Performance detection method, system and device for spring composite shock absorber

Abstract

The invention provides a method, a system and a device for detecting the performance of a spring composite shock absorber, and the device for detecting the performance of the spring composite shock absorber is constructed by collecting the parameter information of an engine on a detection vehicle and a vehicle type carried by the engine. The working states of the engine and the spring composite damper in a driving scene are simulated in combination with the actual driving condition of the vehicle, the current noise data of the engine and the spring composite damper are collected on the premise that no vehicle driving noise exists, and whether the current data meet a preset amplitude interval or not is evaluated; therefore, whether the current spring composite shock absorber meets the requirements or not is finally determined, the scene is truly restored, and the accuracy of noise amplitude detection is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle NVH detection, and in particular to a method, system and device for detecting the performance of a spring composite shock absorber. Background Art

[0002] Vehicle NVH is an important concept in the automotive industry, which refers to the comprehensive performance of noise, vibration and harshness. These three aspects are directly related to the ride comfort and driving quality of the vehicle, and are key indicators for evaluating vehicle manufacturing processes and performance.

[0003] Spring composite shock absorbers are currently gradually being used in domestic high-end automobiles and ship power. Their working principle is to use internal springs to generate dynamic effects and use rubber damping to consume excitation energy, thereby achieving lower torque fluctuations in the engine and further improving the engine NVH effect. The spring composite shock absorber itself is prone to spring knocking noise because it uses arc springs for vibration isolation, and the internal springs have free angles and limits, which will cause repeated knocking with the metal flange or shell during the working process.

[0004] Currently, the industry usually conducts driving evaluation tests after vehicle assembly to evaluate whether there are abnormal noises in the composite shock absorber. However, under normal driving conditions, the sound of the composite shock absorber part is easily covered. Only under certain specific speeds and front-end load conditions, such as when the vehicle is idling and loaded, will the abnormal noise of the spring composite shock absorber become prominent. In addition, the efficiency of the off-line driving evaluation of the whole vehicle in intercepting the abnormal noise of the composite shock absorber is low, and the accuracy is poor, which poses a risk of production rework. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide a spring composite shock absorber performance detection method, system and device, so as to fundamentally solve the problem that the existing vehicle off-line driving evaluation has low efficiency and poor accuracy in intercepting abnormal noise of composite shock absorbers, and there is a risk of production rework.

[0006] A method for detecting performance of a spring composite shock absorber according to an embodiment of the present invention comprises: Obtaining parameter information of the engine and vehicle type of the current vehicle, and constructing an adaptive spring composite shock absorber performance detection device according to the parameter information; Conducting a vehicle NVH operating condition test, starting the engine and completing the vehicle NVH operating condition test in sequence according to a plurality of sets of preset test conditions, and obtaining a noise amplitude; Determine whether each of the noise amplitudes is within a preset amplitude range; If yes, the composite shock absorber is judged to be qualified; If not, the composite shock absorber is judged to be unqualified.

[0007] Furthermore, the parameter information includes at least the idle speed of the engine, the maximum torque of the front-end accessories, the belt tension, the maximum speed and the maximum surface temperature of the composite shock absorber in the working state.

[0008] Furthermore, the steps of conducting a vehicle NVH operating condition test, starting the engine and completing the vehicle NVH operating condition test in sequence according to a plurality of sets of preset test conditions, and obtaining the noise amplitude include: The spring composite shock absorber performance detection device is driven by the engine to perform 2-3 NVH working condition tests in an initial state, complete a first sub-working condition test, and determine whether the first noise amplitude meets the preset amplitude range after obtaining the first noise amplitude; If yes, then perform the second sub-condition test.

[0009] Furthermore, after the step of driving the spring composite shock absorber performance detection device by the engine to perform 2-3 NVH working condition tests in the initial state, completing the first sub-working condition test, and obtaining the first noise amplitude and determining whether the first noise amplitude meets the preset amplitude range, the method further includes: The spring composite shock absorber is driven by the engine, and the speed of the spring composite shock absorber is increased to 750 rpm within 0.5 s, and the speed is run for 1-2 min to complete the second sub-operating condition test, and after obtaining the second noise amplitude, it is determined whether the second noise amplitude meets the preset amplitude range; If yes, execute the third sub-condition test.

[0010] Furthermore, after the step of driving the spring composite shock absorber by the engine, increasing the speed of the spring composite shock absorber to 750 rpm within 0.5 s, and running for 1-2 min, completing the second sub-operating condition test, and obtaining the second noise amplitude and determining whether the second noise amplitude meets the preset amplitude range, the method further includes: The spring composite shock absorber is driven by the engine, and the speed of the spring composite shock absorber is increased to 6000 rpm within 2 seconds, and the spring composite shock absorber is operated for 1-2 minutes to complete the third sub-operating condition test, and after obtaining the third noise amplitude, it is determined whether the third noise amplitude meets the preset amplitude range; If yes, execute the fourth sub-condition test.

[0011] Furthermore, after the step of driving the spring composite shock absorber by the engine, increasing the speed of the spring composite shock absorber to 6000 rpm within 2 seconds, and running for 1-2 minutes, completing the third sub-operating condition test, and obtaining the third noise amplitude and determining whether the third noise amplitude meets the preset amplitude range, the method further includes: The spring and shock absorber are heated to 80° C.-100° C. and kept warm for 10-15 minutes, and then the first sub-condition, the second sub-condition and the third sub-condition are repeated. A spring composite shock absorber performance detection system according to an embodiment of the present invention comprises: An acquisition module is used to acquire parameter information of the engine and the vehicle model of the current vehicle, and to construct an adaptive spring composite shock absorber performance detection device according to the parameter information; A test module, used for performing a vehicle NVH condition test, starting the engine and completing the vehicle NVH condition test in sequence according to a plurality of sets of preset test conditions, and obtaining a noise amplitude; A judging module, used to judge whether each of the noise amplitudes is within a preset amplitude range, and if so, execute the first executing module, and if not, execute the second executing module; A first execution module, used for judging whether the composite shock absorber is qualified; The second execution module is used to determine that the composite shock absorber is unqualified.

[0012] The present invention also proposes a spring composite shock absorber performance detection device, which includes a fixed plate, a motor respectively arranged on the fixed plate, a composite spring shock absorber, a power element, a tensioner, a belt for connecting the tensioner, the power element, the composite spring shock absorber and the motor in series, an NVH evaluation device arranged near the spring composite shock absorber, and an integrated control console electrically connected to the NVH evaluation device, to implement the above-mentioned spring composite shock absorber performance detection method.

[0013] Compared with the prior art: the spring composite shock absorber performance detection method in the above-mentioned embodiment of the present invention constructs an adaptive spring composite shock absorber performance detection device by collecting and detecting parameter information of the engine and the vehicle model on the vehicle, and simulates the working state of the engine and the spring composite shock absorber in the driving scenario in combination with the actual driving situation of the vehicle, and collects the noise data of the current engine and spring composite shock absorber under the premise of no car driving noise, and evaluates whether the current data meets the preset amplitude range, so as to finally determine whether the current spring composite shock absorber meets the requirements, which solves the problem that the existing vehicle off-line driving evaluation has low efficiency and poor accuracy in intercepting abnormal noise of composite shock absorbers, and there is a risk of production rework. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a flow chart of the performance detection method of the spring composite shock absorber in the first embodiment of the present invention; Figure 2 It is a structural schematic diagram of a spring composite shock absorber performance detection method system in a second embodiment of the present invention; Figure 3 It is a structural schematic diagram of a spring composite shock absorber performance detection device in a third embodiment of the present invention; Figure 4 It is a schematic structural diagram of the integrated control console in the spring composite shock absorber performance detection device in the third embodiment of the present invention.

[0015] The following specific implementations will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0016] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0017] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0019] Embodiment 1 See also Figure 1 , shown is a spring composite shock absorber performance detection method in the first embodiment of the present invention, and the method specifically includes steps S01 to S05.

[0020] Step S01, obtaining parameter information of the engine and the vehicle model of the current vehicle, and constructing an adaptive spring composite shock absorber performance detection device according to the parameter information.

[0021] In the specific implementation, first obtain the parameter information of the engine and the vehicle model of the current vehicle, where the parameter information at least includes the engine's idle speed, the maximum torque of the front-end accessories, the belt tension, the maximum speed and the maximum surface temperature information of the composite shock absorber in the working state, and construct an adaptive spring composite shock absorber performance detection device based on the above information. It can be understood that a model of the engine and spring composite shock absorber adapted to the current vehicle model is constructed, and the model specifically includes a fixed plate, motors respectively arranged on the fixed plate, a composite spring shock absorber, a power element, a tensioner, a belt for connecting the tensioner, the power element, the composite spring shock absorber and the motor in series, an NVH evaluation device arranged near the spring composite shock absorber, and an integrated control console electrically connected to the NVH evaluation device. Then, according to the current vehicle engine's Belt tension, adjust the tensioning pressure of the tensioner on the belt in the model. It is understandable that the tensioner elastic force should be confirmed in advance to ensure that the belt tension is consistent with the elastic force of the vehicle assembly state, and the load size of the power element is consistent with the maximum working load of the composite shock absorber vehicle, so as to ensure the accuracy of the subsequent test data restored by the model. In addition, the belt chord length is generally guaranteed to be between 100mm and 300mm. The tensioner adjusts the size of the belt force, and the power element adjusts the size of the accessory drive torque. The NVH evaluation equipment is placed one meter in front of the composite shock absorber to collect the total amplitude information of the composite shock absorber noise, and the information is displayed through the integrated console. The motor drive speed signal is synchronously fed back to the integrated console. It should also be noted that for the sake of ease of understanding, the motor described above and the engine in the subsequent test steps are the same device name.

[0022] Step S02, perform a vehicle NVH condition test, start the engine and complete the vehicle NVH condition test in sequence according to multiple sets of preset test conditions, and obtain the noise amplitude.

[0023] Step S03, determining whether each noise amplitude is within a preset amplitude range, if yes, executing step S04, if no, executing step S05; Step S04, judging whether the composite shock absorber is qualified; Step S05, judging that the composite shock absorber is unqualified.

[0024] Based on the specific implementation of steps S02 to S05, after completing the construction of the spring composite shock absorber performance detection device in step S01 according to the current vehicle, a vehicle NVH condition test is performed, which includes four sub-condition tests. First, through the first sub-condition test, the spring composite shock absorber performance detection device is driven by the engine, and 2-3 NVH condition tests are performed in the initial state. The noise data is uniformly collected by the NVH evaluation equipment and imported into the integrated console for analysis to complete the first sub-condition test. After obtaining the first noise amplitude in the process, it is determined whether the first noise amplitude fills the preset amplitude range. It should be noted that the amplitude range is between 6.05-6.25 points, which are all qualified abnormal noise ranges. The second sub-condition test is performed. If it is not in this range, the first sub-condition debugging fails and the current composite shock absorber is unqualified.

[0025] Next, the second sub-condition test is carried out. The spring composite shock absorber is driven by the engine, and the speed of the spring composite shock absorber is increased to 750rpm within 0.5s and runs for 1-2min. During the process, the NVH evaluation equipment collects the noise data in this condition, completes the second sub-condition test for this sub-condition, and obtains the second noise amplitude. It is determined whether the second noise amplitude meets the noise amplitude range of 6.05-6.25 points. If so, the condition test is qualified and the third sub-condition test is executed. If not, the current sub-condition debugging fails and the current composite shock absorber is determined to be unqualified.

[0026] Next, the third sub-condition test is carried out, in which the spring composite shock absorber is driven by the engine, and the speed of the spring composite shock absorber is increased to 6000rpm within 2s, and it is run for 1-2min to complete the third sub-condition test. After obtaining the third noise amplitude, it is determined whether the third noise amplitude meets the noise amplitude range of 6.05-6.25 points. If so, the condition test is qualified and the fourth sub-condition test is executed. If not, the current sub-condition debugging fails and the current composite shock absorber is determined to be unqualified.

[0027] Finally, the fourth sub-condition test is carried out, and the spring composite shock absorber is heated to 80℃-100℃. It should be noted that the heating device for heating the spring composite shock absorber can be a heating box that also has a heat preservation effect. In some optional embodiments, the spring composite shock absorber performance detection device can also be set in the heating box, and the first sub-condition, the second sub-condition and the third sub-condition are repeated after keeping warm for 10-15 minutes. The purpose of this condition is to evaluate whether the composite shock absorber has abnormal sound due to thermal engine, so that the final test data is more in line with the actual situation. The noise information of this sub-condition is also obtained by the NVH evaluation equipment and fed back to the integrated console. The evaluation and judgment are made according to the noise amplitude range between 6.05-6.25 points, and the final evaluation result is output.

[0028] In summary, the spring composite shock absorber performance detection method in the above embodiment of the present invention constructs an adaptive spring composite shock absorber performance detection device by collecting and detecting parameter information of the engine and the vehicle model on the vehicle, and simulates the working state of the engine and the spring composite shock absorber in the driving scene in combination with the actual driving situation of the vehicle, and collects the noise data of the current engine and the spring composite shock absorber under the premise of no car driving noise, and evaluates whether the current data meets the preset amplitude range, so as to finally determine whether the current spring composite shock absorber meets the requirements.

[0029] Embodiment 2 Another aspect of the present invention is to provide a spring composite shock absorber performance detection system, please refer to Figure 2 , which is a spring composite shock absorber performance detection system in a second embodiment of the present invention, the system comprises: The acquisition module 11 is used to obtain the parameter information of the engine and the vehicle model of the current vehicle, and to construct an adaptive spring composite shock absorber performance detection device according to the parameter information; The test module 12 is used to perform a vehicle NVH condition test, start the engine and complete the vehicle NVH condition test in sequence according to multiple sets of preset test conditions, and obtain the noise amplitude; A judging module 13 is used to judge whether each noise amplitude is within a preset amplitude range, and if so, execute the first executing module 14, and if not, execute the second executing module 15; The first execution module 14 is used to determine whether the composite shock absorber is qualified; The second execution module 15 is used to determine whether the composite shock absorber is unqualified.

[0030] Furthermore, in some optional embodiments of the present invention, the testing module 12 further includes: The first test unit is used to drive the spring composite shock absorber performance detection device through the engine, perform 2-3 NVH working condition tests in the initial state, complete the first sub-working condition test, and determine whether the first noise amplitude is full of the preset amplitude range after obtaining the first noise amplitude. If so, execute the second test unit, if not, execute the second execution module 15; The second test unit drives the spring composite shock absorber through the engine, and increases the speed of the spring composite shock absorber to 750rpm within 0.5s, and runs for 1-2min to complete the second sub-condition test, and after obtaining the second noise amplitude, it is determined whether the second noise amplitude meets the preset amplitude range. If so, the third test unit is executed, if not, the second execution module 15 is executed.

[0031] The third test unit drives the spring composite shock absorber through the engine, and increases the speed of the spring composite shock absorber to 6000rpm within 2s, and runs for 1-2min to complete the third sub-condition test, and after obtaining the third noise amplitude, it is determined whether the third noise amplitude meets the preset amplitude range. If so, the fourth test unit is executed, if not, the second execution module 15 is executed.

[0032] The fourth test unit heats the spring and shock absorber to 80°C-100°C, keeps the temperature for 10-15 minutes, and then repeats the first sub-condition, the second sub-condition and the third sub-condition to evaluate whether the composite shock absorber has abnormal thermal noise. If yes, execute the first execution module 14, if not, execute the second execution module 15.

[0033] Embodiment 3 Another aspect of the present invention also provides a spring composite shock absorber performance detection device, see Figure 3 to Figure 4 , shown is a spring composite shock absorber performance detection device according to a third embodiment of the present invention, comprising a fixed plate 2, a motor 1, a composite spring shock absorber 3, a power element 5, a tensioner 4, a belt 6 for connecting the tensioner 4, the power element 5, the composite spring shock absorber 3 and the motor 1 in series, an NVH evaluation device 7 arranged near the spring composite shock absorber 3, and an integrated control console 8 electrically connected to the NVH evaluation device 7.

[0034] In addition, the integrated console 8 also includes a memory 20, a processor 10, and a computer program 30 stored in the memory and executable on the processor. When the processor 10 executes the computer program 30, the spring composite shock absorber performance detection method as described above is implemented.

[0035] Specifically, the post-processing high mileage degradation assessment device may be a processor 10, which in some embodiments may be a central processing unit (CPU), a controller, a microcontroller, a microprocessor or other data processing chip, for running program codes or processing data stored in the memory 20, such as executing access restriction programs.

[0036] Among them, the memory 20 includes at least one type of readable storage medium, and the readable storage medium includes flash memory, hard disk, multimedia card, card-type memory (for example, SD or DX memory, etc.), magnetic memory, disk, optical disk, etc. In some embodiments, the memory 20 can be an internal storage unit of the planar design review system, such as the hard disk of the post-processing high mileage degradation evaluation system. In other embodiments, the memory 20 can also be an external storage system of the post-processing high mileage degradation evaluation system, such as a plug-in hard disk equipped on the post-processing high mileage degradation evaluation system, a smart memory card (Smart MediaCard, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. Further, the memory 20 can also include both an internal storage unit and an external storage system of the post-processing high mileage degradation evaluation system. The memory 20 can not only be used to store application software and various types of data installed in the post-processing high mileage degradation evaluation system, but also be used to temporarily store data that has been output or is to be output.

[0037] It should be pointed out that Figure 4 The structure shown does not constitute a limitation on the post-treatment high mileage degradation evaluation system. In other embodiments, the post-treatment high mileage degradation evaluation system may include fewer or more components than shown in the figure, or combine certain components, or arrange the components differently.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0039] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for testing the performance of a spring composite shock absorber, characterized in that: The method comprises: Obtaining parameter information of the engine and vehicle type of the current vehicle, and constructing an adaptive spring composite shock absorber performance detection device according to the parameter information; Conducting a vehicle NVH operating condition test, starting the engine and completing the vehicle NVH operating condition test in sequence according to a plurality of sets of preset test conditions, and obtaining a noise amplitude; Determine whether each of the noise amplitudes is within a preset amplitude range; If yes, the composite shock absorber is judged to be qualified; If not, the composite shock absorber is judged to be unqualified.

2. A spring composite shock absorber performance detection method according to claim 1, characterized in that: The parameter information at least includes the idle speed of the engine, the maximum torque of the front-end accessories, the belt tension, the maximum speed and the maximum surface temperature of the composite shock absorber in the working state.

3. A spring composite shock absorber performance detection method according to claim 2, characterized in that: The steps of conducting a vehicle NVH operating condition test, starting the engine and completing the vehicle NVH operating condition test in sequence according to a plurality of sets of preset test conditions, and obtaining the noise amplitude include: The spring composite shock absorber performance detection device is driven by the engine to perform 2-3 NVH working condition tests in an initial state, complete a first sub-working condition test, and determine whether the first noise amplitude meets the preset amplitude range after obtaining the first noise amplitude; If yes, then perform the second sub-condition test.

4. A spring composite shock absorber performance detection method according to claim 3, characterized in that: After the step of driving the spring composite shock absorber performance detection device by the engine, performing 2-3 NVH working condition tests in the initial state, completing the first sub-working condition test, and obtaining the first noise amplitude and determining whether the first noise amplitude meets the preset amplitude range, the method further includes: The spring composite shock absorber is driven by the engine, and the speed of the spring composite shock absorber is increased to 750 rpm within 0.5 s, and the speed is run for 1-2 min to complete the second sub-operating condition test, and after obtaining the second noise amplitude, it is determined whether the second noise amplitude meets the preset amplitude range; If yes, execute the third sub-condition test.

5. A spring composite shock absorber performance detection method according to claim 4, characterized in that: After the step of driving the spring composite shock absorber by the engine, increasing the speed of the spring composite shock absorber to 750 rpm within 0.5 s, and running for 1-2 min, completing the second sub-operating condition test, and obtaining the second noise amplitude and determining whether the second noise amplitude meets the preset amplitude range, the method further includes: The spring composite shock absorber is driven by the engine, and the speed of the spring composite shock absorber is increased to 6000 rpm within 2 seconds, and the spring composite shock absorber is operated for 1-2 minutes to complete the third sub-operating condition test, and after obtaining the third noise amplitude, it is determined whether the third noise amplitude meets the preset amplitude range; If yes, execute the fourth sub-condition test.

6. A spring composite shock absorber performance detection method according to claim 1, characterized in that: After the step of driving the spring composite shock absorber by the engine, increasing the speed of the spring composite shock absorber to 6000 rpm within 2 seconds, and running for 1-2 minutes, completing the third sub-operating condition test, and obtaining the third noise amplitude and determining whether the third noise amplitude meets the preset amplitude range, the method further includes: The spring-loaded shock absorber is heated to 80° C.-100° C. and kept warm for 10-15 minutes, and then the first sub-operating condition, the second sub-operating condition and the third sub-operating condition are repeated to evaluate whether the composite shock absorber has a thermal engine abnormal noise problem.

7. A spring composite shock absorber performance detection system, characterized in that: The system comprises: An acquisition module is used to acquire parameter information of the engine and the vehicle model of the current vehicle, and to construct an adaptive spring composite shock absorber performance detection device according to the parameter information; A test module, used for performing a vehicle NVH working condition test, starting the engine and completing the vehicle NVH working condition test in sequence according to a plurality of sets of preset test working conditions, and obtaining a noise amplitude; A judging module, used to judge whether each of the noise amplitudes is within a preset amplitude range, and if so, execute the first executing module, and if not, execute the second executing module; A first execution module, used for judging whether the composite shock absorber is qualified; The second execution module is used to determine that the composite shock absorber is unqualified.

8. A spring composite shock absorber performance detection device, used to implement the spring composite shock absorber performance detection method as claimed in any one of claims 1 to 6, characterized in that: The spring composite shock absorber performance detection device includes a fixed plate, a motor respectively arranged on the fixed plate, a composite spring shock absorber, a power element, a tensioner, a belt for connecting the tensioner, the power element, the composite spring shock absorber and the motor in series, an NVH evaluation device arranged near the spring composite shock absorber, and an integrated control console electrically connected to the NVH evaluation device.

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