Engine crankshaft displacement measuring device, vehicle, method and data acquisition system

Abstract

The invention relates to the technical field of vehicles, in particular to an engine crankshaft displacement measuring device, a vehicle, a method and a data acquisition system.The device comprises a measuring plane which is arranged at the front end of a crankshaft belt pulley of an engine, is parallel to the front end face of the crankshaft belt pulley and is arranged in a non-contact mode; the eddy current displacement sensor is arranged on the measuring plane and used for measuring displacement data between the eddy current displacement sensor and the front end face of the crankshaft belt pulley; and the data acquisition system is used for acquiring displacement data output by the at least one eddy current displacement sensor and determining crankshaft displacement data of the engine according to the displacement data. Therefore, the problems of complex operation, low measurement efficiency, limited accuracy and the like of a traditional crankshaft displacement measurement mode are solved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to an engine crankshaft movement measurement device, a vehicle, a method and a data acquisition system. Background Art

[0002] In the field of vehicle internal combustion engine technology, the crankshaft is one of the core components of the engine, and its operating status directly affects the overall performance and service life of the engine. The crankshaft movement refers specifically to the movement of the crankshaft in the axial direction, which directly affects the working efficiency and reliability of the engine and is crucial for evaluating the internal mechanical status of the engine.

[0003] When the crankshaft movement exceeds the normal range, additional dynamic factors will be introduced into the rotation of the crankshaft, resulting in unnecessary wear and vibration. Not only will it consume more energy and cause engine performance to decline, such as reduced output power and increased fuel consumption, but it will also cause accelerated wear of these parts due to the increased relative movement between the crankshaft and key parts that support its operation, such as bearings and thrust washers. Over time, wear will further expand the original gap, thereby increasing the crankshaft movement, forming a cycle of continuous deterioration, which may eventually lead to engine failure. In addition, a large amount of crankshaft movement will also cause the noise level and vibration of the engine to increase when it is working, which not only reduces the driving comfort of the vehicle, but may also indirectly have an adverse effect on other components inside the engine, accelerating their aging or damage.

[0004] In the related art, commonly used technical means are dial indicator measurement method, plug gauge measurement method and vibration sensor measurement method. Among them, the dial indicator measurement method and plug gauge measurement method require the engine cylinder block to be disassembled during measurement, and a dial indicator is used to measure or a feeler gauge is used to insert the gap between the crankshaft and the main bearing seat for measurement. The operation is complicated and it is impossible to measure the crankshaft movement under the actual operation of the engine. The measurement efficiency is low and the accuracy is limited. The vibration sensor measurement method requires the sensor to be arranged at the main bearing seat in the engine, and the engine oil pan needs to be disassembled and assembled. In the data processing process, the vibration signal and acceleration data need to be processed to calculate the crankshaft movement. The process is complicated and consumes test time and procedures. Summary of the invention

[0005] The present application provides an engine crankshaft movement measurement device, vehicle, method and data acquisition system to solve the problems of complex operation, low measurement efficiency and limited accuracy in the traditional method of measuring crankshaft movement.

[0006] A first aspect of the present application provides an engine crankshaft movement measurement device, comprising: a measuring plane arranged at the front end of a crankshaft pulley of the engine, wherein the measuring plane is parallel to the front end face of the crankshaft pulley and is arranged non-contactingly; at least one eddy current displacement sensor is arranged on the measuring plane, and based on the eddy current effect between the eddy current displacement sensor and the front end face of the crankshaft pulley, the displacement data between the eddy current displacement sensor and the front end face of the crankshaft pulley is measured; a data acquisition system is used to acquire displacement data output by at least one eddy current displacement sensor, and determine the engine crankshaft movement data based on the displacement data.

[0007] Optionally, the data acquisition system is also used to: obtain a correspondence table between displacement data and crankshaft movement data; and determine the crankshaft movement data corresponding to the displacement data according to the correspondence table.

[0008] Optionally, the measuring plane is fixed to the engine front cover by fixing bolts.

[0009] Optionally, the crankshaft pulley is connected to the crankshaft via a crankshaft pulley bolt.

[0010] A second aspect of the present application provides a vehicle, comprising: an engine; and an engine crankshaft movement measuring device according to the first aspect, wherein the measuring device is disposed at a front end of the engine.

[0011] The third aspect of the present application provides a method for measuring the crankshaft movement of an engine. The method is based on the engine crankshaft movement measuring device of the first aspect, wherein the method includes the following steps: collecting displacement data output by at least one eddy current displacement sensor; and determining the crankshaft movement data of the engine based on the displacement data.

[0012] Optionally, after determining the crankshaft movement data of the engine according to the displacement data, it also includes: obtaining the engine external characteristic curve; based on the crankshaft movement data and the engine external characteristic curve, analyzing the wear or breakage of the thrust plate of the engine.

[0013] The fourth aspect of the present application provides a data acquisition system, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement the engine crankshaft movement measurement method of the third aspect.

[0014] The fifth aspect of the present application provides a computer-readable storage medium having a computer program or instruction stored thereon. When the computer program or instruction is executed, the engine crankshaft movement measurement method of the third aspect is implemented.

[0015] The sixth aspect of the present application provides a computer program product, including a computer program or instructions. When the computer program or instructions are executed, the engine crankshaft movement measurement method of the third aspect is implemented.

[0016] Therefore, this application includes the following beneficial effects:

[0017] The embodiment of the present application sets a measurement plane at the front end of the crankshaft pulley of the engine, sets at least one eddy current displacement sensor on the measurement plane, and measures the displacement data between the eddy current displacement sensor and the front end face of the crankshaft pulley, and uses a data acquisition system to collect the output displacement data, and determines the crankshaft drifting data of the engine according to the displacement data, and accurately obtains the crankshaft drifting data of the engine, so as to realize monitoring of the crankshaft drifting amount of the engine when it is running under different working conditions, without disassembling the engine, and the measured data is clear and intuitive, which improves the measurement efficiency. Thus, the problems of complex operation, low measurement efficiency and limited accuracy of the traditional method of measuring the crankshaft drifting are solved.

[0018] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0020] Figure 1 This is a structural example diagram of an engine crankshaft movement measurement device provided according to an embodiment of the present application;

[0021] Figure 2 This is an example diagram of an engine crankshaft movement measurement device according to an embodiment of the present application;

[0022] Figure 3 A schematic diagram of a flow chart of a method for measuring engine crankshaft movement provided in accordance with an embodiment of the present application;

[0023] Figure 4 Schematic diagram of the structure of a data acquisition system according to an embodiment of the present application.

[0024] Explanation of the accompanying drawings: 1- eddy current displacement sensor; 2- eddy current displacement sensor; 3- test auxiliary tool plate; 4- bolt; 5- bolt; 6- engine front cover; 7- crankshaft pulley; 8- crankshaft pulley bolt; 9- crankshaft. DETAILED DESCRIPTION

[0025] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0026] The following describes the engine crankshaft sway measurement device, vehicle, method and data acquisition system of the embodiment of the present application with reference to the accompanying drawings. In view of the problems mentioned in the above background technology that the traditional method of measuring the crankshaft sway is complicated to operate, has low measurement efficiency and limited accuracy, the present application provides an engine crankshaft sway measurement device, which is provided by setting a measurement plane at the front end of the crankshaft pulley of the engine, and setting at least one eddy current displacement sensor on the measurement plane, which is used to measure the displacement data between the eddy current displacement sensor and the front end face of the crankshaft pulley, and using a data acquisition system to collect the output displacement data, and determine the engine crankshaft sway data according to the displacement data, and accurately obtain the engine crankshaft sway data, which can realize the monitoring of the crankshaft sway size when the engine is running under different working conditions, without disassembling the engine, and the measured data is clear and intuitive, which improves the measurement efficiency. Thus, the problems of the traditional method of measuring the crankshaft sway, such as complicated operation, low measurement efficiency and limited accuracy, are solved.

[0027] Specifically, Figure 1 This is a structural example diagram of an engine crankshaft movement measurement device provided in an embodiment of the present application.

[0028] like Figure 1 As shown, the engine crankshaft movement measurement device includes: a measurement plane 101, an eddy current sensor 102 and a data acquisition system 103.

[0029] Among them, a measuring plane 101 is arranged at the front end of the crankshaft pulley of the engine, wherein the measuring plane 101 is parallel to the front end face of the crankshaft pulley and is arranged non-contact; at least one eddy current displacement sensor 102 is arranged on the measuring plane 101, and based on the eddy current effect between the eddy current displacement sensor 102 and the front end face of the crankshaft pulley, the displacement data between the eddy current displacement sensor 102 and the front end face of the crankshaft pulley is measured; a data acquisition system 103 is used to collect displacement data output by at least one eddy current displacement sensor 102, and determine the crankshaft movement data of the engine according to the displacement data.

[0030] Among them, the measurement of the eddy current displacement sensor 102 is non-contact measurement, which can avoid friction and wear caused by contact, and is not affected by impurities such as smoke, oil and water. It has strong anti-interference ability, high measurement accuracy, high sensitivity, and a linear relationship between the output signal and the measured distance, which is convenient for subsequent data processing and analysis; for setting at least one eddy current displacement sensor 102, it is generally recommended to set two eddy current displacement sensors 102 on the measuring plane 101. The reason is that the two eddy current displacement sensors 102 can perform data alignment, which increases the measurement accuracy compared to setting only one eddy current displacement sensor 102.

[0031] It can be understood that the embodiment of the present application sets a measurement plane 101 at a place parallel to and non-contacting the front end face of the crankshaft pulley of the engine, and sets at least one eddy current displacement sensor 102 on the measurement plane 101. The eddy current displacement sensor 102 uses the eddy current effect between itself and the front end face of the crankshaft pulley to measure the displacement data between the eddy current displacement sensor 102 and the front end face of the crankshaft pulley. At the same time, the data acquisition system 103 is used to collect these displacement data, and the crankshaft movement data of the engine is determined through these displacement data.

[0032] In the embodiment of the present application, the data acquisition system 103 is also used to: obtain a correspondence table between displacement data and crankshaft movement data; and determine the crankshaft movement data corresponding to the displacement data according to the correspondence table.

[0033] Among them, the correspondence table between displacement data and crankshaft movement data is pre-compiled based on actual test data.

[0034] It is understandable that the embodiment of the present application can use the data acquisition system 103 to obtain a correspondence table between displacement data and crankshaft movement data pre-compiled based on actual test data, and determine the crankshaft movement data corresponding to the displacement data through the correspondence in the table.

[0035] In the embodiment of the present application, the measuring plane 101 is fixed to the engine front cover by fixing bolts.

[0036] It can be understood that the test platform 101 of the embodiment of the present application is arranged on the engine front cover and fixed with fixing bolts.

[0037] In an embodiment of the present application, the crankshaft pulley is connected to the crankshaft via a crankshaft pulley bolt.

[0038] It can be understood that in the embodiment of the present application, the crankshaft pulley is connected to the crankshaft via a crankshaft pulley bolt, ensuring that the rotation of the crankshaft can be effectively transmitted to the transmission system.

[0039] According to the engine crankshaft movement measurement device proposed in the embodiment of the present application, a measuring plane is set at the front end of the engine crankshaft pulley, and at least one eddy current displacement sensor is set on the measuring plane to measure the displacement data between the eddy current displacement sensor and the front end surface of the crankshaft pulley. The output displacement data is collected by a data acquisition system, and the engine crankshaft movement data is determined based on the displacement data. The engine crankshaft movement data is accurately obtained, and the crankshaft movement data of the engine when operating in different operating conditions can be monitored without disassembling the engine. The measured data is clear and intuitive, which improves the measurement efficiency.

[0040] The engine crankshaft movement measurement device proposed in the embodiment of the present application is further described below through a specific embodiment. Figure 2 As shown, it includes an eddy current displacement sensor 1, an eddy current displacement sensor 2, a test auxiliary tool plate 3, bolts 4, bolts 5, an engine front cover 6, a crankshaft pulley 7, a crankshaft pulley bolt 8, and a crankshaft 9.

[0041] Specifically, the eddy current sensor 1 and the eddy current sensor 2 are assembled on the test auxiliary tool plate 3, and then the test auxiliary tool plate 3 is fixed on the engine front cover 6 by bolts 4 and bolts 5. The eddy current displacement sensor 1 and the eddy current displacement sensor 2 are located at the front end of the crankshaft pulley 7. The distance between the sensor and the crankshaft is adjusted according to the range of the displacement sensor. The crankshaft pulley 7 is connected to the crankshaft 9 by the crankshaft pulley bolt 8. The eddy current displacement sensor uses the eddy current effect. When the metal object to be measured approaches or moves away from the sensor, according to Faraday's law of electromagnetic induction, the metal object to be measured will excite eddy currents. This eddy current closes itself on the metal surface and generates an eddy current magnetic field in the opposite direction to the magnetic field of the sensor coil. At this time, the magnetic field of the sensor coil is affected to produce an impedance change, causing the oscillation voltage amplitude of the oscillation circuit to change. The voltage change signal is finally converted into a voltage or current signal output after detection and amplification processing, thereby realizing the measurement of the axial movement of the crankshaft pulley 7, that is, the engine crankshaft movement.

[0042] A specific application scenario of this embodiment is described below. Specifically: when it is necessary to conduct a crankshaft motion measurement test for excessive wear or fracture of the engine thrust plate, and to investigate whether the wear or fracture is caused by abnormal motion state caused by excessive crankshaft motion, the eddy current displacement sensor measurement device is installed at the front end of the crankshaft pulley, and the plane of the test auxiliary plate is kept parallel to the end face of the crankshaft pulley, and the signal output end of the eddy current displacement sensor is connected to the data acquisition system. First, the sensor is calibrated to determine the linear relationship between the output signal and the measured distance. After the calibration is completed, the test can be started, the engine external characteristic curve is recorded, and the crankshaft motion data is synchronously analyzed with the engine speed, torque, and power curves to determine the true cause of excessive wear or fracture of the engine thrust plate.

[0043] An embodiment of the present application also provides a vehicle, which includes: an engine; and the above-mentioned engine crankshaft movement measurement device, wherein the measurement device is arranged at the front end of the engine.

[0044] The following describes an engine crankshaft sway measurement method proposed in accordance with an embodiment of the present application with reference to the accompanying drawings. The method performs measurement based on the above-mentioned engine crankshaft sway measurement device.

[0045] Figure 3 is a flow chart of the method for measuring the crankshaft movement of an engine provided in an embodiment of the present application, such as Figure 3 As shown, the method for measuring the engine crankshaft movement comprises the following steps:

[0046] In step S201, displacement data output by at least one eddy current displacement sensor is collected.

[0047] Among them, the displacement data is collected through the data acquisition system.

[0048] It is understandable that the embodiment of the present application can collect displacement data output by the eddy current displacement sensor through the data acquisition system, collect displacement data output by at least one eddy current displacement sensor

[0049] In step S202, the crankshaft movement data of the engine is determined according to the displacement data.

[0050] Among them, the method of determining the crankshaft movement data of the engine based on the displacement data is to obtain a correspondence table between the displacement data and the crankshaft movement data which is pre-compiled based on the actual test data through the data acquisition system, and determine the crankshaft movement data corresponding to the displacement data through the correspondence in the table.

[0051] It can be understood that the embodiments of the present application can determine the crankshaft movement data corresponding to the displacement data through the correspondence table between the displacement data and the crankshaft movement data according to the data acquisition system through the correspondence in the table.

[0052] In an embodiment of the present application, after determining the crankshaft movement data of the engine according to the displacement data, it also includes: obtaining the engine external characteristic curve; based on the crankshaft movement data and the engine external characteristic curve, analyzing and determining the wear or breakage of the thrust plate of the engine.

[0053] Among them, the external characteristic curve of the engine refers to the curve of the maximum torque or power output of the engine at different speeds; the thrust plate of the engine is a part used inside the engine, mainly used to withstand axial force.

[0054] It can be understood that after determining the crankshaft movement data of the engine according to the displacement data, the embodiment of the present application analyzes and determines whether the thrust plate of the engine is worn or broken through the external characteristic curve of the engine and the obtained crankshaft movement data. The determination method may be to compare the crankshaft movement data with the axial clearance of the crankshaft. Normally, the crankshaft movement data should be less than or equal to the axial clearance of the crankshaft. If the crankshaft movement data is greater than the axial clearance of the crankshaft, it means that the thrust plate of the engine is worn or broken, and the engine needs to be disassembled for further inspection and determination.

[0055] It should be noted that the aforementioned explanation of the embodiment of the engine crankshaft sway measurement device is also applicable to the engine crankshaft sway measurement method of this embodiment, and will not be repeated here.

[0056] According to the engine crankshaft movement measurement method proposed in the embodiment of the present application, based on the engine crankshaft movement measurement device, the displacement data output by at least one eddy current displacement sensor can be collected, and the engine crankshaft movement data can be determined according to the displacement data, thereby accurately obtaining the engine crankshaft movement data. It is possible to monitor the crankshaft movement of the engine when it is running in different operating conditions without disassembling the engine. The measured data is clear and intuitive, thereby improving the measurement efficiency.

[0057] Figure 4 A schematic diagram of the structure of a data acquisition system provided in an embodiment of the present application. The data acquisition system may include:

[0058] Memory 401 , processor 402 , and a computer program stored in the memory 401 and executable on the processor 402 .

[0059] When the processor 402 executes the program, the engine crankshaft movement measurement method provided in the above embodiment is implemented.

[0060] Furthermore, the data acquisition system also includes:

[0061] The communication interface 403 is used for communication between the memory 401 and the processor 402 .

[0062] The memory 401 is used to store computer programs that can be executed on the processor 402 .

[0063] The memory 401 may include a high-speed RAM (Random Access Memory) memory, and may also include a non-volatile memory, such as at least one disk memory.

[0064] If the memory 401, the processor 402 and the communication interface 403 are implemented independently, the communication interface 403, the memory 401 and the processor 402 can be connected to each other through a bus and communicate with each other. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 4 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0065] Optionally, in a specific implementation, if the memory 401, the processor 402 and the communication interface 403 are integrated on a chip, the memory 401, the processor 402 and the communication interface 403 can communicate with each other through an internal interface.

[0066] The processor 402 may be a CPU (Central Processing Unit), or an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present application.

[0067] An embodiment of the present application also provides a computer-readable storage medium on which a computer program or instruction is stored. When the computer program or instruction is executed, the above-mentioned method for measuring the engine crankshaft movement is implemented.

[0068] An embodiment of the present application also provides a computer program product, including a computer program or instructions, which, when executed, implements the above-mentioned method for measuring the engine crankshaft movement.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 application. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0070] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0071] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0072] It should be understood that the various parts of the present application can be implemented in hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, the steps or methods can be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array, a field programmable gate array, etc.

[0073] A person of ordinary skill in the art may understand that all or part of the steps carried by the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the above-mentioned program may be stored in a computer-readable storage medium, which, when executed, includes one of the steps of the method embodiment or a combination thereof.

[0074] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An engine crankshaft movement measuring device, characterized in that: include: A measuring plane disposed at a front end of a crankshaft pulley of an engine, wherein the measuring plane is parallel to a front end surface of the crankshaft pulley and is disposed in a non-contact manner; at least one eddy current displacement sensor disposed on the measuring plane, measuring displacement data between the eddy current displacement sensor and the front end face of the crankshaft pulley based on the eddy current effect between the eddy current displacement sensor and the front end face of the crankshaft pulley; The data acquisition system is used to acquire displacement data output by the at least one eddy current displacement sensor, and determine crankshaft movement data of the engine according to the displacement data.

2. The engine crankshaft movement measuring device according to claim 1, characterized in that: The data acquisition system is also used for: Obtaining a correspondence table between the displacement data and the crankshaft movement data; The crankshaft movement data corresponding to the displacement data is determined according to the corresponding relationship table.

3. The engine crankshaft movement measuring device according to claim 1, characterized in that: The measuring plane is fixed on the engine front cover by fixing bolts.

4. The engine crankshaft movement measuring device according to claim 1, characterized in that: The crankshaft pulley is connected to the crankshaft via a crankshaft pulley bolt.

5. A vehicle, characterized in that: include: engine; The engine crankshaft movement measuring device according to any one of claims 1 to 4, wherein the measuring device is arranged at the front end of the engine.

6. A method for measuring the amount of engine crankshaft movement, characterized in that: The method is based on the engine crankshaft movement measurement device according to any one of claims 1 to 4, wherein the method comprises the following steps: Collecting displacement data output by the at least one eddy current displacement sensor; The crankshaft movement data of the engine is determined according to the displacement data.

7. The method for measuring engine crankshaft movement according to claim 6, characterized in that: After determining the crankshaft movement data of the engine according to the displacement data, the method further includes: Obtaining engine external characteristic curve; Based on the crankshaft movement data and the engine external characteristic curve, the wear or breakage of the thrust plate of the engine is analyzed.

8. A data acquisition system, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method for measuring the engine crankshaft movement amount as described in claim 6 or 7.

9. A computer-readable storage medium having a computer program or instruction stored thereon, characterized in that: When the computer program or instruction is executed, the method for measuring the engine crankshaft movement amount described in claim 6 or 7 is implemented.

10. A computer program product comprising a computer program or instructions, characterized in that When the computer program or instruction is executed, the method for measuring the engine crankshaft movement amount described in claim 6 or 7 is implemented.

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