Engine ignition and injection collection device and method and vehicle

Abstract

The invention provides an engine ignition and injection collection device and method and a vehicle. The device comprises a source signal detection unit, a voltage acquisition unit, an ignition injection acquisition unit and a control unit, the source signal detection unit is electrically connected with the voltage acquisition unit, and the control unit is electrically connected with the source signal detection unit, the voltage acquisition unit and the ignition injection acquisition unit. The voltage acquisition unit is used for acquiring an injection voltage signal or an ignition voltage signal; the control unit is used for inputting the injection voltage signal or the ignition voltage signal to the ignition injection acquisition unit and inputting an engine reference phase signal to the ignition injection acquisition unit, and the ignition injection acquisition unit is used for determining injection characteristic parameters according to the injection voltage signal and the engine reference phase signal. The method is used for determining ignition characteristic parameters according to ignition voltage signals and engine reference phase signals. According to the scheme, the problem that in the prior art, the engine ignition and injection parameter collection efficiency is low is solved.

Description

Technical Field

[0001] The present application relates to the technical field of engine control, and in particular, to a device for collecting engine ignition and injection, a method for collecting engine ignition and injection, a device for collecting engine ignition and injection characteristics, and a vehicle. Background Technique

[0002] In modern engines, the electronic control unit (ECU) plays a core role. The ECU receives signals from multiple sensors (such as speed sensors, crankshaft position sensors, throttle position sensors, etc.), calculates and executes complex control strategies to enable the engine to achieve the best performance, economy, and emission standards under different operating conditions. However, with the increasing complexity of the ECU control logic, the accurate measurement and analysis of engine ignition and injection parameters become more critical.

[0003] Traditional measurement of engine ignition and injection parameters often relies on manual analysis in cooperation with the engine operating state using an external oscilloscope. That is to say, it is necessary to use an oscilloscope to determine the relative position of the waveform and phase to determine the advance angle and power-on time. This method is inefficient, greatly affecting the work progress, and unable to obtain the correct injection advance angle and power-on time as soon as possible, seriously affecting the smooth progress of engine ECU testing. Summary of the Invention

[0004] The main purpose of the present application is to provide a device for collecting engine ignition and injection, a method for collecting engine ignition and injection, a device for collecting engine ignition and injection characteristics, and a vehicle, so as to at least solve the problem of low efficiency in collecting engine ignition and injection parameters in the prior art.

[0005] To achieve the above object, according to one aspect of the present application, a device for engine ignition and injection acquisition is provided, including: a source signal detection unit, a voltage acquisition unit, an ignition injection acquisition unit, and a control unit. The source signal detection unit is electrically connected to the voltage acquisition unit, and the control unit is electrically connected to the source signal detection unit, the voltage acquisition unit, and the ignition injection acquisition unit respectively. The signal detected by the source signal detection unit is a source injection signal or a source ignition signal. The voltage acquisition unit is used to acquire an injection voltage signal or an ignition voltage signal. The control unit is used to input the injection voltage signal or the ignition voltage signal into the ignition injection acquisition unit, and input an engine reference phase signal into the ignition injection acquisition unit. The ignition injection acquisition unit is used to determine injection characteristic parameters according to the injection voltage signal and the engine reference phase signal, and determine ignition characteristic parameters according to the ignition voltage signal and the engine reference phase signal. The injection characteristic parameters include an injection advance angle and an injection power-on time, and the ignition characteristic parameters include an ignition advance angle and an ignition power-on time.

[0006] Optionally, the voltage acquisition unit includes a first relay module, a second relay module, a current-voltage conversion module, and a voltage acquisition module. The fixed end of the first contact of the first relay module is electrically connected to the output end of the source signal detection unit, and the movable end of the first contact is movably connected to the first end of the current-voltage conversion module or the first end of a wire parallel to the current-voltage conversion module. The fixed end of the second contact of the second relay module is connected to the second end of the current-voltage conversion module, and the movable end of the second contact is movably connected to the input end of the voltage acquisition module and the input end of the ignition injection acquisition unit.

[0007] Optionally, the first relay module includes a first relay and a first IO output board. The first relay includes a first coil and the first contact. The input end of the first IO output board is electrically connected to the first signal output end of the control unit, and the output end of the first IO output board is electrically connected to the coil of the first relay. The second relay module includes a second relay and a second IO output board. The second relay includes a second coil and the second contact. The input end of the second IO output board is electrically connected to the second signal output end of the control unit, and the output end of the second IO output board is electrically connected to the coil of the second relay.

[0008] According to another aspect of the present application, a method for engine ignition and injection acquisition is provided. The method for engine ignition and injection acquisition is applied to any one of the devices for engine ignition and injection acquisition, and includes: if the control unit receives a signal as an injection voltage signal from the voltage acquisition unit, inputting the injection voltage signal and the engine reference phase signal into the ignition injection acquisition unit, so that the ignition injection acquisition unit determines injection characteristic parameters according to the injection voltage signal and the engine reference phase signal, where the injection characteristic parameters include injection advance angle and injection power-on time; if the control unit receives a signal as an ignition voltage signal from the voltage acquisition unit, inputting the ignition voltage signal into the ignition injection acquisition unit, and inputting the engine reference phase signal into the ignition injection acquisition unit, so that the ignition injection acquisition unit determines ignition characteristic parameters according to the ignition voltage signal and the engine reference phase signal, where the ignition characteristic parameters include ignition advance angle and ignition power-on time.

[0009] Optionally, the voltage acquisition unit includes a first relay module, a second relay module, and a current-voltage conversion module. The fixed end of the first contact of the first relay module is electrically connected to the output end of the source signal detection unit, and the movable end of the first contact is movably connected to the first end of the current-voltage conversion module or the first end of a wire parallel to the current-voltage conversion module; the fixed end of the second contact of the second relay module is connected to the second end of the current-voltage conversion module, and the movable end of the second contact is movably connected to the input end of the voltage acquisition module and the input end of the ignition injection acquisition unit. The method further includes: if the signal received by the control unit from the source signal detection unit is a source injection signal, the control unit controls the movable end of the first contact of the first relay to be connected to the first end of the current-voltage conversion module, and controls the movable end of the second contact of the second relay module to be movably connected to the input end of the voltage acquisition module, so as to obtain the injection voltage signal; if the signal received by the control unit from the source signal detection unit is a source ignition signal, the control unit controls the movable end of the first contact of the first relay to be connected to the first end of the wire parallel to the current-voltage conversion module, and controls the movable end of the second contact of the second relay module to be movably connected to the input end of the voltage acquisition module, so as to obtain the ignition voltage signal.

[0010] Optionally, the method further includes: the control unit generates the engine reference phase signal according to the expected engine operation parameters, where the engine reference phase signal includes a crankshaft reference phase signal and a camshaft reference phase signal, and the expected engine operation parameters include expected operating speed, expected operating rotation speed, and expected operating power.

[0011] Optionally, if the control unit receives a signal from the voltage acquisition unit as an injection voltage signal, the injection voltage signal and the engine reference phase signal are input into the ignition injection acquisition unit, so that the ignition injection acquisition unit determines injection characteristic parameters according to the injection voltage signal and the engine reference phase signal. The injection characteristic parameters include injection advance angle and injection power-on time, including: if the signal received by the control unit from the voltage acquisition unit is the injection voltage signal, the injection voltage signal and the engine reference phase signal are input into the ignition injection acquisition unit, so that the ignition injection acquisition unit performs a voltage reduction process on the injection voltage signal to obtain a reduced injection voltage signal, determines the injection advance angle according to the relative position of the reduced injection voltage signal and the rising edge and / or falling edge of the engine reference phase signal, and determines the injection power-on time according to the high-level duration of the injection voltage signal.

[0012] Optionally, the amplitude of the reduced injection voltage signal is 20% of the amplitude of the injection voltage signal.

[0013] Optionally, after the movable end of the second contact of the second relay module is movably connected to the input end of the voltage acquisition module, the method further includes: after the control unit controls the connection duration between the movable end of the second contact of the second relay module and the input end of the voltage acquisition module to reach a preset duration, controlling the movable end of the second contact of the second relay module to be connected to the input end of the ignition injection acquisition unit.

[0014] According to another aspect of the present application, an engine ignition and injection characteristic acquisition device is provided, including a first control unit and a second control unit. Among them, the first control unit is used to input the injection voltage signal and the engine reference phase signal into the ignition injection acquisition unit if the control unit receives a signal from the voltage acquisition unit as an injection voltage signal, so that the ignition injection acquisition unit determines injection characteristic parameters according to the injection voltage signal and the engine reference phase signal. The injection characteristic parameters include injection advance angle and injection power-on time; the second control unit is used to input the ignition voltage signal into the ignition injection acquisition unit and input the engine reference phase signal into the ignition injection acquisition unit if the control unit receives a signal from the voltage acquisition unit as an ignition voltage signal, so that the ignition injection acquisition unit determines ignition characteristic parameters according to the ignition voltage signal and the engine reference phase signal. The ignition characteristic parameters include ignition advance angle and ignition power-on time.

[0015] According to yet another aspect of the present application, a vehicle is provided, including an engine and any one of the engine ignition and injection acquisition devices.

[0016] Applying the technical solution of the present application, the device for engine ignition and injection acquisition includes a source signal detection unit, a voltage acquisition unit, an ignition injection acquisition unit, and a control unit. The source signal detection unit is electrically connected to the voltage acquisition unit, and the control unit is electrically connected to the source signal detection unit, the voltage acquisition unit, and the ignition injection acquisition unit respectively. The signal detected by the source signal detection unit is a source injection signal or a source ignition signal. The voltage acquisition unit is used to acquire an injection voltage signal or an ignition voltage signal; the control unit is used to input the injection voltage signal or the ignition voltage signal into the ignition injection acquisition unit, and input the engine reference phase signal into the ignition injection acquisition unit. The ignition injection acquisition unit is used to determine injection characteristic parameters according to the injection voltage signal and the engine reference phase signal, and determine ignition characteristic parameters according to the ignition voltage signal and the engine reference phase signal. The injection characteristic parameters include injection advance angle and injection power-on time, and the ignition characteristic parameters include ignition advance angle and ignition power-on time. This solution shortens the parameter acquisition time, improves the test accuracy and efficiency, and thus solves the problem of low efficiency in engine ignition and injection parameter acquisition in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings forming a part of this application are used to provide a further understanding of the application. The schematic embodiments and descriptions thereof of the application are used to explain the application and do not constitute an improper limitation to the application. In the drawings:

[0018] Figure 1 Shows a schematic structural diagram of a device for performing engine ignition and injection acquisition according to an embodiment of the present application;

[0019] Figure 2 Shows a schematic flow diagram of a method for engine ignition and injection acquisition according to an embodiment of the present application;

[0020] Figure 3 Shows a schematic diagram of the principle of a method for engine ignition and injection acquisition according to an embodiment of the present application;

[0021] Figure 4 Shows a flow chart of a specific method for engine ignition and injection acquisition according to an embodiment of the present application;

[0022] Figure 5 Shows a structural block diagram of a device for engine ignition and injection characteristic acquisition according to an embodiment of the present application.

[0023] Among them, the above-mentioned accompanying drawings include the following reference numerals:

[0024] 01. Device for collecting engine ignition and injection; 10. Source signal detection unit; 20. Voltage collection unit; 30. Ignition injection collection unit; 40. Control unit. Detailed implementation manner

[0025] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The following will describe the present application in detail with reference to the drawings and in combination with the embodiments.

[0026] In order to enable those skilled in the art of the present technology to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0027] It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances for the embodiments of the present application described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0028] As introduced in the background art, in the prior art, an oscilloscope is used to determine the relative position of the waveform and the phase to determine the advance angle and the power-on time. This method is inefficient and cannot obtain the correct injection advance angle and power-on time as soon as possible, seriously affecting the smooth progress of the engine ECU test. To solve the problem of low efficiency in collecting engine ignition and injection parameters in the prior art, the embodiments of the present application provide a device for collecting engine ignition and injection, a method for collecting engine ignition and injection, a device for collecting engine ignition and injection characteristics, and a vehicle.

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention.

[0030] Such as Figure 1As shown in the figure, the device 01 for collecting engine ignition and injection of this embodiment includes a source signal detection unit 10, a voltage acquisition unit 20, an ignition injection acquisition unit 30, and a control unit 40. The above-mentioned source signal detection unit 10 is electrically connected to the above-mentioned voltage acquisition unit 20. The above-mentioned control unit 40 is respectively electrically connected to the above-mentioned source signal detection unit 10, the above-mentioned voltage acquisition unit 20, and the above-mentioned ignition injection acquisition unit 30. The signal detected by the above-mentioned source signal detection unit is a source injection signal or a source ignition signal. The above-mentioned voltage acquisition unit is used to collect an injection voltage signal or an ignition voltage signal. The above-mentioned control unit is used to input the above-mentioned injection voltage signal or the above-mentioned ignition voltage signal into the above-mentioned ignition injection acquisition unit, and input an engine reference phase signal into the above-mentioned ignition injection acquisition unit. The above-mentioned ignition injection acquisition unit is used to determine injection characteristic parameters according to the above-mentioned injection voltage signal and the above-mentioned engine reference phase signal, and is used to determine ignition characteristic parameters according to the above-mentioned ignition voltage signal and the above-mentioned engine reference phase signal. The above-mentioned injection characteristic parameters include an injection advance angle and an injection power-on time. The above-mentioned ignition characteristic parameters include an ignition advance angle and an ignition power-on time.

[0031] Specifically, the source signal detection unit is used to detect and receive a source injection signal or a source ignition signal from the engine, and identify the type of the signal, that is, determine whether the signal is an injection signal or an ignition signal, providing basic information for subsequent processing. When the signal detected by the source signal detection unit is an injection or ignition signal, the voltage acquisition unit converts the signal into an injection voltage signal or an ignition voltage signal and performs acquisition, ensuring that the signal can be processed by subsequent units in the form of voltage, improving the stability and analyzability of the signal. The ignition injection acquisition unit is the core of the entire device, receiving the injection voltage signal or the ignition voltage signal from the voltage acquisition unit, and the engine reference phase signal from the control unit. By comparing and analyzing the voltage signal with the reference phase signal, the ignition injection acquisition unit can automatically identify and determine the injection characteristic parameters (injection advance angle and injection power-on time) and the ignition characteristic parameters (ignition advance angle and ignition power-on time). The key to this process is to use the phase signal input by the control unit as a reference and synchronously analyze it with the actually collected voltage signal, so as to achieve accurate measurement of the advance angle and the power-on time. The control unit controls the signal flow between the source signal detection unit and the voltage acquisition unit, and inputs the voltage signal and the reference phase signal collected by the voltage acquisition unit into the ignition injection acquisition unit to start the parameter measurement process.

[0032] Through the collaborative work of the above-mentioned source signal detection unit, voltage acquisition unit, ignition injection acquisition unit, and control unit, the device for engine ignition and injection acquisition of the present application can automatically identify and measure the ignition advance angle, injection advance angle, and power-on time of the engine, without relying on traditional manual oscilloscopes for measurement, shortening the time for parameter acquisition, that is, improving the acquisition efficiency of engine ignition and injection parameters, and further improving the accuracy and efficiency of engine testing.

[0033] Further, the above-mentioned voltage acquisition unit includes a first relay module, a second relay module, a current-voltage conversion module, and a voltage acquisition module. The fixed end of the first contact of the first relay module is electrically connected to the output end of the source signal detection unit, and the movable end of the first contact is movably connected to the first end of the current-voltage conversion module or the first end of the wire in parallel with the current-voltage conversion module; the fixed end of the second contact of the second relay module is connected to the second end of the current-voltage conversion module, and the movable end of the second contact is movably connected to the input end of the voltage acquisition module and the input end of the ignition injection acquisition unit.

[0034] Specifically, the fixed end of the first contact of the first relay module is electrically connected to the output end of the source signal detection unit for receiving the source injection signal or the source ignition signal; the movable end of the first contact of the first relay module has two possible connection states. One is that when the detected signal is an injection signal, the movable end will be connected to the first end of the current-voltage conversion module, so that the injection current signal can be processed by the current-voltage conversion module and converted into a voltage signal for easy analysis. The other is that if the detected signal is an ignition signal, the movable end is connected to the first end of the wire in parallel with the current-voltage conversion module to keep the voltage characteristics of the ignition signal unchanged and directly perform subsequent processing.

[0035] It can be understood that the current-voltage conversion module is used to process the injection signal. Since the injection signal is a current signal, when the injection signal is detected, the movable end of the first contact of the first relay module is connected to the first end of the current-voltage conversion module, and the injection signal is processed by the current-voltage conversion module and converted into a voltage signal for subsequent signal analysis and parameter measurement.

[0036] The fixed end of the second contact of the second relay module is connected to the second end of the current-voltage conversion module for receiving the voltage signal. The movable end of the second contact of the second relay module can be selectively connected to the input end of the voltage acquisition module or the input end of the ignition injection acquisition unit. This design allows the control unit to dynamically control the signal flow according to the test requirements, that is, when voltage amplitude acquisition is required, the second contact of the second relay module is connected to the voltage acquisition module through control; while when measuring the advance angle and power-on time, the signal is guided to the ignition injection acquisition unit.

[0037] Through the design of the above relay module and current-voltage conversion module, the intelligent identification and conversion of injection and ignition signals, as well as the automatic acquisition and analysis of voltage signals, are realized, thus significantly improving the efficiency and accuracy of engine ignition and injection parameter acquisition. This flexibility and automatic processing ability are not available in traditional manual oscilloscope measurements and have a significant improvement effect on engine performance testing and fault diagnosis.

[0038] Furthermore, the above first relay module includes a first relay and a first IO output board. The first relay includes a first coil and the first contact. The input end of the first IO output board is electrically connected to the first signal output end of the control unit, and the output end of the first IO output board is electrically connected to the coil of the first relay; the second relay module includes a second relay and a second IO output board. The second relay includes a second coil and the second contact. The input end of the second IO output board is electrically connected to the second signal output end of the control unit, and the output end of the second IO output board is electrically connected to the coil of the second relay.

[0039] Specifically, the first relay module includes a first relay and a first IO output board. Among them, the first relay includes a first coil and a first contact. The input end of the first IO output board is connected to the first signal output end of the control unit, and the output end of the first IO output board is connected to the coil of the first relay. This design enables the control unit to control the first relay coil to be energized or de-energized by outputting a control signal to the first IO output board, thereby adjusting the state of the first contact, and thus flexibly controlling the path of the injection or ignition signal, and selectively guiding the injection or ignition signal to the current-voltage conversion module or directly outputting a voltage signal.

[0040] The second relay module includes a second relay and a second IO output board. Its working principle is similar to that of the first relay module, but its function focuses on the control of the voltage signal acquisition path. The second relay includes a second coil and a second contact. The input end of the second IO output board is connected to the second signal output end of the control unit, and the output end of the second IO output board is connected to the coil of the second relay. When the control unit sends a control signal to the second IO output board, the coil of the second relay will be energized, causing the second contact to conduct, and transmitting the converted voltage signal or the direct voltage signal to the voltage acquisition module for amplitude acquisition; in the non-conducting state, the signal is led to the ignition injection acquisition unit for the measurement of the advance angle and the power-on time.

[0041] The above relay control design not only enhances the flexibility of the device, enabling it to automatically select an appropriate signal processing path according to different signal types and test requirements, but also realizes precise control of the relay state through the integrated control of the control unit and the IO output board, ensuring the accuracy and efficiency of signal conversion and acquisition, and providing a technical basis for the rapid and precise acquisition of the ignition and injection characteristic parameters of the engine.

[0042] The embodiment of the present application also provides a method for engine ignition and injection acquisition. The above method for engine ignition and injection acquisition is applied to any one of the above devices for engine ignition and injection acquisition, such as Figure 2 As shown, the method includes the following steps:

[0043] Step S201, if the control unit receives a signal as an injection voltage signal from the voltage acquisition unit, input the above injection voltage signal and the engine reference phase signal into the ignition injection acquisition unit, so that the ignition injection acquisition unit determines injection characteristic parameters according to the above injection voltage signal and the above engine reference phase signal. The above injection characteristic parameters include injection advance angle and injection power-on time;

[0044] Specifically, when the control unit monitors that the signal received from the voltage acquisition unit is an injection voltage signal, input this injection voltage signal and the pre-prepared engine reference phase signal into the ignition injection acquisition unit together. Then, the ignition injection acquisition unit will calculate injection characteristic parameters, including injection advance angle and injection power-on time, based on the relative positions of the injection voltage signal and the reference phase signal. This process is essentially to determine the advance degree of the injection event relative to a specific phase point of the engine and the energization duration of the injector solenoid valve by comparing the waveform changes of the voltage signal with the phase information during engine operation. These two parameters are crucial for the performance optimization of the engine.

[0045] Step S202, if the control unit receives a signal as an ignition voltage signal from the above voltage acquisition unit, input the above ignition voltage signal into the above ignition injection acquisition unit, and input the above engine reference phase signal into the above ignition injection acquisition unit, so that the ignition injection acquisition unit determines ignition characteristic parameters according to the above ignition voltage signal and the above engine reference phase signal. The above ignition characteristic parameters include ignition advance angle and ignition power-on time.

[0046] Specifically, when the control unit recognizes that the signal received from the voltage acquisition unit is an ignition voltage signal, it will also send the ignition voltage signal and the engine reference phase signal to the ignition injection acquisition unit. At this time, the ignition injection acquisition unit measures the ignition characteristic parameters according to the relationship between the ignition voltage signal and its corresponding engine phase, including the ignition advance angle and the ignition power-on time. Different from the injection signal, the determination of the characteristic parameters of the ignition signal focuses on the advance degree of the spark plug discharge relative to a specific engine phase and the duration of the spark plug discharge, which is extremely crucial for the ignition timing control and combustion efficiency optimization of the engine.

[0047] Through the above processing flow, this method significantly simplifies the traditional manual measurement process of engine ignition and injection parameters, realizes the real-time and automation of data acquisition, and greatly improves the test efficiency and data accuracy. It avoids the common misreading and delay in manual oscilloscope measurement and ensures the accurate determination of injection and ignition parameters.

[0048] In some specific embodiments, the above voltage acquisition unit includes a first relay module, a second relay module, and a current-voltage conversion module. The fixed end of the first contact of the first relay module is electrically connected to the output end of the source signal detection unit, and the movable end of the first contact is movably connected to the first end of the current-voltage conversion module or the first end of the wire parallel to the current-voltage conversion module; the fixed end of the second contact of the second relay module is connected to the second end of the current-voltage conversion module, and the movable end of the second contact is movably connected to the input end of the voltage acquisition module and the input end of the ignition injection acquisition unit. The method further includes: if the signal received by the control unit from the source signal detection unit is a source injection signal, the control unit controls the movable end of the first contact of the first relay to be connected to the first end of the current-voltage conversion module, and controls the movable end of the second contact of the second relay module to be movably connected to the input end of the voltage acquisition module to obtain the injection voltage signal; if the signal received by the control unit from the source signal detection unit is a source ignition signal, the control unit controls the movable end of the first contact of the first relay to be connected to the first end of the wire parallel to the current-voltage conversion module, and controls the movable end of the second contact of the second relay module to be movably connected to the input end of the voltage acquisition module to obtain the ignition voltage signal.

[0049] Specifically, when the control unit recognizes that the signal received from the source signal detection unit is a source injection signal, it adjusts the movable end of the first contact of the first relay module to connect it to the first end of the current-voltage conversion module. At the same time, the control unit controls the movable end of the second relay module to connect to the input end of the voltage acquisition module. This series of actions triggers the conversion of the injection current signal through the current-voltage conversion module into an injection voltage signal, which is then captured by the voltage acquisition module. The injection voltage signal obtained by the voltage acquisition module and the engine reference phase signal from the control unit are input into the ignition injection acquisition unit together for the calculation of injection characteristic parameters.

[0050] When the information fed back by the source signal detection unit to the control unit is a source ignition signal, the control unit adjusts the movable end of the first contact to connect it to the first end of the wire in parallel with the current-voltage conversion module, bypassing the current-voltage conversion link because the ignition signal is already in voltage form and does not need to be converted. At the same time, the control unit controls the movable end of the second contact to connect to the input end of the voltage acquisition module. The ignition voltage signal is captured by the voltage acquisition module and input into the ignition injection acquisition unit together with the engine reference phase signal for the determination of ignition characteristic parameters.

[0051] In this way, when different types of signals are detected, the signal path and conversion logic can be intelligently adjusted, which not only simplifies the acquisition process but also improves the accuracy and efficiency of signal acquisition, ensuring a quick response when facing the complex and changeable control signals of the engine and effectively supporting the optimization of engine performance and fault diagnosis.

[0052] In some embodiments, the above method further includes: the control unit generates the above engine reference phase signal according to the expected operating parameters of the engine, the above engine reference phase signal includes a crankshaft reference phase signal and a camshaft reference phase signal, and the above expected operating parameters of the engine include an expected operating speed, an expected operating rotational speed, and an expected operating power.

[0053] Specifically, the control unit generates the engine reference phase signal according to the preset expected operating parameters of the engine, and these expected operating parameters include an expected operating speed, an expected operating rotational speed, and an expected operating power. This means that during the test, the control unit can generate a phase signal that matches the preset operating conditions of the engine under specific working conditions as the time reference for ignition and injection events.

[0054] The crankshaft reference phase signal reflects the angular information of the engine crankshaft rotation and is crucial for determining the relationship between ignition and injection events and the movement state of the engine piston. Since the rotation of the crankshaft directly affects the pressure and temperature changes in the engine cylinder, and thus affects the timing of ignition and injection, the generation and use of the crankshaft reference phase signal are of great importance and provide an accurate time reference for measuring the characteristic parameters of ignition and injection. The camshaft is an important component for controlling the opening and closing of the intake and exhaust valves, and its phase signal reveals the timing of the opening and closing of the intake and exhaust valves, indirectly affecting the efficiency and emissions of ignition and injection events. The accurate generation and utilization of the camshaft phase signal help to evaluate the performance indicators of the engine under more comprehensive operating conditions.

[0055] Parameters such as the expected operating speed, expected operating rotational speed, and expected operating power are not only used to guide the actual operation of the engine but also the basis for generating the reference phase signal. The setting of these parameters can simulate the operating state of the engine under different conditions, such as idle speed, acceleration, maximum power output, etc. Through precise control of the reference phase signal, the ignition injection acquisition unit can more accurately identify and calculate the injection advance angle, injection power-on time, ignition advance angle, and ignition power-on time.

[0056] In summary, by introducing the mechanism of the control unit to generate the crankshaft and camshaft reference phase signals according to the expected operating parameters, the effectiveness and application range of the engine ignition and injection acquisition method are further improved, realizing the accurate analysis of the engine control signals under various operating conditions, and providing richer and more accurate data support for the performance optimization and fault diagnosis of the engine.

[0057] Furthermore, if the signal received by the control unit from the voltage acquisition unit is an injection voltage signal, input the above injection voltage signal and the engine reference phase signal into the ignition injection acquisition unit, so that the ignition injection acquisition unit determines the injection characteristic parameters according to the injection voltage signal and the engine reference phase signal. The above injection characteristic parameters include the injection advance angle and the injection power-on time, including: if the signal received by the control unit from the voltage acquisition unit is the injection voltage signal, input the injection voltage signal and the engine reference phase signal into the ignition injection acquisition unit, so that the ignition injection acquisition unit performs a reduction process on the injection voltage signal to obtain a reduced injection voltage signal, determines the injection advance angle according to the relative position of the rising edge and / or falling edge of the reduced injection voltage signal and the engine reference phase signal, and determines the injection power-on time according to the high-level duration of the injection voltage signal.

[0058] Specifically, first, after the ignition injection acquisition unit receives the injection voltage signal forwarded by the control unit, it will perform a certain reduction process on this signal to generate a reduced injection voltage signal. This processing step aims to reduce the amplitude of the signal, which is helpful for subsequent signal analysis and feature parameter extraction. Especially in a high-noise or interference environment, the reduction process can improve the clarity of the signal and reduce measurement errors. Next, the ignition injection acquisition unit will analyze the relative positions of the rising edge or falling edge of the reduced injection voltage signal and the corresponding edge of the engine reference phase signal to determine the injection advance angle. The injection advance angle refers to the angular difference between the time point when the injector starts to work and the mark of the engine reference phase signal. By comparing the moments of the signal edges, the advance degree of the injector in the engine cycle can be accurately calculated, which is crucial for optimizing the fuel injection timing of the engine, improving combustion efficiency, and reducing emissions.

[0059] The injection power-on time, that is, the power-on time of the injector solenoid valve, is determined by measuring the duration of the injection voltage signal in the high-level state. During the injection process, when the injector receives the drive signal, its voltage will maintain in the high-level state until the injection ends. The ignition injection acquisition unit can accurately measure the injection power-on time by monitoring the duration of this high-level state, which is of great significance for evaluating the response speed and control accuracy of the injector, as well as the overall fuel economy and emission performance of the engine.

[0060] Similarly, if the signal received by the above control unit from the above voltage acquisition unit is the above ignition voltage signal, the above ignition voltage signal and the above engine reference phase signal are input into the above ignition injection acquisition unit, so that the above ignition injection acquisition unit performs a reduction process according to the above ignition voltage signal to obtain a reduced ignition voltage signal, determines the above ignition advance angle according to the relative positions of the rising edge and / or falling edge of the above reduced ignition voltage signal and the above engine reference phase signal, and determines the above ignition power-on time according to the high-level duration of the above ignition voltage signal. The principle is similar to the determination of the above injection advance angle and injection power-on time, and will not be elaborated here.

[0061] Through the above steps, in-depth analysis of the injection voltage signal and the ignition voltage signal and automatic extraction of feature parameters are achieved, which not only improves the accuracy of the data, but also simplifies the operation process, enhancing the efficiency and reliability of the test.

[0062] In this embodiment, the amplitude of the reduced injection voltage signal is 20% of the amplitude of the injection voltage signal. The above is the principle for setting the amplitude of the reduced injection voltage signal, that is, its amplitude is 20% of the amplitude of the original injection voltage signal. The purpose of this setting is to optimize the signal processing process and improve the accuracy and reliability of the measurement of injection characteristic parameters. The original injection voltage signal is the voltage signal output by the engine's electronic control unit when the injector is working, and usually has a relatively high voltage amplitude to ensure that the injector can be reliably driven. In order to facilitate the ignition injection acquisition unit to perform more refined analysis on the signal, especially the determination of the injection advance angle, the original injection voltage signal will be adjusted, and its amplitude is reduced to 20% of the original amplitude. This processing step can reduce the originally possibly excessive voltage signal to a range that is easier to control and analyze. At the same time, the lower signal amplitude also helps to reduce signal interference and distortion that may be caused by high voltage, ensuring the stability of the signal and the accuracy of the measurement results.

[0063] Similarly, if the received signal is the ignition voltage signal, the amplitude of the reduced injection voltage signal is 20% of the amplitude of the ignition voltage signal.

[0064] By reducing the amplitude of the injection voltage signal or the ignition voltage signal to 20% of its original value, the ignition injection acquisition unit can more effectively perform edge detection of the signal, thereby determining the injection advance angle and the ignition advance angle. At the same time, it is also convenient to measure the injection power-on time and the ignition power-on time, enhancing the applicability of the acquisition method and the reliability of the test results.

[0065] After obtaining the voltage amplitudes of the injection voltage signal and the ignition voltage signal, the traditional threshold setting is usually a fixed percentage, such as the 20% mentioned above. However, for different engine models under different working conditions, the fluctuation ranges of their injection voltage signals and ignition voltage signals may vary greatly. The fixed percentage threshold setting may sometimes not meet the accurate measurement requirements in all cases. This embodiment introduces an intelligent adaptive threshold adjustment algorithm, which can dynamically adjust the threshold of the ignition injection acquisition board according to the current operating state of the engine (such as speed, load, ambient temperature, etc.) and historical measurement data. For example, if the engine is in a high-load operating state, the amplitude of the injection voltage signal may increase significantly. At this time, the algorithm will correspondingly increase the threshold to avoid false triggering of the signal. On the contrary, in the case of low load or cold start, the algorithm will lower the threshold to ensure that weak signals can also be accurately captured. This adaptive algorithm can better adapt to various complex engine working conditions and improve the accuracy and consistency of the measurement of characteristic parameters.

[0066] After the movable end of the second contact of the second relay module is movably connected to the input end of the voltage acquisition module, the method further includes: after the control unit controls the connection duration between the movable end of the second contact of the second relay module and the input end of the voltage acquisition module to reach a preset duration, controlling the movable end of the second contact of the second relay module to be connected to the input end of the ignition injection acquisition unit.

[0067] Specifically, after the movable end of the second contact is connected to the input end of the voltage acquisition module, the control unit continuously monitors the duration of this connection state. When the connection duration reaches the preset duration, the control unit will change the connection state of the movable end of the second contact, switching it from the input end of the voltage acquisition module to the input end of the ignition injection acquisition unit. The preset duration is set considering signal stability, acquisition integrity, and subsequent signal processing requirements. For example, for injection voltage signals and ignition voltage signals, the preset duration needs to be long enough to ensure a complete signal waveform is captured, but not too long to avoid affecting the real-time nature of data processing. The preset duration comprehensively considers factors such as the engine's operating state, signal type, and test environment to achieve the best signal acquisition effect. By controlling the connection state of the movable end of the second relay module contact, the control unit realizes the automatic switching of signals from the voltage acquisition module to the ignition injection acquisition unit. This mechanism not only simplifies the test process, reduces manual operation errors, but also ensures the continuity and accuracy of data acquisition, improving the automation level of the engine ignition and injection acquisition method and the reliability of data acquisition.

[0068] In engine testing, in addition to ignition and injection signals, there are many other sensor data (such as temperature, pressure, oxygen sensor readings, etc.) that are crucial for evaluating the overall performance and health of the engine. However, traditional methods often only focus on the measurement of individual signals, ignoring the correlation and complementarity between sensor data. This embodiment integrates data from multiple sensors and uses advanced data analysis techniques (such as machine learning models) to identify abnormal patterns in ignition and injection signals. For example, if the ignition advance angle suddenly deviates from the normal range, or the injection power-on time does not match the current engine load, the system can quickly detect and alarm, prompting the operator that there may be potential engine performance problems. In addition, the system can also predict future possible problems based on the trend of sensor data, providing early warnings for preventive maintenance of the engine.

[0069] In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the following will specifically describe the implementation process of the engine ignition and injection acquisition method of the present application in detail with reference to specific embodiments.

[0070] This embodiment relates to a specific method for engine ignition and injection acquisition. For the schematic diagram, please refer to Figure 3 , and the flowchart is as shown in Figure 4 . First, connect the ignition or injection beam, and determine whether it is an injection signal. If it is an injection signal, the first IO output board controls the first relay to conduct (the first contact K1 is connected to the current-voltage conversion module), and converts the injection current signal into a voltage signal; if it is not an injection signal, it is an ignition signal, then the ignition signal directly outputs a voltage. Next, configure the ignition injection acquisition unit, inject the phase waveform, and let the engine run or input the rotational speed signal to the electronic control unit (ECU). Then, the second IO output board controls the second relay to conduct (the second contact K2 is connected to the voltage acquisition module), connects the voltage signal to the voltage acquisition module, obtains the current waveform voltage amplitude, and sets 20% of the amplitude as the threshold of the ignition injection acquisition unit. Set the firing order of the current connection harness, and the second IO output board controls the second relay to disconnect (the second contact K2 is connected to the ignition injection acquisition unit), and the ignition injection acquisition unit obtains the advance angle and the power-on time.

[0071] In the above process, first, the ignition or injection beam needs to be connected to the test device, and then it is determined whether the connected signal type is an injection signal or an ignition signal. This determination is crucial for the selection of the subsequent signal processing path. If the determination result is an injection signal, the first IO output board is set to 1, thereby closing the first contact K1 of the first relay and connecting it to the current-voltage conversion module. In this way, the injection signal originally existing in the form of current will be converted into a voltage signal convenient for processing through the current-voltage conversion module. If the signal is not an injection signal, it is an ignition signal. At this time, there is no need for the process of current-voltage conversion, and the ignition signal can be directly output as a voltage signal. After the signal type is confirmed and voltage conversion is selectively performed, the next step is to configure the ignition injection acquisition unit, including setting its working parameters and injecting the corresponding phase waveform. Then, the engine can be started for actual operation testing, or an analog rotational speed signal can be input to the electronic control unit (ECU) to simulate the working state of the engine. Then, the second IO output board is set to 1, so that the second contact K2 of the second relay is connected to the voltage acquisition module. In this state, the voltage signal will be sent to the voltage acquisition module for amplitude acquisition, obtaining the amplitude of the current voltage waveform, and setting 20% of it as the threshold of the ignition injection acquisition unit. This threshold setting is for the accurate triggering of subsequent signals and reducing false alarms. After the voltage signal acquisition is completed, it is also necessary to set the firing order of the current connection harness to ensure the accuracy of the acquisition process. Then, the second IO output board is set to 0, that is, the connection between the second contact K2 and the voltage acquisition module is disconnected, and it is connected to the ignition injection acquisition unit. At this time, the ignition injection acquisition unit can identify and calculate the injection advance angle or ignition advance angle, as well as the corresponding power-on time, based on the previously set threshold and phase waveform. This series of automated acquisitions and analyses greatly improves the efficiency of the test and the reliability of the data.

[0072] The embodiment of the present application also provides an engine ignition and injection characteristic acquisition device. It should be noted that the engine ignition and injection characteristic acquisition device of the embodiment of the present application can be used to execute the method for engine ignition and injection acquisition provided by the embodiment of the present application. This device is used to implement the above embodiment and the preferred implementation manner, and those that have been described will not be repeated. As used below, the term "module" can be a combination of software and / or hardware that can achieve a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware is also possible and contemplated.

[0073] The following introduces the engine ignition and injection characteristic acquisition device provided by the embodiment of the present application.

[0074] Figure 5 is a schematic diagram of the engine ignition and injection characteristic acquisition device according to the embodiment of the present application. As Figure 5As shown, the device includes a first control unit 110 and a second control unit 210. Among them, the first control unit is used to input the injection voltage signal and the engine reference phase signal to the ignition injection acquisition unit if the signal received by the control unit from the voltage acquisition unit is the injection voltage signal, so that the ignition injection acquisition unit determines injection characteristic parameters according to the injection voltage signal and the engine reference phase signal. The injection characteristic parameters include injection advance angle and injection power-on time; the second control unit is used to input the ignition voltage signal to the ignition injection acquisition unit and input the engine reference phase signal to the ignition injection acquisition unit if the signal received by the control unit from the voltage acquisition unit is the ignition voltage signal, so that the ignition injection acquisition unit determines ignition characteristic parameters according to the ignition voltage signal and the engine reference phase signal. The ignition characteristic parameters include ignition advance angle and ignition power-on time.

[0075] Specifically, when the control unit monitors that the signal received from the voltage acquisition unit is the injection voltage signal, this injection voltage signal and the pre-prepared engine reference phase signal are input to the ignition injection acquisition unit together. Then, the ignition injection acquisition unit calculates injection characteristic parameters, including injection advance angle and injection power-on time, based on the relative positions of the injection voltage signal and the reference phase signal. This process essentially determines the advance degree of the injection event relative to a specific phase point of the engine and the energization duration of the injector solenoid valve by comparing the waveform changes of the voltage signal with the phase information during engine operation. These two parameters are crucial for optimizing the performance of the engine.

[0076] When the control unit identifies that the signal received from the voltage acquisition unit is the ignition voltage signal, the ignition voltage signal and the engine reference phase signal are also sent to the ignition injection acquisition unit. At this time, the ignition injection acquisition unit measures ignition characteristic parameters, including ignition advance angle and ignition power-on time, according to the relationship between the ignition voltage signal and its corresponding engine phase. Different from the injection signal, the determination of the characteristic parameters of the ignition signal focuses on the advance degree of the spark plug discharge relative to a specific engine phase and the duration of the spark plug discharge, which is extremely critical for the ignition timing control and combustion efficiency optimization of the engine.

[0077] In some specific embodiments, the above voltage acquisition unit includes a first relay module, a second relay module, and a current-voltage conversion module. The fixed end of the first contact of the first relay module is electrically connected to the output end of the source signal detection unit, and the movable end of the first contact is movably connected to the first end of the current-voltage conversion module or the first end of the wire connected in parallel with the current-voltage conversion module. The fixed end of the second contact of the second relay module is connected to the second end of the current-voltage conversion module, and the movable end of the second contact is movably connected to the input end of the voltage acquisition module and the input end of the ignition injection acquisition unit. The method further includes: if the signal received by the control unit from the source signal detection unit is a source injection signal, the control unit controls the movable end of the first contact of the first relay to be connected to the first end of the current-voltage conversion module, and controls the movable end of the second contact of the second relay module to be movably connected to the input end of the voltage acquisition module, so as to obtain the injection voltage signal; if the signal received by the control unit from the source signal detection unit is a source ignition signal, the control unit controls the movable end of the first contact of the first relay to be connected to the first end of the wire connected in parallel with the current-voltage conversion module, and controls the movable end of the second contact of the second relay module to be movably connected to the input end of the voltage acquisition module, so as to obtain the ignition voltage signal.

[0078] Specifically, when the control unit recognizes that the signal received from the source signal detection unit is a source injection signal, it adjusts the movable end of the first contact of the first relay module to connect it to the first end of the current-voltage conversion module. At the same time, the control unit controls the movable end of the second relay module to be connected to the input end of the voltage acquisition module. This series of actions triggers the conversion of the injection current signal through the current-voltage conversion module into an injection voltage signal, which is then captured by the voltage acquisition module. The injection voltage signal obtained by the voltage acquisition module and the engine reference phase signal from the control unit are input into the ignition injection acquisition unit together to calculate the injection characteristic parameters.

[0079] When the information fed back by the source signal detection unit to the control unit is a source ignition signal, the control unit adjusts the movable end of the first contact to connect it to the first end of the wire connected in parallel with the current-voltage conversion module, bypassing the current-voltage conversion link because the ignition signal is already in voltage form and does not need to be converted. At the same time, the control unit controls the movable end of the second contact to be connected to the input end of the voltage acquisition module. The ignition voltage signal is captured by the voltage acquisition module and input into the ignition injection acquisition unit together with the engine reference phase signal to measure the ignition characteristic parameters.

[0080] In this way, when different types of signals are detected, the signal path and conversion logic can be intelligently adjusted, which not only simplifies the acquisition process, but also improves the accuracy and efficiency of signal acquisition, ensuring a quick response when facing the complex and variable control signals of the engine and effectively supporting the optimization of engine performance and fault diagnosis.

[0081] In some embodiments, the control unit generates the engine reference phase signal according to the expected operating parameters of the engine. The engine reference phase signal includes a crankshaft reference phase signal and a camshaft reference phase signal, and the expected operating parameters of the engine include an expected operating speed, an expected operating rotational speed, and an expected operating power.

[0082] Specifically, the control unit generates the engine reference phase signal according to the preset expected operating parameters of the engine, which include the expected operating speed, the expected operating rotational speed, and the expected operating power. This means that during the test, the control unit can generate a phase signal that matches the preset operating conditions of the engine under specific working conditions as the time reference for ignition and injection events.

[0083] The crankshaft reference phase signal reflects the angular information of the rotation of the engine crankshaft and is crucial for judging the relationship between ignition and injection events and the movement state of the engine piston. Since the rotation of the crankshaft directly affects the pressure and temperature changes in the engine cylinder, and thus affects the timing of ignition and injection, the generation and use of the crankshaft reference phase signal are of great importance, providing an accurate time reference for measuring the characteristic parameters of ignition and injection. The camshaft is an important component for controlling the opening and closing of the intake and exhaust valves, and its phase signal reveals the timing of the opening and closing of the intake and exhaust valves, indirectly affecting the efficiency and emissions of ignition and injection events. The accurate generation and utilization of the camshaft phase signal contribute to evaluating the performance indicators of the engine under more comprehensive working conditions.

[0084] Parameters such as the expected operating speed, the expected operating rotational speed, and the expected operating power are not only used to guide the actual operation of the engine but also the basis for generating the reference phase signal. The setting of these parameters can simulate the operating states of the engine under different working conditions, such as idling, accelerating, and maximum power output. Through the precise control of the reference phase signal, the ignition injection acquisition unit can more accurately identify and calculate the injection advance angle, injection energization time, ignition advance angle, and ignition energization time.

[0085] In summary, by introducing the mechanism of the control unit generating the crankshaft and camshaft reference phase signals according to the expected operating parameters, the effectiveness and applicable range of the engine ignition and injection acquisition method are further improved, realizing the precise analysis of the engine control signals under various working conditions and providing richer and more accurate data support for the performance optimization and fault diagnosis of the engine.

[0086] Furthermore, if the control unit receives a signal from the voltage acquisition unit as the injection voltage signal, the injection voltage signal and the engine reference phase signal are input into the ignition injection acquisition unit, so that the ignition injection acquisition unit determines injection characteristic parameters according to the injection voltage signal and the engine reference phase signal. The injection characteristic parameters include injection advance angle and injection power-on time, including: if the signal received by the control unit from the voltage acquisition unit is the injection voltage signal, the injection voltage signal and the engine reference phase signal are input into the ignition injection acquisition unit, so that the ignition injection acquisition unit performs a reduction process on the injection voltage signal to obtain a reduced injection voltage signal, determines the injection advance angle according to the relative position of the reduced injection voltage signal and the rising edge and / or falling edge of the engine reference phase signal, and determines the injection power-on time according to the high-level duration of the injection voltage signal.

[0087] Specifically, first, after receiving the injection voltage signal forwarded by the control unit, the ignition injection acquisition unit will perform a certain reduction process on the signal to generate a reduced injection voltage signal. This processing step aims to reduce the amplitude of the signal, which is helpful for subsequent signal analysis and characteristic parameter extraction. Especially in a high-noise or interference environment, the reduction process can improve the clarity of the signal and reduce measurement errors. Next, the ignition injection acquisition unit will analyze the relative position of the rising edge or falling edge of the reduced injection voltage signal and the corresponding edge of the engine reference phase signal to determine the injection advance angle. The injection advance angle refers to the angular difference between the time point when the injector starts to work and the mark of the engine reference phase signal. By comparing the moments of the signal edges, the advance degree of the injector in the engine cycle can be accurately calculated, which is crucial for optimizing the fuel injection timing of the engine, improving combustion efficiency, and reducing emissions.

[0088] The injection power-on time, that is, the energization time of the injector solenoid valve, is determined by measuring the duration of the injection voltage signal in the high-level state. During the injection process, when the injector receives the drive signal, its voltage will maintain in the high-level state until the injection ends. The ignition injection acquisition unit can accurately measure the injection power-on time by monitoring the duration of this high-level state, which is of great significance for evaluating the response speed and control accuracy of the injector, as well as the overall fuel economy and emission performance of the engine.

[0089] Similarly, if the signal received by the above control unit from the above voltage acquisition unit is the above ignition voltage signal, the above ignition voltage signal and the above engine reference phase signal are input into the above ignition injection acquisition unit, so that the above ignition injection acquisition unit performs a voltage reduction process on the above ignition voltage signal to obtain a reduced ignition voltage signal, determines the above ignition advance angle according to the relative position of the rising edge and / or falling edge of the above reduced ignition voltage signal and the above engine reference phase signal, and determines the above ignition power-on time according to the high-level duration of the above ignition voltage signal. The principle is similar to the determination of the above injection advance angle and injection power-on time, and will not be elaborated here.

[0090] In this embodiment, the amplitude of the above reduced injection voltage signal is 20% of the amplitude of the above injection voltage signal. The above is the amplitude setting principle of the reduced injection voltage signal, that is, its amplitude is 20% of the amplitude of the original injection voltage signal. The purpose of this setting is to optimize the signal processing process and improve the accuracy and reliability of the measurement of injection characteristic parameters. The original injection voltage signal is a voltage signal output by the engine's electronic control unit when the injector is working, and usually has a relatively high voltage amplitude to ensure that the injector can be reliably driven. In order to facilitate the ignition injection acquisition unit to perform more refined analysis on the signal, especially the determination of the injection advance angle, the original injection voltage signal is adjusted, and its amplitude is reduced to 20% of the original amplitude. This processing step can reduce the originally possibly excessive voltage signal to a range that is easier to control and analyze. At the same time, the lower signal amplitude also helps to reduce signal interference and distortion caused by high voltage, ensuring signal stability and measurement result accuracy.

[0091] Similarly, if the received signal is the ignition voltage signal, the amplitude of the above reduced injection voltage signal is 20% of the amplitude of the above ignition voltage signal.

[0092] By reducing the amplitude of the injection voltage signal or the ignition voltage signal to 20% of its original value, the ignition injection acquisition unit can more effectively perform signal edge detection, thereby determining the injection advance angle and ignition advance angle. At the same time, it is also convenient to measure the injection power-on time and ignition power-on time, enhancing the applicability of the acquisition method and the reliability of the test results.

[0093] The above control unit is used to control the movable end of the second contact of the second relay module to be movably connected to the input end of the voltage acquisition module, and after the connection duration between the movable end of the second contact of the second relay module and the input end of the voltage acquisition module reaches a preset duration, control the movable end of the second contact of the second relay module to be connected to the input end of the ignition injection acquisition unit.

[0094] Specifically, after the movable end of the second contact is connected to the input end of the voltage acquisition module, the control unit continuously monitors the duration of this connection state. When the connection duration reaches the preset duration, the control unit changes the connection state of the movable end of the second contact, switching it from the input end of the voltage acquisition module to the input end of the ignition injection acquisition unit. The preset duration is set considering signal stability, acquisition integrity, and subsequent signal processing requirements. For example, for injection voltage signals and ignition voltage signals, the preset duration needs to be long enough to ensure a complete signal waveform is acquired, but not too long to avoid affecting the real-time performance of data processing. The preset duration comprehensively considers factors such as the engine operating state, signal type, and test environment to achieve the best signal acquisition effect. By controlling the connection state of the movable end of the second relay module contact, the control unit realizes the automatic switching of signals from the voltage acquisition module to the ignition injection acquisition unit. This mechanism not only simplifies the test process, reduces manual operation errors, but also ensures the continuity and accuracy of data acquisition, improving the automation level of the engine ignition and injection acquisition method and the reliability of data acquisition.

[0095] The above-mentioned engine ignition and injection feature acquisition device includes a processor and a memory. The above-mentioned first control unit, second control unit, etc. are all stored in the memory as program units, and the corresponding functions are realized by the processor executing the above-mentioned program units stored in the memory. The above-mentioned modules are all located in the same processor; or, the above-mentioned each module is located in different processors in any combined form.

[0096] The memory may include non-permanent memory in a computer-readable medium, forms such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash memory (flash RAM), and the memory includes at least one storage chip.

[0097] An embodiment of the present invention provides a vehicle, including an engine and any one of the above-mentioned engine ignition and injection acquisition devices.

[0098] An embodiment of the present invention provides a computer-readable storage medium. The above-mentioned computer-readable storage medium includes a stored program, wherein when the above-mentioned program runs, it controls the device where the above-mentioned computer-readable storage medium is located to execute the above-mentioned engine ignition and injection acquisition method.

[0099] This application also provides a computer program product, which is suitable for executing a program for initializing the steps of the above-mentioned engine ignition and injection acquisition method when executed on a data processing device.

[0100] Obviously, those skilled in the art should understand that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device. They can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. They can be implemented by program codes executable by the computing device. Thus, they can be stored in a storage device and executed by the computing device. And in some cases, the steps shown or described can be executed in a different order than here, or they can be separately fabricated into individual integrated circuit modules, or multiple modules or steps among them can be fabricated into a single integrated circuit module for implementation. In this way, the present invention is not limited to any specific combination of hardware and software.

[0101] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0102] The present application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, as well as the combination of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0103] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device that implements the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0104] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide for implementing the functions in the flowFigure 1 one or more processes and / or blocks Figure 1 steps of the functions specified in one or more blocks

[0105] In a typical configuration, a computing device includes one or more processors (CPUs), an input / output interface, a network interface, and memory.

[0106] The memory may include non-permanent memory in the form of computer-readable media, random access memory (RAM) and / or non-volatile memory such as read-only memory (ROM) or flash memory (flash RAM). Memory is an example of computer-readable media.

[0107] Computer-readable media includes permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology for information storage. The information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette tapes or other magnetic storage devices, or any other non-transitory media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory media such as modulated data signals and carrier waves.

[0108] It should also be noted that the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, commodity or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, commodity or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, commodity or device comprising the element.

[0109] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A device for engine ignition and injection collection, characterized in that: include: A source signal detection unit, a voltage acquisition unit, an ignition injection acquisition unit and a control unit, wherein the source signal detection unit is electrically connected to the voltage acquisition unit, and the control unit is electrically connected to the source signal detection unit, the voltage acquisition unit and the ignition injection acquisition unit, respectively. The signal detected by the source signal detection unit is a source injection signal or a source ignition signal, and the voltage acquisition unit is used to acquire an injection voltage signal or an ignition voltage signal; The control unit is used to input the injection voltage signal or the ignition voltage signal into the ignition injection acquisition unit, and input the engine reference phase signal into the ignition injection acquisition unit, the ignition injection acquisition unit is used to determine the injection characteristic parameters according to the injection voltage signal and the engine reference phase signal, and is used to determine the ignition characteristic parameters according to the ignition voltage signal and the engine reference phase signal, the injection characteristic parameters include the injection advance angle and the injection power-on time, and the ignition characteristic parameters include the ignition advance angle and the ignition power-on time.

2. The device for engine ignition and injection collection according to claim 1, characterized in that: The voltage acquisition unit includes a first relay module, a second relay module, a current-voltage conversion module and a voltage acquisition module, wherein a fixed end of a first contact of the first relay module is electrically connected to an output end of the source signal detection unit, and a movable end of the first contact is movably connected to a first end of the current-voltage conversion module or a first end of a wire connected in parallel with the current-voltage conversion module; The fixed end of the second contact of the second relay module is connected to the second end of the current-voltage conversion module, and the movable end of the second contact is movably connected to the input end of the voltage acquisition module and the input end of the ignition injection acquisition unit.

3. The device for engine ignition and injection collection according to claim 2, characterized in that: The first relay module includes a first relay and a first IO output card, the first relay includes a first coil and the first contact, the input end of the first IO output card is electrically connected to the first signal output end of the control unit, and the output end of the first IO output card is electrically connected to the coil of the first relay; The second relay module includes a second relay and a second IO output board, the second relay includes a second coil and the second contact, the input end of the second IO output board is electrically connected to the second signal output end of the control unit, and the output end of the second IO output board is electrically connected to the coil of the second relay.

4. A method for engine ignition and injection collection, characterized in that: The method for collecting engine ignition and injection is applied to the device for collecting engine ignition and injection according to any one of claims 1 to 3, comprising: If the control unit receives a signal from the voltage acquisition unit that is an injection voltage signal, the control unit inputs the injection voltage signal and the engine reference phase signal into the ignition injection acquisition unit, so that the ignition injection acquisition unit determines injection characteristic parameters according to the injection voltage signal and the engine reference phase signal, wherein the injection characteristic parameters include an injection advance angle and an injection power-on time; If the control unit receives a signal from the voltage acquisition unit that is an ignition voltage signal, the ignition voltage signal is input into the ignition injection acquisition unit, and the engine reference phase signal is input into the ignition injection acquisition unit, so that the ignition injection acquisition unit determines ignition characteristic parameters according to the ignition voltage signal and the engine reference phase signal, and the ignition characteristic parameters include an ignition advance angle and an ignition power-on time.

5. The method for engine ignition and injection collection according to claim 4, characterized in that: The voltage acquisition unit includes a first relay module, a second relay module and a current-voltage conversion module, a fixed end of a first contact of the first relay module is electrically connected to an output end of the source signal detection unit, and a movable end of the first contact is movably connected to a first end of the current-voltage conversion module or a first end of a wire connected in parallel with the current-voltage conversion module; a fixed end of a second contact of the second relay module is connected to a second end of the current-voltage conversion module, and a movable end of the second contact is movably connected to an input end of the voltage acquisition module and an input end of the ignition injection acquisition unit, and the method further includes: If the signal received by the control unit from the source signal detection unit is a source injection signal, the control unit controls the active end of the first contact of the first relay to be connected to the first end of the current-voltage conversion module, and controls the active end of the second contact of the second relay module to be actively connected to the input end of the voltage acquisition module, so as to obtain the injection voltage signal; If the signal received by the control unit from the source signal detection unit is a source ignition signal, the control unit controls the active end of the first contact of the first relay to be connected to the first end of the wire in parallel with the current-voltage conversion module, and controls the active end of the second contact of the second relay module to be actively connected to the input end of the voltage acquisition module to obtain the ignition voltage signal.

6. The method for engine ignition and injection collection according to claim 4, characterized in that: The method further comprises: The control unit generates the engine reference phase signal according to expected engine operating parameters, wherein the engine reference phase signal includes a crankshaft reference phase signal and a camshaft reference phase signal, and the expected engine operating parameters include an expected operating speed, an expected operating rotation speed, and an expected operating power.

7. The method for engine ignition and injection collection according to claim 4, characterized in that: If the control unit receives a signal from the voltage acquisition unit that is an injection voltage signal, the injection voltage signal and the engine reference phase signal are input to the ignition injection acquisition unit, so that the ignition injection acquisition unit determines the injection characteristic parameters according to the injection voltage signal and the engine reference phase signal, and the injection characteristic parameters include the injection advance angle and the injection power-on time, including: If the signal received by the control unit from the voltage acquisition unit is the injection voltage signal, the injection voltage signal and the engine reference phase signal are input into the ignition injection acquisition unit, so that the ignition injection acquisition unit performs reduction processing on the injection voltage signal to obtain a reduced injection voltage signal, determines the injection advance angle according to the relative position of the rising edge and / or falling edge of the reduced injection voltage signal and the engine reference phase signal, and determines the injection power-on time according to the high level duration of the injection voltage signal.

8. The method for engine ignition and injection collection according to claim 7, characterized in that: The amplitude of the reduced-amplitude injection voltage signal is 20% of the amplitude of the injection voltage signal.

9. The method for engine ignition and injection collection according to claim 5, characterized in that: After controlling the active end of the second contact of the second relay module to be movably connected to the input end of the voltage acquisition module, the method further includes: The control unit controls the active end of the second contact of the second relay module to be connected to the input end of the voltage collection module after the connection time reaches a preset time, and then controls the active end of the second contact of the second relay module to be connected to the input end of the ignition injection collection unit.

10. An engine ignition and injection feature acquisition device, characterized in that: include: a first control unit, configured to input the injection voltage signal and the engine reference phase signal to the ignition injection acquisition unit if the control unit receives the injection voltage signal from the voltage acquisition unit, so that the ignition injection acquisition unit determines the injection characteristic parameters according to the injection voltage signal and the engine reference phase signal, wherein the injection characteristic parameters include the injection advance angle and the injection power-on time; a second control unit, for inputting the ignition voltage signal into the ignition injection acquisition unit and the engine reference phase signal into the ignition injection acquisition unit if the signal received by the control unit from the voltage acquisition unit is an ignition voltage signal, so that the ignition injection acquisition unit determines ignition characteristic parameters according to the ignition voltage signal and the engine reference phase signal, wherein the ignition characteristic parameters include an ignition advance angle and an ignition power-on time.

11. A vehicle, characterized in that: include: engine; The device for engine ignition and injection collection as claimed in any one of claims 1 to 3.

Images