, the pedal displacement of the clutch of the test automobile is determined based on the linear displacement signal, and the performance of the clutch of the test automobile is evaluated according to the wheel driving force and the pedal displacement. Based on the rotating hub rack, the performance of the assembled clutch is tested, the difference between the rack installation state of a single part and the assembly state of the whole vehicle is avoided, and the test method is simple and strong in operability.
Referring to fig. 3, fig. 3 is a schematic flow chart of a second embodiment of the method for testing the performance of the automobile clutch according to the present invention, and the second embodiment of the method for testing the performance of the automobile clutch according to the present invention is provided based on the embodiment shown in fig. 2.
In the second embodiment, the step S40 specifically includes:
step S401: and acquiring the gravity of the test automobile, and obtaining the actual climbing gradient of the test automobile through the wheel driving force and the gravity of the test automobile.
In a specific implementation, the ratio of the wheel driving force to the gravity of the test automobile can be used as the actual climbing gradient of the test automobile.
Step S402: and evaluating the performance of the clutch of the test automobile according to the actual climbing gradient and the pedal displacement.
It should be noted that the fluctuation of the wheel driving force in the clutch combination process is large, the wheel driving force in the clutch combination process is converted into the corresponding climbing gradient, the data jitter amplitude can be reduced, and the subsequent data processing process can be simpler without affecting the evaluation result.
In concrete realization, can be right the actual grade of climbing and footboard displacement carry out linear fitting, obtain the first binary equation of once of the slope is correlated with the footboard displacement in reality, through first binary equation of once and footboard displacement obtain the fitting grade of climbing that corresponds with each footboard displacement, and the actual grade of climbing and the fitting grade of climbing that is based on test car are confirmed the linear fitting degree of the test car grade of climbing, through the linear fitting degree of the test car grade of climbing is right the performance of test car's clutch is appraised.
It should be noted that the "first" and "second" in the present embodiment do not constitute a limitation on the one-dimensional quadratic equation, and are used only for distinguishing the one-dimensional quadratic equations.
It is understood that, based on the actual climbing gradient and pedal displacement during the test, a relationship curve between the actual climbing gradient and pedal displacement can be determined, and the first dyadic equation can be obtained accordingly, specifically, there are many methods for obtaining an equation based on data, for example, the method can be implemented by the conventional EXCEL.
Further, each pedal displacement obtained in the test process can be substituted into the first-order equation, so that the fitting climbing gradient corresponding to each pedal displacement can be obtained, and it can be understood that the fitting climbing gradient is obtained based on the first-order equation and is based on the theoretical value of the fitting curve.
Based on the actual climbing gradient and the fitting climbing gradient corresponding to each pedal displacement, the linear fitting degree of the climbing gradient can be obtained through calculation.
It should be noted that there are many formulas for calculating the linear fitting degree currently, and this embodiment is not limited, and finally, the performance of the clutch of the test automobile is evaluated through the calculated linear fitting degree of the climbing slope.
It is understood that the performance of the clutch of the test automobile is evaluated by the degree of linear fitting of the climbing gradient of the test automobile, and in the specific evaluation, the linearity of the curve based on the climbing gradient and the pedal displacement is better, and accordingly, the performance of the clutch of the test automobile is better.
In the embodiment, the wheel driving force is converted into the climbing gradient in consideration of large fluctuation of the wheel driving force in the clutch combination process, the data jitter amplitude is reduced, the subsequent calculation process is simpler, meanwhile, the performance of the clutch of the test automobile is evaluated on the basis of the fitting degree, the fitting degree is an absolute quantity, the evaluation result is clearer and is contrastable.
Referring to fig. 4, fig. 4 is a schematic flow chart of a third embodiment of the method for evaluating the performance of the automobile clutch according to the present invention, and the third embodiment of the method for evaluating the performance of the automobile clutch according to the present invention is proposed based on the embodiment shown in fig. 3.
In the third embodiment, the step S20 specifically includes:
step S01: and collecting a hub force signal of the hub force stand, a linear displacement signal of a pedal of a clutch of the test automobile and an engine torque signal in the test process.
In a specific implementation, a CAN pin of an OBD interface of a vehicle CAN be connected through an NI9853CAN acquisition module to acquire an engine torque signal.
Correspondingly, the step S30 specifically includes:
step S02: determining wheel driving force of the test automobile based on the hub force signal, determining pedal displacement of a clutch of the test automobile based on the linear displacement signal, and determining engine actual torque of the test automobile based on the engine torque signal.
Correspondingly, the step S402 specifically includes:
step S03: and evaluating the performance of the clutch of the test automobile according to the actual climbing gradient, the pedal displacement and the actual torque of the engine.
In a specific implementation, linear fitting is carried out on the actual climbing gradient and the pedal displacement to obtain a first binary linear equation of the actual climbing gradient and the pedal displacement, and linear fitting is carried out on the actual torque and the pedal displacement of the engine to obtain a second binary linear equation of the actual torque and the pedal displacement of the engine; determining fitting climbing gradient and engine fitting torque corresponding to each pedal displacement through the pedal displacement, the first binary linear equation and the second binary linear equation; determining the linear fitting degree of the climbing gradient of the test automobile based on the actual climbing gradient and the fitting climbing gradient, and determining the linear fitting degree of the engine torque of the test automobile based on the actual torque of the engine and the engine fitting torque; and evaluating the performance of the clutch of the test automobile based on the linear fitting degree of the climbing gradient of the test automobile and the linear fitting degree of the engine torque.
Further, the performance of the clutch of the test automobile can be evaluated by the ratio of the linear degree of fit of the creep gradient of the test automobile to the linear degree of fit of the engine torque.
In the embodiment, the influence of the output torque of the engine on the test result is considered, the fitting degree of the torque of the engine is used for correcting the fitting degree of the climbing slope, and the accuracy of the test result is ensured.
Based on the actual climbing gradient, the actual torque of the engine and the pedal displacement of the test automobile in the test process, the first binary linear equation and the second binary linear equation can be obtained, and each pedal displacement is substituted into the first binary linear equation and the second binary linear equation, so that the fitting climbing gradient and the engine fitting torque corresponding to each pedal displacement can be obtained.
In a specific implementation, the calculation of the linear fitness of the climb gradient may be performed by the following equation (1):
wherein ikShowing the actual grade, i, of the test cark' denotes the fitted climb gradient of the test car.
Accordingly, calculation of the linear fit of the engine torque can be performed by the following formula (2):
wherein, tkRepresenting the actual torque of the engine, t, of the test vehiclek' denotes the engine fitted torque of the test car.
In specific implementation, the ratio of the linear fitting degree of the climbing gradient and the linear fitting degree of the engine torque can be further calculated and used as a final test result.
Based on the better the relation curve of the climbing gradient of the test automobile and the pedal displacement and correspondingly the better the evaluation principle of the performance of the test automobile, by combining the calculation formulas (1) and (2), it can be understood that the larger the ratio of the linear fitting degree of the climbing gradient to the linear fitting degree of the engine torque is, the better the performance of the test automobile clutch is.
In the embodiment, the influence of the engine torque on the test result is considered, and the linear fitting degree of the climbing gradient is corrected through the linear fitting degree of the engine torque matrix, so that the accuracy of the test result is further ensured.
In addition, an embodiment of the present invention further provides a storage medium, where a performance evaluation program of an automobile clutch is stored on the storage medium, and when executed by a processor, the performance evaluation program of the automobile clutch implements the following operations:
testing a clutch of a test automobile fixed on the rotary hub rack;
collecting a hub force signal of the hub force stand and a linear displacement signal of a pedal of a clutch of the test automobile in a test process;
determining a wheel drive force of the test vehicle based on the hub force signal and a pedal displacement of a clutch of the test vehicle based on the linear displacement signal;
and evaluating the performance of the clutch of the test automobile according to the wheel driving force and the pedal displacement.
Further, the performance evaluation program of the automobile clutch is further used for realizing the following operations when being executed by the processor:
acquiring the gravity of the test automobile, and acquiring the actual climbing gradient of the test automobile through the wheel driving force and the gravity of the test automobile;
and evaluating the performance of the clutch of the test automobile according to the actual climbing gradient and the pedal displacement.
Further, the performance evaluation program of the automobile clutch is further used for realizing the following operations when being executed by the processor:
and acquiring the gravity of the test automobile, and taking the ratio of the wheel driving force of the test automobile to the gravity as the actual climbing gradient of the test automobile.
Further, the performance evaluation program of the automobile clutch is further used for realizing the following operations when being executed by the processor:
performing linear fitting on the actual climbing gradient and the pedal displacement to obtain a first binary linear equation of the actual climbing gradient and the pedal displacement;
obtaining a fitting climbing gradient corresponding to each pedal displacement through the first binary linear equation and the pedal displacement;
determining the linear fitting degree of the climbing gradient of the test automobile based on the actual climbing gradient and the fitting climbing gradient of the test automobile;
and evaluating the performance of the clutch of the test automobile according to the linear fitting degree of the climbing gradient of the test automobile.
Further, the performance evaluation program of the automobile clutch is further used for realizing the following operations when being executed by the processor:
collecting a hub force signal of the hub force stand, a linear displacement signal of a pedal of a clutch of the test automobile and an engine torque signal in a test process;
determining wheel driving force of the test automobile based on the hub force signal, determining pedal displacement of a clutch of the test automobile based on the linear displacement signal, and determining engine actual torque of the test automobile based on the engine torque signal;
and evaluating the performance of the clutch of the test automobile according to the actual climbing gradient, the pedal displacement and the actual torque of the engine.
Further, the performance evaluation program of the automobile clutch is further used for realizing the following operations when being executed by the processor:
performing linear fitting on the actual climbing gradient and the pedal displacement to obtain a first binary linear equation related to the actual climbing gradient and the pedal displacement, and performing linear fitting on the actual torque and the pedal displacement of the engine to obtain a second binary linear equation related to the actual torque and the pedal displacement of the engine;
determining fitting climbing gradient and engine fitting torque corresponding to each pedal displacement through the pedal displacement, the first binary linear equation and the second binary linear equation;
determining the linear fitting degree of the climbing gradient of the test automobile based on the actual climbing gradient and the fitting climbing gradient, and determining the linear fitting degree of the engine torque of the test automobile based on the actual torque of the engine and the engine fitting torque;
and evaluating the performance of the clutch of the test automobile based on the linear fitting degree of the climbing gradient of the test automobile and the linear fitting degree of the engine torque.
Further, the performance evaluation program of the automobile clutch is further used for realizing the following operations when being executed by the processor:
and evaluating the performance of the clutch of the test automobile according to the ratio of the linear fitting degree of the climbing gradient of the test automobile to the linear fitting degree of the engine torque.
In this embodiment, a clutch of a test automobile fixed on a hub rack is tested, a hub force signal of the hub force rack and a linear displacement signal of a pedal of the clutch of the test automobile are acquired in a test process, wheel driving force of the test automobile is determined based on the hub force signal, pedal displacement of the clutch of the test automobile is determined based on the linear displacement signal, and performance of the clutch of the test automobile is evaluated according to the wheel driving force and the pedal displacement. Based on the rotating hub rack, the performance of the assembled clutch is tested, the difference between the rack installation state of a single part and the assembly state of the whole vehicle is avoided, and the test method is simple and strong in operability.
Referring to fig. 5, fig. 5 is a functional block diagram of a first embodiment of the performance evaluation device of the automobile clutch according to the present invention, and the first embodiment of the performance evaluation device of the automobile clutch according to the present invention is provided based on the performance evaluation method of the automobile clutch.
In this embodiment, the performance evaluation device for an automobile clutch includes:
and the test module 10 is used for testing the clutch of the test automobile fixed on the rotary hub rack.
It should be noted that, in the scheme of the invention, in order to overcome the defects of the existing clutch performance rack test method, a power transmission performance test method based on the clutch semi-linkage state of the whole vehicle is provided aiming at the vehicle starting working condition.
In specific implementation, the performance of the automobile clutch can be tested through the following steps:
1) heating the vehicle: a tester fixes a test vehicle on the rotary hub rack and runs for a certain time at the speed of 80km/h, so that the temperature of the lubricating fluid of the transmission system of the test vehicle and the temperature of the friction plate of the clutch are kept in a normal working range;
2) parking neutral idle speed: configuring the hub rack into a constant speed mode, and setting the vehicle speed to be 0 km/h;
3) the clutch pedal is engaged to a first gear, and is slowly released until the engine is flamed out;
4) and recording the data.
And the acquisition module 20 is used for acquiring a hub force signal of the hub force stand and a linear displacement signal of a pedal of a clutch of the test automobile in the test process.
In this embodiment, the hub force signal of the hub force stand and the linear displacement signal of the pedal of the clutch of the test car may be received by a data acquisition module, such as an NI9229 voltage acquisition module. In concrete implementation, the linear displacement sensor can be installed on an inner decorative plate above a clutch pedal and fixed by using a strong double-faced adhesive tape and a cloth adhesive tape, the linear displacement sensor is used for collecting the pedal displacement of the clutch of the test automobile and sending the collected signal to the data collection module.
A determination module 30 for determining wheel drive forces for the test vehicle based on the hub force signal and pedal displacement of a clutch of the test vehicle based on the wire displacement signal.
It can be understood that, in the test process, the process of slowly releasing the clutch is the process from non-contact, semi-linkage to complete combination of the clutch, and the engine is overloaded and stalled due to the large running resistance of the configured vehicle, so in the embodiment, the vehicle driving force which is increased along with the release of the clutch pedal is the transmission force in the process of semi-linkage of the clutch.
And the evaluation module 40 is used for evaluating the performance of the clutch of the test automobile according to the wheel driving force and the pedal displacement.
In a specific implementation, the relationship between pedal displacement and wheel driving force during the test can be obtained based on wheel driving force and pedal displacement data acquired during the entire test.
It can be understood that the clutch of the test car can be considered to have better performance when the wheel driving force has a better linear relationship with the pedal displacement.
In this embodiment, the clutch of the test automobile fixed on the hub rack is tested, the hub force signal of the hub force rack and the linear displacement signal of the pedal of the clutch of the test automobile are collected in the test process, the wheel driving force of the test automobile is determined based on the hub force signal, the pedal displacement of the clutch of the test automobile is determined based on the linear displacement signal, and the performance of the clutch of the test automobile is evaluated according to the wheel driving force and the pedal displacement. Based on the rotating hub rack, the performance of the assembled clutch is tested, the difference between the rack installation state of a single part and the assembly state of the whole vehicle is avoided, and the test method is simple and strong in operability.
It can be understood that each module in the performance evaluation device of the automobile clutch is also used for realizing each step in the method, and the details are not repeated here.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The use of the words first, second, third, etc. do not denote any order, but rather the words are to be construed as names.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention or portions thereof that contribute to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk), and includes several instructions for enabling a terminal smart tv (which may be a mobile phone, a computer, a server, an air conditioner, or a network smart tv, etc.) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A method for evaluating performance of an automobile clutch, comprising the steps of:
testing a clutch of a test automobile fixed on the rotary hub rack;
collecting a hub force signal of the hub rack and a linear displacement signal of a pedal of a clutch of the test automobile in a test process;
determining a wheel drive force of the test vehicle based on the hub force signal and a pedal displacement of a clutch of the test vehicle based on the linear displacement signal;
evaluating the performance of a clutch of the test automobile according to the wheel driving force and the pedal displacement;
the evaluating the performance of the clutch of the test automobile according to the wheel driving force and the pedal displacement includes:
acquiring the gravity of the test automobile, and acquiring the actual climbing gradient of the test automobile through the wheel driving force and the gravity of the test automobile;
evaluating the performance of the clutch of the test automobile according to the actual climbing gradient and the pedal displacement;
the evaluating the performance of the clutch of the test automobile according to the actual climbing gradient and the pedal displacement comprises the following steps of:
performing linear fitting on the actual climbing gradient and the pedal displacement to obtain a first binary linear equation of the actual climbing gradient and the pedal displacement;
obtaining a fitting climbing gradient corresponding to each pedal displacement through the first binary linear equation and the pedal displacement;
determining the linear fitting degree of the climbing gradient of the test automobile based on the actual climbing gradient and the fitting climbing gradient of the test automobile;
and evaluating the performance of the clutch of the test automobile according to the linear fitting degree of the climbing gradient of the test automobile.
2. The method according to claim 1, wherein the obtaining of the gravity of the test automobile and the obtaining of the actual climbing gradient of the test automobile through the wheel driving force and the gravity of the test automobile specifically comprise:
and acquiring the gravity of the test automobile, and taking the ratio of the wheel driving force of the test automobile to the gravity as the actual climbing gradient of the test automobile.
3. The method of claim 2, wherein collecting the hub force signal of the hub rig and the linear displacement signal of the pedal of the clutch of the test car during the test comprises:
collecting a hub force signal of the hub rack, a linear displacement signal of a pedal of a clutch of the test automobile and an engine torque signal in a test process;
correspondingly, the determining the wheel driving force of the test automobile based on the hub force signal and the pedal displacement of the clutch of the test automobile based on the linear displacement signal specifically comprises the following steps:
determining wheel driving force of the test automobile based on the hub force signal, determining pedal displacement of a clutch of the test automobile based on the linear displacement signal, and determining engine actual torque of the test automobile based on the engine torque signal;
correspondingly, the performance of the clutch of the test automobile is evaluated according to the actual climbing gradient and the pedal displacement, and the method specifically comprises the following steps:
and evaluating the performance of the clutch of the test automobile according to the actual climbing gradient, the pedal displacement and the actual torque of the engine.
4. The method according to claim 3, wherein the evaluating the performance of the clutch of the test automobile based on the actual grade climb, the pedal displacement and the actual torque of the engine comprises:
performing linear fitting on the actual climbing gradient and the pedal displacement to obtain a first binary linear equation related to the actual climbing gradient and the pedal displacement, and performing linear fitting on the actual torque and the pedal displacement of the engine to obtain a second binary linear equation related to the actual torque and the pedal displacement of the engine;
determining a fitting climbing gradient and an engine fitting torque corresponding to each pedal displacement through the pedal displacement, a first binary linear equation and a second binary linear equation;
determining the linear fitting degree of the climbing gradient of the test automobile based on the actual climbing gradient and the fitting climbing gradient, and determining the linear fitting degree of the engine torque of the test automobile based on the actual torque of the engine and the engine fitting torque;
and evaluating the performance of the clutch of the test automobile based on the linear fitting degree of the climbing gradient of the test automobile and the linear fitting degree of the engine torque.
5. The method of claim 4, wherein evaluating the performance of the clutch of the test vehicle based on the linear degree of fit of the test vehicle creep slope and the linear degree of fit of the engine torque comprises:
and evaluating the performance of the clutch of the test automobile according to the ratio of the linear fitting degree of the climbing gradient of the test automobile to the linear fitting degree of the engine torque.
6. An apparatus for evaluating performance of an automobile clutch, characterized by comprising: a memory, a processor, and a performance evaluation program of an automobile clutch stored on the memory and operable on the processor, the performance evaluation program of the automobile clutch implementing the steps of the performance evaluation method of the automobile clutch according to any one of claims 1 to 5 when executed by the processor.
7. A storage medium, characterized in that a performance evaluation program of an automobile clutch is stored thereon, which when executed by a processor implements the steps of the performance evaluation method of an automobile clutch according to any one of claims 1 to 5.
8. A performance evaluation device for an automobile clutch, characterized by comprising:
the test module is used for testing the clutch of the test automobile fixed on the rotating hub rack;
the acquisition module is used for acquiring a hub force signal of the hub rack and a linear displacement signal of a pedal of a clutch of the test automobile in the test process;
a determination module for determining wheel drive forces for the test vehicle based on the hub force signal and for determining pedal displacement of a clutch of the test vehicle based on the linear displacement signal;
the evaluation module is used for evaluating the performance of the clutch of the test automobile according to the wheel driving force and the pedal displacement;
the evaluation module is further used for acquiring the gravity of the test automobile and obtaining the actual climbing gradient of the test automobile through the wheel driving force and the gravity of the test automobile; evaluating the performance of the clutch of the test automobile according to the actual climbing gradient and the pedal displacement;
the evaluation module is also used for determining the linear fitting degree of the climbing gradient of the test automobile based on the actual climbing gradient and the fitting climbing gradient of the test automobile;
and evaluating the performance of the clutch of the test automobile according to the linear fitting degree of the climbing gradient of the test automobile.
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| CN113237671A (en) * | 2021-05-19 | 2021-08-10 | 东风柳州汽车有限公司 | Electric vehicle accelerator calibration method and device |
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| JPH089626Y2 (en) * | 1989-05-08 | 1996-03-21 | 株式会社明電舎 | Power test equipment |
| US5955662A (en) * | 1997-03-06 | 1999-09-21 | Snap-On Technologies, Inc. | Dynamometer and calibration technique thereof |
| EP1762833B1 (en) * | 2005-09-10 | 2011-12-14 | Schaeffler Technologies AG & Co. KG | Clutch testing method |
| CN101793602B (en) * | 2010-03-31 | 2012-08-22 | 浙江铁流离合器股份有限公司 | Subjective assessment test bench and test method for operating performance of clutches |
| CN202066699U (en) * | 2011-01-30 | 2011-12-07 | 宁波市北仑夏冰电子有限公司 | Multifunctional automobile detector |
| CN202013279U (en) * | 2011-04-26 | 2011-10-19 | 浙江金刚汽车有限公司 | Clutch control system testboard |
| CN109297707B (en) * | 2018-10-25 | 2019-11-26 | 安徽江淮汽车集团股份有限公司 | A method of carrying out driven by clutches efficiency test on vehicle |
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