Methods, apparatus, equipment and media for position analysis of variable valve timing systems
By acquiring and analyzing crankshaft and camshaft sensor signals during cold engine testing, the problems of poor target wheel size accuracy and camshaft position sensor failure were solved, enabling accurate detection of the position status of the variable valve timing system and ensuring engine safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA FAW CO LTD
- Filing Date
- 2023-06-28
- Publication Date
- 2026-06-30
Smart Images
Figure CN116793688B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of signal processing technology, and in particular to a method, apparatus, device and medium for position analysis of a variable valve timing system. Background Technology
[0002] With the development of the automotive industry, variable valve timing systems, as a technology to improve engine power and economy, have a very important application in today's automotive industry.
[0003] The electronic control unit (ECU) reads the target wheel signal on the camshaft through the camshaft position sensor to identify the position of the variable valve timing system, thereby facilitating the ECU to position and control the variable valve timing system. Therefore, the camshaft signal read through the target wheel is very important.
[0004] However, if there are issues such as poor target wheel size accuracy or camshaft position sensor malfunction, the electronic controller unit will be unable to read the position of the variable valve timing system, leading to control failure and affecting the normal operation of the engine. Summary of the Invention
[0005] This invention provides a method, apparatus, device, and medium for analyzing the position of a variable valve timing system, which can analyze the position signal of the variable valve timing system.
[0006] In a first aspect, embodiments of the present invention provide a method for position analysis of a variable valve timing system, the method comprising:
[0007] Acquire the sensor signals of the crankshaft position sensor and camshaft position sensor of the preset engine during the cold engine test;
[0008] Based on sensor signal analysis, the real-time position information of the variable valve timing system of the engine is preset;
[0009] The position status of the variable valve timing system is determined based on real-time position information and preset standard reference position information.
[0010] Secondly, embodiments of the present invention also provide a variable valve timing system position analysis device, the device comprising:
[0011] The signal acquisition module is used to acquire the sensor signals of the crankshaft position sensor and camshaft position sensor of the preset engine during the cold engine test process;
[0012] The position determination module is used to analyze the real-time position information of the preset engine's variable valve timing system based on sensor signals;
[0013] The position analysis module is used to determine the position status of the variable valve timing system based on real-time position information and preset standard reference position information.
[0014] Thirdly, embodiments of the present invention also provide a computer device, the computer device comprising:
[0015] One or more processors;
[0016] Memory, used to store one or more programs;
[0017] When the one or more programs are executed by the one or more processors, the one or more processors implement the variable valve timing system position analysis method provided in any embodiment of the present invention.
[0018] Fourthly, embodiments of the present invention also provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the variable valve timing system position analysis method as provided in any embodiment of the present invention.
[0019] The technical solution of this embodiment acquires the sensor signals of the crankshaft position sensor and camshaft position sensor of a preset engine during cold engine testing. By acquiring the crankshaft and camshaft position signals, it determines whether the crankshaft and camshaft position signals meet the preset normal signal state, ensuring the accuracy of subsequent analysis. Based on the sensor signal analysis, it analyzes the real-time position information of the variable valve timing system of the preset engine, and determines the position state of the variable valve timing system according to the real-time position information and the preset standard reference position information. This technical solution realizes the position signal analysis of the variable valve timing system. By detecting the position of the variable valve timing system by acquiring crankshaft and camshaft signals during cold engine testing, it determines the position state of the variable valve timing system, solving problems such as poor target wheel dimensional accuracy and camshaft position sensor failure before engine hot testing, and ensuring the safety of the prototype. Attached Figure Description
[0020] Figure 1 A flowchart of a position analysis method for a variable valve timing system provided in an embodiment of the present invention;
[0021] Figure 2 A flowchart of a position analysis method for a variable valve timing system provided in an embodiment of the present invention;
[0022] Figure 3 A flowchart of a position analysis method for a variable valve timing system provided in an embodiment of the present invention;
[0023] Figure 4This is a signal diagram of a variable valve timing system position analysis method provided in an embodiment of the present invention;
[0024] Figure 5 This is a schematic diagram of the structure of a variable valve timing system position analysis device provided in an embodiment of the present invention;
[0025] Figure 6 This is a schematic diagram of the structure of a computer device provided in an embodiment of the present invention. Detailed Implementation
[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.
[0027] Example 1
[0028] Figure 1 This is a flowchart illustrating a method for analyzing the position of a variable valve timing system according to an embodiment of the present invention. This embodiment is applicable to scenarios involving the analysis of the position of a variable valve timing system. The method can be executed by a variable valve timing system position analysis device, which can be implemented in software and / or hardware and integrated into a computer device with application development capabilities.
[0029] like Figure 1 As shown, the variable valve timing system position analysis method of this embodiment includes the following steps:
[0030] S110: Acquire the sensor signals of the crankshaft position sensor and camshaft position sensor of the preset engine during the cold engine test.
[0031] The preset engine can be an engine that is undergoing cold engine testing.
[0032] Specifically, during the engine cold start test phase, the variable valve timing system position analysis device is connected to a preset engine, and sensor signals from the crankshaft position sensor and camshaft position sensor on the preset engine are acquired through the connecting wires on the variable valve timing system position analysis device.
[0033] S120: Based on sensor signal analysis, preset the real-time position information of the engine's variable valve timing system.
[0034] Among them, the real-time location information can be the real-time intake phase and exhaust phase of the engine's variable valve timing system preset during the cold engine testing phase.
[0035] Specifically, the variable valve timing system position analysis device obtains the real-time position information of the variable valve timing system by acquiring sensor signals from the pre-set crankshaft position sensor and camshaft position sensor on the engine, and calculating the crankshaft angle difference between a specific position of the crankshaft position sensor signal and a specific position of the camshaft position sensor signal. The specific position of the crankshaft position sensor signal is typically the second sensor signal after the initial no-signal appears in the crankshaft position sensor signal, and the specific position of the camshaft position sensor signal is typically the sensor signal at the moment the peak first disappears in the camshaft position sensor signal.
[0036] S130. Determine the position status of the variable valve timing system based on real-time position information and preset standard reference position information.
[0037] The preset standard reference position information can be the position information range of the variable valve timing system of the engine that conforms to the standard, set by the test personnel before the cold engine test stage.
[0038] Specifically, the variable valve timing system position analysis device can determine the position status of the variable valve timing system by comparing real-time position information with preset standard reference position information. If the real-time position information meets the preset standard reference position information, the position status of the variable valve timing system is normal. If the real-time position information does not meet the preset standard reference position information, the position status of the variable valve timing system is abnormal. The position status of the engine's variable valve timing system is recorded and stored in the variable valve timing system position analysis device.
[0039] The technical solution of this embodiment acquires the sensor signals from the crankshaft position sensor and camshaft position sensor of a preset engine during cold engine testing. Based on the sensor signals, it analyzes the real-time position information of the variable valve timing system of the preset engine, and determines the position state of the variable valve timing system according to the real-time position information and the preset standard reference position information. This technical solution realizes the position signal analysis of the variable valve timing system. By collecting crankshaft and camshaft signals during cold engine testing, it detects the position of the variable valve timing system and determines its position state. This solves problems such as poor target wheel dimensional accuracy and camshaft position sensor failure before engine hot testing, ensuring the safety of the prototype.
[0040] Example 2
[0041] Figure 2This is a flowchart illustrating a variable valve timing system position analysis method provided in this embodiment of the invention. This embodiment belongs to the same inventive concept as the variable valve timing system position analysis method in the previous embodiments, and further describes the adjustment process of the variable valve timing system position analysis strategy. Specific implementation details can be found in the description of this embodiment. Technical features that are the same as or similar to those in the previous embodiments will not be repeated here. Figure 2 As shown, the variable valve timing system position analysis method of this embodiment includes the following steps:
[0042] S210: Acquire the crankshaft position sensor signal, intake camshaft position sensor signal, and exhaust camshaft position sensor signal of the preset engine.
[0043] Among them, the crankshaft position sensor signal, the intake camshaft position sensor signal, and the exhaust camshaft position sensor signal are sensor signals emitted by the crankshaft position sensor, the intake camshaft position sensor, and the exhaust camshaft position sensor, respectively.
[0044] Specifically, during the engine cold start test phase, the variable valve timing system position analysis device is connected to a preset engine, and the crankshaft position sensor signal, intake camshaft position sensor signal, and exhaust camshaft position sensor signal on the preset engine are obtained through the connecting wires on the variable valve timing system position analysis device.
[0045] S220: The crankshaft position sensor signal, intake camshaft position sensor signal, and exhaust camshaft position sensor signal are amplified and processed. The intake phase is determined based on the amplified crankshaft position sensor signal and the amplified intake camshaft position sensor signal. The exhaust phase is determined based on the amplified crankshaft position sensor signal and the amplified exhaust camshaft position sensor signal.
[0046] Specifically, the variable valve timing system position analysis device amplifies the acquired crankshaft position sensor signal, intake camshaft position sensor signal, and exhaust camshaft position sensor signal to maintain the clarity and accuracy of the sensor signals. It calculates the crankshaft angle difference between the amplified crankshaft position sensor signal and the amplified intake camshaft position sensor signal to determine the intake phase, and calculates the crankshaft angle difference between the amplified crankshaft position sensor signal and the amplified exhaust camshaft position sensor signal to determine the exhaust phase. The obtained intake and exhaust phases provide the position information of the variable valve timing system.
[0047] S230. By comparing the intake phase and exhaust phase with the preset standard reference position information, determine whether the position status of the variable valve timing system is normal.
[0048] Specifically, the intake and exhaust phases are compared with the reference position data and allowable deviation range of the preset standard reference position information. If the intake and exhaust phases are within the allowable deviation range, the position status of the variable valve timing system is normal; if the intake and exhaust phases are outside the allowable deviation range, the position status of the variable valve timing system is abnormal. The position status of the engine's variable valve timing system is recorded and stored in the variable valve timing system position analysis device.
[0049] The technical solution of this embodiment acquires the crankshaft position sensor signal, intake camshaft position sensor signal, and exhaust camshaft position sensor signal of a preset engine. These signals are then amplified. The intake phase and exhaust phase are determined based on the amplified crankshaft and intake camshaft position sensor signals, respectively. The intake and exhaust phases are compared with preset standard reference position information to determine whether the position state of the variable valve timing system is normal. This embodiment achieves position signal analysis of the variable valve timing system. By detecting the position of the variable valve timing system through the acquired crankshaft and camshaft signals during cold engine testing, the position state of the variable valve timing system is determined. This solves problems such as poor target wheel dimensional accuracy and camshaft position sensor malfunction before engine hot testing, ensuring the safety of the prototype.
[0050] Example 3
[0051] Figure 3 This is a flowchart illustrating a variable valve timing system position analysis method provided in this embodiment of the invention. This embodiment belongs to the same inventive concept as the variable valve timing system position analysis method in the above embodiments, and further describes the adjustment process of the variable valve timing system position analysis strategy. Specific implementation details can be found in the description of this embodiment. Technical features that are the same as or similar to those in the foregoing embodiments will not be repeated here.
[0052] like Figure 3 As shown, the variable valve timing system position analysis method of this embodiment includes the following steps:
[0053] S310: Acquire the crankshaft position sensor signal, intake camshaft position sensor signal, and exhaust camshaft position sensor signal of the preset engine.
[0054] S320 amplifies the signals from the crankshaft position sensor, intake camshaft position sensor, and exhaust camshaft position sensor.
[0055] S330. Identify a first target signal with a first preset signal characteristic in the crankshaft position sensor signal, and identify a second target signal with a second preset signal characteristic in the intake camshaft position sensor signal that is associated with the first target signal. Calculate the phase difference between the first target signal and the second target signal as the intake phase.
[0056] The first preset signal can be the second sensor signal after the absence of an empty signal from the sensor signal emitted by the crankshaft position sensor. The first target signal can be the sensor signal that satisfies the first preset signal from the sensor signal emitted by the crankshaft position sensor. The second preset signal can be the sensor signal when the peak of the wave first disappears from the sensor signal emitted by the intake camshaft position sensor. The second target signal can be the sensor signal that satisfies the second preset signal from the sensor signal emitted by the intake camshaft position sensor.
[0057] Specifically, the variable valve timing system position analysis device calculates the crankshaft angle difference between a first target signal with a first preset signal characteristic from the crankshaft position sensor signal and a second target signal with a second preset signal characteristic from the intake camshaft position sensor signal, which is associated with the first target signal. This yields the intake phase of the variable valve timing system. Figure 4 .
[0058] S340: Identify the third target signal in the exhaust camshaft position sensor signal that is associated with the first target signal and has the characteristics of a third preset signal, and calculate the phase difference between the first target signal and the third target signal as the exhaust phase.
[0059] The third preset signal can be the sensor signal from the exhaust camshaft position sensor when the peak first disappears, and the third target signal can be the sensor signal from the exhaust camshaft position sensor that satisfies the second preset signal.
[0060] Specifically, the variable valve timing system position analysis device calculates the crankshaft angle difference between a first target signal with a first preset signal characteristic from the crankshaft position sensor signal and a third target signal with a third preset signal characteristic from the exhaust camshaft position sensor signal that is associated with the first target signal, to obtain the exhaust phase of the variable valve timing system, such as... Figure 4 .
[0061] S350: By comparing the intake and exhaust phases with preset standard reference position information, determine whether the position status of the variable valve timing system is normal.
[0062] S360: Obtain the identification information of the preset engine, and establish the association between the location status and the preset engine based on the identification information.
[0063] The engine identification information can be the engine number.
[0064] Specifically, the engine number on the preset engine can be obtained through the barcode scanner on the variable valve timing system position analyzer. The position status of the variable valve timing system of the preset engine and the corresponding engine number are stored together in the variable valve timing system position analyzer for later retrieval. The barcode scanner can be a barcode scanner.
[0065] The technical solution of this embodiment acquires the crankshaft position sensor signal, intake camshaft position sensor signal, and exhaust camshaft position sensor signal of a preset engine. It then amplifies these signals, identifies a first target signal with a first preset signal characteristic in the crankshaft position sensor signal, and identifies a second target signal in the intake camshaft position sensor signal that is associated with the first target signal and has a second preset signal characteristic. The phase difference between the first and second target signals is calculated as the intake phase. Similarly, a third target signal in the exhaust camshaft position sensor signal that is associated with the first target signal and has a third preset signal characteristic is identified, and the phase difference between the first and third target signals is calculated as the exhaust phase. The position state of the variable valve timing system is determined based on real-time position information and preset standard reference position information. Finally, the identification information of the preset engine is acquired, and a correlation between the position state and the preset engine is established based on the identification information. The technical solution of this embodiment realizes the position signal analysis of the variable valve timing system. By collecting crankshaft and camshaft signals during cold engine testing, the position of the variable valve timing system is detected, and the position status of the variable valve timing system is determined. This solves the problems of poor target wheel size accuracy and camshaft position sensor failure before engine hot testing, and ensures the safety of the prototype.
[0066] Example 4
[0067] Figure 5 This is a schematic diagram of the structure of a variable valve timing system position analysis device provided in an embodiment of the present invention, as shown below. Figure 5 As shown, the variable valve timing system position analysis device includes: a signal acquisition module 410, a position determination module 420, and a position analysis module 430.
[0068] The signal acquisition module 410 is used to acquire the sensor signals of the crankshaft position sensor and camshaft position sensor of the preset engine during the cold engine test process; the position determination module 420 is used to analyze the real-time position information of the variable valve timing system of the preset engine based on the sensor signals; and the position analysis module 430 is used to determine the position state of the variable valve timing system based on the real-time position information and the preset standard reference position information.
[0069] The technical solution of this invention acquires sensor signals from the crankshaft position sensor and camshaft position sensor of a preset engine during cold engine testing. Based on the sensor signals, it analyzes the real-time position information of the variable valve timing system of the preset engine and determines the position state of the variable valve timing system according to the real-time position information and the preset standard reference position information. This embodiment, through the cooperation of various modules, achieves position signal analysis of the variable valve timing system. By detecting the position of the variable valve timing system by acquiring crankshaft and camshaft signals during cold engine testing, it determines the position state of the variable valve timing system, solving problems such as poor target wheel dimensional accuracy and camshaft position sensor failure before engine hot testing, thus ensuring the safety of the prototype.
[0070] Based on the above technical solutions, optionally, the signal acquisition module 410 is specifically used for:
[0071] Acquire the crankshaft position sensor signal, intake camshaft position sensor signal, and exhaust camshaft position sensor signal of the preset engine.
[0072] Based on the above technical solutions, optionally, the position determination module 420 is specifically used for:
[0073] The crankshaft position sensor signal, intake camshaft position sensor signal, and exhaust camshaft position sensor signal are amplified and processed.
[0074] The intake phase is determined based on the amplified crankshaft position sensor signal and the amplified intake camshaft position sensor signal;
[0075] The exhaust phase is determined based on the amplified crankshaft position sensor signal and the amplified exhaust camshaft position sensor signal.
[0076] Based on the above technical solutions, optionally, the position determination module 420 can be further used for:
[0077] Identify a first target signal with a first preset signal characteristic in the crankshaft position sensor signal, and identify a second target signal with a second preset signal characteristic in the intake camshaft position sensor signal that is associated with the first target signal;
[0078] Calculate the phase difference between the first target signal and the second target signal, and use it as the intake phase.
[0079] Based on the above technical solutions, optionally, the position determination module 420 can be further used for:
[0080] Identify a third target signal from the exhaust camshaft position sensor signals that is associated with the first target signal and has the characteristics of a third preset signal;
[0081] Calculate the phase difference between the first target signal and the third target signal, and use it as the exhaust phase.
[0082] Based on the above technical solutions, optionally, the position analysis module 430 is specifically used for:
[0083] By comparing the intake and exhaust phases with preset standard reference position information, it is determined whether the position status of the variable valve timing system is normal.
[0084] Based on the above technical solutions, an optional variable valve timing system position analysis device, including an engine indication recognition module, is specifically used for:
[0085] Obtain the identification information of the preset engine, and establish the association between the location status and the preset engine based on the identification information.
[0086] The variable valve timing system position analysis device provided in this embodiment of the invention can execute the variable valve timing system position analysis method provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the method execution.
[0087] Example 5
[0088] Figure 6 This is a schematic diagram of the structure of a computer device provided in an embodiment of the present invention. Figure 6 A block diagram of an exemplary computer device 12 suitable for implementing embodiments of the present invention is shown. Figure 6 The computer device 12 shown is merely an example and should not be construed as limiting the functionality or scope of the embodiments of the present invention. The computer device 12 can be any terminal device with computing capabilities, such as intelligent controllers and servers, mobile phones, and other terminal devices.
[0089] like Figure 6 As shown, the computer device 12 is represented in the form of a general-purpose computing device. The components of the computer device 12 may include, but are not limited to: one or more processors or processing units 16, system memory 28, and a bus 18 connecting different system components (including system memory 28 and processing unit 16).
[0090] Bus 18 represents one or more of several bus architectures, including a memory bus or memory controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus using any of the various bus architectures. For example, these architectures include, but are not limited to, the Industry Standard Architecture (ISA) bus, the Micro Channel Architecture (MAC) bus, the Enhanced ISA bus, the Video Electronics Standards Association (VESA) local bus, and the Peripheral Component Interconnect (PCI) bus.
[0091] Computer device 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by computer device 12, including volatile and non-volatile media, removable and non-removable media.
[0092] System memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. Computer device 12 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, storage system 34 may be used to read and write non-removable, non-volatile magnetic media (…). Figure 6 Not shown; usually referred to as a "hard drive"). Although Figure 6 Not shown, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk") and an optical disk drive for reading and writing to a removable non-volatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to bus 18 via one or more data media interfaces. System memory 28 may include at least one program product having a set (e.g., at least one) of program modules configured to perform the functions of the embodiments of the present invention.
[0093] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in system memory 28. Such program modules 42 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data. Each or some combination of these examples may include an implementation of a network environment. Program modules 42 typically perform the functions and / or methods described in the embodiments of the present invention.
[0094] Computer device 12 can also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), and with one or more devices that enable a user to interact with the computer device 12, and / or with any device that enables the computer device 12 to communicate with one or more other computing devices (e.g., network card, modem, etc.). This communication can be performed via input / output (I / O) interface 22. Furthermore, computer device 12 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via network adapter 20. As shown, network adapter 20 communicates with other modules of computer device 12 via bus 18. It should be understood that, although... Figure 6 As not shown, it can be used in conjunction with computer device 12 with other hardware and / or software modules, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.
[0095] Processing unit 16 executes various functional applications and data processing by running programs stored in system memory 28, such as implementing the variable valve timing system position analysis method provided in this embodiment, which includes:
[0096] Acquire the sensor signals of the crankshaft position sensor and camshaft position sensor of the preset engine during the cold engine test;
[0097] Based on sensor signal analysis, the real-time position information of the variable valve timing system of the engine is preset;
[0098] The position status of the variable valve timing system is determined based on real-time position information and preset standard reference position information.
[0099] This invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the variable valve timing system position analysis method provided in any embodiment of this invention. The method includes:
[0100] Acquire the sensor signals of the crankshaft position sensor and camshaft position sensor of the preset engine during the cold engine test;
[0101] Based on sensor signal analysis, the real-time position information of the variable valve timing system of the engine is preset;
[0102] The position status of the variable valve timing system is determined based on real-time position information and preset standard reference position information.
[0103] The computer storage medium of this invention can be any combination of one or more computer-readable media. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. For example, a computer-readable storage medium can be, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.
[0104] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, capable of sending, propagating, or transmitting programs for use by or in connection with an instruction execution system, apparatus, or device.
[0105] Program code contained on a computer-readable medium may be transmitted using any suitable medium, including but not limited to: wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.
[0106] Computer program code for performing the operations of this invention can be written in one or more programming languages or a combination thereof, including object-oriented programming languages such as Java, Smalltalk, and C++, as well as conventional procedural programming languages such as C or similar languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (e.g., via the Internet using an Internet service provider).
[0107] Those skilled in the art will understand that the modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. Optionally, they can be implemented using computer-executable program code, thereby allowing them to be stored in a storage device for execution by a computing device, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.
[0108] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.
Claims
1. A method for position analysis of a variable valve timing system, characterized in that, include: Acquire the sensor signals of the crankshaft position sensor and camshaft position sensor of the preset engine during the cold engine test; The preset engine is an engine that is undergoing cold engine testing; The real-time position information of the variable valve timing system of the preset engine is analyzed based on the sensor signals. The position state of the variable valve timing system is determined based on the real-time position information and the preset standard reference position information. The acquisition of sensor signals from the crankshaft position sensor and camshaft position sensor of the preset engine during cold engine testing includes: Acquire the crankshaft position sensor signal, intake camshaft position sensor signal, and exhaust camshaft position sensor signal of the preset engine; The step of analyzing the real-time position information of the preset engine's variable valve timing system based on the sensor signals includes: The crankshaft position sensor signal, the intake camshaft position sensor signal, and the exhaust camshaft position sensor signal are amplified. The intake phase is determined based on the amplified crankshaft position sensor signal and the amplified intake camshaft position sensor signal; The exhaust phase is determined based on the amplified crankshaft position sensor signal and the amplified exhaust camshaft position sensor signal.
2. The method according to claim 1, characterized in that, Determining the position state of the variable valve timing system based on the real-time position information and the preset standard reference position information includes: By comparing the intake phase and the exhaust phase with preset standard reference position information, it is determined whether the position state of the variable valve timing system is normal.
3. The method according to claim 1, characterized in that, The step of determining the intake phase based on the amplified crankshaft position sensor signal and the amplified intake camshaft position sensor signal includes: Identify a first target signal with a first preset signal characteristic in the crankshaft position sensor signal, and identify a second target signal with a second preset signal characteristic in the intake camshaft position sensor signal that is associated with the first target signal; The phase difference between the first target signal and the second target signal is calculated and used as the intake phase.
4. The method according to claim 3, characterized in that, The step of determining the exhaust phase based on the amplified crankshaft position sensor signal and the amplified exhaust camshaft position sensor signal includes: Identify a third target signal from the exhaust camshaft position sensor signals that is associated with the first target signal and has a third preset signal characteristic; The phase difference between the first target signal and the third target signal is calculated and used as the exhaust phase.
5. The method according to any one of claims 1-4, characterized in that, The above includes: Obtain the identification information of the preset engine, and establish the association between the location status and the preset engine based on the identification information.
6. A variable valve timing system position analysis device, used to perform the variable valve timing system position analysis method as described in any one of claims 1-5, characterized in that, include: The signal acquisition module is used to acquire the sensor signals of the crankshaft position sensor and camshaft position sensor of the preset engine during the cold engine test process; The position determination module is used to analyze the real-time position information of the variable valve timing system of the preset engine based on the sensor signals; The position analysis module is used to determine the position state of the variable valve timing system based on the real-time position information and the preset standard reference position information.
7. A computer device, characterized in that, The computer device includes: One or more processors; Memory, used to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the variable valve timing system position analysis method as described in any one of claims 1-5.
8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by the processor, the program implements the variable valve timing system position analysis method as described in any one of claims 1-5.